Skocz do pozycji: 1.

Tytuł:

The influence of the degree of iron-ore enrichment on it’s metallization parameters

Autorzy:

Amdur, A. M.
Pelevin, A. E.
Purevsuren, B.
Munkhtuul, L.
Raznitsina, A. L.

Powiązania:

https://bibliotekanauki.pl/articles/411734.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Fe
iron ore
coal
magnetite ore
production of superconcentrate
enrichment of ore

Opis:

Have been developed a scheme of enrichment (benification) of magnetite iron-ore concentrates with total content of Fet = 31 % in ore at magnetic separator and obtained a superconcentrate with Fet = 69,50 %. Experimentally determined that the reduction reaction degree of Fe by coal increases linearly with increasing of the content of Fe in concentrate. Certainly it has positive influence of decreasing the content of more difficult for reduction and poor magnetic iron containing components in the processing of wet magnetic separation (WMS). Almost all iron are in the form of good to reduce magnetite in the superconcentrates and enrichment of concentrate accompanying with growth of specific surface.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 14; 89-95
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Investigating the effectiveness of organic binders as an alternative to bentonite in the pelletization of low grade iron ore

Autorzy:

Tafadzwa, Ngara
Mavengere, Shielah
Bright, Sharrydon
Mapamba, Liberty

Powiązania:

https://bibliotekanauki.pl/articles/27323655.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

bentonite
iron ore
low grade ore
organic binder
pelletization
pellet evaluation
refractory ore

Opis:

Bentonite is the traditionally used binder in iron ore pelletization. However, it consists of up to 85% silica and alumina which are undesired acidic gangue in iron-making. In this study, carboxymethyl cellulose, sodium lignosulfonate and cornstarch were used as acidic gangue-free organic alternatives to bentonite in synthesizing iron pellets. Iron ore, water and the corresponding binder were mixed and rolled in a pelletizing disk to form green pellets. The green pellets were dried and subsequently indurated in a furnace at 1200 ℃ to form indurated pellets. To evaluate the effectiveness of the organic binders, the pellets produced were tested on various pellet properties. Known industrial pellet property standards and the bentonite binder were used as references. Carboxymethyl cellulose, sodium lignosulfonate and corn starch produced green pellets with average drop numbers of 7.20 ± 0.84, 5.60 ± 0.89 and 6.00 ± 1.00 respectively, compared to bentonite’s 5.00 ± 0.71. Dry pellets of average compressive strength 5.93 ± 0.09, 5.86 ± 0.03 and 11.52 ± 0.18 kg/pellet were produced by carboxymethyl cellulose, sodium lignosulfonate and corn starch respectively while bentonite’s averaged 5.60 ± 0.08 kg/pellet. For indurated pellets, carboxymethyl cellulose (210.2 ± 1.88 kg/pellet) and sodium lignosulfonate (198.1 ± 2.49 kg/pellet) pellets were weaker than those of bentonite (250.4 ± 2.06 kg/pellet) but satisfied the industrial requirement of 181.4 kg/pellet. A boron oxide additive (0.1 wt. %) was used to boost the strength of carboxymethyl cellulose indurated pellets to 252.6 ± 1.32 kg/pellet, rendering them superior to those of bentonite.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 176094
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Water chemical composition characteristic in the upper part of the Sztoła River

Autorzy:

Juśko, K.
Kasprzak, A.
Pietrzak, D.

Powiązania:

https://bibliotekanauki.pl/articles/184148.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

zinc ore mining
lead ore mining
sand extraction

Opis:

The Sztoła River crosses Lesser Poland and Silesia voivodships in the region of Olkusz zinc and lead ores mining and sands extraction. It is one of the left-bank tributary of Biała Przemsza. Its sources are located southwest of Olkusz. In the geological structure of Sztoła water catchment area, on the basis of conducted drillings, the following deposits can be distinguished: Paleozoic, represented by Permian deposits, Mezozoic-Triassic deposits, and Cenozoic-Quaternary deposits (Buła 2000, Motyka 2010). Hydrodynamic conditions in the region of Sztoła have been strongly interrupted by the development of zinc and lead ores mining and a sand pit, which required an application of drainage. The first system of drainage was adits built in 16 th century, which resulted in a decrease of the groundwater table level from few to over a dozen meters (Żukowski 1946, Górnisiewicz 1975, Molenda 1977, Kosiński 1882). The intensive development of mining in this region began in the first half of 19 th century, along with appearance of new drainage techniques. The Sztoła River changed its character from draining to infiltrating on its the whole length as the effect of development of vast zinc and lead ores mine depression cone, related to the exploitation of the „Pomorzany” mine, and later with a gravitational drainage of sandpit „Szczakowa” (Witczak & Motyka 1975, Haładus et al. 2007). In the upper part of the river it resulted with a partial dry out of the riverbed. Water flowing in the river originated from the drainage of Olkusz zinc and lead ores mines and is directed there through Baba channel. A research conducted in the summer of 2014 examined the upper part of the Sztoła River. Groundwater taken from springs, as well as surface water, was collected, and the areas of critical riverbed dry out were identified. A complete physicochemical analysis was carried out in the AGH hydrogeochemical laboratory in Cracow. On the basis of the received data, the characteristics of chemical composition of groundwater and surface water were prepared. Their hydrochemical type, pH values, electrolytical conductivity was determined. Chemical composition was also presented in the selected graphical forms (Piper, Collins, Pie Chart). Based on analysis, the statistical parameters of composition of water from the research region were calculated. Furthermore, the quality of underground and surface water was evaluated according to the existing standards, and suitability to consumption by people was determined. The Obtained data were also compared with archival results of samples collected within the investigated area.

Źródło:

Geology, Geophysics and Environment; 2016, 42, 1; 81-82
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Characterization and beneficiation of iranian low-grade manganese ore

Autorzy:

Mehdilo, A.
Irannajad, M.
Hojjati-Rad, M. R.

Powiązania:

https://bibliotekanauki.pl/articles/110939.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

pyrolusite
manganese ore
ore characterization
gravity separation
magnetic separation

Opis:

The mineralogical studies indicated that the Charagah ore deposit contains approximately 17% pyrolusite, 78% calcite and 3–4% quartz. Pyrolusite as a main valuable mineral is found in the forms of coarse and fine pyrolusites. The coarse grains pyrolusite with simple texture is liberated at 180 micrometers. Another kind of pyrolusite with particle size finer than 10 m is disseminated inside gangue phases. This kind of pyrolusite has important effect in beneficiation processes and can affect the manganese grade of the concentrate and its recovery negatively. By jigging machine a pre-concentrate with 20% MnO and a final tailing with about 13% manganese loss are obtained. Using tabling technique or wet high intensity magnetic separation (WHIMS) and also their combination with jigging machine, production of a final pyrolusite concentrate with suitable grade but average recovery is possible. By jigging-tabling a concentrate with – 500+45 m size fraction, 44.3% MnO and 61.3% recovery is obtained while jigging-WHIMS produces a concentrate containing 52.6% MnO with a recovery up to 56.6% and d80 = 180 m.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 725-741
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Application of a biconical dense medium cyclone to pre-treat a low-grade Pb-Zn sulfide ore

Autorzy:

Jian, Sheng
Sun, Wei
Zheng, Yong-xing

Powiązania:

https://bibliotekanauki.pl/articles/110536.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

Pb-Zn sulfide ore
Low-grade ore
Pretreatment
Biconical dense medium cyclone

Opis:

A biconical dense medium cyclone (BDMC) was applied to reject the gangue from a low-grade Pb-Zn sulfide ore for the first time. Based on mineralogy and heavy liquid separation tests, it was found that the rejection of gangue by the BDMC prior to grinding and flotation was promising. The results revealed that the particle size clearly affected the heavy liquid separation process. The effects of several parameters, such as medium specific gravity (SG), spigot diameter, tilt angle, cone angle and medium/ore mass ratio, on the yield of floats and on the metal recoveries in the floats were examined and the optimal parameters were determined. The results showed that 51.22% of floats were obtained with a lead recovery of 7.92% and a zinc recovery of 12.50%. The extended tests were further carried out with the BDMC being capable of throughputs about 3 t/h, which verified the results obtained in the laboratory experiments. The use of this equipment to pre-treat the refractory ore is promising.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 4; 981-990
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Ore Microscopy Characterization as a Mineral Processing Control
Mikroskopowa charakterystyka rudy jako kontrola przetwarzania minerału

Autorzy:

Tomanec, R.
Cablik, V.
Simovic, I.
Gacina, R.

Powiązania:

https://bibliotekanauki.pl/articles/318371.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

applied ore microscopy
copper ore
mineral liberation
mikroskopia rudy
rudy miedzi
minerały uwolnione

Opis:

The mineral deposit Bor-Cerovo is a relatively simple Cu-(Fe)ore that is becoming poorer and more complex in texture with the depth of mining. The Bor Copper Mine has expanded mine workings to the Cerovo field margins, where the same type of porphyry copper ore was found for which the Bor Mine is known as one of largest in Europe. Under the oxidized zone in the vertical deposit section lie paragenetic mineral associations typical of the cementated zone, or a transitional layer from the primary mineralized rock. Average concentrations of sulphide copper and oxide copper in the primary rock range from 0.263% to 0.164% and from 0.102% to 0.008%, respectively. Concentration of the ore of simple mineral composition has given a product of unsatisfactory both concentrate quality and metal recovery. More study is felt necessary of the structural/textural properties, of the identified mineral relations, and of the rate of mineral product liberation for the given grind fineness. Mineralogical analyses were conducted in the course of laboratory (and technological) tests. It has been learned that chemical analyses of the floatation concentrated material alone were inadequate, especially where complex texture of intergrowths and poor ore were involved. Structural properties and complex integrowths, and concequently low liberation degree, were found to be the reason of poor concentration. This paper discusses importance of the mineral liberation measurement for the technological results of copper ore concentration at the Bor-Cerovo flotation plant, and explains the functional relation between the mineral liberation and the grind fineness. Data on the microscopy of ore texture and the mineral liberation degree presented in this paper are aimed at improving the recovery and grade of chalcopyrite concentrate in the Veliki Krivelj Flotation Plant. Ore microscopy in the laboratory and technological tests indicate that chemical analysis as a tool for monitoring ore flotation is insufficient, especially where the processed ore is complex-textured and poor.
Złoże mineralne Bor-Cerovo jest stosunkowo prostą rudą Cu-(Fe), która staje się uboższa i bardziej złożona w teksturze wraz z głębokością wydobywania. Kopalnia miedzi Bor rozszerzyła prace wydobywcze do granic obszaru Cerovo gdzie znaleziono ten sam typ porfirowej rudy miedzi, z którego kopalnia Bor jest znana jako największa w Europie. Poniżej strefy utlenionej w pionowej strefie złoża znajduje się zespół paragenetycznego minerału typowego dla strefy cementacji, lub warstwa przejściowa ze skały pierwotnie zmineralizowanej. Średnie stężenie siarczanu miedzi i tlenku miedzi w skale pierwotnej znajduje się w przedziale kolejno od 0,263% do 0,164% oraz od 0,102% do 0,008%. Stężenie w rudzie niezłożonego minerału daje produkt niezadowalający pod względem zarówno jakości koncentratu jak i odzysku metalu. Koniecznych jest więcej badań na temat właściwości strukturalnych/tekstury, identyfikacji zależności minerału, oraz na temat stopnia wyzwalania produktu mineralnego dla danego stopnia rozdrobnienia. Przeprowadzono analizę mineralogiczną podczas badań laboratoryjnych (i technologicznych). Dowiedziano się, że analiza chemiczna i flotacja koncentratu mineralnego była nieadekwatna, szczególnie gdy zaangażowana była skomplikowana struktura narostów między ziarnami i uboga ruda. Odkryto, że właściwości strukturalne i skomplikowane narosty, a co za tym idzie niski stopień uwalniania, były powodem ubogiej koncentracji. Artykuł ten omawia znaczenie pomiarów uwalniania minerału dla wyników technologicznych koncentracji miedzi w rudzie w zakładzie flotacyjnym Bor-Cerovo, i wyjaśnia funkcjonalną zależność miedzi uwalnianiem minerału a stopniem rozdrobnienia. Dane mikroskopowe tekstury rudy i stopnia uwalniania minerału prezentowane w tym artykule mają na celu polepszenie odzyskiwania i stopnia koncentratu chalkopirytu w zakładzie flotacyjnym VelikiKrivelj. Laboratoryjne i technologiczne badania mikroskopowe rudy wykazują, że analiza chemiczna jako narzędzie monitorowania flotacji rudy jest niewystarczająca, szczególnie jeśli przetwarzana ruda ma skomplikowaną teksturę i jest uboga.

Źródło:

Inżynieria Mineralna; 2014, R. 15, nr 2, 2; 101-106
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:

Evaluation of organic carbon separation from copper ore by pre-flotation

Autorzy:

Konieczny, A.
Pawlos, W.
Krzeminska, M.
Kaleta, R.
Kurzydlo, P.

Powiązania:

https://bibliotekanauki.pl/articles/109321.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

flotation
carbonaceous matter
copper ore

Opis:

This paper describes possibilities of organic carbon matter separation during a pre-flotation stage in KGHM Polska Miedz, Division of Concentrators. The paper contains a survey of organic carbon removal technologies in worldwide plants as well as KGHM achievements in this field. Laboratory flota-tion testing results have also been described. Next, an industrial scale trial at Polkowice Concentrator has been conducted to confirm the previous laboratory results. The results have been discussed. They indicate a positive role of the pre-flotation stage on organic carbon removal using only frother as the flotation reagent.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 1; 189-201
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Department of Geophysics

Autorzy:

Jarzyna, J.
Dec, J.
Wawrzyniak-Guz, K.

Powiązania:

https://bibliotekanauki.pl/articles/184176.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

black coal
copper
iron ore

Źródło:

Geology, Geophysics and Environment; 2016, 42, 2; 236-240
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:

New survey of lead and zinc ore mineralization in Republic of Kosovo

Autorzy:

Kołodziejczyk, J.
Prsek, J.
Qela, H.
Asllani, B.

Powiązania:

https://bibliotekanauki.pl/articles/184232.pdf

Data publikacji:

2012

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

ore mineralogy
Kosovo
Trepca deposit

Opis:

Kosovo lead and zinc ore deposits are located in the Trepca Belt which extends for over 80 km. Several ore deposits occur in that belt, with the most important - Stan Terg (Trepca). Stan Terg deposit originating at the contact between volcanic breccias and carbonate rocks. Two different types of mineralization can be distinguished. The older one has origin related to pneumatolitic processes, when skarns were formed. The more recent one was formed by hydrothermal processes and has the largest economic importance. Over 70 minerals have been recognized in the Trepca deposit. Further mineralogical investigations will allow for the identification of other rare minerals.

Źródło:

Geology, Geophysics and Environment; 2012, 38, 3; 295-305
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Studies on hydrometallurgical processes using nuclear techniques to be applied in copper industry. I. Application of 64Cu radiotracer for investigation of copper ore leaching

Autorzy:

Smoliński, T.
Rogowski, M.
Brykała, M.
Pyszynska, M.
Chmielewski, A. G.

Powiązania:

https://bibliotekanauki.pl/articles/147894.pdf

Data publikacji:

2018

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

copper ore
hydrometallurgy
leaching
NAA

Opis:

Scientific objective of this work was elaboration of radiometric method for the development of hydrometallurgical process for recovery of Cu from the copper ore. A neutron activation analysis (NAA) was identified as a very convenient tool for the process investigation. The samples of copper ore were activated in a nuclear reactor. The parameters of the neutron activation were calculated. Radioisotope 64Cu was selected as an optimal tracer, and it was used for the investigation of the leaching process. During the experiments, various processes applying leaching media such as sulphuric acid, nitric acid, and organic acids were investigated. The recovery of the metals using sulphuric acid was insufficient, around 10%. Investigated organic media also did not meet expectations. The best results were obtained in experiments with nitric acid. Up to 90% of Cu and other metals were extracted from the copper ore. Copper concentration calculations obtained by NAA were confimed by inductively coupled plasma mass spectrometry (ICP-MS) technique. Both techniques gave comparable results, but the advantage of the NAA is a possibility for easy online measurements without shutting down or disturbing the system.

Źródło:

Nukleonika; 2018, 63, 4; 123-129
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

A geological interpretation of geophysical self-potential anomalies in the Radzimowice Ore District, Sudetes, South-Western Poland

Autorzy:

Sobotka, J.
Farbisz-Michałek, M.

Powiązania:

https://bibliotekanauki.pl/articles/184543.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Radzimowice ore district
self-potential method
SP anomalies
graphite body
prospecting of ore deposits

Opis:

The analysis of the geophysical surveys results carried out in the Radzimowice area reveals that the anomalous zones of significant SP (self-potential) anomalies of natural SP fields do not substantially find a reflection in existing geological papers. Confrontation of existing geological elaborations with the results of SP analysis shows that the selfpotential studies expose significant elements of geological setting – i.e. run of faults, lithological boundaries, occurrence of ore mineralization – which can be helpful in clarifying the geological setting of the area. In the study, archived self-potential data were used and additionally new SP measurements were executed to justify their treatment as a valuable source of information.

Źródło:

Geology, Geophysics and Environment; 2016, 42, 4; 475-486
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Geochemistry indices and biotests as useful tools in the assessment of the degree of sediment contamination by metals

Autorzy:

Koniarz, Tomasz
Tarnawski, Marek
Baran, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/2202856.pdf

Data publikacji:

2023

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

metals
bottom sediments
zinc ore mining area
lead ore mining area
ecotoxicity
risk assessment

Opis:

Ecological and geochemical indicators have been widely accepted as tools with the potential for rapid risk assessment of metal contamination of bottom sediments. In this study we propose a selection of such indicators to characterize the potential ecological risks stemming from metal contamination of the bottom sediments of the Chechło reservoir (S Poland). The Chechło reservoir is located in an area formerly occupied by zinc and lead ore mining and processing industry. High amounts of metals, especially zinc (39.37–4772.00 mg/kg d.m.), cadmium (0.37–21.13 mg/kg d.m.) and lead (4.50–434.49 mg/kg d.m.) have been found in the bottom sediments. Both geochemical (CD – contamination degree) and ecological indices (mean PECQ) were indicative of bottom sediment contamination and their potential toxicity to living organisms. Most of the bottom sediment samples (71%) examined were toxic for Heterocypris incongruens, while only 9% of the samples were toxic to Sinapis alba. However, no significant correlations between the metal content and the response of the test organisms were observed. Correlation and principal component analyses (PCA) showed that silt and clay fractions were the key factors influencing the metal content in the sediments. Our study makes a contribution to building evidence of the need to integrate several indices for the assessment of environmental risks related to the presence of metals in bottom sediments rather than relying on a single one.

Źródło:

Geology, Geophysics and Environment; 2023, 49, 1; 5--18
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Smart ore tracking system using soft sensor technology
Inteligentny system „śledzenia” rudy za pomocą technologii sensorowej

Autorzy:

Pan, X.

Powiązania:

https://bibliotekanauki.pl/articles/348555.pdf

Data publikacji:

2012

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

śledzenie rudy
monitoring typu rudy
pomiar procesu
sensor
ore tracking
ore type soft sensor
ore type monitoring
process modeling
process measurement
soft sensor

Opis:

The relationship between ore mineralogy and downstream processing is well known in the mining industry. In fact, the very definition of a mineral deposit as an ore body depends on its susceptibility to processing in an economical manner. With an ore tracking system, the information about each ore block, gained during exploration and mining, could be used as input data to the mineral processing operation. This would allow the real-time optimization and control of the ore processing. A smart ore tracking system can be developed by using soft sensor technique. The ore tracking system utilizes the real time information available in both SCADA and database of a mine. Using the ore geological data and the tonnage of ore being treated, the ore tracking system calculates and provides ore type information such as ore mixing percentage, ore grade and ore hardness and density. The ore type information provided by the ore tracking system can be made available at all process units at a mine, including primary crusher, primary stock pile, primary scrubbers, secondary scrubbers, secondary crushers, re-crusher stock pile, dense media separation stock piles, dense media separation feeders, and the feed to next processing plant. The smart ore tracking system, developed originally for a diamond mine, can be used for other mines, such as iron ore, coal, chromite ore, manganese ore, etc.
Zależność pomiędzy mineralogią rudy a przeróbką jest bardzo dobrze znana w przemyśle górniczym. W rzeczywistości, definicja złoża mineralnego jako rudy zależy od jego podatności na procesy przeróbcze z punktu widzenia ekonomii. Przy zastosowaniu systemu "śledzenia" rudy informacja o każdym bloku rudy jest uzyskiwana podczas procesu wydobycia i obróbki górniczej. Może być ona zastosowana jako dane wejściowe do operacji przeróbki surowców mineralnych. Pozwoli to na optymalizację w czasie rzeczywistym i kontrolę procesów przeróbczych. Inteligentny system "śledzenia" rudy można uzyskać za pomocą techniki sensorowej. System ten korzysta z informacji w czasie rzeczywistym dostępnych zarówno w SCADA jak i bazie danych kopalni. Przy zastosowaniu danych geologicznych i informacji na temat ilości przerabianej rudy system oblicza i przewiduje informacje nt. rudy, tj. procent mieszania rudy, stopień rozdrobnienia, twardość, czy gęstość. Informacje te mogą stanowić bazę dla każdego procesu przeróbczego w kopalni, wliczając pierwsze kruszenie, pierwsze składowanie, pierwsze sortowanie, drugie kruszenie, drugie sortowanie, powtórne kruszenie, rozdział w cieczach ciężkich itp. System "śledzenia" rudy, wynaleziony pierwotnie dla kopalni diamentów może zostać zastosowany w innych kopalniach, tj. kopalnia żelaza, węgla, chromu, manganu itp.

Źródło:

AGH Journal of Mining and Geoengineering; 2012, 36, 4; 133-141
1732-6702

Pojawia się w:

AGH Journal of Mining and Geoengineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:

Influence of type of lining in high-pressure grinding rolls on effectiveness of copper ore comminution

Autorzy:

Saramak, D.
Foszcz, D.
Gawenda, T.
Konieczny, A.
Pawlos, W.

Powiązania:

https://bibliotekanauki.pl/articles/110528.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

HPGR
comminution
copper ore
high-pressure grinding rolls device
HPGR linings
ore processing
energy consumption

Opis:

Comminution in a High-Pressure Grinding Rolls (HPGR) device is considered as one of the most efficient method to break particles, in terms of the energy utilization. Two main types of the rolls linings are applied in hard ore grinding: studded and hexagonal, which show varied characteristics of operation and have different lifetime of service. The article concerns the analysis of HPGR device operation for various linings of the rolls. Two pilot-scale test programmes were run and performance of both types of rolls was tested in terms of energy consumption, technological effects measured by means of comminution ratio, lifetime service as well as economic aspects. Results of investigation show, that much longer lifetime service was obtained for the studded rolls, while hexagonal ones are more favourable from economic scope. The feed material for the HPGR comminution tests was Polish copper ore from two divisions of processing plants of KGHM Polska Miedz S.A. Taking into account that industrial comminution operations in mining and mineral processing sector consume over 50% of total energy utilized for ore treatment operations, the problem is of a major significance, especially in terms of optimization of hard ore crushing and grinding circuits.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 1; 182-192
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:

Determination of the nip zone angle in high-pressure grinding rolls

Autorzy:

Saramak, D.
Naziemiec, Z.

Powiązania:

https://bibliotekanauki.pl/articles/109355.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

HPGR
comminution
nip zone
ore processing

Opis:

A proposal of the nip zone angle determination in high-pressure grinding rolls (HPGR) crush-ing process is presented in the paper. Knowledge of the nip zone angle value makes it possible to deter-mine the real maximum pressing force in the high-pressure comminution. Two methods of determination of this maximum pressure were proposed and verified. The first method is based on the roll’s geometry and the change of the HPGR chamber’s volume together with the roll rotation, while the second one considers the outlet gap width. Results of the nip zone angle calculations according to both methods are similar and show that the nip zone angle is around 3o. The verification was carried out in a piston-die press and experimental results show that the product size distributions from HPGR and piston-die press are similar. The methodology of the nip zone angle determination presented in the paper has then its practical confirmation. A proper determination of the nip zone border makes it possible to calculate the comminution probability of given type of material and is a basis for the HPGR crushing process modeling and optimization.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 1; 243-253
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 16.

Tytuł:

In search of an efficient frother for pre-flotation of carbonaceous shale from the kupferschiefer stratiform copper ore

Autorzy:

Kowalczuk, P. B.
Buluc, B.
Sahbaz, O.
Drzymala, J.

Powiązania:

https://bibliotekanauki.pl/articles/109705.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

frother
pre-flotation
copper ore
shale

Opis:

This papers shows that frothers such as aliphatic alcohols (CnH2n+1OH), poly(propylene glycols) (HO(C3H6O)mH), poly(propylene glycol) alkyl ethers (CnH2n+1O(C3H6O)mH) and poly(ethylene glycol) alkyl ethers (CnH2n+1O(C2H4O)mH), can be used for collectorless flotation of a sample of carbonaceous copper shale manually separated from the Kupferschiefer stratiform copper ore. It was shown that flotation is influenced by the type and dose of frothers. The best flotation results were obtained with tri(propylene glycol) butyl ether C4P3, tri(propylene glycol) propyl ether C3P3 and tri(propylene glycol) P3. For these frothers, the yield vs. frother dose relationship was in the form of convex curves indicating that carbonaceous copper shale can float at relatively low dosages of the frother. It means that these frothers can be used for pre-flotation of carbonaceous matter from the investigated copper ore. Other frothers formed concave yield–frother dose relationships and were less effective.

Źródło:

Physicochemical Problems of Mineral Processing; 2014, 50, 2; 835-840
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 17.

Tytuł:

Synergistic effect of a mixture of dodecylamine and kerosene on separation of magnetite ore

Autorzy:

Liu, A.
Fan, M.-Q.
Li, Z.-H.

Powiązania:

https://bibliotekanauki.pl/articles/109849.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

DDA-kerosene
magnetite ore
quartz
flotation

Opis:

In this study, it was discovered that a mixture of dodecylamine (DDA)-kerosene demonstrated a stronger collecting ability for pure quartz and higher selectivity for magnetite ore. The relationship between the DDA-kerosene composition and mineral flotation performance on reverse flotation of magnetite ore was investigated. The results showed that floatability of the floating material increased when the DDA consumption increased. Specifically, during flotation, the fine particles (-0.074 mm fraction) selectively floated with DDA-kerosene. The difficult to float coarser particles (+0.074 mm fraction) with high content of quartz, required higher DDA dosage. However, higher DDA input during the flotation process did not necessarily yield better outcomes. The best results were obtained for 40/60 amine-to-oil ratio, as the quartz floated markedly with smaller magnetite loss and the flotation behavior was superior to pure DDA. Magnetite concentrates with 1.83% SiO2 and 71.04% Fe were produced using 120 g/Mg of DDA-kerosene (WDDA=40%).

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 647-661
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 18.

Tytuł:

Influence of Copper Ore Comminution in HPGR on Downstream Minerallurgical Processes

Autorzy:

Saramak, D.
Wasilewski, S.
Saramak, A.

Powiązania:

https://bibliotekanauki.pl/articles/351815.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

copper ore beneficiation
comminution
HPGR technology

Opis:

Crushing processes taking place in high-pressure grinding rolls devices (HPGR) are currently one of the most efficient methods of hard ore size reduction in terms of the energy consumption. The HPGR products are characterized by a fine particle size and the micro-cracks formation in individual particles, which appears in downstream grinding processes, decreasing their energy consumption. The purpose of the paper was to analyze the effectiveness of a ball mill grinding process and flotation operations depending on the changeable conditions of run of the HPGR crushing process. The research programme carried out included crushing tests in the laboratory scale HPGR device at various settings of the operating pressure volume and selected qualitative properties of the feed material (i.e. particle size distribution). On the basis of obtained results the models, defining the grinding process effectiveness as a function of changeable conditions of HPGR process run, were determined. Based on these models the optimal grinding time in a ball mill was specified which is, in turn, the basis for optimization of operation the technological comminution circuits for a given material type. The obtained results proved that the application of HPGR devices in given copper ore comminution circuit may improve the effectiveness of downstream grinding process what leads to improvement of the entire circuit work efficiency through decreasing the process energy consumption and enhancing the product size reduction.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 3; 1689-1694
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:

Cobalt-rich lithiophorite from the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India

Autorzy:

Rao, D. S.
Nayak, B. K.
Acharya, B. C.

Powiązania:

https://bibliotekanauki.pl/articles/2086547.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

Nishikhal
manganese ore
lithiophorite
mineral chemistry

Opis:

Fine-grained aggregates of lithiophorite are associated with cryptomelane, romanèchite, birnessite and graphite in the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India. High-cobalt lithiophorite is reported for the first time from the manganese ores. The mode of occurrence and the chemical composition of the lithiophorite are discussed. Along with manganese and aluminium, the lithiophorite contains appreciable quantities of CoO (1.59-8.56%) together with trace amounts of Cu, Ni, Zn, Ti, Ca, Mg, Na, K and P. The Nishikhal lithiophorite is a transition metal-rich lithiophorite.

Źródło:

Mineralogia; 2010, 41, 1/2; 11--21
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 20.

Tytuł:

Beneficiation of Artvin-Cerattepe copper-zinc ore by flotation

Autorzy:

Seyrankaya, Abdullah
Yontar, Uğur
Canbazoğlu, Mehmet
Özel, Gizem
Kabaloğlu, Sinan

Powiązania:

https://bibliotekanauki.pl/articles/24148596.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

copper
zinc
flotation
collector
refractory ore

Opis:

The Cerattepe (Artvin) mine contains volcanogenic massive sulfide (VMS) deposits in northeastern Turkey. This is a kuroko type deposit located in Late Cretaceous volcanic, intrusive and sedimentary rocks, and has a structure with dense alteration stages. In this study, batch flotation tests were carried out to determine the flotation behavior of a new sample (mix ore), that was the combination of two different ores with different flotation behaviors. The mixed ore contains 2.18% Cu, 1.46% Zn, (Cu/Zn ratio 1.49) 38.35% Fe, and 41.6% S content. An efficient separation of copper minerals from zinc minerals using the conventional selective flotation method could not be achieved due to complex mineralogy and very low liberation degree. Therefore, sequential selective flotation resulted in poor Cu recovery. The effects of flotation parameters such as collector type, collector amount, particle size, and pH conditions, were investigated to obtain a bulk copper-zinc concentrate. The best results were obtained using thionocarbamate (Aero 3894) and dithiophosphine (Aerophine 3418A) collector reagents at d80=40 μm particle size. Under optimal conditions (grain size, d80=40 μm, pH=11, amount of collector reagent 60 g/t (Aero 3894), frother (MIBC)=50 g/t, solid ratio=32%, flotation time=8 min.), a bulk copper-zinc concentrate containing 13% Cu and 9.5% Zn was obtained with a copper yield of 84.4% and a zinc yield of 88.9%. The concentrate mass pull was 13%. After rougher and two-stage scavenger flotation, a concentrate (rougher concentrate + scavenger products) was obtained with a mass pull of 22%. Copper and zinc recoveries of this concentrate were 91.8% and 92.5%, respectively.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 167499
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 21.

Tytuł:

Cobalt-rich lithiophorite from the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India

Autorzy:

Rao, Danda S.
Nayak, Bijaya K.
Acharya, Bhaskar C.

Powiązania:

https://bibliotekanauki.pl/articles/2086504.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

Nishikhal
manganese ore
lithiophorite
mineral chemistry

Opis:

Fine-grained aggregates of lithiophorite are associated with cryptomelane, romanèchite, birnessite and graphite in the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India. High-cobalt lithiophorite is reported for the first time from the manganese ores. The mode of occurrence and the chemical composition of the lithiophorite are discussed. Along with manganese and aluminium, the lithiophorite contains appreciable quantities of CoO (1.59-8.56%) together with trace amounts of Cu, Ni, Zn, Ti, Ca, Mg, Na, K and P. The Nishikhal lithiophorite is a transition metal-rich lithiophorite.

Źródło:

Mineralogia; 2010, 41, 1/2; 11--21
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:

The Rietveld refinement studies of pyromorphite-vanadinite and mimetite-vanadinite solid solution series

Autorzy:

Solecka, U.
Zelek, S.
Bajda, T.

Powiązania:

https://bibliotekanauki.pl/articles/184341.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

apatite supergroup
oxidation zone
ore deposit

Opis:

Mimetite Pb 5 (PO 4 ) 3 Cl, vanadinite Pb 5 (VO 4 ) 3 Cl and pyromorphite Pb 5 (PO 4 ) 3 Cl belong to the apatite supergroup. They form in oxidation zones of lead ore deposits. These minerals have high thermal stability (Dong et al. 2002) and low solubility (Flis et al. 2011) thus they have many applications. Pyromorphite and mimetite are especially used to immobilize lead in contaminated soils and hazardous industrial wastes (Ma et al. 1993, Kim et al. 2005, Bajda et al. 2007), it is therefore important to know the impact of various factors on their properties. Crystal structure of apatites corresponds to the general formula M 5 (TO 4 ) 3 X, where M are bi - valent cations distributed on two distinct crystallographic sites, TO 4 is a trivalent oxyanion and X is a monovalent anion. The structure and chemistry of apatite allow for numerous substitutions of metal cation and anionic complexes (Hughes & Rakovan 2002, Pan & Fleet 2002). It was found that substitutions cause variations in the unit cell parameters and chemical properties of these minerals (Botto et al. 1997), but there are no articles presenting variations in the whole series. Therefore, these researches present changes of lattice parameters for pyromorphite-vanadinite and mimetite-vanadinite solid solution series. Pyromorphite, mimetite and vanadinite crystallize in hexagonal symmetry (the space group P6 3 /m) (Dong et al. 2002, Pan & Fleet 2002). They form continuous isomorphic series. The aim of study was to examine how lattice parameters of pyromorphite-vanadinite and mimetite-vanadinite solid solutions series change with increasing vanadium content and characterize these pheno mena. Crystallographic studies were conducted on synthetic pyromorphite, mimetite and vanadinite and minerals with intermediate compositions Pb 5 (TO 4 ) 3 Cl, where T = P + V or As + V, of various P/V or As/V ratios. Samples were analyzed by X-Ray diffraction (XRD) using RIGAKU Smartlab X-Ray diffractometer with Cu radiation in a 10° to 110° 2Θ range at a step size of 0.02 2Θ and a rate of 2 s per step. The phase identification was carried out using the X’Rayan computer program and X-ray standard patterns in the form of ICDD files (card 19-0701, 19-0683 and 43-1461). The unit-cell refinement and Rietveld structure refinement were made using the FullProf Suite computer program package (Rodriguez-Carvajal 1993). The Rietveld refinement has shown systematic changes in unit cell parameters of studied samples depending on their chemical composition. Dimensions of unit cell parameters of pyromorphite-vanadinite solid solution series increase linearly with the substitution of vanadate ions in the structure of pyromorphite. Lattice parameter “a” increase in the range of 9.987–10.325 Å, while lattice parameter “c” increase in the range of 7.33–7.343 Å. In case of the mimetite-vanadinite solid solution series, lattice parameter “a” increase (10.251–10.325 Å range), whereas lattice parameter “c” decrease (7.442–7.343 Å range) linearly with the substitution of vanadate ions in the structure of mimetite. This situation indicates the equivalent position of the tetrahedral TO 4 in the structure of lead apatite.

Źródło:

Geology, Geophysics and Environment; 2016, 42, 1; 127-128
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:

Solvent extraction of copper(ii) from concentrated leach liquors

Autorzy:

Ochromowicz, K.
Chmielewski, T.

Powiązania:

https://bibliotekanauki.pl/articles/109873.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

copper ore
hydrometallurgy
separation
Acorga
LIX

Opis:

Hydrometallurgical treatment of complex copper sulfidic ores, by-products and concentrates requires aggressive, oxidative leaching methods and application of Fe(III) ions and oxygen or bacteria assisted environment. Leach liquors generated in the process are usually copper and iron-rich solutions of high acidity. Such conditions require the application of suitably strong and selective reagent to extract copper in SX operations. This paper discusses the copper extraction behavior of commercial copper rea-gents: LIX 984N, LIX 612N-LV and Acorga M5640. Aqueous feed solutions used in SX studies were PLS’ generated in atmospheric leaching of commercial flotation concentrate, produced at Lubin Concen-trator (KGHM). McCabe-Thiele diagrams were generated and copper net transfer values were compared and discussed. It was shown that stronger modified aldoxime reagents (Acorga, LIX 612) are superior over non-modified salicylaldoxime/ketoxime mixture (LIX 984N). Particularly, the ester modified Acor-ga M5640 showed advantages in recovery and copper net transfer values.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 1; 357-367
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 24.

Tytuł:

Pressure oxidation of pyrite-arsenopyrite refractory gold concentrate

Autorzy:

Rusanen, L.
Aromaa, J.
Forsen, O.

Powiązania:

https://bibliotekanauki.pl/articles/110051.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gold ore
hydrometallurgy
leaching
factorial design

Opis:

Refractory gold ores have poor gold recoveries with direct cyanide leaching. Typically the refractoriness is due to encapsulation of the gold particles inside the host mineral. To liberate gold for leaching the host mineral must be broken by mechanical or chemical means. The aim of this study was to study the effect of temperature, oxygen partial pressure and slurry density on pressure oxidation of pyrite-arsenopyrite gold concentrate. Batch oxidation tests in an autoclave were done using a factorial design. Different responses were measured and analysed to study effect of the three factors and oxidation kinet-ics. Generally, high slurry density required high temperature and oxygen partial pressure to reach com-plete oxidation. Oxidation kinetics at 225°C temperature, with 1050 kPa oxygen partial pressure and 15% slurry density was found to be fastest resulting in complete conversion of sulfides in 30 minutes. At 195°C, 700 kPa oxygen partial pressure and 10% slurry density, the oxidation kinetics for complete sul-fide conversion was about 60 minutes. Slurry densities above 10% had an adverse effect on the oxidation rate, when the temperature was below 225°C and oxygen partial pressure below 1050 kPa.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 1; 101-109
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Gold leching from a Saudi ore by the nonpolluting thiosulfate process

Autorzy:

Mahmoud, M. H. H.
Awad, H. M.
Elhabib, O. A.

Powiązania:

https://bibliotekanauki.pl/articles/110379.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gold
extraction
leaching
thiosulfate
Saudi ore

Opis:

In all working Saudi gold mines, ores are treated using the hazardous cyanidation process. Some Saudi gold ores, such as Al-Amar, is known to be refractory to cyanidation. In this work, we have examined the extraction of gold from Al-Amar gold ore by the much environmentally safer and efficient thiosulfate process. The run of mine (ROM) and carbon-in-leach (CIL) feed, that is obtained after separation of copper concentrate from ROM, samples were found to contain 6.5 and 3.6 ppm gold, respectively. The mineralogical microscopic investigations of ROM samples confirmed that fine gold specks were scattered and encapsulated inside sulfide or quartz base minerals. This could explain the expected reason of the difficult leaching of gold by cyanidation. The X-ray diffraction analysis showed that the CIL feed contained quartz, pyrite, sphalerite and chlorite minerals. After detailed leaching studies of CIL feed, almost 70% of gold could be extracted at 0.2 M ammonium thiosulfate and 0.3 M ammonium hydroxide after 24 h. Addition of copper(II) as <0.2 mM only slightly enhanced the gold leaching in the ammoniacal thiosulfate solution. Gold leaching drastically decreased as the concentration of copper(II) increased 0.2 mM due to the degradation of S2O3²¯.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 1; 59-72
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 26.

Tytuł:

Factors Affecting Ballability of Mixture Iron Ore Concentrates and Iron Oxide Bearing Wastes in Metallurgical Processing

Autorzy:

Udo, M. O.
Esezobor, D. E.
Apeh, F. I
Afolalu, A. S.

Powiązania:

https://bibliotekanauki.pl/articles/123037.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

ballabilty
bearing wastes
iron ore concentrates

Opis:

Iron oxide bearing wastes (IOBS) are produced at every part of processing stage of sinter, molten iron and steel production. They are hard to handle and in many cases are stockpiled only to be a source of environmental pollution. However, they can be balled into pellets. Pellets characterized by good ballability values are transportable and recyclable as they can withstand stress without disintegrating back to dust. Yet, ballability is affected by certain factors like the grain sizes of the materials, the moisture and binder contents of the ball mix, wettability of the balled materials and the processing perimeters of the granulator. The objective of this research work is to investigate the factors affecting ballability of mixture of iron ore concentrates and iron oxide bearing wastes in metallurgical processing. The parameters under consideration were: grain size of materials, the moisture contents, speed of balling disc, IOBS and bentonite (binder) contents of the balled mix. The investigation was carried out by balling different volume fractions of mix containing iron oxide concentrate and IOBS using a balling disc and testing the resulting balls for green compressive strength using an universal testing machine. It was found that the ballability of the mixture of iron ore concentrate and IOBS increases as grain sizes of the materials reduce but increases as the moisture contents and IOBS content increase up to an optimum value of moisture content in the mix before it starts to reduce. The ballability also increases along with the speed of the granulator (balling disc) within the limit of this work. An increase in ballability with a slight raise in bentonite content in the mix was observed as well.

Źródło:

Journal of Ecological Engineering; 2018, 19, 3; 235-242
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Basic Regularities of Assessing Ore Pulp Parameters in Gravity Settling of Solid Phase Particles Based on Ultrasonic Measurements

Autorzy:

Morkun, Vladimir
Morkun, Natalia
Tron, Vitaliy
Hryshchenko, Svitlana
Serdiuk, Oleksandra
Dotsenko, Iryna

Powiązania:

https://bibliotekanauki.pl/articles/178122.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

settling
ultrasound
pulp
ore
Lamb waves

Opis:

The article describes the method of controlling the recovered grade based on measuring the intensity of volume ultrasonic oscillations and Lamb waves covering a fixed distance through the test medium and on a metal plate contacting the test medium at various time points of deliberate motion of ground materials. The authors suggest a method of determining density of ground ore particles in the pulp periodically after isolating the pulp flow in the vertical part of the measuring vessel based on measuring attenuation change values in Lamb waves covering a fixed distance on a plate contacting the medium under study and high frequency volume ultrasonic oscillations that have come through it within a certain time period. There are given dependencies of amplitudes of measuring channels based on volume ultrasonic oscillations and surface Lamb waves, size distribution according to solid phase pulp particles for various types of ores under study, a set of curves for determining the recovered grade with regard to various types of ores under study.

Źródło:

Archives of Acoustics; 2019, 44, 1; 161-167
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Removal of magnesium from sphalerite concentrates by means of spent electrolyte deriving from the process of cathode zinc extraction
Usuwanie magnezu z koncentratu sfalerytowego za pomocą zużytego elektrolitu z procesu otrzymywania cynku katodowego

Autorzy:

Jarosiński, A.
Kozak, A.
Żelazny, S.
Radomski, P.

Powiązania:

https://bibliotekanauki.pl/articles/215817.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Tematy:

ruda cynku
ruda ołowiu
usuwanie magnezu
koncentrat sfalerytowy
zinc ore
lead ore
removal of magnesium
sphalerite concentrates

Opis:

Due to the occurrence of zinc and lead ore deposits in dolomite rocks, the sphalerite concentrates obtained from these ores contain an admixture of dolomite. In practice, a substantial amount of magnesium included in zinc ores passes to the last production stage, i.e. zinc electrolysis. The magnesium present in electrolyte impairs electrical conductance and appears in the technical and economical indexes. This paper deals the attempts to remove magnesium removal from initial sphalerite concentrates by means of chemical flotation using spent electrolyte derived from zinc electrolysis. The authors attempt to substantiate the existing relationships, as well as to derermine the optimum conditions for the procedure suggested. The leaching efficiency of magnesium amounted to about 80%, and is dependent upon the stage of the leaching. Losses of zinc were below 2%, and the magnesium concentration in solution amounted to about 20%. These solution can produce magnesium and zinc, which will be presented in the following paper.
Występowanie złóż rud cynku i ołowiu w skałach dolomitowych sprawia, że otrzymane koncentraty sfalerytowe zawierają domieszkę dolomitu. Praktyka wskazuje, że znaczna część wprowadzanego magnezu z surowcami cynkowymi przechodzi do ostatniej fazy produkcji, elektrolizy cynku. Obecność magnezu w elektrolicie obniża przewodnictwo elektryczne elektrolitu i powoduje pogorszenie wskaźników techniczno-ekonomicznych. Celem opisanych w tym artykule badań było opracowanie metody usuwania magnezu z surowego koncentratu sfalerytowego na drodze chemiczno-flotacyjnej, stosując zużyty elektrolit pochodzący z elektrolizy cynku. Opracowanie ukierunkowano wokół doświadczalnego zobrazowania istniejących zależności i ustalenia optymalnych warunków zaproponowanej procedury. Stopień wyługowania magnezu wynosił około 80%. Straty cynku wynosiły poniżej 2%, natomiast stężenie magnezu w roztworze wynosiło 20%. Z tych roztworów można odzyskiwać magnez i cynk, co będzie przedstawione w następnej publikacji.

Źródło:

Gospodarka Surowcami Mineralnymi; 2012, 28, 3; 43-53
0860-0953

Pojawia się w:

Gospodarka Surowcami Mineralnymi

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Wpływ antropopresji na środowisko wodne obszaru Zespołu Przyrodniczo-Krajobrazowego Żabie Doły (Górny Śląsk)
The influence of anthropopression on the water environment in the area of Landscape-Nature Protected Complex "Żabie Doły" (Upper Silesia)

Autorzy:

Nowak, J.
Lutyńska, S.

Powiązania:

https://bibliotekanauki.pl/articles/357617.pdf

Data publikacji:

2015

Wydawca:

Politechnika Śląska

Tematy:

zanieczyszczenie wód
antropopresja
złoża rud cynku
złoża ołowiu
Żabie Doły
water contamination
anthropopression
lead ore
zinc ore

Opis:

W artykule określono stopień zanieczyszczenia zbiorników wodnych oraz cieków zlokalizowanych na obszarze Zespołu Krajobrazowo-Przyrodniczego Żabie Doły. W wyniku m.in. długotrwałej eksploatacji złóż cynkowo-ołowiowych oraz współczesnej działalności zakładu Orzeł Biały S.A. ukształtował się obecny chemizm wód. Przeprowadzona analiza fizykochemiczna wód wskazała na wysoki stopień antropopresji. W części analizowanych zbiorników i cieków odnotowano skrajnie kwaśny odczyn wód oraz ponadnormatywne wysokie stężenia siarczanów oraz metali m.in. cynku, ołowiu, żelaza i kadmu.
In this paper the contamination degree of water from reservoirs and streams located in the area of Landscape-Nature Protected Complex "Żabie Doły” was determined. Contemporary water chemistry was formed as a result of long-term exploitation of zinc and lead ores and the current activity of the Orzeł Bialy SA company. The physicochemical analysis of water indicated a high degree of anthropopression. In the part of analyzed reservoirs and streams extremely low pH value of water and elevated concentrations of sulfates and metals such as zinc, lead, iron and cadmium were observed.

Źródło:

Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2015, 17, 2; 11-18
1733-4381

Pojawia się w:

Archiwum Gospodarki Odpadami i Ochrony Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

A preliminary study on enrichment of Anini iron ore for use by Algerian metallurgical industry

Autorzy:

Chaabia, R.
Bounouala, M.
Boukelloul, M. L.

Powiązania:

https://bibliotekanauki.pl/articles/88999.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

enrichment
iron ore
desliming
basicity index
metallurgy

Opis:

The Anini iron ore contains mainly ferriferous hematite rocks with inclusions of quartz and clay. The chemical analysis showed that the average content of iron is 55% while SiO2 and Al2O3 is 26.20% and 12%, respectively. The XRD mineralogical analysis confirmed that the prevailing mineral phase are hematite, quartz, clay and some inclusions of calcite in this matrix. According to the tests, preliminary desliming by washing provides iron 62% is the concentrate while SiO2 decreases from 26.20% to 2.30% and Al2O3from 12% to 3%. The calculated partial basicity index Ip= (CaO/SiO2) was 1.07, meaning that the washed-out ore achieves standards to be used in metallurgy. The by-products remaining after washing (quartz, clay and a small content of iron) can be used in cement production.

Źródło:

Mining Science; 2015, 22; 201-213
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Polymetallic mineralization in Ediacaran sediments in the Żarki-Kotowice area, Poland

Autorzy:

Karwowski, Łukasz
Markowiak, Marek

Powiązania:

https://bibliotekanauki.pl/articles/2086483.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

Małopolska Block
ore mineralization
cobaltite
nickeline
wolframite

Opis:

In one small mineral vein in core from borehole 144-Ż in the Żarki-Kotowice area, almost all of the ore minerals known from related deposits in the vicinity occur. Some of the minerals in the vein described in this paper, namely, nickeline, hessite, native silver and minerals of the cobaltite-gersdorffite group, have not previously been reported from elsewhere in the Kraków-Lubliniec tectonic zone. The identified minerals are chalcopyrite, pyrite, marcasite, sphalerite, Co-rich pyrite, tennantite, tetrahedrite, bornite, galena, magnetite, hematite, cassiterite, pyrrhotite, wolframite (ferberite), scheelite, molybdenite, nickeline, minerals of the cobaltitegersdorffite group, carrollite, hessite and native silver. Moreover, native bismuth, bismuthinite, a Cu- and Ag-rich sulfosalt of Bi (cuprobismutite) and Ni-rich pyrite also occur in the vein. We suggest that, the ore mineralization from the borehole probably reflects post-magmatic hydrothermal activity related to an unseen granitic intrusion located under the Mesozoic sediments in the Żarki-Pilica area.

Źródło:

Mineralogia; 2012, 43, 3/4; 199--212
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa Monocline

Autorzy:

Pieczonka, Jadwiga

Powiązania:

https://bibliotekanauki.pl/articles/2086516.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

copper mineralization
Bunter
Upper Silesian ore district

Opis:

A new association of ore minerals has been found in the Lower and Middle Triassic rocks in the vicinity of the village of Woźniki in the NW part of the Upper Silesian district. In addition to the typical Zn-Pb-Fe association in dolomites, copper sulphides have been detected in the sandstones and conglomerates of the Lower Bunter. Copper mineralization occurs in the sandstone matrix and is represented by bornite, chalcopyrite, chalcocite, tetrahedrite and covellite. High admixtures of zinc in Cu sulphides and admixtures of copper in Zn-Pb sulphides suggest a common source for the metal-transporting fluids and a single period of sulphide crystallization.

Źródło:

Mineralogia; 2010, 41, 1/2; 33--53
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 33.

Tytuł:

Polymetallic mineralization in Ediacaran sediments in the Żarki-Kotowice area, Poland

Autorzy:

Karwowski, Ł.
Markowiak, M.

Powiązania:

https://bibliotekanauki.pl/articles/2086528.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

Małopolska Block
ore mineralization
cobaltite
nickeline
wolframite

Opis:

In one small mineral vein in core from borehole 144-Ż in the Żarki-Kotowice area, almost all of the ore minerals known from related deposits in the vicinity occur. Some of the minerals in the vein described in this paper, namely, nickeline, hessite, native silver and minerals of the cobaltite-gersdorffite group, have not previously been reported from elsewhere in the Kraków-Lubliniec tectonic zone. The identified minerals are chalcopyrite, pyrite, marcasite, sphalerite, Co-rich pyrite, tennantite, tetrahedrite, bornite, galena, magnetite, hematite, cassiterite, pyrrhotite, wolframite (ferberite), scheelite, molybdenite, nickeline, minerals of the cobaltitegersdorffite group, carrollite, hessite and native silver. Moreover, native bismuth, bismuthinite, a Cu- and Ag-rich sulfosalt of Bi (cuprobismutite) and Ni-rich pyrite also occur in the vein. We suggest that, the ore mineralization from the borehole probably reflects post-magmatic hydrothermal activity related to an unseen granitic intrusion located under the Mesozoic sediments in the Żarki-Pilica area.

Źródło:

Mineralogia; 2012, 43, 3/4; 199--212
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa Monocline

Autorzy:

Pieczonka, J.

Powiązania:

https://bibliotekanauki.pl/articles/2086548.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

copper mineralization
Bunter
Upper Silesian ore district

Opis:

A new association of ore minerals has been found in the Lower and Middle Triassic rocks in the vicinity of the village of Woźniki in the NW part of the Upper Silesian district. In addition to the typical Zn-Pb-Fe association in dolomites, copper sulphides have been detected in the sandstones and conglomerates of the Lower Bunter. Copper mineralization occurs in the sandstone matrix and is represented by bornite, chalcopyrite, chalcocite, tetrahedrite and covellite. High admixtures of zinc in Cu sulphides and admixtures of copper in Zn-Pb sulphides suggest a common source for the metal-transporting fluids and a single period of sulphide crystallization.

Źródło:

Mineralogia; 2010, 41, 1/2; 33--53
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Environment and Risks of Iron Production

Autorzy:

Besta, Petr
Kozel, Roman
Janovská, Kamila
Vilamová, Šárka
Foltan, Drahomir
Piecha, Marian

Powiązania:

https://bibliotekanauki.pl/articles/1811546.pdf

Data publikacji:

2020

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

environment
iron
ore sintering
blast furnace
cost

Opis:

Iron production is one of the production processes that create a large number of negative externalities towards their surroundings. Iron production is based on the use of a wide range of production operations, which include not only the blast furnace process but also the treatment and processing of ores, sintering, pelletizing and processing of metallurgical waste and its possible storage. All parts of the blast furnace process can have a negative impact on the environment. Within the individual parts of the blast furnace plant, a number of pollutants are produced which negatively affect the environment. They can have both solid and gaseous states. In the case of solid emissions, it is airborne dust, and the gaseous form represents pollutants in the form of sulphur, nitrogen or carbon oxides. From the point of view of the blast furnace plant structure itself, blast furnace, agglomeration processes, palletization processes or the processing of waste from production can be classified as emission points. The article deals with the classification of basic impacts of blast furnace production on the environment. It analyses in detail the negative externalities in ore sintering. It also deals with the analysis of research, which was focused on the degree of reduction of iron oxides ore. The efficiency of the reduction process is crucial in terms of resource use, but also the overall amount of negative externalities. The research was carried out in the environment of a selected iron producer in the Czech Republic.

Źródło:

Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 181-195
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Accuracy of separation parameters resulting from errors of chemical analysis, experimental results and data approximation

Autorzy:

Foszcz, D.
Duchnowska, M.
Niedoba, T.
Tumidajski, T.

Powiązania:

https://bibliotekanauki.pl/articles/109371.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

upgrading curve
approximation
copper ore
flotation
selectivity

Opis:

Accuracy of determination of different separation parameters and selectivity indicators depends on the error of chemical analysis of feed and separation products as well as experimental and approximation errors. In this paper different selectivity parameters were considered which formulae was based on the content of useful component in the feed, concentrate and tailing. It was shown that the impact of chemical analysis on the selectivity parameters was small and the error determined by means of partial derivative approach for a copper ore upgraded by flotation was negligible. Also experimental errors were found to be insignificant. The largest errors occurred for approximation of the upgrading data with inadequately selected selectivity indicators.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 1; 98-111
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Role of sodium hexametaphosphate in flotation of a nickel ore

Autorzy:

Feng, B.
Wang, P.
Lu, Y.
Feng, Q.

Powiązania:

https://bibliotekanauki.pl/articles/109887.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

nickel ore
lizardite
flotation
concentration process
pentlandite

Opis:

In this work, a role of sodium hexametaphosphate (SHMP) in the flotation performance of a nickel ore was studied and mechanism was discussed in detail. The results showed that the presence of lizardite interferes with the flotation performance of pentlandite. The adsorption of SHMP at the lizardite/solution interface and the removal of magnesium ions from lizardite surface overcompensated the positive charge on the lizardite particle, and made its zeta potential negative. The interaction between lizardite and pentlandite changed from attractive to repulsive in the presence of SHMP. Thus, the addition of SHMP made the mixed sample of pentlandite and lizardite more dispersed, and significantly reduced the adverse effect of lizardite on the flotation of pentlandite. However, when the content of lizardite in the mixed ore was increased, the effect of SHMP weakened. Therefore, in flotation of a nickel ore containing a large amount of lizardite (46% w/w), SHMP usage is not suitable at the roughing stage due to the fact that lizardite in the pulp will consume most of the SHMP, and hence the removal of lizardite slimes from pentlandite surface become impossible. Based upon the results, SHMP usage is found to be suitable at the cleaning stage to improve the grade of concentrate.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 1; 170-181
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Mathematical models of particle size distribution in simulation analysis of high-pressure grinding roll operations

Autorzy:

Saramak, D.

Powiązania:

https://bibliotekanauki.pl/articles/110253.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

HPGR
comminution
particle size distribution
ore processing

Opis:

The high-pressure grinding roll (HPGR) technology is currently one of the most efficient methods of hard ore comminution from the scope of the energy consumption. Throughput and energetic models of performance are quite well developed, but technological models predicting the comminution effects still needs an in-depth research. In the paper author presents the method of modeling of HPGR products’ particle size distribution by using suitable mathematical models. A basis of the HPGR perfor-mance assessment and HPGR-based crushing circuits design is a product’s particle size distribution. In order to precisely determine the particle size distribution of a HPGR product, parameters of product’s particle size distributions should be conditional on the main technical parameters of the roller press like operating pressure and the speed of rolls. The most accurate approximation of a distribution of size parti-cle appears to be Weibull’s truncated distribution and it is possible to obtain significant relationships between the approximation formula and the value of operating pressure, or feed characteristics. It makes possible a determination of mass recoveries of the product’s respective size fractions and the productivity planning. Instead of pressure, the other HPGR operating parameters can be applied, but the pressure value appears to produce the most relevant relationship. A determination of HPGR product’s particle size dis-tribution is a basis of the press operation simulation analysis.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 1; 121-131
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Copper(II) extraction from ammonia leach solution

Autorzy:

Ochromowicz, K.
Jeziorek, M
Wejman, K.

Powiązania:

https://bibliotekanauki.pl/articles/110345.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

hydrometallurgy
hydroxyoximes
LIX
copper ore
copper concentrate

Opis:

Hydrometallurgical processing of copper-bearing materials (ores, concentrates, by-products) is usually done with the use of acidic or ammonia leaching. In the case where a leaching feed material contains significant amounts of carbonate rocks and iron minerals the second method is preferential due to a higher process selectivity. However, it can also be problematic considering possible ammonia transfer during the subsequent extraction process. The paper presents results of extraction of copper(II) from ammonia leach solutions. The effect of a type of extractant, its concentration and type of diluent in organic phase on extraction efficiency and ammonia transfer was studied. A few commercial extractants were examined, namely LIX 84-I, LIX 984N, LIX 54-100. The results clearly indicate that in the case of extraction systems using hydroxyoximes the extraction efficiency is remarkably higher than for βdiketone reagent. Presented studies proved that extraction efficiency of Cu(II) is also dependent on the type of diluent and is less favourable for systems with non-aliphatic diluents. It was observed that ammonia co-extraction occurs and depends on examined parameters. Scrubbing of loaded organic phase showed that ammonia can be removed almost completely using double wash with sulfuric acid solution.

Źródło:

Physicochemical Problems of Mineral Processing; 2014, 50, 1; 327-335
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Atmospheric pressure leaching of nickel from a low-grade nickel-bearing ore

Autorzy:

Javanshir, S.
Mofrad, Z. H.
Azargoon, A.

Powiązania:

https://bibliotekanauki.pl/articles/110534.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

leaching
kinetics
calcination
laterite ore
nickel recovery

Opis:

This study focused on the extraction of nickel from a low-grade lateritic ore. The characterization of representative samples was done by X-ray diffraction (XRD), X-ray fluorescence (XRF), and microscopic mineralogical studies. Nickel was uniformly distributed in iron (hydr)oxide minerals. The pre-concentration of nickel was attempted by magnetic separation, but was unsuccessful. The effect of the type of lixiviant, acid concentration, S/L ratio, time, and temperature were investigated in the atmospheric leaching process. Based on the experimental data, optimum conditions for the maximum recovery of nickel were determined under the following conditions: 5 M H₂SO₄, 25% (w/v), 90 ºC, and two hours. Pre-calcination, for increasing nickel extraction by converting goethite to hematite, was carried out on raw ores at different times (30-180 minutes) and temperatures (180-540 ºC). Recovery was found increasing from 69 to 95% under the same conditions. Kinetic studies were conducted by fitting the data with Shrinking Core (SC) models. The study determined, from the estimate of activation energy, that the rate of reaction controlled by chemical reaction.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 890-900
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Leaching of zinc from low grade oxide ore using organic acid

Autorzy:

Irannajad, M.
Meshkini, M.
Azadmehr, A. R.

Powiązania:

https://bibliotekanauki.pl/articles/110892.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

leaching
zinc oxide ore
citric acid
smithsonite

Opis:

The leaching of low grade zinc oxide mining tailings by organic acid as a leaching agent was investigated. Zinc was extracted successfully from sample by citric acid leaching. The effects of solid-to- liquid ratio, acid concentration, reaction time, temperature and ore particle size on the leaching efficiency were studied. The results obtained showed that particle sizes and reaction time had not any significant effect on the leaching recovery of zinc from smithsonite in the sizes range of 40-350 μm. Under conditions: temperature of 80ºC, reaction time of 60 min, citric acid concentration of 0.5 mol/L, and solid to liquid ratio of 1:10, 82% of zinc could be recovered.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 547-555
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Physicochemical study and application for pyrolusite separation from high manganese-iron ore in the presence of microorganisms

Autorzy:

Farghaly, Mohamed Galal
Abdel-Khalek, Nagui Aly
Abdel-Khalek, Mohamed Abdel-Dayem
Selim, Khaled Abdelaal
Abdullah, Samah Saleh

Powiązania:

https://bibliotekanauki.pl/articles/1448933.pdf

Data publikacji:

2021

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

iron ore
bioflotation
pyrolusite
hematite
Paenibacillus polymyxa

Opis:

Paenibacillus polymyxa bacteria strain as a surface modifier in a flotation process could remove 64.89% of $MnO_2$ from high manganese iron ore. A concentrate containing 3.7% $MnO_2$, 0.5% $SiO_2$ and 71.30% $Fe_2O_3$, with a hematite recovery of 72.46% is produced from a feed containing 8.79% $MnO_2$, 0.49% $SiO_2$ and 67.90% $Fe_2O_3$. The bio-flotation results indicated that such type of bacteria is selective for upgrading El-Gedida iron ore from the Western Desert of Egypt. The role of Paenibacillus polymyxa on the surface properties of pyrolusite and hematite single minerals was investigated through zeta potential, FTIR and adsorption measurements.

Źródło:

Physicochemical Problems of Mineral Processing; 2021, 57, 1; 273-283
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Development of an Engineer Operation Aimed at the Reduction of Atmospheric Dust Pollution in the Decommissioning of Iron-Ore Treatment Waste

Autorzy:

Suprun, Igor
Kuznetsov, Vladimir S.
Ivanov, Andrey V.

Powiązania:

https://bibliotekanauki.pl/articles/123979.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

reduction
dust pollution
decommissioning
iron-ore waste

Opis:

This work covers the pollution of the atmosphere during the work of the Mikhailovsky Mining and Refining Facility which is located within 100 km from the city of Kursk, in the city of Zheleznogorsk. Over the past few years in the whole world, the anthropogenic activity, connected mainly with the locations of mineral production and those of mineral treatment and processing, has become increasingly dangerous for the natural environment. Resource development in open pits causes the formation of inorganic dust. The dust is released into the atmosphere at all stages of the enterprise’s technical process. The principal sources generating inorganic dust during open mining of iron deposits include: blasting operations in an open pit, the work of transfer points, the enrichment process at a factory, pellet firing as well as dusting from the surfaces of stock dumps and dry tailings beaches.

Źródło:

Journal of Ecological Engineering; 2019, 20, 4; 23-28
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Electromagnetic investigations by the VLF method of the ore-bearing veins in the Hornsund Fiord area

Autorzy:

Antoniuk, Janusz

Powiązania:

https://bibliotekanauki.pl/articles/2057330.pdf

Data publikacji:

1985

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Arctic
Spitsbergen
localization of ore-bearing veins

Źródło:

Polish Polar Research; 1985, 6, 3; 349-356
0138-0338
2081-8262

Pojawia się w:

Polish Polar Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Coupling mineralogy with physicochemical parameters in view copper flotation efficiency improvement

Autorzy:

Naumov, Dejan
Stamenov, Lachezar
Gaydardzhiev, Stoyan
Bouzahzah, Hassan

Powiązania:

https://bibliotekanauki.pl/articles/109556.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

copper ore
flotation
quantitative mineralogy
physicochemical factors

Opis:

The Chelopech epithermal arsenic bearing high-sulphidation, copper-gold deposit located in Bulgaria is often considered as the richest European gold deposit. Selected physicochemical parameters have been measured at key flotation streams inside the processing plant. Sampling campaign has followed with samples being submitted to chemical and mineral liberation analyses. A quantitative analysis has enabled to link copper flotation response to the type of copper bearing minerals and physiochemical parameters such as redox potential (Eh), dissolved oxygen (DO), EDTA extractable Cu and Fe. Data from the mineral liberation analysis (MLA) have highlighted an important process- relevant information explaining the variable floatability in different particle size ranges. A low chalcopyrite recovery can be linked to the non-sufficient amount of dissolved oxygen inside the copper selective flotation. Given the finely-disseminated copper bearing minerals, copper losses due to particle locking could be suggested as well.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 3; 701-710
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Froth stabilisation using nanoparticles in mineral flotation

Autorzy:

Cilek, E. C.
Uysal, K.

Powiązania:

https://bibliotekanauki.pl/articles/109599.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

nanoparticles
bubble size
sulphide ore
flotation froths

Opis:

In this study, three kinds of nanoparticles (SiO₂, Fe₂O₃, and Al₂O₃) were used in the flotation of a sulphide ore to investigate the effects of nanoparticles on the froth stability and the flotation performance. The dynamic froth stability factor and the maximum froth depth were measured by using a non-overflowing flotation cell under various flotation conditions. The results were also related to the separation selectivity and efficiency of the flotation. The experimental results showed that the dynamic froth stability factor and the maximum froth depth can be increased 1.2-2 fold by using the Al₂O₃ nanoparticles. These increments led to significant improve in the froth recovery. In terms of the froth stability and the flotation performance, the Al₂O₃ nanomaterial was the best, followed by Fe₂O₃ and SiO₂. In addition, the flotation recovery increased from 83 to 91%, and the grade of the concentrate increased from 44 to 60% by using the Al₂O₃ nanoparticles.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 878-889
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Field monitoring and performance evaluation of crushing plant operation

Autorzy:

Yilmaz, E.

Powiązania:

https://bibliotekanauki.pl/articles/109889.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

crushing
monitoring
equipment
ore characteristics
operator
performance

Opis:

Crushing plants are of great interest in reducing a particle size of rocks and ores as milling operations need to consider sustainable development. Since the crushing plants operate under harsh conditions and involve very abrasive material, multiple factors can influence their performance. This paper assesses a number of factors affecting the performance of the crushing plant by addressing the critical design parameters and consideration of ore characteristics, operability and maintainability. Due to the fact that ore properties remain the same during milling, its control may become difficult for yield and quality of a product. However, an operation factor can contribute positively to the performance if it is well managed by experienced operators. The present paper also considers the operational, instrumental, mechanical and maintenance aspects of crushing plant, focusing on the capacity and quality.

Źródło:

Physicochemical Problems of Mineral Processing; 2014, 50, 2; 615-630
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Removal of sulfur and phosphorous from iron ore concentrate by leaching

Autorzy:

Rezvani Pour, H.
Mostafavi, A.
Shams Pur, T.
Ebadi Pour, G.
Haji Zadeh Omran, A.

Powiązania:

https://bibliotekanauki.pl/articles/110072.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

sulfur removal
chemical leaching
iron ore concentrate

Opis:

Iron ore having high-sulfur content causes problems in the concentrate production, pelletizing, and steel-making processes and environmental issues such as sulfur dioxide emission during the concentrate pelletizing process, and effect on steel quality. The current study was focused on the removal of sulfur from iron ore concentrate using chemical leaching technique. Magnetite iron ore concentrate was chosen for this purpose. The results obtained from the study showed that more than 90% of the total sulfur content was removed from the iron ore concentrate by the chemical leaching. Effects of several parameters, including temperature, stirring speed, particle size, and use of organic solvent on the sulfur removal was investigated by a series of experimental conditions. After optimizing the experimental conditions, it was demonstrated that in addition to sulfur, more than 80% of phosphorus, another important impurity, was also removed from the iron ore concentrate. In addition, one of the major advantages of our proposed method was the transformation of mineral pyrites to useful byproducts such as elemental sulfur.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 845-854
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Study on the mechanism and kinetics of sulfuric acid leaching scandium from rich scandium anatase

Autorzy:

He, Fei
Gao, Likun
Chen, Long
Rao, Bing
Shen, Hairong
Peng, Kebo
Gao, Guangyan

Powiązania:

https://bibliotekanauki.pl/articles/2146896.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

anatase ore
sulfuric acid
leaching
kinetics
scandium

Opis:

Scandium and its compounds have excellent properties, and are widely used in cutting-edge fields such as optics, electronics, and alloys. Thus, scandium is an important strategic metal. However, scandium is extremely sparsely distributed in the earth's crust, rarely occurs as an independent mineral, and requires a complex recovery process. Therefore, the study of the extraction of scandium is of great practical significance. This study examined the leaching test and kinetics of scandium under the acid leaching system of refractory anatase ore. Under appropriate two-stage countercurrent leaching conditions, the first stage of the particle size of fraction of -0.074 mm 82.6%, initial H2SO4 concentration of 6 mol/L, leaching temperature of 100 °C, acid/solid ratio of 3 ml/g, stirring speed of 300 rpm, and leaching time of 50 min; and the second stage of the initial H2SO4 concentration of 11 mol/L, leaching temperature of 150 °C, acid/solid ratio of 4 ml/g, stirring speed of 300 rpm, and leaching time of 50 min, a scandium leaching rate of 96.98% was achieved. The kinetics of scandium leaching conformed to a shrinking-core model, and sulfuric acid concentration and temperature were the most important parameters affecting the scandium leaching rate. The kinetic analysis of scandium leaching at different sulfuric acid concentrations showed that as the concentration increased, the sulfuric acid leaching of scandium changed from being chemical reaction-controlled to internal diffusion-controlled, and the apparent reaction order was 1.2429. The kinetics of scandium leaching at different temperatures showed that the sulfuric acid leaching of scandium was reaction-controlled and the apparent activation energy was 42.21 kJ-mol-1.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 3; art. no. 146171
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Geochemiczno-mineralogiczne badania koncentracji pierwiastków rzadkich i towarzyszących w obrębie mineralizacji kasyterytowo-siarczkowej w paśmie łupkowym Starej Kamienicy w Sudetach Zachodnich – wyniki wstępne
Geochemical-mineralogical research of the rare and associated element concentrations within cassiterite-sulphide mineralization in the Stara Kamienica schist belt in the Western Sudetes - preliminary results

Autorzy:

Małek, Rafał
Mikulski, Stanisław, Z.

Powiązania:

https://bibliotekanauki.pl/articles/2075983.pdf

Data publikacji:

2019

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

pierwiastki rzadkie
kasyteryt
siarczki
mineralizacja rudy
zasoby rudy
Sudety
rare elements
cassiterite
sulfides
ore mineralization
ore deposit
Sudetes

Opis:

Abstract. The main task of research was to quantitatively and qualitatively identify rare and associated elements that occur within a cassiterite-sulphide mineralization zone hosted Precambrian - Lower Paleozoic metamorphic rochi in the Stara Kamienica schist belt making up the part of the Izera-Karhonosze Massif. Over 70 samples from archive boreholes and abandoned Sn-ore mines were examined using modern methods like portable pXRF, geochemical analysis (ICP-MS, WD-XRF, GF-AAS), polarizing microscopy, electron microprobe analysis (EMPA) and scaning electron microscopy with EDS system (SEM-EDS). Preliminary results show interesting concentrations of associated elements such as Zn (max 0.56%), Pb (max 0.7%), Cu (max 0.33%), As (max 0.55%), and some rare elements like In, Re, Nb, Co, Bi, Pt, V, La and Ce.

Źródło:

Przegląd Geologiczny; 2019, 67; 179--182
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Study of new commercial collectors for the recovery of coarse quartz particles in iron ore flotation

Autorzy:

de Oliveira, Geraldo Lisboa
da Silva, Gilberto Rodrigues

Powiązania:

https://bibliotekanauki.pl/articles/24202892.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

flotation
new collector
amine
iron ore
coarse quartz

Opis:

Currently, a small range of commercial collectors is available for the use in reverse iron ore flotation at Vale. This input represents a considerable unit cost, being essential for the concentration of low content itabiritic iron ores. The present work evaluated the reverse cationic flotation of an itabiritic ore with low iron content (39.6 % Fe) from the Iron Quadrangle (BR) in bench scale tests, focusing on the use of new collectors to remove coarse quartz. The sample presents 19% of its particles as oversize in the 0.150 mm sieve. The poor flotation of coarse quartz particles (>0.150 mm) causes significant problems in various iron ore flotation circuits by contaminating the concentrate. The study evaluated the performance of 10 new collectors from the etheramine family with different degrees of neutralization and at different collector dosages. The flotation process variables were set as industrially practiced at the Cauê iron ore plant (BR). In tests varying the specific collector dosage, the nonneutralized etheramines showed improved performance compared to the current 50% neutralized etheramine used in the plant, achieving industrial targets: concentrate SiO2 content rate lower than 4.5% (1.4%), tailings iron content lower than 23% (18.94%), metallurgical recovery greater than 66% (74,8%), and Gaudin Selectivity Index greater than 6.6 (10.5). The 0.150 mm oversize in the concentrate, mostly coarse quartz particles, was reduced from 5.7% down to 1.2%, indicating the potential for the industrial application of non-neutralized etheramines in the recovery of coarse quartz.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 174292
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Simulation of a high-pressure water jet structure as an innovative tool for pulverizing copper ore in KGHM Polska Miedź S.A.

Autorzy:

Borkowski, P.
Shimizu, S.
Peng, G.
Oguma, Y.

Powiązania:

https://bibliotekanauki.pl/articles/972348.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

copper ore
comminution
high-pressure water jet
simulations

Opis:

Effective comminution of copper ore for further processing during flotation is still a challenge, both as a technological problem as well as for the high energy costs of such processing. A high-pressure water jet is one alternative method of preparing copper ore for final flotation, causing distinct enlargement of the surface of micronized particles, which could be profitable for copper production. As a consequence of such innovative processing, particles of copper ore become micronized, ensuring grain fractions directly useful for flotation at the exit of the pulverizing apparatus (the hydro-jetting mill).The paper presents some results of simulation as well as describing an analysis of the phenomena occurring inside the high-pressure water and abrasive-water jets of specific structures, elaborated in the aspect of developing hybrid jets of maximum erosive efficiency, potentially useful for effective pulverization.

Źródło:

Mining Science; 2015, 22; 147-159
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Komputerowa ocena zagrożenia tąpaniami złóż rudnych o złożonej budowie geologicznej
Computer estimation of rockburst-hazardous of ore deposits difficult geologic structure

Autorzy:

Sidorov, D. V.

Powiązania:

https://bibliotekanauki.pl/articles/186036.pdf

Data publikacji:

2012

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG

Tematy:

zagrożenie tąpaniami
złoża rudne
rockburst hazard
ore deposits

Opis:

Rozpatrzono procesy komputerowego modelowania stanu naprężeń z uwzględnieniem wpływu zaburzeń tektonicznych. Przytoczono wyniki oceny liczbowej wpływu zaburzeń na zagrożenie tąpaniami rudnych elementów nośnych.
Processes of computer modelling of a stress of ore deposit taking into account influence of tectonic disturbances are considered. Results of a numerical estimation of degree of influence of failures on a rock-bump hazard of bearing ore elements are resulted.

Źródło:

Mechanizacja i Automatyzacja Górnictwa; 2012, R. 50, nr 3, 3; 19-25
0208-7448

Pojawia się w:

Mechanizacja i Automatyzacja Górnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Improvement of mechanical strength of iron ore pellets using raw and activated bentonites as binders

Autorzy:

Gul, A.
Sirkeci, A. A.
Boylu, F.
Guldan, G.
Burat, F.

Powiązania:

https://bibliotekanauki.pl/articles/109658.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

bentonite
pelletizing
iron ore concentrate
binder
sodium bicarbonate

Opis:

In this study, sodium, calcium, and mixed bentonite samples were used as binders in the pelletizing fine iron ore concentrate obtained from the Divrigi Iron Ore Concentration Plant in Turkey. In the pelletizing tests, sodium bentonite sample was used as received and after upgrading process. Additionally, the calcium bentonite sample required activation by sodium bicarbonate while the mixed bentonites sample was used untreated and as well as activated. The pellets produced were tested for compressive strengths, drop number, and porosity in order to characterize the pellets. The results showed that untreated and upgraded sodium bentonite samples provided relatively stronger pellets compared to calcium and the mixed type bentonite samples needed activation with sodium bicarbonate to increase the strength of the pellets. Based on the results of the drop number, compressive strengths, and porosity, it is possible to make pellets which meet the standards by adequate addition of type and amount of bentonite.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 1; 23-36
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Kinetics of sulphuric acid leaching of titanium from refractory anatase under atmospheric pressure

Autorzy:

Gao, Likun
Rao, Bing
Dai, Huixin
Xie, Haiyun
Wang, Peng
Ma, Fangtong

Powiązania:

https://bibliotekanauki.pl/articles/109701.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

anatase ore
kinetics
sulphuric acid
leaching
titanium dioxide

Opis:

Anatase, as an important titanium resource, is attracting more and more attention in research and application. In this study, an efficient process of comprehensively extracting the titanium and other valuable elements from the anatase mineral was proposed. The effect of particle size, stirring speed, initial sulphuric acid concentration, solid-to-liquid ratio, and reaction temperature on the leaching rate of titanium from anatase was investigated. Under appropriate two-stage countercurrent leaching conditions, with the first stage of the liquid-to-solid ratio of 1/3 g/cm3, reaction temperature of 120 °C, initial acid concentration of 11 mol/dm3, residence time of 30 min, stirring speed of 200 rpm, and the second stage of the liquid-to-solid ratio of 1/3 g/cm3, reaction temperature of 200 °C, initial acid concentration of 13 mol/dm3, residence time of 30 min, and stirring speed of 200 rpm, over 99% TiO2, 99% Al2O3, and 97% Sc2O3 were extracted respectively with quartz still remained in the residue. X-ray diffraction, X-ray fluorescence spectrometer, and scanning electron microscopy/energy-dispersive spectroscopy were used to characterize the anatase samples before and after the leaching. Additionally, the leaching kinetics analysis indicated that both acid concentration and temperature were the most significant parameters for the leaching process. And, the titanium leaching reaction rate was controlled by the diffusion of reactants through the residual layer.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 2; 467-478
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Comparative study on the effect of using conventional and high pressure grinding rolls crushing on the ball mill grinding kinetics of an iron ore

Autorzy:

Barani, K.
Balochi, H.

Powiązania:

https://bibliotekanauki.pl/articles/109893.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

high pressure grinding rolls
HPGR
grinding
iron ore

Opis:

The effect of using conventional and high pressure grinding rolls (HPGR) crushing on the ball mill grinding of an iron ore was assessed to determine how these different comminution processes affect the ball mill grinding kinetic. For this purpose, the sample was obtained from the Jalalabad Iron Ore Mine and crushed by conventional crusher and HPGR. Then, the crushing products were ground in a laboratory ball mill. Five single-sized fractions of (–4+3.15 mm), (–2+1.7 mm), (–1+0.850 mm), (–0.500+0.420 mm), and (–0.212+0.180 mm) were selected as the ball mill feed. The specific rates of breakage (Si) and cumulative breakage distribution function (Bi,j) values were determined for those size fractions. It was found that for all fraction the Bi,1 values of the HPGR product were higher than those for the crusher product. It means that the particles produced by the dry ball milling of the HPGR product were finer than by the crusher. Also, the results showed that the specific breakage rate of the material crushed by HPGR at coarse fractions (–4+3.15 mm, -2+1.7 mm, and -1+0.850 mm) was higher than the material crushed by conventional crushers. However, at fine fractions (–0.500+0.420 mm and -0.212+0.180 mm), there was a small difference and the specific breakage rates were the same. This issue can be explained by the fact, that for coarse fractions the particles had longer side surfaces and thus were more affected by the lateral pressure. The results of verification test showed that after 60 seconds of grinding the 80% passing size of the HPGR and crusher products (D80) were reduced from 3311 μm to 760 μm and 1267 μm, respectively.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 920-931
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Flotation behavior of nickel sulfide ore in a cyclonic flotation column

Autorzy:

Deng, L.
Li, G.
Cao, Y.
Ma, Z.

Powiązania:

https://bibliotekanauki.pl/articles/109906.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

cyclonic flotation column
floatability
flotation
nickel sulfide ore

Opis:

This study aimed to show the flotation behavior of a nickel sulfide ore in a cyclonic flotation column. The flotation experiments were carried out using a sample of nickel sulfide ore obtained from a mineral processing plant of China. Representative samples collected from the feed, concentrate, tailing, and circulation middling were sieved using a cyclonic particle analyzer to collect different size fractions for analysis. The function of the column cyclonic zone of was evaluated by comparing the quality of tailing and circulation middling. The flotation results showed that the concentrate with Ni grade of 1.78% and recovery of 65.56% was obtained under given test conditions. The content of main sulfide minerals and coarse particles in the circulation middling was higher than that in the tailing. The results indicated that, unlike conventional cyclone classification, separation achieved in the cyclonic zone of the column was not dependent on the particle size and density. Sulfide minerals with good floatability were easily captured by bubbles and moved toward the center of the column, even if these particles were coarser and heavier.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 2; 770-780
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Investigations on a novel collector for anionic reverse flotation separation of quartz from iron ores

Autorzy:

Fang, Ji
Ge, Yingyong
Liu, Shunbing
Yu, Jun
Liu, Cheng

Powiązania:

https://bibliotekanauki.pl/articles/1448585.pdf

Data publikacji:

2021

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

reverse flotation
iron ore
quartz
collector
fatty acid

Opis:

It is necessary to exploit an easy and effective way to obtain flotation collector. In this paper, oleic acid was modified by oxidation reaction to obtain an excellent collector. The flotation performances of oleic acid and its oxidation products were systematically investigated and a novel collector ((E)-8,11-dihydroperoxyoctadec-9-enoic acid, EDEA) was obtained. Single mineral flotation tests results showed that EDEA had strong flotation power towards quartz at pH＞11 and hardly floated hematite and magnetite at pH=8~13. The recovery of quartz could achieve 92.35% with 120 mg/L EDEA under the condition of pH=12 and dosage of $CaCl_2$ 60mg/L while the recovery was 62.44% with 120 mg/L oleic acid. Bench scale flotation tests results showed that EDEA had a preferable effect on separating quartz from iron ore especially at low flotation temperature (288K). The mechanism research revealed that EDEA attracted on quartz surface through electrostatic attraction and the neighboring EDEA molecules could form intermolecular hydrogen bonds which resulted in a closer alignment of EDEA on quartz surface.

Źródło:

Physicochemical Problems of Mineral Processing; 2021, 57, 1; 136-155
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Process mineralogy of Bayan Obo rare earth ore by MLA

Autorzy:

Xu, Caili
Chi, Ru’an
Zhang, Yantu
Zhong, Chengbin
Ruan, Yaoyang
Lyu, Renliang
Zhou, Fang

Powiązania:

https://bibliotekanauki.pl/articles/1449295.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

process mineralogy
rare earth
Bayan Obo ore
MLA

Opis:

The maximum recovery of rare earth resource from the Bayan Obo ore deposit is a difficult task, especially without the sufficient data of mineralogy. In this paper the mineralogy of Bayan Obo ore deposit by comprehensively research with the application of mineral liberation analyzer (MLA) is reported. The MLA was applied to quantitatively analyze the complicated element/mineral compositions, the REE occurrence, the size distribution and the degree of liberation of the Bayan Obo ore. Mineralogical analysis of the rare earth ore has shown that REEs are present mainly as bastnaesite and monazite-(Ce) to a small extent as parisite-(Ce). 5.85% of the REEs, 34.99% of iron and 0.12% of niobium occur in the ore sample. There are 76.99% of iron occurred in hematite and the remaining iron is mainly distributed in magnetite and goethite. The degree of liberation of bastnaesite and monazite(Ce) was 79.65% and 75.67% respectively when the grinding fineness was 83.57% passing 75 μm sieves. Un-liberated or partly liberated rare earth minerals are associated closely mainly with other rare earth minerals and gangues. These theoretical data could be employed to further comprehensively utilize the rare earth ore.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 4; 737-745
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Selective leaching of copper from near infrared sensor-based preconcentrated copper ores

Autorzy:

Ambo, Amos Idzi
Iyakwari, Shekwonyadu
Glass, Hylke J

Powiązania:

https://bibliotekanauki.pl/articles/1449474.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

near infrared
leaching
pre-concentration
ore characterization
copper

Opis:

Copper oxide ore was pre-concentrated using near infrared sensor-based method and classified as product, middling and waste. The product and middling fractions were leached with ammonium chloride reagent. The effect of temperature, ammonium chloride concentration, solid- liquid ratio, stirring speed and particle size experimental variables were investigated. Mineralogical and chemical analysis of the ore fractions indicated that copper content was in accordance with the preconcentration strategy, with the product having a higher concentration than the middling and waste. The rate of copper extraction was found to be higher in the product than in the middling sample which further supports the near infrared classification, QEMSCAN®, X-ray diffraction, SEM mineralogical and X-ray florescence and Inductively coupled plasma Mass spectrometry chemical data. It was revealed that the leaching rate increases with increasing ammonium chloride concentration, temperature and decreasing ore particle size, stirring speed and solid-liquid ratio. Analysis of the experimental data by shrinking core model indicated that the dissolution kinetics follow the heterogeneous reaction model for the chemical control mechanism where the activation energies of 45.9 kJ/mol and 47.5 kJ/mol for product and middling fractions respectively were obtained. Characterization of the residue obtained at optimum leaching condition with X-ray diffraction suggests that copper was selectively leached when compared to the profile of the raw ore. The trace levels of metals associated with abundant X-ray diffraction profiles of residue found in the leachate further confirm the selective leaching process.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 1; 204-218
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Badania mikrobiologiczno-mineralogiczne rud z wybranych złóż Polski
Microbiological and mineralogical investigation of ores from selected Polish deposits

Autorzy:

Pawlikowski, M.
Walczak, M.
Krawiec, A.
Wróbel, M.

Powiązania:

https://bibliotekanauki.pl/articles/343859.pdf

Data publikacji:

2014

Wydawca:

nakł. Maciej Pawlikowski

Tematy:

bakteriologia
mineralogia
minerały kruszcowe
bacteriology
mineralogy
ore minerals

Opis:

Wykonano badania mineralogiczno- petrograficzne oraz mikrobiologiczne skał ze złóż miedzi (Lubin), manganu (Tatry – Dolina Chochołowska) i złóż Zn-Pb (Olkusz). Oznaczono skład mineralny skał. Następnie z wnętrza dużych okazów pobrano sterylnie próbki, które rozkruszono i zalano odpowiednimi pożywkami doprowadzając do namnażania się bakterii żyjących w skałach. Otrzymane szczepy poddano badaniom mikrobiologicznym i skaningowym połączonym z chemicznymi analizami EDS wyhodowanych bakterii. Udokumentowano występowanie następujących typów fizjologicznych bakterii: • Skały miedzionośne: heterotroficzne bakterie tlenowe i beztlenowe; bakterie uczestniczące w przemianach związków siarki, w tym beztlenowe heterotroficzne bakterie redukujące siarczany oraz chemoautotroficzne tlenowe bakterie Thiobacillus thiooxidans, Thiobacillus thioparus a także chemoautotroficzne tlenowe bakterie utleniające żelazo Fe2. • Skały manganonośne: heterotroficzne bakterie tlenowe i beztlenowe; bakterie uczestniczące w przemianach związków siarki, w tym beztlenowe heterotroficzne bakterie redukujące siarczany oraz chemoautotroficzne tlenowe bakterie Thiobacillus thiooxidans, Thiobacillus thioparus. • Skały ołowiowo i cynkonośne: heterotroficzne bakterie tlenowe i beztlenowe; bakterie uczestniczące w przemianach związków siarki, w tym beztlenowe heterotroficzne bakterie redukujące siarczany oraz chemoautotroficzne tlenowe bakterie Thiobacillus thiooxidans, Thiobacillus thioparus a także chemoautotroficzne tlenowe bakterie utleniające żelazo Fe2.
Mineralogical –petrographical as well as microbiological investogation of rocks from Cu deposit (Lubin), Mn deposit (Tatra Mts), and Zn-Pb deposit (Olkusz) have been performed. Mineral compostion of rocks devoted for microbiological examination was determined. Material for microbiological examination was taken from center of big samples to keeping sterility. Next obtained material was mixed with nutrient medium for multiplication of bacteria present in rocks. Obtained strains were examined using microbiological as well as mineralogical methods (SEM, EDS). Following types of bacteria were determined: • Cu bearing rocks: • Mn bearing rocks: • Zn-Pb bearing rocks.

Źródło:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2014, 17; 1-28
1689-6742

Pojawia się w:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Mechanisation of Longwall Extraction of Hard and Abrasive Rocks

Autorzy:

Bołoz, Ł.
Krauze, K.
Kubín, T.

Powiązania:

https://bibliotekanauki.pl/articles/2064946.pdf

Data publikacji:

2018

Wydawca:

STE GROUP

Tematy:

mechanical ore excavation
longwall system
disc cutting head

Opis:

The article presents the current topic of the possibility of mechanical extraction of hard and abrasive rocks using mechanized wall systems. The problem of extracting ores from thin strata precludes the possibility of further use of current technologies involving a human at the face. Currently, the operation is carried out using explosives in column-pillar systems. In systems with a chamber column, all major processes are mechanized and carried out by self-propelled drilling and bolting machines, loaders as well as hauling and auxiliary trucks. These machines are operated in the workplace by operators. For many years, effective mechanical excavation methods were sought that would allow the development of a mining machine and a mechanised longwall complex. Such a complex is to allow excavation without the presence of humans at the face. The article presents the current technical capabilities, assumptions and requirements for such a solution. Then, an innovative longwall complex equipped with a disc shearer is introduced. The technology of work and achievable productivity are briefly presented. A worn shearer, a face conveyor and a powered support are the subject of AGH inventions.

Źródło:

Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 331--337
2545-2827

Pojawia się w:

Multidisciplinary Aspects of Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Applicability of published experimental works as a knowledge source in recommendation of gold ore processing workflows

Autorzy:

Rintala, L.
Aromaa, J.
Forsen, O.

Powiązania:

https://bibliotekanauki.pl/articles/109780.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gold ore
leaching
case-based reasoning
process development

Opis:

The experimental work is the most time consuming and expensive part of the process design. A case-based reasoning (CBR) methodology can be used to assist in the process design. Auric Adviser is a CBR system under development for recommendation of gold ore processing workflows. In Auric Adviser the knowledge in gold ore processing is represented in two models. The first model holds the knowledge needed to recommend process chains already used in industry. The second knowledge model is intended to recommend the most efficient unit processes based on research results. The objective of this study was to analyse the information richness of journal articles and other publications concerning single process steps of gold extraction. The aim was to study the applicability of these publications as a source for the second Auric Adviser knowledge model. In this study, 25 publications concerning leaching of gold were analysed and information was extracted in a case base. The case base was taken as either a process or experimental description with clearly defined differences to other descriptions. In total, 218 cases that described results of gold leaching were extracted from the sources. The analysis of descriptions showed that the knowledge necessary for design the second Auric Adviser model can be elicited from journal articles and other publications concerning single process steps. The trends in the case description were that the gold content and process outcome were usually well described. Nevertheless, the information richness varied in descriptions of raw materials, experimental arrangements but the results were often missing details. The incompleteness of information causes challenges in the process comparison although it does not prevent the CBR system to work.

Źródło:

Physicochemical Problems of Mineral Processing; 2015, 51, 2; 707-717
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Physicochemical properties of pseudobrookite Fe2TiO5 synthesized from ilmenite ore by co-precipitation route

Autorzy:

Mahmoud, Mohamed H. H.
Hessien, Mahmoud M.
Alhadhrami, Abdulrahman
Gobouri, Adel A.

Powiązania:

https://bibliotekanauki.pl/articles/109822.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

ilmenite ore
pseudobrookite
Co-precipitation
nanocrystalline
magnetic properties

Opis:

Pseudobrookite (Fe2TiO5) is a semiconductor with numerous potential applications. Low-grade ilmenite ore has been used as an inexpensive source of Fe and Ti for preparation of Pseudobrookite. Ilmenite was first leached with 20% hydrochloric acid for 3 h at 70°C. Co-precipitation of soluble Fe and Ti from the rich filtrate was carried out at pH ≥ 9.1 followed by calcination at different temperatures (900-1300oC) for 2 h. X-ray diffraction patterns (XRD) showed that a single-phase nanocrystalline pseudobrookite powder was produced. The pH was a critical parameter for the evolution of formation the different sizes, structural morphology, and the magnetic properties of the product. Scanning electron microscope (SEM) images showed that particles synthesized at pH 11.2 contained more agglomerations and were more porous than those synthesized at pH 9.1. As the calcination temperature increases, the Fe2TiO5 changes from a small rod-like structure to an elongated rod-like structure, and finally to interconnected aggregated crystals. The magnetization of the synthesized Fe2TiO5 was measured using a vibrating sample magnetometer (VSM) and was found steadily increase with increasing calcination temperature from 1000 (≈9 emu/g) to 1300°C (16 emu/g). Such a large saturation of magnetization might be due to the high phase purity and well-defined crystallinity of Fe2TiO5.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 1; 290-300
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 65.

Tytuł:

Modelling of iron ore processing in technological units based on the hybrid approach

Autorzy:

Morkun, Vladimir
Tron, Vitaliy
Zymohliad, Vadym

Powiązania:

https://bibliotekanauki.pl/articles/2106233.pdf

Data publikacji:

2022

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

iron ore
Rosin–Rammler
fuzzy model
separation characteristics

Opis:

The process line of concentrating iron ore materials is considered as a sequence of connected concentration units, some of which partially return ore materials to the previous unit. The output product of the final concentration unit in the process line is the end product of the whole line. Characteristics of ore, such as distribution of ore particles by size and distribution of iron content by size classes, are considered. Processing of iron ore materials by process units (a cycle, a scheme) is characterised by a separation characteristic – namely the function of extracting elementary fractions depending on physical properties of ore particles. The results of fraction analysis of ore samples in different points of the process line provide an experimental definition of separation characteristics and numerical values of the Rosin–Rammler equation factors. To identify dependencies that cannot be analytically described, the hybrid approach accompanied by the Takagi–Sugeno fuzzy models, in accompaniment with triangular membership functions determining fuzzy sets in preconditions, are used. To identify fuzzy sets in rule preconditions, triangular membership functions are used. Introduction of a-priori data on iron ore concentration as constraints for model parameters is a promising trend of further research, since it enables increased accuracy of identification despite limited availability of experimental data.

Źródło:

Acta Mechanica et Automatica; 2022, 16, 1; 82--90
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

The Fusion Characteristics of Ashes from Lignin and the Coke Breeze

Autorzy:

Fröhlichová, M.
Findorák, R.
Legemza, J.
Džupková, M.

Powiązania:

https://bibliotekanauki.pl/articles/352254.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

biomass
ash
fuel
mineral phases
iron ore sinter

Opis:

In this paper are presented results of study fusion characteristics of the biomass ashes from the hydrolyzed lignin and the ashes from the coke breeze. The hydrolyzed lignin ashes were compared with the coke breeze ashes i.e. with a fossil fuel. These ashes were prepared in muffle furnace at the temperature of 550°C (hydrolyzed lignin) and 850°C (coke breeze). Biomass (the hydrolyzed lignin) represents the new fuels for sintering process and an attractive way to decrease CO₂ emissions from the energy production. The characterization methods were the following: standard fuel characterization analyses, chemical and mineralogical composition of the ashes and phase analyses of the ashes of biomass and the coke breeze. These ashes were prepared by the same method. Characterisation of the ashes samples was conducted by means of X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Quantitative analysis of the crystalline and amorphous phases in each of the ash samples were carried out using the Rietveld method. The dominant phase of the ash from the coke breeze was mullite (Al₆ Si₂ O₁₃ ). SiO₂ is the dominant phase of the ash from the hydrolyzed lignin.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 3; 1523-1530
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Effects and mechanism of Bayer red mud on co-reduction with a saprolitic laterite ore to prepare ferronickel

Autorzy:

Wang, Xiaoping
Sun, Tichang
Wu, Shichao
Hu, Tianyang
Rong, Lingkun

Powiązania:

https://bibliotekanauki.pl/articles/1449072.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

red mud
laterite ore
co-reduction
ferronickel powder

Opis:

Co-reduction of a saprolitic laterite and waste Bayer red mud was investigated to prepare ferronickel powder. The synchronous reduction and comprehensive recovery of nickel and iron in the low-grade laterite ores and iron in the red mud were realized. At the red mud dosage of 50 wt%, ferronickel powder with nickel and iron grades of 5.58 wt% and 89.91 wt% was obtained. The corresponding nickel and total iron recoveries were 93.11 wt% and 90.23 wt%, respectively. The red mud enhanced the nickel recovery of the saprolitic laterite ore evidently, attributing to the formation of low-melting anorthite, omphacite, and diopside during co-reduction. This led that NiO in the saprolitic ore was released. Meanwhile, obvious melting phenomenon of the roasting system was appeared, enhancing the growth of the ferronickel particles.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 4; 641-652
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Utilization of polymeric binders to agglomerate oxidized copper ore

Autorzy:

Kiaei, Kimia
Golpayegani, Mohammad Hasan

Powiązania:

https://bibliotekanauki.pl/articles/27323657.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

heap leaching
permeability
agglomeration
polymeric compounds
copper ore

Opis:

Permeability reduction is a major challenge in heap leaching, primarily caused by the accumulation of fines that move with the leaching agent, leading to the formation of dead zones and channeling within the heap. In the Aria copper beneficiation plant, the 0–2 mm fraction with a copper grade of 1.4% undergoes pre-separation prior to heap loading without further processing. This study investigated the potential of using the agglomeration method to improve permeability in the case of using the 0–2 mm fraction of ore. Mineral compounds, such as sodium silicate and calcium sulfate, and non-ionic, cationic, and anionic polymer compounds, were used in the agglomeration process. The strength of interparticle bonding was evaluated by measuring the fine migration percentage (FMP) in the soak test. The results revealed that agglomerates produced using non-ionic compounds had the highest bonding strength, with an FMP of 3.89%, the lowest of all the compounds tested. This enhanced bonding strength was attributed to the combined influence of hydrogen bonding forces and van der Waals forces.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 176682
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Prawidłowości występowania mineralizacji kruszcowej w wybranych kompleksach fundamentu krystalicznego północno-wschodniej Polski
Regularities of appearance of the ore mineralization in some complexes of the crystalline basement of northeastern Poland

Autorzy:

Marcinkowski, B.

Powiązania:

https://bibliotekanauki.pl/articles/2063343.pdf

Data publikacji:

2006

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

fundament krystaliczny
aktywizacja tektoniczno-magmowa
obszary metalogeniczne
strefy metalogeniczne
złoża rud
formacje rudonośne
prognozy złożowe
crystalline basement
tectonic-igneous activity
metallogenic area
metallogenic zones
ore deposits
ore-bearing formation
perspectives of ore deposits

Opis:

Fundament krystaliczny północno-wschodniej Polski występuje na głębokości od około 230 m do kilku km, składa się z presvekofeno-karelskich masywów granitoidowych (mazowiecki, dobrzyński i pomorski), svekofeno-karelskich kompleksów metamorficzno-fałdowych (podlaski, ciechanowski i kaszubski) oraz gotyjskiego kompleksu mazurskiego. Pod względem złożowym najważniejsze znaczenie mają kompleksy strukturalno-tektoniczne występujące do głębokości 1000 m. Są to kompleksy mazurski i podlaski, ciągnące się szerokim pasem wzdłuż północno-wschodniej i wschodniej granicy kraju. Ważne znaczenie metalogeniczne ma strefa kontaktowa kompleksu mazurskiego z kompleksami ciechanowskim, mazowieckim i podlaskim, nazwana mazursko-mohylewską strefą aktywizacji tektoniczno-magmowej. Znajduje się w niej szereg intruzji ze złożami i przejawami mineralizacji kruszcowej. W podłożu krystalicznym północno-wschodniej Polski wydzielono obszary metalogeniczne o regionalnym zasięgu, wśród których występują mniejsze jednostki zwane strefami metalogenicznymi. Wyniki badań geofizycznych posłużyły do tworzenia modelu budowy geologicznej pod kątem koncentracji rud metali, wyznaczenia granic stref metalogenicznych oraz określenia perspektyw złożowych. Pierwotna mineralizacja Fe—Ti—V jest związana z intruzjami zasadowymi, ultrazasodowo-alkalicznymi, metamorficznymi i suprakrustalnymi skałami kompleksu podlaskiego. W skałach zasadowych w intruzji suwalskiej stwierdzono śladowe ilości metali szlachetnych (Ag, Au i Pt), związane z siarczkami i magnetytem. W obrębie mazursko-mohylewskiej strefy aktywizacji tektoniczno-magmowej stwierdzono: w intruzji Tajna — karbonatyty, w strefie Wigier — marmury krzemianowe (kalcyfiry) oraz w intruzji Ełku — skarbonatyzowane skały alkaliczne. Wymienione strefy metalogeniczne zawierają także mineralizację siarczkową i TR (pierwiastki ziem rzadkich). W intruzjach Tajna, Ełku i Sejn stwierdzono także cienkie post-tektoniczne żyłki z przejawami mineralizacji polimetalicznej.
The crystalline basement of northeastern Poland occurs at a depth from about 230 m to several km and consists of Presvekofenno-Karelian granitoid massifs (Mazovian, Dobrzyń, Pomeranian), Svekofenno-Karelian metamorphic-folded zones (Podlasie, Ciechanów, Kaszuby) and Masurian Gothian Complex. Considering ore deposits the most important are Podlasie and Masurian complexes. They are situated along the eastern and northeastern border of Poland. A contact zone between Masurian Complex and Ciechanów, Mazovian and Podlasie complexes called Masurian-Mohylev zone of tectonic-igneous activity is very important. The Masurian-Mohylev zone contains some platform and basic intrusions with ore deposits and traces of mineralization. In the crystalline basement of northeastern Poland great metallogenic areas including smaller metallogenic units called metallogenic zones were distinguished. Geophysical investigations contributed to making of a model of geological structure in regard to ore deposits. Results of geophysical investigations were helpful while defining the boundary of metallogenic zones. Primary minerallization of Fe—Ti—V is connected with basic, ultrabasic-alkaline intrusions, metamorphic and supracrustal rocks, which appear in Podlasie Complex. Traces of the noble metals (Au, Ag, Pt) connected with sulphides and magnetite were detected in the Suwałki intrusion. Within the Masurian-Mohylev zone of tectonic-igneous activity veins of carbonatites (Tajno intrusion), calciphyres (Wigry unit) and carbonatized rocks (Ełk intrusion) occur. All mentioned metallogenic zones contain sulphides mineralization and REE (Rare Earth Elements). In the Sejny and Wigry intrusions, posttectonic veins with traces of polimetalic mineralization occur.

Źródło:

Biuletyn Państwowego Instytutu Geologicznego; 2006, 421; 53--90
0867-6143

Pojawia się w:

Biuletyn Państwowego Instytutu Geologicznego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

New method of electrostatic separation of the oxidized iron ore

Autorzy:

Idres, A.
Bouhedja, A.
Bounouala, M.
Benselhoub, A.

Powiązania:

https://bibliotekanauki.pl/articles/89112.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

iron ore
electrostatic separation
reagent-collector
reagent–depressant
efficiency

Opis:

The complexity of the mineralogical, chemical and exogenous parameters generates a low efficiency of electrical separation of oxidized iron ore. For this purpose, a study was conducted to provide a method for electrostatic separation and to select the chemical reagents. And this, for increasing the contrast of the dielectric separating minerals in the corona discharge field. The reagent-collector used is the auramine with a specific consumption of 0.3 kg/t. Whereas, the reagent depressants is carboxymethyl cellulose mixture with a specific consumption of 0.25 kg/t. From the obtained test results electrical treatment of oxidized iron ore are satisfied for proposed process.

Źródło:

Mining Science; 2016, 23; 33-41
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Epithermal Cu mineralization in the Stary Lesieniec rhyodacite quarry, Lower Silesia : primary and secondary mineral paragenesis

Autorzy:

Mederski, Sławomir
Kruszewski, Łukasz
Pršek, Jaroslav

Powiązania:

https://bibliotekanauki.pl/articles/2060102.pdf

Data publikacji:

2021

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Stary Lesieniec
copper sulphides
epithermal ore deposit
secondary minerals

Opis:

Primary epithermal and secondary Cu mineralization in the Stary Lesieniec rhyodacite quarry, located within the Intra-Sudetic Depression, was studied using reflected light microscopy, powder X-ray diffraction, and electron microprobe. Samples containing copper sulphides, baryte, and secondary weathering minerals were collected from mineralized veinlets in the Upper Carboniferous rhyodacite. Copper sulphides (chalcocite Cu2S, djurleite Cu31S16, anilite Cu7S4 / digenite Cu9S5, and covellite CuS) are the major ore minerals and are associated with quartz, hematite, and very minor uraninite. The samples studied indicate phase transformation from chalcocite to anilite, which indicates that Cu sulphides began to crystallize at ~100°C. Then, during the epithermal stage of precipitation, the temperature of the solutions dropped <72°C, based on the Cu-S ternary diagram and anilite stability. Admixtures of Ag, Fe, Bi, and Se in the sulphides are very minor. Supergene paragenesis is represented by chrysocolla with minor brochantite and very scarce malachite. These only bear trace impurities at the anionic sites. The supergene oxidation process began with the formation of abundant chrysocolla, at a relatively neutral pH. After dropping of the pH to ~4–6, brochantite was deposited.

Źródło:

Geological Quarterly; 2021, 65, 3; 65: 43
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Występowanie rud uranu i perspektywy ich poszukiwań w Polsce
Occurrences of uranium ore in Poland and possibilities for prospecting for uranium deposits

Autorzy:

Nieć, M.

Powiązania:

https://bibliotekanauki.pl/articles/282809.pdf

Data publikacji:

2009

Wydawca:

Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Tematy:

złoża uranu
poszukiwania
Polska
uranium ore deposits
prospecting
Polska

Opis:

Analiza stanu znajomości złóż uranu i perspektyw ich poszukiwania w Polsce pozwala na sformułowanie poglądu o celowości podjęcia prac badawczych i bardziej zaawansowanych prac poszukiwawczych rekonesansowych oraz poszukiwawczych wstępnych w wytypowanych obszarach. W Sudetach można oczekiwać złóż związanych z metasomatytami alkalicznymi, śródgranitowych oraz piaskowcowych (w osadach najwyższego karbonu i kredowych). Na monoklinie przedsudeckiej, peryklinie Żar i w syneklizie perybałtyckiej można oczekiwać złóż piaskowcowych w utworach triasu. Wskazane jest podjecie prac badawczych w celu potwierdzenia lub wykluczenia możliwości ich występowania.Złoża udokumentowane, ubogie: Rajsk w ordowickch w łupkach dictyonemowych, na Podlasiu, Okrzeszyn w łupkach węglistych i węglach wdepresji wewnętrznosudeckiej, Wambierzyce-Radków w łupkach walchiowych, stanowią potencjalna bazę zasobową, możliwą do zagospodarowania jeśli nastąpi istotny postęp w technologii wykorzystywaniu tego typu rud.
The review of the state of knowledge of uranium ore in Poland suggests the possibilities of finding concealed uranium deposits. The respective study of their possible mode of occurrences, reconnaissance and preliminary prospecting in preliminary designed areas should be undertaken. Such areas exist in Sudety Mountains and in North East Poland. In Sudety Mt. The vein intragranitic, alkaline metasomatite related and sandstone type (in upper Carboniferous and Cretaceous formation) deposit could be expected. On Foresudetic monocline, Żary pericline and Peribaltic syneclise sandstone type deposits in Triassic sandstone may occur. More advanced study on their possible mode occurrence and prospecting premises are recommended. Known low quality deposits Rajsk in the Ordovician dictyonema shales in North East Poland, Okrzeszyn in carbonaceous shales and coals in Intrasudetic depression and Wambierzyce-Radków in walchia shales contains ore resources which utilization would be possible if considerable progress will be gained in uranium recovery from such lean ores.

Źródło:

Polityka Energetyczna; 2009, T. 12, z. 2/2; 435-451
1429-6675

Pojawia się w:

Polityka Energetyczna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Comparison of Intelligent Control Methods for the Ore Jigging Process

Autorzy:

Kulakova, Yelena
Wójcik, Waldemar
Suleimenov, Batyrbek
Smolarz, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/1844513.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

neural network
ore jiggling
control algorithm
fuzzy logic
correlation

Opis:

Efficient control of the process of jigging ore of small and fine grain allows avoiding the loss of valuable material in production residual. Due to the multi-dimensionality and multi-connectivity of this enrichment process, classical control methods do not allow achieving the maximum technological indicators of enrichment. This paper proposes investigating intelligent algorithms for controlling the jigging process, which determine the key variables - the level of the natural «bed» and the ripple frequency of the jigging machine. Algorithms are developed using fuzzy logic, neural and hybrid networks. The adequacy of intelligent algorithms was evaluated using the following criteria: correlation of expert and model values (R); Root Mean Square Error (RMSE); Mean absolute percentage error (MAPE). To assess the adequacy of the obtained algorithms, a test sample of input variables, different from the training one, was compiled. As a consequence, we determined an algorithm that gives a minimal discrepancy between the calculated and experimental data.

Źródło:

International Journal of Electronics and Telecommunications; 2021, 67, 3; 529-534
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Froth flotation of Aljustrel sulphide complex ore

Autorzy:

Sousa, R.
Futuro, A.
Pires, C. S.
Leite, M. M.

Powiązania:

https://bibliotekanauki.pl/articles/109732.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

froth flotation
mineral liberation
flotation reagents
complex sulphide ore

Opis:

Froth flotation of copper-zinc-lead ores is a complex process based on similar metallurgy processing and strong interactions between chalcopyrite and sphalerite. These types of ores represent 15% of the world production and 7.5% of copper deposits all over the world. In the present study, an attempt is made to assess the feasibility of froth flotation of a complex sulphide ore, where the effect of liberation grade as well as depressant, collector and frother dosage was studied. Copper flotation is dependent on the mineral liberation grade, which is significantly related with the size distribution. It was shown that longer grinding time increased the Cu grade but decreased the copper recovery due to the presence of very fine particles. Lime and sodium metabisulphite, used as depressants, allowed to achieve a good flotation performance. It was shown that for this type of ore lower dosage of the collector should be applied. Finally, a higher frother dosage led to a greater selectivity and reduced entrainment of very fine particles, but also caused low kinetic ratio and low recovery of valuable minerals. A well-defined flotation objective was imperative for a good liberation grade and reagents dosage selection, mainly for complex sulphide ores. A useful contribute was given to a better technical understanding of flotation of a complex sulphide ore from the Moinho deposit.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 2; 758-769
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Processing of iron ore fines from alswaween Kingdom of Saudi Arabia

Autorzy:

Ahmed, H. A. M.
Mahran, G. M. A.

Powiązania:

https://bibliotekanauki.pl/articles/109776.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

iron ore fines
flocculation
column flotation
selectivity
dissemination
starch

Opis:

Iron ores located in the Alswaween area (Saudi Arabia) are of finely disseminated nature. They require ultrafine grinding for considerable degree of liberation. In this paper, different upgrading tech-niques were tried for their processing. The applied upgrading techniques included selective flocculation and column flotation as recent efficient technologies in fines upgrading. Each technique was investigated and optimized separately. Results showed that neither selective flocculation nor column flotation can be successfully used alone to produce high quality iron concentrate especially when using iron ore of size fraction 100% -0.075 mm. The best quality concentrate was found to have 55% Fe and 57% Fe when applying selective flocculation and column flotation, respectively at their optimum operating conditions. Meanwhile, the previously obtained results can be significantly improved when grinding the ore below 45 μm and applying selective flocculation as cleaning step for the concentrate obtained from the column flotation. Thus, it is possible to obtain concentrate having iron content of 63.55% Fe with 52.3% yield, which means an iron recovery in concentrate of ~80%.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 419-430
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Hydrochloric acid leaching for upgrading flotation concentrate from a low-grade bauxite ore

Autorzy:

Guan, C.
Chen, L.
Zheng, Y.
Sun, W.

Powiązania:

https://bibliotekanauki.pl/articles/110259.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

bauxite ore
hydrochloric acid leaching
concentrate upgrading
carbonate minerals

Opis:

Bauxite is the major raw material for alumina production, and its Al2O3 grade improvement or desilication is a necessary process for production of high-grade alumina concentrates from bauxite ores. In practice, flotation presents an effective method for the processing of such ores. However, it is not sufficient to produce a concentrate product with high Al2O3 grade from the ores with a single flotation process, especially from these containing abundant carbonate minerals. In this investigation, hydrochloric acid leaching was used to remove dolomite impurity from the flotation concentrate of a bauxite ore, to improve its Al2O3 grade and Al2O3/SiO2 (A/S) ratio. Effects of three dominant parameters on the leaching performance, that is leaching time, leaching temperature and hydrochloric acid concentration, were investigated in details. When these parameters were optimized, the aluminum concentrate assaying 67.41% Al2O3 with 66.84% recovery and 7.44 A/S ratio was obtained from the bauxite ore assaying 42.94% Al2O3 with 2.48 A/S ratio. It was concluded that hydrochloric acid leaching proved an effective method for upgrading of flotation concentrate from a low-grade bauxite ore containing carbonate minerals.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1038-1046
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

Investigation of reduction of magnetite based carbon composite pellets under semi-fusion conditions

Autorzy:

Benkli, Y. E.
Boyrazli, M.
Senoz, G. M. L.
Cizmecioglu, Z.

Powiązania:

https://bibliotekanauki.pl/articles/110725.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

iron ore
pelletizing
cold bonded composite pellet
iron nugget

Opis:

In this study, carbon composite pellets were exposed to a reduction test under low temperature and semi-fusion conditions in which iron was melted without a solid form of slag deteriorated. The purpose of the reduction experiments under the semi-fusion condition was to produce an iron nugget which had physical and chemical properties similar to blast furnace pig iron at lower temperatures. These nuggets were produced from pellets that were made from a mixture of iron oxide, coke, flux, and a binder. These nuggets heated in a furnace with a chamber temperature of 1330 °C. The produced dried carbon composite pellets were melted and carbureted in a single-stage process. In this study, three distinct products were produced as a function of furnace residence time at fixed furnace temperature (1330 °C). These products were direct reduced iron (DRI), transition direct reduced iron (TDRI), and iron nuggets produced at residence times 8-24, 32-40 min, and 48 min, respectively. The iron nugget produced had a high apparent density (6.903 g/cm3), high micro hardness values (328 HV), high iron content (92.7% Fe), and was similar to blast furnace pig iron.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 621-628
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate

Autorzy:

Hasab, M. G.
Rashchi, F.
Raygan, S.

Powiązania:

https://bibliotekanauki.pl/articles/110795.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

refractory gold ore
oxidative pre–treatment
non–cyanide leaching

Opis:

In this research, oxidation of sulfide minerals and leaching of gold from a gold–bearing sulfide concentrate using chloride–hypochlorite solution was investigated. The effects of calcium hypochlorite concentration, sodium chloride concentration and initial pH of leachant on changes of the slurry pH and Eh were examined. Then, considering the stability range of the gold complex (Eh ~ 1000 mV) and for-mation of chlorine gas (pH < 3.5), the optimum leaching parameters were determined. The optimum conditions were obtained at 200 g/dm3 calcium hypochlorite, 200 g/dm3 sodium chloride and initial pH 11 (with 200 g/dm3 concentrate, stirring speed 600 rpm and temperature 25C) at which about 82% gold was extracted in 2 h.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 1; 61-70
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

A hybrid geometallurgical study using coupled Historical Data (HD) and Deep Learning (DL) techniques on a copper ore mine

Autorzy:

Gholami, Alireza
Asgari, Kaveh
Khoshdast, Hamid
Hassanzadeh, Ahmad

Powiązania:

https://bibliotekanauki.pl/articles/2146884.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

hybrid geometallurgy
historical data
deep learning
copper ore
flotation

Opis:

This research work introduces a novel hybrid geometallurgical approach to develop a deep and comprehensive relationship between geological and mining characteristics with metallurgical parameters in a mineral processing plant. This technique involves statistically screening mineralogical and operational parameters using the Historical Data (HD) method. Further, it creates an intelligent bridge between effective parameters and metallurgical responses by the Deep Learning (DL) simulation method. In the HD method, the time and cost of common approaches in geometallurgical studies were minimized through the use of available archived data. Then, the generated DL-based predictive model was enabled to accurately forecast the process behavior in the mineral processing units. The efficiency of the proposed method for a copper ore sample was practically evaluated. For this purpose, six representative samples from different active mining zone were collected and used for flotation tests organized using a randomizing code. The experimental results were then statistically analyzed using HD method to assess the significance of mineralogical and operational parameters, including the proportions of effective minerals, particle size, collector and frother concentration, solid content and pH. Based on the HD analysis, the metallurgical responses including the copper grade and recovery, copper kinetics constant and iron grade in concentrate were modeled with an accuracy of about 90%. Next, the geometallurgical model of the process was developed using the long short-term memory neural network (LSTM) algorithm. The results showed that the studied metallurgical responses could be predicted with more than 95% accuracy. The results of this study showed that the hybrid geometallurgy approach can be used as a promising tool to achieve a reliable relationship between the mining and mineral processing sectors, and sustainable and predictable production.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 3; art. no. 147841
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Geomechaniczne uzasadnienie parametrów filarów przy eksploatacji złóż blisko leżących w kopalni „Kajerkanskij”
Geomechanical substantiation of parameters of the pillars while mining several ore deposits inKayerkansky” mine

Autorzy:

Sidorov, D. V.

Powiązania:

https://bibliotekanauki.pl/articles/187511.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG

Tematy:

eksploatacja złóż
geomechanika górnicza
exploatation
ore deposits
geomechanical parameters

Opis:

W artykule rozpatrzono proces komputerowego modelowania stanu naprężeń w ławicy nr 4 pod wpływem robót górniczych w ławicy nr 2. Przytoczono wyniki ilościowej oceny parametrów filarów w zastosowaniu do ławicy nr 4 z uwzględnieniem wybierania ławicy nr 2.
The article features the process of computer modeling of the stress state in the ore body number 4 under the influence of mining on the ore body number 2. The results were shown of the quantitative estimates of the pillars parameters on the ore body number 4 with respect to the extraction of the ore body number 2.

Źródło:

Mechanizacja i Automatyzacja Górnictwa; 2013, R. 51, nr 3, 3; 12-20
0208-7448

Pojawia się w:

Mechanizacja i Automatyzacja Górnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Geologiczne uwarunkowania eksploatacji złoża rud niklu "Szklary I"
Geological conditions of mining extraction of "Szklary I" nickel ore deposit

Autorzy:

Zielińska, A.
Kobylańska, M.

Powiązania:

https://bibliotekanauki.pl/articles/170099.pdf

Data publikacji:

2011

Wydawca:

Poltegor-Instytut Instytut Górnictwa Odkrywkowego

Tematy:

Szklary
złoża rud
uwarunkowania geologiczne
ore deposits
geological conditions

Opis:

W związku z nowymi możliwościami technologicznymi wzbogacania rudy niklu metodami hydrometalurgicznymi pojawiły się plany wznowienia eksploatacji złóż tej rudy w masywie serpentynitowym Szklar, na Dolnym Śląsku. Wraz z nimi powróciły zagadnienia uwarunkowań geologicznych wydobycia. W roku 2006 spółka KGHM Polska Miedź S.A. uzyskała koncesję na rozpoznanie złoża „Szklary I", wydzielonego w obrębie złoża „Szklary’’ — Obszar Szklana Góra. Rozpoznanie to zostanie zakończone wykonaniem dokumentacji geologicznej złoża iv kategorii C; Ze względu na możliwość przerobu rudy o zawartości 0,3% niklu dla złoża „Szklary I" ustalono indywidualne kryteria bilansowości. Najważniejszymi czynnikami geologicznymi mającymi wpływ na warunki eksploatacji są: głębokość występowania złoża wraz z budową nadkładu i stosunkiem grubości nadkładu do miąższości złoża, warunki hydrogeologiczne oraz warunki geologiczno- inżynierskie [10]. Warunki te zostały w' opracowaniu wstępnie scharakteryzowane.
In accordance to new technological possibilities of nickel ore enrichment with hydrometaUurgical methods, there are plans to restart exploitation of that ore in serpentinite massif of Szklary, Lower Silesia. Issues of geological conditions of mining extraction came back with these plans. In 2006 KGHM Polska Miedź S.A. obtained exploration concession for "Szklary I " deposit, which is contained in the area of "Szklary " - Obszar Szklana Góra deposit. Exploration results will be presented in geological documentation of the "Szklary I" deposit. Due to ability ofprocessing ore with 0,3 % nickel grade for the "Szklary I " deposit individual balance criteria were settled. The most important geological conditions of mining extraction are: the depth of the deposit with the structure of the overburden and relation between thickness of the overburden and of the ore body, hydrogeological and geological-engineering conditions. These were shortly characterized in the article.

Źródło:

Górnictwo Odkrywkowe; 2011, 52, 1-2; 60-66
0043-2075

Pojawia się w:

Górnictwo Odkrywkowe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Wykorzystanie spektroskopii odbiciowej w rozpoznawaniu złóż kopalin metalicznych
Reflectance spectroscopy in ore deposits exploration

Autorzy:

Bu, B.
Niedbał, M.

Powiązania:

https://bibliotekanauki.pl/articles/170620.pdf

Data publikacji:

2011

Wydawca:

Poltegor-Instytut Instytut Górnictwa Odkrywkowego

Tematy:

złoża kopalin metalicznych
spektroskopia
HyLogger
ore deposits exploration
spectroscopy

Opis:

Postąp techniczny i zapotrzebowanie na surowce metaliczne, przy jednoczesnym ograniczaniu kosztów badań, wymagają opracowywania nowych metod badawczych. Efektem innowacyjnego zastosowania istniejących metod, połączonych z ich opt\- malizacjąjest powstanie technologii HyLogger z pakietem wspomagającym, w CSIRO w Australii (Commonwealth Scientific and Research Organization) pod kierownictwem dr John 'a Huntington 'a. Urządzenie opiera się na metodzie spektroskopii odbiciowej i jest w stanie analizować tysiące odebranych widm w różnych zakresach podczerwieni. Widma są analizowane przez program i nadają się do wykorzystania przy tworzeniu wizualizacji badanego obszaru. HyLogger nie rozpoznaje samych retail a tylko minerały pospolicie występujące w ich otoczeniujak krzemiany i wodorotlenki. Pierwsze próby nad metodąpodjęto podczas profilowań rdzeni wiertniczych z obszaru pasa zieleńcowego, w sąsiedztwie intruzji porfirowej. Mineralizacja złotonośna jest związana genetycznie z roztworami hydrotermalnymi i intruzjami. Towarzysząjej zmiany okołorudne, które są widoczne na wykresach konstruowanych po skanowaniu rdzenia przez HyLogger. Stwierdzono powiązanie zmian chemizmu amfiboli i chlory tów z obecnością minerałów kruszcowych.
Technical development and metal demand is in opposite to decreasing finances for geological research force geologists hi create cheap and fast tools invaluable during mineral exploration. HyLogger is the result of such a research which aim was tooptimize currently existing technologies. HyLogger technology is the invention made by Dr. John Huntington 's scientific team from The Australian Commonwealth Scientific and Research Organization (CSIRO). Basically device uses reflectance,spi.au scopy to determine mineralogy in samples. Spectra are analyzed by software and ready to be used to create visualization of the deposit. All results are described by their typical wavelength and then crosslinked with the FeO/FeO+MgO ratios. ('him m . and amphiboles have the highest potential in indicating new ore deposits. Fe, Mg and Al in relation to distance from gold occurrences show weak correlation. Magnesium content in chlorite composition is growing nearly to gold occurances. neralization is genetically connected with hydrothermal fluids and porphyry intrusions which caused mineral alteration easily recognizable by HyLogger.

Źródło:

Górnictwo Odkrywkowe; 2011, 52, 1-2; 80-83
0043-2075

Pojawia się w:

Górnictwo Odkrywkowe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Współwystępowanie mineralizacji kruszcowej i węglowodorów : przykład dolomitów dewońskich w Józefce w Górach Świętokrzyskich
Coexistence of ore mineralization and hydrocarbons : the example of Devonian dolomites in Józefka in Świetokrzyskie (Holy Cross) Mountains

Autorzy:

Pawlikowski, M.
Nieć, M.

Powiązania:

https://bibliotekanauki.pl/articles/343962.pdf

Data publikacji:

2018

Wydawca:

nakł. Maciej Pawlikowski

Tematy:

dolomity dewońskie
mineralizacja
węglowodory
devonian dolomites
ore mineralization
hydrocarbons

Opis:

Rozpoznano mineralizacje występująca w ciemnych dewońskich wapieniach w kamieniołomie Józefka w miejscowości Górno, koło Kielc. Stwierdzono, że mineralizacja zarówno kruszcowa jak i niekruszcową obecna jest m.in. w systemach spękań wypełnionych węglowodorami. Węglowodory występują w dolomitach także jako substancje rozproszone nadając wapieniom ciemny kolor. W tych wapieniach występują w formie rozproszonej podwyższone ilości m.in. ziem rzadkich. Sposób występowania węglowodorów (forma rozproszona i żyłkowa) oraz wstępne analizy ich składu może sugerować, że mogą to być zarówno węglowodory (pierwotne, rozproszone) jak i wtórne (występujące w formach żyłkowych).
Ore and non – ore mineralization in cracks filled with hydrocarbons in the dark grey Upper-Devonian limestone has been conformed in the Jozefka quarry of Devonian limestones and dolomite in the town Góra near Kielce. Hydrocarbons in dolomite are scattered , giving the limestone a dark colour. The coexistence of ore and hydrocarbon mineralization suggest their common origin.

Źródło:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2018, 25; 101-115
1689-6742

Pojawia się w:

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

One step purification of impurities in the leachate of weathered crust elution-deposited rare earth ores

Autorzy:

Zhou, F.
Feng, J.
Wang, Z.
Xu, Y.
Zhang, Z.
Chi, R.

Powiązania:

https://bibliotekanauki.pl/articles/110333.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

leachate
weathered crust
rare earth ore
leachate purification
precipitation

Opis:

It is necessary to control and reduce the high content of Al3+, Cu2+ and Pb2+ ions in the leachate of weathered crust elution-deposited rare earth ore to facilitate the rare earth recovery and the quality of rare earth products. Neither NH4HCO3 nor Na2S are suitable for removal of all impurity ions and meanwhile maintain high rare earth recovery. Conventionally, NH4HCO3 is firstly adopted to remove Al3+, and then Cu2+ and Pb2+ are removed by using Na2S. This two steps purification process is quite long and results in lots of complication in operation. In this paper, a one-step purification by using the compound of NH4HCO3 and Na2S was proposed to remove Al3+, Cu2+ and Pb2+. The results showed that after purification 89% Cu, 92% Pb and 74% Al were removed from the leachate solution by using 0.1 M compound of NH4HCO3/Na2S, while maintaining 89% rare earth. The optimal purification parameters were: volume ratio of NH4HCO3 to Na2S of 9:1, volume ratio of compound to leachate of 0.05:1, precipitation time of 30 min.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1188-1199
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Phosphate ore washing by Na2EDTA for cadmium removal: Optimization of the operating conditions

Autorzy:

Benredjem, Z.
Delimi, R.
Khelalfa, A.

Powiązania:

https://bibliotekanauki.pl/articles/779151.pdf

Data publikacji:

2012

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

phosphate ore washing
cadmium
environment
extraction
chemical processes
optimization

Opis:

This paper discusses the extraction of cadmium from phosphate ore by the washing method. Various parameters were investigated for the cadmium extraction from phosphate ore. The results from extraction tests showed that cadmium extraction depends on the nature and concentration of the extracting agent, the liquid/phosphate ore ratio, the temperature and the solution pH. The effi ciency of the nine extracting agents for removing cadmium from phosphate ore was found to be in the order: Na2EDTA > citric acid > tartric acid > ammonium citrate > calcium chloride > ammonium acetate > ammonium chloride > oxalic acid > ammonium hydroxide. In this study cadmium extraction kinetics was best described by the product layer diffusion control model.

Źródło:

Polish Journal of Chemical Technology; 2012, 14, 3; 15-20
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Research of nanobubbles enhanced reverse anionic flotation of a midlow grade phosphate ore

Autorzy:

Zhang, Tiebin
Zhang, Qin

Powiązania:

https://bibliotekanauki.pl/articles/2146853.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

nanobubbles
reverse anionic flotation
phosphate ore
dolomite
particle aggregation

Opis:

The reverse anionic flotation is commonly used to upgrade the mid-low grade phosphate ore in China. The mineral characterization of raw ore shows that carbonate and phosphate minerals combined with fine intergrowth, difficulty in upgrading. Flotation using nanobubbles (NBs) can significantly enhance the flotation efficiency of fine particles of minerals. To research the effect of NBs on the flotation process of this phosphate ore, two flotation tests with and without NBs were compared. The results show that the MgO removal had an increment of 10% in the case of NBs flotation versus conventional flotation in the approximate grade and recovery of P2O5. The foam product of NBs flotation had smaller dimensions than the conventional flotation. NBs enhanced the contact angle on dolomite surface from 45.8 ° to 64.5 °, and increases the d50 of dolomite from 20.49 µm to 30.43 µm.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 1; 113--125
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

The effect of high voltage electrical pulses on iron ore comminution to improve desulfurization flotation recovery

Autorzy:

Soltanmohammadi, Vahid
Noaparast, Mohammad
Aslani, Soheila

Powiązania:

https://bibliotekanauki.pl/articles/2146929.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

high voltage electrical pulses
crushing
flotation
desulfurization
iron ore

Opis:

In this research, the effect of employing high voltage electrical pulse (HVEP) on crushing to improve the recovery of iron ore desulfurization was investigated compared to mechanical crushing. To determine the effect of mechanical and electrical crushing, jaw crusher, cone crusher, and high voltage electrical pulse crusher (50Kv) were applied. The results indicated that coarser particles with fewer slimes are produced in the initial crushing stage using electric pulses. Selective separation mechanism from the boundary of the particles based on different dielectric constants, was the main difference between the HVEP method and mechanical crushing. In the flotation process of sulfide minerals crushed by an electric pulse crusher, recovery of the sample was 10.6% higher, and the grade of sulfur in flotation residue of iron ore concentrate was approximately 58% lower than the sample which was undergone through the initial mechanical crushing stage. The obtained results evidenced 37.5% increase in flotation kinetics constant while electric pulse crushing is preferred to mechanical crushing. For mineralogical studies, microparticles (-38 microns) were studied in the pulp phase of the sample, and the results proved that in the electric pulse crushing of the microparticles, they are dispersed, and there is a distance between them, while in the mechanical approach they are formed in the shape of agglomerated particles. This phenomenon leads to better preparation and further possible contact of pyrite particles with air bubbles, which increases flotation kinetics and the recovery of sulfur merely when electric pulse crushing was employed.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 4; art. no. 150264
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Effects of lead nitrate and pre-aeration on the deportment of base/precious metals in cyanide leaching of a pyritic refractory gold concentrate

Autorzy:

Hacı, Deveci
Ersin, Yener Yazıcı
Oktay, Celep
Murat, Mercimek
Cumhur, Demirel
Serkan, Çakmak
Melih, Baki Cingöz
Ömer, Hami Kavlu
Hüseyin, Kömürcü

Powiązania:

https://bibliotekanauki.pl/articles/24085578.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gold
cyanide leaching
pyrite
copper
refractory ore
lead nitrate

Opis:

This study was undertaken to improve gold and silver extraction from a pyritic gold flotation concentrate, which assayed 11 g/t Au, 42 g/t Ag, 0.21% Cu, 3.57% Zn, and 31% Fe. Direct cyanide leaching of the concentrate at 1.5 g/L NaCN yielded a low gold extraction (37%), confirming its refractory nature. Effects of lead nitrate (200-500 g/t Pb(NO3)2) and pre-aeration (24 h) before cyanide leaching at 1.5-3.5 g/L NaCN were investigated. Earlier studies have focused on the impact of these parameters on gold leaching. Besides gold, this study demonstrated the behaviour of silver and base metals (copper and zinc) from the pyritic gold concentrate. Adding lead nitrate had a negligible effect on gold extraction whilst improving silver extraction. Dissolution of copper was substantially suppressed by adding lead nitrate, i.e., from 23% (no Pb(NO3)2) to 4% (500 g/t Pb(NO3)2) over 24 h. Zinc dissolution was negligible (≤0.01%). Pre-aeration of the concentrate improved the gold and silver extractions by 4-14% and 23-44% at the subsequent cyanide leaching (1.5-3.5 g/L NaCN). However, it did not affect the leaching of copper. Only negligible leaching of zinc (≤0.6%) occurred during cyanide leaching. Pre-aeration also reduced cyanide consumption in subsequent cyanide leaching (1.5 g/L NaCN), i.e., from 2.83 kg/t to 2.03 kg/t NaCN per solids. These results suggested that lead nitrate can improve silver extraction while suppressing copper dissolution, which would be advantageous in the leaching-adsorption circuit (CIP), mitigating the dissolved copper-associated problems. Pre-aeration can also be suitable for improved gold/silver extractions and reduced reagent consumption.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 166259
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Studying on mineralogical and petrological characteristics of Gara Djebilet oolitic iron ore, Tindouf (Algeria)

Autorzy:

Chebel, Nassima
Nettour, Djamel
Chettibi, Mohamed
Rachid, Chaib
Khoshdast, Hamid
Hassanzadeh, Ahmad

Powiązania:

https://bibliotekanauki.pl/articles/29551591.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

oolitic iron ore
Gara Djebilet
mineralogical characterization
mineral processing

Opis:

Demand for iron ore worldwide has been steadily increasing which leads to the extraction of iron ore deposits with more complex mineralogies and higher levels of silicon and phosphorus impurities. This is the case in Algeria with the iron ore deposit of Gara Djebilet, Tindouf; where it has recently been exploited to ensure the sufficiency of iron ore required to produce iron and steel products. This deposit has remained unexploited for several decades due to inadequate knowledge of its mineralogy, treatment, and economic assessments. This study aims to find out the microstructure, chemical composition, and mineralogical distribution of valuable minerals and impurities, to understand the efficient processing methods for this specific iron ore. The characterization of representative ironstone samples taken from the studied area was carried out using optical microscopy, X-ray fluorescence spectrometer (XRF), petrographic microscope, X-ray diffractometer (XRD), and scanning electron microscope (SEM) coupled with energy dispersive X-ray spectroscopy (EDS). The results of the mineralogical analyses confirmed that it is an oolitic fine-grained ore consisting of gangue minerals principally composed of quartz, apatite, and iron-rich concentric cored structures. Chemical analyses of the ore indicated that it contains 56.58 wt% Fe with 7.98 wt% SiO2, 7.09 wt% Al2O3, and minor amounts of P2O5, CaO, MgO, and TiO2 compounds. The phosphorus associated was present in both ooids and groundmass, indicating that the ore has a complex texture with very rich and diverse mineralogy. For that, two conceptual scenarios were potentially proposed for processing the studied iron ore, while further detailed automated mineralogical information was required to make sure about the processing units from a practical perspective.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 178382
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 90.

Tytuł:

Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Autorzy:

Biniaz, Gholamreza
Khoshdast, Hamid
Garmsiri, Mohammad Reza
Maleki-Moghaddam, Mostafa
Hassanzadeh, Ahmad

Powiązania:

https://bibliotekanauki.pl/articles/29552037.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

copper ore
bioflotation
rhamnolipid biosurfactant
metallurgical response
surface adsorption

Opis:

The present research work studies the effect of rhamnolipid biosurfactant (RL) produced from Pseudomonas aeruginosa bacteria on the metallurgical response of a copper ore sample flotation through an extensive full factorial experimental design. Key influential factors including feed particle size, pulp solid content, pH, and dosages of collector, frother and RL biosurfactant were considered. The surface activity of the RL biosurfactant was also studied based on a D-optimal experimental design. Surface activity results revealed that increasing pH and electrolyte concentrations negatively impacted the RL surface activity, while the effect of electrolyte source was dependent on their ionic strength. Metallurgical investigations showed that operating parameters significantly influence the copper grade and recovery with considerable interaction among various parameters. RL biosurfactant was found to negatively decrease the copper grade (~0.5%) and positively enhance the recovery (~3%). Effect of RL was attributed to two potential mechanisms, i.e., being ineffective on copper minerals and/or interaction with gangue minerals, as well as increasing the rate of entrainment due to high foamability, both of which increased non-selective recovery of gangue minerals. Interestingly, regardless of the structural similarities, no interaction between the flotation reagents and rhamnolipid was observed. Fourier-transform infrared (FTIR) spectroscopic analysis of copper minerals, both pure and RL-exposed, showed that there was actually no molecular interaction between RL molecules and particle surface.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 183176
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

On the origin of strata-bound Zn-Pb ores in the Upper Silesia, Poland
Komentarz do genezy górnośląskich złóż rud Zn-Pb w utworach triasowych

Autorzy:

Sass-Gustkiewicz, Maria
Dżułyński, Stanisław

Powiązania:

https://bibliotekanauki.pl/articles/27311275.pdf

Data publikacji:

1998

Wydawca:

Polskie Towarzystwo Geologiczne

Tematy:

MVT deposits
age of mineralization
derivation of ore fluids

Opis:

In view of the renewed discussion on the origin of Upper Silesian Zn-Pb ores we give some comments on this subject. In our opinion the recurrently invoked post-Jurassic age of these deposits is at variance with geological facts which point to pre-Jurassic age. The source of metal-bearing solutions could be looked in deeper parts of the Earth’s crust, presumably in Paleozoic rocks, or in older accumulations of ore deposits regenerated during Triassic reorganization of crustal plates.
W nawiązaniu do wznowionej dyskusji nad pochodzeniem i wiekiem górnośląskich złóż rud Zn-Pb autorzy uzasadniają pogląd, że przypisywanie im po-jurajskiego wieku jest sprzeczne z faktami geologicznymi, które wskazują na ich przed-jurajski wiek. Źródeł roztworów metalonośnych można się dopatrywać w głębszych częściach skorupy ziemskiej prawdopodobnie w paleozoicznych skałach, bądź w starszych złożach kruszców, zregenerowanych podczas przemieszczania się kier globalnych w triasie.

Źródło:

Annales Societatis Geologorum Poloniae; 1998, 68, 4; 267--278
0208-9068

Pojawia się w:

Annales Societatis Geologorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Dokumentacja dawnych wyrobisk górniczych na przykładzie górnej sztolni w Marcinkowie
Documentation of former mining works on the example of the upper adit in Marcinków

Autorzy:

Stysz, Michał
Mączka, Michał

Powiązania:

https://bibliotekanauki.pl/articles/2048413.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

górnictwo dawne
Kotlina Kłodzka
Marcinków
rudy srebra
rudy ołowiu
inwentaryzacja sztolni
old mining
Kłodzko Valley
silver ore
lead ore
inventory of adit

Opis:

W artykule przedstawiono historię badań eksploracyjnych i inwentaryzacyjnych przeprowadzonych w latach 2002–2019 w górnej sztolni dawnej kopalni rud srebra i ołowiu St. Anna w Marcinkowie. W wyniku tych badań powstała obszerna dokumentacja fotograficzna i filmowa zachowanego wyrobiska. Przebadano próbki drewna ze sztolni w celu datowania obudowy. Ostatnia inwentaryzacja sztolni w 2019 r. ujawniła postępującą degradację wyrobiska i pozostałości historycznej obudowy.
The article presents the history of exploratory and inventory research carried out in the years 2002–2019 in the upper adit of the former silver and lead mine of St. Anna in Marcinków. As a result extensive film and photographic documentation of the preserved excavation was produced. During the research samples of wood from the adit were collected and tested in order to date the casing. The last visit in the adit in 2019 revealed the progressive degradation of the excavation and the remains of the mining housing. Due to the danger it posed the entrance of the adit was buried.

Źródło:

Hereditas Minariorum; 2020, Vol. 6; 57-66
2391-9450
2450-4114

Pojawia się w:

Hereditas Minariorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Założenia dla nowych projektów wierceń poszukiwawczo-badawczych rud metali w Polsce
Substantial principals of new ore metals prospecting-research drilling projects in Poland

Autorzy:

Mikulski, S.Z.
Speczik, S.

Powiązania:

https://bibliotekanauki.pl/articles/2063089.pdf

Data publikacji:

2010

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

złoto
miedź
molibden
cynk
wanad
złoża rud metali
wiercenia poszukiwawczo-badawcze
gold
copper
molybdenum
zinc
vanadium
metallic ore deposits
ore prospecting
Polska

Opis:

W 2006 r., w Państwowym Instytucie Geologicznym, w ramach zadań statutowych, przeprowadzono analizę prac geologicznych związanych z poszukiwaniem rud metali, w celu opracowania założeń projektu wierceń poszukiwawczo-badawczych dla rozwiązania najistotniejszych zagadnień surowcowych Polski. Zaprojektowanych zostało 20 wierceń poszukiwawczo-badawczych, o całkowitym metrażu ok. 9 tys. m, w tym 12 wierceń płytkich od 70 do 300 m oraz 8 głębokich wierceń od 600 do 1200 m. Opracowano wstępne projekty wierceń poszukiwawczo-badawczych rud: (1) Au w Sudetach i na bloku przedsudeckim, (2) Cu i/lub Au w utworach cechsztyńskich w Sudetach i na peryklinie Żar, (3) Mo–Cu typu porfirowego i (4) Zn–Pb typu MVT, w strefie kontaktu bloku małopolskiego z górnośląskim oraz (5) Ti–V w rejonie Ślęży na bloku przedsudeckim. Realizacja tych projektów wierceń pozwoli zweryfikować perspektywiczność w/w obszarów pod względem surowcowym, a w przypadku uzyskania pozytywnych rezultatów będzie miała podstawowe znaczenie dla dalszych prac poszukiwawczo-dokumentacyjnych. Ponadto umożliwi rozpoznanie budowy geologicznej w tym istotnych formacji rudonośnych.
On the base of Polish Geological Institute detailed analyses of archive geological materials the principals for new ore metals projects were established to solve important questions considering the future metal perspectives in Poland. Twenty location of the foreseen prospecting-research boreholes were selected of total length ca. 9 thousands meters. Among them 12 shallow boreholes from 70 to 300 m deep and 8 boreholes from 600 to 1200mdeep. The geological prospecting-research projects were prepared for the following perspective ores: (1) Auin Sudetes and on the Fore-Sudetic Block, (2) Cu and/orAuin Zechstein sediments in Sudetes and on the Żary Pericline, (3)Mo–Cuof porphyry type and (4) Zn–Pb of MVT type in the contact zone of Małopolska and Górnośląski Blocks (5) Ti–V in the Ślęża region on the Fore-Sudetic Block. The outcome of the considering drilling projects will have important meaning for increasing the perspective metal resources of the country. This project substantially develop recognition of the geological structure including important ore formation in Poland.

Źródło:

Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 333--337
0867-6143

Pojawia się w:

Biuletyn Państwowego Instytutu Geologicznego

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 94.

Tytuł:

Investigating acid mine drainage potential and alteration properties of Zn-Pb wastes from Görgü (Malatya, Türkiye) region

Autorzy:

Sis, Hikmet
Başaran, Basri

Powiązania:

https://bibliotekanauki.pl/articles/24148654.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

degradation of waste ore
acid mine drainage
static test
pyrite

Opis:

Acid mine drainage (AMD) is one of the main causes of environmental threats resulting from mining activities, yet efficient characterization and prediction of AMD potential of wastes play an important role in preventing AMD. In this study, the chemical and mineralogical properties of fresh waste samples, collected from waste ponds of the Görgü (Malatya) zinc-lead ore processing plant, were determined and the results were used to explain its AMD potential. Alteration properties of the wastes in water was investigated by monitoring certain properties of the prepared suspension with respect time. Additionally, pyrite concentrate particles were added into the suspensions at certain proportions to evaluate its effect on the AMD generation and alteration. Analysis and test results showed that the raw waste was rich in carbonate and poor in pyritic sulfur, and hence did not have the AMD generation potential. The pH, electrical conductivity, and metal ions concentrations of the suspension medium were determined at regular intervals, and obtained data were found very beneficial to explain the time-dependent behavior of waste in water. After the depletion of liquid in the suspension, the remained solid residuals were chemically and mineralogically analyzed to compare with raw waste. It was concluded that sufficient aeration and stirring of suspension is required for noticeable alteration of the waste.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 169357
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Ekonomiczna ocena modernizacji układu kruszenia rudy w ZWR Lubin
Analysis of the crushing system in the Lubin ore mine

Autorzy:

Malewski, J.
Paszkowska, G.
Źrebiec, M.

Powiązania:

https://bibliotekanauki.pl/articles/89085.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

przeróbka rud
rozdrabianie
modernizacja
ekonomika
ore processing
crushing
modernization
economics

Opis:

Przedstawiono wyniki analizy efektów ekonomicznych modernizacji układu kruszenia rudy w ZG Lubin. Podstawą tej analizy są wyniki badania efektywności zmian technologii i techniki rozdrabiania i klasyfikacji tego układu opisane w publikacji (Malewski 2015). W niniejszym artykule dokonano oszacowania kosztów inwestycyjnych i operacyjnych tych zmian. Wyniki analizy pokazują opłacalność realizacji takiego projektu. Koszt produkcji (nadawy do młynów prętowych) może być obniżony nawet o 28% w stosunku do stanu zerowego. W szczególności efekt ten jest widoczny, jeśli koszty te powiązane zostaną z uzyskanym większym stopniem rozdrobienia kruszonej rudy, co ma poważny wpływ na efektywność kolejnych operacji rozdrabiania.
The paper presents results of crushing system analysis, that is used as subsystem in the Lubin ore mine processing installation. Crushing effect was measured with average particle size in final crushing product of carbonate (I) and sandstone (II) ore subsystems. Impact of the crushing circuit looping, used to avoid oversize in the final product, as well as effect of modernizing of processing machinery on system efficiency has been studied. Simulations showed that looped circuits, against unlopped, reduce twice the average grain size in the final product. Even the production cost per unit capacity $/m3 is decreased by 28%, or twice of that relating to the size reduction ratio.

Źródło:

Mining Science; 2016, 23, Special Issue 1; 107-114
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Rekonstrukcja paleośrodowiska sedymentacji środkowojurajskich iłów rudonośnych Gnaszyna (Częstochowa) - wyniki wstępne

Autorzy:

Gedl, P.
Kaim, A.
Boczarowski, A.
Kędzierski, M.
Smoleń, J.
Szczepanik, P.
Witkowska, M.
Ziaja, J.

Powiązania:

https://bibliotekanauki.pl/articles/2061399.pdf

Data publikacji:

2003

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

paleośrodowisko
sedymentacja
iły rudonośne
szkarłupnie
paleoenvironment
sedimentation
ore bearing
echinoderms

Źródło:

Volumina Jurassica; 2003, 1, 1; 19-28
1896-7876
1731-3708

Pojawia się w:

Volumina Jurassica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Poszukiwania i rozpoznawanie złóż metali w Mongolii
Prospecting and evaluation of mineral deposits in Mongolia

Autorzy:

Ćwiertnia, T.
Pieczonka, J.
Piestrzyński, A.
Zygo, W.

Powiązania:

https://bibliotekanauki.pl/articles/2063085.pdf

Data publikacji:

2010

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

poszukiwania rud metali
złoża metali
Mongolia
ore prospecting
metalliferous deposits

Opis:

W latach 2007–2009 przeprowadzono w Mongolii szereg badań terenowych, mających na celu poszukiwanie złóż surowców metalicznych. Łącznie spenetrowano pięć różnych obszarów, z których jeden znajdował się na wschód od stolicy, a pozostałe w zachodniej części Centralnej Mongolii (województwo Bayankhongor). Prace polowe polegały na identyfikacji obiektów geologicznych, wstępnej weryfikacji odsłonięć przydatnych do oceny surowcowej badanych obszarów oraz na pobraniu próbek szlichowych, bruzdowych i mineralogicznych. W wielu miejscach stwierdzono obecność utlenionych minerałów miedzi, a w jednym – bogatą w siarczki wychodnię silnie okwarcowanych skał. Na obszarze oznaczonym jako M2, stwierdzono również obecność stref zawierających okruszcowanie typu Ni–Cu w serpentynitach. Analizy chemiczne potwierdziły trafność wyboru miejsc do dalszych badań. Ocenie złożowej poddano również dokumentowane wcześniej złoże W–Sn–Mo Bayantsogt-Tubszin i złoże żyłowe złota Tsagaan Tsakhir Uul.
In the period of 2007–2009 three geological reconnaissance prospecting for metalliferous deposits in five areas of the central part of Mongolia were carried out. Four areas are close to the north edge of the Gobi Desert (Bayankhongor province), and one is located eastwards from the country capitol. All prospecting works were organized by scientist and students from Faculty of Geology, Geophysics and Environmental Protection from AGH-University of Science and Technology in Kraków, Poland. Field works were focused on identification of outcrops, macroscopic recognition of metalliferous mineralization and sampling. As a results, several places containing interesting oxides and sulphides copper mineralization have been found. Within theM2area, places containing Ni–Cu type of occurrences have also been identified. Moreover geological information about Bayantsogt-Tubszin W–Sn–Mo and Tsagaan Tsakhir Uul Au deposits were verified.

Źródło:

Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (2); 289--295
0867-6143

Pojawia się w:

Biuletyn Państwowego Instytutu Geologicznego

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 98.

Tytuł:

Predictive control of the iron ore beneficiation process based on the hammerstein hybrid model

Autorzy:

Porkuian, Olga
Morkun, Vladimir
Morkun, Natalia

Powiązania:

https://bibliotekanauki.pl/articles/970606.pdf

Data publikacji:

2019

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

predictive control
iron ore
beneficiation
Hammerstein model
recursive-parallel model

Opis:

Non-linear, dynamic, non-stationary properties characterize objects of the iron ore beneficiation line. Therefore, for their approximation, it is advisable to use models of the Hammerstein class. As a result of comparing the three models of Hammerstein: simple, parallel and recursive-parallel, it was shown that the best result for identifying the considered processes of magnetic beneficiation of iron ore by the minimum error criterion was obtained using the Hammerstein recursive-parallel model. Hence, it is recommended for the identification of beneficiation production objects.

Źródło:

Acta Mechanica et Automatica; 2019, 13, 4; 262-270
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Mine waters from ore and coal mining in Czech Republic
Wody kopalniane z rudy i kopalni węgla w Czechach

Autorzy:

Heviankova, S.
Klimko, T.
Lusk, K.
Vsetecka, M.
Marschalko, M.

Powiązania:

https://bibliotekanauki.pl/articles/318189.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

wody kopalniane
węgiel
ruda
obróbka
mine waters
coal
ore
treatment

Opis:

Mine waters are quantitatively one of the most important products of mining activities and their negative impact on the environment may be extensive, even long after closing the deposit. The most important producers of mine waters in the Czech Republic are companies mining brown coal (Czech Coal a. s., Severočeské doly a. s. a Sokolovská uhelná, právní nástupce, a. s.) and black coal (OKD a. s.). Furthermore, mine waters are also generated in connection with mining of uranium ore (deposit Rožná) and a great amount comes from already abandoned ore and coal deposits under the control of the state enterprise DIAMO. Depending on the character of mine waters, treatment is required before their discharge into the surface waters. The paper also describes standard treatment technologies and other options of mine water desalination. In addition, the position of mine waters with regard to legislation is briefly summarized.
Wody kopalniane są ilościowo jednym z najważaniejszych produktów działalności kopalni i ich negatywny wpływ na środowisko może być rozległy, nawet na długo po zamknięciu złoża. Najwięcej wody kopalnianej w Czechach produkuje się w firmach wydobywających węgiel brunatny (Czech Coal a.s., Severočeskédoly a. s. a Sokolovskáuhelná, právnínástupce, a. s.) i węgiel kamienny (OKD a. s.). Ponadto, wody kopalniane tworzą się również przy kopalniach rudy uranu (złoże Rožná) i spora jej ilość pochodzi już z opuszczonego złoża oraz złóż węgla będących pod kontrolą przedsiębiorstwa państwowego DIAMO. W zależności od właściwości wód kopalnianych, wymaga się ich oczyszczenia przed wypuszczeniem do wód powierzchniowych. Praca opisuje również standar-dowe technologie i inne opcje odsalania wody. Dodatkowo, w skrócie podsumowane zostają pozycje wód kopalnianych w relacji do rozporządzeń prawnych.

Źródło:

Inżynieria Mineralna; 2015, R. 16, nr 1, 1; 97-102
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 100.

Tytuł:

Ocena wzbogacalności flotacyjnej rudy złota
Assessment of the Gold Ore Floatability

Autorzy:

Krawczykowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/318895.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

ruda złota
flotacja
wzbogacanie grawitacyjne
gold ore
flotation
gravity separation

Opis:

W artykule przedstawiono wyniki wzbogacania rudy złota. Do badań wykorzystano dwie próbki rudy, znacznie różniące się zawartością tego pierwiastka. Zostały one poddane operacjom przygotowawczym, polegającym głównie na głębokim rozdrobnieniu i klasyfikacji. Porównano wyniki wzbogacania flotacyjnego próbek w dwóch różnych układach wzbogacania: bezpośrednio po rozdrobnieniu oraz po wstępnym wzbogaceniu na stole koncentracyjnym. Flotacja okazała się efektywną metodą wzbogacania badanej rudy, uzyskane koncentraty cechują się wysokimi zawartościami złota, natomiast w odpadach pozostały śladowe jego ilości. Ponadto analiza wyników wykazała, że wprowadzenie wzbogacania grawitacyjnego przed procesem flotacji wpłynęło pozytywnie na jakość flotowanych koncentratów.
The article presents the results of gold ore beneficiation process. Two samples of ore, significantly differed in terms of gold content, were utilized for investigations. Samples were subjected the preparatory operations, consisting of fine comminution and classification. There were compared the results of flotational beneficiation obtained in two different processing circuits: directly after grinding and after pre-concentration operation with using the shaking table. The flotation operation has proven to be an effective method of concentration for this type of ore, the obtained concentrates were of a high gold grade, while the gold contents in tails were very low. In addition, the analysis of the results showed that application of gravity concentration prior to flotation process positively influenced the quality of flotation concentrates.

Źródło:

Inżynieria Mineralna; 2017, R. 18, nr 1, 1; 221-226
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

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