Temat: barite - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of modified starch on separation of fluorite from barite using sodium oleate
Autorzy:: Chen, Z.
Ren, Z.
Gao, H.
Qian, Y.
Zheng, R.
Powiązania:: https://bibliotekanauki.pl/articles/109938.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: fluorite
barite
modified starch
flotation
Opis:: In this study, a modified starch was utilized to selectively separate barite from fluorite. The results of flotation tests showed that highly selective separation of fluorite from barite was obtained when 250 mg/dm3 of modified starch and 13.16×10−5 mol/dm3 sodium oleate was used in neutral solutions. FTIR spectra results showed that the modified starch can adsorb on the fluorite and barite surfaces. Zeta potential analyses indicated that the modified starch had little effect on adsorption of sodium oleate on the fluorite surface, although it interfered with the adsorption of sodium oleate on the barite surface. Contact angle measurements results corresponded well with the flotation results.
Źródło:: Physicochemical Problems of Mineral Processing; 2018, 54, 2; 228-237
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Statistical Assessment of the Microstructure of Barite Aggregate from Different Deposits Using X-Ray Microtomography and Optical Microscopy
Autorzy:: Żołek, N.
Ranachowski, Z.
Ranachowski, P.
Jóźwiak-Niedźwiedzka, D.
Kudela, S. jr.
Dvorak, T.
Powiązania:: https://bibliotekanauki.pl/articles/351890.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: barite ore
barite aggregate
microstructure
optical microscopy
thin sections analysis
X-ray tomography
Opis:: Two different barite ore (barium sulfate BaSO4) specimens from different localizations were tested and described in this paper. Analysis of the microstructure was performed on polished sections, and on thin sections using X-ray microtomography (micro-CT), and optical microscopy (MO). Microtomography allowed obtaining three-dimensional images of the barite aggregate specimens. In the tomograms, the spatial distribution of the other polluting phases, empty space as well as cracks, pores, and voids – that exceeded ten micrometers of diameter-were possible to visualize. Also, the micro-CT allowed distinguishing between minerals of different density, like SiO₂ and BaSO₄. Images obtained and analyzed on thin sections with various methods using the optical microscopy in transmitted light delivered additional information on the aggregate microstructure, i.e. allow for estimation of the different kinds of inclusions (like the different density of the minerals) in the investigated specimens. Above methods, which were used in the tests, completed each another in order to supply a set of information on inclusions’ distribution and to present the important differences of the barite aggregate specimens microstructure.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2A; 697-702
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Mechanistic study on the flotation of barite with C18H33NaO2 under microwave radiation based on UV-visible spectrophotometric analysis
Autorzy:: Guo, Jing
Wen, Ming
Wu, Jingxuan
Powiązania:: https://bibliotekanauki.pl/articles/2175439.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: UV-visible spectrophotometer
microwave
barite
flotation mechanism
Opis:: Based on the pure mineral flotation tests of barite, this study investigated the effect law of microwave on barite flotation by using a UV-visible spectrophotometer (L5), solution chemistry calculation, and zeta potential, scanning electron microscope (SEM), and other testing methods. Additionally, red flotation kinetic analysis was carried out to deeply explore the mechanism of C18H33NaO2 flotation of barite under microwave radiation. Mineral flotation tests showed that after microwave treatment, the flotation recovery of barite and deionized water increased by 2.67% and 3.35%, respectively, while that of the microwave action pulp and chemically added pulp decreased by 2.90% and 8.51%, respectively. Microwave action on barite can improve its flotation recovery (up to 95.27%). The action of microwave heating can improve the positive electrical properties of the surface of barite, and accordingly, its specific surface area would be enlarged. In this case, the adsorption rate of sodium oleate on the surface of barite increased, thereby improving the flotation recovery. The flotation kinetics analysis revealed that the k-value of the primary kinetic model was the most informative among the four models of flotation kinetics, and its fitting results can truly reflect the flotation results of barite before and after the microwave action. Through the analysis of barite flotation adsorption experiment under microwave action and with sodium oleate as a collector, this study revealed the mechanism of C1818H33NaO2 on barite flotation under a microwave roaster. This study provides an important reference for the research on efficient barite flotation.
Źródło:: Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 156349
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The flotation separation of barite-calcite using sodium silicate as depressant in the presence of sodium dodecyl sulfate
Autorzy:: Chen, Xiong
Gu, Guohua
Liu, Donghui
Zhu, Renfeng
Powiązania:: https://bibliotekanauki.pl/articles/110272.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: flotation
calcite
barite
sodium dodecyl sulfate
sodium silicate
Opis:: The flotation separation of barite from calcite using sodium dodecyl sulfate (SDS) as the collector and sodium silicate (SS) as the depressant has been concretely studied in this paper. The results show that SDS has high collecting ability for both barite and calcite and that the flotation separation of barite from calcite cannot be achieved by using SDS alone. The depressant sodium silicate has a selective depression effect on calcite by the control of the pulp pH at 9.0 in the presence of SDS. Through locked cycle tests, a concentrate containing 95.54% BaSO4 can be obtained from an actual ore containing 24.5% BaSO4, with a recovery of 86.11%. The zeta potential measurements, adsorption analysis and infrared spectrum studies reveal that the pre-adsorption of sodium silicate strongly favors the adsorption of SDS on the calcite surface and adversely affects SDS adsorption on the barite surface. This property is the reason for the selective depression of SS on calcite.
Źródło:: Physicochemical Problems of Mineral Processing; 2019, 55, 2; 346-355
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Selected methods of measuring drilling mud settling
Autorzy:: Zwierzyński, A.J.
Wróblewski, T.
Wiśniiowski, R.
Stryczek, S.
Powiązania:: https://bibliotekanauki.pl/articles/298589.pdf
Data publikacji:: 2014
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: particle settling
barite sag
drilling muds
drilling fluids
Opis:: Methods of measuring settling rate of drilling muds have been selected and the basic theoretical data on this process are addressed in the paper. A brief discussion is also given on the negative influence of settling in drilling mud on the stability of wellbore and formation of potential drilling complications. The results of an analyses of the settling processes taking place in oil-based muds made according to 8 recipes are presented. The direct weighing method has been used in the measurements.
Źródło:: AGH Drilling, Oil, Gas; 2014, 31, 4; 471-483
2299-4157
2300-7052
Pojawia się w:: AGH Drilling, Oil, Gas
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Geological survey and exploration of baryta deposit UMM Gerad
Badania geologiczne i wydobycie barytu ze złoża UMM Gerad
Autorzy:: Corej, P.
Pinka, J.
Sidorova, M.
Powiązania:: https://bibliotekanauki.pl/articles/299993.pdf
Data publikacji:: 2008
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: baryt
projekt
badania
UMM Gerad
barite
project
survey
Opis:: About 95% of the approximately 4-6 million t/y of baryta consumed worldwide is used as a weighting agent in the drilling fluid or "mud" for drilling deep wells by the rotary method. The balance is consumed in a variety of minor uses including functional, white, high-density filler in rubber goods, paper, etc., a source of chemical barium for glass and ceramics, a feedstock for various barium chemicals, and an ingredient in pharmaceuticals and food additives. Although barite is a fairly common, low priced mineral produced in more than 40 countries, there is extensive international trade designed to deliver large quantities to drilling regions such as the Middle East and North Sea. In many cases, baryta is shipped in a semi-crude form and ground to specification close to the point consumption, often by international drilling supply companies such as MI Drilling Fluids or Baroid.
Około 95% światowej rocznej konsumpcji barytu (4-6 mln t) wykorzystywanych jest jako środek obciążający do produkcji płuczek wiertniczych lub zaczynów do obrotowego wiercenia głębokich otworów. Baryt ma wiele pomniejszych zastosowań, w tym do produkcji funkcjonalnych białych, gęstych wypełniaczy produktów gumowych, papieru itp., jest źródłem baru używanego do produkcji szkła i ceramiki, stanowi podstawę do produkcji różnych wyrobów chemicznych na osnowie baru, jak również do wyrobu farmaceutyków i dodatków spożywczych. Mimo że w ponad 40 krajach baryt jest stosunkowo popularnym i tanim minerałem, to istnieje szeroki rynek skierowany na dostawy dużych ilości barytu do takich obszarów naftowych, jak np. Bliski Wschód czy Morze Północne. W wielu przypadkach baryt jest wysyłany przez takie międzynarodowe kompanie jak MI Drilling Fluids czy Baroid w półprzetworzonej postaci, zgodnie z zamówieniem, i dostarczony maksymalnie blisko miejsca wykorzystania.
Źródło:: Wiertnictwo, Nafta, Gaz; 2008, 25, 2; 227-234
1507-0042
Pojawia się w:: Wiertnictwo, Nafta, Gaz
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Bioavailability of barium to Trifolium pratense L. in soils contaminated with drill cuttings
Autorzy:: Kujawska, J.
Pawłowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/2082640.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: barium
barite
drilling waste
bioavailability
transfer factor
translocation index
Opis:: Barium sulphate is the basic component of drilling fluids. Due to the widespread use of drilling processes there is a fear that barium will appear in the environment and that it may become available to plants in different conditions. In this study the bioavailability of barium in soil with the addition of drill cuttings was examined using red clover (Trifolium pratense L.) in a pot experiment. The barium concentration in the examined soils, determined by an inductively coupled plasma mass spectrometry method, was in the range 56-15 800 mg kg-1, depending on the dose of the drill cuttings (2.5-15% of dry weight) added to the mineral soil (control sample). The addition of drilling waste to the soil (pH 4.1, total exchangeable bases 2.1) significantly changed the physicochemical properties of the soil, increasing the pH (up to 7.1) and the concentration of alkaline cations (total exchangeable bases up to 51.2 cmol kg-1). The biomass production in the soil containing drill cuttings was higher compared to the control sample, but the maximum biomass level was found in soil with a 5% dose of the waste. Plant shoot biomass production and the concentration of barium in shoots and roots were closely related to the concentration of barium in the soil. Higher concentrations of barium were found in the roots. Red clover showed a marginal accumulation of barium (transfer factor 0.02-0.08).
Źródło:: International Agrophysics; 2019, 33, 4; 417-426
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Dewatering of barite clay wastewater by inorganic coagulants and co-polymer flocculants
Autorzy:: Deniz, V.
Powiązania:: https://bibliotekanauki.pl/articles/109684.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: dewatering
sedimentation
inorganic coagulant
co-polymer flocculants
wastewater
barite
Opis:: This work is focused on dewatering of barite-containing clay waste from a barite beneficiation plant by coagulation and flocculation to enhance the dewatering rate and recycling of process water. A flocculation performance of co-polymers (Superfloc A-130 and A-100) was compared with coagulants (Al2SO418H2O, CaCl2 and FeCl36H2O). The best results were obtained with an anionic co-polymer, i.e. Superfloc A-130. The settling rate increased 635-fold in the case of using anionic co-polymer Superfloc A-130 in comparison with the natural settling rate of the same wastewater. In laboratory tests, an optimum thickener design was developed for the barite clay wastewater. In this paper, sedimentation studies on the barite clay wastes are presented for the first time, both as the laboratory studies and industrial applications.
Źródło:: Physicochemical Problems of Mineral Processing; 2015, 51, 1; 351-364
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Argentopentlandite from barite vein in Zagórze Śląskie, Lower Silesia; a first occurrence in Poland
Autorzy:: Piestrzyński, Adam
Kowalik, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/127633.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mineralogiczne
Tematy:: argentopentlandite
barite vein
Góry Sowie Gneiss Massif
Zagórze Śląskie
Opis:: Argentopentlandite has been found in samples collected on the dump of the Michael mine, an old silver mine in Zagórze Śląskie in the northern part of the Góry Sowie mountains. Though argentopentlandite is not a very common mineral, it is well known from high-temperature hydrothermal veins and from Ni-Cu deposits hosted in ultramafic rocks also containing platinum-group minerals. The argentopentlandite has been recognized in a sulphide nest in association with pyrrhotite and chalcopyrite in massive barite. In comparison to other occurrences (see Table 2), this mineral is characterized by a low Ni content (ave. 16.02wt% - EDS; 16.43wt% - WDS), a lack of cobalt and a relatively high copper content (ave. 2.13wt% - EDS; 1.55wt% - WDS). Based on these data, it can be concluded that the argentopentlandite, and the associated sulphides, were precipitated from hydrothermal fluids shortly after barite, the major vein constituent. As the optical properties of the argentopentlandite in reflected light are rather similar to those of bornite, it can be overlooked during routine observations. Thus, argentopentlandite or associated ore mineralization may also occur in other barite veins in the area.
Źródło:: Mineralogia; 2014, 45, 1/2; 13-25
1899-8291
1899-8526
Pojawia się w:: Mineralogia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Estimation of grade and recovery in the concentration of barite tailings by the flotation using the MLR and ANN analyses
Autorzy:: Deniz, Vedat
Umucu, Yakup
Deniz, Orcun T.
Powiązania:: https://bibliotekanauki.pl/articles/2146934.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: barite
tailing
flotation
recovery
grade
MLR model
ANN model
Opis:: This study aimed to find optimal models in a comparative framework to estimate the recovery and grade of barite concentrate obtained from the rougher flotation of the barite tailings. Therefore, firstly, the effect of four operating parameters (flotation time, pH, collector dosage, and depressant dosage) on the rougher flotation of the barite tailings containing 37.23% BaSO4 was experimentally investigated. Secondly, two models called the multivariable linear regression (MLR) and the artificial neural network (ANN) were used for the estimation of the recovery and grade of the barite concentrate for the rougher flotation optimization. The R2 values found from the MLR and ANN models were 0.828 and 0.995 for the concentrate recovery, and 0.977 and 0.960 for the barite concentrate grade, respectively. In the comparison of the models determined, it was found that the ANN model expressed quite well than the MLR models, especially for the recovery of the rougher concentrate.
Źródło:: Physicochemical Problems of Mineral Processing; 2022, 58, 5; art. no. 150646
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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