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    Wyświetlanie 1-33 z 33
    Tytuł:
    The mechanism study on aryl-substituted aromatic acid ionic liquid as the collector for quartz flotation
    Autorzy:
    Li, Haonan
    Mei, Guangjun
    Yu, Mingming
    Cheng, Qian
    Zhu, Guobin
    Powiązania:
    https://bibliotekanauki.pl/articles/109922.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ionic liquid
    flotation collector
    quartz
    magnetite
    Opis:
    An aryl-substituted aromatic acid ionic liquid (M-X) was synthesized through hexadecyl trimethyl ammonium bromide and sodium salicylate, and it was employed as a flotation collector for the separation of quartz from magnetite. Laboratory flotation studies of magnetite and quartz were conducted using the M-X and dodecylamine (DDA) as collector. The results showed that the M-X has a stronger collecting ability and selectivity for quartz without starch. The adsorption mechanism of M-X on quartz and magnetite surfaces was studied by Fourier transform infrared spectroscopy (FTIR), zeta potential and X-ray photoelectron spectroscopy (XPS) analysis. Results indicated that the adsorption of M-X on the quartz surface was more efficient than that on the magnetite surface. And the salicylate anion in M-X was found to have depression effect to magnetite.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1239-1249
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flotation of zinc oxide ore using cationic and cationic-anionic mixed collectors
    Autorzy:
    Mehdilo, A.
    Irannajad, M.
    Zarei, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/110700.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation
    smithsonite
    collector
    mixed collector
    zinc
    Opis:
    Flotation of smithsonite coming from a cerussite flotation circuit was investigated using Armac C and Armac T as cationic collectors and their mixtures with potassium amyl xanthate (KAX) as an anionic collector. Under optimum condition using Armac T with sodium hexamethaphosphate as a de-pressant, a smithsonite concentrate with 42% Zn and 89.6% recovery is obtained while in the presence of sodium silicate depressant Armac C produces a concentrate containing 40.8% Zn with 92.5% recovery. However, Armac T acts a little more selectively than Armac C but their mixture with KAX act inversely. The KAX-Armac C mixed collector improves the Zn grade and recovery of the flotation concentrate while KAX-Armac T does not. At the mixture ratio of KAX - Armac C 2:1, the amine collector consump-tion is decreased and an optimal concentrate with 94% recovery and 43% Zn grade is obtained without any gangue depressant reagents.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 1; 145-156
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation and optimization of use of anionic collectors in direct flotation of bauxite ores
    Autorzy:
    Liu, C.
    Feng, A.
    Guo, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/110801.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    bauxite
    collector
    direct flotation
    Opis:
    Bauxite is the main raw material for the alumina industry. Direct flotation is the most widely used method for bauxite beneficiation. In this study, a large number of direct flotation tests were carried out using several anionic reagents. The testing concluded that vegetable oil acid (VOA), naphthenic acid (NA) and lauryl polyoxyethylene phosphate (AEP12) were the three outstanding collectors for bauxite direct flotation. ZMC collector was mixed and prepared using VOA, NA and AEP12, in which the mass ratio of VOA, NA and AEP12 was 1:1:0.5. When processing the bauxite ores of the mass ratio of Al2O3 to SiO2 (A/S) = 4.99, the A/S of the final concentrate was 7.08 and the recovery of Al2O3 was 90.22%. When processing ores of A/S = 4.5, the A/S of the final concentrate was 7.04 and the recovery of Al2O3 was 92.16%. Thus, it can be seen that properties and behaviors of the ZMC reagent were remarkable and met the demands of the “Lime-Bayer Process”.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 2; 932-942
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aerosol collector addition in flotation – evaluation of delivery options
    Autorzy:
    Forbes, Liza
    Brill, Candice
    Verster, Isabella
    Powiązania:
    https://bibliotekanauki.pl/articles/24291646.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    aerosol collector
    flotation
    reagent addition
    Opis:
    In conventional flotation systems, the collector is adsorbed onto mineral particles from the aqueous phase at the solid/liquid interface. Aerosol collector addition is a concept whereby collector molecules are introduced to mineral surfaces via the surfaces of bubbles or the solid/gas interface. Several studies have demonstrated this concept, ranging from the analysis of ideal mineral surfaces to laboratory-scale flotation of complex water systems. However, the physical addition of a collector to the surfaces of bubbles is not a common process and has no uniform methodology. If aerosol collector addition is to be studied as a viable reagent addition technique, it becomes necessary to develop and test appropriate methods that could be replicated across several different studies. This work examines two aerosol addition methods: a conventional Venturi-style gas liquid nozzle, as well as a purpose-built atomiser developed for use in pharmacological applications. Both were compared to a standard “upfront conditioning” batch dosage method and were found to be safe, simple to use and produced comparable flotation outcomes.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 174475
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reverse flotation of ultrafine magnetic concentrate by using mixed anionic/cationic collectors
    Autorzy:
    Lu, D.
    Hu, Y.
    Li, Y.
    Jiang, T.
    Sun, W.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/110550.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ultrafine magnetite
    collector mixture
    reverse flotation
    closed flotation
    Opis:
    Compared to reverse cationic flotation, the advantages of reverse anionic flotation include relatively lower sensitivity to slimes and lower reagent cost. Besides, anionic collectors were found to have excellent capability of selectively separating an ultrafine magnetite ore. Addition of a small amount of cationic collector into the anionic collector as the collector mixture can improve the metallurgical results of removing silicates in reverse flotation. In this paper, NaOL and DDA were used for reverse flotation of the ultrafine magnetic concentrate. The separation performance of the collector mixture was investigated at different ratios of NaOL and DDA. The results showed that a better separation performance was obtained for the collector mixture than for NaOL alone. There was an optimal molar ratio between NaOL and DDA equal to 10:1. In the flotation system with the presence of the collector mixture, the good selectivity was found when starch was used as a depressor for magnetite and CaO was used as an activator for quartz. The influences of starch and CaO dosages on the separation performance of magnetite, quartz and chlorite had been investigated through micro-flotation tests. The infrared spectral analysis showed stretching vibration peaks of chemical adsorption of the collector mixture on the magnetite surface. The peaks were not present when starch was used as the depressor for magnetite. The closed flotation tests on the magnetic concentrate with the particle size of -25 μm were performed in the laboratory. The Fe concentrate assaying 64.52 % was obtained with Fe recovery of 80.66%, for the Fe content of feed equal to 52.98%.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 724-736
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of a novel hydroxamic acid flotation collector and its flotation separation of malachite against quartz
    Autorzy:
    Sun, Xin
    Huang, Lingyun
    Wu, Dandan
    Hu, Bo
    Zhang, Mei
    Li, Yaming
    Tong, Xiong
    Powiązania:
    https://bibliotekanauki.pl/articles/2146909.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation
    collector
    malachite
    hydroxamic acid
    direct flotation
    adsorption
    Opis:
    This paper proposes a promising chelating collector, phenyl propyl hydroxamic acid (BPHA), to directly float malachite for the separation of malachite against quartz. The flotation performance and mechanism was investigated via microflotation tests, as well as through contact angle, Scanning Electron Microscopeand Energy Dispersive Spectrometer (SEM–EDS), zeta potential, adsorption capacity, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) analyses. The results of microflotation tests showed that BPHA has a strong ability to collect malachite and a significant selectivity against quartz. The contact angle tests showed that BPHA effectively adsorbed onto the mineral surface and could improve the hydrophobicity of the malachite surface. SEM–EDS and adsorption capacity analyses further indicated that BPHA adsorbed onto the surface of malachite. The FR-IR results suggested that BPHA could react with Cu2+ ions and facilitate strong chemical adsorption onto the surface of malachite. Furthermore, zeta potential and XPS analyses provided clear evidence that BPHA exhibited a stronger affinity for malachite and a weaker interaction with quartz.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 4; art. no. 149427
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flotation of molybdenite in the presence of microemulsified collector
    Autorzy:
    You, X.
    Li, L.
    Lyu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/109765.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    molybdenite
    flotation
    microemulsified collector
    diesel
    Opis:
    In this paper molybdenite flotation using microemulsified collector was reported. The flotation performance of microemulsified collector and conventional diesel was compared. This study is a prelimi-nary investigation which uses pure molybdenite mineral in a modified Hallimond tube. The pH tests showed that the highest recovery of molybdenite in the presence of diesel and microemulsion was ob-tained at pH=6, reaching the recoveries of 93% and 90%, respectively. In the case of obtaining similar results, it was observed that the microemulsion consumption was lower in comparison to diesel. In the flotation tests with microemulsified collector the recovery slightly decreased because too large collector amount caused formation of more unstable bubbles. The contact angle measurements showed that the microemulsified collector was more effective for increasing the hydrophobicity of molybdenite surface. An adsorption model was proposed and it was suggested that the non-ionic surfactant present in the mi-croemulsified collector formed a continuous bimolecular layer, resulting in the increased surface hydro-phobicity. The accomplishment of this research demonstrated the viability of the use of microemulsified collector in molybdenite flotation, attempting to simplify the molybdenite flotation process, especially replace the conventional emulsified collector with high energy consumption and difficult storage.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 333-341
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eliminating the adverse effect of the lime on the gold-bearing pyrrhotite flotation using the isopentyl xanthate as collector at low alkalinity
    Autorzy:
    Yang, Wei
    Wang, Qian
    Wang, Yaping
    Dong, Ping
    Powiązania:
    https://bibliotekanauki.pl/articles/110148.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    pyrrhotite
    flotation
    pH regulator
    collector
    Opis:
    Flotation optimal conditions and mechanism of regulator lime, isopentyl xanthate and butyl xanthate on pyrrhotite were investigated by flotation test, contact angle, zeta potential and infrared spectroscopic analysis. It is found that there is a certain relationship between the regulator lime and the collector isopentyl xanthate. The results of flotation indicate that lime can indeed inhibit pyrrhotite, and isopentyl xanthate can decrease the depression effect of lime on pyrrhotite in low alkalinity. The results of adsorption mechanism of lime and isopentyl xanthate show that after lime adsorbed on the pyrrhotite surface, Ca 2+inhibit the adsorption of collector with the form of Ca(OH) 2 precipitates. Compared with butyl xanthate, isopentyl xanthate could reduce the generation of hydrophilic Ca(OH) 2 and generate less hydrophilic CaCO3 as well to decrease the negative effect of gold-bearing pyrrhotite flotation depressed by lime.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1250-1258
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on the effect of active pyrite on flotation of porphyry copper ores
    Autorzy:
    Molaei, N.
    Hoseinian, F. S.
    Rezai, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/109515.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flotation
    optimization
    collector
    chalcopyrite
    active pyrite
    Opis:
    Active pyrite is one of the most undesirable phenomena in the flotation of porphyry copper ores. Misreported pyrite into copper concentrates decreased the grade and recovery of copper. In this study, the effective parameters on the flotation process including grinding condition and chemical parameters were evaluated in order to decrease the active pyrite recovery by flotation. Firstly, optical microscopic and grinding studies were carried out to determine the optimal particle size and grinding time. The results showed that 43 minutes of grinding is necessary to achieve the optimum liberation degree of 53 µm for flotation. Then, the flotation effective parameters such as pH (7.3, 10, 10.5, 11, 11.5 and 12), collector type (Nascol, Aero 407, Aero 3477 and X231), collector concentration (12 and 25 mg/dm3), depressant concentration (0 and 25 mg/dm3) and frother concentration (0 and 25 mg/dm3) were investigated in a Denver-type laboratory flotation cell with a constant capacity of 2.5 dm3. The results showed that the optimal conditions for chalcopyrite flotation were pH of 11.5, Aero 407 as a collector with concentration of 25 mg/dm3, Dowfroth 250 (DF250) as a frother with concentration of 25 mg/dm3 and Na2SO3 as a depressant with concentration of 25 mg/dm3. The type of collector had greater effect on the chalcopyrite flotation than the other parameters. The recovery and grade of chalcopyrite and pyrite were obtained as 79.95%, 49% and 5.3%, 7.98% using the Aero 407, respectively. Under the optimum conditions, the grade of final concentrate increased from 0.94% to 21.3% with three cleaner stages.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 3; 922-933
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Research on the mechanism of a mixed collector onto magnesite surface to improve the flotation separation of magnesite from hornblende
    Autorzy:
    Wang, Enlei
    Li, Xiaoan
    Dai, Shujuan
    Li, Zhao
    Zhao, Tonglin
    Song, Baoxu
    Han, Baisui
    Powiązania:
    https://bibliotekanauki.pl/articles/1445774.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    magnesite
    hornblende
    mixed collector
    flotation separation
    Opis:
    Low-grade magnesite is not effectively used mainly due to high silicon content, especially the separation of magnesite and hornblende. In this research, a novel mixture of sodium oleate and dodecyl phosphate collector was used to increase the flotation difference between magnesite and hornblende. Artificially mixed mineral concentrates grade 47.10% (MgO content) concentrate recovery of 84.45% was obtained by micro flotation test, the results showed that the mixed collector of sodium oleate and dodecyl phosphate played a better selective promotion role in the flotation of magnesite. The interaction mechanism of this mixed collector with hornblende and magnesite surfaces was investigated using Fourier transform infrared spectroscopy (FTIR), zeta potential, and X-ray photoelectron spectroscopy (XPS), which showed that the mixed collector in terms of magnesium selection was mainly adsorbed on these magnesium sites of magnesite, and the surface of magnesite thus became hydrophobic, allowing magnesite to float and separate from hornblende.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2021, 57, 4; 125-138
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved flotation of auriferous arsenopyrite by using a novel mixed collector in weakly alkaline pulp
    Autorzy:
    Wang, Xiaohui
    Zhao, Kaile
    Bo, Hui
    Yan, Wu
    Wang, Zhen
    Gu, Guohua
    Gao, Zhiyong
    Powiązania:
    https://bibliotekanauki.pl/articles/1845220.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    gold mine
    arsenopyrite
    mixed collector
    flotation
    Opis:
    The purpose of using a mixed collector is to increase both flotation efficiency and selectivity. The mixed collector of potassium isopentyldithiocarbonate and N-dodecyl mercaptan exhibits high efficiency for the flotation of auriferous arsenopyrite, and the 2:1 mixing mass ratio of potassium isopentyldithiocarbonate and N-dodecyl mercaptan is preferred. Batch flotation tests indicate that a concentrate with the grade of 47.58 g/Mg Au and the recovery of 86.45% Au is achieved by using the mixed potassium isopentyldithiocarbonate/N-dodecyl mercaptan in weakly alkaline pulp. The collector mixture potassium isopentyldithiocarbonate + N-dodecyl mercaptan has greater adsorption density on the arsenopyrite surface than other conventional mixed collectors. The mixed potassium isopentyldithiocarbonate/N-dodecyl mercaptan can adsorb onto the arsenopyrite surface by intense chemisorptions, and the Sulfur-Iron chemical complexation is considered as the main adsorption mode. This is the reason why mixed potassium isopentyldithiocarbonate and N-dodecyl mercaptan collector can improve the flotation efficiency of auriferous sulfides.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 5; 996-1004
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Beneficiation and upgrading of Jordanian oil shale
    Autorzy:
    Gougazeh, Mousa Hasen
    Powiązania:
    https://bibliotekanauki.pl/articles/2146895.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Sultani oil shale
    flotation
    collector
    frother
    Opis:
    Evaluation possibility of a low-quality Jordanian oil shale from Sultani, central Jordan as an alternative clean fuel by flotation technique was investigated. Oil shale sample was characterized with mineralogical and chemical analysis. X-ray fluorescence spectrometer, X-ray diffraction and Fourier transform infrared spectroscopy showed that calcite is the dominant mineral followed by quartz mineral. Other minerals such as apatite and gypsum were detected. Thermogravimetric analysis revealed that mass loss is due to organic matter decomposition at 280–600°C and carbonate decomposition at 650–850°C Fourier transform infrared analysis showed the main organic groups. The effects of collector and frother doses, pulp concentration and pulp pH on the flotation performance were investigated. The kerosene and MIBC were used as collecting and frothing agents, respectively. The optimal flotation performance occurred for a collector dosage of 1000g/t, a frother dosage of 600g/t, a pulp concentration of 20g/L, a pulp pH of 4.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 3; art. no. 147092
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A nanoparticle cationic polystyrene-co-poly(n-butylacrylate) collector to eliminate the negative effect of lizardite slimes in pyrite flotation
    Autorzy:
    Ai, Guanghua
    Liu, Cheng
    Zhu, Guangli
    Yang, Siyuan
    Powiązania:
    https://bibliotekanauki.pl/articles/24085927.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    nanoparticle collector
    pyrite
    lizardite slimes
    flotation separation
    Opis:
    Lizardite slime coating is one of significant factors in the deterioration of the floatability of sulphide minerals. In this study, a nanoparticle cationic polystyrene-co-poly(n-butylacrylate)(PS-PBNH) collector was introduced to eliminate the negative impact of lizardite slimes in pyrite flotation. Microflotation results demonstrated that lizardite slims did not affect the recovery of pyrite in the presence of PS-PBNH. Good flotation separation of pyrite from lizardite was achieved when the nanoparticle PS-PBNH collector was used. The results from adsorption study indicated that PS-PBNH exhibited a significant adsorption on the pyrite surface in the presence of lizardite slimes. Sedimentation tests showed that hetero-aggregation occurred between lizardite slimes and pyrite, whereas the introduction of PS-PBNH collector resulted in a heterogeneous dispersion between them. Zeta potential measurements suggested that PS-PBNH collector interacted with pyrite surface, and the PS-PBNH adsorption changed the surface charge of pyrite from negative to be positive. As a result, the interaction of pyrite with lizardite shifted from electrostatic attraction to electrostatic repulsion, as supported by the DLVO calculations. These results indicated PS-PBNH can be used as a potential collector for pyrite flotation in pyrite/lizardite slimes system without the need for a depressant.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 3; art. no. 170899
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption behavior and mechanism of an ether amine collector on collophane and quartz
    Autorzy:
    Fang, Ji
    Ge, Yingyong
    Yu, Jun
    Powiązania:
    https://bibliotekanauki.pl/articles/109589.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    adsorption
    collophane
    collector
    ether amine surfactant
    flotation
    Opis:
    The adsorption behaviors of an ether amine surfactant, N1-(3-((8-methyl-nonyl)oxy) propyl)propane-1,3-diamine, on collophane and quartz were studied. Batch adsorption experiments were conducted to characterize the thermodynamic behavior of the adsorption process and to calculate the maximum adsorption. Results demonstrated that the adsorption of the ether amine on quartz was greater than collophane. Adsorption mechanisms were studied by means of contact angle measurement, zeta potential measurement, FT-IR analysis, and X-ray photoelectron spectroscopy. The results showed that the adsorption of the ether amine surfactant on quartz surface was easier and more efficient than collophane. Micro-flotation tests testified that the collector can efficiently separate collophane from quartz at room temperature in neutral medium.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 1; 301-310
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of single and mixed reagent systems on improved diaspore recovery
    Autorzy:
    Jiang, Hao
    Xiang, Guoyuan
    Gao, Ya
    Khoso, Sultan Ahmed
    Peng, Weiwen
    Powiązania:
    https://bibliotekanauki.pl/articles/110867.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    diaspore
    flotation
    mixed collector
    froth stability
    adsorption
    Opis:
    Frothing performance and stability of sodium oleate (NaOL) alone and in presence of methyl isobutyl methanol (MIBC), octanol (OCT) and polyethylene glycol (PEG) systems were studied and compared in order to enhance flotation separation of diasporic bauxite ore. Performance of a single (NaOL) and mixed systems (NaOL-MIBC, NaOL-OCT, NaOL-PEG) was evaluated through flotation tests, three-phase dynamic froth stability tests, zeta potential measurements and adsorption analysis. The mixed systems showed a stable froth and an improved recovery with their descending order NaOLPEG˃NaOL-OCT ˃ NaOL-MIBC. Adsorption analysis and zeta potential measurements suggested that, except NaOL adsorption, there was no significant co-adsorption of alcohols on the diaspore surface. However, adsorbed amount of NaOL on the diaspore surface was extremely high; accounts for more than 90% of the total substance used in the pulp.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1179-1191
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Visual presentation of the correlation between solid (mineral) surface free energy and its wettability by flotation tests using the Hallimond tube
    Autorzy:
    Hołysz, Lucyna
    Chibowski, Emil
    Powiązania:
    https://bibliotekanauki.pl/articles/2079884.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    Flotation activity
    Mineral
    Collector
    Work of water spreading
    Opis:
    This paper presents earlier published results, as well some new ones, of the flotation tests carried out with the help of a Hallimond tube for several different apolar and polar minerals. This is to depict the relationship between mineral surface free energy and its flotability. Although the thermodynamic condition for the efficient flotation of a mineral is well known, this paper prompts the not-acquainted readers to get familiar with the fundamental thermodynamic relationships involved in the wetting processes and to learn about usefulness of the simple flotation experiments for this purpose. This relationship between the flotation recovery of a mineral and the work of water spreading on the mineral surface is clearly illustrated. The work of spreading is the difference between the work of adhesion and the work of water cohesion. This work has to be negative to carry out an efficient flotation of a mineral sample. Thus, the purpose of this paper is to show that the simple Hallimond tube is a very useful tool for studying solid (mineral) surface hydrophobic/hydrophilic character under the kinetic conditions.
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2019, 74, 2; 1-24
    2083-358X
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationship between flotation and Fe/Mn ratio of wolframite with benzohydroxamic acid and sodium oleate as collectors
    Autorzy:
    Yang, S.
    Feng, Q.
    Qiu, X.
    Gao, Y.
    Xie, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/109666.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wolframite
    flotation
    collector mixture
    benzohydroxamic acid
    sodium oleate
    Opis:
    Several studies revealed that flotation of wolframite changes with different Fe/Mn ratios, but they did not reach a consensus. This relationship in the presence of benzohydroxamic acid (BHA) and sodium oleate (NaOl) as collectors was studied in this paper through comparison of probability distribution curve of wolframite with different Fe/Mn ratios between the raw ore and the flotation concentrate, the pure mineral flotation and solution chemistry of flotation. The results showed that wolframite with high Fe/Mn ratio showed higher flotation with BHA as a collector while the flotation behavior of wolframite was completely opposite with NaOl as a collector. Besides, the calculations of chemical equilibrium in the solution were plotted as ΔG°-pH graphs. The results revealed that the flotation of wolframite may be determined by the interaction between BHA and ferric(II) ion or between NaOl and manganous ion. From the perspective of collector mixture, the results also explain the high collecting capability of the BHA/NaOl collector mixture, which can be defined as “functional complementation”.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 2; 747-758
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    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
    Artykuł
    Tytuł:
    The removal of dolomite from collophane using reverse flotation process enhanced by compound collector
    Autorzy:
    Liu, Liu
    Tian, Mengjie
    Deng, Xiangyi
    Luo, Huihua
    Chi, Ruan
    Wu, Kang
    Powiązania:
    https://bibliotekanauki.pl/articles/2200338.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    collophane
    dolomite removal
    reverse flotation
    compound collector
    SDS
    Opis:
    To improve the magnesia removal effect of collophane and increase the P2O5 grade of phosphorus concentrate, the fatty acid collector mixed with sodium dodecyl sulfate (SDS) was used as the compound collector in reverse flotation for magnesia removal in acid system. Solution surface tension measurement, Zeta potential test and infrared spectrum analysis were conducted to analyze the intensified effect of compound collector for dolomite removal. The results showed that under the conditions of grinding fineness -0.074 mm accounted for 89.8%, sulfuric acid dosage 12.0 kg/t, phosphoric acid dosage 3.0 kg/t, SDS compound proportion 3%, collector dosage 1.0 kg/t, the P2O5 grade of concentrate is increased from 25.7% to 29.94%. SDS can reduce the surface tension of slurry, which is conducive to the formation and stability of flotation foam. Zeta potential became negative due to the compound collector adsorbed on the mineral surface. Moreover, the -CH2 antisymmetric stretching vibration peak originated from fatty acid and SDS were detected after the interaction of collectors with dolomite. The compound collector was effectively adsorbed on the surface of dolomite, enhancing the magnesium removal effect of collophane.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 1; art. no. 159965
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The mechanism study on deep eutectic solvent for desilication of magnetite by reverse flotation
    Autorzy:
    He, Zhan
    Liu, Cai
    Mei, Guangjun
    Zhao, Yuanyuan
    Cheng, Qian
    Song, Xianwei
    Powiązania:
    https://bibliotekanauki.pl/articles/1845237.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    reverse flotation
    deep eutectic solvents collector
    desilication
    magnetie
    quartz
    Opis:
    Magnetite reverse flotation using a new deep eutectic solvent synthesized by lactic acid and CTAC as the collector has been investigated in this work. The flotation test results were compared with dodecylamine. The CTAC/lactic acid DES increased the grade of total iron to 66.69%, and the reduce quartz content to 6.67%, which were preferable to dodecylamine (the grade of Fe in the concentrate is 63.47%, and the grade of quartz in the concentrate is 9.13%). The depression performance and adsorption mechanism of CTAC/lactic acid DES on surface of magnetite and quartz are investigated by FT-IR, zeta potential and XPS. The results show that the adsorption of CTAC/lactic acid DES on quartz surface is more effective than that of magnetite. Therefore, deep eutectic solvent is an effective reagent for reverse flotation of magnetite as collector.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2021, 57, 6; 12-22
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The mechanism study on deep eutectic solvent for desilication of magnetite by reverse flotation
    Autorzy:
    He, Zhan
    Liu, Cai
    Mei, Guangjun
    Zhao, Yuanyuan
    Cheng, Qian
    Song, Xianwei
    Powiązania:
    https://bibliotekanauki.pl/articles/2146858.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    reverse flotation
    deep eutectic solvents collector
    desilication
    magnetie
    quarto
    Opis:
    Magnetite reverse flotation using a new deep eutectic solvent synthesized by lactic acid and CTAC as the collector has been investigated in this work. The flotation test results were compared with dodecylamine. The CTAC/lactic acid DES increased the grade of total iron to 66.69%, and the reduce quartz content to 6.67%, which were preferable to dodecylamine (the grade of Fe in the concentrate is 63.47%, and the grade of quartz in the concentrate is 9.13%). The depression performance and adsorption mechanism of CTAC/lactic acid DES on surface of magnetite and quartz are investigated by FT-IR, zeta potential and XPS. The results show that the adsorption of CTAC/lactic acid DES on quartz surface is more effective than that of magnetite. Therefore, deep eutectic solvent is an effective reagent for reverse flotation of magnetite as collector.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2021, 57, 6; 12--22
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implication and collecting mechanism of emulsified sodium vegetable oleate on fluorite flotation
    Autorzy:
    Sun, L.
    Liu, J.
    Liao, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/109761.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    emulsified sodium vegetable oleate
    collector
    fluorite flotation
    sodium oleate
    Opis:
    The emulsified sodium vegetable oleate (ESVO) was prepared with low-cost vegetable oleate. Using ESVO as a collector, the flotation performance of fluorite had been investigated comparing with sodium oleate at a temperature of 20 ± 2 °C. The results of flotation showed that ESVO had better collecting performance than the sodium oleate. The interaction mechanism of these two collectors with fluorite was studied by the zeta potential, FTIR spectra and laser grain-size tests. Both ESVO and sodium oleate changed fluorite zeta potential by electrostatic attraction and chemical adsorption, and generated calcium carboxylate on the fluorite surface. Moreover, it was concluded that higher fluorite recovery was a consequence of ESVO smaller surface tension comparing to sodium oleate.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 211-219
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of water recovery on the ion flotation process efficiency
    Autorzy:
    Hoseinian, Fatemeh Sadat
    Rezai, Bahram
    Kowsari, Elaheh
    Safari, Mehdi
    Powiązania:
    https://bibliotekanauki.pl/articles/1845227.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ion flotation
    collector structure
    process efficiency
    wastewater
    water recovery
    Opis:
    The present study deals with nickel ions removal from dilute aqueous solution by ion flotation with emphasizing the process efficiency. The effect of collector structure on ion flotation efficiency and water recovery was evaluated using anionic collectors of sodium dodecyl sulfate (SDS) and functionalized graphene oxide by 2,6-diaminopyridine (AFGO). The results showed that process efficiency enhanced with the increase in pH and reached to complete removal at pH of 9 and 9.7 for SDS and AFGO, respectively. The AFGO showed the multifunctional bindings for complex formations with nickel ions. A coordinate bond may be formed between nickel ions and AFGO at the pH of 9 which increased nickel ion removal. The water recovery as a critical parameter that contributes to removal efficiency was significantly affected by the collector structure. The AFGO doesn’t have a frothing property and so decreases the water recovery during the process. The AFGO had significantly lower water recovery than SDS (almost threefold).
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 5; 919-927
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flotacja rudy miedzi z użyciem n-dodekanu jako odczynnika zbierającego
    Flotation of copper ore with n-dodecane as a collector
    Autorzy:
    Bakalarz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/216551.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    kolektor apolarny
    flotacja
    minerały siarczkowe
    nonpolar collector
    flotation
    sulphide minerals
    Opis:
    Przedstawiono wyniki badań, których celem była wstępna analiza wpływu odczynnika apolarnego na przebieg procesu flotacji siarczkowej rudy miedzi pochodzącej z rejonu Legnicko-Głogowskiego Okręgu Miedziowego (LGOM). Wykonano dwie serie eksperymentów flotacyjnych: jedną w warunkach standardowych z użyciem etylowego ksantogenianu potasu (KEtX) jako odczynnika zbierającego oraz drugą serię flotacji z zastosowaniem wodnej emulsji n-dodekanu (C12), jako modelowego odczynnika apolarnego oraz ksantogenianu (KEtX). We wszystkich eksperymentach odczynnikiem pianotwórczym był roztwór \alfa-terpincolu. Stwierdzono, że w obecności odczynnika apolarnego część minerałów miedzi ulega flotacji, a pozostała ich część może być 'doflotowana' przy użyciu standardowego kolektora - ksantogenianu. Dokonano również porównania wyników flotacji rudy miedzi z użyciem n-dodekanu z serią flotacji z wcześniejszych badań autorki z zastosowaniem krótszego homologu - n-heptanu. Stwierdzono, że przy zastosowanym reżimie odczynnikowym, n-heptan wykazuje się wyższą selektywnością w porównaniu z n-dodekanem. W obecności różnych dawek n-heptanu, badany materiał lepiej wzbogacał się w nośniki węgla organicznego niż w minerały miedzi.
    Investigations of n-dodecane used in flotation of copper ore from the Legnica-Glogow Copper Basin (LGOM) were presented in the paper. The aim of the work was estimation of influence of nonpolar reagent's on the results of copper ore flotation. Two series of flotation tests were conducted. The first series - flotation experiments with standard flotation with xanthate collector only (KEtX), were compared with the second series: flotation experiments with n-dodecane addition (C12) in the first stage and then xanthate addition (KEtX). n-dodecane was used in form of aqueous emulsion and frother was aqueous solution of \alfa-terpincol. Flotation results showed that a part of copper minerals float with n-dodecane, and the rest of them is recovered using xanthate collector. The best results were obtained for the first series (with xanthate only). These flotation results were compared with the results of copper sulphide ores flotation with n-heptane addition. It was found that with the doses reagent used, n-heptane has a higher selectivity in comparison with n-dodecane. In the presence of various doses of n-heptane, tested material enriched better in organic carbon carriers than in the copper minerals.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2011, 27, 1; 69-83
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption Characteristics of Combined Sulfhydryl Collector on Chalcopyrite and Arsenopyrite in Flotation of Complex Gold Ores
    Charakterystyka adsorpcji kombinowanego kolektora sulfhydrylowego na chalkopirycie i arsenopirycie w flotacji złożonych rud złota
    Autorzy:
    Matveeva, Tamara
    Gromova, Nadezhda
    Powiązania:
    https://bibliotekanauki.pl/articles/318729.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    flotacja
    selektywny kolektor
    rudy złota
    flotation
    selective collector
    gold ores
    Opis:
    The paper presents the results of experimental study of the adsorption properties of the combined sulfhydril collecting reagent – a mixed solution of sodium diethyl-dithiocarbamate (DEDTC) and oxypropyl diethyl-dithiocarbamate ester (OPDTC) towards chalcopyrite and arsenopyrite with a view to its application as a selective collector of Au-containing sulfide minerals in flotation of complex refractory ores. Combined diethyl-dithiocarbamate solution (DEDTCc) incorporated a fixed content of anionic and non-ionic components (DEDTC:OPDTC = 1:1) and occurred variable hydrophobic effect on the surface of the basic gold-bearing sulfide minerals – chalcopyrite and arsenopyrite. The mechanism of adsorption of the components of combined collector on the surface of chalcopyrite and arsenopyrite was identified to form characteristic molecular shape of adsorbed collector convex neoplasms and sinter chemically adsorbed film of the reactant, which is firmly anchored on the surface. The newly formed phase of the adsorbed reagent did not dissolve in water at a subsequent washing. In this case, the phase of nonionic ester OPDTC was partially removed by water and the residual adsorbed droplets changed their shape and became flatter. By X-ray microanalysis C and O bands relating to the structure of the combined DEDTCc were identified on the surface of arsenopyrite and chalcopyrite. The original technic for analyzing the liner dimension of surface images with an application of scanning laser microscopy and the software of the Analyzer was developed and the authors succeeded to provide a quantitative evaluation of the adsorption of DEDTCc on the surface of chalcopyrite and arsenopyrite.
    W pracy przedstawiono wyniki badań eksperymentalnych właściwości adsorpcyjnych kombinowanego odczynnika zbierającego sulfhydryl – mieszanego roztworu dietyloditiokarbaminianu sodu (DEDTC) i estru oksypropylodietyloditiokarbaminianowego (OPDTC) w kierunku chalkopirytu i arsenopirytu w celu jego zastosowania selektywny kolektor minerałów siarczkowych zawie- rających Au w flotacji złożonych rud ogniotrwałych. Połączony roztwór dietylo-ditiokarbaminianu (DEDTCc) zawierał stałą zawartość składników anionowych i niejonowych (DEDTC: OPDTC = 1: 1) i zaobserwowano zmienny efekt hydrofobowy na powierzchni podstawowych minerałów siarczkowych niosących złoto - chalkopirytu i arsenopirytu. Mechanizm adsorpcji składników kombinowanego kolektora na powierzchni chalkopirytu i arsenopirytu został zidentyfikowany jako charakterystyczny skład molekularny adsorbowanego kolektora chemicznie zaadsorbowanych cząsteczek reagenta, który jest mocno zakotwiczony na powierzchni. Nowo utworzona faza zaadsorbowanego odczynnika nie rozpuszczała się w wodzie podczas kolejnego płukania. W tym przypadku faza niejonowego estru OPDTC została częściowo usunięta przez wodę, a resztkowe zaadsorbowane kropelki zmieniły swój kształt i stały się bardziej płaskie. Za pomocą mikroanalizy rentgenowskiej zidentyfikowano pasma C i O dotyczące struktury połączonego DEDTCc na powierzchni arsenopirytu i chalkopirytu. Opracowano oryginalną technikę analizy wymiaru liniowego obrazów powierzchni za pomocą skaningowej mikroskopii laserowej i oprogramowania analizatora, a autorom udało się określić ilościową ocenę adsorpcji DEDTCc na powierzchni chalkopirytu i arsenopirytu.
    Źródło:
    Inżynieria Mineralna; 2019, 21, 1; 153-157
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural modification of cellulose to enhance the flotation efficiency of fine copper oxide ore
    Autorzy:
    Gu, Guohua
    Zhu, Renfeng
    Chen, Zhixiang
    Powiązania:
    https://bibliotekanauki.pl/articles/109394.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fine malachite
    collector
    sulfuration flotation
    contact angle
    mean size
    flocculation
    Opis:
    Using more efficient collector to improve the recovery efficiency of fine copper oxide has become imperative as the shortage of copper mineral resources. In this study, the new collector 3-hydroxy butyrate-carboxy methyl cellulose xanthate (HCMCX) was synthesized by carboxy methyl cellulose, 3-hydroxy butyrate and carbon disulfide, all of which as raw materials . The structural characteristics of HCMCX was detected by both infrared spectrum and ultraviolet spectrum. Besides, the interacting behavior between HCMCX and fine malachite was investigated through particle size analysis, contact angle measurements, and flotation tests. Particle size analysis indicated that the mean size of malachite was increased by 8 μm while the HCMCX concentration at 200 mg/dm3. The contact angle measurements demonstrated that, comparing with the collector AX at a same dosage, the mineral surface of malachite showed a stronger hydrophobicity after interacting with HCMCX. Microflotation tests results exhibited that the recovery of malachite was about 94% when the pulp pH 8 and collector concentration at 200 mg/dm3. The results of practical ore flotation tests showed that HCMCX could as an excellent collector for flotation of fine malachite, finally to achieve the concentrates containing 20% Cu and 88% Cu recovery.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 1; 58-69
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhancing low-rank coal flotation using a mixture of dodecane and n-valeraldehyde as a collector
    Autorzy:
    Liu, Zechen
    Liao, Yinfei
    An, Maoyan
    Lai, Qingteng
    Ma, Longfei
    Qiu, Yuliang
    Powiązania:
    https://bibliotekanauki.pl/articles/109432.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mixed collector
    oxygen-containing functional groups
    adsorption mechanism
    low rank coal
    flotation
    Opis:
    Low-rank coals are difficult to float using common hydrocarbon oily collectors, such as dodecane and diesel. In this investigation, a mixture of dodecane and n-valeraldehyde was used as a collector to enhance low-rank coal flotation. The changes of the contact angle and surface functional groups of low-rank coal were measured before and after different collectors’ adsorption to indicate its absorption mechanism. Surface tension of different collectors was also measured to identify its spreading performance. The results showed that the flotation performance using the mixture as a collector was much better than that using dodecane or n-valeraldehyde solely. When used the mixture of dodecane and n-valeraldehyde as collector, dodecane primarily covers the hydrophobic sites while n-valeraldehyde primarily covered the hydrophilic sites by hydrogen bond promoting adsorption of dodecane at these sites. There existed synergistic effect between dodecane and n-valeraldehyde. Additionally, n-valeraldehyde can reduce the surface tensions to improve the spreading performance of mixed collector on low-rank coal surface. The improvement both in adsorption and spreading was responsible for the enhancement of low-rank coal flotation by using the mixture.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 1; 49-57
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective Flotation of Barite and Associated Minerals: A Comparative Study
    Flotacja barytu i minerałów towarzyszących: analiza porównawcza
    Autorzy:
    Kecir, M.
    Kecir, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/318431.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    baryt
    fluoryt
    flotacja
    odczynniki flotacyjne
    pH
    flotation
    barite
    fluorite
    calcite
    quartz
    collector
    Opis:
    In the present socio-economical difficult context and with the oil prices fall, Algeria aims to develop its economy. For this purpose, it has to research, work and valorize not only its hydrocarbons resources, but also mineral ones, among which barite and fluorite, two industrial minerals of great importance. Because Algeria is a producer of gas and oil and a member of the OPEC, it needs important quantities of barite. This mineral plays a leading role in the oil industry, where it’s a major ingredient of the drilling muds. As for fluorite, it is essentially used as flux in metallurgy, especially as the country has a huge iron deposit in Gara Djebilet, with a potential of 2,5 billions tons, that will support the steel platform of Algeria. Particularly interesting areas with reserves of almost 300 000 tonnes of fluorite have been highlighted in the Hoggar in Sahara. In order to answer the requirements of the mentioned uses, barite and fluorite ores have to undergo an appropriate processing. The method here applied is flotation, during which different reagents, both anionic and cationic, have been tested in order to choose those who give the best results. The aim of our study is, in a first step, a systematic flotation behaviour of barite and associated minerals, during which various collectors, combined with modifiers have been tested. Then, an artificial mixtures flotation was carried out and all the optimal conditions of flotation were applied to barite and fluorite-barite ores. Definitive choice of optimal flotation requirements focused on Petronate L (1000 g/t ; pH 6.5) for barite flotation and on Flotbel R171A (100 g/t; pH 9) for fluorite, combined with potassium dichromate as depressing agent for quartz and barite. The final flotation treatment has led to the obtention of a barite concentrate with a 93,4% BaSO4 grade and a fluorite concentrate with 93,6% CaF2,both answering the users’ requirements.
    W obecnej trudnej sytuacji socjoekonomicznej, w połączeniu ze spadkiem ceny ropy, Algieria jest nastawiona na rozwój ekonomiczny. W tym celu należy przeprowadzić badania, prace i waloryzację zasobów nie tylko surowców węglowodorowych, lecz również mineralnych, do których można zaliczyć baryt i fluoryt – dwa istotne minerały przemysłowe. Z racji tego, że Algieria prowadzi wydobycie gazu i ropy oraz jest członkiem OPEC, ma wysokie zapotrzebowanie na baryt. Minerał ten ma kluczowe znaczenie w przemyśle naftowym jako główny składnik iłowych płuczek wiertniczych. Fluoryt jest używany jako substancja zmiękczająca w metalurgii. Jest to istotne z powodu dużego złoża znajdującego się w tym kraju w GaraDjebilet, której zasoby sięgają 2,5 miliardy ton. Szczególnie interesujące tereny z zasobami fluorytu dochodzącymi do 300 000 ton mieszczą się w Hoggar na Saharze. W odpowiedzi na zapotrzebowanie przemysłu rudy barytu i fluorytu muszą być poddawane wzbogacaniu. Zastosowano flotację, podczas której badano odczynniki, zarówno anionowe jak i kationowe. Celem badań, w pierwszym etapie, było określenie wyników (efektów) flotacji barytu i minerałów towarzyszących, podczas której testowano różne kolektory wraz z ich modyfikatorami. Następnie przeprowadzono flotację sztucznych mieszanek oraz określono optymalne warunki flotacji rud barytu i fluorytu. Ostateczny wybór najlepszych parametrów technologicznych flotacji, został oparty na odczynniku zbierającym Petronate L (1000 g/t; pH=6,5) dla flotacji barytu oraz na Flotbel R171A (100 g/t; pH=9) dla fluorytu, w połączeniu z dichromianem potasu, jako czynnika depresyjnego dla kwarcu i barytu. Optymalny proces flotacji doprowadził do otrzymania koncentratu barytu z BaS04 na poziomie 93,4% i koncentratu fluorytu zawierającego 93,6% CaF2. Oba spełniają wymogi użytkowników.
    Źródło:
    Inżynieria Mineralna; 2015, R. 16, nr 2, 2; 117-124
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency of Barite Flotation Reagents - a Comparative Study
    Studium porównawcze odczynników do flotacji barytu
    Autorzy:
    Kecir, M.
    Kecir, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/318866.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    flotacja
    baryt
    minerały płonne
    zbieracze
    modyfikator
    odczyn pH
    flotation
    barite
    gangue minerals
    collector
    modifier
    pH
    Opis:
    Besides oil and gas, Algeria has important mineral resources which are a determining factor for the economic development of the country. Among these latter, barite is, for its specific properties, needed in big quantities in the oil industry as the major ingredient of drilling muds. Barite is also used as mineral filler, in barium chemistry (special glasses) and in the civil engineering and public works (heavy concretes). In order to answer the requirements of this use, barite ores have to be treated and the method here applied is flotation. Without this technique, there would be no mining industry as it is known it today. The present work concerns a long series of tests which allowed to specify the efficiency of various collectors (anionic and cationic) and modifiers (barium chloride, citric acid, potassium dichromate,…) during barite flotation. Besides the nature and consumption of the reagents, the influence of pH was also studied. After a comparative study of the various reagents used, the selected anionic collectors giving very good results were the sodium dodecylsulfate, petroleum sulfonate and sodium alkylsulfate Sulfopon T35. As for the cationic collector, Armac 18, a primary amine acetate, does not float barite and could be used in reverse flotation. The conclusions which were drawn in this work have been then verified on artificial binary and tertiary mixtures of pure minerals and on a barite ore. The best performance was reached with the use of Petronate L (1000 g/t; pH 6.5) for barite flotation, leading to the obtention of a barite concentrate with a 95.1% BaSO4 grade answering the oil industry requirements.
    Poza ropa naftową i gazem Algieria ma ważne dla rozwoju gospodarczego surowce mineralne. Spośród nich ważny jest baryt z uwagi na jego specyficzne właściwości, zapotrzebowanie w przemyśle naftowym jako główny składnik w płuczkach wiertniczych. Baryt jest również stosowany jako wypełniacz mineralny, w chemii (specjalne okulary) oraz w inżynierii lądowej i robotach publicznych (betony ciężkie). Aby sprostać wymaganiom jakościowym rudy barytu muszą być poddawane przeróbce, metodą stosowaną we wzbogacaniu jest flotacja. Niniejsza praca dotyczy długiej serię testów, które pozwoliły określić skuteczność różnych kolektorów (anionowych i kationowych) i modyfikatorów (chlorek baru, kwas cytrynowy, dwuchromian potasu) na proces flotacji barytu. Oprócz charakterystyki i zużycia odczynników badano również wpływ pH. Po przeprowadzeniu analizy porównawczej różnych odczynników stwierdzono że wybrane kolektory anionowe dają bardzo dobre ( dodecylosiarczan sodu, sulfonian naftowy i sód alkilosiarczan Sulfopon T35). Co do kolektora kationowego ARMAC 18, stwierdzono, że podstawowy składnik - octan aminy nie pływa na flotację barytu i może być stosowany we flotacji odwrotnej. Wnioski, które zostały przedstawione w pracy zostały zweryfikowane na sztucznych dwuskładnikowych mieszaninach czystych minerałów i rudy barytu. Najlepsze wyniki osiągnięto przy zastosowaniu Petronate L (1000 g / t; pH 6,5) dla barytu wzbogacanego flotacyjnego, co pozwala na otrzymanie koncentratu barytu o zawartości 95,1% BaSO4, odpowiadającego wymaganiom przemysłu naftowego.
    Źródło:
    Inżynieria Mineralna; 2016, R. 17, nr 2, 2; 269-278
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ parametrów procesowych na efektywność flotacji precypitacyjnej wodorotlenku glinu
    Influence of process parameters on the effectivity of aluminium hydroxide precipitate flotation
    Autorzy:
    Kawalec-Pietrenko, B.
    Rybarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2072660.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    wodorotlenek glinu
    flotacja
    stężenie kolektora
    pH
    prędkość powietrza
    aluminium hydroxide
    flotation
    collector concentration
    air flow rate
    Opis:
    Flotację precypitacyjną glinu prowadzono z użyciem dodecylosiarczanu sodu jako kolektora. Stwierdzono, że najwyższe wartości końcowego stopnia wyflotowania glinu oraz szybkości flotacji występują dla pH 6,5÷7,0, stosunku stężenia kolektora do stężenia glinu wynoszącego 1,2 oraz wynoszącej 1,5 mm s-1 prędkości przepływu powietrza obliczonej na przekrój pustej kolumny. Wzrost względnego stężenia kolektora ponad wymienioną wartość powoduje spadek szybkości flotacji oraz spadek współczynnika wzbogacenia.
    Aluminium hydroxide flotation was carried out using sodium dodecyl- sulphate as a collector. The highest values of aluminium final removal ratio and the highest flotation rate was observed for pH value in the range of 6.5÷7.0, collector concentration related to aluminium concentration equal to 1.2 and superficial air flow rate of 1.5 mm s-1. An increase of collector concentration above named value results in the decrease of flotation rate and lowering of enrichment coefficient.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2016, 1; 24--25
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flotacja jonów miedzi z rozcieńczonych kwaśnych roztworów wodnych
    Ion flotation of Cu2+ ions from diluted acidic aqueous solutions
    Autorzy:
    Kawalec-Pietrenko, B.
    Konopacka-Łyskawa, D.
    Rybarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2071112.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    flotacja jonowa
    miedź
    prędkość gazu
    kolektor anionowy
    stężenie
    ion flotation
    copper
    gas flow rate
    anionic collector
    concentration
    Opis:
    Usuwano jony miedzi z rozcieńczonych roztworów wodnych o pH = 4,5 w obecności kolektora anionowego SDS w procesie flotacji jonowej. Zbadano wpływ stężenia kolektora i prędkości przepływu powietrza na skuteczność usuwania jonów miedzi. Stwierdzono, że wzrost stężenia kolektora powoduje wzrost stopienia wyflotowania i spadek wartości współczynnika wzbogacenia. Wzrost prędkości przepływu powietrza wpływa na zmniejszenie współczynnika wzbogacenia i nie zmienia znacząco stopnia wyflotowania.
    Removal of Cu2+ ions from diluted aqueous solutions at pH = 4.5 using anionie collector (SDS) was investigated. An influence of collector concentration and linear gas velocity on the efficiency of copper ions removal was tested. It was found that an increase of collector concentration caused an increase of removal ratio and a decrease of enrichment coefficient. The increase of air velocity diminished the enrichment coefficient and did not affect considerably the removal ratio.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2010, 4; 34-35
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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