THE ROLE OF SURFACE CHEMISTRY OF FINE SULFIDES IN THEIR FLOTATION P. Somasundaran, , ., , PhD Henry Krumb School of Mines Columbia University New York, New York 10021 .A.
Get PriceThe critical importance of pulp concentration on the flotation of galena from a low grade lead–zinc ore. Journal of Materials Research and Technology, Volume 5, Issue 2, 2016, pp. 131135. Download PDF View details. Electrochemical behavior of galena in the presence of calcium and sulfate ions.
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Get PriceThe xanthate flotation of sulfidized cerussite is strongly affected by residual aqueous sulfide (Fuerstenau et al., 1987; Sotillo and Fuerstenau, 1988). Flotation is inhibitted once the final concentration of sulfide in solution reaches about 5 ð 10 5 mol dm 3 .
Get PriceThe effect of the GR v inding media on xantate adsorption on galena in flotation system J. Min. Met. 40A (1) (2004) 27 On the other side, precipitate have positive charge in solutions of low acidic, neutral or low basic pH, and negative charge in solutions of basic …
Get PriceThe condition of these experiments and results of each one were used for obtaining parameters affecting of galena flotation most. Statistical values of Taguchi experiments models is shown in Table 7. This data were obtained using ANOVA analyze of conditions and results of experiments.
Get PriceThe optimal pH values ensuring a complete flotation of galena are agree with the potential of zero or minimum charge of its surface, and the optimal composition of the collector sorption layer consisting both of chemisorbed xanthenes and physically adsorbed dixanthenes.
Get PriceE ect of pH on Pulp Potential and Sulphide Mineral Flotation ... Lower Eh values were observed with galena by Rand and Woods (1984) as well. Although platinum and gold electrodes are both noble metal electrodes they showed 150200 mV di erence for the whole pH range. This was explained by a
Get PriceAFR had a crucial effect on flotation recovery of galena. The observed flotation recoveries increased to the maximum values obtained and then dropped sharply with further increase in AFR (10 lph). However, for the same experimental conditions much higher flotation recoveries with higher AFRs were obtained with the addition of MIBC.
Get PriceOXIDATION OF SULFIDE MINERALS. V. GALENA, SPHALERITE AND CHALCOGITE STEGBR eup DESJARDINS Mineral Sciences Laboratories, Canada Centre lor Mineral and Energy Technology, Department ol Energy, Mines and Resources, Ottawa, Ontaio KIA OGI AssrRecr Samples of galena, sphalerite and cbalcocite were
Get PriceSTUDIES OF ACTIVATION OF GALENA BY COPPER AND XANTHATE (PIPX) SYNTHESIZED COLLECTORS ADSORPTION Z. NEDJAR*, D. BARKAT Laboratory of Chemical Molecular and Environment, Sciences and Technology. Faculty, ... measure the critical pH values for galena flotation with amyl xanthate but not
Get PricePyrite is a major gangue mineral associated with galena and other valuable minerals, and it is necessary to selectively remove pyrite to upgrade the lead concentrate by froth flotation. In this study, the flotation experiments of a single mineral and mixed minerals were performed using chitosan with different molecular weights (MW = 2−3, 3minus;6, 10 and 100 kDa) as a depressant, ethyl ...
Get PriceAddition of cyanide enhances the flotation recovery of galena for Eh values between 200 mV to circa +300 mV, above which there is a decrease in recovery compared to the absence of cyanide. 720 J. RALSTON 0 A 40 CN= kg/t CN=O. 10 kg/t CN= kg/t i 0 I I I I I 600 400 200 0 200 400 Eh (mV) 600 Recovery of galena as a function of ...
Get PriceValues of the flota The Australasian Institute of Mining and Metallurgy, Melbourne. tion rate constant for the galena are always greater than for Cusack, , Stump, , 1977. Australian lead/zinc mineral processing the marmatite as would be expected. The high zinc recov developments.
Get PriceFlotation separation of chalcopyrite from galena by sodium humate and ammonium persulfate Ruizeng LIU 1, Wenqing QIN 1, Fen JIAO , Xingjie WANG , Bin PEI2, Yongjun YANG2, Chunhua LAI3 1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; 2.
Get PriceFlotation of Galena (PbS) Complete flotation of galena is achieved from pH 2 to pH 10 using ethyl xanthate The collector adsorption mechanisms were discussed above. The hydrophobic metalcollector species responsible for flotation is PbX 2. Depending on the hydrocarbon chain length of the collector, the amount of collector required
Get PriceThe problem of treating oxidized leadzinc ores for the production of highgrade lead zinc flotation concentrates is a complex problem due to the nature of the ores and to the soft sliming characteristics of the lead and zinc minerals. The ore for treatment is a leadzinc carbonate ore in a mixed siliceouslime carbonate gangue. The association of the minerals and gangue requires a 65 mesh ...
Get PriceIf the galena surfaces are slightly oxidized (“tarnished”), including mercaptobenzothiazole (MBT) is often made part of the collector suite to maximize galena recoveries. Frothers used in galena flotation tend to be of the weaker type, such as MIBC, because galena is readily floatable and have high flotation …
Get PriceDifference of Galena and Pyrite in HighAlkaline Lime Systems ... solution environment, at high pH values above 12, there is a lack of clarity and clear link on the flotation separation of galena ... Table 1. Summary of the Galena Flotation Behavior in Various Conditions
Get PriceThe effect of grinding media type after 60 min grinding on the flotation recovery of galena was investigated. Table 1 Fig. (2). Production of H 2O 2 in pulp liquid as a function of grinding time during wet grinding. Table 1. Effect of pH on the flotation recovery of galena with air atmosphere during the flotation. pH Stainless Steel Mild Steel ...
Get PriceChapter 7. Depression of sphalerite with cyanide and zinc sulphate 104 Deactivation with zinc sulphate At Rosh Pinah Mine, the selective flotation of the leadzinc sulphide composite is carried out at mildly alkaline pH values. However, depending on the flotation conditions, sphalerite can be activated by products from the dissolution and/or
Get PriceI see that there is no need to reiterate the mineralogical, metallurgical or surface chemistry underpinning differential flotation of galena and sphalerite, but you may be interested to know that the traditional galena float with sphalerite depression followed by sphalerite activation and flotation is not the only approach in use.
Get PriceJan 15, 2019· When PBX concentration reaches × 10 −4 mol/L, the recoveries for both galena and pyrite reach their maximum values. The results in Fig. 2 also show that the particle size has little effect on galena flotation. Different from galena, the decrease of particle size reduces the flotation …
Get PriceStudies on preconcentration of molybdenum values from a primary molybdenum ore deposit located in Harur of Dharmapuri district, Tamilnadu were carried out by physical beneficiation techniques. Inspite of being a primary deposit, the Mo content in the ore is very low, being % only. Mo is present as molybdenite (MoS 2 ) and the other sulfide minerals in the ore are pyrite, galena and traces ...
Get Price1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air …
Get PriceIn this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) from sphalerite (ZnS) and pyrite (FeS2) using sodium isopropyl xanthate as a collector and 4methyl2pentanol (MIBC) as a frother. Flotation tests were carried out in a D12Denver flotation laboratory cell in the presence and absence of ...
Get PriceEffect of different depressants on galena flotation. ... and meta bisulphite were used as a depressant for pure pyrite sample and a pyritic copper ore at two different pHs values. pH was and ...
Get PriceRheological investigations of ultrafine galena particle slurries under flotationrelated conditions Prestidge, Clive A. 19971001 00:00:00 The theological behaviour (viscosities and extrapolated yield values) of ultrafine galena particle slurries under flotationrelated conditions has been studied using a concentric cylinder rheometer. The ...
Get PriceForms of Lead and Zinc Ore The two principal minerals containing lead and zinc are galena and sphalerite. These two minerals are frequently found together along with other sulfide minerals, but one or the other may be predominant. Galena may contain small amounts of impurities including the precious metal silver, usually in the form of a sulfide.
Get PriceEffects of colloidal montmorillonite particles on the froth flotation of graphite, galena and fluorite 703 Fig. 3. Particle size distribution of colloidal MMT samples Flotation The composition of the flotation slurry was a mixture of pure minerals and colloidal MMT at a variety of proportion, ranging from 0% to 40% pure minerals (60% to 0% MMT).
Get PriceTable I. Ideal Values According to Stokes fLaW. ... shown, for example, that in the tailing from a galena flotation process the lead content generally increases with decreasing size of the slime partioles and that the product "minus 200 mesh" or "minus 325 mesh" assays high ...
Get PriceConsidering the species distribution diagrams given in Figure 3a,b, and the zeta potential values of galena given in Figure 1, the high flotation recoveries of galena at 2– pH (Figure 2a) were mostly caused by Coulombic forces: the interaction between oppositely charged xanthate species (X –) and mineral surfaces (Pb 2+).
Get PriceFlotation experiment research on a polymetallic sulfide ore of Cu, Pb, and Zn in Shanxi province Dai Shujuan* and Hu Zhigang *Liaoning University of Science and Technology, Liaoning Anshan, China Liaoning Academy of Geology and Mineral Resources, Shenyang, China
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