pyrite depression by reduction of solution
(PDF) Diethylenetriamine depression of Cu-activated
网页2014年3月1日 The significant depression of pyrite in the presence of DETA under the aerated condition was due to increased amount of iron
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Pyrite Depression by Reduction of Solution Oxidation
网页Pyrite Depression by Reduction of Solution Oxidation Potential. University of Utah. Department of Mineral Engineering, Jan D. Miller, United States. Environmental
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Pyrite depression by reduction of solution oxidation
网页Pyrite depression by reduction of solution oxidation potential [1970] Miller, Jan D.; Dept. of Mineral Engineering. [Corporate Author] United States [Corporate Author] Water
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Post-regrind selective depression of pyrite in pyritic
网页2015年3月1日 The pyritic copper–gold ore used in this study was obtained from a copper–gold mine in Asia. The pyrite rougher concentrate was obtained by two-stage
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Pyrite depression by reduction of solution oxidation
网页Pyrite depression by reduction of solution oxidation potential by University of Utah. Dept. of Mineral Engineering., 1971, Environmental Protection Agency, Water ...
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Rapid pyritization in the presence of a sulfur/sulfate
网页2020年5月19日 Sedimentary pyrite (FeS2) is commonly thought to be a product of microbial sulfate reduction and hence may preserve biosignatures. However, proof that
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Pyrite depression by reduction of solution oxidation
网页1970年1月1日 Pyrite depression by reduction of solution oxidation potential [University of Utah. Dept. of Mineral Engineering, .] on Amazon. *FREE* shipping on qualifying
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Pyrite Depression By Reduction Of Solution Oxidation
网页A study of pyrite depression by reducing agents with potassium ethylxanthate as collector indicates that pyrite may be depressed effectively in the flotation of both lead and copper
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Reductive dissolution of pyrite by methanogenic archaea
网页2021年6月10日 Here, we show that methanogens can catalyze the reductive dissolution of FeS 2 at low temperature (≤38 °C) and utilize dissolution products to meet cellular
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Diethylenetriamine depression of Cu-activated pyrite
网页2014年3月1日 The depression mechanism of DETA on pyrite involves the removal of activating ions (in this case, Pb 2+) and the formation of a hydrophilic Pb–DETA complex which adsorbs back onto the pyrite surface to compete with xanthate for adsorption sites.
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Advances in depressants used for pyrite flotation separation
网页2022年8月4日 Interestingly, lime and sodium hydroxide are also known as pH modifiers as they reduce the floatability of pyrite, mainly by changing the pulp pH. Ca 2+ plays an important role in the depression of pyrite; the depression mechanism of Ca 2+ will be further discussed in Sect. 4. Organic depressants
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A Brief Review of Auriferous Sulphide Flotation
网页reduction process by 59 mV (Bonnissel-Gissinger et al., 1998). As a result, low pulp potentials are recorded in alkaline solutions. Figure 3 Floatability of pyrite and arsenopyrite as a function of pH (Asp-Arsenopyrite; Py-pyrite). Adapted from ... These showed promising results in the depression of pyrite from a bulk concentrate made up of ...
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The role of sodium metabisulphite in depressing pyrite in
网页2019年10月1日 It is proposed that the depressing action of sulphite proceeds through the interaction of the adsorbed sulphite species with the hydrophobic copper and sulphur-like species such as Cu (I)S and S 0, the products formed through activation, on pyrite surface to form hydrophilic thiosulphate and copper sulphite precipitates, followed by subsequent
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磨矿和浮选过程中黄铁矿电化学行为的研究进展 - USTB
网页2020年6月29日 The mechanism of pyrite depression at acidic pH by lignosulfonate-based biopolymers with different molecular compositions. Miner Eng, 2016, 92: 37 doi: 10.1016/j.mineng.2016.02.007 [42] Mu Y F, Peng Y J, Lauten R A. Electrochemistry aspects of pyrite in the presence of potassium amyl xanthate and a lignosulfonate-based
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Rapid pyritization in the presence of a sulfur/sulfate-reducing ...
网页2020年5月19日 Sedimentary pyrite (FeS 2) is commonly thought to be a product of microbial sulfate reduction and hence may preserve biosignatures. However, proof that microorganisms are involved in pyrite...
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Pyrite Depression - Froth Flotation (Sulphide Oxide)
网页PYRITE DEPRESSION: I agree with you. But as per my experience pH play a major role in flotation. Different minerals behave differently at different pH. Lead is floated at low pH. 8 or 9. In cleaner cells pH >9. Cyanide consumption will be less if pH is controlled using instruments and PLC. Pyrite floats at very low pH or gets entrapped during ...
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(PDF) Electrokinetic study of pentlandite and quartz for froth ...
网页2023年4月19日 As part of an ongoing investigation to enhance pentlandite recovery from slimes, the flotation characteristics of pentlandite and quartz, were investigated using zeta potential measurements in the...
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(PDF) The Pyrite and Marcasite Electrodes - Academia
网页Pyrite and marcasite may be used as the indicating electrode in neutralization reactions. In acid solution the pyrite and marcasite electrodes behave almost identically with the platinum electrode with differences arising (1) in the presence of strong oxidizing agents where the attack on the pyrite and marcasite alters the potential, and (2) long standing
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Effect of Physisorption of Collecting Agent on Flotation of Pyrite
网页2022年9月19日 Abstract Flotation of pyrite is examined as function of pH and ferrous ion concentration. To explain depression of pyrite flotation in the neutral pH range and at high concentration of ferrous ions, the mechanism of physisorption of a collecting agent is used. It is experimentally determined that interaction products of xanthate and ferrous ions
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Oxidation Reduction Effects in Depression of Sulfide Minerals
网页2018年8月20日 Pyrite Evidently oxygen reduction occurs at a pyrite electrode which is either covered by a layer of oxide or hydroxide of iron or the electrode has a high over voltage because of the slow transformation of S° to SO4=. The oxidation reaction of pyrite may be written as FeS2 = Fe++ + 2 S° + 2 e
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of Pyrite in Seawater Flotation by Guar Gum
网页Pyrite flotation recovery was correlated with FBRM and PVM characterization to delineate the pyrite depression mechanisms by the guar gum. The high flotation recovery of pyrite with PAX was significantly lowered by guar gum, indicating that this polysaccharide could be used as an effective depressant in flotation with sea water.
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Minerals Free Full-Text Effects of Fine Minerals on Pulp
网页2020年1月9日 In this study, the effects of four fine minerals, which were fine diaspore (FDIA), kaolinite, illite, and pyrophyllite (D50 is about 4.55 μm, D80 is about 10.78 μm), on the pulp rheology of the diaspore and pyrite mixed ores (D50 is about 120.53 μm, D80 is about 187.36 μm) and the recovery of pyrite were investigated through flotation tests,
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Surface chemistry of activation of lime-depressed pyrite in flotation ...
网页2000年12月1日 The depression of pyrite by lime is attributed to the surface formation of Ca (OH)2, CaSO4 and Fe (OH)3 as determined by XPS analysis. Xanthate flotation tests show that oxalic acid and other...
MoreMinerals Free Full-Text Effects of Fine Minerals on Pulp
网页2020年1月9日 In this study, the effects of four fine minerals, which were fine diaspore (FDIA), kaolinite, illite, and pyrophyllite (D50 is about 4.55 μm, D80 is about 10.78 μm), on the pulp rheology of the diaspore and pyrite mixed ores (D50 is about 120.53 μm, D80 is about 187.36 μm) and the recovery of pyrite were investigated through flotation tests,
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Effect of Physisorption of Collecting Agent on Flotation of Pyrite
网页2022年9月19日 Possibility of activation of pyrite flotation by ferrous ions was proved. Injecting 10^ {-5} M ions of Fe 2+ into isopropyl xanthate solution with a concentration of 10^ {-5} M increased the extraction of pyrite into the concentrate in the neutral pH range from 23 to 50 %, and at pH 8—from 42 to 58 % [ 5 ].
MoreRapid pyritization in the presence of a sulfur/sulfate-reducing ...
网页2020年5月19日 Sedimentary pyrite (FeS 2) is commonly thought to be a product of microbial sulfate reduction and hence may preserve biosignatures. However, proof that microorganisms are involved in pyrite...
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(PDF) Electrokinetic study of pentlandite and quartz for froth ...
网页2023年4月19日 The reduction . of surface iron ... Castellón, C. et al., 2020. Depression of Pyrite in Seawater Flotation by Guar Gum. Metals, 10: 239. ... at the pyrite/aqueous solution interface ...
More磨矿和浮选过程中黄铁矿电化学行为的研究进展 - USTB
网页2020年6月29日 As the most common sulfide mineral, pyrite is found in coal and can contain a small amount of gold. The potential of electrochemical reactions for the beneficiation of pyrite makes it necessary...
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Pyrite Depression - Froth Flotation (Sulphide Oxide)
网页Cyanide is used in the lead circuit to depress both sphalerite and pyrite. From the lead tail we have to recover sphalerite depressing pyrite. Now we use copper sulphate to activate cyanide depressed sphalerite while doing so we must ensure that pyrite is not activated. Copper added to lead tails has to do two functions:
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Pyrite depression by reduction of solution oxidation potential.
网页Plot of sulfur species in solution produced during pyrite oxidation at pH 9 versus time 2. Plot of milliequivalents of NaOH added to maintain pH constant versus time for pyrite in all forms was estimated by reduction to I^S and determination of h^S by methylene-blue colorimetry (Johnson and Nishita, ). This technique gave.
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Influence of gold mineralogy on its flotation recovery in a
网页2013年8月9日 This approach improved gold grade significantly due to a drastic reduction in pyrite recovery. ... (III) from acidic solution by a novel N, S-containing metal–organic framework. 2022, Separation and Purification Technology ... The addition of DETA increased pyrite depression at the coarser grind size due to a significant reduction in Cu(I) ...
More(PDF) The Pyrite and Marcasite Electrodes - Academia
网页Pyrite and marcasite may be used as the indicating electrode in neutralization reactions. In acid solution the pyrite and marcasite electrodes behave almost identically with the platinum electrode with differences arising (1) in the presence of strong oxidizing agents where the attack on the pyrite and marcasite alters the potential, and (2) long standing
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黄铁矿表面黄药氧化还原反应的电极过程动力学_参考网
网页图1 不同旋转速率下黄铁矿表面黄药氧化的单向伏安曲线Fig.1 Unidirection CV curves of xanthate oxidation onto pyrite at different rotation rates (Scanning rate: 0.1 mV/s;KNO3: 0.1 mol/L; butyl xanthate: 2×10-4 mol/L; pH=7) 图1所示为黄铁矿与黄药在不同旋转速率下的单向伏安扫描曲线。
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THE INFLUENCE OF CYANIDE SALTS AND FERROUS
网页depression is a result of the inhibition of the cathodic oxygen reduction reaction on the pyrite surface and is not caused by enhanced anodic rates. Guo et al. (2014) concluded ... are used for pyrite depression (Rath et al., 2000; Khmeleva et al., 2002; ... consequently, in the basic solution at pH from 8 up to 12, pyrite recovery falls ...
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Depression of Pyrite in Seawater Flotation by Guar Gum - MDPI
网页Pyrite flotation recovery was correlated with FBRM and PVM characterization to delineate the pyrite depression mechanisms by the guar gum. The high flotation recovery of pyrite with PAX was significantly lowered by guar gum, indicating that this polysaccharide could be used as an effective depressant in flotation with sea water.
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IsoLab - Cr reduction - University of Washington
网页2020年9月28日 Chromium chloride solution for pyrite reduction: Weigh 266.45g of ClCl3∙6H2O (i.e. Cr3+) into a 1L glass beaker (using a weigh boat) Add 41.25ml of concentrated HCl (doesn’t need to be very accurate) Bring up to 1L with DI-H2O Stir with magnetic stir bar until all solids are dissolved. This may take an hour or more.
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(PDF) Pyrite depression by dextrin in flotation with xanthates ...
网页Pyrite depression with dextrin occurs around pH 8 so using dextrin could lower the pH in flotation processes operating at high pH such as the flotation of copper in porphyry ores and flotation of zinc in polymetallic base-metal sulfide ores.
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