Pyrite Flotation With Xanthate Under Alkaline Conditions — Application to Environmental Desulfurisation ... Finally, if the redox potential is


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Depression of Pyrite by Metabisulfite and Sulfite Ions in Seawater And - Download as PDF File (.pdf), Text File (.txt) or read online. The effect of sulfite and metabisulfite ions on the amyl xanthate flotation of copper-activated pyrite, in distilled water and seawater, has been studied by micro-flotation tests and redox potential measurements.


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IRON SULFIDE OXIDATION AND THE CHEMISTRY OF ACID GENERATION P.J. Sullivan, K.J. Reddy and J.L. Yelton Journal Article 1988 WWRC - 8 8 13 In Environmental Geological Water Science


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Preferential adsorption of cyanide on pyrite rather than the decrease of surface redox potential was determined to be the depression contributor. Surface cyanoferric species were identified, both electrochemically and spectroscopically, on pyrite surface in the presence of cyanide, inhibiting the oxidation of pyrite and the oxidation ...


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Redox potential A. Arbitrary scale – how oxidized or reduced things are compared to a standard ... -Often due to precipitation of pyrite: (see above)


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of pyrite depression with OVA was found to be ... emphasized importance of redox potential on OVA-pyrite ... Impact of ovalbumin on pyrite flotation in the ...


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Effect of redox conditions and copper ions on pyrite depression by sodium metabisulfite and sodium sulfite in seawater


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dehydration and oxidation of pyrite mud and potential acid mine drainage using hyperspectral dais 7915 data (aznalcÓllar, spain) Riaza a,*, C. Ong b, A. Müller c


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The floatability of sulfide minerals can be affected by the redox conditions on particle surface and in the pulp and can be used as one of the parameters for the separation of sulfide minerals. In the present study, the presence of reducing and oxidizing agents in the pulp is investigated for pure samples of chalcopyrite and pyrite. A good correlation between pulp potential …


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Corrosion andElectrochemical Oxidation ofa Pyrite ... Moreover, the measurement of pyrite redox potential in those experiments was performed with a pyrite slab elec-


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Get this from a library! Pyrite depression by reduction of solution oxidation potential.. [Jan D Miller; University of Utah. Department of Mineral Engineering.;


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Flotation and depression control of arsenopyrite through pH and pulp redox potential using xanthate as the ... When the ore contains gold-poor pyrite and ...


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Pyrite, the most abundant metal sulfide at the surface of Earth, plays a key role in many processes such as acid mine drainage, redox cycling of metals at oxic-anoxic boundaries of lake bottom, and degradation of pollutants. The oxidation of pyrite was studied in batch experiments over a large range of pH (2.5−12), with trace oxygen. …


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This paper introduces a new potential method of pyrite depression in the flotation of high sulfur coal based on the electrochemical pyrite surface control. Experimental date show that the natural hydrophobicity of pyrite depends on the oxidation-reduction potential of the pulp. The mechanism and ...


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Redox (short for reduction–oxidation reaction) (pronunciation: / ˈ r ɛ d ɒ k s / redoks or / ˈ r iː d ɒ k s / reedoks) is a chemical reaction in which the oxidation …


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Control of redox potential by oxygen limitation in selective bioleaching of chalcocite and pyrite Biao Wu*, Jian-Kang Wen, Bo …


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oxidation–reduction or redox potential1. To ... depression of sulphide minerals, ... that the potential of both pyrite and pyrrhotite increases with time;


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pyrite may control the redox potential E h in the repository (Puigdomenech et al. 2001). Third, pyrite may be a source of sulphide ions HS ...


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Pulp potential was also stable between pH 5 to 9 at about 60 mV where maximum recovery was obtained in this pH range.5 maximum recovery was obtained) for pyrite flotation as the present study and stated that the decrease in recovery above pH 9 was due to the formation of Fe(OH)2 on pyrite..1987). 1979. Recovery and pulp potential of pyrite …


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hydrocarbons to produce pyrite, oxygenated organic compounds, ... Oxidation and reduction can be viewed in terms of an exchange in electrons. Due to the migration of electrons between oxidants, or electron acceptors, and reductants, which lose electrons, a potential difference is set up within the redox system that can be measured using an inert platinum electrode. The range of redox ...


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Effect of H 2 O 2 and NaSH Addition to Change the Electrochemical Potential in Flotation of Chalcopyrite and Pyrite Minerals


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Depression of pyrite is very important in sulphide ore flotation. This paper investigates the role of non-toxic depressants on the flotation of pyrite ...


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Request PDF on ResearchGate | Flotation and depression control of arsenopyrite through pH and pulp redox potential using xanthate as the collector | The role of pH and pulp redox potential (EH) to control the flotation and depression of arsenopyrite has been investigated through studies on microflotation of arsenopyrite crystals and batch ...


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The surface acidity and the redox potential of iron- bearing minerals are critical parameters for under- standing redox chemistry of soils or sediment systems


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DEHYDRATION AND OXIDATION OF PYRITE MUD AND POTENTIAL ... spectral differences related to dehydration, oxidation and ... to hematite when dehydration and oxidation is


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E ect of pH on Pulp Potential and Sulphide Mineral Flotation ... gold, chalcopyrite, pyrite and galena. In solution, ... In order to monitor redox properties, ...


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this study the e ect of pH on potential in solution and sulphur minerals flotation is discussed with various electrodes. The electrodes were platinum, gold, chalcopyrite, pyrite and galena. In solution, potentials were


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Redox potential was shown to be the key factor affecting the dissolution difference between chalcocite and pyrite. (2) Chalcocite and pyrite leaching efficiency were 95% and 11% respectively and there is great dissolution difference between them at redox potential 700 mV (SHE). (3) It is indicated that copper can be selectively bioleached ...


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