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  • Oxidation of Sulfide Minerals in Benefication Processes ...

    Dec 01, 1997  Oxidation of Sulfide Minerals in Benefication Processes [Avdohin, V.M.] on Amazon. *FREE* shipping on qualifying offers. Oxidation of Sulfide Minerals in Benefication Processes

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  • Oxidation of Sulfide Minerals in Benefication Processes ...

    Results of recent experimental studies and modern theoretical concepts are combined in this volume to provide a comprehensive analysis of sulfide mineral oxidation processes. Introductory chapters discuss the properties of sulfide minerals and various investigative techniques, followed by chapters on oxidation mechanisms and the behavior of minerals under these various oxidizing conditions ...

  • Oxidation of sulfide minerals in benefication processes ...

    1. Properties of Sulfide Minerals Methods of Investigation of Sulfide Mineral Oxidation Processes 2. Electrode Kinetics and Oxidation Mechanism 3. Mutual Influence of Sulfide Minerals on Their Oxidation 4. Estimates of the Thermodynamic Stability of Sulfide Minerals

  • Oxidation of Sulfide Minerals in Benefication Processes

    Avdohin, Oxidation of Sulfide Minerals in Benefication Processes, 1998, Buch, 9789056995706. Bücher schnell und portofrei

  • Peter Books: Download Oxidation of Sulfide Minerals in ...

    Oxidation of Sulfide Minerals in Benefication Processes PDF Download. Download free ebook of Oxidation of Sulfide Minerals in Benefication Processes in PDF format or read online by A Abramov,V. M. Avdohin 9789056995706 Published on 1998-01-23 by CRC Press. Results of recent experimental studies and modern theoretical concepts are combined in this volume to provide a comprehensive

  • How to Process Copper Ore: Beneficiation Methods and ...

    May 30, 2020  The oxidation of copper mineral dissolves to generate copper sulphate that will be replaced with iron filings to restore copper ions to metallic copper for precipitation. Finally, float the metallic copper and copper sulfide minerals insoluble in sulfuric acid to obtain copper concentrate. Ammonia leaching

  • Beneficiation - Wikipedia

    For sulfide ores, a different process is taken for beneficiation. The ore needs to have the sulfur removed before smelting can begin. Roasting is the primary method of separating, where wood was placed on heaps of ore and set on fire to help with oxidation. 2 Cu 2 S + 3 O 2 → 2 Cu 2 O + 2 SO 2

  • How to Process Copper Ore: Beneficiation Methods and ...

    May 30, 2020  The oxidation of copper mineral dissolves to generate copper sulphate that will be replaced with iron filings to restore copper ions to metallic copper for precipitation. Finally, float the metallic copper and copper sulfide minerals insoluble in sulfuric acid to obtain copper concentrate. Ammonia leaching

  • 12 5 flotation practice in beneficiation of sulfide copper

    Sulfide Ores Flotation. In ore beneficiation, flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer. Sulfide and non-sulfide minerals as well as native metals are recovered by froth flotation. Chat Online. Get Price []

  • Beneficiation - Wikipedia

    For sulfide ores, a different process is taken for beneficiation. The ore needs to have the sulfur removed before smelting can begin. Roasting is the primary method of separating, where wood was placed on heaps of ore and set on fire to help with oxidation. 2 Cu 2 S + 3 O 2 → 2 Cu 2 O + 2 SO 2

  • Oxidation Reduction Effects in Depression of Sulfide Minerals

    The reversible group of sulfide minerals include galena and chalcocite. The potentials for oxidation/reduction reactions for reversible sulfides can be predicted if metastabillty of elemental sulfur is considered. In the passivated group of sulfide minerals, which may include pyrite, chalcopyrite and bornite, the reactions are irreversible.

  • Ore Beneficiation - an overview ScienceDirect Topics

    Many such organisms find use in beneficiation processes because they are capable of bringing about surface chemical changes on minerals. Microbial cells and metabolic products such as polysaccharides, proteins, organic and inorganic acids can be used as reagents in mineral flotation and flocculation.

  • Oxidation of sulfide minerals in benefication processes

    1. Properties of Sulfide Minerals Methods of Investigation of Sulfide Mineral Oxidation Processes 2. Electrode Kinetics and Oxidation Mechanism 3. Mutual Influence of Sulfide Minerals on Their Oxidation 4. Estimates of the Thermodynamic Stability of Sulfide Minerals

  • REACTION MECHANISM AND KINETICS OF SULFIDE COPPER ...

    sulfide minerals is carried out in order to reduce the sulfur content to the amount desirable for the smelting process and further, obtaining richer copper matte. The complexity of the reactions that occur during the oxidation of sulfide copper minerals is based on the fact that some of the phase transformations are simultaneous and their

  • On the characteristic properties of oxidation of sulfide ...

    Abstract. High-power nanosecond electromagnetic pulses cause changes in the chemical and phase surface composition of sulfide minerals (pyrrhotite and pentlandite) and their sorption, flotation, and chemical activities.

  • Bioflotation of sulfide minerals with Acidithiobacillus ...

    Sep 09, 2012  Surface oxidation of sulfides and copper (Cu) activation are 2 of the main processes that determine the efficiency of flotation. The present study was developed with the intention to ascertain the role of the phenomena in the biomodification of sulfides by Acidithiobacillus ferrooxidans culture (cells and growth media) and their impact in bioflotation.

  • Oxidation of Sulfide Minerals: From Acid Mine Drainage to ...

    The oxidation of sulfide-rich waste exposed to air and water generate highly acidic toxic solutions (Fig. 1) that are referred to as acid mine drainage (AMD). Mechanisms of abiotic pyrite oxidation Oxidation of FeS, is an electrochemical process that involves concurrent stepwise cathodic and anodic reactions.

  • Application of biotechnology in iron ore beneficiation ...

    Jan 01, 2015  Unlike mineral sulfide ores, iron ore does not provide an energy source (e.g., ferrous and sulfur compounds) for the oxidative growth of bioleaching microorganisms; however, iron-reducing bacteria, which gain energy by the dissimilatory reduction of ferric iron to ferrous iron, may be useful in upgrading iron ore slimes.

  • Kinetics of oxidation of aqueous sulfide by oxygen ...

    Influence of water column dynamics on sulfide oxidation and other major biogeochemical processes in the chemocline of Mariager Fjord (Denmark). Marine Chemistry 2001 , 74 (1) , 29-51.

  • (PDF) Acid leaching and dissolution of major sulphide ore ...

    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 ...

  • (PDF) Effect of mineral processing wastewater on flotation ...

    The effects of mineral processing wastewater on sulfide minerals were investigated by flotation, infrared spectrometry and electrochemistry test.

  • 12 5 flotation practice in beneficiation of sulfide copper

    Sulfide Ores Flotation. In ore beneficiation, flotation is a process in which valuable minerals are separated from worthless material or other valuable minerals by inducing them to gather in and on the surface of a froth layer. Sulfide and non-sulfide minerals as well as native metals are recovered by froth flotation. Chat Online. Get Price []

  • On the characteristic properties of oxidation of sulfide ...

    Abstract. High-power nanosecond electromagnetic pulses cause changes in the chemical and phase surface composition of sulfide minerals (pyrrhotite and pentlandite) and their sorption, flotation, and chemical activities.

  • Application of biotechnology in iron ore beneficiation ...

    Jan 01, 2015  Unlike mineral sulfide ores, iron ore does not provide an energy source (e.g., ferrous and sulfur compounds) for the oxidative growth of bioleaching microorganisms; however, iron-reducing bacteria, which gain energy by the dissimilatory reduction of ferric iron to ferrous iron, may be useful in upgrading iron ore slimes.

  • Oxidation of Sulfide Minerals in Benefication Processes ...

    Pris: 2526 kr. inbunden, 1998. Skickas inom 2-5 vardagar. Köp boken Oxidation of Sulfide Minerals in Benefication Processes av A. A. Abramov (ISBN 9789056995706) hos Adlibris. Fri frakt. Alltid bra priser och snabb leverans. Adlibris

  • (PDF) Effect of mineral processing wastewater on flotation ...

    The effects of mineral processing wastewater on sulfide minerals were investigated by flotation, infrared spectrometry and electrochemistry test.

  • REACTION MECHANISM AND KINETICS OF SULFIDE COPPER ...

    sulfide minerals is carried out in order to reduce the sulfur content to the amount desirable for the smelting process and further, obtaining richer copper matte. The complexity of the reactions that occur during the oxidation of sulfide copper minerals is based on the fact that some of the phase transformations are simultaneous and their

  • Bioflotation of sulfide minerals with Acidithiobacillus ...

    Sep 09, 2012  Surface oxidation of sulfides and copper (Cu) activation are 2 of the main processes that determine the efficiency of flotation. The present study was developed with the intention to ascertain the role of the phenomena in the biomodification of sulfides by Acidithiobacillus ferrooxidans culture (cells and growth media) and their impact in bioflotation.

  • Kinetics of oxidation of aqueous sulfide by oxygen ...

    Influence of water column dynamics on sulfide oxidation and other major biogeochemical processes in the chemocline of Mariager Fjord (Denmark). Marine Chemistry 2001 , 74 (1) , 29-51.

  • Oxidation of Sulfide Minerals: From Acid Mine Drainage to ...

    The oxidation of sulfide-rich waste exposed to air and water generate highly acidic toxic solutions (Fig. 1) that are referred to as acid mine drainage (AMD). Mechanisms of abiotic pyrite oxidation Oxidation of FeS, is an electrochemical process that involves concurrent stepwise cathodic and anodic reactions.

  • Technical Document: Acid Mine Drainage Prediction

    1.1 Oxidation of Metal Sulfides Acid is generated at mine sites when metal sulfide minerals are oxidized. Metal sulfide minerals are present in the host rock associated with most types of metal mining activity. Prior to mining, oxidation of these minerals and the formation of sulfuric acid is a function of natural weathering processes.

  • Oxidation of Copper Sulfides and Secondary Sulfide ...

    Examples of sulfide enrichment above the water table as well as at and below the water table are well known, and using the water table as a plane separating oxidation and sulfide enrichment is debatable. It may be better to separate the zones on bases of stability of metal sulfides, controlled by oxidation-reduction potentials and pH.

  • Microbial sulfide removal Water Tech Online

    The biological oxidation of sulfides and sulfur-containing compounds is a widely practiced industrial process. The use of sulfur oxidizing bacteria to treat hydrogen sulfide present in air exhaust or vent air streams is a commercial process practiced by a number of companies. 2 It might seem obvious that a simple solution would be to strip all the sulfide out of the aqueous phase into the ...

  • Thermodynamics and Kinetics of Sulfide Oxidation by Oxygen ...

    Apr 09, 2011  Introduction. The oxidation of hydrogen sulfide is arguably one of the most important processes in the environment as the oceans have been suboxic or anoxic and euxinic (i.e., sulfidic) for long spans of geologic time (Canfield and Raiswell, 1999; Turchyn and Schrag, 2006).These are the oceans in which eukaryotes evolved and sulfur metabolism may have helped shape initial symbiotic

  • Sulfide mineral oxidation and subsequent reactive ...

    A versatile numerical model that couples oxygen diffusion and sulfide‐mineral oxidation (PYROX) has been developed to simulate the oxidation of pyrite in the vadose zone of mine tailings. A shrinking‐core oxidation model and a finite element numerical scheme are used to simulate the transport of oxygen and oxidation of pyrite grains.

  • Oxidation of Sulfide Minerals in Benefication Processes ...

    Pris: 2526 kr. inbunden, 1998. Skickas inom 2-5 vardagar. Köp boken Oxidation of Sulfide Minerals in Benefication Processes av A. A. Abramov (ISBN 9789056995706) hos Adlibris. Fri frakt. Alltid bra priser och snabb leverans. Adlibris

  • PROCESS FOR THE BENEFICIATION OF SULFIDE MINERALS

    processes in which is desirable to selectively collect copper sulfide minerals and selectively reject iron sulfide minerals such as pyrite and pynthotite, as well as other gangue sulfides, the collector is preferably used in amount of from about 0.01 Ib./ton to about 5 lbs/ton of ore in the slurry.In bulk sulfide froth flotation processes ...

  • Oxidation of Copper Sulfides and Secondary Sulfide ...

    Examples of sulfide enrichment above the water table as well as at and below the water table are well known, and using the water table as a plane separating oxidation and sulfide enrichment is debatable. It may be better to separate the zones on bases of stability of metal sulfides, controlled by oxidation-reduction potentials and pH.

  • Non-Ferrous Metal Sulfide Ore Processing - JXSC Machine

    Currently, the technology that based on the oxidation-reduction reaction of sulfide ore, be widely adopted in the mineral processing plants. Take a copper-zinc ore mine as the example, they attach high importance to the hydrophobicity of mineral ore, develop the chemical reaction process and established a complete production model that has ...

  • ni cu fe sulfide ore beneficiation

    oxidation of sulfide minerals benefiion processes Recovery of Cu and Zn from Complex Sulphide Ore biotechnology in iron ore beneficiation . Unlike mineral sulfide ni cu fe sulfide ore beneficiation;

  • Gold Sulphide Ore Oxidation by Alkaline Pressure

    Table of ContentsExperimental ProceduresResults and DiscussionProposed Process Flowsheet The U.S. Bureau of Mines developed an alkaline oxidative pretreatment to increase the recovery of gold from refractory sulfide ores containing arsenopyrite (FeAsS) and/or pyrite (FeS2). Pretreatment of a low grade ore containing 0.4% FeAsS, 3.5% FeS2, and 2.74g/mt Au with 1.2M NaOH, 40 psig 02, 100° C ...

  • US9187340B2 - Sulfide oxidation process for production of ...

    A looping method for production of MoO 2 , the method including reacting molybdenite feed with a substantially stoichiometric mixture comprising MoO 3 and oxygen in a first furnace to produce MoO 2 and SO 2 , removing a first portion of the MoO 2 from the first furnace, transferring a second portion of the MoO 2 from the first furnace to a second furnace, reoxidizing of the transferred portion ...

  • Thermodynamics and Kinetics of Sulfide Oxidation by Oxygen ...

    Apr 09, 2011  Introduction. The oxidation of hydrogen sulfide is arguably one of the most important processes in the environment as the oceans have been suboxic or anoxic and euxinic (i.e., sulfidic) for long spans of geologic time (Canfield and Raiswell, 1999; Turchyn and Schrag, 2006).These are the oceans in which eukaryotes evolved and sulfur metabolism may have helped shape initial symbiotic

  • Effect exerted by structural features of copper-zinc ores ...

    Modeling the oxidation of pyrite copper-zinc ores under evaporization shows that structural features of ores influence the process kinetics, and displays new-formed mineral phases, namely, gannigite, biankite, chalcanthite, which relate with sulfate generating on evaporation from natural and process waters at pyrite deposits. The oxidation effect on the mineral flotation properties is described.

  • Technical Document: Acid Mine Drainage Prediction

    1.1 Oxidation of Metal Sulfides Acid is generated at mine sites when metal sulfide minerals are oxidized. Metal sulfide minerals are present in the host rock associated with most types of metal mining activity. Prior to mining, oxidation of these minerals and the formation of sulfuric acid is a function of natural weathering processes.

  • OXIDATION OF SULFIDE MINERALS. V. GALENA,

    sulfide minerals. The oxidation of pyrite, chal-copyrite and pyrrhotite at 52oC and, 687o of. relative humidity (RH) has already been in-vestigated (Steger Desjardins 1978). This re-potr summarizes the results of the study 9f tle bxidation of galena, sphalerite and chalcocite under the same conditions. ...

  • Sulfide mineral oxidation and subsequent reactive ...

    A versatile numerical model that couples oxygen diffusion and sulfide‐mineral oxidation (PYROX) has been developed to simulate the oxidation of pyrite in the vadose zone of mine tailings. A shrinking‐core oxidation model and a finite element numerical scheme are used to simulate the transport of oxygen and oxidation of pyrite grains.

  • Bacteria-Sulfide Mineral Interactions with reference to ...

    beneficiation processes involving the separation of value minerals from ores and materials ... Energy is obtained from oxidation of sulphur compounds (sulphides, sulphur, thiosulfate). All species fix CO ... sulfide minerals and sulfur, prevalent for acid mine drainage, mineral leach dumps and heaps. ...

  • Study on the Degradation of Sodium Diethyldithiocarbamate ...

    The degradation of DDTC in beneficiation wastewater has become an increasingly concerned issue due to the serious effects on the environment. In this study, the degradation characteristics of DDTC in artificially prepared beneficiation wastewater were investigated by adding sodium hypochlorite as an oxidant, and the influences of different degradation conditions on removal efficiency of DDTC ...