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refractory gold ores

  • rebellious ores sulfides selenides and tellurides

    Rebellious ores sulfides, selenides and tellurides. the early day miners feared it, and it happened a lot more often than they would have liked the easily worked rich surface ores they discovered on the surface gave way as they mined downward, to a vein full of sulfides, base metals and other nasty, rebellious and refractory ores.

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  • refractory gold ores challenges and opportunities for a

    Refractory gold ores challenges and opportunities for a key source of growth. the reserve crisis of gold miners is a regularly discussed topic. the article from mckinsey summarizes an important aspect for the industry exploiting ore that is more challenging to process. gold production from refractory ore is growing much faster than gold.

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  • pdf biooxidation of sulfidic refractory gold ores

    Biooxidation of sulfidic refractory gold ores rupert kirchner, bsc paper conducted in november 2015 abstract the past years have confirmed that biooxidation is a viable technology which is used commercially to treat certain refractory sulfide gold concentrates. there are several processes applied to achieve the oxidation of the sulfidic.

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  • a twostage bacterial pretreatment process for double

    A twostage bacterial pretreatment process for double refractory gold ores r.k. amankwah a,, w.t. yen a, j.a. ramsay b a mining engineering department, queens university, kingston, ontario, canada k7l 3n6 b chemical engineering department, queens university, kingston, ontario, canada k7l 3n6 received 7 april 2004 accepted 11 may 2004 abstract double.

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  • economic evaluation of biooxidation of gold ores

    This paper will review the laboratory scale testwork for various biooxidation process of sulfidic refractory gold ores and concentrates and provide the economic evaluation showing the biooxidation could be the most economic method without much sacrificing the overall gold recovery. original language.

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  • pdf refractory goldbearing ores a review of treatment

    Hydrometallurgy, 34 1994 383395 383 elsevier science b.v., a m s t e r d a m refractory goldbearing ores a review of treatment methods and recent advances in biotechnological techniques nieves iglesias and francisco carranza chemical engineering department, universityof sevilla, 41012 sevilla, spain received janu revised version.

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  • study on mechanism of carbonaceous gold ore during

    Request pdf study on mechanism of carbonaceous gold ore during oxidation roasting by kinetics phase transformation and structure evolution the pretreatment and effective utilization of.

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  • citeseerx a refractory gold ores in archaean

    Citeseerx document details isaac councill, lee giles, pradeep teregowda mesothermal gold ores in the archaean yilgarn craton of western australia are dominated by a pyrite 7 arsenopyrite 7 pyrrhotite sulphide assemblage. many of these ores are refractory to varying degrees and require treatment by roasting, bacterial oxidation or finer milling.

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  • usa microbial pretreatment of double

    The present invention is directed to recovery of gold from refractory and double refractory ores using a fungal agent andor culture media. usa1 microbial pretreatment of double refractory gold ores google patents microbial pretreatment of double refractory gold ores download pdf info publication number.

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  • early developments in treating pyritic and refractory

    Early developments in treating pyritic and refractory gold ores in australia 92 wilds of the australian colonies.12 further experiments on site trialled finer grinding of tailings in mexican.

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  • the leachox refractory gold process the testing

    The leachox refractory gold process has to date been applied to the selectivetreatment of several refractory gold ores but on a relatively small scale. in this paper the successful implementation of the process, from initial testing through to commissioning at one of the worlds largest refractory gold mines is described.

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  • pressure oxidation of refractory gold ores

    Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores. the main pressure oxidation products from iron sulfide minerals are sulfuric acid and metal sulfates and hematite. depending on the conditions within the autoclave, acid containing iron compounds can be formed.

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