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thiosulfate gold leaching

  • Barrick Thiosulfate Leaching of Double Refractory Ore

    The thiosulfate gold complex formed in thiosulfate leaching is not attracted to carbon so this failure to remove the carbon is no longer an issue. Thus, the use of thiosulfate with autoclave processed double refractory ores does not result in the loss of the gold complex in the tails.

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  • thiosulfate leach of gold plate YouTube

    Feb 24, 20140183;32;recovered powders from a sodium thiosulfate leach of gold plated pins. if all my experiments can be perfected, i will have a safe, non toxic process to remove gold from gold plated objects and

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  • Substitution Recovery of Gold from Copper Ethylenediamine

    Jul 27, 20180183;32;The substitution method of recovering gold from thiosulfate ethylenediamine (en) Cu 2+ leaching solution using copper powder was studied. The effects of reaction time, stirring speed, pH, thiosulfate concentration, en/Cu 2+ molar ratio, Cu/Au + mass ratio, and temperature on gold

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  • thiosulfate leaching Gold Refining Forum

    May 19, 20110183;32;Has anyone here actually used thiosulfate for leaching gold ore,and had positive results,that can be repeatable as a real leaching process? Has anyone found a real working precipitation process to recover the gold,that works well,and is dependable? Also getting the gold out of the precipitates seems to be a real pain.

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  • Gold strike with thiosulphate MINING.COM

    The CSIRO patented cyanide free thiosulphate process is adding value to Barrick Gold Corporations gold operation. The first gold bar produced with the thiosulphate process was poured in late

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  • AMMONIACAL THIOSULPHATE LEACHING OF A COPPER RICH GOLD

    PDF In this current study, the extraction of gold from a high grade copper rich gold ore by copper assisted ammoniacal thiosulphate leaching was studied by adopting Taguchi L 9, (3 3

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  • US8097227B2 Method for thiosulfate leaching of precious

    Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ heap leaching or lixiviants that include one or more blinding agents.

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  • Sodium thiosulfate

    Sodium thiosulfate is used in gold mining, water treatment, analytic chemistry, the development of silver based photographic film and prints, and medicine. The medical uses of sodium thiosulfate include treatment of cyanide poisoning and pityriasis. It is on the World Health Organization's List

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  • Thiosulfate leaching of goldA review ScienceDirect

    The ammoniacal thiosulfate leaching process for gold and silver extraction has been reviewed in terms of leaching mechanism, thermodynamics, thiosulfate stability, and gold recovery options. The application to different ore types and process options have also been discussed.

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  • Ammoniacal thiosulfate and sodium cyanide leaching of

    The percentage of gold leached by ammoniacal thiosulfate was found to depend on the initial gold content of the carbonaceous matter since an equivalent, small amount of gold was taken up by all carbonaceous matters examined. Gold leaching was primarily limited by the volume of lixiviant contacting the carbonaceous

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  • Thiosulfate leaching of gold A review Request PDF

    Thiosulfate leaching can be considered a non toxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the decreased interference of foreign cations, high

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  • Thiosulfate Leaching as an Alternative to Cyanidation

    The thiosulfate leaching has been applied to several mild refractory gold ores, such as, complex ore, refractory carbonaceous ores, copper bearing gold ores, ores containing lead and zinc, gold ores associated with sulfide minerals and the gold ore associated with manganese.

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  • Leach Gold using Hyposulphite Of Sodium AKA Thiosulfate

    Thiosulfate Gold Extraction Leach These solutions have very little solving action upon the natural sulphide contained in gold bearing ore, and should be suitable solutions for the treatment of gold or silver ore, as they have a greater solving power than cyanide of potash, are not poisonous, and can be obtained in very large quantities at a

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  • Thiosulfate copper ammonia leaching of pure gold and

    In thiosulfate gold leaching, Cu2+ ions are commonly used as oxidizing agents, while the thiosulfate ion acts as a ligand forming a soluble gold thiosulfate ammonia complex (Aylmore and Muir, 2001). It was suggested that gold leaching in the absence of Cu2+ ions, with an external current acting as a oxidizer, is not possible

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  • Sodium Thiosulphate Gold Leaching

    The gold industry has been seeking alternative reagents for leaching gold from low grade ores for the past 25 years. The cost and transport of cyanide, the poor recovery of gold from carbonaceous ores, the lack of selectivity of cyanide towards copper minerals and the cost of waste treatment are real factors which can make cyanide unattractive in some circumstances.

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  • Gold extraction

    Thiosulfate leaching has been proven to be effective on ores with high soluble copper values or ores which experience preg robbing the absorption by carbonaceous components which preferentially absorbs gold and gold cyanide complexes. Leaching through Bulk Leach Extractable Gold, or BLEG, is also a process that is used to test an area for gold

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  • A Method for Leaching or Dissolving Gold from Ores or

    lurgical gold extraction routes utilize a leaching step to produce a gold bearing solution as an intermediate product while the recycling of secondary gold from electronic and precious metal scrap is based on the selective and fast dissolu tion of the precious metal. Therefore, A Method for Leaching or Dissolving Gold from Ores or Precious

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  • Associated Sulfide Minerals in Thiosulfate Leaching of

    The effects of some associated minerals on thiosulfate gold leaching were studied through thermodynamic analysis and leaching experiments on composite ore samples containing various minerals and a reference silicate gold ore.

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  • process for thiourea and thiosulphate leaching Gold

    Nov 09, 20150183;32;butcher wroteI suspect iron with thiosulfate would form ferrous sulfate and precipitate the gold, while your trying to leach, basically not leaching the gold into solution (at least to any extent). qst42know is this your thought?

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  • AMMONIACAL THIOSULPHATE LEACHING OF A COPPER RICH GOLD

    PDF In this current study, the extraction of gold from a high grade copper rich gold ore by copper assisted ammoniacal thiosulphate leaching was studied by adopting Taguchi L 9, (3 3

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  • THIOSULPHATE LEACHING sgs

    THIOSULPHATE LEACHING AN ALTERNATIVE TO CYANIDATION IN GOLD PROCESSING ALTERNATIVES TO CYANIDE IN GOLD PROCESSING THIOSULPHATE LEACHING Thiosulphate leaching is a process that removes gold from gold bearing ores without the use of cyanide. Although not as aggressive a leaching agent as cyanide, thiosulphate offers several technological

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  • Substitution Recovery of Gold from Copper Ethylenediamine

    Jul 27, 20180183;32;The substitution method of recovering gold from thiosulfate ethylenediamine (en) Cu 2+ leaching solution using copper powder was studied. The effects of reaction time, stirring speed, pH, thiosulfate concentration, en/Cu 2+ molar ratio, Cu/Au + mass ratio, and temperature on gold

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  • Thiosulfate leaching of gold from waste mobile phones

    Abstract The present communication deals with the leaching of gold from the printed circuit boards (PCBs) of waste mobile phones using an effective and less hazardous system, i.e., a copper ammonia thiosulfate solution, as an alternative to the conventional and toxic cyanide leaching of gold.

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  • (PDF) Thiosulfate leaching of gold from waste mobile

    Thiosulfate leaching of gold from waste mobile phones Ha V.H., Lee J. C., Jeong J., Hai H.T., Jha M.K. Institute for Environmental Science and Technology, Hanoi University of Technology (HUT), 1 Dai Co Viet, Hanoi, Viet Nam; Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), 92, Gwahang no, Yuseong gu, Daejeon 305 350, South Korea; Metal

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  • Associated Sulfide Minerals in Thiosulfate Leaching of

    The effects of some associated minerals on thiosulfate gold leaching were studied through thermodynamic analysis and leaching experiments on composite ore samples containing various minerals and a reference silicate gold ore.

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  • Gold Cementation from Ammonium Thiosulfate Solution

    Keywords gold, zinc, copper, aluminium, thiosulfate, cementation 1. Introduction Ammonium thiosulfate leaching is an alternative gold ex traction method to cyanidation because of its low toxicity.17) However, the gold recovery method from the leach solution was not widely studied. In our study of gold leaching,8) an

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  • Thiosulfate leaching of goldA review ScienceDirect

    Thiosulfate leaching can be considered a non toxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the decreased interference of foreign cations, high gold recoveries can be obtained from the thiosulfate leaching of complex and carbonaceous type ores. In addition, thiosulfate can be cheaper than cyanide.

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  • Fundamental aspects of gold leaching in thiosulfate

    The kinetics and mechanism of gold leaching in the ammonia thiosulfate copper (ATS Cu) system have been studied using the rotating electrochemical quartz crystal microbalance (REQCM). Anodic polarization, cathodic polarization and leaching experiments were included in this study.

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  • Using Nickel as a Catalyst in Ammonium Thiosulfate

    Using Nickel as a Catalyst in Ammonium Thiosulfate Leaching for Gold Extraction Harunobu Arima1, Toyohisa Fujita2 and Wan Tai Yen3 1Graduate Student, Queens University.Present address Akita Zinc Co., , Akita 011 8555, Japan

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  • Gold leaching by organic base polythionates new non toxic

    The proposed method of the gold recovery comprises leaching with a solution of a mixture of sodium and ammonium hydrosulfite and thiosulfate, by sorption of the thiosulfate gold complex on a highly basic anion exchanger and by isolation of the highly basic anion exchanger, the sorption being carried out 2 10 hours after the leaching. Then the

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