thiosulfate leaching gold process

  • Effect of activated carbon on the thiosulfate leaching of

    The use of activated carbon as catalyst in the thiosulfate leach of gold is a process alternative that may not require the addition of surrogate oxidants (like copper) can work at temperatures as low as 30 °C and thiosulfate degradations of 21 kg per ton of ore or lower making it an attractive alternative for the leaching of gold

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  • Ammoniacal thiosulfate and sodium cyanide leaching of

    Gold leaching was primarily limited by the volume of lixiviant contacting the carbonaceous matter; however a slight kinetic limitation was observed in ammoniacal thiosulfate leaching at higher flow rat The percentage of gold leached by sodium cyanide from carbonaceous matter demineralized from autoclaved Goldstrike ore was

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  • Gold cyanidation Wikipedia

    Gold cyanidation (also known as the cyanide process or the MacArthur Forrest process) is a hydrometallurgical technique for extracting gold from low grade ore by converting the gold to a water soluble coordination complex It is the most commonly used leaching process for gold extraction

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  • Investigating the Influence of Meso 2 3 Dimercaptosuccinic

    CITATION Uceda M Choi Y Shepherd J L and Guerra E 2013 Investigating the influence of meso 2 3 dimercaptosuccinic acid on thiosulfate leaching of bulk gold electrodes in Proceedings World Gold 2013 pp 207 214 (The Australasian Institute of Mining and Metallurgy Melbourne)

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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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  • Recent advances in the development of an alternative to

    Gold leaches rapidly as the gold thiosulfate complex which because of its low affinity for graphitic carbon does not suffer the preg robbing phenomenon that is a feature of these ores in cyanide leach circuits The mild leaching conditions are also compatible with a gold recovery process involving direct recovery from the leach pulp by

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  • Effect of additives on thiosulfate leaching of a gold ore

    Effect of additives on thiosulfate leaching of a gold ore *SJ Dai PC Li QQ Wang DW Feng University of Science and Technology Liaoning Anshan China Received August 15 2017 Revised November 15 2017 The effect of additives on gold leaching was investigated using ammonium thiosulfate or calcium thiosulfate

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  • The role of ligands and oxidants in thiosulfate leaching

    following advantages of thiosulfate systems for leaching and recovery of gold compared to the conventional cyanidation process (i) fast leaching kinetics (12) (ii) possibility of separating concentrating and/or recovering dissolved gold using solvent extraction (7) anion exchange resins (13) or metal displacement (8)

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  • Thiosulfate Leaching Thiosulfate leaching is an alkaline

    Mar 17 2019· Thiosulfate Leaching Thiosulfate leaching is an alkaline process which removes gold from carbonaceous ores instead of using cyanide It is less destructive and toxic and has a higher efficiency with preg robbing ores as a leaching agent The major chemical components of thiosulfate are common fertilisers which include ammonium thiosulphate and ammonium sulphate

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  • Thiosulfate leaching process for gold extraction

    Gold leaching in thiosulfate solutions and its environmental effects compared with cyanide Oraby Elsayed A ( 2009 ) Nowadays keeping mining and the environment sustainable is a

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  • Kinetic Investigation and Dissolution Behavior of Cyanide

    May 10 2019· Thiosulfate is the most promising non cyanide leaching reagent and the only reagent which found industrial application on gold recovery from a highly carbonaceous preg robbing gold

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  • Chemical Innovations Barrick Goldstrike has a new way to

    The resin attracts the gold thiosulfate complex from the solution While TCM leach is a new process Goldstrike is also maintaining the roaster to process material

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  • process for thiourea and thiosulphate leaching Gold

    Nov 09 2015· I expect Iron content will have a profound effect on a thiosulfate leach When thiosulfate is used for dissolving silver chloride encrusted karat gold it is then cemented with steel wool I would assume nothing will go into solution until all the iron is gone

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  • thiosulfate leach of gold plate YouTube

    Feb 24 2014· 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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  • The study of the kinetics of gold leaching in the ammonium

    The gold leaching rate in ammonium thiosulfate in the presence of copper species is mainly controlled by the cathodic process which is under diffusion or mixed kinetics control The results of the rotating gold disk leaching study are consistent with those from the electrochemical study

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  • A review of the chemistry electrochemistry and kinetics

    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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  • 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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  • thiosulfate in leaching gold warilaborg

    heap leaching for antimony ore newest design; nip angle in a leaching process; principle leaching process jc; ore dressing flotation cell leaching of gold and silver; double impeller leaching agitation tank for vanadium ore stainless; leaching gold ore slurry feed pump slurry pump; mineral leaching lattice ball mill; cip plant mining

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  • Thiosulfate Process for Treating Gold Concentrates AusIMM

    treatment of gravity gold concentrates using a copper ammonia thiosulfate leach with ion exchange recovery of the gold thiosulfate This paper describes some of the advancements in the development of a potential process flow sheet for this application CITATION Dai X Breuer P Hewitt D

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  • US6632264B2 Gold recovery from thiosulfate leaching

    Processes for recovering gold from copper gold ores thiosulfate leaching or gold ores copper catalyzed thiosulfate leaching using ion exchange technology are disclosed The processes include subjecting the gold bearing and copper bearing thiosulfate solution to a pH and/or temperature adjustment to reduce tetrathionate concentration in the thiosulfate solution prior to contacting with an

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  • Thiosulfate Leaching of Gold A Review infonapl

    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 The thiosulfate leaching process it catalysed by copper and has several advantages over the conventional

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  • A Review on Alternative Gold Recovery Reagents to Cyanide

    After gold content is increased by physical and mechanical methods the concentrate is used as feeding ma terial for next steps Gold concentrates are processed by chemical methods in order torecover up to >99% gold depending on type and efficiency of the processes [14] The widely used chemical treatment process is the leaching with cyanide

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  • Kinetic Investigation and Dissolution Behavior of Cyanide

    May 10 2019· Thiosulfate is the most promising non cyanide leaching reagent and the only reagent which found industrial application on gold recovery from a highly carbonaceous preg robbing gold

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  • US6632264B2 Gold recovery from thiosulfate leaching

    Processes for recovering gold from copper gold ores thiosulfate leaching or gold ores copper catalyzed thiosulfate leaching using ion exchange technology are disclosed The processes include subjecting the gold bearing and copper bearing thiosulfate solution to a pH and/or temperature adjustment to reduce tetrathionate concentration in the thiosulfate solution prior to contacting with an

    [Get Price]