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thiosulfate leaching of gold from ore

  • US6632264B2Gold recovery from thiosulfate leaching

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

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  • Concentrated Sulde Ore Using Ammonium Thiosulfate

    thiosulfate leaching [21]. The application of thiosulfate leaching behavior for Au recovery depends on the associated minerals. Pyrite, chalcopyrite, chalcocite, bornite, pyrrhotite, and arsenopyrite are the main sulfide minerals responsible for locking Au in refractory sulfide gold ores [22]. The leaching behavior of these

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  • GOLD LECHING FROM A SAUDI ORE BY THE NONPOLLUTING

    thiosulfate leaching of gold Chen, 2008. This shows how much a mineralogical investigation is important to be performed before leaching study of any gold ore by the thiosulfate process. Several gold localities are scattered in the Arabian Shield of the kingdom of Saudi Arabia which has about 20 million tons of recoverable gold ores.

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  • PDF Thiosulfate leaching of goldA reviewMark Aylmore

    Hemmati et al. 1989 investigated the thiosulfate leaching of gold from carbonaceous ore that contained 2.5% organic carbon. The optimum conditions for gold extraction were found to be 35Inquire Now

  • Thiosulfate Leaching of MiddleRefractory Gold Ore

    Leaching of middlerefractory gold ore show that both of the consumption of thiosulfate and leaching rate was decreased compare to the traditional copperammonia thiosulfate system. Thiourea is not stable in base solution,

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  • Thiosulfate leaching of goldA reviewRequest PDF

    Thiosulfate leaching can be considered a nontoxic process, the gold dissolution rates can be faster than conventional cyanidation and, due to the

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  • Extraction of gold from a gold concentrate using a

    Apr 04, 2022The gold leaching kinetics of the synthetic lixiviant was found to be faster than that of NaCN as shown in Fig. 5a. Fast gold leaching occurred in the initial leaching stage of 8 h. Gold extractions of 87.0% and 78.3% were obtained after 8 h using the synthetic lixiviant and NaCN, respectively.

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  • PDF Determination of the potential gold electrowinning

    Waste Management gold ore by ammoniacal thiosulphate leaching. Mineral Processing and Research 29: 714726. Extractive Metallurgy Review 29: 6882. Kasper AC, Berselli GBT, Freitas BD, et al. 2011b Printed wiring boards Aylmore MG 2005 Alternative lixiviants to cyanide for leaching gold ores.

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  • Leaching of Silver and Gold Contained in a Sedimentary Ore

    Some sedimentary minerals have attractive contents of gold and silver, like a sedimentary exhalative ore available in the eastern of Hidalgo in Mexico. The gold and silver contained represent an interesting opportunity for processing by nontoxic and aggressive leaching reagents like thiosulfate. The preliminary kinetic study indicated that the leaching process

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  • A thermodynamic analysis on thiosulfate leaching of gold

    Request PDFA thermodynamic analysis on thiosulfate leaching of gold under the catalysis of Fe3+/Fe2+ complexesThiosulfate is an ecofriendly gold lixiviant that is

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  • Dissolution of Gold and Silver with Ammonium Thiosulfate

    Apr 20, 2017In the second stage, leaching of gold and silver values with ammonium thiosulfate was performed, and this yielded a removal of 97.06% silver and gold 86.66% with a liquidsolid ratio of 2:1. Thiosulfate consumption was 10.36 g/L, which is economically affordable for this head ore with gold and silver content of 0.3 g/ton and 310 g/ton

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  • PDF Ammoniacal thiosulfate leaching of gold from a

    Ammoniacal thiosulfate leaching of gold from a refractory ore using a full factorial design Oktay Celep1, Haci Deveci1, brahim Alp1, Ersin Yazici1 Duygu DinInquire Now

  • Extraction of gold from a gold concentrate using a

    Apr 04, 2022The gold leaching kinetics of the synthetic lixiviant was found to be faster than that of NaCN as shown in Fig. 5a. Fast gold leaching occurred in the initial leaching stage of 8 h. Gold extractions of 87.0% and 78.3% were obtained after 8 h using the synthetic lixiviant and NaCN, respectively.

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  • [Biooxidation of goldbearing sulfide ore and subsequent

    The gold and silver recovery rates by thiosulfate leaching were 64.0 and 57.3%, respectively. Gold and silver recovery rates from unoxidized ore control experiment by cyanidation were 20.9 and 26.8%, respectively. Thiosulfate leaching of unoxidized ore allowed the extraction of 38.8 and 24.2% of the gold and silver, respectively.

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  • [Biooxidation of goldbearing sulfide ore and subsequent

    The gold and silver recovery rates by thiosulfate leaching were 64.0 and 57.3%, respectively. Gold and silver recovery rates from unoxidized ore control experiment by cyanidation were 20.9 and 26.8%, respectively. Thiosulfate leaching of unoxidized ore allowed the extraction of 38.8 and 24.2% of the gold and silver, respectively.

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  • Barrick Thiosulfate Leaching of Double Refractory Ore

    the ore, but autoclaves cannot; autoclaves can only remove the sulfides. The thiosulfategold 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 autoclaveprocessed double

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  • Thiosulfate Leaching of GoldSadia Ilyas, Aqsa Zia, Jae

    In the Von Patera process, gold and silver ores were subjected to a chlorination roasting followed by leaching in a thiosulfate solution. In a thiosulfate leach liquor, the formation of gold and silver thiosulfate complexes proceeds via the catalytic oxidation of the zerovalent metal by a suitable soluble metal complex, acting as the primary

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  • 8 Types of Gold Ore Properties and Ways to ProcessFote

    Nov 30, 20211 Wash, filter and grind the granite ore with into smaller pieces. 2 Put the ground ore into a tank containing a dilute cyanide solution and add zinc. The chemical reaction between a dilute cyanide solution and zinc will separate the gold from the ore. 3 Use a filter press to remove the gold from the solution.

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  • PDF Determination of the potential gold electrowinning

    Waste Management gold ore by ammoniacal thiosulphate leaching. Mineral Processing and Research 29: 714726. Extractive Metallurgy Review 29: 6882. Kasper AC, Berselli GBT, Freitas BD, et al. 2011b Printed wiring boards Aylmore MG 2005 Alternative lixiviants to cyanide for leaching gold ores.

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  • Sodium Thiosulphate Gold Leaching

    Jun 02, 2016Ammoniacal thiosulphate leaching of gold ore Thiosulphate as an Alternative to Cyanide for Gold Processing HYPOCHLORITE LEACHING OF GOLD ORE TREATMENT OF A COPPERRICH GOLD ORE BY AMMONIA ASSISTED CYANIDE LEACHING Electrochemistry and Mechanism of Leaching Gold with Ammoniacal Thiosulphate

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  • US6632264B2Gold recovery from thiosulfate leaching

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

    Inquire Now
  • Method of gold extraction from sulphide goldbearing ores

    Method of gold extraction from sulphide goldbearing ores. C22B3/04by leaching C22B0003180000 takes precedence;; C22B11Obtaining noble metals. FIELD: metallurgy. SUBSTANCE: method includes leaching by solution of mixture of hydrosulphite and sodium thiosulfate and ammonium, sorption of complex thiosulfategold on heavybasic anionite

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  • MetalsFree FullTextLeaching Behavior of Gold and

    Aug 01, 2020Ammonium thiosulfate is an alternative lixiviant for the hydrometallurgical treatment of sulfide gold ores. The present study is primarily focused on ammonium thiosulfate leaching of gold Au and silver Ag from the sulfide ore Sunshin mine in Korea. The main chemical composition of the concentrate was Au 84 ppm, Ag 852 ppm, Fe 18.9%, Si

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  • Ammoniacal thiosulfate leaching of refractory oxide gold

    Article. Ammoniacal thiosulfate leaching of refractory oxide gold ore. May 2017; International Journal of Mineral Processing 164

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  • Thiosulphate LeachingSGS South Africa

    Thiosulphate Leaching. Thiosulfate leaching is a process that recovers gold from ore without the use of cyanide. SGS developed the thiosulfate leaching process because in some jurisdictions, increased regulation pressure means that cyanide cannot be used or transported. We are a global technical leader in the field of thiosulfate leaching.

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  • THIOSULPHATE LEACHINGSGS

    as pregrobbing ores naturally occurring carbonaceous material that preferentially absorbs the gold cyanide complex but not the gold thiosulphate complex, it can yield substantially better recovery than cyanide.The thiosulphate leaching of gold ores has great potential to reduce the impact on the environment compared to the cyanidation

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  • Ammoniacal thiosulfate leaching of refractory oxide gold ore

    Ammoniacal thiosulfate leaching of refractory oxide gold ore was investigated. According to Xray fluorescence and fire assay analyses, the ore contained about 33.01 wt% Si, 8.53 wt% Al, 7.26 wt% K, 3.00 wt% Fe, and 2.80 ppm Au.Moreover, Xray diffraction analysis and mineralogical studies using polished thin sections showed that the ore was composed of quartz, epidote,

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  • Thiosulfate Leaching of Gold from Copper Bearing Ores

    thiosulfate has been used in photography for many decades. It is also used as fertilizer and from an environmental standpoint, has a definite advantage over cyanide. Dissolution rates of gold and silver in thiosulfate are comparable to those for thiourea and faster than cyanidExperimentalInquire Now
  • A thermodynamic analysis on thiosulfate leaching of gold

    Request PDFA thermodynamic analysis on thiosulfate leaching of gold under the catalysis of Fe3+/Fe2+ complexesThiosulfate is an ecofriendly gold lixiviant that is

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  • Enhanced Gold Recovery from Alkaline Pressure Oxidized

    Jan 10, 2022Gold ore from Goldstrike, NV, is a typical refractory gold ore containing sulfide and carbonaceous matter. Alkaline pressure oxidation followed by thiosulfate gold leaching results in low gold recovery 59.5%. In this study, mechanical activation was applied to alkaline pressure oxidation discharge by wet grinding in a stirred media mill.

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  • Method of gold extraction from sulphide goldbearing ores

    Method of gold extraction from sulphide goldbearing ores. C22B3/04by leaching C22B0003180000 takes precedence;; C22B11Obtaining noble metals. FIELD: metallurgy. SUBSTANCE: method includes leaching by solution of mixture of hydrosulphite and sodium thiosulfate and ammonium, sorption of complex thiosulfategold on heavybasic anionite

    Inquire Now
  • Leaching of Silver and Gold Contained in a Sedimentary Ore

    Some sedimentary minerals have attractive contents of gold and silver, like a sedimentary exhalative ore available in the eastern of Hidalgo in Mexico. The gold and silver contained represent an interesting opportunity for processing by nontoxic and aggressive leaching reagents like thiosulfate. The preliminary kinetic study indicated that the leaching process

    Inquire Now
  • A thermodynamic analysis on thiosulfate leaching of gold

    Request PDFA thermodynamic analysis on thiosulfate leaching of gold under the catalysis of Fe3+/Fe2+ complexesThiosulfate is an ecofriendly gold lixiviant that is

    Inquire Now
  • Thiosulphate LeachingSGS South Africa

    Thiosulphate Leaching. Thiosulfate leaching is a process that recovers gold from ore without the use of cyanide. SGS developed the thiosulfate leaching process because in some jurisdictions, increased regulation pressure means that cyanide cannot be used or transported. We are a global technical leader in the field of thiosulfate leaching.

    Inquire Now
  • PDF Ammoniacal thiosulfate leaching of gold from a

    Thiosulfate leaching has great potential for the treatment of carbonaceous ores due to the low adsorption of gold thiosulfate complex on carbonaceous matter kInquire Now

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