how to make thiosulfate leaching of gold

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  Exploring Non-ammoniacal Thiosulfate Gold Leaching and Limited Gold ...

  2024313 · The application of pressure oxidation (POX) followed by thiosulfate gold leaching is an efficient method used to extract gold from double refractory gold ores containing both sulfide and carbonaceous matter. This process is expected to result in high gold recovery rates, as it liberates gold from sulfides and eliminates the preg-robbing …

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  Improvement of gold bioleaching extraction from waste …

  2023515 · Selection of the optimal conditions has led to the highest bio-production of thiosulfate (500 mg/L). The impact of STPCBs content, ammonia, ethylenediaminetetraacetic acid (EDTA), and leaching time on Cu bio-dissolution and gold bio-extraction were investigated using enriched-thiosulfate spent medium.

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  Metals | Free Full-Text | Recovery of Gold from Pregnant Thiosulfate ...

  This review is devoted to an integrated evaluation of the current use and future development of the resin adsorption technique in gold recovery from pregnant thiosulfate solutions. Comparisons are firstly made with other recovery techniques, including precipitation, activated carbon adsorption, solvent extraction, electrowinning and mesoporous silica …

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  Effect of Pyrite on Thiosulfate Leaching of Gold and the Role …

  2017719 · The effect of pyrite and the role of ammonium alcohol polyvinyl phosphate (AAPP) during gold leaching in ammoniacal thiosulfate solutions were investigated using pure gold foils. The results showed that pyrite catalyzed the decomposition and also significantly increased the consumption of thiosulfate. This detrimental effect became …

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  The ultrasound leaching kinetics of gold in the thiosulfate leaching ...

  202091 · Abstract The effect of ultrasound on gold leaching rate and kinetics was investigated in the Co-NH 3 -S 2 O 32− system. First, the effects of ultrasound power, temperature, the concentration of thiosulfate, cobalt and ammonia on gold leaching rate were studied under ultrasound.

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  Cyanide-free gold recovery - CSIRO

  We have developed a safe, cyanide and mercury-free process for recovering gold. After successful demonstration and field trials, the technology is being brought to market through Australian company, Clean Mining.

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  Metals | Free Full-Text | A Pretreatment of Refractory Gold …

  2023728 · The use of thiosulfate to extract gold from refractory ores is promising because of its non-toxicity and high selectivity. Sulfide minerals (i.e., pyrite, arsenopyrite, chalcopyrite), major gold carriers in refractory gold ores, however, hinder gold extraction due to the high consumption of a lixiviant. In this study, a new method to improve gold …

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  A thermodynamic analysis on thiosulfate leaching of gold …

  202241 · In this paper, a systematic thermodynamic analysis on the thiosulfate leaching of gold catalyzed by Fe 3+ /Fe 2+ and the ligand of EDTA 4–, oxalate (ox 2– ), cyanide (CN –) or citrate (cit 3–) is conducted by constructing a series of predominance area and speciation diagrams.

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  Efficient and Selective Recovery of Gold from Thiosulfate Leaching ...

  20231019 · Abstract Designing suitable adsorbents is a key challenge in the recovery of Au (I) from thiosulfate gold-leaching solutions as the ideal adsorbent not only possesses abundant active sites with high affinities and selectivities toward Au (I), but also demonstrates fast recovery of Au (I) at high purity and large capacity.

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  Alternative Lixiviants to Cyanide for Leaching Gold Ores

  201611 · Thiosulfate Leaching. In recent years, thiosulfate has been considered an attractive alternative to cyanide for leaching gold. A process using thiosulfate has been developed and commercialized for Barrick Gold's Goldstrike operation in Nevada, USA.

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