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  • ISSN 1005-2518 
  • Founded in 1988
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Research Status of Factors Influence on Leaching of Gold with Thiosulfate

  • ZHAO Hefei ,
  • YANG Hongying ,
  • ZHANG Qin ,
  • TONG Linlin ,
  • JIN Zhenan ,
  • CHEN Guobao
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  • Northeastern University,Shenyang    110819,Liaoning,China

Received date: 2017-07-10

  Revised date: 2017-08-24

  Online published: 2018-05-19

Abstract

Thiosulfate leaching technology has become the focus of research and development of non-cyanide gold leaching technology.Especially,the copper-ammonia-thiosulfate system has been studied in-depth and long-term,because of the advantages of leaching fast,environmental friendly,less corrosive alkaline and suitable treatment of refractory ore with arsenic or carbon.There are many factors could impact on the leaching process and leaching results greatly.Such as,the type of thiosulfate,the capacity of common mineral adsorption,catalytic and decomposition,ion release in minerals,the dissolution of heavy metal ions,anion participation in the reaction process,leaching process and gold leaching effect.The impact of the various factors on the leaching process were summarized in this paper,which could be conducive to the development and improvement of thiosulfate leaching of gold.In leaching process,the type of thiosulfate salts was determined to treat different types of minerals,and different gold bearing minerals show different abilities of adsorption,dissolution and catalytic decomposition.At the same time,the effect of heavy metallic ions released by minerals on gold dissolution strongly depended on the type of ion and concentrations.Anions from reagents,the decomposition of thiosulfate and other aspects,show completely different effects on the leaching system.By adding phosphates,EDTA,CMC and other additives can improve the leaching environment and eliminate adverse effects.

Cite this article

ZHAO Hefei , YANG Hongying , ZHANG Qin , TONG Linlin , JIN Zhenan , CHEN Guobao . Research Status of Factors Influence on Leaching of Gold with Thiosulfate[J]. Gold Science and Technology, 2018 , 26(1) : 105 -114 . DOI: 10.11872/j.issn.1005-2518.2018.01.105

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