期刊
MINERALS ENGINEERING
卷 179, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mineng.2022.107438
关键词
Glycine thiosulfate; Gold leaching; Thermodynamic analysis
资金
- National Key R&D Program of China [2019YFC1908404, 2019YFC1907405]
- National Natural Science Foundation of China [51904124]
- Distinguished Pro-fessor Program of Jinggang Scholars in institutions of higher learning, Jiangxi Province
- Jiangxi University of Science and Technology Landing Project [2020033]
- Jiangxi Provincial Department of Education Science and Technology Research Project [GJJ210875]
This paper proposes a novel copper-catalytic glycine thiosulfate collaborative system for gold leaching and constructs relevant thermodynamic diagrams and electrochemical models. The results show that this system has a wider pH range and lower consumption, providing a theoretical basis for gold leaching.
Glycine and thiosulfate, as alternatives to cyanide, are all considered to be one of the most promising lixiviants for gold. In this paper, a novel copper-catalytic glycine thiosulfate collaborative system of gold leaching was proposed. Based on the available thermodynamic data, a series of Eh-pH and species distribution diagrams for gold/copper-glycine-thiosulfate system under various conditions were constructed using thermodynamic calculations. The analysis results for thermodynamic diagrams indicated that the copper-glycine-thiosulfate system had many potential advantages over the copper-ammonia/citrate-thiosulfate system, such as wider pH range and lower thiosulfate consumption. The electrochemical models for the copper-catalytic mechanism of gold leaching with glycine-thiosulfate were also proposed in this study. Moreover, the relevant results obtained in this study provide a theoretical basis for the optimization of gold leaching with copper-catalytic glycine thiosulfate system.
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