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In Situ Electrochemical Investigation of Pyrite Assisted Leaching of Chalcopyrite
Qingyou Liu; Miao Chen; Kai Zheng; Yi Yang; Xiaonan Feng; Heping Li
2018
发表期刊Journal of The Electrochemical Societ
卷号165期号:13页码:II813-II819
摘要

Chalcopyrite is not only the most abundant but also one of the most refractory sources of copper. In this study, leaching experiments showed that leaching efficiency increases with increasing amounts of pyrite. In the absence of the addition of pyrite, chalcopyrite was leached at an approximate rate of 0.03 g/L/day. This rate increased to approximately 0.29 g/L/day when the pyrite/chalcopyrite (Py/Cp) weight ratio was 5. Polarization curves show that the i(couple)/i(corr) value was 1.71 at a cathode to anode (S-c/S-a) area ratio of 1:1. Galvanic corrosion tests of current confirmed that the chalcopyrite leaching selectivity improved with an increasing Py/Cp ratio. Electrochemical impedance spectroscopy (EIS) results showed that the chalcopyrite electrochemical dissolution (leaching) rate depended on the charge transfer at the double layer and the passive film characteristics and that the chalcopyrite corrosion rate decreased as soak time increased. The presence of pyrite promotes the electrochemical dissolution of chalcopyrite and results in galvanic protection.

收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8871
专题地球内部物质高温高压实验室
地球深部物质与流体作用地球化学研究室
作者单位1.Key Laboratory of High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, People’s Republic of China
2.CSIRO Mineral Resources Flagship, Clayton, Victoria 3169, Australia
3.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
推荐引用方式
GB/T 7714
Qingyou Liu,Miao Chen,Kai Zheng,et al. In Situ Electrochemical Investigation of Pyrite Assisted Leaching of Chalcopyrite[J]. Journal of The Electrochemical Societ,2018,165(13):II813-II819.
APA Qingyou Liu,Miao Chen,Kai Zheng,Yi Yang,Xiaonan Feng,&Heping Li.(2018).In Situ Electrochemical Investigation of Pyrite Assisted Leaching of Chalcopyrite.Journal of The Electrochemical Societ,165(13),II813-II819.
MLA Qingyou Liu,et al."In Situ Electrochemical Investigation of Pyrite Assisted Leaching of Chalcopyrite".Journal of The Electrochemical Societ 165.13(2018):II813-II819.
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