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Research articles

ScienceAsia 47 (2021): 72-77 |doi: 10.2306/scienceasia1513-1874.2021.012

Leaching of Cu from malachite using Fe2(SO4)3 solution as the leaching agent

Kui Wang, Qiwu Zhang*, Huimin Hu, Yanchu Liu

ABSTRACT:     Fe2(SO4)3 solution was, for the first time ever, used as the leaching agent to leach Cu from malachite in this work. The results confirmed that malachite (Cu2(OH)2CO3) could be easily converted to water-soluble CuSO4 through a nearly stoichiometric reaction with Fe2(SO4)3 in the leaching solution and the leaching efficiency of Cu could reach ∼100% under the optimum conditions (the Fe3+/Cu molar ratio = 0.8, the liquid-to-solid ratio = 110 ml/g, the stirring speed = 300 rpm, and the leaching time = 120 min). This study provides a new hydrometallurgical method for the treatment of carbonate-type Cu ores such as malachite (Cu2(OH)2CO3) and azurite (Cu3(OH)2(CO3)2).

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a School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070 China

* Corresponding author, E-mail: zhangqw@whut.edu.cn

Received 14 Mar 2020, Accepted 12 Dec 2020