Selective leaching of antimony from high-arsenic antimony-gold concentrate

被引：0
|
作者：
Liu W.-F. [1 ,2 ]
Huang K.-H. [1 ]
Yang T.-Z. [1 ]
Zhang D.-C. [1 ]
Chen L. [1 ]
机构：
[1] School of Metallurgy and Environment, Central South University, Changsha
[2] Henan Yuguang Gold and Lead Group Co., Ltd., Jiyuan
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2018年 / 28卷 / 01期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Antimony; Antimony-gold concentrate; Arsenic; Leaching; Sodium sulfide;
D O I：
10.19476/j.ysxb.1004.0609.2018.01.25
中图分类号：
学科分类号：
摘要：
Aiming at solving the problem of difficult utilization, a novel method for selective leaching of antimony from high-arsenic antimony-gold concentrate in alkaline sulfide solution was proposed. The effect of various factors on the leaching rates of antimony was investigated, and these leaching rates of gold and arsenic were also studied at the optimum conditions. The results show that the Na2S excess coefficients, NaOH concentration and temperature increase are beneficial to promote the leaching rate of antimony. Antimony content in the leaching residue can be decreased with increasing the temperature. Antimony dissolved in the leaching solution will be oxidized and precipitated in the residue with excessive prolonging time. Increasing stirring speed can improve the diffusion between sodium sulfide and concentrate. Antimony will be removed completely by increasing washing water ratio. Under the optimum conditions, the leaching rate of antimony reaches more than 99.0%, and the leaching rates of gold and arsenic are 1.50% and 0.06%, respectively. It indicates that antimony can be removed efficiently from antimony-gold concentrate, meanwhile, the dissolved losses of gold and arsenic are negligible. A black deposit of NaSbO can be precipitated from leaching solution. © 2018, Science Press. All right reserved.
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页码：205 / 211
页数：6
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