Gold and arsenic recovery from calcinates of rebellious pyrite–arsenopyrite concentrates

被引：0
|
作者：
M. A. Gurman
L. I. Shcherbak
A. V. Rasskazov
机构：
[1] Russian Academy of Sciences,Institute of Mining, Far East Branch
来源：
Journal of Mining Science | 2015年 / 51卷
关键词：
Pyrite–arsenopyrite concentrates; ferric arsenates; alkaline leaching; hydrogen peroxide; arsenic; gold; recovery;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The products of stepped calcination of pyrite–arsenopyrite concentrates contain ferric arsenate phases FeAsO4, Fe4As2O11, Fe3(AsO4)2. The article reports the research data on leaching of calcines in alkaline medium including caustic soda and hydrogen peroxide used as an oxidizer. The experiments prove the efficiency of alkaline leaching with H2O2 for dissociation of gold associated with ferric arsenates (II) and (III) and for reduction of arsenic content from 1.2–1.4 to 0.006–0.15%. Preliminary leaching of calcinates enhances gold cyanidation yield from 91–92.9 to 97.3–97.9%.
引用
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页码：586 / 590
页数：4
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