中南大学学报（自然科学版）2018，Vol.49Issue(4)：786-793,8.DOI:10.11817/j.issn.1672-7207.2018.04.003
含锑难处理金矿选择性脱除锑
Selective removal of antimony from antimonial refractory gold ores
摘要
Abstract
In order to avoid the negative influence of antimony on the cyanide process, the method of sodium sulfide leaching was proposed to selective remove antimony from refractory gold ores. The key factors influencing the leaching ratio of antimony were investigated, and these leaching ratios of gold and arsenic were also studied under the optimum condition. The results show that the excess coefficient of Na2S, NaOH mass concentration, temperature, liquid-to-solid ratio and washing water ratio benefit the leaching ratio of antimony. But the leaching ratio of antimony decreases with the increase of reaction time and enhancing stirring speed. Antimony mass fraction in the leach residue can be decreased to 0.04% by increasing washing water ratio to 4.0. Under the optimum condition, the leaching ratio of antimony reaches 96.64%, but those of gold and arsenic are only 1.44% and 0.41%, respectively. XRD analysis reveals that black mixture precipitated from the leach solution is composed of Na2FeS2, S and FeS2, indicating that less FeS2 first dissolves during leaching and then precipitates from the solution.关键词
难处理金矿/浸出/锑/硫化钠Key words
refractory gold ores/leach/antimony/sodium sulfide分类
矿业与冶金引用本文复制引用
刘伟锋,孙百奇,邓循博,张杜超,陈霖,杨天足..含锑难处理金矿选择性脱除锑[J].中南大学学报（自然科学版）,2018,49(4):786-793,8.基金项目
国家自然科学青年基金项目资助(51404296) （51404296）
中国博士后科学基金面上资助项目(2016M602427)(Project(51404296) supported by the Young Scientists Fund of National Natural Science Foundation of China （2016M602427）
Project(2016M60247) supported by Postdoctoral Science Foundation of China) （2016M60247）
