于大伟

教授 博士生导师 硕士生导师

入职时间:2018-08-27

所在单位:冶金与环境学院

职务:Professor

学历:博士研究生毕业

办公地点:中南大学资源循环研究院资源楼201室

性别:男

联系方式:电子邮箱:dawei.yu@csu.edu.cn 电话:0731-88876255

学位:博士学位

在职信息:在职

主要任职:中国有色金属工业清洁冶金工程研究中心主任

其他任职:中南大学资源循环研究院副院长

毕业院校:多伦多大学

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Recovery of gold from sulfide refractory gold ore: Oxidation roasting pretreatment and gold extraction

发布时间:2021-05-27

点击次数:

影响因子:3.795

DOI码:10.1016/j.mineng.2021.106822

发表刊物:Minerals Engineering

摘要:Recovering gold from sulfide refractory gold ore has been an important guarantee for the sustainable development of gold industry, while there are many challenges in the treatment of sulfide refractory gold ore, such as environmental pollution and low gold recovery. In this study, A novel method for gold recovery from refractory gold ore was proposed with the purpose of improving recovery efficiency of gold and reducing environmental pollution. The method consisted of two stages roasting for arsenic and sulfur removal, gold recovery by thiourea leaching, followed by an enhanced chlorination roasting for gold recovery in the presence of pyrite. In the two-stage roasting process, the phase transition of FeAsS and FeS2 during the roasting process was analyzed. In the first stage roasting process, the removal efficiency of arsenic reached 96.98% with only 43.07% sulfur was removed. We achieved removal efficiency of 97.19% for sulfur and 84.11% of gold was exposed during the second stage roasting process. The thiourea leaching combined with pyrite enhanced chlorination roasting was first proposed to effectively extract gold from the second stage roasting slag, and the pyrite shown a great role in promoting gold extraction during chlorination roasting. In this process, gold could be effectively recovered from the sulfide refractory gold ore with a recovery efficiency of 98.06%.

论文类型:期刊论文

卷号:164

期号:3

页面范围:106822

是否译文:

发表时间:2021-04-01

收录刊物:SCI

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