生物预氧化—酸性硫脲浸金联合工艺  

Combined process of biological pre-oxidation and gold leaching with acid thiourea

作　　者：任传裕 武彪 尚鹤 温建康 张其东 REN Chuan-yu;WU Biao;SHANG He;WEN Jian-kang;ZHANG Qi-dong(National Engineering Laboratory of Biohydrometallurgy,GRINM Group Co.Ltd.,Beijing 101407,China;GRINM Resources and Environment Tech.Co.Ltd.,Beijing 101407,China;General Research Institute for Nonferrous Metals,Beijing 100088,China;GRIMAT Engineering Institute Co.Ltd.,Beijing 101407,China)

机构地区：[1]有研科技集团有限公司生物冶金国家工程实验室,北京101407 [2]有研资源环境技术研究院(北京)有限公司,北京101407 [3]北京有色金属研究总院,北京100088 [4]有研工程技术研究院有限公司,北京101407

出　　处：《矿冶》2020年第4期62-67,共6页Mining And Metallurgy

基　　金：国家自然科学基金资助项目(51574036,51704028)。

摘　　要：详细介绍了生物预氧化技术的原理、硫脲浸金法的反应机理和研究进展,以及生物预氧化—酸性硫脲浸金联合工艺的研究现状及其应用前景。采用生物预氧化—酸性硫脲浸金联合工艺处理新疆某低品位难处理金矿,对影响硫脲浸金的因素进行了实验探索,得到了该体系下较优的硫脲浸出条件为:温度25℃、pH值1.5、液固比5∶1、硫脲浓度25 kg/t、浸出时间5 h、搅拌速度350 r/min,金浸出率最高可达97.84%。The principle of bio-oxidation pretreatment technology,reaction mechanism and research progress of thiourea gold leaching,and the research status and application prospect of the combined process of bio-oxidation pretreatment and gold leaching with acid thiourea are introduced in detail.The combined process was used to treat a low-grade refractory gold deposit in Xinjiang,and the factors affecting the leaching of gold with thiourea were studied experimentally.The optimum leaching conditions of thiourea under this system were obtained as follows:temperature 25℃,pH value 1.5,liquid-solid ratio 51,thiourea concentration 25 kg/t,leaching time 5 h,stirring speed 350 r/min,the highest gold leaching rate is 97.84%.

关 键 词：有色金属冶金 生物预氧化 酸性 硫脲浸金 

分 类 号：TD953[矿业工程—选矿]