白云母对氰化浸金的吸附效应研究  

Study on the adsorption effect of muscovite on cyanide leaching gold

作　　者：陈瑜 代淑娟 韩佳宏[2] 李鹏程 李洪祥 CHEN Yu;DAI Shu-juan;HAN Jia-hong;LI Peng-cheng;LI Hong-xiang(School of Mining Engineering,Liaoning University of Science and Technology,Anshan 114051,Liaoning,China;Chaoyang Teachers College,Chaoyang 122000,Liaoning,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051 [2]朝阳师范高等专科学校,辽宁朝阳122000

出　　处：《贵金属》2022年第3期56-61,共6页Precious Metals

基　　金：国家自然科学基金项目(No.51574146)。

摘　　要：采用多种手段研究了金矿石中白云母对氰化浸出液中的金吸附效应。吸附试验考察了不同粒级白云母对溶液中金吸附率的影响,结果表明,白云母粒度越细,溶液中金的吸附率越高,吸附率由1.29%提高至5.35%;电化学溶解实验表明,白云母粒度越小,金的溶解速率越大;对浸金产物的扫描电镜(SEM)和能谱(EDS)分析表明,金的氰化络合物易吸附在白云母端点处;红外光谱分析显示,金氰化物与白云母存在化学吸附。密度泛函理论(DFT)模拟计算结果显示,金氰化物与白云母(001)表面的吸附强度为[Au(CN)_(2)]^(-)>AuCN。The adsorption effect of muscovite in gold ore on gold in cyanide leaching solution was studied by various methods.The effect of muscovite with various particle sizes on the adsorption rate of gold in solution was investigated.The results showed that the finer the muscovite size,the higher the adsorption rate of gold in solution,which increased from 1.29%to 5.35%.The electrochemical dissolution experiments show that the smaller the muscovite particle size,the faster the gold dissolves.Scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS)analysis of the leached products reveals that the cyanide complex of gold is easily adsorbed at the end of muscovite.According to infrared spectroscopy,there is chemical adsorption between gold cyanide and muscovite.Density functional theory(DFT)simulation results show that the adsorption strength of gold cyanide on the surface of white mica(001)is[Au(CN)_(2)]^(-)>AuCN。

关 键 词：氰化浸金 吸附 白云母 粒度 密度泛函理论(DFT) 

分 类 号：TD953[矿业工程—选矿] TF831[冶金工程—有色金属冶金]