银精矿在[Bmim]HSO_4离子液体—硫脲体系中的浸出行为  

Leaching Behaviors of Silver Concentrate in[Bmim]HSO_4 Ionic Liquids and Thiourea Solution

作　　者：方夕辉[1] 钟名清 尹艳芬[2] 张帅[1] 陈杜娟[3] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]江西理工大学经济管理学院,江西赣州341000 [3]西北矿冶研究院,甘肃白银730900

出　　处：《有色金属（冶炼部分）》2014年第5期38-41,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省科技支撑计划项目(2011BBG70002-1);江西省教育厅科技计划项目(GJJ11480)

摘　　要：用[Bmim]HSO4离子液体取代硫酸进行了硫脲浸取银精矿的浸出行为研究。考察了磨矿细度、[Bmim]HSO4浓度、硫脲浓度、Fe3+浓度、液固比、浸出时间等对银浸出率的影响。结果表明,在磨矿细度-0.043mm占80%、硫脲浓度0.18mol/L、[Bmim]HSO4浓度0.3mol/L、Fe3+浓度7.5mmol/L、液固比3∶1、浸出时间18h的最优条件下,银浸出率可达到73.96%。在[Bmim]HSO4-硫脲、H2SO4—硫脲和氰化体系中,[Bmim]HSO4—硫脲体系不但银浸出率最高,而且浸出时间最短。The leaching behaviors of silver concentrate in [Bmim]HSO4 ionic liquids and thiourea solution were studied. The effects of grinding fineness, [Bmim] HSO4 concentration, thiourea and Fea＋ concentra- tions, ratio of liquid to solid, and leaching time on silver leaching rate were investigated. The results show that silver leaching rate is 73.96% under the optimum conditions including particle size of 80%-0. 043 mm, thiourea concentration of 0.18 mol/L, [Bmim]HSO4 concentration of 0.3 mol/L, Fea＋ concentration of 7.5 mmol/L, ratio of liquid to solid of 3 = 1 and leaching time of 18 h. In comparison with cyaniding leaching and sulfuric acid thiourea leaching, the highest silver leaching rate can be achieved in [Bmim] HSO4-thiourea solution with the shortest leaching duration.

关 键 词：[Bmim]HSO4 离子液体 浸出 硫脲 银精矿 

分 类 号：TF832[冶金工程—有色金属冶金]