从难处理金精矿中氰化浸出金、银试验研究  

Experimental research on gold and silver extraction from refractory gold concentrates

作　　者：王瑞祥[1,2] 曾斌[1] 余攀[1] 王志刚[2] 阮建国[2] 谢博毅[1] 

机构地区：[1]江西理工大学冶金与化学工程学院 [2]中国瑞林工程技术有限公司

出　　处：《黄金》2013年第8期53-55,共3页Gold

基　　金：国家自然科学基金资助项目(51164011);福建省区域科技重大合作项目(2011H4025);国家高技术研究发展计划(863计划)(2013AA064001)

摘　　要：采用氰化浸出工艺从预处理后的难处理金精矿中提取金、银。最佳氰化浸出条件为:液固比4∶1,保护碱Na2CO3调节pH值9.5～10.5,氰化钠质量分数0.4%,氰化浸出96 h。在此条件下,金、银浸出率分别达到96.53%、75.37%。同时,探索了复合保护碱对金、银浸出率的影响,使用复合保护碱m(Na2CO3)∶m(NaOH)=3∶1,金、银的浸出率分别达97.36%、75.59%,比采用单一保护碱Na2CO3时分别提高0.83%和0.22%。Gold and silver were extracted from the pretreated refractory gold concentrate by cyanide process. Un- der the optimum cyanidate conditions which are the concentration of sodium cyanide of 4 % ,the liquid to solid ratio of 4： 1, and the adjusted pH with Na2 CO3 of 9.5 - 10.5 and the leaching time of 96 h, leaching rate of gold and silver re- spectively reaches 96.53 % and 75.37 %. The effect of complex protective alkali on the leaching rate of gold and sil- ver was investigated. The influence of complex protection with alkali m（ Na2CO3 ）： m（NaOH） = 3：1 on the leaching rate is explored. The results show that leaching rate of gold and silver respectively were 97.36 % and 75.59 %, which is 0.83 % and 0.22 % higher than using Na2CO3 as single protective alkali.

关 键 词：难处理金精矿 氰化浸出 保护碱 

分 类 号：TD953[矿业工程—选矿]