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.
出处
《黄金》
CAS
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)
关键词
难处理金精矿
氰化浸出
保护碱
refractory gold concentrate
cyanide leaching
protective alkali
