摘要
难处理金矿石加石灰法焙烧时，所得焙砂含有一定量的硫化钙。研究了用多硫化物溶液直接浸出焙砂中的金，考察了温度、时间、Ｓ￣０／Ｎａ２Ｓ分子比。硫化钠浓度等因素对金浸出率的影响。在最佳浸出条件下，所得的浸出结果与除去硫化钙后的氰化浸出效果相当。多硫化物浸出具有能消除硫化钙的影响，浸金速度快，试剂基本无毒等特点。
When refractory gold ore is roasted by addition of lime, the calcine will contain some of calcium sulfide. Gold in the calcine can be leached out directly by polysulfide solution. The effects of temperature, time, S0/Na2S molar ratio and concentration of Na2S on gold leaching were investigated. The resultS of polysulfide leaching, under the optimal leachin conditions, are the same as cyanide leaching after removal of calcium sulfide. Polysulfide leaching has such advantages as elimination of the influence of CaS, speedy gold leaching and nontoalcity of reagents.
出处
《黄金》
CAS
北大核心
1995年第10期29-32,共4页
Gold
基金
国家自然科学基金
关键词
金矿石
石灰
焙烧
焙砂
硫化钙
多硫化物
浸出
roasting
refractory gold ore
lime
calcium sulfide
polysulfide
