某含铜氧化金矿石氨氰法浸金工艺试验研究

Study on gold extraction from an oxidized gold ore with copper by ammonia cyanide leaching

针对某含铜金矿石进行了氨氰法浸金及浸出贵液脱铜试验研究。其结果表明:在一定条件下,可获得较好的技术指标,浸渣金品位0.38 g/t,浸出贵液金、铜平均质量浓度分别为2.27 mg/L、61.94 mg/L,渣计金浸出率为89.44%;采用双氧水除铜,铜沉淀率为85.85%,氧化沉淀渣铜品位超过50%,可以铜精矿出售。

Gold extraction was studied from a gold ore with copper by ammoma cyamtle teaching in me paper as well as copper removal from pregnant solutions. The leaching results showed that in certain conditions ,satisfactory technical indexes could be obtained, with leaching residues grade of 0.38 g/t, average mass concentration of gold and copper in leaching pregnant solutions respectively are 2.27 mg/L and 61.94 rag/L, gold leaching rate according to residues is 89.44 %. Hydrogen peroxide is used for copper removal, gaining a copper precipitation rate of 85.85 %, and copper grade in the oxidation precipitation slags is over 50 %, making it possible to sell them as copper concentrates.