吉林某含铜金矿硫代硫酸盐浸金试验研究

吉林某含铜金矿含铜11%～13%,含金30～50g/t,由于金部分被黄铜矿等硫化物包裹,直接氰化浸出,金的浸出率只有48.9%。针对矿石性质,进行了硫代硫酸盐-氨水体系的浸金试验研究,重点考察了浸出时间、浸出液固比、硫代硫酸盐浓度和氨水浓度等因素对金浸出的影响。结果表明,在综合条件下浸出24h,金浸出率可达92%。为非氰浸金提供了一种新的思路和工艺,对类似的含铜金矿中金的回收有重要借鉴意义。后续还要加强对浸出液中金的回收研究。

Recovery of Gold from a Copper-bearing Gold Ore by Thiosulfate Leaching in Jilin

Jilin copper-bearing gold mine contains 11%～13%copper,30～50g/t gold.Since the gold is partially wrapped by chalcopyrite and other sulfides,the gold leaching rate is only 48.9% by direct cyanide leaching.Directed at the ore properties,research on gold leaching by the thiosulfate-ammonia system was carried on,focusing on the influence of leaching time,liquid-solid ratio,thiosulfate concentration and ammonia concentration on the leaching rate.The results showed that the leaching rate could reach 92% by leaching for 24 hours under the synthesis condition.This paper provides new ideas and technology for non-cyanide leaching.Meanwhile,it gives important reference to this kind of ore.Of course,the research on the recovery of gold in the leaching liquid should be enhanced.