湿法冶金

对含镍的难处理金精矿,采用细菌预氧化技术,不仅可有效地提高金的回收率,而且也可使镍得到综合回收。在选定的工艺条件下,细菌对载金矿物黄铁矿、毒砂的分解率分别达到71.0%和92.4%;对硫化镍的分解率达到88.8%。在金的浸出率从未氧化前的41.4%提高到预氧化后的95.0%的同时,镍的总回收率大于50%,实现了伴生元素的综合回收。

The technology of Bacterial oxidation is used to pretreat refractory nickelgold ore, the recovery of gold is increased and nickel is recovered as byproduct. At the choosed conditions, oxidation rate of pyrite and arsenopyrite is 71.0% and 92.4% and decompound rate of nickel sulphide can reach to 88.8%. The leaching ratio of gold raise from 41.4% to 95.0%, total recovery of nickel is over 50%.