摘要
针对金矿石中,金与硫化矿物伴生的特点,将金矿矿石充分细磨后,采用强化措施进行全泥氰化浸出。然而,硫化矿物在一定程度上溶于氰化物溶液,产生的可溶性硫化物将阻碍金的氰化浸出。为减少硫化矿物对金氰化浸出的影响,采用鼓空气的方法对矿浆进行预处理。同时,在氰化浸出过程中,通过对磨矿细度、溶解氧、硝酸铅以及氰化钠质量分数的控制,优化了金浸出效果。最终,在减少氰化物消耗量的前提下,金浸出率提高到95.4%。
According to the characteristics of association of gold and sulfide minerals in gold deposits, strengthe- ning measures were applied in the all-sliming cyanide extraction of gold after the gold ore was fully ground. However, the sulfide minerals were to some extent soluble in cyanide solutions, and the emerged soluble sulfide hindered the cy- anide leaching of gold. In order to reduce the negative effects of sulfide ore on cyanide leaching, the air-blown method was first used to pretreat the ore slurry. The leaching effect was optimized by controlling the grinding particle size of gold ores, the cyanide concentration and the amount of dissolved oxygen and lead nitrate in the cyanide leaching process. Ultimately, the leaching rate of gold was increased to 95.4 % while the cyanide consumption was reduced.
出处
《黄金》
CAS
2013年第8期56-59,共4页
Gold
关键词
金矿石
硫化矿物
氰化浸出
金
gold ores
sulfide minerals
cyanide leaching
gold
