高硫银金精矿碱浸预处理试验研究与生产实践

Experimental research and production practice of alkaline leaching pretreatment of high sulfur content silver and gold concentrates

针对湖北鑫荣矿业有限公司高硫银金精矿氰化浸出过程中银、金出现"返沉淀"的现象,对精矿采用高锰酸钾进行碱浸氧化预处理,有效地消除了银、金的"返沉淀"现象,银、金的氰化浸出率比预处理前分别提高4.65%和1.43%。

In light of the re-precipitation phenomenon happened during the cyanide leaching process of high sulfur content silver and gold concentrate in Hubei Xinrong mining industry company, an alkaline leaching and oxidation pre- treatment process carried out to the concentrate is applied by＇ using KMn04 which effectively removed the re-precipita- tion. Compared to the case before the pretreatment,the cyanide leaching rates of silver and gold are raised by 4.65 % and 1.43 % respectively.