Based on the research progress of pymetallurgical and hydrometallurgical method in the treatment of zinc sulfide ores, a new process was proposed for the concentration of silver from the zinc silver concentrate. The process involves the sulphation roasting and dilute sulphuric acid leaching. The main influencing factors during roasting and leaching were investigated. The results showed that, when the silver zinc sulfide concentrate was roasting at 300℃ for 90 min at 1.5 ratio of sulfuric acid to the concentrate, followed by leaching with 5% sulphuric acid (8:1 liquid-solid ratio) at 85℃ for 120 h at a stirring speed of 200~300 r/min, the leaching rate of zinc exceeded 98% while the silver content in leaching was elevated to 7.24%. The silver was enriched by 7 times.%基于国内外硫化锌矿处理的火、湿法研究进展,对含锌银精矿采用硫酸化焙烧、稀硫酸浸出工艺脱除锌、富集银,考察了焙烧和浸出过程中的主要影响因素.结果表明,硫酸配比为150%,在300℃焙烧90 min,以5%稀硫酸为浸出剂,液固比8:1,搅拌转速200~300 r/min,85℃浸出120 min,最终锌的浸出率可达到98%以上,浸出渣中银含量为7.24%,银被富集7倍.
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