铅阳极泥处理技术的研究进展

铅阳极泥是粗铅电解精炼过程产出的一种副产物，是重要的二次资源，富含多种有价金属元素.从铅阳极泥资源中综合回收金、银等有价金属元素越来越受到重视.论文详细介绍了近年来铅阳极泥火法处理工艺、湿法处理工艺、火法-湿法联合处理工艺的研究进展，并对真空处理技术及直接制备纯物质技术进行了报道.针对云南某冶金企业高铋砷铅阳极泥的特点，作者所在课题组提出“加压氧化碱浸脱砷锑铅-熔铸粗铋合金-铋电解精炼”的处理新工艺，在分离砷锑铅的同时，实现了铋的清洁提取与金银的高度富集.结果表明:铋的回收率>98 %，锑、铅的回收率>96 %，金的回收率>99 %，银的回收率>97 %.铋电解阳极泥中金、银含量从铅阳极泥原料中的22 g/t、3 595 g/t分别富集到201 g/t、31 270 g/t. 

Research development of lead anode slime treatment technology

Lead anode slime is a by product and an important secondary resource produced from the process of electrolytic refining of crude lead, whichcontainsvarious valuable metal elements. Hence its comprehensive recovery has been attracting more and more attention. In this paper, the research development in the pyrometallurgical, hydrometallurgical and pyrometallurgical-hydrometallurgical treatment processes of lead anode slime has been introduced in detail. In addition, vacuum treatment technology and direct preparation technology of pure material from lead anode slime were reported. According to the characteristics of bismuth-rich and arsenic-rich lead anode slime collected from a metallurgy enterprise in Yunnan province, a research programme of "pressure oxidation alkaline leaching-crude bismuth alloy casting-bismuth electrolysis" was presented by authors' research group. Based on the research programme, separation of arsenic, antimony and leadcan be realized, and meanwhile clean extraction of bismuth and the enrichment of gold and silver can be achieved. The research results show that the recovery rate of bismuth is over 98 %, antimony and lead over 96 %, gold and silver over 99 % and 97 % respectively. Finally, the gold content of 22 g/t and silver content of 3 595 g/t in lead anode slime are enriched to 201 g/t and 31 270 g/t in bismuth electrolysis anode slime.