在密闭鼓风炉熔炼过程中锗铟的富集及综合回收

在密闭鼓风炉炼铅锌过程中 ,锗和铟富集于真空炉渣中 ,铟富集于B塔底铅和粗铅中 .先采用氯化蒸馏从真空炉渣中回收锗 ,再从其残液中用TBP和P2 0 4 萃取回收铟 ,锗、铟的回收率分别高于 78%,83%;采用碱熔造渣捕集铟、水洗除碱、混酸浸出铟的工艺从B塔底铅中回收铟 ,回收率85 %;采用硫酸熟化浸出、铁屑置换除杂、P2 0 4 萃取富集的工艺从反射炉烟尘中回收铟 ,铟的回收率约 85 %.

Enrichment and comprehensive recovery of germanium and indium in smelting process of the closed blast furnace

During smelting lead and zinc in the closed blast furnace, germanium and indium were enriched in vacuum slag, and indium was also enriched in bottom lead from B column and rough lead.First germanium was recovered from the vacuum slag by the chlorinated distillation, and then its residual solution was extracted with TBP and P 204 to recover indium. The recoveries of Ge and In were over 78% and 83%, respectively. By the process of collecting In with alkali fusion to creat residue, removing alkaline with water wash and leaching indium with mixed acids, indium was recovered from bottom lead of B column and its recovery was 85%. By the process of leaching with sulphuric acid curing, removing impurities by replacement with iron filings and enrichment by P 204 extraction, indium was recovered from the smoke dust of reverberatory furnace and its recovery was about 85%.