硫化物沉淀法选择性分离碱性锌溶液中的铅  

Selective Separation of Lead From Alkaline Zinc Solution bySulfide Precipitation

作　　者：祝优珍[1] 赵由才[2] 

机构地区：[1]上海应用技术学院化学工程系,上海200235 [2]同济大学污染控制与资源化研究国家实验室,上海200092

出　　处：《上海应用技术学院学报（自然科学版）》2001年第1期59-63,共5页Journal of Shanghai Institute of Technology: Natural Science

摘　　要：锌和铅常共存于锌铅矿石和固体废物如电弧高炉粉尘中。一种处理方法是用碱性浸出液来提取矿石或废弃物中的锌和铅。在这过程中将铅选择性地定量地与锌分离是一重要步聚。研究在碱性含锌(电弧高炉粉尘和氧化锌矿)浸出液中用硫化钠沉淀法分离铅。当硫化钠(平均分子量为222)加到碱溶液中的重量比为1.8 -2.0(摩尔比为1.5 -1.7)时 ,铅能选择性地定量地分离 ,而锌仍无损失地留在溶液中。In this work, the separation of lead from zinc in alkaline zinc solution as well as leaching solutions of EAF dusts and oxidised zinc ores by sodium sulfide precipitation was studied. It was found that when the weight ratio of sodium sulfide (average molecular weight 222) added to the lead present in alkaline solution is over 1.8～2.0 (molar ratio around 1.5～1.7), lead can be separated selectively and quantitatively, while the zinc remains in the solution without concomitant loss.

关 键 词：铅锌矿 碱性浸出 选择性分离 硫化钠 摩尔比 

分 类 号：TQ028[化学工程]