论文部分内容阅读
最近美国矿业局研究了从复杂铅—锌硫化矿湿法回收金、银和副产品铅的方法。三氯化铁(FeCl_3)在40℃下预浸6小时。约提取50%的锌并生成银和铅的不溶氯化物,随后在40℃下硫脲酸性浸出1—3小时,约提取85%的金和银,再用55℃的Nacl盐水溶液从留下的浸出渣中溶解氯化铅。溶解1小时。然后通过阴离子选择性渗透膜从盐水溶液电解回收铅,电流效率95%,电流密度100安/米~2 FeCl_3废浸出浓在电流效率为75～95%之间的阳极室中重新氧化。
Recently, the U.S. Bureau of Mines investigated the wet recovery of lead, gold, silver and by-products from complex lead-zinc sulfide ores. Ferric chloride (FeCl 3) was pre-soaked for 6 hours at 40 ° C. Approximately 50% zinc is extracted and silver and lead insoluble chlorides are formed, followed by acidic thiourea leaching for 1 to 3 hours at 40 ° C, about 85% gold and silver extracted, and then 55 ° C Nacl saline solution to leave Leaching residue dissolves lead chloride. Dissolve for 1 hour. The lead was then electrolyzed from the brine solution through an anion-selective permeable membrane. The current efficiency was 95%, and the current density of 100 A / m ~ 2 FeCl_3 leached out of the anode chamber was re-oxidized in the current efficiency of 75-95%.