美国矿务局研究出一项从复合硫化铅锌矿中回收金、银以及副产品铅的湿法冶金工艺。在40℃时,氯化铁(FeCl_3)预浸6小时,萃取出约50％的锌,并产生不溶解氯化银和氯化铅;再在40℃时,进行硫脲酸浸出1～3小时,萃取出约85%的金和银。氯化铅在55℃时,用氯化钠溶液从残渣中溶解1 The U.S. Bureau of Mines has developed a hydrometallurgical process for the recovery of lead, gold and by-product lead from a composite lead sulphide ore. At 40 ℃, ferric chloride (FeCl_3) was pre-soaked for 6 hours to extract about 50% zinc and produce insoluble silver chloride and lead chloride. Thiourea leaching was performed at 40 ° C for 1-3 hours Hour, extracted about 85% gold and silver. Lead chloride at 55 ℃, with sodium chloride solution from the residue dissolved in 1