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最近,矿业局研究出一种从复杂铅-锌硫化物矿石中回收金银和副产品铅的湿法冶金方法。在40℃下,用FeCl_3预浸出6h,提取约50％的锌并生成不溶的银和铅氯化物,接着,在40~C下用酸化硫脲浸出1～3h,提取约85％的金和银;残渣中的PbC1_2,在55℃下用NaCl盐水溶液溶解1h,然后,在一个带有阴离子选择性渗透膜的电解槽中,从盐水溶液中回收铅。电解槽的电流密度为l00A/m_2,电流效率为95％。FeCl_3浸出液在电流效率为75～95％的阴极室中重新进行氧化。
Recently, the mining authority has developed a hydrometallurgical method for recovering gold, silver and by-product lead from complex lead-zinc sulfide ores. Pre-leaching with FeCl 3 at 40 ° C. for 6 h, extracting about 50% zinc and forming insoluble silver and lead chlorides followed by leaching with acidified thiourea at 40 ° C. for 1-3 h, extracting about 85% gold and Silver; Residue PbC1_2 was dissolved in NaCl brine for 1 h at 55 ° C. Lead was then recovered from the brine solution in an electrolyzer with an anion-selective permeable membrane. The cell current density of l00A / m_2, the current efficiency of 95%. The FeCl 3 leaching solution is oxidized again in a cathode chamber with a current efficiency of 75-95%.