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In recent years, in order to improve the recovery of precious metals, improve the operating environment, eliminate pollution, at home and abroad in addition to conventional electrolysis process and equipment Fire out-transform and improve, also studied a number of new treatment methods, and some have been put into operation .
At present, large-scale factories at home and abroad still use the fire process. Foreign countries are developing in the direction of large-scale centralized processing. For example: U.S. 2,000,000 annual copper t, 30 have copper factory, while only five anode slime treatment. Medium and small smelters are developing the wet process. The research goal of the new process is to strengthen the process, shorten the production cycle, reduce lead pollution, and improve overall economic benefits.