Starting from the application of wet mineral grinding and fine, and to react with sulfuric acid, a compound ZnSO4 then adjust the solution to neutral with limestone or lime. Filter to separate the residue from the solution, but ZnSO4.Because the salt of metal, cadmium, antimony and copper alloy. Must get rid of these ions out by adding zinc down to sediment of cadmium, antimony and copper as the reaction
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