FIELD: mining engineering. SUBSTANCE: method involves forming antifiltration and drainage layers, tail layer to be concentrated with high contents of cobalt and nickel mixed with precipitating minerals like smaltite and leachable layer with cobalt and nickel contents with minerals intensifying their electrochemical dissolving like pyrite and galenite. In treating tailing mass with solutions, electrochemical dissolving of metals from leachable layer, migration of metal-carrying solutions and their precipitation in the concentrated layer takes place. EFFECT: enhanced effectiveness in storing sulfoarsenide ores. 2 cl, 1 dwg
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