METHOD OF PROCESSION OF PULVERIZED WASTE; CONTAINING HEAVY NON-FERROUS METALS Russian patent published in 1996 - IPC

FIELD: raw material procession methods, providing recovering of non-ferrous metals or their compounds. SUBSTANCE: method comprises steps of leaching converter pulverized material by an ammonia solution, subsequent filtering of plumbum-containing deposit, processing a filtrate of soluble zinc-containing ammoniates by electric deposition of copper, cadmium and ferrum on aluminium electrodes for further filtering of these metals, had been deposited together with aluminium hydroxysulfate; distillation of zinc ammoniate by hot air, calcining sedimented zinc hydroxide for receiving dried zinc white; subjecting a deposit, had been received at electric deposition, to ammonization by secondary (after distillation) ammonia for separating aluminium to deposit; feeding deposited aluminium for further procession in order to receive coagulated aluminium by well known methods; subjecting a solution of copper, cadmium, ferrum ammoniates to secondary distillation by hot air with obtaining of copper, cadmium, ferrum hydroxides, to be processed as semifinished products in metallurgical production for obtaining copper and cadmium; returning ammonia, had been separated upon distillation, for reusing. EFFECT: enhanced efficiency of the method. 2 cl