Abstract
In this study, recovery of high grade nickel and cadmium products from the multi metal hazardous waste was carried by pyrometallurgical and hydrometallurgical process. Semi-finished products of nickel carbonate and cadmium carbonate were firstly treated from multi metal hazardous waste. Ni-CdO system could be achieved during carbonization in medium temperature reduction. After acid leaching, Cd2+ could be separated from nickel. Then the high grade nickel and CdCO3 products were obtained by smelting and precipitation respectively. The effects of the reducing agent, time, acidity, temperature were investigated. At the optimum conditions, recovery rate of nickel and cadmium is greater than 98%. This process is simple and don't require high temperature, pressure and special complex equipment.
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