METHOD FOR PRODUCING NICKEL AND COBALT Russian patent published in 2002 - IPC

FIELD: metallurgy, possibly production of nickel and cobalt from silicate ore leaching solutions. SUBSTANCE: method comprises deposition of matters out of solution of silicate ore leaching at changing pH of said solution. At first ferrum is deposited. Then ferrum-containing deposit is separated and washed out by means ammonia solution. Solution received after washing out is mixed with solution remained after separation of ferrum-containing deposit. Cobalt and nickel are deposited out of prepared mixture by adding to said mixture sodium sulfide or ammonium. EFFECT: enhanced degree of nickel and cobalt extraction; lowered cost of production process.