PROCEDURE FOR PROCESSING OXIDISED NICKEL-, COBALT-, IRON-, AND MAGNESIUM-CONTAINING ORE Russian patent published in 2010 - IPC C22B23/00 C22B3/06 

FIELD: metallurgy.

SUBSTANCE: procedure consists in crushing and screening ore lumps with separation into small and big fractions. Further there is performed separate said fractions of ore pelleting with solutions of acid; thus there are formed independent objects out of pellets of the said fractions of ore. Nickel, cobalt and associated metals leaching out of an object of pellets of small fraction ore is performed with solution of acid of source concentration not less, than 0.25 moles/dm³; thus mother solution is produced. Nickel, cobalt and associated metals leaching out of an object of pellets of big fraction ore is performed with acidulous said mother solution till producing solution containing salts of nickel, cobalt, iron and magnesium is obtained. Further producing solution is neutralised to the value of pH=1-3, and nickel and cobalt are ion-change selectively sorbed out of producing solution. Produced raffinate contains water soluble salts of iron and magnesium. Upon sorption of nickel and cobalt one part of the said raffinate is recycled to ore leaching; while the other part of raffinate is withdrawn to utilisation.

EFFECT: facilitating high degree of nickel and cobalt extraction and high rate of acid solution infiltration.

13 cl, 1 dwg, 4 tbl