METHOD OF CHLORINE LEACHING OF NICKEL/COBALT-CONTAINING MIXED SULFIDE

摘要

PROBLEM TO BE SOLVED: To provide a practical and efficient method of chlorine leaching for recovering nickel and cobalt from a nickel/cobalt-containing mixed sulfide obtained by wet sulfuration reaction at a high leaching ratio of≥95%.

SOLUTION: The method of chlorine leaching of nickel/cobalt-containing mixed sulfide obtained by wet sulfuration reaction is characterized in that the powder properties of the mixed sulfide used for raw materials are preadjusted, and controlled so that the specific surface area reaches≥1.50 m2/g or the specific surface area (F) per unit particle diameter satisfies inequality; F=a/d≥0.05 m2/g/μm, and thereafter nickel and cobalt are recovered by chlorine leaching treatment at a leaching ratio of≥95; wherein, a denotes the specific surface area (m2/g) of the mixed sulfide; and d denotes the 50% diameter (μm) of a particle diameter distribution.

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