TREATMENT METHOD OF NICKEL SULFIDE RAW MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a treatment method of a nickel sulfide raw material for easily and stably adjusting a raw material treatment ratio of a plurality of kinds of metal sulfide containing Ni in a wet smelting process including a chlorine leaching process for manufacturing Ni using a plurality of kinds of metal sulfide containing Ni as a raw material.SOLUTION: There is provided a treatment method of a nickel sulfide raw material in a wet smelting process for manufacturing Ni including a chlorine leaching process of obtaining a chlorine leachate from a Ni sulfide raw material containing metal sulfide, a substitution leaching process of substitution leaching Ni in the metal sulfide by Cuin a chlorine leachate and producing copper sulfide or the like to obtain a substitution leaching final liquid excluded copper and a cementation residual containing copper sulfide or the like, a cleaning process for obtaining Ni chloride liquid from the substitution leaching final liquid and an electrolysis process for recovering metal Ni and chlorine gas from the Ni chloride solution, where a treatment ratio of treated amount of mixture sulfide containing Ni sulfide and Co sulfide is increased by controlling a control reference value of a copper concentration in the chloride leaching liquid.SELECTED DRAWING: None