METHOD FOR REMOVING COPPER IONS FROM COPPER-CONTAINING NICKEL CHLORIDE SOLUTION, AND METHOD FOR PRODUCING ELECTROLYTIC NICKEL

摘要

PROBLEM TO BE SOLVED: To provide a method for removing copper ions from a copper-containing nickel chloride solution, which can remove copper contained in the copper-containing nickel chloride solution with high efficiency, and to provide a method for producing an electrolytic nickel.SOLUTION: The method for removing copper ions for removing copper ions from a copper-containing nickel chloride solution 11' produced by the chlorine leaching of a nickel sulfide 10 comprises: a first step of adding the nickel sulfide 10 to the copper-containing nickel chloride solution 11' containing bivalent copper ions to reduce at least the bivalent copper ions to monovalent copper ions; and a second step of adding a nickel matte 12 and a chlorine leaching residue 13 to a slurry produced through the first step to immobilize the monovalent copper ions contained in the slurry in the form of sulfides.