METHOD FOR REMOVAL OF COPPER IONS FROM COPPER-CONTAINING NICKEL CHLORIDE SOLUTION, AND PROCESS FOR PRODUCTION OF ELECTROLYTIC NICKEL

摘要

A copper ion removing method for a copper containing nickel chloride solution, where the removal of copper contained in the copper containing nickel chloride solution can be accomplished efficiently, and an electro-nickel producing method are provided. The present invention relates to a copper ion removing method of removing copper ions from the copper containing nickel chloride solution (11') which has been produced by chlorine leaching of a nickel sulfide (10), comprising a first step of adding the copper containing nickel chloride solution (11'), which contains bivalent copper ions, with the nickel sulfide (10) for reduction of, at least, the bivalent copper ions to univalent copper ions, and a second step of adding a slurry produced by the first step with a nickel mat (12) and a chlorine leached residue (13) for solidification of the univalent copper ions in the slurry to form a sulfide.