METHOD OF PROCESSING NICKEL BEARING RAW MATERIAL

摘要

A hydrometallurgical method of processing nickel containing raw material is provided. The raw material is leached in chloride-based leaching media in a process integrated with chlorine-alkali electrolysis, solvent extraction and electrowinning process stages for producing metallic nickel. The solvent extraction stage comprises a nickel solvent extraction stage, where nickel is extracted from an aqueous solution containing high concentration of chloride. The electrolyte in the electrowinning stage is a sulphate containing aqueous liquid.