Förfarande för hydrometallurgisk behandling av ett sulfidiskt material som innehåller zink och koppar

摘要

The invention relates to a method for recovering the valuable metals from sulphidic raw material containing at least copper and zinc by means of hydrometallurgical treatment. Copper sulphide and zinc sulphide are components of the raw material, and are leached by means of an alkali chloride- copper (II) chloride solution. The divalent copper chloride is removed from the solution that is formed, and the solution is routed to zinc extraction to remove the zinc from the alkali chloride-copper chloride solution. The solution exiting zinc extraction, which is depleted with regard to zinc, is routed to final solution purification and copper recovery. The reagents required in the process are obtained primarily as products of the chlorine-alkali electrolysis that is related to the process.