A combined electrolytic system for precipitating metals of interest and to regenerate oxidising agents used in the leaching of metals, scrap metals, metal sulphurs, sulphide minerals and raw materials containing metals from solutions from leaching that allows precipitation and oxidation in a single step, wherein the system comprises:
- a membrane cell device comprised of a cathode compartment and an anode compartment with a respective cathode and anode, wherein the cathode compartment is separated from the anode compartment by a selective and unidirectional ion exchange membrane;
- a rich solution flow line coming from said metal leaching, connected to a cathodic solution feed tank;
- a rich solution entry flow line from the cathodic solution feed tank to the cathode compartment for electrolytically precipitating therein the metal of interest as cathode metal;
- a cathodic solution exit flow line from the cathode compartment to a distribution valve;
- a cathodic solution exit flow line from said valve to an anodic solution feed tank;
- a cathodic solution recirculation flow line from said valve back to the cathodic solution feed tank;
- an anodic solution entry flow line from the anodic solution feed tank to the anode compartment;
- an anodic solution exit flow line from the anode compartment to a product solution tank of oxidising agents;
- an oxidising agent replenishment flow line from the product solution tank of oxidising agents to the anodic solution feed tank;
- an oxidising agent exit flow ne from the product solution tank of oxidising agents to a conveying valve;
- and
- a flow line from said conveying valve to an oxidising leaching process which provides said rich solution from leaching.