NOUFERROUS METALLURGICAL EQUIPMENT

In this paper, an electrochemical process and its supporting equipment for producing high purity gold are introduce. The whole process can be divided into electrochemical dissolution and electrochemical precipitation. By using special tank structure and ion permselective membrane, crude gold dissolution and precipitation of gold are done in two tanks, and ion permselective membrane can cut off the passing of [AuCl₄]-to enable the enrichment of Au[Ⅲ] in the anode chamber of the electrochemical dissolution tank. Upon completion of dissolution, the pregnant solution in the anode chamber of the electrochemical dissolution tank is transferred to the cathode chamber of the electrochemical precipitation tank for its precipitation on the cathode plate. Going through the process twice, crude gold can be processed into high purity gold that meets national standards. The whole process is an advanced technology with the advantages of less pollution and no electrolyte pressure comparing with electrolysis or chemical method. The whole set of equipment is simple to operate with automatic control, high reliability and safety.