Abstract
A new method of electrochemical sulfidization of oxidized complex (refractory) copper ores was developed. Elemental sulfur was used as a sulfidizing agent to increase the dressing rates. Using the Seidel-Gauss method, the effect of the current density, the concentration of sulfuric acid, the sulfidizing agent, sulfur, the electrolyte temperature, the electrolysis duration on the degree of copper extraction into the flotation concentrate was studied. A mathematical model for the copper recovery into the concentrate was obtained and a nomogram was calculated. It follows that under electrolysis conditions at the optimal concentration of the sulfidizing agent, elemental sulfur, sulfuric acid, the current density, the electrolyte temperature, the electrolysis duration, the degree of copper extraction into the flotation concentrate reaches its maximum value ≥ 95.0%.