Potential-Controlled Electrolysis as an Effective Method of Selective Silver Electrowinning from Complex Matrix Leaching Solutions of Copper Concentrate

摘要

In a present paper the results of pure metallic silver electrochemical recovery from the solutionobtained by two-steps of chloride leaching process of Lubin, Poland copper flotation concentrate arediscussed. Potential-controlled electrolysis (PCEl) was used as a promising method of silverelectrochemical recovery from low concentration complex composition aqueous solutions. The studiedsolution contained approximately 50 mg/L of silver. The electroreduction of silver was studied usingcyclic voltammetry and chronoamperometry in two and three electrode configuration systems. Theeffect of several factors such as potential, time of electrolysis on selectivity of silver reduction wasstudied. Based upon conducted experiments the conditions of pure silver powders cathodicelectrodeposition using PCEl method were determined.