Recycling of brass melting slag through the high-temperature oxidation-leaching process

Abstract Brass melting slag is a valuable secondary resource for the recovery of copper and zinc. The hydrometallurgical process this material challenge, because its limited dissolution in sulfuric acid. present study aimed at studying combined pyro-hydrometallurgical treatment processes involving high temperature oxidation acid leaching to industrial brass recover effect on performance efficiency was investigated by isothermal thermogravimetry. results revealed that increasing temperature, leachability improves due metallic particles. obtained showed 3 h as-received 900 °C, increased percent amount 2 M from 34 81%. pregnant leach solution containing sulfate zinc subjected electrowining as cathode. also recovered via evaporation crystallization process. Kinetic investigations 3D diffusion model has good agreement with results. In model, reaction controlled outward particle. activation energy 311 kJ mol ? 1 .