Leaching Recovery of Zinc, Cobalt and Manganese from Zinc Purification Residue

This paper reports on the recovery of zinc, cobalt and manganese by two-step leaching of zinc-plants purification residue with sulfuric acid. The residue, hot filter press cake (HFC), contains ۱۴ % ZnO, ۴.۸ % Co۳O۴ and ۲۲.۹ % MnO. Effects of different parameters are determined and used to optimize the process. With acid to hot filter press cake (HFC) stoichiometry of ۰.۸۵, acid concentration of ۳۰ g/L and temperature of ۲۵ºC, it took two minutes to separate zinc from zinc plant residue. Hydrogen peroxide (H۲O۲) was used as an oxidation agent. The most suitable acid concentration for leaching of both cobalt and manganese was ۵۰ g/L. Recovery of cobalt and manganese increased with peroxide concentration in the leaching solution.

کلیدواژه ها:

Leaching ، Recovery ، Hydrometallurgy ، Zinc Plant Residue ، Filter Press Cake