METHOD OF CADMIUM RECOVERY FROM ARSENIC-CONTAINING COPPER CADMIUM CAKE OF ZINC-ELECTROLYTIC PRODUCTION

摘要

Cadmium is recovered from a suspension of a CdSO4 solution containing as impurities Co, Ni, Cu, As, Sb, Pb and Zn salts, and a solid phase containing Cu, As or Sb. A reducing agent, e.g., metallic Zn is added to the solution to cementate all impurities but Pb, which is precipitated from the filtered solution by means of adding thereto Sr or Ba salts. Finally Cd is cemented, separated from the solution and smelt refined with alkali to remove Zn.