SOLVENT EXTRACTION OF GOLD FROM CHLORIDE COPPER ANODE SLIME LIQUORS

摘要

A phosphine sulphide and two phosphine oxide type reagents were tested for the recovery of gold from liquors derived by the oxidative chloride leaching of copper anode slimes. The phosphine sulphide reagent Cyanex 471X was found to be very selective for gold with respect to impurities such as Se, Te, Bi, Pb and Cu. Using this reagent, an upgrading of Au concentration from 7% in the feed liquor to 99.9% in the loaded solvent was achieved.