BASE METAL RECOVERY FROM A TAILINGS DUMP BY BACTERIAL OXIDATION

摘要

A method of recovering base metal from a tailings dump which includes the steps of: aerating a surface layer of the dump; adjusting the pH and the moisture content of the surface layer to provide conditions favourable for bacterial oxidation of sulphide minerals; allowing bacterial oxidation to ta ke place for a controlled period; after the controlled period removing the oxidised surface layer and adding water thereto to form a slurry; separating the slurry into solids and a solution; and recovering base metal from the solution.