BENEFICIATION OF SULPHIDIC AND OXIDIC ORES

摘要

A process for beneficiating one or more mineral values of sulfide and oxide ores by treating the ore with a metal-containing compound under conditions such as to selectively enhance the magnetic susceptibility of the mineral values to the exclusion of the gangue in order to permit a separation between the values and gangue, and improvements comprising: pretreating the ore by heating it to a temperature of at least about 80`C for at least about 0.1 hours; removing any elemental sulfur present in the ore by preheating or solvent extraction prior to treating the ore with the metal-containing compound; cotreating the ore with a reducing gas while preheating, or while treating with the metal-containing compound.