ALKALINE OXIDATION PROCESS AND DEVICE FOR TREATING REFRACTORY SULFIDE ORE, IN PARTICULAR REFRACTORY GOLD ORE

摘要

Alkaline oxidation process for treating refractory sulfide ore or concentrate particles enriched in a metal to be recovered comprising stages in which refractory ore or concentrate particles are surface-oxidized in an alkaline oxidation step in alkaline liquid phase with calcium hydroxide forming an alkaline slurry, which slurry is thereafter mechanically activated to remove passivating coatings from the surface oxidized refractory ore particles.