PROCESS FOR THE RECOVERY OF GOLD OF MATERIAL CONTAINING SULFURET, AURIFERO, REFRACTORY, CONTAINING IRON

摘要

In a process for the recovery of gold from refractory auriferous iron containing sulphidic material which comprises subjecting an aqueous feed slurry of the sulphidic material to a pressure oxidation step (14), and recovering the gold from the oxidized solids, e.g. by cyanidation (22), problems associated with elemental sulphur formation in the oxidation step are alleviated by adding inert mateial, preferably by recycle of oxidized solids, to the feed slurry to provide an initial pulp density in the range 30-60% by weight.