Process for recovery of gold and silver from complex pyrite and arsenopyrite ores and concentrates

摘要

A process for recovering gold and silver from complex ores of pyrite and arsenopyrite. The process involves the smelting of pyrite, obtaining molten pyrrhotite, contacting a layer of molten pyrrhotite containing a quantity of precious metals to be recovered with a layer of molten lead in the holding furnace (11) at a temperature where both layers exist as separate liquid phases, and obtaining the migration of the precious metals from the pyrrhotite to the molten lead. The enriched lead bath held in the holding furnace is discharged into a holding pot (18) where zinc is added. After removal of zinc, the molten lead is pumped to heating pot (17).