PROCESS FOR THE EXTRACTION OF GOLD AND SILVER D PROCEDURE FOR EXTRACTING GOLD AND SILVER OF COMPLETED CONCENTRATES AND OREISSULFUROES AND COMPLETED SULFUROUS CONCENTRATES AND ORES

摘要

The present invention relates to a process for the separation of gold and silver from complex sulfide ores and concentrates which, in addition to the primary metals, contain constituents having an adverse effect on the separation of the noble metals, by heating the sulfide ore or concentrate at a temperature of 600 DEG -900 DEG C. and a sulfur pressure of 0.2-1 atm in order to bring the complex metal compounds to a suitable form for subsequent alkalic cyanide leaching, and by separating the gold- and silver-bearing cyanide solution from the undissolved residue.