Deportment of gold in an autoclave pressure oxidation (AC-POX))/carbon in leach (CIL) residue - Surface Science Western

Request for analysis: A carbonaceous refractory sulphide ore is processed in an autoclave pressure oxidation plant and subsequently subjected to a cyanide leaching. An initial mineralogical study of the feed ore by quantitative dynamic SIMS analysis has shown that 95% of the gold is contained as sub-microscopic gold in pyrite with the remainder contained in primary Fe-oxide minerals. In addition, the feed ore contains a substantial fraction of carbonaceous material. The gold recovery is low and.