Relation of Mineralogy to Treatment Methods for Carbonaceous Gold Ores.
Soc Min Eng AIME Preprint 87-96 1987 :6 pages
The presence of organic materials in gold ores interferes with gold extraction by cyanidation. The carbon contained in the ore has been shown to adsorb gold cyanide complex from solution. Removal of the carbon content by roasting or chemical oxidation prior to cyanidation results in gold extractions of 85 to 95 pct. This paper by the Bureau of Mines, U.S. Department of the Interior, discusses how the mineralogy of the cabonaceous gold ores affects gold recovery by cyanidation. It also discusses the advantages and disadvantages of roasting and chemical treatment to render the ore amenable to cyanidation.
Soc. Min. Eng. AIME Preprint 87-96, 1987, 6 Pp