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Processing Gold Ores Using Heap Leach-Carbon Adsorption Methods.

PB280177

Publication Date	1978
Personal Author	Heinen, H. J.; Peterson, D. G.; Lindstrom, R. E.
Page Count	26
Abstract	Recent developments in the heap leaching of gold ores with dilute cyanide solution and the recovery of gold and associated silver from the pregnant effluents by a carbon adsorption-desorption method are reviewed. This paper describes mineralogical considerations, experimental work, field studies, and commercial operations. Also included are recent process advances developed by the Federal Bureau of Mines. They include the application of (1) alcohol additives to the conventional hot alkaline cyanide strip solution to enhance gold desorption from precious metal-laden activated carbon, and (2) Na2S precipitation of the silver from gold-silver cyanide solutions as a means of reducing the inventory of carbon required for precious metal adsorption from heap leach effluents and for the production of low-silver bullion from activated carbon stripping solutions.
Keywords	Gold Adsorption Activated carbon Leaching Cyaniding(Beneficiation) Extractive metallurgy Hydrometallurgy Silver Additives Alcohols Sodium inorganic compounds Inorganic sulfides Sodium sulfides
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 71N - Nonferrous Metals & Alloys
Corporate Authors	Bureau of Mines, Reno, Nev. Reno Metallurgy Research Center.
Document Type	Technical Report
Title Note	Information circular.
NTIS Issue Number	197816

Processing Gold Ores Using Heap Leach-Carbon Adsorption Methods.

Processing Gold Ores Using Heap Leach-Carbon Adsorption Methods.
PB280177

Publication Date	1978
Personal Author	Heinen, H. J.; Peterson, D. G.; Lindstrom, R. E.
Page Count	26
Abstract	Recent developments in the heap leaching of gold ores with dilute cyanide solution and the recovery of gold and associated silver from the pregnant effluents by a carbon adsorption-desorption method are reviewed. This paper describes mineralogical considerations, experimental work, field studies, and commercial operations. Also included are recent process advances developed by the Federal Bureau of Mines. They include the application of (1) alcohol additives to the conventional hot alkaline cyanide strip solution to enhance gold desorption from precious metal-laden activated carbon, and (2) Na2S precipitation of the silver from gold-silver cyanide solutions as a means of reducing the inventory of carbon required for precious metal adsorption from heap leach effluents and for the production of low-silver bullion from activated carbon stripping solutions.
Keywords	Gold Adsorption Activated carbon Leaching Cyaniding(Beneficiation) Extractive metallurgy Hydrometallurgy Silver Additives Alcohols Sodium inorganic compounds Inorganic sulfides Sodium sulfides
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 71N - Nonferrous Metals & Alloys
Corporate Authors	Bureau of Mines, Reno, Nev. Reno Metallurgy Research Center.
Document Type	Technical Report
Title Note	Information circular.
NTIS Issue Number	197816