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Recovery of Gold from Arsenopyrite Concentrates by Cyanidation-Carbon Adsorption.

PB81150013

Publication Date	1980
Personal Author	Heinen, H. J.; McClelland, G. E.; Lindstrom, R. E.
Page Count	16
Abstract	The Bureau of Mines investigated a cyanidation-carbon adsorption technique for extracting gold from arsenopyrite concentrates. Agitation leach experiments were conducted on 85-pct-minus-35-mesh gravity concentrates containing 21.8 oz gold and 6.4 oz silver per ton. Results obtained in leaching the concentrates showed that 96.9 pct gold and 90.7 pct silver extraction could be achieved in 96 hours of agitation. Gold and silver were recovered from the resulting pregnant solution by exposure to granular activated carbon in a countercurrent system. Carbon loadings of 2,556 oz of gold and 502 oz of silver per ton were achieved. These loadings are significantly higher than heretofore thought practical.
Keywords	Gold Extractive metallurgy Cyaniding(Beneficiation) Leaching Pyrite Silver Activated carbon Carbon adsorption Arsenopyrite
Source Agency	Bureau of Mines
NTIS Subject Category	71N - Nonferrous Metals & Alloys
Corporate Authors	Bureau of Mines, Reno, NV. Reno Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations/1980.
NTIS Issue Number	198111

Recovery of Gold from Arsenopyrite Concentrates by Cyanidation-Carbon Adsorption.

Recovery of Gold from Arsenopyrite Concentrates by Cyanidation-Carbon Adsorption.
PB81150013

Publication Date	1980
Personal Author	Heinen, H. J.; McClelland, G. E.; Lindstrom, R. E.
Page Count	16
Abstract	The Bureau of Mines investigated a cyanidation-carbon adsorption technique for extracting gold from arsenopyrite concentrates. Agitation leach experiments were conducted on 85-pct-minus-35-mesh gravity concentrates containing 21.8 oz gold and 6.4 oz silver per ton. Results obtained in leaching the concentrates showed that 96.9 pct gold and 90.7 pct silver extraction could be achieved in 96 hours of agitation. Gold and silver were recovered from the resulting pregnant solution by exposure to granular activated carbon in a countercurrent system. Carbon loadings of 2,556 oz of gold and 502 oz of silver per ton were achieved. These loadings are significantly higher than heretofore thought practical.
Keywords	Gold Extractive metallurgy Cyaniding(Beneficiation) Leaching Pyrite Silver Activated carbon Carbon adsorption Arsenopyrite
Source Agency	Bureau of Mines
NTIS Subject Category	71N - Nonferrous Metals & Alloys
Corporate Authors	Bureau of Mines, Reno, NV. Reno Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations/1980.
NTIS Issue Number	198111