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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

  • Gold
  • Extractive metallurgy
  • Cyaniding(Beneficiation)
  • Leaching
  • Pyrite
  • Silver
  • Activated carbon
  • Carbon adsorption
  • Arsenopyrite
  • Bureau of Mines
  • 71N - Nonferrous Metals & Alloys
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