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Recovery of Silver and Mercury From Mill Tailings by Electrooxidation.


PB211946

Publication Date 1972
Personal Author Scheiner, B. J.; Pool, D. L.; Lindstrom, R. E.
Page Count 16
Abstract Extraction of silver from silver mill tailings by an electrolytic oxidation procedure was investigated. Various parameters affecting silver extraction, such as electrolysis time, particle size, and dissolution of the silver as the tetrachloro or cyanide complex, were studied at 30C with an electrolyte concentration of 20 weight-percent sodium chloride. Resulting silver extractions ranged from 77 to 90 percent, depending on the tailings being treated. Concomitant extraction of mercury ranged between 90 and 95 percent. Power consumption was 52 to 90 kilowatt hours per ton for the tailings investigated. Comparative experiments using direct cyanidation resulted in extraction of 46 to 82 percent of the silver and 20 percent of the mercury. Cyanide consumption varied from 3.3 to 9.4 pounds per ton of tailings, depending on the tailings being treated. Silver and mercury were recovered from leach solutions by precipitation on iron powder, followed by conventional distillation and fire refining steps. (Author)
Keywords
  • Silver
  • Electrowinning
  • Mercury
  • Tailings
  • Materials recovery
  • Hydrometallurgy
  • Leaching
  • Oxidation
  • Hypochlorites
  • Chlorides
  • Cinnabar
  • Cyanides
  • Electrooxidation
Source Agency
  • Invalid Source Agency Code
NTIS Subject Category
  • 71J - Iron & Iron Alloys
Corporate Authors BUREAU OF Mines, Washington, D.C.
Supplemental Notes Prepared in cooperation with Reno Metallurgy Research Center, Nev.
Document Type Technical Report
Title Note Rept. of Investigations.
NTIS Issue Number 197221
Recovery of Silver and Mercury From Mill Tailings by Electrooxidation.
Recovery of Silver and Mercury From Mill Tailings by Electrooxidation.
PB211946

  • Silver
  • Electrowinning
  • Mercury
  • Tailings
  • Materials recovery
  • Hydrometallurgy
  • Leaching
  • Oxidation
  • Hypochlorites
  • Chlorides
  • Cinnabar
  • Cyanides
  • Electrooxidation
  • Invalid Source Agency Code
  • 71J - Iron & Iron Alloys
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