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The silverSilver-catalyzed leachingLeaching of chalcopyriteChalcopyrite has been well studied and documented since Miller and Portillo (Silver catalysts in ferric sulfate leaching of chalcopyrite, pp. 691–736, 1979) published their initial findings regarding silverSilver assisting the kineticsKinetics of chalcopyriteChalcopyrite leachingLeaching via the formationFormation of a silverSilver sulfideSulfide intermediate. This study seeks to use scanning electron microscope-based energy-dispersive spectroscopy (SEMScanning Electronic Microscope (SEM)-EDS) and reflected light microscopy to investigate changing surface mineralogyMineralogy as a function of leachingLeaching time when silverSilver is present in raffinate. This involved selecting suitable mineralogyMineralogy for testing, quantifying, and documenting the changes in the sample surface mineralogyMineralogy pre/post-leachingLeaching and contrasting the effects of silverSilver verses baseline as a function of leachingLeaching time. The study found that silverSilver sulfideSulfide is present on the chalcopyriteChalcopyrite surface during leachingLeaching, assisting in the recoveryRecovery of copperCopper from the chalcopyriteChalcopyrite. In some cases, leachingLeaching with silverSilver was found to deplete the surface of copperCopper ions. This was shown by the apparent formationFormation of various copperCopper minerals on chalcopyriteChalcopyrite surfaces that optically resemble covellite, digenite, and/or borniteBornite. Inductively Coupled Plasma Optical EmissionEmissions Spectroscopy (ICP-OES) testing revealed that additional sulfurSulfur was oxidized to sulfateSulfate and was present in the leach solution at the end of the leachingLeaching period.

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Scanning Electron Microscopy and Reflected Light Microscopy to Investigate Chalcopyrite Leaching in the Presence of Silver

  • 会议论文

  • 发表日期：

    2025年

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  • Mitchell Catling,
  • Ortrud Schuh,
  • Alec Martin

摘要

The silverSilver-catalyzed leachingLeaching of chalcopyriteChalcopyrite has been well studied and documented since Miller and Portillo (Silver catalysts in ferric sulfate leaching of chalcopyrite, pp. 691–736, 1979) published their initial findings regarding silverSilver assisting the kineticsKinetics of chalcopyriteChalcopyrite leachingLeaching via the formationFormation of a silverSilver sulfideSulfide intermediate. This study seeks to use scanning electron microscope-based energy-dispersive spectroscopy (SEMScanning Electronic Microscope (SEM)-EDS) and reflected light microscopy to investigate changing surface mineralogyMineralogy as a function of leachingLeaching time when silverSilver is present in raffinate. This involved selecting suitable mineralogyMineralogy for testing, quantifying, and documenting the changes in the sample surface mineralogyMineralogy pre/post-leachingLeaching and contrasting the effects of silverSilver verses baseline as a function of leachingLeaching time. The study found that silverSilver sulfideSulfide is present on the chalcopyriteChalcopyrite surface during leachingLeaching, assisting in the recoveryRecovery of copperCopper from the chalcopyriteChalcopyrite. In some cases, leachingLeaching with silverSilver was found to deplete the surface of copperCopper ions. This was shown by the apparent formationFormation of various copperCopper minerals on chalcopyriteChalcopyrite surfaces that optically resemble covellite, digenite, and/or borniteBornite. Inductively Coupled Plasma Optical EmissionEmissions Spectroscopy (ICP-OES) testing revealed that additional sulfurSulfur was oxidized to sulfateSulfate and was present in the leach solution at the end of the leachingLeaching period.