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Econ. Environ. Geol. 2013; 46(6): 477-484

Published online December 31, 2013

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

The Possibility of Gold Recovery from the Iron-Hydroxide in the Acid Mine Drainage by Lead-Fire Assay

Kang-Hee Cho1, Bong-Ju Kim1, Jin-Hyung Kim2, Nag-Choul Choi3 and Cheon-Young Park1*

1Department of Energy and Resource Engineering, Chosun University, Gwang-ju, Korea
2GOLDEN SUN, Jeollanam-do, Korea
3Department of Rural Systems Engineering/Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Korea

Correspondence to : cybpark@chosun.ac.kr

Received: July 29, 2013; Revised: October 8, 2013; Accepted: December 9, 2013

Abstract

In order to recover gold from iron-hydroxide in acid mine drainage, a lead-fire assay has been used. Acid mine drainage is generated from mining waste rocks, and iron-hydroxide precipitates from acid mine drainage, which severely contaminates the area surrounding the mine. Iron-hydroxide samples contain on average 520.29 mg/kg of Fe, 4,414.62 mg/kg sulfur, and 16.19 mg/kg Au. In an XRD analysis, quartz and goethite were observed along with the iron-hydroxide. Using a lead-fire assay, the recovery of pure gold was on average 0.174 g/ton from the ironhydroxide, whereas the gold not recovered in the process was on average 1.37 mg/kg. This unrecovered gold was lost to the glass slag due to the galena and lead formation. The galena and lead in the glass slag was identified through XRD.

Keywords mining waste rocks, acid mine drainage, iron-hydroxide, lead-fire assay, gold recovery

Article

Econ. Environ. Geol. 2013; 46(6): 477-484

Published online December 31, 2013

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

The Possibility of Gold Recovery from the Iron-Hydroxide in the Acid Mine Drainage by Lead-Fire Assay

Kang-Hee Cho1, Bong-Ju Kim1, Jin-Hyung Kim2, Nag-Choul Choi3 and Cheon-Young Park1*

1Department of Energy and Resource Engineering, Chosun University, Gwang-ju, Korea
2GOLDEN SUN, Jeollanam-do, Korea
3Department of Rural Systems Engineering/Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Korea

Correspondence to:cybpark@chosun.ac.kr

Received: July 29, 2013; Revised: October 8, 2013; Accepted: December 9, 2013

Abstract

In order to recover gold from iron-hydroxide in acid mine drainage, a lead-fire assay has been used. Acid mine drainage is generated from mining waste rocks, and iron-hydroxide precipitates from acid mine drainage, which severely contaminates the area surrounding the mine. Iron-hydroxide samples contain on average 520.29 mg/kg of Fe, 4,414.62 mg/kg sulfur, and 16.19 mg/kg Au. In an XRD analysis, quartz and goethite were observed along with the iron-hydroxide. Using a lead-fire assay, the recovery of pure gold was on average 0.174 g/ton from the ironhydroxide, whereas the gold not recovered in the process was on average 1.37 mg/kg. This unrecovered gold was lost to the glass slag due to the galena and lead formation. The galena and lead in the glass slag was identified through XRD.

Keywords mining waste rocks, acid mine drainage, iron-hydroxide, lead-fire assay, gold recovery

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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