Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Optimization of Gold Leaching from the Refractory Sulfide Concentrate by HCl-NaClO-FeCl3 Solution

HCl-NaClO-FeCl3 용액을 이용한 저항성 황화광물 정광으로부터 금 용출 최적화

  • Kim, Bong-Ju (Department of Energy and Resource Engineering, Chosun University) ;
  • Cho, Kang-Hee (Department of Energy and Resource Engineering, Chosun University) ;
  • Lee, Jong-Ju (Department of Energy and Resource Engineering, Chosun University) ;
  • Choi, Nag-Choul (Engineering Research Institute, Chonnam National University) ;
  • Park, Cheon-Young (Department of Energy and Resource Engineering, Chosun University)
  • 김봉주 (조선대학교 에너지자원공학과) ;
  • 조강희 (조선대학교 에너지자원공학과) ;
  • 이종주 (조선대학교 에너지자원공학과) ;
  • 최낙철 (전남대학교 공업기술연구소) ;
  • 박천영 (조선대학교 에너지자원공학과)
  • Received : 2012.09.25
  • Accepted : 2013.02.14
  • Published : 2013.02.28
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Abstract

In order to optimize gold leaching from refractory sulfide concentrate, a HCl-NaClO-$FeCl_3$ solution with varying attributes was applied to the roasted concentrate from Uil mine. The gold from Uil mine occurs in the form of invisible gold that is difficult to leach. The results of the gold leaching experiments showed that the best gold leaching parameters were $550^{\circ}C$ of roasting temperature, 2.0 M of concentration, 1.0% of pulp density, and $70^{\circ}C$ of leaching temperature. It is confirmed that the HCl-NaClO-$FeCl_3$ solution was an environmentally friendly method to leach gold and silver from the refractory sulfide concentrate as an alternative lixiviant to cyanide.

저항성 황화광물 정광으로부터 금 용출을 최적화시키기 위하여 HCl-NaClO-$FeCl_3$ 용액과 다양한 변수를 유일광산 소성정광에 적용하였다. 유일광산의 gold는 용출시키기 어려운 비가시성 gold로 산출되었다. 다양한 변수를 이용하여 용출실험을 수행한 결과, 소성온도 $550^{\circ}C$, 첨가량 2.0 M, 광액농도 1.0% 그리고 용출온도 $70^{\circ}C$에서 최대의 gold 용출율을 얻었다. HCl-NaClO-$FeCl_3$ 용액은 황화광물 정광으로부터 금과 은을 친환경적으로 용출시킬 수 있는 시안 대체 용매제 일 것으로 사료된다.

Keywords

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