Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Effects of Additives (Hydrogen Peroxide and Ethylene Glycol) and Temperature on the Leaching of Copper from Chalcopyrite by Sulfuric Acid Solution

황산용액에 의한 황동광으로부터 구리 침출 시 첨가제(과산화수소와 에틸렌글리콜) 및 온도의 영향

  • Kim, So-Hyun (Department of Resource Recycling and Environmental Engineering, Jungwon University) ;
  • Ahn, Jong-Gwan (Department of Resource Recycling and Environmental Engineering, Jungwon University) ;
  • Shin, Shun-Myung (Korea Institute of Geoscience and Mineral Resources) ;
  • Chung, Kyeong-Woo (Korea Institute of Geoscience and Mineral Resources)
  • 김소현 (중원대학교 자원순환환경공학과) ;
  • 안종관 (중원대학교 자원순환환경공학과) ;
  • 신선명 (한국지질자원연구원) ;
  • 정경우 (한국지질자원연구원)
  • Received : 2016.06.27
  • Accepted : 2016.10.04
  • Published : 2016.10.31
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Abstract

The leaching behaviors of copper from chalcopyrite were investigated by sulfuric acid. The leaching of copper was examined according to concentration of sulfuric acid, leaching temperature and addition of hydrogen peroxide and ethylene glycol. The concentrations sulfuric acid and hydrogen peroxide in the leaching solution were increased, the leaching efficiencies of Cu were increased. At $30 -60^{\circ}C$, the leaching efficiency of Cu was increased but it was decreased at $70 - 80^{\circ}C$. The results were due to the increasing of hydrogen peroxide decomposition in the solution above $70^{\circ}C$. In the case of ethylene glycol added at $80^{\circ}C$, the decomposition of hydrogen peroxide was decreased and the leaching efficiency was increased. As a result of SEM analysis of leaching residue after leaching, the residue was found to porous form in the case of the ethylene glycol added and then the leaching efficiency of Cu was increased by the increase of surface area under $60^{\circ}C$ with ethylene glycol.

본 연구는 황동광의 황산침출에 관한 연구로 황산 농도, 침출온도, 첨가제로 과산화수소 및 에틸렌글리콜 첨가에 따른 구리 침출거동을 조사하였다. 침출용액에 과산화수소 및 황산의 농도가 증가할수록 구리 침출률이 증가하였다. 침출온도에 따른 구리 침출률은 $30 -60^{\circ}C$에서 상승하였으나, $70 -80^{\circ}C$에서는 감소하였다. 침출된 구리의 양이 감소하는 결과는 $70^{\circ}C$ 이상의 온도에서 용액 중에 함유된 과산화수소의 분해에 의한 것이었다. $80^{\circ}C$에서 에틸렌글리콜을 첨가하였을 경우 과산화수소의 분해가 억제되어 구리 침출률이 증가하였다. 침출 잔사의 SEM 분석 결과, 에틸렌글리콜을 첨가할 경우 침출 잔사가 다공성의 형태로 변형되는 것을 확인하였으며, 에틸렌글리콜 첨가 시 $60^{\circ}C$ 이하에서도 구리 침출률이 증가하였다.

Keywords

References

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