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http://dx.doi.org/10.7844/kirr.2016.25.5.36

Effects of Additives (Hydrogen Peroxide and Ethylene Glycol) and Temperature on the Leaching of Copper from Chalcopyrite by Sulfuric Acid Solution  

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)
Publication Information
Resources Recycling / v.25, no.5, 2016 , pp. 36-43 More about this Journal
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.
Keywords
chalcopyrite; copper leaching; sulfuric acid solution; hydrogen peroxide; ethylene glycol;
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Times Cited By KSCI : 2  (Citation Analysis)
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