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Received October 10, 2016
Accepted February 27, 2017
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Ultrasonic-assisted leaching kinetics in aqueous FeCl3-HCl solution for the recovery of copper by hydrometallurgy from poorly soluble chalcopyrite
Ho-Sung Yoon
Chul-Joo Kim
Kyung Woo Chung
Jin-Young Lee
Shun Myung Shin
Sung-Rae Kim1
Min-Ho Jang1
Jin-Ho Kim1
Se-Il Lee1
Seung-Joon Yoo1†
Korea Institute of Geoscience & Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea 1Department of Biomolecular and Chemical Engineering, Seonam University, 7-111 Pyeongchon-gil, Songak, Asan 31556, Korea
Korean Journal of Chemical Engineering, June 2017, 34(6), 1748-1755(8), 10.1007/s11814-017-0053-x
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Abstract
We studied the ultrasonic effect on the leaching of copper from poorly soluble chalcopyrite (CuFeS2) mineral in aqueous FeCl3 solution. The leaching experiment employed two methods, basic leaching and ultrasonic-assisted leaching, and was conducted under the optimized experimental conditions: a slurry density of 20 g/L in 0.1M FeCl3 reactant in a solution of 0.1M HCl, with an agitation speed of 500 rpm and in the temperature range of 50 to 99 °C. The maximum yield obtained from the optimized basic leaching was 77%, and ultrasonic-assisted leaching increased the maximum copper recovery to 87% under the same conditions of basic leaching. In terms of the leaching mechanism, the overall reaction rate of basic leaching is determined by the diffusion of both the product and ash layers based on a shrinking core model with a constant spherical particle; however, in the case of ultrasonic-assisted leaching, the leaching rate is determined by diffusion of the ash layer only by the removal of sulfur adsorbed on the surface of chalcopyrite mineral.
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References
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Aydogan S, Ucar G, Canbazoglu M, Hydrometallurgy, 81, 45 (2006)
Antonijevic MM, Jankovic ZD, Dimitrijevic MD, Hydrometallurgy, 71, 329 (2004)
Havlik T, Laubertova M, Miskufova A, Kondas J, Vranka F, Hydrometallurgy, 77, 51 (2005)
Guan YC, Han KN, Metall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci., 23B, 979 (1997)
Juanqin X, Xi L, Yewei D, Weibo M, Yujie W, Jingxian L, Chinese J. Chem. Eng., 18, 948 (2010)
Chen SG, Sanghai Nonferrous Metals, 3, 142 (2003)
Kar RN, Sulka LB, Swamy KM, Metall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci., 27, 351 (1996)
Pesic B, Zhou TL, Metall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci., 23B, 13 (1992)
Levenspiel O, Chemical Reaction Engineering, 3rd Ed., Wiley, NewYork (2003).
Schmidt LD, The Engineering of Chemical Reactions, 2nd Ed., Oxford University Press (2005).
Avrami M, J. Chem. Phys., 7, 1103 (1939)
Dickinson CF, Heal GR, Thermochim. Acta, 340, 89 (1999)
Orfao JJM, Martins FG, Thermochim. Acta, 390(1-2), 195 (2002)
Akinlua TN, Ajayi TR, Fuel, 87, 1469 (2008)
O’Malley ML, Liddell KC, Metall. Mater. Trans. B-Proc. Metall. Mater. Proc. Sci., 18B, 505 (1987)
Maurice D, Hawk JA, Hydrometallurgy, 51, 371 (1999)
