Abstract
In order to reasonably utilize the iron resources of copper slags, the smelting chlorination process was used to remove copper from copper slags. Higher holding temperature and O2 flow rate are beneficial to increasing copper removal rate. However, the Cu2O mode is formed by the reaction of surplus O2 and CuCl with O2 flow rate increasing over 0.4 L/min, causing CuCl volatilization rate and copper removal rate to decrease. The resulting copper removal rate of 84.34% is obtained under the optimum conditions of holding temperature of 1573 K, residence time of 10 min, CaCl2 addition amount of 0.1 (mass ratio of CaCl2 and the copper slag) and oxygen flow rate of 0.4 L/min. The efficient removal of copper from copper slags through chlorination is feasible.
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Foundation item: Project(51204082) supported by the National Natural Science Foundation of China; Project(KKZ3201252011) supported by Talent Cultivation Project of Kunming University of Science and Technology, China
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Li, L., Wang, H. & Hu, Jh. Smelting chlorination method applied to removal of copper from copper slags. J. Cent. South Univ. 22, 59–65 (2015). https://doi.org/10.1007/s11771-015-2494-x
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DOI: https://doi.org/10.1007/s11771-015-2494-x