smelting chlorination method applied to removal of copper from copper slags
来源期刊：中南大学学报(英文版)2015年第1期
论文作者：李磊 WANG Hua(王华) HU Jian-hang(胡建杭)
文章页码：59 - 65
Key words：copper slags; smelting chlorination; copper removal; volatilization; waste utilization
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.
LI Lei(李磊), WANG Hua(王华), HU Jian-hang(胡建杭)
(State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,
Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction of Ministry of Education (Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology),
Kunming 650093, China)
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.
Key words:copper slags; smelting chlorination; copper removal; volatilization; waste utilization
