Recovery of iron from copper slag by deep reduction and magnetic beneficiation
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第11期
论文作者：Ke-qing Li Shuo Ping Hong-yu Wang Wen Ni
文章页码：1035 - 1041
摘 要：Aiming at recovering iron from high-iron-content copper slag,this article introduced a combination technology of deep reduction and magnetic benefciation,investigated the iron recovery efciency and optimized the technical conditions.When coke powder with 86wt%fxed carbon was used as a reductant,iron was successfully extracted from the copper slag.Under the optimized condition of the coke powder content of 14wt%,the calcium-to-silicon mass ratio（Ca/Si）of 0.2,the roasting temperature of 1300 C,the roasting time of 3 h,the grinding time of 20 min,and the magnetic feld intensity of 61 kA·m 1,the iron recovery rate of the copper slag can reach 91.82%,and the extracted iron powder has an iron grade of 96.21%.With the characteristics of high iron grade and low impurity content,the extracted iron powder can be used as high-quality raw materials of weathering steel.
Ke-qing Li1,2，Shuo Ping1，Hong-yu Wang1，Wen Ni1,2
1. Key Laboratory of the Ministry of Education of China for High-Efcient Mining and Safety of Metal Mines,University of Science and Technology Beijing2. School of Civil and Environmental Engineering,University of Science and Technology Beijing
摘 要：Aiming at recovering iron from high-iron-content copper slag,this article introduced a combination technology of deep reduction and magnetic benefciation,investigated the iron recovery efciency and optimized the technical conditions.When coke powder with 86wt%fxed carbon was used as a reductant,iron was successfully extracted from the copper slag.Under the optimized condition of the coke powder content of 14wt%,the calcium-to-silicon mass ratio（Ca/Si）of 0.2,the roasting temperature of 1300 C,the roasting time of 3 h,the grinding time of 20 min,and the magnetic feld intensity of 61 kA·m 1,the iron recovery rate of the copper slag can reach 91.82%,and the extracted iron powder has an iron grade of 96.21%.With the characteristics of high iron grade and low impurity content,the extracted iron powder can be used as high-quality raw materials of weathering steel.
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