Recovery of iron from copper slag by deep reduction and magnetic beneficiation
Source abstract
Abstract
Aiming at recovering iron from high-iron-content copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation, investigated the iron recovery efficiency and optimized the technical conditions. When coke powder with 86wt% fixed 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 field 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.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · Iron and Steelmaking Processes · Metal Extraction and Bioleaching
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (17)
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1. Y.F. Ren and Y.F. Yu, Present status and development orientation of magnetization roasting technology for refractory red iron ores, Met. Mine, 2005, No. 11, p. 20.
2. H. Alter, The composition and environmental hazard of copper slags in the context of the Basel convention, Resour. Conserv. Recycl., 43(2005), No. 4, p. 353.10.1016/j.resconrec.2004.05.005 ↗
3. D. Busolic, F. Parada, R. Parra, M. Sanchez, J. Palacios, and M. Hino, Recovery of iron from copper flash smelting slags, Trans. Inst. Min. Metall. Sect. C, 120(2011), No. 1, p. 32.
4. H.Y. Cao, N.X. Fu, C.G. Wang, L. Zhang, F.S. Xia, Z.T. Sui, and N.X. Feng, Selective precipitation and separation of Fe components from copper smelting slags, Multipurpose Util. Miner. Resour., 2009, No. 2, p. 8.
5. B. Gorai, R.K. Jana, and Premchand, Characteristics and utilisation of copper slag: a review, Resour. Conserv. Recycl., 39(2003), No. 4, p. 299.10.1016/S0921-3449(02)00171-4 ↗
6. A. Agrawal, K.L. Sahoo, S. Ghosh, and B.D. Pandey, Recovering iron from copper slag, Foundry Manage. Technol., 130(2002), No. 10, p. 16.
7. J. Palacios and M. Sánchez, Wastes as resources: update on recovery of valuable metals from copper slags, Miner. Process. Extr. Metall., 120(2011), No. 4, p. 218.10.1179/1743285511Y.0000000020 ↗
8. R.G. Reddy, V.L. Prabhu, and D. Mantha, Recovery of valuable metals from copper blast furnace slag, Miner. Metall. Process., 21(2004), No. 3, p.125.
9. Y.L. Liao, X.J. Chai, J.T. Li, and D.B. Li, Study on recovering iron from smelting slag by carbothermic reduction, Adv. Mater. Res., 382(2012), p. 422.10.4028/www.scientific.net/AMR.382.422 ↗
10. B.Q. Sun, Progress in China’s beneficiation technology for complex refractory iron ore, Met. Mine, 2006, No. 3, p. 11.
11. M. Bahgat and M.H. Khedr, Reduction kinetics, magnetic behavior and morphological changes during reduction of magnetite single crystal, Mater. Sci. Eng. B, 138(2007), No. 3, p. 251.10.1016/j.mseb.2007.01.029 ↗
12. C. Feilmayr, A. Thurnhofer, and F. Winrer, Reduction behavior of hematite to magnetite under fluidized bed conditions, ISIJ Int., 44(2004), No. 7, p. 1125.10.2355/isijinternational.44.1125 ↗
13. S. Mostaghel, C. Samuelsson, and B. Björkman, Influence of alumina on mineralogy and environmental properties of zinc-copper smelting slags, Int. J. Miner. Met. Mater., 20(2013), No. 3, p. 234.10.1007/s12613-013-0718-3 ↗
14. C.Y. Xu, T.C. Sun, C.Y. Qi, Y.L. Li, X.L. Mo, X.M. Qin, Z. Wang, and Z.X. Li, Effects of reductants on iron reduction in the direct reduction process of high-phosphorus oolitic hematite, J. Univ. Sci. Technol. Beijing, 33(2011), No. 8, p. 905.
15. J.C. Zhou, Z.L. Xue, Z.Q. Li, and H.F. Zhang, Characteristics of grain growth of metallic phase in direct reduction of high phosphorus oolitic hematite, J. Wuhan Univ. Sci. Technol., 30(2007), No. 5, p. 458.
16. J. Matousek, Thermodynamics of iron oxidation in metallurgical slags, JOM, 64(2012), No. 11, p. 1314.10.1007/s11837-012-0461-7 ↗
17. X.H. Huang, Iron and Steel Metallurgy Principles, Metallurgical Industry Press, Beijing, 2005, p. 134.