Fig. 1. XRD patterns and SEM-EDS results of the particle of the copper slag before the reduction reaction.
Fig. 2. Results of desulfurization roasting depending on temperature and time.
Fig. 3. Melting behavior of slag according to reaction temperature. (a) 1300 ℃, (b) 1400 ℃, (c) 1500 ℃, (d) 1600 ℃
Fig. 4. The content of Fe2O3 in the slag according to the reaction time condition
Table 1. Chemical composition of the copper slag used in this study (XRF)
Table 2. Chemical composition of the copper slag used in this study (SEM-EDS)
Table 3. Effect of calculation method of CaO addition
Table 4. Results of desulfurization roasting depending on temperature and time
Table 5. Result of desulfurization by oxygen partial pressure
Table 6. Effect of calculation method of CaO addition
Table 7. Chemical composition of pig iron separated by high temperature reduction melting from copper smelting slag according to reaction temperature condition
Table 8. Chemical composition of slag separated by high temperature reduction melting from copper smelting slag according to reaction temperature condition
Table 9. The components of the pig iron recovered after the high-temperature reduction melting at the reaction time condition of 30 minutes (SEM-EDS)
Table 10. The components of the slag recovered after the high-temperature reduction melting at a reaction time of 30 minutes (SEM-EDS)
Table 11. Chemical composition of slag separated by high temperature reduction melting from copper smelting slag with reaction time condition change (XRF)
References
- Ju-Seong Bae, Nam-Wook Kim, and Sang-Hun Ko, 2007 : A Study on the Properties of Concrete Substituting Copper Slag for Fine Aggregate, Journal of the Korea Institute for Structural Maintenance Inspection 11, pp.151-158.
- Kwang-Seok Lee, Seul-Ki Jo, Doyun Shin, Soo-Bock Jeong, Jae-chun Lee, and Byung-Su Kim, 2014 : Upgrading of Iron from Waste Copper Slag by A Physicochemical Separation Process, J. of Korean Inst. of Resources Recycling, 23, pp.30-36.
- Korea Zinc Co., Ltd., 2012 : Private Communication
- LS-Nikko copper inc., 2012 : Private Communication
- S. W. Ji and C. H. Seo, 2006 : The application of copper smelting slag as concrete aggregate, J. of the Korean Recycled Construction Resources Institute 2, 68.
- Huiting Shen and E. Forssberg, 2003 : An overview of recovery of metals from slag, Waste Managment, 23, pp.933-949. https://doi.org/10.1016/S0956-053X(02)00164-2
- Norrgran, D. and Wernham, J., 1991 : Recycling and secondary recovery applications using an eddy-current separator", Miner. Metall. Process. 11, pp.184-187.
- Young-Hwan Kim and Jung-Min Yoo, 2016 : A Study on the Reduction of Iron Oxide from Slag in the EAF Process, J. of Korean Inst. of Resources Recycling, 25, pp.54-59. https://doi.org/10.7844/kirr.2016.25.4.54
- Yucel, O., Addemir, O., Tekin, A., and Nizamoglu, S., 1992 : Recovery of cobalt from copper slags, Miner. Process. Extr. Metall. Rev. 10(1), pp.93-99.
- Agrawal, A., Sahoo, K.L., Ghosh, S., Pandey, B.D., 2007: United states patent 2007/0283785 A1.
- Yucel, O., Sahin, F., Sirin, B., and Addemir, O., 1999 : A reduction study of copper slag in DC arc furnace, Scand. J. Metall. 28(3), pp.93-99.
- Ke-qing Li, Shuo Ping, Hong-yu Wang, and Wen Ni, 2013 : Recovery of iron from copper slag by deep reduction and magnetic beneficiation, International Journal of Minerals, Metallurgy, and Materials, Volume 20, Issue 11, pp.1035-1041. https://doi.org/10.1007/s12613-013-0831-3
- Banza, A., Gock, E., and Kongolo, K., 2002 : Base metals recovery from copper smelter slag by oxidizing leaching and solvent extraction, Hydrometallurgy, 67, pp.63-69, (2002). https://doi.org/10.1016/S0304-386X(02)00138-X
- Veasey, T., 1997 : An overview of metals recycling by phisical separation methods, Proc. Inst. Mech. Eng. E J. Process Mech. Eng. 211(1), pp.61-64. https://doi.org/10.1243/0954408971529557
- Hino, M., 2011 : Recovery of iron from copper flash smelting slags. Miner. Process, Extr. Metall. (Trans. Inst. Min. Metall. C) 120(1), pp.32-36. https://doi.org/10.1179/037195510X12772935654945
- Gyurov, S., Kostova, Y., Klitcheva, G., and Ilinkina, A., 2011 : Themal decomposition of pyro-metallurgical copper slag by oxidation in synthetic air, Waste Manag. Res. 29(2), pp.157-164. https://doi.org/10.1177/0734242X10379495
- Takashi Noda, Kohei Taniguchi, and Masaru Fukuda, 2011 : Development and Utility of High Purity Pig Iron on Foundry Material, Journal of Korea Foundry Society, 31(4), pp.175-179. https://doi.org/10.7777/jkfs.2011.31.4.175
- Gyurov, S., Kostova, Y., Klitcheva, G., and Ilinkina, A., 2011 : Themal decomposition of pyro-metallurgical copper slag by oxidation in synthetic air, Waste Manag. Res. 29(2), pp.157-164. https://doi.org/10.1177/0734242X10379495