Abstract
Magnetite powder and coke powder were used as experimental materials and H2 as reducing agent in a high temperature vacuum tube furnace. The change rules of magnetite powder (MP), mixed coke powder and magnetite powder (MCMP), and carbon coated magnetite powder (CCMP) in the process of reduction were studied. The samples were determined by field emission scanning electron microscopy and X-ray diffraction. The results show that, with the increase of reduction time, the reduction degree of magnetite powder is improved. Under the same reduction conditions, the addition of coke powder improves the reduction rate. Compared with MP, when the reduction time was 120 min, the reduction degree of MCMP was 30% greater; and the reduction degree of CCMP was 39% greater. The mixed grinding of magnetite powder and coke powder is a better way to add carbon. Under the same reduction conditions, compared with MCMP, the reduction degree of CCMP was 9% greater when the reduction time was 120 min. After the reduction of CCMP, the number of pores in the sample increased and the structure was loose. The results of this study have some reference value for improving the reduction rate of magnetite powder.
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Acknowledgements
The authors sincerely acknowledge financial support from the National Natural Science Foundation of China (NSFC) (No. 51274084); Natural Science Foundation of Hebei Province of China (No. E2017209231); China Scholarship Council (CSC) and Michigan Technological University to provide Suju Hao scholarship; and Evergreen Technology support.
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© 2018 The Minerals, Metals & Materials Society
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Jiang, W., Hwang, JY., Hao, S., Zhang, Y. (2018). Effect of Carbon Coating on Magnetite Reduction. In: Hwang, JY., et al. 9th International Symposium on High-Temperature Metallurgical Processing. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72138-5_44
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DOI: https://doi.org/10.1007/978-3-319-72138-5_44
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