Abstract
The reduction of chromite ore is an important step in the production of ferrochromium alloy and stainless steel. The comparison between conventional and microwave reduction of chromite ore was investigated in this study with a focus on the effect of reduction time. Compared to conventional reduction, microwave reduction of chromite ore was more efficient by breaking the stable chromium-containing spinel structure, improving reduction performance of the ore with generation of large Fe–Cr particles. By fixing reduction temperature of 1100 °C and C/O molar ratio of 1.2, the metallization degrees of chromium and iron of the briquettes constituted by chromite ore and coke after microwave reduction increased from 91.57 and 83.03% to 93.53 and 85.78%, respectively, with increasing time from 0 to 120 min, which were higher than those obtained by conventional reduction for 4 h (7.00% for chromium and 67.26% for iron).
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This work was partially supported by the National Natural Science Foundation of China under Grant 72088101.
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© 2024 The Minerals, Metals & Materials Society
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Tang, H., Peng, Z., Yin, T., Ye, L., Zhong, Q., Rao, M. (2024). Microwave and Conventional Carbothermic Reduction of Chromite Ore: A Comparison. In: Peng, Z., et al. Characterization of Minerals, Metals, and Materials 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50304-7_6
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DOI: https://doi.org/10.1007/978-3-031-50304-7_6
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