Abstract
High-iron red mud is an alkaline solid waste generated during the process of alumina production by Bayer process. At present, the annual emissions of high-iron red mud are about 50 million tons in China. Due to strong alkalinity, the comprehensive utilization of high-iron red mud is limited. In order to realize high-value utilization of such material, a new smelting reduction technology followed by production of cement clinker from reduced slag was proposed. This paper focused on the smelting reduction of high-iron red mud. The effects of temperature, mole ratio of C/O, additive ratio of CaF2, and basicity on recovery rates of iron and sodium were investigated in detail. The results showed that the recovery rates of iron and sodium were 98.36% and 38.45%, respectively. The chemical compositions of pig iron meet the national standard of pig iron for steel-making.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (U1710257, U1702253, U1903129), the National key research and development plan (2017YFC0210403-04, 2017YFC0210404).
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Wang, K., Liu, Y., Li, X., Dou, Z., Lu, G., Zhang, T. (2022). Production of Pig Iron from High-Iron Red Mud by Smelting Reduction. In: Eskin, D. (eds) Light Metals 2022. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-92529-1_6
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DOI: https://doi.org/10.1007/978-3-030-92529-1_6
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