Abstract
The novel calcification-carbonation method was proposed to process the diasporic red mud discharged from Bayer process alumina plant. In this study, Batch experiments were performed to evaluate the potential effects of important parameters such as temperature, amount of CaO added, CO2 partial pressure and carbonation cycles on the recovery of alkali and alumina. The results showed that 78.74% alumina was recovered from the diasporic red mud with decreases in the mass ratios of Al2O3 to SiO2 (A/S) from 1.27 to 0.27. The Na2O content in the processed red mud was less than 0.3 wt%, and it can be used as a construction material.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (No.: U1202274, U1402271, 51504059), the Fundamental Research Funds for the Central Universities of China (No.: N140203005, N140204015), the Postdoctoral Science Foundation Funded Project of China (No.: 2015M581352) and the Education Department of Liaoning Province Science and Technology Research Project (L2014096).
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Zhu, Xf. et al. (2017). Processing Diasporic Red Mud by the Calcification-Carbonation Method. In: Ratvik, A. (eds) Light Metals 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51541-0_12
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DOI: https://doi.org/10.1007/978-3-319-51541-0_12
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