Abstract
The calcification-carbonization method is a recently developed hydrometallurgical treatment process which can effectively realize the scale of Bayer process residue for aluminium and sodium recovery . In order to reduce the water consumption in the process, and increase extraction efficiency of the low alkali concentration solution generated in the process, the effects of varying alkali concentration of the calcification reaction solution and the alkali concentration of the carbonization reaction solution on the calcification carbonization process were investigated. The experimental results showed that at low alkali concentration (Na2O < 50 g/L), the solution had no significant effect on the calcification-carbonization process, as Al2O3 recovery rate fluctuates between 34–37%. As the alkali concentration of the solution increases (Na2O > 50 g/L), the Al2O3 recovery rate decreases to less than 20%.
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Chen, Y., Zhang, Ta., Lv, Gz., Chao, X. (2020). Effect of Sodium Alkali Concentration on Calcification–Carbonization Process. In: Tomsett, A. (eds) Light Metals 2020. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36408-3_20
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DOI: https://doi.org/10.1007/978-3-030-36408-3_20
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