Due to deterioration of bauxite quality, the world is now turning its attention toward development of new processes for alumina production and toward improvement of old processes. It is well known that the poorer the quality (the higher the silica content) of bauxite used for alumina production by the Bayer process, the large the amount of aluminum and sodium oxide lost with the red mud during the bauxite leaching process. In order to develop an efficient method for extracting the alkali from the production waste – red mud – and returning it to the process, we must study the impact of sodium hydroaluminosilicate (SHAS) structure and composition of on alkali extraction efficiency when the red mud is processed with lime (this process results in the formation of SHASs during bauxite leaching).
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Translated from Metallurg, No. 11, pp. 78–82, November, 2008.
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Suss, A.G., Lapin, A.A., Kuznetsova, N.V. et al. Study of the effect of sodium hydroaluminosilicates on efficiency of alkali regeneration processes. Metallurgist 52, 641–647 (2008). https://doi.org/10.1007/s11015-009-9107-6
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DOI: https://doi.org/10.1007/s11015-009-9107-6