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Chemical Processing of Bauxite: Alumina and Silica Minerals—Chemistry, Kinetics and Reactor Design

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Smelter Grade Alumina from Bauxite

Part of the book series: Springer Series in Materials Science ((SSMATERIALS,volume 320))

Abstract

This Chapter provides an introduction to the Bayer process and how the mineral composition of bauxites affects the process variants and the principal parameters to be selected. The Chapter covers the rational of sizing of principal equipment (such as heat recovery system and reactors) and also of calculating the energy (heat) requirement of the digestion unit operation. Beside the processing behaviour of the main constituents of bauxite such as hydrated alumina and silica minerals, the Chapter covers the impact of other constituents, such as titania, iron compounds, organics, and other impurities. The use of lime in the Bayer process and the chemistry behind that is also discussed.

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Acknowledgements

The Authors are grateful for Robert LaMacchia for his active involvement during the outlining of the Chapter. Special thanks should be emphasized to Steve P. Rosenberg and Peter Smith for their contributions to the Lime Chemistry.

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    György (George) Bánvölgyi

  2. Hatch, Brisbane, Australia

    Brady Haneman

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  1. FLSmidth A/S, General Manager–Pyro& Alumina Technology, Valby, Staden København, Denmark

    Benny E. Raahauge

  2. Retired Alcoa, Longmont, CO, USA

    Fred S. Williams

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Bánvölgyi, G.(., Haneman, B. (2022). Chemical Processing of Bauxite: Alumina and Silica Minerals—Chemistry, Kinetics and Reactor Design. In: Raahauge, B.E., Williams, F.S. (eds) Smelter Grade Alumina from Bauxite. Springer Series in Materials Science, vol 320. Springer, Cham. https://doi.org/10.1007/978-3-030-88586-1_4

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