Abstract
The dissolution of a wide range of commercially produced aluminas in modified cryolite bath was studied on a laboratory scale. Most of the aluminas were products of conventional refineries and smelter dry scrubbing systems; a few were produced in laboratory and pilot calciners, enabling greater flexibility in the calcination process and the final properties. The mode of alumina feeding and the size of addition approximated to the point feeder situation. Alpha-alumina content, B.E.T. surface area and median particle size had little impact on dissolution behaviour. The volatiles content, expressed as L.O.I., the morphology of the original hydrate and the mode of calcination had the most influence. Discrete intermediate oxide phases were identified in all samples; delta-alumina content impacted most on dissolution. The flow properties of an alumina affected its overall dissolution.
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References
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© 2016 The Minerals, Metals & Materials Society
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Bagshaw, A.N., Welch, B.J. (2016). The Influence of Alumina Properties on its Dissolution in Smelting Electrolyte. In: Donaldson, D., Raahauge, B.E. (eds) Essential Readings in Light Metals. Springer, Cham. https://doi.org/10.1007/978-3-319-48176-0_107
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DOI: https://doi.org/10.1007/978-3-319-48176-0_107
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48574-4
Online ISBN: 978-3-319-48176-0
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