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    Novel multi-stage aluminium production: part 1 � thermodynamic assessment of carbosulphidation of Al2O3/bauxite using H2S and sodiothermic reduction of Al2S3

    Access Status
    Fulltext not available
    Authors
    Rhamdhani, M.
    Huda, N.
    Khaliq, A.
    Brooks, G.
    Monaghan, B.
    Sheppard, Drew
    Prentice, L.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Rhamdhani, M. and Huda, N. and Khaliq, A. and Brooks, G. and Monaghan, B. and Sheppard, D. and Prentice, L. 2017. Novel multi-stage aluminium production: part 1 � thermodynamic assessment of carbosulphidation of Al2O3/bauxite using H2S and sodiothermic reduction of Al2S3. Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy: pp. 1-12.
    Source Title
    Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy
    DOI
    10.1080/03719553.2017.1293352
    ISSN
    0371-9553
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/52048
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Institute of Materials, Minerals and Mining and The AusIMM Published by Taylor & Francis on behalf of the Institute and The AusIMMA novel multi-stage Al production through a carbosulphidation of Al2O3, followed by a sodiothermic reduction of Al2S3, was proposed. In Stage-1, alumina (or bauxite) is reduced to Al2S3 in the presence of carbon and H2S. In Stage-2, Al2S3 is reduced to Al through reactions with Na or NaH. The thermodynamic analysis predicted Al2S3 to be the main intermediate Al-compound when H2S is reacted with Al2S3 and C at 1000-2000°C at 1 atm. Al2S3 formation was predicted to be low at 1100-1300°C at 1 atm (0.1 moles/mole Al2O3) but increased with increasing temperature (0.96 moles/mole Al2O3 at 1800°C). The thermodynamic analysis of sodiothermic reduction predicted that Al metal can be extracted from Al2S3 below 800°C at 1 atm. The Na2S produced can be hydrolysed to form H2S and NaOH. H2S can be re-used and the Na can be reproduced from NaOH and put back into the process.

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