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    Zinc sulfide as a solid phase additive for improving the processing characteristics of ferrihydrite residues

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    Access Status
    Open access
    Authors
    Richmond, William
    Loan, Mitch
    Parkinson, Gordon
    Newman, M.
    Date
    2005
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Richmond, William and Loan, Mitch and Parkinson, Gordon and Newman, Mike. 2005. Zinc sulfide as a solid phase additive for improving the processing characteristics of ferrihydrite residues. Hydrometallurgy 78: 172-179.
    Source Title
    Hydrometallurgy
    DOI
    10.1016/j.hydromet.2005.02.005
    Faculty
    Department of Applied Chemistry
    Division of Engineering, Science and Computing
    Faculty of Science
    Remarks

    Copyright 2006 Elsevier B.V. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/4254
    Collection
    • Curtin Research Publications
    Abstract

    The effect of ZnS powders as additives for improving the physical and chemical properties of ferrihydrite residues has been studied in both kinetic and batch experiments. Four ZnS samples were compared: two industrial ZnS concentrates, high purity ZnS pieces, and a sample of synthetic ZnS nanoparticles. The industrial ZnS concentrates were found to be the most effective for promoting the transformation of ferrihydrite to hematite, and this effect was found to be due to their lower surface charge at pH 3, which promotes formation of mixed ZnS/ferrihydrite aggregates. For the high purity ZnS samples, aggregation was not favoured, and only goethite formation was promoted. The effect of particle size of the ZnS additive was also studied, and it was found that samples of smaller average particle size were more effective in promoting phase transformation. Measurement of filtration times and moisture content of ferrihydrite residues precipitated in the presence of ZnS showed only minor improvement in physical handling and indicated that better control of surface properties of the additive would be needed to optimise its effect on phase transformation.

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