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    Kinetics of malachite leaching in alkaline glycine solutions

    Access Status
    Fulltext not available
    Authors
    Tanda, B.
    Oraby, Elsayed
    Eksteen, Jacques
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Tanda, B. and Oraby, E. and Eksteen, J. 2018. Kinetics of malachite leaching in alkaline glycine solutions. Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy.
    Source Title
    Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy
    DOI
    10.1080/25726641.2018.1505211
    ISSN
    2572-6641
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/73096
    Collection
    • Curtin Research Publications
    Abstract

    Aqueous alkaline glycine solutions present technical advantages over acidic solutions for leaching oxidised copper minerals hosted in carbonate mineral matrix phases. In this study, the leaching and kinetics of malachite in alkaline glycine solutions have been studied. The influence of process variables such as glycine concentration, temperature, particle size and stirring speed on leaching kinetics was evaluated. The results show that temperature has a significant effect on copper dissolution rates. A temperature increase from 25°C to 50°C resulted in a copper extraction of 32.3–83.6% respectively over 5 min. Increasing glycine concentration and reducing particle size led to an increase in copper extraction rates while no significant influence was observed with stirring speeds above 350 rpm.

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