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    The effect of microwave pretreatment on the liberation of a copper carbonate ore after milling

    Access Status
    Fulltext not available
    Authors
    Scott, G.
    Bradshaw, S.
    Eksteen, Jacques
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Scott, G. and Bradshaw, S. and Eksteen, J. 2008. The effect of microwave pretreatment on the liberation of a copper carbonate ore after milling. International Journal of Mineral Processing. 85 (4): pp. 121-128.
    Source Title
    International Journal of Mineral Processing
    DOI
    10.1016/j.minpro.2007.08.005
    ISSN
    03017516
    URI
    http://hdl.handle.net/20.500.11937/17311
    Collection
    • Curtin Research Publications
    Abstract

    The effects of microwave treatment on the liberation spectrum of a rod-milled South African carbonatite ore are presented based on quantitative mineralogical analysis. The treated ore was processed for 0.5 s at 10.5 kW in a single mode microwave cavity in batches of 1 kg. The ore selected for microwave treatment was a sample from a tertiary crusher product stream feed to a rod mill. The treated and untreated ore were subsequently grinded to 80%–800 µm. The microwave treated ore showed a significant increase in the amount of liberated copper minerals in the relatively coarse particle size range (106 to 300 µm). Similar significant shifts in the liberation spectra were noted for all the minerals in the ore. It is inferred that microwave treatment induces changes in the fracture pattern, favouring liberation of microwave susceptible minerals at larger particle sizes.

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