Browsing by Author "Muzenda, E"

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    Effect of ball and feed particle size distribution on the milling efficiency of a ball mill: An attainable region approach
    (Elsevier, 2018-02-09) Hlabangana, N.; Danha, Gwiranai; Muzenda, E
    In this article, alternative forms of optimizing the milling efficiency of a laboratory scale ball mill by varying the grinding media size distribution and the feed material particle size distribution were investigated. Silica ore was used as the test material. The experimental parameters that were kept constant in this investigation was the grinding media filling, powder filling and the mill rotational speed. The data obtained from these batch tests was then analyzed using a model free technique called the Attainable Region method. This analysis technique showed that the required product fineness is a function of grinding media and feed material size distributions. It was also observed from the experimental results that in order to increase the milling efficiency of a ball mill, towards optimum production of material in the desired size class, there is a need to correlate the ball size and the feed size distributions
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    Effect of media shape on particle breakage in a batch ball mill: Lessons learnt from population balance model and attainable region technique. Procedia Manufacturing, 35.
    (Elsevier, 2019) Khumalo, S.; Hlabangana, N.; Danha, G.; Muzenda, E
    The batch grinding equation and the Attainable region technique tools were used in evaluating data obtained from the breakage of quartz ore in a laboratory batch ball mill. Using the same milling conditions and grinding equipment, test results were evaluated through the breakage distributions of different size fractions. Results prove that mixing different grinding media increases volume of grinding zones and that translates to an improvement in grinding kinetics and amount of required PSD. The tools are valuable and practical ways of evaluating the breakage of materials on the size fractional base and results of which can be used in the mathematical modelling and optimising of ball milling unit operations.