Affiliation: | 1. School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Private Bag 3, Wits, Johannesburg, 2050, South Africa 2. Department of Process Engineering, University of Stellenbosch, Private Bag X1, Matieland, Stellenbosch, 7602, South Africa 3. Castco Precision Castings, P.O. Box 19133, Tygerberg, 7505, South Africa
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