Affiliation: | [1]School of Chemical & Metallurgical Engineering, University of the Witwatersrand, P/Bag X3, Wits 2050 Johannesburg, South Africa. [2]Department of Mineral Processing Division, Mintek, Johannesburg, South Africa [3]Department of Civil and Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, P/Bag X6, Florida 1710 Johannesburg, South Africa. |