S. O. Bada, A. S. Afolabi, and M. J. Makhula, Effect of reverse flotation on magnetic separation concentrates, Int. J. Miner. Metall. Mater., 19(2012), No. 8, pp. 669-674. https://doi.org/10.1007/s12613-012-0611-5
Cite this article as:
S. O. Bada, A. S. Afolabi, and M. J. Makhula, Effect of reverse flotation on magnetic separation concentrates, Int. J. Miner. Metall. Mater., 19(2012), No. 8, pp. 669-674. https://doi.org/10.1007/s12613-012-0611-5
S. O. Bada, A. S. Afolabi, and M. J. Makhula, Effect of reverse flotation on magnetic separation concentrates, Int. J. Miner. Metall. Mater., 19(2012), No. 8, pp. 669-674. https://doi.org/10.1007/s12613-012-0611-5
Citation:
S. O. Bada, A. S. Afolabi, and M. J. Makhula, Effect of reverse flotation on magnetic separation concentrates, Int. J. Miner. Metall. Mater., 19(2012), No. 8, pp. 669-674. https://doi.org/10.1007/s12613-012-0611-5
School of Chemical & Metallurgical Engineering, University of the Witwatersrand, P/Bag X3, Wits 2050, Johannesburg, South Africa
Department of Mineral Processing Division, Mintek, Johannesburg, South Africa
Department of Civil and Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, P/Bag X6, Florida 1710, Johannesburg, South Africa
Reverse flotation studies on magnetite samples have revealed that the use of starch as a depressant of Fe-oxides has a hydrophilic effect on the surface of Fe-bearing silicates and significantly decreases Fe in the silica-rich stream when used in combination with an amine (Lilaflot D817M). In this study, the effect of reverse flotation on the optimization of products obtained from magnetic separation was investigated. Two different magnetic samples, zones 1 and 2, were milled to <75 μm and then subjected to low intensity magnetic separation (LIMS). The LIMS test conducted on the <75 μm shown an upgrade of 46.40wt% Fe, 28.40wt% SiO2 and 2.61wt% MnO for zone 1 and 47.60wt% Fe, 29.17wt% SiO2 and 0.50wt% MnO for zone 2. Further milling of the ore to <25 μm resulted in a higher magnetic-rich product after magnetic separation. Reverse flotation tests were conducted on the agitated magnetic concentrate feed, and the result shows a significant upgrade of Fe compared to that obtained from the non-agitated feed. Iron concentrations greater than 69%, and SiO2 concentrations less than 2% with overall magnetite recoveries greater than 67% and 71% were obtained for zones 1 and 2, respectively.
School of Chemical & Metallurgical Engineering, University of the Witwatersrand, P/Bag X3, Wits 2050, Johannesburg, South Africa
Department of Mineral Processing Division, Mintek, Johannesburg, South Africa
Department of Civil and Chemical Engineering, College of Science, Engineering and Technology, University of South Africa, P/Bag X6, Florida 1710, Johannesburg, South Africa
Reverse flotation studies on magnetite samples have revealed that the use of starch as a depressant of Fe-oxides has a hydrophilic effect on the surface of Fe-bearing silicates and significantly decreases Fe in the silica-rich stream when used in combination with an amine (Lilaflot D817M). In this study, the effect of reverse flotation on the optimization of products obtained from magnetic separation was investigated. Two different magnetic samples, zones 1 and 2, were milled to <75 μm and then subjected to low intensity magnetic separation (LIMS). The LIMS test conducted on the <75 μm shown an upgrade of 46.40wt% Fe, 28.40wt% SiO2 and 2.61wt% MnO for zone 1 and 47.60wt% Fe, 29.17wt% SiO2 and 0.50wt% MnO for zone 2. Further milling of the ore to <25 μm resulted in a higher magnetic-rich product after magnetic separation. Reverse flotation tests were conducted on the agitated magnetic concentrate feed, and the result shows a significant upgrade of Fe compared to that obtained from the non-agitated feed. Iron concentrations greater than 69%, and SiO2 concentrations less than 2% with overall magnetite recoveries greater than 67% and 71% were obtained for zones 1 and 2, respectively.
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