The use of collectors mixture in the reverse cationic flotation of magnetite ore: The role of Fe-bearing silicates |
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| Authors: | LO Filippov IV Filippova VV Severov |
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| Affiliation: | 1. Laboratoire Environnement et Minéralurgie, LEM CNRS – Nancy Université, Rue du Doyen M. Roubault, B.P. 40, F-54501 Vandoeuvre-lès-Nancy, France;2. STU Moscow Institute of Steel and Alloys, Leninsky pr., 4, 119049 Moscow, Russia;1. Surface Chemistry Lab, Instituto de Metalurgia, Universidad Autónoma de San Luís Potosí, Av. Sierra Leona 550, San Luis Potosí, SLP 78210, Mexico;2. División de Ingenierías, Departamento de Minas, Metalurgia y Geología, Universidad de Guanajuato, Ex Hacienda de San Matías S/N, Guanajuato, Gto 36020, Mexico;3. División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, A.C., Camino a la Presa 2055, San Luis Potosí, SLP 78216, Mexico;4. Frisco, I&D, Zona Norte, Servicios Corporativos Frisco, S.A., Lago Zurich 245, Cd. de México 11529, Mexico;5. Centro de Investigación y Desarrollo Tecnológico, Departamento de Procesamiento de Minerales, Servicios Especializados Peñoles, S.A. Prolongación Comonfort 2050, Torreón, Coah. 27300 Mexico;6. Instituto de Física, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava 6, Zona Universitaria, San Luis Potosí, SLP 78290 Mexico;1. VALE SA, Mina de Águas Claras, Prédio 1, Av. de Ligação, 3580, 34000-000 Nova Lima, MG, Brazil;2. Escola de Engenharia UFMG, Av. Antonio Carlos, 6627, 31270-360 Belo Horizonte, MG, Brazil;1. Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology Ganzhou 341000, China;2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan, Hubei 430070, China;3. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;1. Department of Ore Beneficiation and Agglomeration, Central Metallurgical R&D Institute, Cairo, P.O. Box 87, Helwan, Egypt;2. Department of Chemistry, Faculty of Science, Helwan University, Cairo, Egypt;3. Department of Microbial Chemistry, National Research Centre, Dokki, Giza, Egypt |
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| Abstract: | The paper describes effective reagent combinations for removal of silicates by reverse cationic flotation from magnetic concentrate in magnetite ores processing. This work is based on a hypothesis that a further development in reverse cationic flotation of iron ores implies, a more detailed consideration of the nature of the Fe-bearing gangue minerals. Thus, the choice of reagent regime has been determined by the similar physicochemical properties of iron oxides and silicates such as amphiboles due to inclusion of iron into their crystal lattice. Zeta-potential studies of Fe-oxides, quartz and Fe-bearing amphibole samples have shown that amines of different molecular structure are equally well adsorbed both on the surface of Fe-oxides and on the surface of silicates within рН range of 4–10. Flotation studies of quartz and Fe-bearing amphibole 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 their flotation by ether amines. Flotation of these minerals is not possible by primary monoamines in the presence of starch due to the adsorption layer formation.The experimentally selected mixtures of ether amines with primary monoamines or with alcohols provide formation of a hydrophobic adsorption layer on the surface of amphiboles and magnetite–silicate aggregates, even in the presence of starch in the system. A total hydrophobic effect is sufficient for an effective flotation of the entire silicate complex and producing of magnetite concentrates with SiO2 content <1.0% and Fe content up to 70.3% from magnetic concentrate with SiO2 content ～3%. |
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