Role of the Mineralogy of Silicates in Reverse Cationic Flotation of the Hematite Containing Products from Wet Magnetic Separation of Iron Ores
The traditional technological flow sheets for processing of ferrous quartzite (magnetite ores) allow production of the iron concentrates with Fe content of 65%～68% and recovery level about 55%. The losses of iron with the tails of wet magnetic separation are related to hematite and quartz-magnetite particles, which are not extracted under low magnetic field employed.This work presents the results of the application of reverse cationic flotation for production of hematite concentrates with weak silica content from the tailings of wet magnetic separation of magnetite. Fine particle size, complex mineralogy and presence of locked particles determine the impossibility of direct production of hematite concentrate by flotation or magnetic separation. The gravity concentration allows obtaining of iron concentrate from the well-prepared feed (size fraction -53+20 μm) but with very low recovery. Thus, hematite concentrates with weak silica content and satisfactory iron recovery were obtained by reverse cationic flotation, when it was fed with iron pre-concentrate produced by high gradient magnetic separation.The best flotation results were obtained by the use of formulations based on amines of different molecular structure that modulate the structure of adsorption layer, and favour a shifting of hydrophilic-hydrophobic balance on the surface of silicates with adsorbed starch and their preferential transfer into the froth product.
Ferrous quartzites Hematite HGMS Silicates Flotation Etheramines
L. O. Filippov I. V. Filippova V. V. Severov
Laboratoire Envirormement et Min(e)ralurgie, Nancy University, CNRS, Rue du Doyen M. Roubault, France
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
144-153
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）