Processing of high alumina iron ore slimes using classification and flotation

Application of response surface methodology for modeling and optimization of spiral separator for processing of iron ore slime

“…Earlier efforts were made to recover iron values from iron ore slime [5][6][7][8]. A combination of classification followed by flotation was studied to treat high alumina iron ore slimes of size below 45 micron [9]. Srivastava et al [10] studied the beneficiation of iron ore slime of size below 110 micron using hydro cyclone and spiral concentrator.…”

Upgrading of High-Aluminum Hematite-Limonite Ore by High Temperature Reduction-Wet Magnetic Separation Process

“…FeO + Al2O3 = FeAl2O4 (7) 3Al2O3+2SiO2= Al6Si2O13 (8) 4FeO + Al6Si2O13 = 2Fe2SiO4 + 3Al2O3 (9) 3FeO + Al6Si2O13 = 3FeAl2O4 + 2SiO2 Equation (11) Equation (12) Equation (9) Equation (17) Equation (13) Equation (18) Equation (14) Equation (15) Equation (8) Equation (7) Equation (6) Equation (10) Equation ( (6)- (18) by FactSage7.0.…”

“…Many upgrading approaches have been published for high-aluminum limonite ore, including physical and chemical processes [4]. Recent research was focused on gravity concentration and magnetic separation [7], flotation [8,9], sodium roasting and the magnetic separation process [3,[10][11][12][13][14][15]. However, iron and aluminum cannot be separated completely by physical processes, completely by physical processes, so iron recovery is low by the flotation process (around 70%), and as high as beyond 10% of sodium additive is needed by the sodium roasting process, which brings the risk of the degradation of refractory materials in furnaces [16,17] and higher costs.…”

Recovery of iron minerals from Indian iron ore slimes using colloidal magnetic coating

“…Depending on the iron content in the slime, it was possible to achieve concentrates assaying 60-65% Fe at 60-80% of iron recovery [9]. In some instances, classification of slimes by hydrocyclone followed by flotation was applied to achieve a suitable iron concentrate [10,11]. A comparative study of cationic and anionic flotation of the Vale iron ore slime had indicated that the overall Fe recovery in anionic flotation using fatty acids was significantly higher than cationic flotation by amines [12].…”