The stability of the dispersed phase in 10 wt per cent slurry of iron ore slime and fines was studied at pH 5 and different concentrations of surface-active agents. The behaviour of the dispersed phase of iron ore slime and fines is different for different surface-active agents. The improvement of iron value of slime and fines in the presence of surface-active agent is best realized at pH 8, where the Al2O3/Fe and Al2O3/SiO2 ratios in the concentrates are appreciably reduced. The polar functional group like -COO- interacts with hematite surfaces and forms outer- and inner-sphere surface complexes depending on the suspension pH and adsorbate._x000D_
CITATION:Mahiuddin, S and Sengupta, P, 2010. Beneficiation of iron ore - Washing with surface-active agent, in Proceedings XXV International Mineral Processing Congress (IMPC) 2010, pp 359-366 (The Australasian Institute of Mining and Metallurgy: Melbourne).