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Acid leaching of ilmenite (FeTiO3) obtained from beach sand was found to be more effective when roasted with ZnO or ZnS at 900°C. Remarkably higher iron and titanium leaching rates were observed when compared with normal ilmenite in 5.0M HCl at 30°C and 6.0M H2SO4 at 110°C, respectively. Roasting of ilmenite with ZnO or ZnS converts acid resistant FeTiO3 to more reactive Fe2O3 and Zn2TiO4, resulting...
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