The Phase Change Study of Titanium Concentrate during Heat Treatment

Titanium concentrate mainly contains the elements, Ti, Fe, Si, Ca, Mg, Al, P, S, Ba, Zr and etc, by XRF. Its original main phase was very likely FeTiO3 by XRD. After treated at 673K for 10h, the phases had only slightly changed, with a little weight gain (about 0.32%). After treated at 1273K for 10h, its phases had been changed to very complex solid solutions, which may contain Fe2TiO5, Fe3Ti3O10, TiO2 (rutile), Fe2O3 and etc, with an obvious weight gain (about 3.35%). The phase change may be caused by the reaction of titanium concentrate with oxygen. Obvious relative loss of the main elements was found during heat treatments especially sulfur. Most of sulfur had been volatilized during the heat treatment at 1273K. It may be conducive to better development and utilization processing of titanium concentrate.