探讨钛铁矿氧化过程中的物相转化、形貌改变及其氧化机理。在700～800℃时,钛铁矿(FeTiO3)转变为赤铁矿(Fe2O3)和金红石(TiO2),当温度高于900℃时,三价铁板钛矿开始形成。原始的钛铁矿粉末呈现顺磁性,但是经过中温(800～850℃)氧化后,氧化产物呈现弱铁磁性。同时,讨论钛铁矿的氧化机理。通过对微结构的观察,发现在中温氧化过程中颗粒表面出现大量微孔,其在氧化过程中能够强化氧的传质。 Discuss the phase transformation, morphology change and oxidation mechanism of ilmenite oxidation. At 700-800 ℃, the ilmenite (FeTiO3) is transformed into hematite (Fe2O3) and rutile (TiO2). When the temperature is higher than 900 ℃, the trivalent iron brookite begins to form. The original ilmenite powder exhibits paramagnetic properties, but the oxidation products exhibit weak ferromagnetic properties after being oxidized at medium temperature (800 ~ 850 ℃). At the same time, discuss the oxidation mechanism of ilmenite. Through the observation of the microstructure, it was found that a large number of micropores appeared on the surface of the particles during the mid-temperature oxidation process, which can enhance the mass transfer of oxygen in the oxidation process.