The effect of various states of Fe(Fe,FeO,and Fe2O3) on the reduction of Cr2O3 was investigated by conducting isothermal experiments on the reduction of Fe-Cr2O3,Fe2O3-Cr2O3 and FeCr2O4 by graphite at 1350-1550℃ combined with X-ray diffraction and scanning electron microscopy with energy-dispersive spectrometry. It is shown that the tendency of final reduction degree is Fe2O3-Cr2O3-C 〉 FeCr2O4-C 〉 Fe-Cr2O3-C at each temperature,and the transformation path of the three samples is oxides → carbides → Fe-Cr-C alloy. Liquid alloy which earlier emerges and low carbon-content carbides promote the reduction of Fe2O3-Cr2O3. Low carbon dissolution in liquid alloy limits the reduction degree of FeCr2O4. The large amount of carbides and little liquid alloy retard the reduction of Fe-Cr2O3. The apparent activation energies of Fe-Cr2O3-C,FeCr2O4-C and Fe2O3-Cr2O3-C are 142.90,111.84 and 128.9 kJ·mol-1,respectively.
