Abstract: The reduction process of titanomagnetite concentrate pellets was studied under the simulated condition of blast furnace with different oxygen enrichment rate. The microstructure of the pellets during reduction was observed by scanning electron microscopy. The distribution of different elements in ores was identified by energy dispersive spectrometry. The kinetics of the reduction process was also analyzed. The results show that both the reduction rate and reaction rate increases with the increase of oxygen enrichment rate. Al atoms migrate and get enrichment in high titanium content iron ores， eventually Al and Ti atomic number ratio is 1∶3. Al is likely to solute into titanium iron oxides to form a kind of composite iron compound which results in the restrain of reduction. Three models were used to analyze the reduction process comparatively， and it was shown that the hybrid model was in good agreement with the whole process. The kinetic parameters of pellets reduction process were calculated using the hybrid model. The results exhibit that with the increase of the rate of oxygen enrichment from zero to 79%， the reduction activation energy decreases from 26.5kJ/mol to 19.68kJ/mol.

Key words: titanomagnetite, pellets, reduction process, oxygen enrichment rate, kinetics