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Investigation of the Kinetics of Reduction of Iron Titanate (FeTiO3) by Hydrogen

In the present study, the reduction kinetics of synthetic ilmenite by H 2 has been carried out using thermogravimetric technique. This has been complemented by X-ray diffraction and scanning electron microscopic (SEM) analyses. The morphology of the reduced product shows that iron metal is distributed around the titanium oxide particles, which has important implications for the separation of iron and titanium dioxide in the recovery of the same from ilmenite. The reduction proceeds very fast in the initial period and a high degree of reduction is obtained in the case of all reductions. A decrease in the reaction rate is observed at later stages of the reduction due to the slow diffusion process. An activation energy for the reduction of FeTiO 3 to iron and titanium dioxide was estimate to be of 108 kJ.mole -1 .