Synthesis and Non-isothermal Carbothermic Reduction of FeTiO3-Fe2O3 Solid Solution Systems

To explore the carbothermic reduction behaviors of the xFeTiO(3)center dot(1-x)Fe2O3 solid solutions with various x values, the solid solutions were artificially synthesized and then subjected to non-isothermal carbothermic reduction. The results show that the solid solutions are of uniform texture and high purity. Meanwhile, lattice distortion degree of FeTiO3 are increased with increasing the value of x, and the initial reduction temperature and reduction rate which is the increasing rate of reduction degree alpha are also improved. The reduction of FeTiO3 could be improved by Fe2O3 dissolving, and the Fe2TiO4 as well as Fe3Ti3O10 exist as the transition phase in the reduction process. FeO, Fe2TiO4 and TiO2 are firstly generated in the interface of solid-graphite, and then reduced to Fe and Ti2O3. It is concluded that the apparent activation energy is 295.54 kJ/mol from the calculation and analysis of the non-isothermal kinetics for the carbon thermal reduction process.