Experiment on Preoxidation and Hydrogen Reduction of Ilmenite in the Fluidized Bed

Using ilmenite as raw materials to produce titanium slag by hydrogen reduction in the fluidized bed can not only expand sources of raw materials and lower energy consumption,but also realize cleaner production.On the basis of cold test,preoxidation and hydrogen reduction of ilmenite in the fluidized bed was studied and effects of temperature,reduction time,particle size of ilmenite and the pressure of H₂ on metallization of Fe were investigated.The results indicate that metallization of Fe increases markedly with the rise of reduction temperature between 800 ℃ and 950 ℃;metallization of Fe increases rapidly at the beginning and then tends to slow down under the same reduction temperature;metallization of Fe increases remarkably with the decrease of particle size of ilmenite;the concentration of H₂ has so strong an effect on the metallization of Fe that the reduction rate rises dramatically with higher concentration of H₂.