Effect of pre-oxidation on Panzhihua ilmenite in solid state reduction process

The effect of pre-oxidation on the reduction behavior of Panzhihua ilmenite was studied.The results show that pre-oxidation can speed up the reduction rate of ilmenite iron oxide and improve the iron metallization rate of reduction products.The action mechanism is that new phases of shame rutile,ferric oxide,rutile,and trivalent pseudobrookite formed in the pre-oxidation process of ilmenite,which destroyed the structure of original minerals and formed plenty of pores in the granule interior.It would be beneficial to enlarge the specific surface area of the granule and improve the gas diffusion in reduction process.Also after pretreatment of oxidation,new phases formed in pre-oxidation process would be re-reduced,neonatal ilmenite has high activity,and the microstructure of reduction products is improved.