Reaction of FeO-V2O5 System at High Temperature

FeO and V2O5 are two main components of the obtained vanadium steel slag, and the reaction of FeO-V2O5 system determines the physical property of the slag. Through thermodynamic calculation and experimental study, it can be found that within the ranges of steel-making temperature, V2O5 is reduced to VO2. As FeO exists in FeO-V2O5 system, VO2 will be reduced to V2O3 further while FeO is oxidized to Fe2O3. In this multi-system, as the content of FeO and temperature increase, the system will have products in turn such as V3O5, V3O4, FeVO4, Fe2VO4 and Fe3O4. The products are mainly V3O5 and Fe2O3 when the content of FeO is 0.58 mol and the temperature is 1100 K, and as the temperature increases, Fe2O3 starts to react with V2O5 and then generates FeVO4; FeVO4 disappears while the content of FeO and the temperature increase at the same time, and then Fe2VO4 is generated by the reaction of FeO, Fe2O3 and V2O3. Iron oxides are also generated such as Fe3O4 and so on.