Effect of TiO ₂ on equilibrium phase sinter at oxygen partial pressure of 5×10 ⁻³ atm

Abstract

The effect of TiO2 content on the phase compositions of sinter was conducted under reaction equilibrium at oxygen partial pressure of 5×10−3 atm. The results showed that TiO2 mainly existed in the phase of perovskite. With the increase in TiO2 content, the content of secondary hematite phase increased and the ratio of hematite and magnetite in the sinter phase decreased. Meanwhile, the ratio of perovskite and Ca2SiO4 increased and the increased level of perovskite was larger than that of the Ca2SiO4 phase. The volume fraction of the phase silico-ferrite of calcia and alumina decreased from 44·9 to 41·5%, and the chemical formula of silico-ferrite of calcia and alumina changed from 4·7CaO.9·2Fe2O3.Al2O3.2·3SiO2 to 1·6CaO.4·9Fe2O3.Al2O3.1·8SiO2 when the percentage of TiO2 was from 0 to 12 mass-% in the sinter.