|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Solid State Reaction Behavior of Calcium Ferrite and TiO2 at Temperature Range of 1423K to 1623K
||Mingrui Yang, Xuangeng Zhou, Zhongci Liu, Xuewei Lv
|On-Site Speaker (Planned)
The TiO2 was a harmful component in iron ore sintering process and the TiO2 reacted with calcium ferrite to produce perovskite hence decrease the quality of sinter. The solid reaction and diffusion behaviors between the calcium-ferrite based slag and TiO2 were investigated using a diffusion couple method at the temperature range of 1323 to 1473K under air atmosphere. The phase composition and interfacial microstructure were analyzed using the optical microscope, X-Ray diffraction and scanning electron microscope. The concentration gradient of Ca2+ in the diffusion layer and the diffusion of Ca2+ in CaTiO3 was the limited step in diffusion reaction. After diffusion reaction, the interface was serrated and a two-layer structure formed at the interface. The first layer was made up with perovskite, the second layer was made up Fe2O3 and pseudobrookite.