|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials 2021
||Solid State Reaction and Diffusion Behavior of Calcium Ferrite and TiO2
||Mingrui Yang, Xuewei Lv, Lilian Yang, Chenguang Bai
|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. The diffusion interface was divided into three layers based on phases analysis, layer I was composed of CaTiO3, layer II was composed of Fe2O3, CaTiO3, CaFe2O4 and Ca2Fe2O5, while the CaTiO3, Fe2O3, CaFe2O3 and CaFe4O7 generated in the layer III.