|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||Effect of TiO2 on Thermophysical Properties and Structure of P-bearing Steelmaking Slags
||Zhanjun Wang, Zuotai Zhang, Mei Zhang, Min Guo
|On-Site Speaker (Planned)
In this study, the viscous flow and crystallization behavior of CaO-SiO2-MgO-Al2O3-FetO-P2O5-TiO2 steelmaking slags have been investigated over a wide range of temperatures. The results indicated that the viscosity of the slags decreased with increasing TiO2 content. The constructed non-isothermal continuous cooling transformation (CCT) diagrams revealed that the addition of TiO2 lowered the crystallization temperatures. This can mainly be ascribed that the addition of TiO2 promotes the formation of [TiO6]-octahedra units, thereby MgFe2O4-Mg2TiO4 solid solution is formed. Moreover, the decreasing viscosity has a significant effect on the diffusion of ion units, such as Ca2+ and [TiO4]-tetrahedra, from bulk melts to crystal-melt interface. The crystallization of CaTiO3 and CaSiTiO5 was therefore accelerated, which can improve the phosphorus content in P-enriched phase. Finally, the non-isothermal crystallization kinetics was characterized and the activation energy for the primary crystal growth was derived.
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