The Reaction Behavior of 2CaO·SiO2 with CaO-SiO2-FeO-P2O5 Slag

Yansong Song; Xiaojun Hu; Kuochih Chou

doi:10.3390/ma15196594

The Reaction Behavior of 2CaO·SiO₂ with CaO-SiO₂-FeO-P₂O₅ Slag

Materials (Basel). 2022 Sep 22;15(19):6594. doi: 10.3390/ma15196594.

Authors

Yansong Song¹, Xiaojun Hu¹, Kuochih Chou¹

Affiliation

¹ State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.

Abstract

It is important to clarify the reaction behavior of 2CaO·SiO₂ (C₂S) during hot metal dephosphorization. In this study, C₂S was prepared and added to steel slag to investigate the reaction of C₂S particles with CaO-SiO₂-FeO-P₂O₅ slag at 1723 K. The diffusion coefficient of phosphorus in C₂S was calculated. In addition, the influence of the addition of BaO to C₂S was discussed. The results show that the diffusion coefficient of phosphorus in C₂S is 9.23 × 10^-14 m²·s^-1. The Ca in C₂S can be replaced by Ba. Small particles in the solid solution were easily generated from the C₂S body by the addition of BaO, which is beneficial for improving the phosphorus partition between the C₂S solid phase and the liquid phase of the slag.

Keywords: 2CaO·SiO2; dephosphorization; slag; solid solution.

Grants and funding

This research was founded by independent research project from State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing.