Thermophysical properties, crystallization behavior and structure of CaO–SiO2–MgO–Al2O3–TiO2–FeO slag with varying TiO2 contents.

This study investigated the effect of TiO 2 content on the viscosity, free running temperature, electrical conductivity, crystallization behavior, and structure of high-titanium CaO–SiO 2 -10 wt% MgO-13 wt%Al 2 O 3 –TiO 2 -4 wt.% FeO slag by experiments and molecular dynamics simulations. The results revealed that increasing TiO 2 weakened the overall bonding energy and simplified the slag structure, leading to a decrease in viscosity and an increase in electrical conductivity. Thermodynamic calculations revealed a continuous enrichment of the slag towards the pseudobrookite region with increasing TiO 2 content. The precipitation of pseudobrookite phase during cooling resulted in short-slag characteristics and a rising free running temperature. Additionally, the peak intensity of pseudobrookite phase gradually enhanced and its morphology changed from elongated strips to plates with higher TiO 2 concentration. Structural analysis demonstrated that the poorly stabilized [TiO 6 ] octahedron was the major form of Ti atoms in the slag, and its proportion progressively increased with increasing TiO 2 content. [ABSTRACT FROM AUTHOR]