Effect of TiO2 on Slag Fluidity Under Different Atmospheres

In this study, we determined the influence of different TiO2TiO2 contents in high-alumina slag under a neutral atmosphereAtmosphere, N2 atmosphereAtmosphere (without carbon), and reductive atmosphereAtmosphere on blast furnace (BF) slag considering the phase changes, viscosityViscosity, meltingMelting temperatureTemperature, and slag structure. The results show that the viscosityViscosity and meltingMelting temperatureTemperature of the slag first increase and then decrease in a neutral atmosphereAtmosphere, and the turning point is 5wt%. The slag structure is somewhat complex and then simple. Under an N2 atmosphereAtmosphere (without carbon), slag viscosityViscosity and meltingMelting temperatureTemperature decrease first and then increase, and the turning point is 10wt%. This is because when the TiO2TiO2 content reaches10wt%, the slag begins to appear high meltingMelting point phase (TiN). The structure of slag tends to be complicated under a reducing atmosphereAtmosphere. The high meltingMelting point phases Ti (C, N) and TiN appear, which makes the slag viscosityViscosity and meltingMelting property.