Influence of TiO(2), Al(2)O(3), and Basicity on Viscosity and Structure of High Titanium-Bearing Blast Furnace Slag

The viscosity of high-titanium blast furnace slag with different TiO(2) content, Al(2)O(3) content, and basicity was measured at 1653–1773 K using the rotational cylinder method. The phase composition of the slag is measured by XRD. Phase diagram of the slags is calculated by FactSage software. Ionic network structure of the slags is analyzed by FT–IR. Results show that TiO(2) depolymerizes the silicate network structure, reducing viscosity at high temperature, while increasing Al(2)O(3) content generates a more complicated silicate, increasing viscosity. Basicity affects viscosity, with higher basicity resulting in lower viscosity above 1733 K. Perovskite significantly affects the viscosity of slag. This study provides an in-depth understanding of the relationship between the composition and viscosity of high-titanium blast furnace slag, which is very important for improving production efficiency.