Article ID: ISIJINT-2024-148
The effect of MgO/CaO ratio on the viscosity and free running temperature of chromium-containing high-titanium blast furnace slag (CaO-SiO2-Al2O3-MgO-TiO2-Cr2O3) was investigated by a rotating crucible viscometer. When the ternary basicity with a fixed (CaO+MgO)/SiO2 ratio of 1.41 and the temperature was fixed, the MgO/CaO ratio had an obvious influence on the viscosity of slags. Increasing MgO/CaO ratio from 0.34 to 0.44 caused a slight decrease in the viscosity of the slag, and had an opposite effect when MgO/CaO ratio was more than 0.44. The XRD measurements showed that the technology of ‘‘replacing CaO with MgO'' has an effect on the precipitation temperature of perovskite phase and spinel phase. Accroding to the Raman spectroscopy results, with the increase of MgO/CaO ratio from 0.34 to 0.44, the DOP decreased, and then increased as the MgO/CaO ratio increased from 0.44 to 0.56.
