The viscosity of molten SiO2-CaO-MgO-TiO2 slag was measured using a rotating cylinder method at the concentration of TiO2 0˜20 mass% at 1673 K. At SiO2:CaO:MgO=60:25:15, 55:30:15 and 50:35:15 (mass% ratio), the viscosity of molten SiO2-CaO-MgO-TiO2 slag decreased with increasing the concentration of TiO2. The experimental results were compared with the calculated results from Urbain′s model which reproduced well the present experimental values in molten SiO2-CaO-MgO-TiO2 slag.
