Abstract
Determination of the physicochemical properties of solutions is important for industrial applications. Geometrical models, specifically the “mass triangle model” and a new model, have been utilized to calculate the viscosity and surface tension of CaO–SiO2–CaF2 slags based on the corresponding ternary system boundary data within the partially soluble region. The two models are validated with available experimental data in terms of viscosity and surface tension. Results reveal that the models are capable of estimating the physicochemical properties of the ternary system with limited solubility with high accuracy. The new model predicts the viscosity better, but the mass triangle model may perform better for the surface tension predictions. It is expected that these two solution models could be applied to the calculation of physicochemical properties of more ternary systems with limited solubility, especially when the systems are with high melting points or/and volatile components and/or easily oxidized or reduced components.