Surface Tension Calculation of Molten Slag in SiO₂–Al₂O₃–CaO–MgO Systems Based on a Statistical Modelling Approach

Abstract

A calculation model of surface tension for molten slags in SiO₂–Al₂O₃–CaO–MgO systems has been developed in the present study, based on a statistical modelling approach. A total of 832 experimental data of slags have been critically selected and used for the optimization of model parameters, and the present model has a fairly lower average deviation with 4.60% within the applicable composition and temperature ranges. And also, the composition and temperature dependences of surface tension have been discussed using the model. The results indicate that the surface tensions always decrease with increasing SiO₂ content and increase with increasing MgO content. The surface tension will decrease with increasing temperature.