2006 Volume 46 Issue 3 Pages 359-367
A structurally-based quasi-chemical viscosity model for fully liquid slags in the Al2O3–CaO–‘FeO’–MgO–SiO2 system has been developed. The model links the slag viscosities to the internal structures of the melts through the concentrations of various Si0.5O, Me2/nn+O and Me1/nn+Si0.25O viscous flow structural units. The concentrations of these structural units are derived from a quasi-chemical thermodynamic model of the system. The model described in this series of papers enables the viscosities of liquid slags to be predicted within experimental uncertainties over the whole range of temperatures and compositions in the Al2O3–CaO–MgO–SiO2 system.