Abstract
A structurally based viscosity model for fully liquid silicate slags has been proposed and applied to the Al2O3-CaO-‘FeO’-SiO2 system at metallic iron saturation. The model links the slag viscosity to the internal structure of melts through the concentrations of various anion/cation structural units (SUs). The concentrations of structural units are equivalent to the second nearest neighbor bond concentrations calculated by the quasi-chemical thermodynamic model. This viscosity model describes experimental data over the entire temperature and composition range within the Al2O3-CaO-‘FeO’-SiO2 system at metallic iron saturation and can be extended to other industrial slag systems.
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