Review and modeling of viscosity of silicate melts: Part II. viscosity of melts containing iron oxide in the CaO-MgO-MnO-FeO-Fe2O3-SiO2 system

The viscosity of iron-containing silicate slags in the CaO-MgO-MnO-FeO-Fe2O3-SiO2 system has been reviewed by analyzing the available experimental data and the results of modeling studies. The model proposed by the present authors[1] for the calculation of viscosity of silicate melts has been found to provide a reasonably good description of the behavior of the viscosity of these melts with respect to both the change in silica content and the effect of different cations on viscosity. The results of the present model are compared with those of the Urbain model[2] and that proposed by Utigard and Warczok (the UW model).[3] The present model and the UW model gave a similar order of accuracy, while the results of the Urbain model tended to be higher than the experimental data for most systems examined. Although none of these models is capable of representing some peculiar behaviors, such as the peak observed around the fayalite composition in the FeO-SiO2 binary system and the isoviscosity contours found in the MnO-FeO-SiO2 system, they are considered to be very useful for representing the general behavior of viscosity in the systems studied.