A Model For Estimating The Viscosity Of Molten Aluminosilicate Containing Calcium Fluoride

摘要

A model to estimate the viscosity of aluminosilicate melts including alkali oxides, as derived in our previous study, was extended to molten slag systems containing CaF_2. The bonding state of oxygen in molten silicate and the flow mechanism of melts with a network microstructure were considered for this model. To evaluate the bonding states of oxygen for given chemical compositions, a model proposed by Susa ef al. was applied. Their model is easily extended to any multi-component molten slag system without the need to consider thermodynamic parameters. In this work, the above-mentioned viscosity model was applied to evaluate the effect of CaF_2 on the viscosity of molten SiO_2-CaO-CaF_2, SiO_2-CaO-Al_2O_3-CaF_2 and SiO_2-Al_2O_3-CaO-CaF_2-Na_2O-MgO systems.