A Structurally-based Viscosity Model of the Fully Liquid Slags in the CaO-MgO-Al_2O_3-FeO-SiO_2 System

摘要

In order to extend the viscosity estimation of the CaO-MgO-Al_2O_3-FeO-SiO_2 system and provide new methods to establish the more comprehensive and high-precision viscosity model, a structurally-based viscosity model for fully liquid aluminosilicate slags was established for the CaO-MgO-Al_2O_3-FeO-SiO_2 system, and the results showed that the model could well link the slag viscosity to the internal structure of melts and the concentrations of components by determination of the integral activation energy of slag using the basic oxide, acidic oxide and electronegativity of structural units, the viscosity model showed overall superior performance for the CaO-MgO-Al_2O_3-FeO-SiO_2 system, with the mean deviation for the quinary system of 10.4%. Meanwhile, the viscosity model also had good forecast effect for the quaternary system, ternary system and binary system containing silicate or aluminates, with the mean deviation for the three systems of 14.1%, 11.8% and 12.8%, respectively. The new model was expected to be widely used for different systems containing silicate or aluminate.