Viscosity of CaO?MgO?Al2O3?SiO2 melts containing SiC particles

摘要

The influence of SiC particle on viscosity of CaO?MgO?Al2O3?SiO2 melts was investigated by the rotating-cylinder method. It was found that temperature dependence of viscosity could be described by the Arrhenius law for systems with or without SiC particle addition. The activation energies of liquid?solid mixtures were mainly determined by liquid phase. Temperature had little influence on the relative viscosity (defined as the viscosity ratio of solid?liquid mixture to pure liquid). Viscosity and relative viscosity increased as decreasing rotation speed and increasing volume fraction of SiC solid particle. For the same volume fraction of SiC particle, relative viscosity was affected by the liquid slag compositions. The relative viscosity was smaller when composition of liquid slag had a larger CaO/SiO2 ratio or MgO/Al2O3 ratio. Meanwhile, it was found that the smaller SiC particle will lead to a larger relative viscosity.