Viscosity estimation model of fluorine-containing mold flux for continuous casting

A viscosity estimation model for fluorine-containing mold flux for continuous casting was investigated based on the Arrhenius formula and the rotating cylinder method combined with nonlinear regression analysis. This model is highly applicable and not limited by the slag of a certain composition. For most slag compositions, the viscosities estimated with this model deviated from the measured values by no more than 10%, which was in better agreement with the measured values than the viscosities estimated by the Riboud, Iida and Mills models. According to the model calculation and experimental detection, a viscosity isogram of CaF(2)-Na(2)O-Al(2)O(3)-CaO-SiO(2)-MgO slag was produced, and the mass fraction of CaF(2) in the low-viscosity zone was nearly 14%. An X-ray fluorescence spectrometric analysis of slag after the viscosity test showed that CaF(2) and Na(2)O were significantly reduced, and the measured viscosity was greater than the theoretical viscosity due to the volatilization.