Abstract：Viscosity of mold flux is an important property to evaluate the lubrication during the continuous casting of steel, and viscosity with proper value is the key to ensure uniform lubrication and heat transfer during continuous casting of steel.Based on the multiphase flow and enthalpy-porous media model, a two-dimensional transient model was established to study the infiltration of liquid flux into the mold-strand gap at the meniscus, and the effect of viscosity on the lubrication was discussed. The measurement shows that with 9% Al2O3 addition into mold flux designed especially for the continuous casting of ultra-low carbon steel, the viscosity of mold flux at 1 300 ℃ was increased, and the trend of the viscosity as a function of temperature indicated that the mold flux gradually transformed from crystal to glass type. The prediction shows that as the viscosity increased, the flow speed of liquid flux at meniscus was attenuated, the liquid film thickness and flux consumption were decreased. Moreover, the fluctuation of inflow and the thickness of liquid film varied with no obvious periodic change during the oscillation cycle.
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LU Chun-xiao, MAO Yu-min, ZHANG Xu-bin, WANG Qiang-qiang, WANG Qian. Effect of viscosity of mold flux on infiltration in steel continuous casting by numerical simulation. CONTINUOUS CASTING, 2021, 40(2): 43-47.
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