An Approach for Modelling Slag Infiltration and Heat Transfer in Continuous Casting Mold for High Mn–High Al Steel

Abstract

To clarify the characteristics of slag infiltration and heat transfer behaviors in the meniscus region during the casting of high Mn–high Al steel, a mathematical model of a continuous casting mold that couples fluid flow with heat transfer, and solidification is developed. The model is based on the change in slag composition and properties caused by the steel/slag reaction. The formation and evolution of the meniscus profile and slag films for different mold fluxes during mold oscillation are described. The results show that the rapid growth of the slag rim with a high Al2O3 content approaches and deforms the meniscus so that a series of casting problems such as slag infiltration blocking, large fluctuations in heat flux, and even meniscus breaking occur in the continuous casting process. Predictions are in good agreement with plant measurements. These findings provide an improved understanding of the complex phenomena occurring in the meniscus region and give new insights into the evaluation and optimization of mold flux properties for high Mn–high Al steel casting.

Characterization and Assessment of Mold Flux for Continuous Casting of Liquid Steel Using an Inverse Mold Simulator

“…Various developments and modifications are proposed by researchers [29][30][31][32][33] for the inverse heat conduction problem. Despite various numerical analyses conducted by the researchers [34][35][36] to understand the phenomena involved in the continuous casting process, estimation of heat flux based on the inverse heat conduction problem is more popular. The model based on the Fourier equation adopted in this investigation calculates the surface temperature at the hot surface of Cu mold and transient heat flux.…”

Melting and Flowing Behavior of Mold Flux in a Continuous Casting Billet Mold for Ultra-High Speed

“…The variables are explained in the list of nomenclature at the end of the paper. Full details of the mathematical model have been published in our previous works [18,19].…”

A mathematical mould model for transient infiltration and lubrication behaviour of slag in a steel continuous casting process

“…The slag plays an important role in continuous casting by providing effective heat insulation (Yang et al, 2020) and lubrication (Zhang et al, 2018;Yan et al, 2019), preventing secondary oxidation of molten steel and improving heat transfer within the mould. Liquid slag infiltrates from the slag pool into the gap between the shell and mould wall, forming a slag film that is conducive to lubrication and prevents the shell from sticking to the mould wall.…”