EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Continuous casting is nowadays the world leading technology for the steel production. The thin slab casting (TSC) is featured by a slab shape close to the final products, which are casted at a high speed with the fast solidification rate. The quality of the thin slabs strongly depends on the uniformity of the turbulent flow, the super-heat distribution, and the growth of the solidified shell after the hot steel is fed into a funnel-shaped mold via a submerged entry nozzle (SEN). Here the solidification during TSC is modeled including the effects of the turbulent flow. These effects are considered with and without the applied electromagnetic brake (EMBr), which is simulated using an magnetohydrodynamics (MHD) model, developed as an in-house code within the open-source CFD package OpenFOAM®. In the current study, based on the presented numerical studies and the experimental results published elsewhere, we briefly review and summarize the following: (i) the alternation of the initial flow pattern and the calmness of the meniscus with the magnetic field growth; (ii) possibility to control the asymmetric melt flow due to the SEN clogging by employing the EMBr; (iii) influence of the applied magnetic field on the local remelting of the solidifying shell. The origins of the described phenomena are disclosed by a detailed analysis of the induced electric current density distribution and its closure through the liquid bulk and the highly conductive solid shell. The braking and accelerating action of the Lorentz force is discussed.