Abstract
The thin slab casting (TSC) of steel is a type of the continuous casting (CC) with a
narrow funnel-shaped mold, characterized by the rapid solidification and fast production rates.
A highly turbulent flow impacts on a growing solid shell due to the constant feeding of the fresh
hot melt. That strongly affects the solidification profiles and final quality of the TSC slabs. The
presented work numerically investigates the solidification inside the TSC mold with the
asymmetric flow pattern caused by the misalignment (tilting) of the submerged entry nozzle
(SEN). These effects were considered with and without the applied electromagnetic brake
(EMBr). The influence of the adjustable EMBr on the asymmetric flow and solidification profiles
including turbulent and magnetohydrodynamic (MHD) effects were studied. During consistent
series of simulations, the EMBr was varied between the magnetic poles and the time-averaged
velocity and temperature fields were collected. The results showed that symmetric EMBr of a
local type could partially improve the asymmetry. An optimal braking scenario was found for
the casing speed of 5.5 m/min and maximum EMBr value of 180 mT. The solidification and
MHD models including turbulence were developed using OpenFOAM®.
narrow funnel-shaped mold, characterized by the rapid solidification and fast production rates.
A highly turbulent flow impacts on a growing solid shell due to the constant feeding of the fresh
hot melt. That strongly affects the solidification profiles and final quality of the TSC slabs. The
presented work numerically investigates the solidification inside the TSC mold with the
asymmetric flow pattern caused by the misalignment (tilting) of the submerged entry nozzle
(SEN). These effects were considered with and without the applied electromagnetic brake
(EMBr). The influence of the adjustable EMBr on the asymmetric flow and solidification profiles
including turbulent and magnetohydrodynamic (MHD) effects were studied. During consistent
series of simulations, the EMBr was varied between the magnetic poles and the time-averaged
velocity and temperature fields were collected. The results showed that symmetric EMBr of a
local type could partially improve the asymmetry. An optimal braking scenario was found for
the casing speed of 5.5 m/min and maximum EMBr value of 180 mT. The solidification and
MHD models including turbulence were developed using OpenFOAM®.
| Original language | English |
|---|---|
| Number of pages | 8 |
| DOIs | |
| Publication status | Published - 2023 |
| Event | MCWASP XVI IOP Conf. Series: Materials Science and Engineering - Duration: 18 Jun 2023 → 23 Jun 2023 |
Conference
| Conference | MCWASP XVI IOP Conf. Series: Materials Science and Engineering |
|---|---|
| Period | 18/06/23 → 23/06/23 |
Bibliographical note
The authors acknowledge the financial support by the Austrian Federal Ministry of Economy, Familyand Youth and the National Foundation for Research, Technology and Development within the
framework of the Christian Doppler Laboratory for Metallurgical Applications of
Magnetohydrodynamics.
Keywords
- EMBr
- asymmetric flow
- thin slab caster
- misaligned SEN