Abstract
A 3D mathematical model was developed to simulate the electromagnetic field in Φ600 mm round bloom continuous casting with final electromagnetic stirring (F-EMS), and the model was verified using measured data for the magnetic flux density in the stirrer centre. The distribution of electromagnetic force and the influence of current intensity and frequency were investigated. The results show that the Joule heat generated by F-EMS is very small and its influence on secondary cooling heat transfer in the stirring zone can be ignored. With an increase in current frequency, the electromagnetic force density at R/2 and R/3 of the Φ600 mm round bloom first increases and then decreases, reaching a maximum at 10 Hz.
Highlights
Continuous casting is a process generally used in steel production to make the molten steel solidified into a semi-finished billet, bloom, or slab for subsequent rolling in the finishing mills.Electromagnetic stirring (EMS) technology is widely used in the continuous casting production of steel.This technology utilises electromagnetic induction to provide a non-contact electromagnetic force to enhance the molten steel flow, heat transfer, and mass transfer and to promote columnar to equiaxed transition, thereby rectifying internal defects such as central segregation and shrinkage cavities [1].According to different installation positions, three types of EMS exist in continuous casting steel
One is situated at the caster mould, referred to as mould electromagnetic stirring (M-EMS); another is situated along the strand in the secondary cooling zone, called a strand electromagnetic stirring (S-EMS); the last one is situated near the solidification end of the strand, known as final electromagnetic stirring (F-EMS) [2]
This study aims to investigate the electromagnetic field in Φ600 mm mm round bloom continuous casting with numerical simulation,asaswell wellas asexamining examining the the round bloom continuous casting with by by numerical simulation, distribution features features of the electromagnetic force and the influence distribution influence of of current current intensity intensity and andfrequency
Summary
Continuous casting is a process generally used in steel production to make the molten steel solidified into a semi-finished billet, bloom, or slab for subsequent rolling in the finishing mills.Electromagnetic stirring (EMS) technology is widely used in the continuous casting production of steel.This technology utilises electromagnetic induction to provide a non-contact electromagnetic force to enhance the molten steel flow, heat transfer, and mass transfer and to promote columnar to equiaxed transition, thereby rectifying internal defects such as central segregation and shrinkage cavities [1].According to different installation positions, three types of EMS exist in continuous casting steel. Continuous casting is a process generally used in steel production to make the molten steel solidified into a semi-finished billet, bloom, or slab for subsequent rolling in the finishing mills. Electromagnetic stirring (EMS) technology is widely used in the continuous casting production of steel. This technology utilises electromagnetic induction to provide a non-contact electromagnetic force to enhance the molten steel flow, heat transfer, and mass transfer and to promote columnar to equiaxed transition, thereby rectifying internal defects such as central segregation and shrinkage cavities [1]. According to different installation positions, three types of EMS exist in continuous casting steel. M-EMS is used in almost all billet/bloom casters. For high-carbon steel or large-section strands, the use of M-EMS cannot completely improve the internal quality of the strand, and F-EMS is generally required [3], which can more effectively improve the central porosity and
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