# Numerical Simulation of Segregation in Slabs under Different Secondary Cooling Electromagnetic Stirring Modes

## TL;DR

This paper uses simulations to compare how different electromagnetic stirring methods affect the quality of steel slabs during casting.

## Contribution

The study introduces a 3D numerical model to analyze the impact of alternate versus continuous electromagnetic stirring on carbon segregation in steel slabs.

## Key findings

- Alternate stirring reduces central carbon segregation compared to continuous stirring.
- The alternate mode leads to more uniform flow fields and less variation in solidification endpoints.
- The central carbon segregation index dropped from 1.236 to 1.222 with alternate stirring.

## Abstract

Secondary cooling electromagnetic stirring (S-EMS) significantly impacts the internal quality of continuous casting slabs. In order to investigate the effects of S-EMS modes on segregation in slabs, a three-dimensional numerical model of the full-scale flow field, solidification, and mass transfer was established. A comparative analysis was conducted between continuous electromagnetic stirring and alternate stirring modes regarding their impacts on steel flow, solidification, and carbon segregation. The results indicated that adopting the alternate stirring mode was more advantageous for achieving uniform flow fields and reducing the disparity in solidification endpoints, thus mitigating carbon segregation. Specifically, the central carbon segregation index under continuous stirring at 320 A was 1.236, with an average of 1.247, while under alternate stirring, the central carbon segregation index decreased to 1.222 with an average of 1.227.