Abstract
To clarify the clogging and erosion process of the submerged entry nozzle under an electric field, a clearer and more intuitive understanding of the formation process of clogging and the erosion mode of the submerged entry nozzle were studied in this paper. The results showed that the electric current pulse applied on the submerged entry nozzle can effectively restrain erosion and maintain the integrity of the submerged entry nozzle. After electric current pulse treatment, the density of clogging is increased, and the boundary layer of clogging at different stages is clear. The clogging of the newly formed layer is more stable and can effectively resist erosion-flushing of molten steel. Meanwhile, the inclusion size in steel is refined, which is helpful for improving the quality of steel. Unfortunately, the inhibiting effect will also gradually weaken with increased thickness of the clogging during the electric current pulse treatment.
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