Evaluation of the influence of the time-varying electromagnetic component in M-EMS on flow at the free surface

Shoji Satou, Keisuke Fujisaki

Research output: Contribution to journalArticlepeer-review

Abstract

In the continuous casting process, the surface quality of the steel is as important as its productivity. The surface quality is mostly decided in the molten metal flow during the initial solidification stage, which progresses at the free surface of the molten steel. To improve the surface quality, this flow must be controlled. M-EMS generates a time-varying electromagnetic force, which helps to control the shape of the free surface. In this paper, we evaluate the possibility of controlling the flow at the free surface by MHD calculations. The results show a slight possibility for the flow at the free surface to be controlled. Although the free surface variation in a pulsed EMC process, which controls the shape of the free surface using the time-varying electromagnetic force component, depends on electromagnetic force, the time-varying component in the M-EMS depends on the velocity of the molten metal. Since there is a first-order lag between the electromagnetic force and this velocity, free surface variation in M-EMS does not linearly depend on the time-varying electromagnetic component.

Original languageEnglish
Pages (from-to)62-68
Number of pages7
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume177
Issue number3
DOIs
Publication statusPublished - 2011 Nov 30

Keywords

  • continuous casting
  • electromagnetic stirring
  • magnetohydrodynamic calculation
  • time variation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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