Measurement of Transient Meniscus Flow in Steel Continuous Casters and Effect of Electromagnetic Braking

Seong Mook Cho, Hyoung Jun Lee, Seon Hyo Kim, Rajneesh Chaudhary, Brian G. Thomas, Duck Hee Lee, Yong Jin Kim, Woong Ryul Choi, Sung Kwang Kim, Hui Soo Kim

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Unstable meniscus flow leads to slab surface defects during continuous casting of steel, due to level fluctuations and vortex formation, which causes entrapment of argon bubbles and mold flux. Applying electromagnetic fields across the liquid steel pool, such as the "doubleruler" or "FC-mold" braking system, has been commercialized to stabilize meniscus flow. Plant measurements were performed using nail boards to quantify meniscus flow in a typical steel slab-casting mold with a slide gate system. The shape of the meniscus level, the surface velocity, and the direction of meniscus flow, are all quantified with time and location by analyzing the shape of the skull of solidified steel that encases each dipped nail. The results reveal interesting insights into time-variations of the flow pattern, which cannot and should not be detected with a standard mold-level sensor used for flow control. Further, the effect of applying the electromagnetic braking field on the flow pattern is revealed.

Original languageEnglish (US)
Title of host publicationSensors, Sampling, and Simulation for Process Control
PublisherJohn Wiley & Sons, Ltd.
Pages59-66
Number of pages8
ISBN (Print)9781118036181
DOIs
StatePublished - Apr 19 2011
Externally publishedYes

Keywords

  • Continuous casting
  • Embr
  • Flow control
  • Level sensor
  • Steel
  • Transient flow

ASJC Scopus subject areas

  • General Materials Science

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