Theoretical study on the separation of inclusion particles by pinch force from liquid steel flowing in a circular pipe

Shoji Taniguchi, J. Keith Brimacombe

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The pinch force which is one of the most general electromagnetic forces in the metallurgical field can be generated by impressing an electrical current in a liquid metal. In this force field, electrically nonconductive particles suspended in a liquid metal will receive a force in the opposite direction to the pinch force, and be squeezed out from the liquid metal. In the present study, this principle was applied to the separation of nonmetallic inclusion particles from liquid steel. The separation efficiency η of inclusion particles from a circular pipe flow of liquid steel was thought to be a function of the following nondimensional parameters: VR(= VPt/Wm), C1(= μeIrms2/ρv2), DR(= dp/2r1), Re = (r1wm/v), Z = (z/r1), and r1/δ. The plug-flow model and the particle-trajectory model were used for calculating η. The results obtained by both models showed that η was a function of VR, (C1DR2/Re)Z and r1/δ. The particle-trajectory model showed a smaller value of η than the plug-flow model. The value of η calculated by the former model increased with increasing (C1DR2/Re)Z and decreased with increasing VR. Although η did not change with r1/δ when r1/δ<1, it decreased gradually with increasing r1/δ in the region of r1/δ>1. The values of η for a channel induction heater installed in a continuous casting tundish were estimated to discuss the practicability of the present inclusion separator. It was found that η was greater than 95% for inclusion particles with the diameter greater than 60μm.

Original languageEnglish
Pages (from-to)24-29
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume80
Issue number1
DOIs
Publication statusPublished - 1994

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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