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SUBMERGED ENTRY NOZZLE CLOGGING DURING C

F. Tehovnik, J. Burja

2026encontinuous castingsteelnozzle cloggingalumina inclusionscalcium treatmentrefractory

Abstract

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Nozzle clogging is a common problem in the production of continuously cast Al-killed steels, characterized by the presence of solid inclusions in molten steel at casting temperatures. This study aims to examine the clogging occurrences associated with submerged entry nozzles (SENs) used for continuous casting of Al-killed low alloy steel grades, particularly those with increased sulfur content. A systematic analysis was conducted, focusing on the composition of deposits found in the SENs. The findings reveal that the deposits are predominantly alumina-based, accompanied by spinel and sulfur inclusions, as well as some entrapped steel melt. It was concluded that clogging initiates when the steel melt infiltrates the refractory material, subsequently removing the protective zirconia surface and facilitating the adhesion of fine solid aluminates which leads to deposit formation. The implications of these results underscore the importance of understanding inclusion behavior and reoxidation processes during continuous casting to enhance the operational efficiency and quality of Al-killed steel production.

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Cite This Work

@article{50135381-2cc8-4173-8031-01070c09c57b,
  title={SUBMERGED ENTRY NOZZLE CLOGGING DURING C},
  author={F. Tehovnik and J. Burja},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - SUBMERGED ENTRY NOZZLE CLOGGING DURING C
AU  - F. Tehovnik
AU  - J. Burja
PY  - 2026
LA  - en
ER  -

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