Abstract
Clogging of submerged entry nozzle (SEN) during continuous casting of steel is an
undesirable phenomenon leading to different problems like flow blockage, slag entrainment,
nonuniform solidification, etc. A transient numerical model for nozzle clogging based on an
Eulerian-Lagrangian approach was developed and it covers the main steps of clogging: (a)
formation of the first oxide layer by chemical reactions on the steel-refractory interface; (b)
motion of non-metallic inclusions (NMIs) due to the turbulent melt flow towards the SEN wall;
(c) interactions between the melt, the NMI, and the wall; (d) formation and growth of the clog
by the deposition of NMIs on the clog front and the flow-clog interactions; and (e)
detachment/fragmentation of a part of clog due to the flow drag force. Clogging in an industrial
scale SEN was simulated. The simulated clog front was compared with real as-clogged SENs.
The modeling results have successfully explained the SEN clogging induced transient flow
phenomenon in the mold region, i.e. the transition from the stable to an unstable and non-
symmetrical flow.
undesirable phenomenon leading to different problems like flow blockage, slag entrainment,
nonuniform solidification, etc. A transient numerical model for nozzle clogging based on an
Eulerian-Lagrangian approach was developed and it covers the main steps of clogging: (a)
formation of the first oxide layer by chemical reactions on the steel-refractory interface; (b)
motion of non-metallic inclusions (NMIs) due to the turbulent melt flow towards the SEN wall;
(c) interactions between the melt, the NMI, and the wall; (d) formation and growth of the clog
by the deposition of NMIs on the clog front and the flow-clog interactions; and (e)
detachment/fragmentation of a part of clog due to the flow drag force. Clogging in an industrial
scale SEN was simulated. The simulated clog front was compared with real as-clogged SENs.
The modeling results have successfully explained the SEN clogging induced transient flow
phenomenon in the mold region, i.e. the transition from the stable to an unstable and non-
symmetrical flow.
| Original language | English |
|---|---|
| Number of pages | 9 |
| DOIs | |
| Publication status | Published - 2023 |
| Event | MCWASP XVI IOP Conf. Series: Materials Science and Engineering - Duration: 18 Jun 2023 → 23 Jun 2023 |
Conference
| Conference | MCWASP XVI IOP Conf. Series: Materials Science and Engineering |
|---|---|
| Period | 18/06/23 → 23/06/23 |
Bibliographical note
The authors gratefully acknowledge the funding support of K1‐MET GmbH, metallurgical competencecenter. The research program of the K1‐MET competence center is supported by COMET (Competence
Center for Excellent Technologies), the Austrian program for competence centers. COMET is funded
by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation, and
Technology; the Federal Ministry for Digital and Economic Affairs; the Federal States of Upper Austria,
Tyrol, and Styria; and the Styrian Business Promotion Agency (SFG). In addition to the public funding
from COMET, this research project was partially financed by scientific partners (Montanuniversität
Leoben and Johannes Kepler University Linz) and industrial partners (voestalpine Stahl Linz GmbH,
voestalpine Stahl Donawitz GmbH, and RHI Magnesita GmbH).
Keywords
- Transient simulation
- clogging
- clog fragmentation
- SEN
- steel continuous casting