TY - CONF

T1 - Transient simulation of melt flow, clogging, and clog fragmentation inside SEN during steel continuous casting

AU - Barati, Hadi

AU - Wu, Menghuai

AU - Kharicha, Abdellah

AU - Ludwig, Andreas

N1 - The authors gratefully acknowledge the funding support of K1‐MET GmbH, metallurgical competence center. 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).

PY - 2023

Y1 - 2023

N2 - Clogging of submerged entry nozzle (SEN) during continuous casting of steel is anundesirable phenomenon leading to different problems like flow blockage, slag entrainment,nonuniform solidification, etc. A transient numerical model for nozzle clogging based on anEulerian-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 clogby 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 industrialscale 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 flowphenomenon in the mold region, i.e. the transition from the stable to an unstable and non-symmetrical flow.

AB - Clogging of submerged entry nozzle (SEN) during continuous casting of steel is anundesirable phenomenon leading to different problems like flow blockage, slag entrainment,nonuniform solidification, etc. A transient numerical model for nozzle clogging based on anEulerian-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 clogby 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 industrialscale 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 flowphenomenon in the mold region, i.e. the transition from the stable to an unstable and non-symmetrical flow.

KW - Transient simulation

KW - clogging

KW - clog fragmentation

KW - SEN

KW - steel continuous casting

U2 - 10.1088/1757-899X/1281/1/012025

DO - 10.1088/1757-899X/1281/1/012025

M3 - Paper

T2 - MCWASP XVI IOP Conf. Series: Materials Science and Engineering

Y2 - 18 June 2023 through 23 June 2023

ER -