TY - JOUR

T1 - Numerical modeling of clog fragmentation during SEN clogging in steel continuous casting

AU - Barati, Hadi

AU - Wu, Menghuai

AU - Ilie, Sergiu

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 Cen- ter 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 Fed- eral 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 (Mon- tanuniversit¨at Leoben and Johannes Kepler University Linz) and in- dustrial partners (voestalpine Stahl Linz GmbH, voestalpine Stahl Donawitz GmbH, and RHI Magnesita GmbH). The authors also thank voestalpine Stahl Linz GmbH for providing topography of the as-clogged SEN. Publisher Copyright: © 2023 Elsevier B.V.

PY - 2024/2/1

Y1 - 2024/2/1

N2 - In the study of clogging during steel continuous casting, less attention was paid to the clog fragmentation, although it always accompanies the clogging process. This paper introduces a sub-model for the clog fragmentation integrated into a comprehensive transient clogging model. In this sub-model, the intricate network of the clog is simplified as a bunch of fictitious cylinders. Each cylinder, called ‘clog finger’, contains a column of spherical non-metallic inclusions (NMIs), which are mechanically bound by sintering at contact points. The mechanical stress acting at the sintering neck between NMIs due to hydraulic forces of the melt flow is evaluated. Simulation of clogging/fragmentation in a real-scale SEN was conducted using the integrated clogging model. Comparing the simulation results with the as-clogged SEN observed in steel plants revealed a qualitative agreement. The effects of different parameters were discussed. The importance of the fragmentation and necessity to have such a sub-model were affirmed.

AB - In the study of clogging during steel continuous casting, less attention was paid to the clog fragmentation, although it always accompanies the clogging process. This paper introduces a sub-model for the clog fragmentation integrated into a comprehensive transient clogging model. In this sub-model, the intricate network of the clog is simplified as a bunch of fictitious cylinders. Each cylinder, called ‘clog finger’, contains a column of spherical non-metallic inclusions (NMIs), which are mechanically bound by sintering at contact points. The mechanical stress acting at the sintering neck between NMIs due to hydraulic forces of the melt flow is evaluated. Simulation of clogging/fragmentation in a real-scale SEN was conducted using the integrated clogging model. Comparing the simulation results with the as-clogged SEN observed in steel plants revealed a qualitative agreement. The effects of different parameters were discussed. The importance of the fragmentation and necessity to have such a sub-model were affirmed.

KW - Clogging

KW - Continuous casting

KW - Non-metallic inclusions

KW - Fragmentation

KW - Detachment

UR - http://www.scopus.com/inward/record.url?scp=85180371580&partnerID=8YFLogxK

U2 - 10.1016/j.powtec.2023.119307

DO - 10.1016/j.powtec.2023.119307

M3 - Article

VL - 434.2024

JO - Powder Technology

JF - Powder Technology

SN - 0032-5910

IS - 1 February

M1 - 119307

ER -