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

Research output: Contribution to journalArticleResearchpeer-review

External Organisational units

  • voestalpine Stahl Linz GmbH
  • K1-MET GmbH, Leoben
  • Christian-Doppler Lab for Metallurgical Applications of Magnetohydrodynamics


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.


Original languageEnglish
Article number119307
Number of pages14
JournalPowder Technology
Issue number1 February
Early online date19 Dec 2023
Publication statusPublished - 1 Feb 2024