Version 1
: Received: 20 January 2024 / Approved: 23 January 2024 / Online: 23 January 2024 (09:51:32 CET)
How to cite:
Fares, F.M.; Snani, L.; Benchikha, T. Study of the Clogging Phenomenon of Submerged Nozzles in Continuous Casting. Preprints2024, 2024011680. https://doi.org/10.20944/preprints202401.1680.v1
Fares, F.M.; Snani, L.; Benchikha, T. Study of the Clogging Phenomenon of Submerged Nozzles in Continuous Casting. Preprints 2024, 2024011680. https://doi.org/10.20944/preprints202401.1680.v1
Fares, F.M.; Snani, L.; Benchikha, T. Study of the Clogging Phenomenon of Submerged Nozzles in Continuous Casting. Preprints2024, 2024011680. https://doi.org/10.20944/preprints202401.1680.v1
APA Style
Fares, F.M., Snani, L., & Benchikha, T. (2024). Study of the Clogging Phenomenon of Submerged Nozzles in Continuous Casting. Preprints. https://doi.org/10.20944/preprints202401.1680.v1
Chicago/Turabian Style
Fares, F.M., Louafi Snani and Tahar Benchikha. 2024 "Study of the Clogging Phenomenon of Submerged Nozzles in Continuous Casting" Preprints. https://doi.org/10.20944/preprints202401.1680.v1
Abstract
The continuous casting nozzle which guides and protects the flow of liquid steel undergoes a progressive reduction in its internal diameter following the accumulation on the internal wall of non-metallic inclusions. This narrowing of the channel is due to a mechanical attachment (non-metallic inclusions) and this, because of the turbulent regime of the flow of the liquid steel. This phenomenon is very often associated with the casting of low carbon steels deoxidized exclusively with aluminium. Clogging generally leads to a slowing down of the casting speed and, in severe cases, to the total stoppage of the installation and consequently to the appearance in the slab of the defect called "resumption of casting or belt". The aim of this work is to determine the nature of the deposit and the blocking mechanism of the pouring nozzles. For that, a chemical analysis as well as tests concerning the adhesion of the deposit were carried out on samples taken from damaged pouring nozzles. We found that it was at a load of 187.5 kgf that the rupture of the sample took place, during the interfacial indentation tests, which represents a very high level of adhesion. On the other hand, chemical analysis by X-ray fluorescence of the deposits revealed a fairly high level of alumina (Al2O3 = 90%) which undoubtedly comes from inclusions resulting from the deoxidation of the metal. It can therefore be said that the clogging phenomenon is produced by a continuous attachment of non-metallic inclusions to the rough walls of the nozzle.
Chemistry and Materials Science, Physical Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
