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2022 | OriginalPaper | Chapter

Observation on Clogging Behavior of Submerged Entry Nozzle of Al–Killed Steels

Authors : Fenggang Liu, Qiuyue Zhou, Lifeng Zhang, Ying Ren

Published in: 12th International Symposium on High-Temperature Metallurgical Processing

Publisher: Springer International Publishing

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Abstract

To better understand the clogging mechanism of the submerged entry nozzle, clogging materials were analyzed using scanning electron microscopy and energy dispersive spectrometer. The clogging material was divided into several layers, including the alumina inclusion layer, solidified steel layer, and nozzle matrix layer. Due to the difference in the morphology and composition of oxides, observed clogging materials presented different morphologies. Steel droplets were observed at the interface between the nozzle and the clogging materials, indicating that insufficient preheating may lead to the solidification of the molten steel. Alumina inclusions were easy to adhere to the solidified steel layer, which was the starting of the nozzle clogging behavior. The alumina inclusions continuously collided and sintered, resulting in the formation of the alumina inclusion layer. Besides, the reoxidation might also lead to the clogging of the submerged entry nozzle of Al-killed steels.

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Metadata
Title
Observation on Clogging Behavior of Submerged Entry Nozzle of Al–Killed Steels
Authors
Fenggang Liu
Qiuyue Zhou
Lifeng Zhang
Ying Ren
Copyright Year
2022
DOI
https://doi.org/10.1007/978-3-030-92388-4_28

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