About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
12th International Symposium on High Temperature Metallurgical Processing
|
Presentation Title |
Observation on Clogging Behavior of Submerged Entry Nozzle of Al-killed Steels |
Author(s) |
Fenggang Liu, Qiuyue Zhou, Lifeng Zhang, Ying Ren |
On-Site Speaker (Planned) |
Lifeng Zhang |
Abstract Scope |
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 was also am important reason for the clogging of the submerged entry nozzle of Al-killed steels. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Other, Other |