Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Finite element analysis applied to redesign of submerged entry nozzles for steelmaking

Ewing, Helen and Hendry, Alan and Nash, David (2011) Finite element analysis applied to redesign of submerged entry nozzles for steelmaking. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 225 (4). pp. 327-339. ISSN 1464-4207

[img] PDF
Ewing_HC_Pure_FE_Analysis_applied_to_redesign_of_submerged_entry_nozzles_for_steelmaking_Mar_2011.pdf - Preprint

Download (795kB)

Abstract

The production of steel by continuous casting is facilitated by the use of refractory hollow-ware components. A critical component in this process is the submerged entry nozzle (SEN). The normal operating conditions of the SEN are arduous, involving large temperature gradients and exposure to mechanical forces arising from the flow of molten steel; experimental development of the components is challenging in so hazardous an environment. The effects of the thermal stress conditions in relation to a well-tried design were therefore simulated using a finite element analysis approach. It was concluded from analyses that failures of the type being experienced are caused by the large temperature gradient within the nozzle. The analyses pointed towards a supported shoulder area of the nozzle being most vulnerable to failure and practical in-service experience confirmed this. As a direct consequence of the investigation, design modifications, incorporating changes to both the internal geometry and to the nature of the intermediate support material, were implemented, thereby substantially reducing the stresses within the Al2O3/graphite ceramic liner. Industrial trials of this modified design established that the component reliability would be significantly improved and the design has now been implemented in series production.