Files in this item



application/pdfECE499-Sp2018-patkar.pdf (3MB)Restricted to U of Illinois
(no description provided)PDF


Title:Customization and control of metallurgical length during speed drop in continuous steel casting
Author(s):Patkar, Abhishek
Contributor(s):Bentsman, Joseph
Metallurgical Length
Abstract:Continuous steel casting is widely used to manufacture steel. Metallurgical length is a process variable that plays an important role in determining the final product quality. In the first part of this thesis, CON1D, a simple but comprehensive heat transfer and solidification model and CONONLINE, a real-time dynamic version based on the CON1D model are introduced. Based on real-time caster data available, CON1D is validated at medium slab caster at Nucor Tuscaloosa. The use of CON1D to customize CONONLINE is demonstrated. Lastly, CONONLINE (off-line version) is shown to successfully distinguish between a whale and a no-whale situation. In the second half of this thesis, the use of spray table control and two-step bang-bang control to minimize metallurgical length deviation during a sudden speed drop at a thin slab caster is studied. The two-step bang-bang control method performs better in terms of controlling the metallurgical length than the widely used spray table control method. The maximum metallurgical length deviation under two-step bang-bang control is 0.36 m while that under spray table control is 0.44 m. However, the rises in the surface temperature for the two-step bang-bang control are more abrupt than those for the surface temperature under spray table control.
Issue Date:2018-05
Date Available in IDEALS:2018-05-24

This item appears in the following Collection(s)

Item Statistics