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Title:Customization and control of metallurgical length during speed drop in continuous steel casting
Author(s):Patkar, Abhishek
Contributor(s):Bentsman, Joseph
Subject(s):CON1D
CONONLINE
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
Genre:Other
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100025
Date Available in IDEALS:2018-05-24


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