A Passive Approach to Butt Swell Management

会议论文
发表日期：

2024年

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S. R. Wagstaff,
R. B. Wagstaff,
B. Opdendries,
A. Anestis,
S. Pinis,
G. Pashos,
E. Xenos,
A. Mavroudis

摘要

The thickening of the base of rolling slab ingots is colloquially known as butt swellButt Swell. Because traditional DC castingDC Casting systems are vertical and not truly continuous, this remains one of the remaining sectors of recoveryRecovery loss in the casthouse and at the scalper. Butt swellButt Swell is currently managed by using dynamic molds which adjust the mold bore as a function of castingCasting recipe to deliver flat ingot profiles. In this paper, we analyze the metallurgical origin of butt swellButt Swell in the DC castingDC Casting process. Based on this analysis, a novel bottom blockBottom Block design is proposed which reduces the extent of the butt swellButt Swell in the start-upStart-Up regime of castingCasting. Experimental results are reported in comparisonComparison to a standard reference case demonstrating a reduction in butt swellButt Swell. Subsequent rolling trials also indicate additional scrap reduction in the flat rolling process.