2019 Pittsburgh AISTech

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Performance Improvements of the Reheat Furnace Level 2 Control System at AM/NS Calvert LLC (Room 316)

AM/NS operates three walking beam reheat furnaces, originally installed by Tenova in 2010, to heat slabs for rolling into strip at its Calvert, Ala., USA, facility. AM/NS sought improvements in handling product transitions while still maintaining high production of quality product. In 2016, the level 2 system was upgraded to leverage improvements inherent in Tenova’s newest control algorithms and process model. This included the automation of special heating strategies to handle several new specialty products. Increased productivity, reduced variability in slab discharge temperatures, and reduced furnace energy consumption were realized. This paper discusses the upgrade project and resultant performance improvements.