In steel production, slab workshops are essential to maintain a smooth flow between the steelmaking
workshop, where slabs are cast, and the hot rolling mill, where they are transformed
into coils. Before rolling, slabs must be treated to be conform with expected characteristics.
These treatments mainly involve "Full-face" and "U-shape" operations, depending on the type
of defect.
At the ArcelorMittal Fos-sur-Mer site, these operations take place in two dedicated workshops:
a scarfing hall, where defects are removed with torches, and a grinding hall, where
mechanical corrections are applied. Coordinating these operations is critical, as delays or
inefficiencies quickly propagate upstream and downstream.
In this work, we develop an optimization model to support the planning and scheduling
of slab-cleaning operations while respecting industrial constraints specific to the Fos-sur-Mer
workshops.