Scheduling model of steelmaking-continuous casting processes in special steel plants

A multi-objective scheduling model was developed to solve the steelmaking-continuous casting scheduling problem of a special steel plant.Static scheduling and dynamic scheduling were investigated in the solving process of the model.The production modes in static scheduling were classified and the corresponding solving methods were formulated in combination with the running principles of steelmaking workshops and on the basis of the operation cycles of steelmaking furnaces and casters,while time-adjusting methods based on scheduling rules were described for the process of dynamic scheduling.A case in a BOF special steel plant,in which three casters are producing at the same time,was used to test the methods,and the scheduling plans of three casts were calculated and compared with actual production data.The comparison result indicates the validity of the methods.