Induction Heating Features in Electrical Steel Hot Rolling Mills

Induction heaters in steel hot rolling mills can be used most efficiently in combination with gas furnaces. Such approach is economically profitable; it reduces the cost of metal heating with a significant reduction in scaling and decarburization, improves the gas furnace servicing conditions, and reduces carbon emissions. At the same time, induction heaters have proven themselves as effective inertia-free temperature controllers in conventional steel hot rolling lines, ensuring better quality of rolled products and creating prerequisites for the development of new technologies for producing electrical steel in these mills. The three previously formulated tasks of rolled strip heating before the finishing stands, namely, raising the average temperature, heating the edges, and eliminating the temperature difference along the strip length, are solved by using various types of inductors with their being appropriately placed on the mill to ensure maximum quality of rolled products with minimal costs for mill refurbishment. When implementing a set of works on modernizing a rolling mill, it is necessary to use digital twins of induction heaters during their design, control, operation and integration into the overall mill control system.