High convection flow - improved performance in coil annealing

The annealing of the coil is a very important step during the production of aluminum alloy sheet metal. Coil annealing is performed between the various milling steps and after the final cold milling to achieve the desired material properties. Furthermore, during this annealing, the milling oil is removed from the strip surface by vaporization. If this vapor passes across metal at too high of a temperature, it may crack on the strip surface causing surface quality problems. Production demands require the heating and annealing process be carried out in a tightly controlled environment, eliminating any local overheating of the surface, and in as short a cycle as feasible.