Aluminum Coil Annealing Furnace using High Convection Vortex® Jet Airflow
SECO/WARWICK provides custom engineered aluminum annealing furnaces for coil and foil with capacities ranging from single coil modular furnaces to multi-zone furnaces with tight zone control. These units are used by aluminum manufacturers from around the world, North & South America, Europe, and Asia.
Using patented Vortex jet airflow technology, SECO/WARWICK’s Vortex® aluminum coils annealing system, combined with Bypass Cooler and SeCoilTM control and simulation software, provides coils producers the ability to significantly reduce the overall cycle time of their furnaces, resulting in energy savings, increased productivity, and improved surface quality. The key to the system is an increased heat transfer coefficient achieved by high-speed air impinging on both sides of the coil. The intent is to transfer heat through the coil’s edges as opposed to only through the outside layer of the coil.
The challenge in aluminum coil annealing furnace is to optimize the process by shortening the cycle time to the greatest extent possible, while maintaining the desired metallurgical properties over the entire load. The components used in SECO/WARWICK’s aluminum coil annealing furnace succeed in providing both greater efficiency and better quality
Vortex® Jet Heating System
The effective thermal conductivity in a strip coil is much lower in the radial direction than in the axial direction, therefore, the most effective way of heating the coil is through the edges of the coil layers.