What is the process of making aluminum coil?

The process of making aluminum coil involves several key steps. Initially, raw materials, typically bauxite ore, are mined and then refined to produce aluminum oxide. This aluminum oxide is then reduced to aluminum metal through the Hall-H茅roult process, where it is dissolved in molten cryolite and electrolyzed to extract aluminum. Once the aluminum is produced, it is melted and then continuously cast into large slabs or billets. These slabs are then hot or cold rolled to reduce their thickness and width, forming coils. The coils are annealed to improve their mechanical properties and surface finish. Finally, the aluminum coils are cleaned, inspected, and cut to size before being packaged and shipped to customers for various applications such as construction, automotive, and packaging.