The pre-baked anode is based on petroleum coke, pitch coke as the aggregate, coal, made of asphalt binder used for the pre-baked aluminum reduction cell anode material. This charcoal has been roasting , with a stable geometry, so also known as the pre-baked anode carbon block ,it is customary ,also known as aluminum with the carbon anode. Carbon anodes are essential to the production of aluminum ,as describe in " The Smelting Process" above.
Pre baked anode carbon block as anode material, plays a dual role of conductive and reduction. They are used in electrolysis cells. Anodes are consumed in the process of electrolysis and must be replaced every 20-30 days, depending on the size and cell design.