How graphite is used in the aluminium industry
Type of Product and application
Used in the production of aluminium billets, these rings are precision-machined to retrofit moulds for casting.
Applications: Metal casting (e.g. centrifugal casting, hot top casting)
Why graphite? High porosity and permeability, easy to machine, resistant to thermal shock
Components in systems used to degas (disperse) hydrogen from molten aluminium during the smelting process. This reduces the number of pores in the metal and ensures the surface is clear and smooth-looking.
Applications: Degassing systems
Why graphite? Resistant to extreme heat, resistant to oxidation, easy to machine
The process of creating and purifying aluminium involves heating graphite until the aluminium is flexible and then forcing it through a shaped opening in a die. An extrusion press is used to do this.
The extrusion press has a front and back plate made of layers of graphite sandwiched together with an epoxy resin. When the extruded aluminium comes out of the press, it is guided into the run-out table.
Applications: Extruded aluminium is used to make window frames and shutters, cables, electrodes, plastic injection moulding parts and so on.
Why graphite? Resistant to extreme heat, self-lubricating, non‑stick, high melting point