Graphite Rotor and Shaft

Material Properties

By reducing frequent problems associated with hydrogen diffusion during smelting, graphite rotor and shafts' particular treatments and special material features make them extremely successful at preserving the quality of aluminium products.

Better Degassing Results

To aid in degassing, it is essential to agitate the molten aluminium and inject inert gases during the smelting process. Both intermittent and continuous online degassing techniques require this. Structural flaws in aluminium products may result from the presence of hydrogen, which is created by chemical interactions with steam. In order to eliminate these hydrogen inclusions and improve the finished castings' quality and structural integrity, graphite rotor and shaft assemblies are essential.

Flushing Gas Resistance

Because of its natural resistance to the several flushing gases used in the process, including argon, nitrogen, and chlorine, graphite is a perfect material for gas injection tubes, gas distribution systems, and degassing tubes. This resistance makes graphite rotor and shaft assemblies suitable for their intended use by guaranteeing their longevity and efficacy in demanding operating conditions.

Unique Properties of Graphite

Speciality graphite, which is renowned for its remarkable strength, high hardness, and superior heat resistance, is used to create graphite rotor and shaft assemblies. Additionally, this graphite has low porosity, which is essential for performance and longevity in corrosive and abrasive environments. These components' longevity and dependability are further increased by its anti-abrasion and anti-scour qualities.

Improved Efficiency with CVD Coating

Chemical Vapour Deposition (CVD) coating is used as a unique treatment to further enhance the capabilities of graphite rotor and shaft assemblies. In order to cover the graphite material's surface and fill its pores, anti-oxidants at the nanoscale are applied. The CVD coating adds an extra layer of protection that prolongs the life of the rotor and shaft by greatly enhancing the graphite's heat resistance, anti-oxidation, and anti-scour qualities. In order to ensure that the assemblies endure the demands of high-temperature smelting settings, the coating materials are selected based on their anti-oxidation, anti-corrosion, anti-scouring, and heat resistance properties.

Applications

Smelting of Aluminium and Aluminium Alloy

These assemblies are commonly used in the smelting of aluminium and its alloys because they make it easier to stir molten metal and inject inert gases to eliminate dissolved hydrogen. As a result, the quality of aluminium castings has significantly improved, with fewer internal flaws and better structural qualities.

Treatments for Gas Flushing

Gas flushing treatments, which are used to enhance the quality of aluminium melts, depend on graphite rotor and shaft assemblies. The assemblies can perform this duty well because of their resistance to aggressive flushing gases like argon, nitrogen, and chlorine. This ensures that the castings produced are of the highest quality and devoid of undesirable gas inclusions.

Resistance to Oxidation and Corrosion

The increased corrosion and oxidation resistance offered by the CVD coating makes graphite rotor and shaft assemblies appropriate for use in settings where chemical resistance is crucial, in addition to their primary usage in degassing. This expands their use beyond the smelting of aluminium to include additional corrosive and high-temperature applications.