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Graphite is a nonmetallic mineral with a wide variety of applications. It has many unique properties such as a low hardness, metallic lustre, high lubricity, refractoriness to high temperatures and electrical conductivity. It is widely used in metallurgy, aerospace, electronics and machinery industries.
Several graphite powders are available in the market. They can be classified into natural flake graphite and expandable graphite.
high purity graphite powder has excellent lubricity and anti-corrosion ability. It can be used to make steel lubricants and anti-corrosion coatings. It can also be mixed with oil to form a graphite lubricating film. It is especially useful in a number of applications such as automotive lubricants, machinery lubrication and aerospace.
Chemically stable graphite powder has good acid and alkali corrosion resistance, aqueous salt solution resistance and organic solvent resistance. It can also withstand thermal shock and sudden temperature changes.
Synthetic graphite is a high-purity, ultra-fine crystalline material that has been produced by the vaporization of volatile impurities at extremely high temperatures. It contains primarily metal oxides, sulfur, nitrogen and hydrogen.
In addition to its refractory properties, synthetic graphite has excellent mechanical strength and oxidation resistance. It is an ideal material for friction, foundry, electrical carbons, fuel cell bi-polar plates, coatings, electrolytic processes and other applications.
The development of a new chemical-free floatation technique is beneficial for the value enhancement of graphite, reduction of chemical cost involved in the conventional froth floatation techniques and environmental friendliness. This process also enhances the product’s physical and chemical properties such as its specific surface area, morphology and microstructure.
