Various characteristics of flake graphite


Flake graphite has strong thermal shock resistance and good corrosion resistance. It is the main carbon raw material used in carbon-bonded refractories. It has an important influence on the corrosion resistance and high temperature strength of carbon-bonded refractories such as magnesia-carbon bricks. In the actual production process, carbon-bonded refractories have strict requirements on the purity, ash content, particle size and shape of flake graphite, and the amount of addition.
A large number of studies have shown that the purity of graphite is directly related to the high-temperature flexural strength of magnesia-carbon bricks and the rate of melt loss during use.

Obviously, the greater the ash content of graphite, the lower the purity of graphite. The ash content of graphite is mainly composed of SiO2-Al2O3-Fe2O3-CaO and so on. Generally speaking, if the content of Al2O3 is high and other impurities are small, the ash refractoriness is high (about 1500~1600℃); if the content of Al2O3 is low and other impurities are high, the refractoriness is low (about 1250℃).

Flake graphite is natural eutectic graphite, its shape is like fish phosphorus, belongs to hexahedral crystal system .With advantage of flake crystalline integrity, thin film ,toughness, floatability, lubricity and plasticity, Natural flake graphite is more superior than other graphite .

Spec of Natural flake graphite

Model

Size

Fixed carbon

Ash

V.M

Moisture

XT-280

200 Mesh

80%min

17-17.3%max

2.7-3.0%max

1%Max

XT-325

325 Mesh

90%min

8.0-8.0%max

1.8-2.0%max

 1%Max 

 

Note: Specifications and size can be adjusted according to user requirements


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