Graphite mold, used for horizontal continuous casting. Continuous casting graphite refers to the graphite products used in the continuous casting mold. Metal continuous casting technology is a new technology that directly shapes molten metal through the continuous casting mold. Because it does not go through rolling but directly forms the material, it avoids the secondary heating of the metal, thus saving a large amount of energy.
Graphite crystallizer process:
It is made from carbon-based raw materials (petroleum coke, asphalt coke, coal tar pitch) through a series of production processes.
The molding process can be carried out using either cold compression molding or cold isostatic pressing molding techniques.
By adopting a more advanced high-tonnage cold isostatic pressing forming process, it is possible to ensure that the produced continuous casting graphite has uniform texture, high density and high strength.
Adding surface coating technology treatment can extend the service life of the graphite mold, improve the quality of the molten metal surface during continuous casting, and increase the speed of the continuous casting process.
Advantages of graphite material properties:
(1) Heat resistance
The melting point of graphite is 3850 ± 50℃. Even after being burned by an ultra-high temperature electric arc, the weight loss is very small and the thermal expansion coefficient is also very low. The strength of graphite increases with the rise in temperature. At 2000℃, the strength of graphite doubles.
(2) Conductivity, Thermal Conductivity
The electrical conductivity of graphite is 100 times higher than that of most non-metallic minerals. Its thermal conductivity exceeds that of metals such as steel, iron, and lead. The thermal conductivity decreases as the temperature rises, and even at high temperatures, graphite becomes an insulator. Graphite can conduct electricity because each carbon atom in graphite forms only 3 covalent bonds with other carbon atoms, and each carbon atom still retains one free electron to transfer electric charge.
(3) Lubricity
The lubrication performance of graphite depends on the size of the graphite flakes. The larger the flakes, the smaller the friction coefficient and the better the lubrication performance.
(4) Chemical Stability
Graphite exhibits excellent chemical stability at room temperature and is resistant to corrosion by acids, alkalis and organic solvents.
(5) Plasticity
Graphite has good toughness and can be ground into very thin sheets.
