graphite for continuous casting mold

Graphite for continuous casting mold refers to the graphite products used in continuous casting molds. Metal continuous casting technology is a new technology to directly form molten metal through continuous casting crystallizer. Because it is directly formed without rolling, it avoids secondary heating of the metal, so it can save a lot of energy.

Compared with graphite materials for other uses, continuous casting graphite is characterized by fine particles, uniform texture,high density, small porosity and high strength.

Recent years, advanced production methods such as direct continuous (or semi-continuous) manufacturing of rods or pipes from the molten metal state are being promoted at home and abroad. Domestic in copper, copper alloy, aluminum, aluminum alloy and other aspects have begun to use this method. Artificial graphite is considered to be the most suitable material for continuous casting or semi-continuous casting of non-ferrous metals. Production practice has proved that due to the use of graphite mold, due to its good thermal conductivity (thermal conductivity determines the solidification rate of metal or alloy), the self-lubrication performance of the mold is good and other factors, not only the casting speed is improved, but also because the size of the ingot is accurate, the surface is smooth, and the crystallization structure is uniform, it can be directly processed in the next process. This not only greatly improves the finished product rate, reduces the waste loss, and the product quality has also been greatly improved. There are two continuous casting methods: vertical continuous casting method and horizontal continuous casting method.

The coefficient of thermal expansion is an important factor in determining the use of graphite as a mold material. The graphite exhibits a low coefficient of thermal expansion that allows the mold to function without deformation or cracking. Another very important factor is self-lubrication. Graphite is a solid lubricant that creates low friction between the mold and the casting material. Subsequently, the casting can be extracted smoothly.

There are many factors that determine the life of a continuous casting graphite die. From the composition of the casting material, to the casting temperature, to the cooling rate, will affect the life of the graphite mold. The specific graphite grade used is also determined by a number of factors. The main factor is the material process field in which the mold to be cast is applied. For example, for gray cast iron or high nickel alloys, abrasion resistant graphite is needed, while for brass, relatively dense graphite would be a better choice.