Graphite Mould

Why use graphite? Most people would recognize graphite as the black stuff in a pencil. The graphite for the GPM processes is of a premium grade with a medium grain and extremely low porosity. Manufacturers purchase graphite in billets or blocks. These are cut to size and precision machined to the dimensions required for the part to be cast. Graphite has many qualities that make it an ideal material for a mould. The material is extremely stable; it won’t warp, twist or check when metal is injected. It exhibits a lower coefficient of expansion and is used to carry the electricity that melts scrap iron and steel in electric arc furnaces. As an increasing proportion of global steel is made using electric arc furnaces, the secondary production of steel becomes the major consumption of graphite electrodes. Additionally, the graphite electrode is also used in melting products in smelting furnaces, non-ferrous metals, ceramic products, and even the waste recycling industry.

What Graphite Mould Category Do We Offer?

A specific application may require Graphite Mould in order to match the existing furnaces and reduce the overall melting cost. Generally, according to the using and type, Graphite can be divided into the following two categories:

Graphite CrucibleGraphite Crucible

The Graphite Crucibles can withstand high temperature and has good resistance to chemical erosion and thermal shock. Especially graphite crucible is ideal for the melting of aluminium, copper and other metals like gold and silver.

Graphite MouldGrapphite Mould

Graphite moulds are widely used in Brass continuous casting, Red copper continuous casting moulds, Continuous casting moulds for the jewellery of gold, silver, platinum, etc, and Steel and stainless steel continuous casting moulds.
The shape of the cast product is divided into round bar mould, hollow tube mould, and shaped mould.

How to Produce the Graphite Electrodes?

The mould is made from petroleum coke after it is mixed with coal tar pitch. They are then extruded and shaped, baked to carbonize the binder (pitch), and finally graphitized by heating it to temperatures approaching 3000 °C, at which the carbon atoms arrange into graphite. They can vary in size up to 11 ft. long and 30 in. in diameter.

Please Call HGraphite if you want a consultation on the most cost-efficient alternative.