How is made?

Raw Material Preparation

Graphite components are usually made from raw materials such as petroleum coke, needle coke, and coal tar pitch. These materials first need to undergo crushing treatment and blending to ensure a uniform particle size distribution.

​

Grinding

The blocky petroleum coke and needle coke are subjected to medium crushing, grinding, and screening treatment to obtain fine-grained powders.

Molding

The ground powder is mixed with a binder and formed into the desired shape through methods such as cold isostatic pressing, extrusion, or molding, resulting in "green" materials, which are the prototypes of graphite products.

​

Carbonization

The molded "green" materials are carbonized in an oxygen-free environment at about 1000°C to form binder bridges and enhance the structural integrity of the material.

​

Graphitization

The carbonized materials are heated to about 3000°C in an inert atmosphere to transform amorphous carbon into a three-dimensional ordered graphite structure.

Secondary Grinding and Isostatic Pressing

The graphite material after preliminary shaping and heat treatment may need further grinding, followed by isostatic pressing to ensure uniform distribution and alignment of graphite particles.

​

Processing and Shaping

The graphitized material is processed into final product shapes such as tubes, rods, or plates through techniques such as extrusion, compression molding, or isostatic pressing.

​

Purification and Surface Treatment

For high-purity applications, such as the semiconductor industry, graphite is purified through chemical methods and may undergo surface treatment to achieve specific surface effects.

​

Final Inspection and Shipping

After all processing steps are completed, the graphite products are inspected for quality and then prepared for shipping to customers.