The market trend of fine processing of natural flake graphite

The market orientation on fine processed natural flake graphite materials is mainly in new technology fields such as energy, environmental protection, information, transportation, and national defense. Such as electrode materials for batteries, coating materials for electronic information equipment, stealth materials for military equipment, etc. The market for fine graphite processing materials should gradually move from the domestic market to the international market and form its brand. At present, a few products have occupied a certain share in the international market, such as flexible graphite plate and strip, but they have not formed a loud brand.

The technology of processing graphite materials from graphite raw materials is mainly in terms of purity, particle size, and modification. In terms of purity, high purity is usually required. For example, in the “new materials and new materials industry definition standard” of the Ministry of Science and Technology (lecture draft), for high-purity graphite materials, for natural graphite materials, flake graphite is C > = 99.9%, while microcrystalline graphite is 99%. The particle size includes particle size, particle size distribution, and particle shape. For example, the graphite negative electrode material of lithium-ion batteries shall be spherical particles as far as possible.

The modification of natural flake graphite refers to the physical or chemical treatment to make the graphite obtain new properties or achieve the desired properties. For example, the surface of graphite powder is coated with a layer of amorphous carbon by physical and chemical methods, so it has excellent negative performance of the lithium-ion battery. Among the modification technologies, graphite interlayer compounds (GICs) technology is a unique technology for graphite modification. Taking advantage of the weak interlayer adhesion of graphite crystal, different ions, atoms, and molecules are mixed between the network planes of carbon atoms of graphite to form various interlayer compounds, to obtain some products with special properties. Examples are graphite fluoride, some stealth materials in the military, etc. Flexible graphite is a strip and other profiles that change powdery flake graphite into pure graphite by GICs technology.

The development of graphite materials will also put forward new requirements for the traditional technology of the graphite industry. For example, flexible graphite is used as the bipolar plate of the fuel cell, which has good performance. Once the fuel cell is commercialized, the demand for flexible graphite will exceed the demand for seals. Flexible graphite can only use large flake graphite with more than 80 mesh as raw material, and the proportion of large flake in graphite raw material is small, while the traditional crushing and flotation technology makes the loss of large flake serious. How to protect the large scale and improve the yield of large scale is the subject of the development of new beneficiation and purification technology.

The flake graphite provided by Franli has a good price and high quality. It is exported all over the world and has been widely praised.