Graphite grinding process by isostatic pressing

Author: guilin hong cheng Views: 0 Release date: 2024-02-03 11:05:03

Isostatic pressed graphite is a new type of graphite material developed in the 1960s, which has a series of excellent properties. Isostatically pressed graphite is widely used in metallurgy, chemistry, electrical, aerospace and atomic energy industry, and with the development of science and technology, the application field is still expanding. HCM Machinery as isostatic press graphite grinding equipment manufacturer, today to introduce you the isostatic press graphite grinding process.

Like ordinary graphite, such as graphite electrode for steelmaking, graphite anode for magnesium electrolysis, graphitized cathode for aluminum electrolysis, etc., isostatic pressed graphite also has to be calcined, crushed, sieving, grinding, melting of the bonding agent, as well as batching, mixing, molding, roasting, impregnation, graphitization and other processes. However, the production process of isostatic pressed graphite is very different from that of graphite electrodes, graphite anodes, or graphitized cathodes. Isostatic graphite requires isotropic raw materials in structure, needs to be ground into a finer powder, needs to apply isostatic molding technology, the roasting cycle will be very long, in order to achieve the target density, the need for multiple impregnation-roasting cycles, the graphitization cycle is much longer than ordinary graphite. Because the aggregate of isostatic pressed graphite is composed of petroleum coke or asphalt coke particles with an average particle size of less than 1 micron to tens of microns, the specific surface area is very large, so when the coal pitch is added to the kneading pan for mixing, the coal pitch and the aggregate fine powder are not easy to mix evenly, and it is not easy to achieve the required coal pitch to fully penetrate into the pores of the fine powder of the aggregate particles, and evenly coated in the aggregate Grain fine powder surface for purpose. The aggregate size of isostatic pressed graphite is usually required to reach 20um or less. At present, the finest isostatically pressed graphite, with a maximum particle diameter of 1μm, is very fine. Generally speaking, the use of Hongcheng ultra-fine vertical mill can be ground to 10-20μm at a time, and the secondary classification system can separate 2 to 3μm of ultra-fine powder. The coke powder aggregate and coal asphalt powder produced by Hcm Machinery isostatic pressing graphite grinding equipment are fully mixed first, so that in the next heating and kneading process, the coal asphalt powder melts, fully penetrates into the pores of the fine powder of the aggregate particles, and can evenly walk to the surface of the fine powder, so as to achieve the purpose of material structure uniformity.

The isostatic pressed graphite produced by HCM Machinery isostatic pressed graphite grinding equipment has the characteristics of fine and compact structure, good uniformity, excellent mechanical properties, wear resistance, isotropy and so on. If you have related needs, please call us for