Graphite pillars mainly come from scraps generated during the mechanical processing of graphite electrodes and waste products generated from the graphitization process, as well as some waste graphite blocks. Because graphite has the characteristics of electrical conductivity, thermal conductivity, high temperature resistance, low ash content, high carbon content, and good chemical stability, it is widely used as a carburizing agent in steelmaking furnaces, a reducing agent in the chemical industry, and as one of the important raw materials for the production of aluminum carbon blocks.
Graphite particles are also called graphite pillars, small-sized graphite rods, graphite particles, etc. The names will be different depending on the industries they are used in, but the products are all the same and require high-purity, lubricating, and conductive graphite raw materials to be processed. There are two methods of manufacturing lubricating and conductive graphite particles, and the effects of the graphite particles produced by the two methods will be very different. One is to stir and extrudate graphite powder with a binder. This type of graphite particle is very soft, has very little compressive strength, and greatly reduces the conductive effect. Because it contains a large amount of binder, it also affects the lubricity of the graphite particles.
Graphite columns are used in guide bushings, guide posts, self-lubricating bearings, and wear plates. It was produced in my country in 1997 after learning from foreign products. The combination of domestic graphite columns and independent production of wear-resistant plates has made outstanding contributions to the development of my country's automobile industry, greatly improving the production efficiency of automobiles and lowering the cost of automobiles.
The thermal conductivity and electrical conductivity of graphite particles and high-purity graphite columns are quite high. Its electrical conductivity is 4 times higher than stainless steel, 2 times higher than carbon steel, and 100 times higher than ordinary non-metals. Its thermal conductivity not only exceeds that of steel, iron, lead, and other metal materials, but also decreases as the temperature increases. This is different from general metal materials. At extremely high temperatures, graphite even tends to be in an adiabatic state. Therefore, the thermal insulation performance of graphite is very reliable under ultra-high temperature conditions.
Graphite particles and high-purity graphite columns have good lubricity and plasticity. The friction coefficient of graphite is less than 0.1. Graphite can be formed into breathable and light-transmitting flakes. High-strength graphite is so hard that it is difficult to process with diamond tools.