Graphite can be divided into two categories: natural graphite and artificial graphite. Natural graphite comes from graphite deposits, and natural graphite can also be divided into flake graphite, earthy graphite and block graphite.
The graphite obtained from natural mining contains a lot of impurities, so it needs to be beneficiation, and the impurity content can be reduced before use. Some carbon products sometimes add a certain amount of natural graphite.
The largest production volume in the carbon industry is various artificial graphite products. Artificial graphite products generally use easily graphitized petroleum coke and pitch coke as raw materials. After batching, kneading, molding, roasting, graphitization (high temperature heat treatment) and mechanical processing It is made by a series of processes, and the production cycle is as long as tens of days.