These impurities usually appear in the form of minerals, when response, pyrite and carbonate. In addition, there are gas such as water, asphalt, CO2, H2, CH4, N2. Therefore, when analyzing graphite, in addition to determining a fixed carbon content, the content of volatile and gray scores must be determined at the same time. Graphite's process characteristics mainly depend on its crystallization form. Different crystal graphite minerals have different industrial values and uses. Industry, natural graphite can be divided into three categories according to different crystal forms. 1. Deep litter graphite 2. Listed Gention 3. Hidden crystalline graphite

Graphite is a crystal mineral containing carbon, and its crystal skeleton is a six -square -layer structure. The distance between each network is 3.40, and the carbon atom distance of the same network layer of the same network is 1.42A. It belongs to the six -way crystal system with a complete layer of lapse. The molecular keys are mainly attractive to the molecular keys, so it is naturally floating. Graphite is soft, dark gray; with greasy feeling, it will pollute paper. The hardness is 1 ~ 2, and the hardness can increase to 3 ~ 5 with the increase in the vertical direction. The gravity is 1.9-2.3. Under the condition of isolation of oxygen, its melting point is above 3000 ° C and is one of the most temperature -resistant minerals. There are no pure graphite in nature, and often contains impurities such as SI02, A1203, Fe0, CAO, P2O5, CU0.