Graphite is a carbon group element, and it is the crystallization of carbon element. In industry, graphite can be divided into crystalline graphite (flake graphite) and cryptocrystalline graphite (soil graphite) according to its crystallinity. Graphite mineral belongs to hexagonal system, layered structure and special atomic structure, which makes graphite have a series of characteristics: graphite has

Because of its special performance, it is widely used in metallurgy, machinery, petroleum, chemical industry, nuclear industry and national defense. Its main uses are:

A. Refractory material: In smelting industry, graphite crucible is made of graphite, which is used as a protective agent for steel ingot, and magnesia-carbon brick is used as the lining of smelting furnace.

B. Conductive materials: In the electrical industry, graphite is widely used as the coating of electrodes, brushes, electric rods, carbon tubes and TV picture tubes.

C. Wear-resistant materials and lubricants: In many mechanical equipment, graphite is used as wear-resistant and lubricating materials, which can slide at the speed of 100m/s in the temperature range of -200 ~ 2000℃ without or with little lubricating oil.

D sealing material: flexible graphite is used as piston ring gasket and sealing ring for centrifugal pumps, water turbines, steam turbines and equipment for conveying corrosive media.

E. Corrosion-resistant materials: containers, pipelines and equipment made of graphite can resist the corrosion of various corrosive gases and liquids, and are widely used in petroleum, chemical industry, hydrometallurgy and other departments.

F heat insulation, high temperature resistance and radiation protection materials: graphite can be used as neutron moderator of nuclear reactors, nozzle of rockets, nose cone of missiles, parts of aerospace equipment, heat insulation materials and radiation protection materials.