As a common mineral of carbon, graphite is closely related to our lives, and ordinary people are common pencils, dry battery carbon rods and so on. However, graphite has important uses in military industry, refractory materials, metallurgical industry, chemical industry and so on.
Graphite has both metallic and non-metallic characteristics: graphite as a good conductor of thermoelectricity reflects the metal characteristics; Non-metallic characteristics are high temperature resistance, high thermal stability, chemical inertness and lubricity, and its use is also very wide.
Main application field
1, refractory materials
In the metallurgical industry, it is used as a refractory material and a protective agent for steel ingot. Because graphite and its products have the properties of high temperature resistance and high strength, it is used in the metallurgical industry to make graphite crucible, steel furnace lining, protection slag and continuous casting.
2, metallurgical casting industry
Steel and casting: Graphite is used as a carburizer in the steelmaking industry.
In casting, graphite is used for casting, sanding, molding materials: due to the small coefficient of thermal expansion of graphite, the use of graphite as casting paint, the casting size is accurate, the surface is smooth, the casting cracks and pores are reduced, and the yield is high. In addition, graphite is used in the production of powder metallurgy, superhard alloys; Production of carbon products.
3. Chemical industry
Graphite has good chemical stability. The specially processed graphite has the characteristics of corrosion resistance, good thermal conductivity and low permeability. The use of graphite to make graphite pipes can ensure the normal chemical reaction and meet the needs of manufacturing high-purity chemicals.
4, Electrical and electronic industry
Used in the production of micro-powder graphite electrode, brush, battery, lithium battery, fuel cell positive electrode conductive material, anode plate, electric rod, carbon tube, graphite gasket, telephone parts, rectifier positive electrode, electromagnetic shielding conductive plastics, heat exchanger components and TV picture tube coating. Among them, graphite electrode is widely used for smelting various alloys; In addition, graphite is used as the cathode of electrolytic cells for electrolysis of metals such as magnesium and aluminum.
At present, fluorine fossil inks (CF, GF) are widely used in high-energy battery materials, especially CF0.5-0.99 fluorine fossil inks, which are more suitable for making anode materials for high-energy batteries, and miniaturizing batteries.
5. Atomic energy, aerospace and defense industries
Graphite has a high melting point, stability, corrosion resistance and good resistance to A-rays and neutron deceleration performance, used in the nuclear industry of graphite materials called nuclear graphite. There are neutron moderators for atomic reactors, reflectors, hot cylinder ink for isotope production, spherical graphite for high temperature gas cooled reactors, nuclear reactor thermal components sealing gaskets and bulk blocks.
Graphite is used in thermal reactors and, hopefully, fusion reactors, where it can be used as a neutron moderator in the fuel zone, as a reflector material around the fuel zone, and as a structural material inside the core.
In addition, graphite is also used in the manufacture of long-range missile or space rocket propulsion materials, aerospace equipment parts, heat insulation and radiation protection materials, the manufacture of solid fuel rocket engine tail nozzle throat liner, etc., used in the production of aviation brushes, and spacecraft DC motors and aerospace equipment parts, satellite radio connection signals and conductive structural materials; In the defense industry, it can be used to manufacture bearings for new submarines, produce high-purity graphite for national defense, graphite bombs, nose cones for stealth aircraft and missiles. In particular, graphite bombs can paralyze the operation of substations and other large electrical appliances, and have a greater impact on the weather.
6. Machinery industry
Graphite is widely used in the production of automotive brake linings and other components as well as high-temperature lubricants in the mechanical industry; After graphite is processed into colloidal graphite and fluorofossil ink (CF, GF), it is commonly used as a solid lubricant in the machinery industry such as aircraft, ships, trains, automobiles and other high-speed running machinery.
Post time: Nov-08-2023