1, for refractories: Graphite and its products have the properties of high temperature, high strength, and in the metallurgical industry mainly used to manufacture graphite crucible, commonly used in steel ingot of graphite as a protective agent, metallurgical furnace lining.
2. As the conductive material: used in the electrical industry for manufacturing an electrode, a positive electrode brushes, carbon rod, carbon tubes, mercury positive converter, graphite gaskets, phone parts, television picture tube coating.
3. As wear-resistant lubricating materials: graphite often in the machinery industry as a lubricant. Lubricants are often not at a high speed, high temperature, high-pressure conditions, and wear-resistant graphite material may be at high sliding speed, lubricating oil without working at a temperature of 200 ~ 2000 ℃. Many corrosive media delivery device, widely used material graphite piston cup, seals and bearings, do not need adding oil when they are running. Graphite also many good metalworking lubricants (Roberts, trombone) time.
4. Graphite has excellent chemical stability. After special processing of graphite with corrosion resistance, good thermal conductivity, low permeability, it is used extensively for the production of heat exchangers, the reaction tank, condenser, burning tower, absorption, coolers, heaters, filters pump equipment. Widely used in petrochemical, hydrometallurgy, acid production, synthetic fibers, paper and other industrial sectors, can save a lot of metal materials.
5. For casting, foundry, dies and high temperature metallurgical materials: graphite due to thermal expansion coefficient is small, and thermal shock resistant to change, as the glass molds, the use of graphite to give ferrous metal casting precise size, smooth surface, high yield, without processing or minor processing can be used, thus saving a lot of metal. Production of cemented carbide powder metallurgy process, typically graphite material die and sintering of porcelain boat. Single crystal silicon crystal growth crucible, regional refining vessel, the stent fixture, induction heaters, etc. are processed with high-purity graphite. Additionally graphite can be made vacuum smelting graphite insulation panels and base, high-temperature resistance furnace tube, rods, plates, sheds and other cell components.
6 for the nuclear industry and the defense industry: graphite has good neutron moderator for the nuclear reactor, the uranium-graphite reactors is currently the more of a nuclear reactor. As used in nuclear reactor power reduction material should have a high melting point, stability, corrosion-resistant properties, graphite fully meet the above requirements. As a nuclear reactor with high purity graphite, impurities should not exceed dozens of PPM. In particular the boron content should be less than 0.5PPM. In the defense industry, also made of graphite solid fuel rocket nozzle components, missile nose cones, Astronautical equipment, insulation materials and anti-radiation material.
7. Graphite can prevent boiler scale, the unit tests show that the water is added in an amount of graphite powder (with a ton of water about 4 to 5 grams) to prevent fouling of the boiler surfaces. Also graphite coated on metal chimneys, roofs, bridges, pipelines can corrosion and rust.
8. Graphite can be used as pencil lead, paint, polishes. Graphite after special processing, can produce a variety of special materials for the relevant industrial sectors.
9. Electrodes: How can replace copper as graphite electrode