The specific application of graphite are as bellow:
1. Refractory materials include refractory bricks, crucible, continuous casting powder, mold core, mold detergent and high temperature resistant material.
The graphite crucibles and their related products, such as moulds, retorts, nozzles, and so on, have high temperature resistance; low thermal expansion; Stable to metal infiltration and erosion during metal smelting; good thermal shock stability at high temperature and excellent thermal conductivity, so the graphite crucibles and its related products are widely used in direct molten metal technology.
2, steel-making
Graphite and other impurities can be used as a carbon raiser in the steel industry. Carburizing has a wide range of carbonaceous materials, including artificial graphite, petroleum coke, metallurgical coke and natural graphite. Graphite is still one of the main application of amorphous graphite in the world.
3, for conductive materials
Graphite is widely used as electrodes, brushes, carbon rods, carbon tubes, mercury rectifier cathode graphite gaskets, telephone parts, television picture tube coating and so on in the electrical industry. In the smelting of various alloy steel, iron alloy, the extensive, The most widely used is graphite electrode. The particle size and grade requirements are very high for Graphite used in the electrical industry.
4, for wear and lubrication materials
Graphite often used as lubricant in the mechanical industry. Lubricant oil can not be used in high-speed, high-temperature, high-pressure conditions, but the graphite wear-resistant materials can be used at -200 ℃ to 2000 ℃ temperature and high sliding speed (loom / s) without lubricating oil. Many of the equipment used to transport corrosive media, use graphite material widely to make piston rings, seals and bearings, they operate without adding lubricating oil. graphite paste is also used as lubricant material in many metal processing (drawing, drawing).
5, for corrosion-resistant materials
Graphite has good chemical stability. It is widely used in the production of heat exchangers, reaction tanks, condensers, combustion towers, absorbers, coolers, heaters, filters, Pumps and other equipments and so on, which are characterized by good corrosion resistance, good thermal conductivity and low permeability. The use of graphite for these equipment for the petrochemical, hydrometallurgy, acid-base production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
6, for the nuclear industry and defense industry
Graphite has good neutron deceleration performance, the earliest as a slowdown agent used in atomic reactors, “uranium-graphite” reactor is the application of a more atomic reactor. The decelerating material in the nuclear reactors for power should have high melting point, stable and corrosion resistance, and graphite can meet the above requirements. we can also produce carbon composite material for this application.
7, for anti-rust materials.
Graphite can prevent boiler scaling. Tests have shown that adding a certain amount of graphite powder in the water, to prevent the boiler surface scaling. In addition to graphite coated metal chimneys, roofs, bridges, pipes can be anti-corrosion and rust.
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