| Brand Name: | HONGYUE |
|---|---|
| Model Number: | HY-029 |
| Place of Origin: | China (Mainland) |
Quick Details
Specifications
Graphite introduction
Graphite is an allotrope of carbon element, each carbon atom of the neighboring link also three carbon atoms (arrangement is multiple hexagon honeycomb) by covalent bonds with the covalent molecule is formed. Because each carbon atom emits an electron, the electrons are free to move, so the graphite is a conductor. Graphite is one of the most soft minerals, and its use includes the manufacture of pencil cores and lubricants. Carbon is a kind of non metallic element, which is located in the second period IVA group of the periodic table.
Graphite application
1, as a refractory material: graphite and its products have properties of high - strength, high temperature resistance, mainly used to produce graphite crucible in the metallurgical industry, in steelmaking in graphite is usually used for the protection of steel ingot agent, metallurgical furnace lining.
2, as the conductive material: used for manufacturing electrode, carbon brush, carbon rod, carbon nanotubes, mercury is the cathode in electrical industry, graphite gaskets, telephone parts, TV picture tube coating.
3, as wear-resistant lubricating material: Graphite in the mechanical industry as a lubricant. Lubricating oils are often not used in high speed, high temperature and high pressure conditions, and graphite wear resistant materials can be used at high sliding speed in 200~2000. Many of the devices that transport corrosive media are widely used in the piston cup, seal rings and bearings, which are widely used in graphite materials. Graphite is many metal processing (drawing, drawing) the good lubricant.
4, graphite has good chemical stability. After special processing of graphite, with corrosion resistance, good thermal conductivity, low permeability characteristics, which is widely used in the manufacturing of heat exchanger, reaction tank, condenser, the burning tower, absorption tower, a cooler, a heater, a filter, a pump device. Widely used in petrochemical, wet metallurgy, acid and alkali production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
The corrosion resistance of the different types of non transparent graphite is different because of the different resin. Such as phenolic resin impregnated are acid, but not alkali resistant; furfuryl alcohol resin impregnated both acid and alkali. Heat tolerance of different varieties also have differences: carbon and graphite in a reducing atmosphere can be resistant to 2000 to 3000 DEG C, in an oxidizing atmosphere respectively in 350 and 400 degrees Celsius oxidation; impermeable graphite varieties with impregnating vary, generally by the heat-resistant phenolic or furfuryl alcohol immersed in 180 DEG C below.
5, casting, foundry, molding and high temperature metallurgical material: due to graphite thermal expansion coefficient is small, and the capability of rapid quench heat changes, as the mold of the glass, the use of graphite black metal by casting, precise size, smooth surface and high rate of finished products, processed or minor processing can be used, thus saving a large amount of metal. Production of hard alloys and other powder metallurgy process, usually made of graphite materials and sintering of the ceramic mold. Single crystal silicon crystal growth crucible, region refining container, bracket clamp, induction heater and so on are made of high pure graphite processing. In addition, graphite can be used as a vacuum smelting graphite heat insulation board and base, high temperature resistance furnace tube, rod, plate, lattice shed and other components.
6, used in the atomic energy industry and defense industry: graphite has a good neutron moderator used in the atomic reactor, uranium one graphite reactor is more applied to a nuclear reactor. The reduction material in the atomic energy reactor used as power should have high melting point, stability, corrosion resistance, graphite can meet the above requirements. As a nuclear reactor, the purity of graphite is very high, and the impurity content should not exceed a few tens of PPM. Especially in which the content of boron should be less than 0.5PPM. In the defense industry, the production of solid fuel rocket nozzle, the nose cone of the missile, the parts of the space navigation equipment, thermal insulation materials and.
7, graphite can prevent boiler scaling, the relevant unit test shows that in the water to add a certain amount of graphite powder (about 4~5 grams of water per ton) to prevent fouling of boiler surface. In addition, graphite coated metal chimney, roof, bridges, pipes can be anti-corrosion.
8, graphite can be used as a pencil core, paint, polishing agent. Graphite after special processing, you can make a variety of special materials used in the industrial sector.
Graphite is an allotrope of carbon element, each carbon atom of the neighboring link also three carbon atoms (arrangement is multiple hexagon honeycomb) by covalent bonds with the covalent molecule is formed. Because each carbon atom emits an electron, the electrons are free to move, so the graphite is a conductor. Graphite is one of the most soft minerals, and its use includes the manufacture of pencil cores and lubricants. Carbon is a kind of non metallic element, which is located in the second period IVA group of the periodic table.
Graphite application
1, as a refractory material: graphite and its products have properties of high - strength, high temperature resistance, mainly used to produce graphite crucible in the metallurgical industry, in steelmaking in graphite is usually used for the protection of steel ingot agent, metallurgical furnace lining.
2, as the conductive material: used for manufacturing electrode, carbon brush, carbon rod, carbon nanotubes, mercury is the cathode in electrical industry, graphite gaskets, telephone parts, TV picture tube coating.
3, as wear-resistant lubricating material: Graphite in the mechanical industry as a lubricant. Lubricating oils are often not used in high speed, high temperature and high pressure conditions, and graphite wear resistant materials can be used at high sliding speed in 200~2000. Many of the devices that transport corrosive media are widely used in the piston cup, seal rings and bearings, which are widely used in graphite materials. Graphite is many metal processing (drawing, drawing) the good lubricant.
4, graphite has good chemical stability. After special processing of graphite, with corrosion resistance, good thermal conductivity, low permeability characteristics, which is widely used in the manufacturing of heat exchanger, reaction tank, condenser, the burning tower, absorption tower, a cooler, a heater, a filter, a pump device. Widely used in petrochemical, wet metallurgy, acid and alkali production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
The corrosion resistance of the different types of non transparent graphite is different because of the different resin. Such as phenolic resin impregnated are acid, but not alkali resistant; furfuryl alcohol resin impregnated both acid and alkali. Heat tolerance of different varieties also have differences: carbon and graphite in a reducing atmosphere can be resistant to 2000 to 3000 DEG C, in an oxidizing atmosphere respectively in 350 and 400 degrees Celsius oxidation; impermeable graphite varieties with impregnating vary, generally by the heat-resistant phenolic or furfuryl alcohol immersed in 180 DEG C below.
5, casting, foundry, molding and high temperature metallurgical material: due to graphite thermal expansion coefficient is small, and the capability of rapid quench heat changes, as the mold of the glass, the use of graphite black metal by casting, precise size, smooth surface and high rate of finished products, processed or minor processing can be used, thus saving a large amount of metal. Production of hard alloys and other powder metallurgy process, usually made of graphite materials and sintering of the ceramic mold. Single crystal silicon crystal growth crucible, region refining container, bracket clamp, induction heater and so on are made of high pure graphite processing. In addition, graphite can be used as a vacuum smelting graphite heat insulation board and base, high temperature resistance furnace tube, rod, plate, lattice shed and other components.
6, used in the atomic energy industry and defense industry: graphite has a good neutron moderator used in the atomic reactor, uranium one graphite reactor is more applied to a nuclear reactor. The reduction material in the atomic energy reactor used as power should have high melting point, stability, corrosion resistance, graphite can meet the above requirements. As a nuclear reactor, the purity of graphite is very high, and the impurity content should not exceed a few tens of PPM. Especially in which the content of boron should be less than 0.5PPM. In the defense industry, the production of solid fuel rocket nozzle, the nose cone of the missile, the parts of the space navigation equipment, thermal insulation materials and.
7, graphite can prevent boiler scaling, the relevant unit test shows that in the water to add a certain amount of graphite powder (about 4~5 grams of water per ton) to prevent fouling of boiler surface. In addition, graphite coated metal chimney, roof, bridges, pipes can be anti-corrosion.
8, graphite can be used as a pencil core, paint, polishing agent. Graphite after special processing, you can make a variety of special materials used in the industrial sector.
