Complaint
Brand No. | Fixed Carbon (%)≮ | Ash (%)≯ | Moisture (%)≯ | Particle Size (%) | Inspection Equipment |
F-00 | --- | 0.5 | 0.5 | 1≮90% | BT-3000 BT-3000 Particle Sizer |
F-0 | --- | 1.0 | 0.5 | 2≮90% | |
F-1 | --- | 1.0 | 0.5 | 4≮90% | |
F-2 | --- | 1.4 | 0.5 | 6≮90% | |
F-2A | --- | 2.0 | 0.5 | 10≮90% | |
F-3 | 90 | --- | 1.0 | 38≮90% | Wet Sieve |
F-4 | 88 | --- | 1.0 | ||
F-5 | --- | 5.0 | 0.5 | ||
F-6 | --- | 4.0 | 0.5 | ||
F-7 | --- | 3.0 | 0.5 | ||
F-8 | --- | 2.0 | 0.5 | ||
F-9 | --- | 1.0 | 0.5 |
Flake Graphite Application :
1. Refractory materials: Graphite and its products have the properties of high temperature resistance and high strength. In the metallurgical industry, graphite is mainly used to manufacture graphite crucibles. In steelmaking, graphite is commonly used as a protective agent for steel ingots and the lining of metallurgical furnaces.
2. As conductive material: used in the electrical industry to manufacture electrodes, brushes, carbon rods, carbon tubes, the positive electrode of mercury positive current, graphite gaskets, telephone parts, coatings for TV picture tubes, etc.
3. As a wear-resistant lubricating material: Graphite is often used as a lubricant in the machinery industry. Lubricating oil can not be used under the conditions of high speed, high temperature and high pressure, and graphite wear-resistant materials can work at (1) 200 ~ 2000 ºC at high sliding speed without using lubricant. Many equipments for transporting corrosive media widely use graphite materials to make piston cups, seal rings and bearings. They do not need to add lubricating oil during operation. Graphite emulsion is also a good lubricant for many metal processing (wire drawing, tube drawing).
4. Graphite has good chemical stability. Specially processed graphite has the characteristics of corrosion resistance, good thermal conductivity and low permeability. It is widely used in the manufacture of heat exchangers, reaction tanks, condensers, combustion towers, absorption towers, coolers, heaters, filters , Pump equipment. Widely used in petrochemical industry, hydrometallurgy, acid-base production, synthetic fiber, papermaking and other industrial sectors, it can save a lot of metal materials.
5. Casting, sand turning, compression molding and high-temperature metallurgical materials: Due to the small thermal expansion coefficient of graphite and resistance to rapid cooling and heat changes, it can be used as a casting mold for glassware. After using graphite, the ferrous metal can obtain accurate casting size and surface finish rate. High, can be used without processing or a little processing, thus saving a lot of metal. The production of powder metallurgy processes such as cemented carbide usually uses graphite materials to make porcelain boats for stamping and sintering. Single crystal silicon crystal growth crucibles, area refining vessels, support fixtures, induction heaters, etc. are all made of high-purity graphite. In addition, graphite can also be used as vacuum heat smelting graphite heat insulation board and base, high temperature resistance furnace tube, rod, plate, grid and other components.
6. Used in atomic energy industry and national defense industry: Graphite has good neutron moderator for use in atomic reactors. Uranium-graphite reactors are currently widely used in atomic reactors. The decelerating material in the nuclear reactor used as power should have high melting point, stability and corrosion resistance. Graphite can fully meet the above requirements. The purity of graphite used in atomic reactors is very high, and the impurity content should not exceed dozens of PPM. Especially the boron content should be less than 0.5PPM. In the defense industry, graphite is also used to manufacture nozzles for solid fuel rockets, nose cones for missiles, parts for space navigation equipment, thermal insulation materials, and anti-radiation materials.
Characteristics of flake graphite:
1) High temperature resistant type: the melting point of graphite is 3850 ± 50, the boiling point is 4250, even if it is burned by ultra-high temperature arc, the weight
The loss is small, and the coefficient of thermal expansion is also small. The strength of graphite increases with increasing temperature. At 2000, the strength of graphite increases
Double.
2) Electrical and thermal conductivity: graphite [2] has a conductivity that is one hundred times higher than that of ordinary non-metallic ores. Thermal conductivity exceeds steel, iron, lead and other gold
. Material. The thermal conductivity decreases with increasing temperature. Even at extremely high temperatures, graphite becomes an insulator.
3) Lubricity: The lubricating performance of graphite depends on the size of graphite flakes. The larger the flakes, the smaller the friction coefficient and the better the lubricating performance.
it is good.
4) Chemical stability: Graphite has good chemical stability at normal temperature, and is resistant to acid, alkali and organic solvents.
5) Plasticity: Graphite has good toughness and can be grown into very thin flakes.
6) Thermal shock resistance: graphite can withstand the drastic change of temperature without damage when it is used at normal temperature. When the temperature changes suddenly, graphite
The volume does not change much and there will be no cracks.
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