Due to the chemical stability of graphite raw material, it is not easy to be infiltrated by molten glass, it will not change the composition of glass, graphite raw material has a good heat resistance and impact performance, and its size changes little with temperature. Therefore, it has become an indispensable mold material in glass manufacturing in recent years. Graphite raw material can be used to make molds for glass tubes, elbows, funnels, and other special-shaped glass bottles.
Graphite is a kind of intermediate between covalent semiconductors and metal. Carbon graphite materials have inherent conductivity and heat conduction. It doesn't react with most molten metals. Carbon graphite materials don't deform at high temperatures. With the increase of its own temperature, its conductivity and heat conduction strength is significantly improved, and its coefficient of thermal expansion is higher than that of metal. As an ideal material, graphite raw material is widely used in the powder sintering industry.
With the rapid development of the solar photovoltaic industry, the demand for import and export raw materials of monocrystalline silicon cells and polycrystalline silicon cells is increasing. In recent years, large-scale monocrystalline silicon processing plants and polycrystalline silicon processing plants have sprung up; Therefore, the production of monocrystalline silicon and polycrystalline silicon needs more and more raw and auxiliary materials, and high purity molded graphite is an important kind of these raw and auxiliary materials. The development of high purity quality graphites also promotes the production of high-quality monocrystalline silicon and polycrystalline silicon. Therefore, high purity molded graphite plays an important role in the photovoltaic industry.
Because of its advantages in structure, novel material selection, perfect design, and low energy consumption, carbon graphite crucible can be used as fuel in the production process, clean energy fuel can reduce pollution, high purity graphite crucible is mainly used for smelting rare metals (gold and silver). The ceramic crucible is used for smelting rare metals in the laboratory. Because of its strong acid-base resistance, small coefficient of thermal expansion, and strong strain resistance, carbon graphite crucible can be used for heating various liquids. In addition to the above application fields, the carbon graphite crucible has been widely used in casting, chemical industry, and machinery. It is made of graphite raw materials, which retains the advantages of graphite itself and is used to produce and manufacture the structural parts under stress.
Graphite rotor is mainly used for the turbocharger, vacuum booster of new energy vehicle, electronic vacuum pump, the cooling system of new electric vehicle and motor (wading motor). Graphite rotor needs to rotate at high speed in a sealed environment, so the first consideration of this kind of product is worn resistance, high-temperature resistance, corrosion resistance, no foreign matter falling off, and can rotate at high speed for a long time.
The processing speed of carbon graphite electrode is faster, and milling technology can complete the processing process and put into use in a shorter time. Compared with the copper electrodes, the processing efficiency is higher and the use is more convenient. Secondly, the carbon graphite electrode is processed with the same equipment, which can save the trouble of changing the mold back and forth, and has higher efficiency. Of course, it doesn't need to be processed manually after manufacturing, but it takes time for the copper electrodes to be processed manually, so carbon graphite electrode is widely manufactured and used by people.
Graphite raw material can be used as an antiwear agent and lubricant. High purity graphite can be used as a neutron retarder in atomic reactors. In the national defense industry, graphite raw material is also used to make solid-fuel rocket nozzles, missile nose cones, parts of aerospace equipment, heat insulation material, and anti-radiation material. In addition, in the military industry, graphite is also known to have the largest strength and the best toughness, a material with unlimited potential and unlimited possibilities.
Due to the high-temperature resistance, high-temperature strength and corrosion resistance of graphite products, the lining of many metallurgical furnaces can be built with carbon blocks, such as the bottom, hearth, and belly of the iron-smelting furnace, the lining of ferroalloy furnace, and calcium carbide furnace, the bottom, and side of aluminum reduction cell. Many crucibles for smelting precious and rare metals and graphite casting crucible for melting quartz glass are also made of carbon graphite materials.
Carbon graphite electrode is a kind of conductive material with high-temperature resistance and oxidation resistance, which is produced by crushing, proportioning, kneading, molding, roasting, impregnation, graphitization, machining, and a series of processes using petroleum coke as aggregate and coal tar pitch as a binder. It has good electrical properties and chemical stability, high mechanical strength at high temperature, less impurity content, and good vibration resistance. Carbon graphite electrode is a good conductor of heat and electricity.
Carbon graphite electrode impregnated with organic or inorganic resin has the characteristics of good corrosion resistance, good thermal conductivity, and low permeability. This kind of impregnated graphite is also called impermeable graphite. It is widely used in the production of various heat exchangers, reaction tanks, condensers, combustion towers, absorption towers, coolers, heaters, filters, pumps, and other equipment, and is widely used in petroleum refining, petrochemical, and other industrial sectors.
Graphite raw material has a good neutron retarder and is used in atomic reactors. Uranium graphite reactor is one of the most widely used atomic reactors. The decelerating material used in a powerful nuclear reactor should have a high melting point, stability, and corrosion resistance. Graphite raw material can fully meet the above requirements. The purity of graphite used in the atomic reactor is very high, and the impurity content should not exceed dozens of ppm. Especially the boron content should be less than 0.5ppm.
The structural materials used in production, such as crystal growth crucible, regional refining vessel, bracket, clamp, induction heater, etc., are all made of high purity graphite. Graphite insulation board and base used in vacuum smelting, high-temperature resistance furnace tube, bar, plate, grid, and other components are also made of graphite materials.
Graphite sealing ring is wear-resistant, high temperature resistant, pressure-resistant, corrosion-resistant, creep resistant, oil-free self-lubricating, low expansion coefficient, and excellent sealing performance. It can withstand drastic changes in temperature and pressure and is an ideal sealing element for all kinds of machinery.
Graphite raw material is widely used in the aerospace field because of its lubricity, easy processing, good thermal conductivity, thermal stability, and chemical stability, such as making sealing materials, throat lining materials, brush materials, etc.
Graphite raw material has good chemical stability at room temperature and can resist acid, alkali, and organic solvent corrosion. Graphite can be used as a polishing agent and rust remover in the light industry.
Graphite material not only has high chemical stability but also has good lubrication performance. Under the condition of high speed, high temperature, and high pressure, it is impossible to improve the wear resistance of sliding parts with lubricating oil. Graphite wear-resistant materials can work in corrosive media at temperatures of - 200 to 2000 degrees Celsius and at high sliding speeds without lubricating oil. Therefore, many compressors and pumps conveying corrosive media widely use piston rings, sealing rings, and bearings made of graphite materials. They operate without lubricant. This kind of wear-resistant material is made by impregnating common carbon or graphite material with organic resin or liquid metal material.