Application situation Since the Ultra high power Graphite Electrode was discovered, countries all over the world attached great importance to it, conducted a lot of research, and developed the preparation process, characterization method and various detection methods of carbon / carbon composite materials. The carbon / carbon composite material is a composite material of carbon fiber reinforced carbon matrix. Although carbon / carbon composite materials have not been used as general industrial materials at present, their excellent performance will continue to expand their application range.
There are many coating process methods that have been developed, such as embedding conversion method, CVD method, sol-gel method, liquid phase infiltration method, liquid phase infiltration method, etc . Many thermosetting greases have a high carbon retention rate, such as phenolic resin, furan resin, polyimide, polyphenylene and polyphenylene oxide.
In view of the unique properties of this material, carbon / carbon composite materials have unparalleled advantages over other materials in high-temperature and long-life applications, and will be the most important trend for the development of high-temperature structural materials in the future. This technology can not only increase the residual carbon rate, reduce the pore size of the impregnable preform, but also effectively prevent the asphalt from being pyrolyzed by the gas generated by the pyrolysis of the gas pores, thereby greatly improving the densification efficiency.
The asphalt impregnation process is similar to the resin impregnation process, except that the asphalt needs to be vacuum-melted in the melting tank, and then the asphalt is injected from the melting tank into the impregnation tank for impregnation. The densification methods of carbon / carbon composite materials are mainly divided into two categories: the liquid-phase impregnation process of resin and asphalt and the gas-phase infiltration process (CVI) of hydrocarbon gas.0g / cm3), only 1/4 of nickel-based superalloys and 1/2 of ceramic materials. Studies have shown that the use of this process can greatly shorten the deposition cycle, showing a good application prospect. The basic theoretical issues related to carbon / carbon composite materials, such as interfacial bonding, fracture behavior, high temperature performance, etc. (1) The entire system is composed of carbon elements.
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There are many coating process methods that have been developed, such as embedding conversion method, CVD method, sol-gel method, liquid phase infiltration method, liquid phase infiltration method, etc . Many thermosetting greases have a high carbon retention rate, such as phenolic resin, furan resin, polyimide, polyphenylene and polyphenylene oxide.
In view of the unique properties of this material, carbon / carbon composite materials have unparalleled advantages over other materials in high-temperature and long-life applications, and will be the most important trend for the development of high-temperature structural materials in the future. This technology can not only increase the residual carbon rate, reduce the pore size of the impregnable preform, but also effectively prevent the asphalt from being pyrolyzed by the gas generated by the pyrolysis of the gas pores, thereby greatly improving the densification efficiency.
The asphalt impregnation process is similar to the resin impregnation process, except that the asphalt needs to be vacuum-melted in the melting tank, and then the asphalt is injected from the melting tank into the impregnation tank for impregnation. The densification methods of carbon / carbon composite materials are mainly divided into two categories: the liquid-phase impregnation process of resin and asphalt and the gas-phase infiltration process (CVI) of hydrocarbon gas.0g / cm3), only 1/4 of nickel-based superalloys and 1/2 of ceramic materials. Studies have shown that the use of this process can greatly shorten the deposition cycle, showing a good application prospect. The basic theoretical issues related to carbon / carbon composite materials, such as interfacial bonding, fracture behavior, high temperature performance, etc. (1) The entire system is composed of carbon elements.
https://www.china-graphiteelectrode.com/product/graphite-electrode/ultra-graphite-electrode.html
The steel mold High Quality Graphite Electrode is drilled into the oil hole with a hole diameter of about 10mm and a hole distance of about 150mm. There are not many domestic enterprises engaged in graphite for EDM, only a few. The performance of the product is divided into coarse and fine from the structural point of view, and the most compact model is FE779, which uses ultra-fine raw materials with a particle size of 3μm; in terms of strength and hardness, between models
The difference is large. To fully meet the development requirements of the EDM industry, that is, faster processing speed, smoother processing surface and lower graphite wear, it is necessary to develop new products and improve the current process s level. The graphite used for EDM in Roland, France is similar to other countries. 11., Ltd.2., ’Isostatic pressure in the United States, Germany, France, Russia, and Pollen Development of Isotropic Graphite ’,’
Carbon Technology ’, 2005, (1): 32-36 [8] Liu Quanchang,’ Growing in China and Growing Together-A New Departure of the Carpenter Roland Group Renamed Mersen Group ’,’ China Chemical News ’ , 2010. It focuses on the development, products, processes and applications of graphite for EDM. Only EK82 was retained in the graphite product sample, but it was renamed R8340. Table 2 Models and performance of the old graphite for EDM [2] Table 3 Models and performance of the new graphite for EDM [3] 2. Summary In summary,
Germany and France have been producing graphite for EDM for decades of development history, from their product series From the aspects of continuous improvement of varieties, improvement of production technology, improvement of equipment level, and improvement of application service quality, we have accumulated quite rich experience for reference. Reference [1] ’Carbon Technology’ investigation group, ’Carbon Technology Investigation Report to West Germany, Britain, Austria’, 1981.6 The application is becoming more and more perfect. Shenzhen Capronroland Carbon Products Co. was established in Shenzhen, and Shanghai Capronroland Chemical Carbon Products Co. 3. [12 ],
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The difference is large. To fully meet the development requirements of the EDM industry, that is, faster processing speed, smoother processing surface and lower graphite wear, it is necessary to develop new products and improve the current process s level. The graphite used for EDM in Roland, France is similar to other countries. 11., Ltd.2., ’Isostatic pressure in the United States, Germany, France, Russia, and Pollen Development of Isotropic Graphite ’,’
Carbon Technology ’, 2005, (1): 32-36 [8] Liu Quanchang,’ Growing in China and Growing Together-A New Departure of the Carpenter Roland Group Renamed Mersen Group ’,’ China Chemical News ’ , 2010. It focuses on the development, products, processes and applications of graphite for EDM. Only EK82 was retained in the graphite product sample, but it was renamed R8340. Table 2 Models and performance of the old graphite for EDM [2] Table 3 Models and performance of the new graphite for EDM [3] 2. Summary In summary,
Germany and France have been producing graphite for EDM for decades of development history, from their product series From the aspects of continuous improvement of varieties, improvement of production technology, improvement of equipment level, and improvement of application service quality, we have accumulated quite rich experience for reference. Reference [1] ’Carbon Technology’ investigation group, ’Carbon Technology Investigation Report to West Germany, Britain, Austria’, 1981.6 The application is becoming more and more perfect. Shenzhen Capronroland Carbon Products Co. was established in Shenzhen, and Shanghai Capronroland Chemical Carbon Products Co. 3. [12 ],
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The hydraulic graphite electrode FOR EAF is equipped with plastic steel and plexiglass dust-proof devices (requiring beautiful appearance, sealing, air inlets, and coordination with the kiln body). Optional printer. 6. 6.5 yard height: ≤210mm, load per plate ≤18.8 In the control cabinet, heat dissipation adopts a ventilating fan with a screen, shutters are used as the air intake channel on the bottom side of the control cabinet, and a lighting device is installed in the cabinet. 5.9
There are two adjustable chimneys in the furnace temperature rising section of 300 ℃ ~ 700 ℃, the colloid and harmful gases are discharged to the outside, and the effluent is ignited by ignition to minimize environmental pollution. 9.1 Furnace size: 25000 × 720 × 270 (including the thickness of the push plate) (L × W × H) mm (double push plate).6 Carbon rod terminal cavity is sealed with silicon rubber mud, and terminal posts are ceramic insulated posts. Replacement chambers are set at the front and back of the furnace body, and products enter and exit the furnace chamber through the replacement chamber to ensure the tightness of the furnace mouth.1 Computer monitoring system 6.
The silicon carbon rod joint is compressed by a clamp and sealed with a jacket. The furnace structure is stable, the furnace temperature and atmosphere are uniform, energy saving and durable, and the structure design is reasonable.3Mpa.10 Propulsion speed: 600-2500mm / h.1 Product material: powder material. 5.5 In order to prevent the exhaust gas from corroding the heating rod, the heating rod needs to be protected by a ceramic tube.2 Power supply capacity is greater than 260KVA. The main thrust speed is 500-2800mm / h, stepless adjustment Speed; system rated pressure 6.2 The temperature control instrument adopts digital display intelligent instrument. 6.3 Software: It adopts the secondary development system of Beijing Kunlun Tongzhou Configuration Software, with rich and beautiful control interface.
Uses It is used for the firing of graphite anode materials.5 The control cabinet panel is equipped with a main power switch, voltmeter, ammeter, intelligent digital display temperature control instrument, switch, button, indicator, etc. 6.3 Temperature control mode: Phase shift triggering using thyristor module, 0 ~ 98% power output can be adjusted. Requirements for power source and installation conditions of the equipment 8. 4.10
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There are two adjustable chimneys in the furnace temperature rising section of 300 ℃ ~ 700 ℃, the colloid and harmful gases are discharged to the outside, and the effluent is ignited by ignition to minimize environmental pollution. 9.1 Furnace size: 25000 × 720 × 270 (including the thickness of the push plate) (L × W × H) mm (double push plate).6 Carbon rod terminal cavity is sealed with silicon rubber mud, and terminal posts are ceramic insulated posts. Replacement chambers are set at the front and back of the furnace body, and products enter and exit the furnace chamber through the replacement chamber to ensure the tightness of the furnace mouth.1 Computer monitoring system 6.
The silicon carbon rod joint is compressed by a clamp and sealed with a jacket. The furnace structure is stable, the furnace temperature and atmosphere are uniform, energy saving and durable, and the structure design is reasonable.3Mpa.10 Propulsion speed: 600-2500mm / h.1 Product material: powder material. 5.5 In order to prevent the exhaust gas from corroding the heating rod, the heating rod needs to be protected by a ceramic tube.2 Power supply capacity is greater than 260KVA. The main thrust speed is 500-2800mm / h, stepless adjustment Speed; system rated pressure 6.2 The temperature control instrument adopts digital display intelligent instrument. 6.3 Software: It adopts the secondary development system of Beijing Kunlun Tongzhou Configuration Software, with rich and beautiful control interface.
Uses It is used for the firing of graphite anode materials.5 The control cabinet panel is equipped with a main power switch, voltmeter, ammeter, intelligent digital display temperature control instrument, switch, button, indicator, etc. 6.3 Temperature control mode: Phase shift triggering using thyristor module, 0 ~ 98% power output can be adjusted. Requirements for power source and installation conditions of the equipment 8. 4.10
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These materials include wood, sawdust, coal, coke, peat, lignin, fruit core, hard nut shell, sucrose pulp, bone, lignite, petroleum residue, etc. At present, China is the world’s largest producer and exporter of activated carbon.6%. Banks need to focus on the activated carbon industry is facing market risk policy. Improve research and development capabilities. It is a resource-consuming type. It only depends on simple primary processing exports. In addition, because the added value of the product is not high, China’s activated carbon exports are liable to fall into foreign anti-dumping sanctions. With the beginning of the U. The highest tax rate is 228. It is also used in military and high-tech industries.
Raising the industry threshold. imposing high anti-dumping duties on China’s export products, the problem of disorderly competition in activated carbon exports has been further exposed. This has led some countries to launch anti-dumping investigations against activated carbon companies in China. High energy consumption is an obstacle to industrial development. Seize the opportunity. Develop high value-added products. graphite electrode FOR EAF have increased by 57. It has a developed internal pore structure and a large specific surface area. It has a developed internal pore structure and a large specific surface area. Its structure is Charcoal is formed by the accumulation of hexacyclic compounds.
The ash content can be reduced by water washing or pickling. Its role is to quickly get adsorbent molecules into the smaller pores inside the activated carbon; The catalyst often precipitates in a small amount in the micropores, mostly in the macropores and mesopores. Mechanical properties of activated carbon (1) Particle size:
Labor costs are relatively low.08%. According to statistics from Nanjing Customs. To deal with the current situation in the industry. It has development potential. The high anti-dumping tax is a significant factor for Chinese activated carbon exports to the United States Dozens of Chinese companies that have been imposed high punitive tariffs mean they will lose the U. Annual global demand is growing at a rate of 3
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Raising the industry threshold. imposing high anti-dumping duties on China’s export products, the problem of disorderly competition in activated carbon exports has been further exposed. This has led some countries to launch anti-dumping investigations against activated carbon companies in China. High energy consumption is an obstacle to industrial development. Seize the opportunity. Develop high value-added products. graphite electrode FOR EAF have increased by 57. It has a developed internal pore structure and a large specific surface area. It has a developed internal pore structure and a large specific surface area. Its structure is Charcoal is formed by the accumulation of hexacyclic compounds.
The ash content can be reduced by water washing or pickling. Its role is to quickly get adsorbent molecules into the smaller pores inside the activated carbon; The catalyst often precipitates in a small amount in the micropores, mostly in the macropores and mesopores. Mechanical properties of activated carbon (1) Particle size:
Labor costs are relatively low.08%. According to statistics from Nanjing Customs. To deal with the current situation in the industry. It has development potential. The high anti-dumping tax is a significant factor for Chinese activated carbon exports to the United States Dozens of Chinese companies that have been imposed high punitive tariffs mean they will lose the U. Annual global demand is growing at a rate of 3
https://www.china-graphiteelectrode.com/product/graphite-electrode/
At first glance, activated carbon is just an activated carbon, and the breakdown is hundreds of types of activated carbon. The quality of activated carbon varies with the production materials, production methods, and post-treatment. Quality also varies from application to application. Generally, the corresponding quality specifications and inspection methods are formulated for activated carbon for various purposes.
The items of quality specifications for various uses of activated carbon at home and abroad are summarized as follows: (1) Physical items: shape, appearance; mesh number, particle size, particle size distribution; apparent density, packing density; abrasion resistance; hardness; specific surface area; pore volume;
Floating rate; Strength; Thermal capacity; Thermal conductivity. (2) Chemical items: pH value; ash content; moisture, drying weight loss; ignition point; uncarbonized, burning residue; sulfide; chloride; cyanide; sulfate; acid soluble, nitric acid soluble; alcohol soluble ; Iron content; copper content; zinc content; potassium content; calcium and magnesium content; heavy metal content; water extraction; cadmium content; arsenic content; total nitrogen; phosphate; manganese; fluorescent substances; polycyclic aromatic compounds; tar products. (Plant-based raw materials) (3) Microbial project: Microbial limit.
For example, coconut charcoal has a variety of qualities and corresponding models: one type is used for water treatment applications that remove low concentrations of organic matter, one type is used for general liquid or gas phase applications, and one type is used for gold extraction; each type is further subdivided to make coconut shells have More than ten models; another example is reclaimed carbon reactivated from waste carbon. Its quality is outstanding in high density, high surface area, durability, and recyclability. There are about ten models. It can be seen that there are many varieties changed from quality, and there is great promise.
The items of quality specifications for various uses of activated carbon at home and abroad are summarized as follows: (1) Physical items: shape, appearance; mesh number, particle size, particle size distribution; apparent density, packing density; abrasion resistance; hardness; specific surface area; pore volume;
Floating rate; Strength; Thermal capacity; Thermal conductivity. (2) Chemical items: pH value; ash content; moisture, drying weight loss; ignition point; uncarbonized, burning residue; sulfide; chloride; cyanide; sulfate; acid soluble, nitric acid soluble; alcohol soluble ; Iron content; copper content; zinc content; potassium content; calcium and magnesium content; heavy metal content; water extraction; cadmium content; arsenic content; total nitrogen; phosphate; manganese; fluorescent substances; polycyclic aromatic compounds; tar products. (Plant-based raw materials) (3) Microbial project: Microbial limit.
For example, coconut charcoal has a variety of qualities and corresponding models: one type is used for water treatment applications that remove low concentrations of organic matter, one type is used for general liquid or gas phase applications, and one type is used for gold extraction; each type is further subdivided to make coconut shells have More than ten models; another example is reclaimed carbon reactivated from waste carbon. Its quality is outstanding in high density, high surface area, durability, and recyclability. There are about ten models. It can be seen that there are many varieties changed from quality, and there is great promise.
