2022-11-23
2023-05-29As early as the 1930s, China Heilongjiang Jixi Liu Mao and Shandong South Villa Genti Mine began production and processing of pulse graphite. At that time, the mining process was simple, the workers had poor labor conditions, the productivity was extremely low, and the annual output was only thousands of tons. After decades of development, the output of mulberry graphite and carbon products in my country has risen rapidly. From 2004 to 2011, the compound annual growth rate of pulse graphite and carbon products reached 22.12%. In 2011, the output of my country's pulse graphics and carbon products was 25.5617 million tons, an increase of 21.98%year -on -year.Pulse graphite and carbon products have excellent performance, which are increasingly widely used, and production capacity and efficiency are growing rapidly. In 2011, the Chinese pulse graphite and the carbon products industry developed rapidly, and the industry in the industry had high management and control capabilities in cost a
2023-05-25Flexible graphite pads are cut from flexible graphite thin slices (or metal enhanced). They are divided into four types according to the needs of the application:1. Flexible graphite pads: cut from flexible graphite thin slices for pipeline flange and valve cover. It is recommended that this kind of pads are small diameter pads, depending on its low mechanical strength.2. Flexible graphite pad MI: The carbon steel sheet with hooks (0.2 mm thick) is sandwiched in the middle by flexible graphite thin slices, and then cut into a specific size. The mechanical strength is high.3. Flexible graphite pad PM: Flexible graphite thin slices are attached to the two sides of the 0.2 mm thick 304 stainless steel sheet. It has a high mechanical strength and is easy to transport. Because it can also be cut into a complex shape, this kind of pad film can be cut. Widely applied to various industries.4. Flexible graphite pad PM-A: Replace the stainless steel slices in T/#1215 to 316 steel (50 microns),
2023-05-25It is made of pure graphite board or metal (tooth plate, tablet, net) to enhance the cutting or stamping of graphite plates, with many excellent sealing performance, such as: heat stability, self -lubrication, corrosion resistance, non -aging, non -crispy, etc., in the place, in the case, in terms of The strict working conditions can be used for a long time, and rarely needs to be maintained. Different metal thin plates can be selected. The type of type can be optional, the inner wrap, the edge of the wrap, the inside and the outside.Graphite cutting pads are made from pure graphite board punching or cutting. It has good anti -corrosionability, high/low temperature, good compression back elasticity and high strength, a variety of round and complex complicated types of complicated Geometric pads are widely used in pipelines, valves, pumps, pressure vessels, heat exchangers, condenser, generators, air compressors, exhaust pipes, refrigerators, etc.
2023-05-25Graphite pads use medium: hot water, steam, oil, acid, alkali, ammonia, hydrogen, organic solvents, hydrocarbons, low -temperature liquids, etc.Maximum use pressure of graphite pads: 30MPa.Graphite pads use temperature: -200 ~ 650 ℃Enhanced graphite pads are made of flexible graphite belt or flexible graphite to prepare fillers, and they are suppressed into ring -shaped products of different sizes. It is suitable for media such as hot water, high temperature, high -pressure steam, thermal exchange solution, nitrogen, organic solvents, hydrocarbons, low temperature liquids and other media. Used for compressor, machine pump, valve, chemical instrument, instrument, etc.Asbestos contains carcinogenic substances, it has not been promoted to use, and developed countries have basically not used.
2023-05-24The formation process of graphite in cast iron is called graphization process. The basic process formed by cast iron tissue is the formation of graphite in cast iron.The graphite type and size of the gray cast iron depends on the graphite branches and growth rate in the common crystal group. When the common crystal group stops growing, the graphite will stop. They are separated and not connected. Using scanning electron microscope to observe the complete graphite in the common crystal groupThe three -dimensional form indicates that they are connected to each other. Only on the gold phase grinding surface is isolated.The national standard has the following divisions of the graphics of cast iron graphite: type A fine sheet, B -shaped flower shape, C -shaped thick blockbuster, D -shaped dot, E has directional points, f spider -like or planetary. The longest (100 times, greater than 100mm is 100mm. It is called 100mm long). The shortest graphite is the shortest (100 times at 100 times, le
2023-05-241. The oxidation and reduction method is used to synthesize graphene to prepare graphene modified electrodes to detect the four bases of DNA. Electrochemical research has found that graphene modifiers can achieve the four bases of DNA at the same time. The graphene and carbon nanotubes and β-cyclic paste are compounded. The carbon nanotuba effectively reduces the gathering of graphene. For high -sensitivity testing for berin nucleoside, the modified electrode can be promoted and applied to the determination of other biomolecules.2. The functionalization of biomolecular single-chain DNA (SSDNA) and graphene, and the prepared SSDNA-graphene composite materials can Stability. SSDNA-graphene composite material is larger than the surface area and has good biocompatibility. It is an excellent oxidation and restorease fixed material. Fix the SSDNA-graphene composite material to prepare glucose sensors for glucose oxidase. Glucose oxidase is realized directly electrochemical and maintains bio
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