Time：2023.05.15Browse：1
How to avoid the corrosion of the equipment on the equipment, thereby reducing equipment investment and maintenance costs, and improving production efficiency and profits is a problem that each chemical enterprise always needs to solve. Many products are resistant to corrosion but not high temperature, but scales graphite has both advantages. The following editors will introduce the problem of the device corrosion in detail how to solve the equipment of the scales:
1. Excellent thermal conductivity. Scales graphite also has good thermal conductivity. It is the only non -metallic material with a thermal conductivity higher than the metal. The thermal conductivity coefficient is 2 times that of carbon steel and 7 times that of stainless steel. Therefore, it is suitable for heat transfer equipment.
2. Excellent corrosion resistance. Various types of carbon and graphite have excellent corrosion resistance to all concentrations of hydrochloric acid, phosphate, and hydrofluoric acid, including fluoride-containing medium. The use temperature is 350 ° C-400 ° C. It is the temperature that starts to oxidize the oxidation of carbon and graphite.
3. Tolerance to a certain high temperature. The use temperature of scales graphite depends on the type of immersion material, such as phenolic graphite impregnation graphite to resist 170-200 ° C. If an appropriate amount of silicon resin is impregnated with graphite, it can withstand up to 350 ° C; when phosphate is deposited on carbon and graphite, it can improve the antioxidant capacity of carbon and graphite, and further improve the actual operating temperature.
4. The surface is not easy to structure. The scales graphite is very small with most media, so it is not easy to attach dirt on the surface, especially suitable for condensing equipment and crystalline equipment.
2023-04-20Graphene already exists in nature, but it is difficult to peel off a single layer structure. Graphene is stacked layer by layer to form graphite, with a thickness of 1 millimeter containing approximately 3 million layers of graphene. A pencil lightly scratches on paper, leaving traces that may be several or even just one layer of graphene.
1. High thermal conductivity: Due to the use of raw materials such as graphite with high thermal conductivity, the melting time is shortened.2. Heat resistance and shock resistance: Strong heat resistance and shock resistance, resistant to cracking during rapid cooling and heating.3. High heat resistance: High fire resistance, capable of withstanding high temperatures ranging from 1200 to 1600 ℃.4. Erosion resistance: Strong resistance to erosion of molten soup.5. Resistance to mechanical impact: Having a certain degree of strength to resist mechanical impact (such as the input of molten materials).6. Oxidation resistance: Graphite is prone to oxidation at high temperatures in oxidation aerosols, and due to oxidation prevention treatment, oxidation consumption is relatively low.7. Anti adhesion: Because graphite has the characteristic of not easily adhering to molten soup, the immersion and adhesion of molten soup are less.2023-08-21Main characteristics of graphite crucible
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There are weak van der Waals forces between layers in the structure of graphite, and these interactions are disrupted under high temperature conditions, leading to interlayer detachment of graphite.
As 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 a2023-12-12Graphite heater
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