Graphite products corrosion -resistant materials_Industry Dynamics_News

Graphite products corrosion -resistant materials

Time：2023.05.17Browse：1: Share:

Graphite has good chemical stability. After special processing graphite, it has the characteristics of corrosion resistance, good thermal conductivity, and low penetration rate. , Pump and other equipment. These devices are used in industrial departments such as petrochemical, wet metallurgy, acid -base production, synthetic fiber, and papermaking, which can save a lot of metal materials. 0 for casting, sandwiches, molding, and high temperature metallurgical materials, due to the small expansion coefficient of graphite, and can resist the changes in cold, cold and hot, can be used as the cast mold of glassware. After using graphite The rate is high, and it can be used without processing or processing, so a large amount of metal is saved. The production of hard alloy and other powder metallurgical processes is usually made of graphite materials to be used to durable souls. The crystal growth of single crystal silicon, regional refining containers, brackets, fixtures, inductive heater, etc. are all processed with high pure graphite. In addition, graphite can also be used as a vacuum -hungry heat heating plate and base, high -temperature resistance furnace pipe, rod, board, shed and other components.

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2023-10-18

What is the purpose of spherical graphite?

Spherical graphite has a wide range of market applications, widely used in industry, agriculture, and mining. It has a wide range of applications and is an important additive material in industrial production. So where are spherical graphite used.1. Spherical graphite as refractory material: The graphite structure and its related products have the properties of high temperature resistance and high strength, and can be mainly used in the metallurgical machinery industry for graphite crucibles and other manufacturing processes.2. Spherical graphite as a conductive material: used for manufacturing electrodes, carbon tubes, positive electrodes for mercury rectifiers, telephone parts, television tubes, etc.3. Spherical graphite as a wear-resistant lubricating material: graphite is commonly used as a lubricant in the mechanical industry. Lubricants typically cannot be used at high speeds, temperatures, and pressures, and wear-resistant materials can be graphite at high sliding speeds.4. The

2023-12-26

Graphite structure composition

Graphite is a transitional crystal between atomic crystals, metal crystals, and molecular crystals. In the crystal, covalent bonds are formed by sp2 hybridization between carbon atoms on the same layer. Each carbon atom is connected to three other carbon atoms, and six carbon atoms form a regular hexagonal ring on the same plane, extending to form a layered structure. Carbon atoms in the same plane each have one p orbital left, which overlaps with each other to form delocalized π - bonds. Electrons can freely move in the lattice and be excited, so graphite has a metallic luster and can conduct electricity and heat transfer. Due to the large distance between layers and the low bonding force (van der Waals force), each layer can slide, resulting in a lower density of graphite compared to diamond, a softer texture, and a smoother texture. [1]The distance between each layer of graphite is 3.40 Å, which is combined by van der Waals forces. The layers belong to molecular crystals, and the d

2023-09-25

graphite expansion graphite environmental materials

The effect of expanding graphite on water pollution has a large number of research results. In terms of governing oil and organic pollution in the control of water bodies, expansion graphite is far more effective and economical than ordinary activated carbon now. But expansion graphite is inconvenient to transport and needs to be prepared at the application site. The preparation, use, recycling, and regeneration of expansion graphite environmental protection materia

2023-03-28

Preparation of ultra -fine graphite powder

Graphite powder is soft, black and gray; it is greasy and can pollute paper. The chemical properties of graphite powder are relatively stable at normal temperature, insoluble in water, dilute acid, dilute alkali and organic solvents; the material has high temperature resistance resistance, which can be used for refractory materials, conductive materials, and wear -resistan

2023-10-27

Characteristics of graphite crucibles

Graphite crucibles have good thermal conductivity and high temperature resistance. During high-temperature use, their coefficient of thermal expansion is small, and they have certain strain resistance for rapid heating and cooling. Strong corrosion resistance to acid and alkaline solutions, with excellent chemical stability. Graphite crucibles, due to their excellent performance, are widely used in industries such as metallurgy, casting, machinery, and chemical engineering for the smelting of alloy tool steel and the melting of non-ferrous metals and their alloys. And it has good technical and economic effects. The production of domestic graphite crucibles has reached or even exceeded that of imported crucibles:1. The high density of graphite crucibles enables them to have good thermal conductivity;2. The graphite crucible has a specially made and dense molding material on its surface, greatly improving the corrosion resistance of the product and extending its service life;3. The ther

2023-05-05

Insufficient technical investment in domestic graphite powder production enterprises

As a policy of each graphite deep processing production company, it is far from reality. The single product function is not bad, but the stability of batch production is doubtful, and the consistency of each batch of products cannot be guaranteed. A professor of deep processing and production of graphite powder believes that the exchanges of different types of different types of information for the deep processing and production of graphite powder will be a long process. The gap between many companies is that they have excellent experiments but cannot produce in batches. The following editors analyze the reasons for the lack of technical investment in domestic graphite powder production enterprises:It is not related to the automation control of the company's production line, which is a systematic problem. At present, graphite powder deep processing production equipment accounts for more than half of the imported equipment. Graphite mineral resources are a very important strategic reso

2022-11-22

What are the steps of carbon felt purification?

Carbon felt is a major element in many alloy products, so carbon felt purification plays an important role in alloy production. Meanwhile, in the smelting process of metal silicon, silica, ore, etc. are usually used. Silicon slag will also be produced during the smelting process, and silicon slag also contains a certain amount of industrial carbon felt, so we can use carbon felt slag to further purify carbon felt.The first step is to separate the obvious light-colored slag and dark-colored slag from the silicon slag with a manual hammer, and then use the separation principle to further separate the silicon content in the silicon slag.Impurities in silicon slag exist in two forms: reduced and unreduced. In industrial silicon, a flocculant composed of Na2O5~50%, SiO250~95% or Na2O5~50%, SiO250~95%, MgO and CaO is added to industrial silicon. With 35% flux, the melting point of the slag can be reduced from the original 1450 to about 1480 and then down to about 1000. It can also reduce th

2023-10-26

Graphite electrode materials have the following six advantages

1、 Fast speed;Graphite discharge is 2-3 times faster than copper, and the material is not easily deformed. It has obvious advantages in the processing of thin ribbed electrodes. Copper has a softening point of around 1000 degrees, which is prone to deformation due to heating. The sublimation temperature of graphite is around 3650 degrees, and compared to copper, the thermal expansion coefficient of graphite material is only 1/30 of that of copper material;2、 Lightweight;The density of graphite is only 1/5 of that of copper. When using large electrodes for discharge machining, it can effectively reduce the burden on machine tools (EDM) and is more suitable for the application of large molds;3、 Low loss;Due to the presence of C atoms in spark oil, during discharge machining, high temperatures cause the C atoms in spark oil to decompose, forming a protective film on the surface of the graphite electrode, compensating for the loss of the graphite electrode;4、 No burrs;After the copper ele

2023-05-05

Graphite powder has the cause of self -lubrication performance analysis

Graphite powder is a wear -resistant material, and its self -lubrication performance is its most important feature. Graphn powder has a good self -lubrication performance due to its special layer -shaped crystal structure. The following are the analysis of the reasons for the self -lubricating property of graphite powder:The carbon atoms in graphite lattles are arranged in hexagonal on different planes. The distance between the carbon atoms in the same plane layer is 1.42 meters, and the distance between the carbon atom of each plane layer is 3.35. They are staggered along the same direction, repeat the position of the first plane in the third plane, the fourth plane repeats the position of the second plane, and so on. In each plane layer, because the carbon atoms are relatively tight, the binding forces between them are relatively large, and the carbon atom between layers and layers is far from each other, which is easy to separate and relatively slide. This is the main reason why gr

2023-05-04

Why add graphite powder to glass fiber?

Glass fiber enhanced plastic (FRP) is a composite composite material based on synthetic resin. It has the advantages of light weight, high strength, corrosion resistance, microwave transmission, electrical insulation, and reasonable performance design according to requirements. It has been widely used in aerospace, petrochemicals, transportation, construction, shipbuilding, machinery, environmental protection, textile and other fields. Glass fiber enhanced plastic (FRP) has good electrical insulation property. Under normal circumstances, the amount of graphite powder is 2.5 ~ 5%, which can reach 30 ~ 50%. So why add graphite powder to glass fiber?From an economic and technological perspective, it is best to choose inorganic abrasive materials, so the amount of graphite powder in the abrasion -resistant material of the glass fiber reinforcement is relatively large. In short, glass fiber wear -resistant materials, because its matrix is a polymer material, fills solid lubricants and vari

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