2023-09-04

How are graphite electrodes consumed in electric furnace steelmaking?

The consumption of graphite electrodes is mainly related to the quality of the electrodes themselves, as well as to steelmaking operations and processes.(1) Electrode end consumption. Its consumption includes the sublimation of graphite material caused by high arc temperature, as well as the loss of chemical reactions between the electrode end and molten steel and slag. The electrode end consumption is also related to whether the electrode is inserted into the molten steel to increase.(2) Oxidation loss on the outer surface of the electrode. In recent years, in order to improve the smelting rate of electric furnaces, oxygen blowing has been widely used, which has led to an increase in electrode oxidation losses. In general, the oxidation loss on the outer circular surface of the electrode accounts for about 50% of the total electrode consumption.(3) Residual loss of electrodes or connectors. A small section of electrode or connector that is continuously used at the connection between

2023-06-12

Production and Application of Battery Specific Graphite

Battery materials have always been a highly concerned field in the new energy industry. Among them, graphite, as a type of battery material, has been widely used due to its good conductivity, high-temperature stability, and corrosion resistance. This article will introduce the production and application of battery specific graphite, explore its advantages and future development prospects in the field of batteriesFirstly, the application of graphite as a battery material is mainly reflected in lithium-ion batteries. At present, lithium-ion batteries have become an important driving force in the fields of electric vehicles, mobile phones, and other fields. Among them, graphite, as the negative electrode material of lithium-ion batteries, has high energy density, long life, and other characteristics, and is widely used. The production process mainly includes steps such as carbonization, drying, ball milling, and screening. Among them, the selection of raw materials and the optimization o

2023-10-17

How is expanded graphite produced?

Due to the fact that graphite is a non-polar material, it is difficult to intercalate with small polar organic or inorganic acids alone, so oxidants are usually required. The chemical oxidation method generally involves soaking natural flake graphite in a solution of oxidants and intercalators. Under the action of strong oxidants, graphite is oxidized, causing the neutral network of planar macromolecules in the graphite layer to become positively charged planar macromolecules. Due to the extrusion effect of isotropic positive charges between positively charged planar macromolecules, the spacing between graphite layers increases, and the intercalation agent is inserted between the graphite layers to form expanded graphite.Expanded graphite will rapidly shrink when heated at high temperatures, with shrinkage times reaching tens to hundreds or even thousands of times. The apparent volume of contracted graphite reaches 250-300 milliliters/gram or more. The shrunken graphite is in the shap

2023-07-27

One article understands natural scales graphite surface modification methods

Natural scales graphite is a high -quality refractory raw material, but it is difficult to prepare uniform and dense non -fixed refractory materials because the surface of graphite has hydrophobicity. Therefore, the surface of the graphite needs to be modified so that the surface is changed from hydrophobic to hydrophilic, in order to enable graphite to be widely used in refractory materials. Generally speaking, most of the surface modification uses the modified agent to modify the powder. The following introduces a variety of graphite modification methods.First, the wetness of scales graphite and its application limitations. There is no shortage of graphite area, with small surface tension, and about 0.45%of volatile organic objects on the surface, all of which make the wetness of graphite worse. The strong hydrophobicity of the graphite surface makes the fluidity of the pouring materials worse, graphite is easy to reunite, it is difficult to prepare uniform and dense non -fixed -sha

2023-07-19

What are the advantages of high pure graphite?

Simplified graphite is an inorganic non -metallic material. High -pure graphite is a common advantage in processing and manufacturing structure casting molds, exercise of high -pure metal, sintering mold, metal coating, and transmitting electron tube. High pure graphite has corrosion resistance, the substrate is uniform and small, delaying the degree of corrosion of the product. In addition, it also has high thermality. High -content fixed carbon ensures good thermal conductivity, shorten the dissolution time, and significantly reduces energy consumption. In particular, its quality stability, the manufacturing technology and quality assurance system of high -voltage molding methods fully ensure quality stability. If graphite molds and graphite processing products of various shapes and uses can be achieved in the metallurgical industry, graphite with accuracy and roughness can be processed. High -pure graphite is specially designed according to the conditions of rapid heating and fast

2023-04-20

Optical and mechanical properties of graphene

Graphene has excellent optical properties, with an absorption rate of about 2.3% over a wide wavelength range, making it almost transparent. Within the thickness range of several layers of graphene, with each increase in thickness, the absorption rate increases by 2.3%. Large area graphene films also have excellent optical properties, and their optical properties change wi

2023-06-07

Graphite physicss

The chemical properties of single -mass carbon at room temperature are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; burning with oxygen at different high temperatures to generate carbon dioxide or carbon dioxide; Below, single -quality carbon is more likely to be oxidized by acid; at high temperature, carbon can also react with many metals to generate metal carbides. Carbon is restored and can smell metal at high temperature.Graphite is soft, black and gray; it is greasy and can contaminate paper. The hardness is 1-2, and the hardness can be increased to 3 to 5 along the vertical direction. The proportion is 1.9 ～ 2.3. The surface area is concentrated at 1-20m2/g. Under the isolation of oxygen conditions, its melting point is above 3000 ° C. It is one of the most temperature-resistant minerals. It can conduct electricity and heat conduction.There is no pure graphite in nature, which often contains impurities such as SIO2, Al2O3, Feo, CAO, P2O

2023-04-21

What should be paid attention to when processing refractory materials with flake graphite?

Electromagnetic properties of carbon and graphite

Artificial graphite is not necessarily a good conductor of electricity, but structurally belongs to the so-called polycrystalline graphite. Polycrystalline graphite is a carbon material with good graphitization performance obtained by heating at high temperatures. Carbon materials are generally obtained by treating organic matter in a reducing atmosphere, inert atmosphere, or vacuum. The carbon material obtained by heating below 1000 ℃ is not called carbonized material, but rather considered as an insulator. Only by heating the carbonized material above 1000 ℃ can the specific resistance rapidly decrease and become a good conductor of electricity. The polycrystalline graphite obtained by this method is still a carbon material in a sense, and artificial graphite requires temperature treatment above 2500 ℃ under atmospheric pressure. The change in electrical properties of carbon materials and carbides during simultaneous heating treatment is a very interesting and profound issue.A solid

2023-05-10

The adaptability of the scale graphite to temperature

Scales graphite is a natural graphite. It is usually a thin piece or scale form. It has a strong adaptability to high temperature and has a strong heat shock resistance. The scale of the scale is added to the production of many products, which enhances the product's ability to work at high temperature. Today, the editor will explain the adaptability of the scale graphite to temperature:Scales graphite has very good high temperature resistance and is one of the high -temperature resistance materials. When higher than 2000 degrees, the general material will appear in a melting state, or it has become a gas, and even some difficult melting metals will lose strength at about 2500 degrees. 3600 degrees, but the scale graphite will not melt at this temperature. The melting point is 3850 degrees.If several high -temperature -resistant materials are placed at 7000 degrees of ultra -high temperature arc for 10 seconds, the losses of scales graphite are extremely small. According to the weight