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Time：2023.05.15Browse：1: Share:

One of the main purposes of graphite is to produce refractory materials, including refractory bricks, crickets, continuous casting powder, molding cores, mold casting, detergent and high temperature resistance. In recent years, the two important changes in the refractory material industry are that magnesium carbon bricks are widely used in the inside of the steelmaking furnace, and the application of aluminum carbon bricks in continuous casting. The refractory material for graphite is closely connected to the steelmaking industry, and the refractory material consumed by the steelmaking industry around the world.

Because graphite has many excellent performance, it has been widely used in industrial departments such as metallurgy, machinery, electrical, chemicals, textiles, and national defense. Can be used as refractory materials. Graphite products maintain the chemical characteristics of the original scales graphite and have strong self -lubrication performance. The characteristics of graphite powder are high-strength acid resistance, corrosion resistance and high temperature resistance of 3000 ° C, and low temperature-204 ° C. At the same time, its pressure resistance is greater than 800kg/cm2, and anti-oxidant, 1%weight in 450 ° C air, rebound rate in the rebound rate It is 15-50%(density 1.1-1.5). Therefore, graphite products are now widely used in metallurgical, chemical, petrochemical, high -energy physics, aerospace, electronics, etc.

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2023-03-03

Graphite material type detailed introduction

Graphite material Type introduced in detail Key suitable for multi -type and small total aluminum compulsory. In other words, if you want to change the type of aluminum alloy, you must only exchange graphite . Graphite can be divided into five types based on the main use and its type. Below, everyone will introduce the graphite type in detail.1. Basic type: The ratio of the ratio of external specifications to high width is about 0.7 to 0.8 to 1. The volume is#8 ~#4500.2. Long type: longer than the basic type, the proportion of external specifications to high width is about 0.6 to 0.7 to 1. There are#15 ～#620 on the volume.3. Bowl type: The exterior specifications are relatively large, and the proportion of specifications to high and width is about 1: 1. The volume is#250 ～#5200. The larger one -time melting aluminum alloy material is about 1.5 tons.4. Bringing the shape of the mouth: close to the long -shaped soup slot. The volume is#50 ～#1800.5. The heating furnace type: cylindric

2023-08-25

Factors affecting the gasification reaction of carbon materials

(1) Degree of graphitization: As the degree of graphitization of carbon materials increases, their activity towards gases decreases. The higher the final heat treatment temperature of carbon materials, the higher the temperature at which they begin to oxidize, so graphite products have a higher starting oxidation temperature than carbon products.(2) Structural state: Carbon materials with loose and porous surfaces are prone to react with gases. For example, the surface dense pyrolytic graphite treated at 3200 ℃ begins to oxidize in air at a temperature of 850 ℃, while the porous and loose charcoal on the surface begins to burn at 360 ℃.(3) Catalytic effect of impurities: Carbon materials contain impurities that have a significant impact on their gasification reaction, with varying catalytic effects. For example, iron, cobalt, nickel, copper, manganese, etc. are catalysts for the oxidation of carbon materials, while impurities such as boron, titanium, and tungsten have inhibitory effec

2023-05-19

Kish graphite structure

The crystal features of KISH graphite are manifested as layer -shaped branches crystal structure, as shown in Figure 1. When the front C is observed, the graphite hexagonal ring is almost overlapped and has branches, and the graphite A direction remains connected.Kishh graphiteFrom the KISH graphite inside the melt, first assembled in the fuse, and then floated to the surface of the liquid to form a volume knot. The KISH graphite directly generated from the surface is assembled on the surface.

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

2023-04-06

What are the characteristics of the thermal stability of the film -shaped graphite

Sheet -shaped graphite is a natural ore, with a thin piece or scale, and the aggregate is in the form of soil. It is a hidden crystal. Film graphite has many high -quality physical and chemical characteristics, including good thermal stability. Compared with other products, the thermal stability of film -like graphite has great advantages.Film graphite is one of the most high -temperature -resistant materials at present. Generally, the strength of the material is gradually decreased at high temperature. However, when heating to 2,000 degrees Celsius, the strength of the sheet -shaped graphite is twice the temperature at room temperature.Sheet -shaped graphite has excellent heat shock resistance. When the temperature suddenly changes, the thermal expansion coefficient is small, so it has good thermal stability. When the temperature changes rapidly, cracks will not occur.Sheet -shaped graphite is a material with excellent thermal shock. For graphite electrodes used in electric furnace s

2023-04-18

The application of scales graphite in the coating industry

The functional fillers of scales are mainly used for anti -corrosion coatings, fireproof coatings and conductive coatings.As an anticorrosive material, it has a good rust -proof primer made of charcoal black, talc powder and oil. It has good chemical resistance and solvent corrosion performance. If you add chemical pigments such as zinc yellow to the formula, its rust -proof effect is better. EssenceIt is used as a fireproof filler. It is expandable graphite. It is a graphite intervertebral compound obtained by natural graphite scales. 300 times) suffocating the flame, and at the same time, the expansion material is generated to achieve the effect of isolation of the flame, delay or interrupting the flame spread, and it is not burning, soft, high on the surface, and good coach layer. However, the volume and dosage of the expansion body should be appropriate. Tests show that 150um particles, 30%expansion multiple, and 5%of the amount are the most suitable.Scales graphite can be directl

2023-07-11

The price of graphite powder of graphite manufacturers is more cost -effective

Graphite manufacturers' colloidal graphite powder has a good lubrication performance, high cost -effectiveness, and catalytic reaction characteristics. It is very durable at the same time. It can be made into various products. Collagen graphite powder is commonly used as lead -acid batteries, conductive plates, high -capacity lithium battery positive and negative polar conductors, and thermal lubricating solution raw materials.The corporates of colloidal galgin powder of graphite manufacturers are often used below:1. Good moisturizing characteristics, commonly used as agricultural and animal husbandry organic fertilizer metal catalyst production process in the production process of the production process.2. It can withstand a high temperature of thousands of degrees, and is often used to resist thermal lubricating solution raw materials and anti -corrosion lubricating solution raw materials.3. Powder -unsurgical decrease agent and metal alloy raw materials, lubricating solution in cab

2023-04-06

The lubrication of sliced graphite is mainly reflected in two aspects

1. Silver-like Gention-Environmental atmospheric lubricationThe essence of lubrication of sheet -like graphite is its laminar crystal structure. The initial raw materials for preparation of expansion graphite are high -carbon -like graphite. Other chemical reagents such as concentrated sulfuric acid (more than 98%), hydrogen peroxide (more than 28%), and potassium permanganate are industrial -grade reagents. The general steps of preparation are as follows: At the appropriate temperature, add different proportion of hydrogen peroxide solution, natural scales and concentrated sulfuric acid to different programs, react for a certain period of time under continuous stirring, and then wash to neutrality, centrifugal, dehydrated, and dehydration. Dry vacuum at 60 ° C.2. Film graphite-solid lubricant and lubricant additiveThe lubrication performance of slices graphite is also affected by graphite particles. Some research and test results show that whether it is a natural piece of graphite or

2023-11-21

Material characteristics of graphite powder

Graphite powder is a substance that is very sensitive to chemical reactions. In different environments, its resistivity will change, which means its resistance value will change. However, there is one thing that does not change. Graphite powder is one of the good non-metallic conductive substances. As long as the graphite powder is kept uninterrupted in an insulated object, it will also be electrified like a thin wire. However, there is no accurate number for the resistance value, Because the thickness of graphite powder varies, the resistance value of graphite powder will also vary when used in different materials and environments. Due to its special structure, graphite has the following special properties:1) High temperature resistant type: The melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even after being ignited by an ultra-high temperature arc, the weight loss and thermal expansion coefficient are very small. The strength of graphite increases with te

2023-10-27

Maintenance and upkeep of graphite crucibles

The graphite crucible must be strictly protected from moisture and must be stored in a dry place or on a wooden frame. When handling graphite crucibles, it is important to handle them with care and prevent them from falling or shaking. Before using them, they should be baked in a drying equipment or by the furnace to raise the temperature to 500 ℃. The graphite crucible should be placed below the surface of the furnace mouth to prevent wear and tear on the furnace cover. When adding materials, it should be based on the solubility of the crucible, and too much material should not be added to prevent tightening the crucible. The furnace outlet and crucible clamp should conform to the shape of the crucible, and the clamp in the middle should prevent damage to the crucible due to stress on the department. When removing slag and coke from the inner and outer walls of the crucible, it should be gently knocked to prevent damage to the crucible. A suitable distance should be maintained betwee

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