2023-07-07

How to use expansion graphite

1. Protective useExpansion graphite can be used as protective materials, which can be used to protect metal and other damaged objects, such as circuit boards and steel. Because expansion graphite can expand 10 times, it can effectively block the flames and make these objects from burning with flames.2. InsulationExpansion graphite can also be used as insulation materials, because it has good thermal resistance and can effectively block heat, so it can be used for insulation, such as electronic products. It can also be used for cooling, preventing the loss of heat, thereby playing the role of heat preservation.3. Filtering useExpansion graphite can also be used as filtering materials, because it has adsorption and can be used to adsorb toxic substances, such as pollutants used in water treatment, which can effectively remove pollutants in water. It can also be used for air purification to block the entry of harmful substances.4. Reinforcement useExpansion graphite can also be used as r

2023-05-17

Nuclear energy uses graphite material

Graphite is one of the deceleration materials and reflective materials used in nuclear reactors. Early reactors are graphite heaps. The nuclear reactor for structural materials use graphite using raw materials, process control, and finished product inspection than graphite electrodes. The nuclear reactor must have the following performance with graphite , High heat shock, good deceleration performance to fast neutron, stable size under radiation, and very small impurities. Boron, cadmium and other elements that are easy to absorb neutron should be strictly controlled.Nuclear graphite must have a high volume density M because the deceleration of graphite on fast neutron is relying on the collision effect of fast neutron to carbon atoms. One of the main indicators of nuclear graphite M is also directly related to the pore rate and penetration rate of graphite. In order to avoid the loss of nuclear fuel and heat carrier, M should reduce the pores and penetration rates to a certain level.

2023-08-07

Impermeable graphite material

Impermeable graphite is an ideal material with good corrosion resistance and thermal conductivity in chemical production. It can be used to make heat exchangers, reaction tanks, absorption towers, gas combustion towers, hydrochloric acid synthesis furnaces, graphite centrifugal pumps, jet pumps, and various pipelines and joints. Impermeable graphite is divided into three categories:1. Impregnated impermeable graphite products - This is made by impregnating the graphite matrix. Impregnating agents not only reduce the porosity of graphite, but also increase the compressive strength and tensile strength of graphite materials by 1-2.5 times and 4-5 times respectively; Increase bending strength by 2-3 times; Increase the impact strength by 2-2.5 times. Commonly used impregnating agents include phenolic resin, furfural ketone resin, furfural alcohol resin, organic silicon resin, water glass, paraffin, divinylbenzene, asphalt, etc.2. Pressed impermeable graphite product - is a material made

2023-07-12

Precautions for using scales graphite?

Scales graphite is a product that is widely used in refractory materials and coatings in the metallurgical industry. Such as magnesium carbon bricks,。, etc. Now used as anticorrosive materials. Scales graphite is a rust -proof primer made of charcoal black, talc powder and oil, which has good chemical resistance and solvents. If you add chemical pigments such as zinc yellow to the formula, the rust -proof effect is better. During use, thermal shock resistance is strong and has good corrosion resistance. It is the main carbon raw material used in conjunction with refractory materials. It has an important impact on the brushing and high temperature intensity of carbon -binding materials such as magnesium carbon bricks. In the actual production process, carbon -combined refractory materials have strict requirements for the purity, gray, particle size and shape of the scales graphite. The structure and function of its high -temperature firing now depends to a large extent on the moisture

2023-04-20

What is the function of flake graphite in coated sand?

Coated sand refers to molding sand or core sand covered with a layer of solid resin film, and the use of flake graphite in coated sand is used to prevent peeling during the use of coated sand. Below, we will provide a detailed explanation of the functions of flake graphite in coated sand.The flake graphite used in coated sand is used as a lubricant in coated sand. The flake graphite used in coated sand can play a role in lubrication and high temperature resistance. The requirements for flake graphite used in coated sand are to have good lubrication performance and high melting point as a lubricant. And the flake graphite used for coated sand is made of natural flake graphite with good lubrication, which has been purified and processed to increase its carbon content. The melting point of flake graphite itself is high, and after production process processing, the high-temperature resistance of flake graphite used for coated sand will be higher, and the lubrication effect will be better.

2023-12-07

The difference and connection between graphite and graphene

The main difference between graphite and graphene lies in their structure. Graphite is a two-dimensional material with a hexagonal lattice formed by carbon atoms, and is an allotrope of carbon. And graphene is a type of material composed of carbon atoms in the form of sp ² A two-dimensional carbon nanomaterial with a hexagonal honeycomb lattice composed of hybrid orbitals is a single-layer structure of graphite. Therefore, graphite can be seen as a stacked form of graphene.Graphene has some unique physical and chemical properties, such as excellent conductivity and thermal conductivity, high strength, high toughness, etc., making it have broad application prospects in energy, materials, electronics and other fields. Due to its structure, graphite mainly has excellent lubrication and wear resistance, and is commonly used in the manufacturing of lubricants and wear-resistant materials.Although there are significant differences in structure and properties between graphite and graphene, t

2023-05-23

Graphite hot switch

Machining artificial graphite into the shape of the required, and then use resin immersion and solidification, which is made of non -transparent graphite products for thermal exchange. For chemical industry. include:(1) Block hole heat exchanger;(2) radial heat exchanger;(3) Membrane heat exchanger;(4) Tube heat exchanger.

2023-03-22

When cleaning graphite molds, there are still many precautions to understand

Systematic graphite mold maintenance is based on the coherence of maintenance needs and maintenance operations. In order to achieve the "cost -effectiveness" goal, cleaning graphite molds must be paid attention to. Formulate a detailed graphite mold cleaning plan. When cleaning the different parts of the graphite mold, such as cleaning inside the press, wiping along the edge, routine cleaning, and the main part of the cleaning, the cleaning operation method is also different. After the graphite mold runs a certain period of time and is tested by electroplating, magnetic labeling, and graphite molds in the ventilation holes and non -open air holes, the technical staff can determine the procedure and frequency of the graphite mold cleaning through the appearance inspection. Essence Therefore, it is very important to understand the cycle of the safe operation of graphite mold and the observation report of the accumulation and wear of residual objects inside the graphite mold. Based on gr

2023-03-27

The specific use of graphite

2023-09-04

Carbon products for aluminum and carbon blocks and crucibles for metallurgical furnaces

Aluminum (magnesium) electrolysis uses pre baked anodes and anode paste, mainly produced from petroleum coke and asphalt coke, sometimes with a small amount of artificial graphite added. China is rich in bauxite. Since the 1980s, the electrolytic aluminum industry has developed rapidly, and for every ton of aluminum produced, approximately 450KG of pre baked anode is required. Therefore, carbon for aluminum has developed rapidly. But anode paste, like electrode paste, is considered a phased out product.The content of boron, vanadium, nickel, and sodium in the raw materials for pre baked anodes should be strictly limited.Carbon blocks used in various metallurgical furnaces (such as the side blocks of ironmaking blast furnaces, ferroalloy furnaces, calcium carbide furnaces, and aluminum electrolysis cells) are all used at high temperatures, so carbon blocks should have high mechanical strength, good thermal stability, and corrosion resistance, but the requirements for ash content are no