2023-12-04

Precautions for using flake graphite?

Flake graphite is a natural crystalline graphite that resembles fish scales and belongs to the hexagonal crystal system with a layered structure. Therefore, it still has good properties such as high temperature resistance, conductivity, thermal conductivity, lubrication, plasticity, and acid and alkali resistance. Below are some precautions for using flake graphite?Flake graphite is a widely used product in the metallurgical industry for refractory materials and coatings. Such as magnesia carbon bricks, crucibles, etc. Now used as anti-corrosion material. Flake graphite is an anti rust primer made of carbon black, talc powder, and oil, which has good resistance to chemicals and solvents. If chemical pigments such as zinc yellow are added to the formula, its rust prevention effect will be better. When used, it has strong thermal shock resistance and good corrosion resistance, and is the main carbon raw material used in conjunction with refractory materials. It has a significant impact

2023-04-18

What are the characteristics of high pure graphite accessories molding graphite?

Graphite is a kind of homogenous alien body for carbon. It is gray -black, opaque and solid. The density is 2.25 grams per cubic centimeter, the melting point is 3652 ° C, and the boiling point is 4827 ° C. The chemical properties are stable, corrosion -resistant, and it is not easy to react with drugs such as acid and alkali. Burning carbon dioxide in oxygen at 687 ° C. Oxidation can be oxidized by strong oxidatives such as concentrated nitrate and potassium hydanol. It can be used as an anti -wear agent and lubricant. High purity graphite is used as a neutron decelerator in the atomic reactor. It can also be used to manufacture crickets, electrodes, brushes, dry batteries, graphite fibers, heat exchangers, coolers, electric arc furnaces, and arc furnaces, and electric arc furnaces, electric arc furnaces, and arc furnaces, and electric arc furnaces. Arc lights, pencils of pencils, etc.Due to its special structure, graphite has the following special nature:(1) High temperature resista

2023-03-28

What is the application scope of industrial graphite powder

What is the advantage of expanding graphite?

Compared with other adsorption agents, expansion graphite has many advantages. If the activated carbon is used for water removal, it will sink after the absorption of oil. At the same time as absorbing oil, it also absorbs water, which brings difficulty in post -treatment; the expansion graphite has a large absorption of oil, floating on the water after oil absorption, easy to catch and recycled, easy to use processing processing Cleaning, combustion, heating extraction and other methods will not form secondary pollution.

2023-08-24

Excellent characteristics of graphite plates

Graphite plate is a good technical property, and its good properties are widely used in various industries. Due to the excellent chemical and physical properties of the product, it has gradually become a key raw material for making grinding tools. Graphite belongs to the raw material of graphite carbon. During the production process, alkaline resistant organic chemical compounds are added, and then subjected to high-pressure manufacturing and forming. After undergoing high-temperature heat treatment, production and processing are carried out, thereby reducing the porosity of graphite products, improving the relative density of products, and possessing good alkali resistance and wear resistance. Graphite plates have high-quality characteristics and are suitable for industries such as forging, metallurgy, and grinding tools. CNC lathe processing machines and equipment further enhance the overall production and manufacturing level, and consider the requirements for precision and surface

2023-03-22

What are the causes of quenching cracks in high -strength graphite molds?

1. When the graphite mold is repaired and quenched, heating and quenching without annealing in the middle; 2. Excessive heating temperature for quenching is overheated or burned; 3. There are mechanical processing or cold plastic deformation stress in graphite mold; 4. There are severe mesh carbides in the material; 5. After quenching, the fire is not timely or the insulation time is insufficient; 6. Improper heat treatment operation of graphite mold. If heated or cooling is too fast, improper selection of quenching and cooling medium, low cooling temperature, too long cooling time, etc.; 7. When the graphite mold heats is processed by electric sparks, there are high stress stress and micro -cracks in the hardening layer; 8. The graphite mold is heat -treated and the grinding process is improper. 9. The shape of graphite mold is complex, unevenly thick, with sharp corners and thread holes, which make the heat stress and tissue stress too

2023-03-21

How to maintain graphite processing into graphite stick products?

1. During the use of graphite stick products, the graphite stick products are turned once a week to extend the life of graphite stick products;2. Using an appropriate amount of combustion agent, additives will reduce the life of graphite sticks;3. Keep a proper distance between the graphite stick and the wall of the furnace, and the graphite stick products should be placed in the furnace positive;4. When removing the inside of the graphite rod product, the inside of the wall of the graphite and sticking should be tapped to prevent damage to damaging graphite rod products;5. Graphite products are strictly preventing humidity. They must be placed on a dry place or wooden stand during storage.

2023-07-31

The results of graphene composite materials in the field of aluminum alloy corrosion protection

Graphene is a flat film composed of carbon atoms. It has only one carbon atom and is almost completely transparent. The graphene composite material has the characteristics of high strength, good toughness, excellent conducting thermal and thermal performance. Environmental purification and other fields have broad application prospects.Due to its large reserves, high strength, and good processability, aluminum alloy has been widely used in modern industries, military aerospace and civilian fields. loss. Therefore, it is important to do the anti -corrosion work of aluminum alloy materials.In this project, the composite of gallery oxide participating in self -made water -soluble nano -coating materials and rare earth passivation has a significant promotion effect on aluminum alloy anticorrosion. Among them, graphene alleviates environmental pollution caused by organic emissions, improves the coatings itself. Anti -environmental aging ability, rare earth replace toxic hexavalent chromium,

2023-06-06

Silicon fossil system

Chemical gas deposition (CVD) method) methodSilicon and carbon -containing gases have a heat decomposition through high -temperature graphite matrix, and SIC is deposited on the surface of the graphite matrix. The raw materials are trichloronetas (CH3SIC3), silicon chloride, hydrogen, silicon steam, etc. The deposition temperature range is wide, from 1175 ° C to 1775 ° C. The SIC layer generated by this method is very dense, the thickness is uniform, and the general thickness is about 0.1 to 0.3mm. However, the combination of SIC and graphite matrix is a combination of pure machinery, and the combination force is weak. When the temperature changes, the SIC layer is prone to cracking and peeling.Chemical Qi Evidence Method (CVR)The raw materials are coke powder and excessive quartz sand or non -fixed silicon powder. Chemical reactions occur when heated to 2000 ° C to generate SIO vapor. SIO steam and carbon -based reactions generate SIC. There is no obvious interface between SIC layers

2023-08-21

The main production process of graphite electrodes

(1) Calcination. Both petroleum coke and asphalt coke need to be calcined at a temperature of 1350 ℃ to fully remove the volatile matter contained in the carbonaceous raw material and improve the true density, mechanical strength, and conductivity of the coke.(2) Crushing, screening, and batching. Crush and screen the calcined carbon raw materials into designated size aggregate particles, grind some coke into fine powder, weigh according to the formula, and aggregate to form a dry mixture of various particles.(3) Mix and knead. Mix and knead the dry mixture of various particles with a certain amount of binder in a heating state to form a plastic paste.(4) Forming. Under external pressure (extrusion molding) or high-frequency vibration (vibration molding), the paste is pressed into a certain shape and high density of raw electrodes.(5) Roasting. Place the raw electrode in a specially designed roasting furnace, and use metallurgical coke powder to fill and cover the raw electrode. At a