2023-10-12

What is the heating principle of vacuum furnace heating graphite tubes?

The principle is to quantitatively inject the sample into a graphite tube using a sampler, and use the graphite tube as a resistance heating element. After being energized, the sample quickly heats up to achieve atomization. The heating power supply, maintenance gas control system, and graphite tube furnace are composed. An external power supply is added to both ends of the graphite tube to supply energy to the atomizer. The current flows through the graphite tube to generate a temperature of up to 3000 ℃, causing the measured element in the graphite tube to become ground state atomic vapor. The maintenance gas control system is used to control the instrument startup of maintenance gas, maintain the flow of Ar gas, and cut off the Ar gas flow after the air combustion is completed. The Ar gas in the external gas path flows along the outer wall of the graphite tube to maintain it from being burned, while the Ar gas in the internal path flows from both ends of the tube to the center of t

2023-08-03

Purification method of graphite

The flotation method is one of the conventional mineral purification methods that consumes less energy and reagents, and has lower costs. This is a major advantage of the flotation method for purifying graphite. However, when using the flotation method to purify graphite, it can only achieve a limited improvement in the grade of graphite. For flake graphite, using multi-stage grinding not only cannot completely dissociate its monomers, but also is not conducive to protecting the large flakes of graphite. Therefore, using flotation to further improve the graphite grade is not economical or scientific. To obtain high carbon graphite with a carbon content of over 99%, it is necessary to use chemical methods to purify the graphite.（1） Chlorination roasting methodThe low roasting temperature and low chlorine consumption of the chlorination roasting method greatly reduce the production cost of graphite. At the same time, the carbon content of graphite products is equivalent to that after tr

2023-02-21

What are the main uses of graphite carbon boards

What are the main uses of graphite carbon plates? The graphite carbon plates are high -quality graphite carbon raw materials, and the organic chemical complexes with strong alkali resistance are used. It is made of compression, vacuum pump pre -immersing, and high -temperature thermal treatment methods. It has extraordinary acid resistance. It is an idealized lining material for machinery and equipment such as ammonium sulfate reflection and ammonium sulfate storage tanks such as ammonium sulfate in the chemical manufacturing industry.Graphite products use high -quality graphite charcoal materials, coupled with organic chemical complexes with strong alkali resistance, reasonably reduce the pore rate of the product and improve the volume density of the product. Therefore, graphite products have excellent corrosion resistance and Strong abrasion resistance.Detailed description of graphite production and processing on graphite board:The main purpose:1. Failure-resistant material and lubr

2023-06-19

Information related to flake graphite?

There are still many people who do not know some basic information about flake graphite. Therefore, as a manufacturer, it is necessary for us to explain briefly. In fact, flake graphite is a natural crystalline graphite, shaped like fish phosphorus, belonging to Hexagonal crystal family, with a layered structure. Now it is also a natural solid lubricant with a layered structure, rich in resources and low in price. This product has the characteristics of complete crystallization, good thin plate toughness, excellent physical and chemical properties, thermal conductivity, conductivity, thermal shock resistance, corrosion resistance, etc. It is widely used in refractory materials and coatings in the metallurgical industry, such as magnesia carbon bricks, crucibles, etc. Pyrotechnic material stabilizer in military industry, desulfurization accelerator in smelting industry, pencil lead in light industry, carbon brush in electrical industry, electrode in battery industry, catalyst in fertil

2023-03-14

What are the main products of graphite products?

1. All kinds of high -pure graphite molds, graphite molds for continuous casting, sealing ring for chemical machinery, geological drill sintering molds, graphite heating elements, aluminum plug sticks and stirring rods, bottom bowl bases, poured tube, stream slot protection Set, graphite ring, roller, barboard, graphite, graphite board, graphite electrode, graphite precision device.2. Vajrayana products, saw blades, drilling molds, drill molds, roller molds, grinding wheels, 坩埚 and various alien molds.3. Distribute various high -quality high -quality graphite materials and special graphite G4 materials, electric sparks, cast materials, hoods, round materials, graphite powder.4. The products of our factory are widely used in various graphite products such as machinery chemical, mold, oil, textile, electromechanical, diamond sintering molds.

2023-04-03

Three processes Clean up graphite anode board

1. Preparation before work

The modification of scales graphite

The research of scales graphite is mainly focused on the modification and modification of its surface. Usually, the performance of the scales graphite is improved through physical and chemical methods. Cover, surface oxidation, gas deposition, mixing modification and other methods, let's explain in detail the modification and modification method of scales graphite in detail:1. High temperature heat treatmentAfter high temperature thermal treatment of scales graphite in the air environment, the graphite of graphite materials has been improved to a certain extent, and the arrangement of layer -like structures is more orderly. High -temperature thermal treatment can effectively remove defects with high activity, making the chemical reaction activity on the surface of the scale graphite.2. particle size controlScales graphite is a very sensitive substance in chemical reactions. In different environments, his resistance will change, that is, his resistance value will change, but one thing

2023-08-02

The difference between flake graphite and expanded graphite

Flake graphite is a type of natural graphite that, after being extracted and purified, generally appears in the form of fish scales, hence it is called flake graphite. Expandable graphite refers to flake graphite that, after acid washing and intercalation treatment, expands by about 300 times compared to the previous graphite. It can be used as raw materials for coils and flexible graphite. Below, let me introduce in detail the differences between flake graphite and expandable graphite:1. The use of flake graphite is more extensive than that of expandable graphiteIn industrial production, flake graphite not only has the function of expandable graphite, but also has much better conductivity, thermal conductivity, smoothness, and so on than expandable graphite. So its practical use in industry is becoming increasingly widespread.2. The production processes of flake graphite and expandable graphite are differentFlake graphite is mainly made by mechanical damage and grinding. Expandable g

2022-11-22

Carbon felt purification color principle

Carbon felt purification is widely used in actual industrial production. At the same time, everyone also found that carbon felt purification has many colors, and different colors have different characteristics and different applications. But carbon felt is a sewage crystal, and the color of carbon felt mainly depends on the loyalty and quantity of impurities in the crystal. The abrasive industry considers light blue to black as black carbon felt; colorless to green as green carbon felt.There are several explanations for the color of carbon felt. It is generally believed to be caused by the presence of foreign impurities. For example, when boron is introduced in the form of boron carbide, the crystal turns black; when the crystal contains nitrogen, it becomes green.The appearance color of carbon felt is not only related to the color of the crystal itself, but also related to the interference phenomenon of natural light on the crystal surface. When the thickness of the silicon oxide fil

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