2023-03-22

Selection and use of graphite

What are the choices of is used for refining, and usually the temperature is extremely high. Therefore, the raw materials for manufacturing should have high refractory resistance and have a strong high temperature resistance coefficient. There are also sufficient strength of ingredients. If the impact of high temperature, etc. during the smelting process, there will be wear. Therefore, if the strength of the raw material is not high, it is likely that the more waves will be used, and the more toughness will be lacking. The contraction coefficient must be small, and the temperature changes sharply without deformation and breaks. There must be not to afford the chemical response with the melted metal in the selection of materials, and the high temperature resistance of chemical metals should be high. Loss. When the melting metal is demanded at high temperature, the selection of should ensure that chemical stability at high temperature should be learned. It can be seen that there are a

2023-04-14

Can expand graphite development

Graphite crystals have a hexagonal layer -shaped structure composed of carbon elements. The carbon atoms on the layer of flat plane are combined with powerful covalent bonds. Therefore, under appropriate conditions, a variety of chemicals such as acid, alkaline metals, and salt can be inserted into the graphite layer, and a new chemical phase -Graphite Intercities on compounds (referred to GIC). When this intervertebral compound is heated to an appropriate temperature, it can quickly decompose instantly, generating a large amount of gas, so that the graphite is expanded into a new substance of worm -shaped, that is, the expansion of the intervertebral compound of the expansion. graphite.The expansion graphite was first discovered by the German SChaufautl. In 1841, Schaufautl soaked natural graphite in a mixture of thick HNO3 and thick H2SO4. In 1963, he first applied for expanding graphite manufacturing technology patents and industrialized production in 1968.The above is some of the

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

2023-04-24

Which of the scale of the number of meters is more?

Scales graphite has many specifications. Different specifications are determined according to different goals. The number of scale graphite ranges from 50 ~ 12000 mesh. A specification of scales graphite, so why is the 325 -purpose scales graphite application very wide? The following Jinhui graphite editor will analyze it in detail:Scales graphite is a natural scales graphite as the processing raw material. After machinery, it can be crushed to 325 mesh graphite powder. The 325 -mesh scales graphite is purified and other processed. It can be processed into a carbon -containing 325 -mesh graphite powder with a carbon content of 99%or 99.9%. Such a 325 -mesh scales graphite has good conductivity, high temperature resistance, and lubrication performance. The use of high carbon -containing 325 mesh scales graphite is used in different industrial production areas.Graphite powder is processed and highly purified on the basis of scales graphite to remove impurities, so that the purpose of 32

2023-05-29

Features and uses of graphite

Maximum use temperature 1000 (℃)Material high -pure graphite heating coefficient 74554 (W/(m.k)))(1) Features and usesIt has excellent thermal stability, chemical corrosion resistance, good compression and recovery, low thermal stress relaxation, strong compensation capacity of the sealing surface, and long service life. The compressor, various cylinder pads and high -strength graphite pads of the internal combustion engine, instead of metal wound pads. Used for seals in various pipelines, valves, pumps, heat exchangers, towers, human holes, hand holes and other flanges(2) Performance indicators:Voltitude: 0 ～ 25MPaTemperature resistance: -200 ～ 1000 ℃ (except for strong oxidant)Thickness: 1.0 ～ 4.5mmLine speed: 0 ～ 15m/sPH value: 1 ～ 14

2023-04-25

What is the role of scales when galgling?

The application of scales graphite is widely used in industries. Mulchogenic sand is one of the applications of them. Cover sand refers to the sand or core sand with a solid resin film on the surface of the sand grain. In the middle, scales need to be used. Today, I will explain what the scales have the functions when gog graphic is covered with membrane sand:The scaled graphite is used as a lubricant in the lubricant in the sandy sand. The littering of the luster sand can play a lubrication and high temperature resistant role in the sandwich sand. For the requirements of scales with scales in gifsta, it is required to be lubricated as a lubricant and high melting point, and the littering of the lubrication is a natural scale graphite with good lubrication. Carbon content. The melting point of the scale graphite itself is very high. After the production process processing, the high temperature resistance of scales graphite with scales with scales will be higher, and the lubrication ef

2023-04-21

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

The relationship between scales graphite and nuclear graphite

1. Different applications of scales graphite and nuclear graphite.Scales graphite has excellent performance such as high temperature resistance, heat conduction, conductivity, lubrication and other excellent performance. It is an indispensable resource for the cultivation of the development of emerging industries and the transformation and upgrading of traditional industries. The nuclear graphite is mainly used as graphite materials in the nuclear industry, including the atomic reactor with neutron chronic agents and reflexes, the production of hot column graphite for the production of isotopes, and the spherical graphite and block graphite for high -temperature gas and cold piles.2. Scales graphite and nuclear graphite are different branches of graphite materials.Graphite -like crystals are complete, thin and tough, their physical and chemical properties are stable, and they have good temperature resistance, lubrication, conductivity, heat shock resistance, corrosion resistance and a

2023-10-23

Operating Techniques for Graphite Crucibles

Graphite crucible is a very excellent smelting tool that has been praised by people in the metal smelting industry. Its usage method is simple. Below, we will introduce some matters that need to be mastered when using it.The main uses of graphite crucibles include evaporation, concentration or crystallization of solutions, and burning of solid substances. It should be noted that although graphite crucibles have strong temperature adaptability and can be directly heated, they cannot be suddenly cooled after heating. If necessary, use crucible pliers to remove the crucible instead of using technical means to quickly cool it. Because it is directly heated and the heated contents are metals with extremely high dissolution temperatures, the required energy and safety requirements are relatively high. Therefore, during the heating process of the crucible, it is necessary to have a stable environment to ensure the safety and effectiveness of the operation. In general, manufacturers choose to

2023-05-23

Graphite electrode

It is mainly based on petroleum coke and needle -shaped coke, and coal pettea is used as a binding agent. The heating conductor can be divided into ordinary power, high power and ultra -high power according to its quality indicators. Graphite electrodes include:(1) Ordinary power graphite electrode. Allowing a graphite electrode with a current density of less than 17A/cm 2, it is mainly used for ordinary power furnaces such as steelmaking, silicon, and yellow phosphorus.(2) Antioxidant coating graphite electrode. A graphite electrode with a layer of antioxidant protective layer is coated on the surface, forming a protective layer that can conduct electricity and high temperature resistant oxidation, and reduce the electrode consumption during steelmaking.(3) High -power graphite electrode. Allowing a graphite electrode with a current density of 18 to 25A/cm 2, it is mainly used for high -power arc furnaces for steelmaking.(4) Ultra -high -power graphite electrode. Allows the use of gr