Huixian Zhongtai Abrasives Mould Manufacturing Co. , Ltd.

Graphite Material(2022年08月19日)

zhongtaigraphite — 2022-08-18T16:17:00+0900

https://www.zhongtaigraphite.com/products/graphite-material/

This kind of silicon carbide graphite is molded by 10000 tons hydraulic press and then roasted for several months to make the finished product. Therefore, carbon graphite composite material has high purity and good physical properties. It is widely used in the metallurgical industry, advanced refractory coating, military pyrotechnic material stabilizer, pencil lead for light industry, carbon brush for electronic industry, an electrode for the battery industry, catalyst additive for the chemical fertilizer industry, etc.

High Purity and Advanced Graphite Materials
High purity graphite is a kind of graphite with high purity, and its content is more than 99.9%. It has the advantages of small resistance coefficient, high-temperature resistance, corrosion resistance, oxidation resistance, thermal shock resistance, good conductivity, small thermal expansion coefficient, self-lubrication, easy precision machining, and so on.

Medium And Coarse Graphite Material
The particle size of medium and coarse graphite raw materials is 0.2, 0.4, 0.8, 2, and 4mm, and the density is between 1.55 and 1.75. It has the characteristics of low resistivity, oxidation resistance, corrosion resistance, high-temperature resistance, and good conductivity.

Isostatic Pressing Graphite Material
Isostatic pressing carbon graphite material is made of high-quality petroleum coke and asphalt coke as the main raw materials through pulverization (the average particle diameter is less than 25) μm) Graphite products are made by, kneading, binding, isostatic pressing, roasting, impregnation, graphitization, and other processes.

Briefly introduce the purification method of carbon graphite material

Graphite purification: there are two methods, chemical purification and physical purification.

1. Chemical purification: it is to use the acid, alkali, and corrosion resistance of graphite to treat graphite concentrate with acid and alkali to dissolve impurities and then wash them away to improve the grade of concentrate. High carbon graphite with a 99% grade can be obtained by chemical purification. There are many methods for chemical purification, and the sodium hydroxide high-temperature melting method is widely used in China.

The basic principle is to make impurities (mainly silicate minerals) in graphite react with caustic soda (NaOH) at a high temperature above 500 ℃ to form water-soluble reactants. The reactants can be leached with water to remove some impurities. Another part of impurities, such as iron oxide, can be neutralized with HCl after alkali melting to form soluble ferric chloride, which can be removed by washing with water.

2.Physical purification: that is, high-temperature purification, using the high-temperature resistance of silicon carbide graphite, put it in the electric furnace, isolate the air, and heat it to 2500 ℃, so that the ash (i.e. impurities) can be volatilized, so as to improve the concentrate grade. High purity graphite with 99.9% grade can be obtained by high-temperature purification.

The difference between high purity graphite and graphitized materials
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The ash content is different
1. The carbon content of high purity graphite is more than 99.99%, the ash content and impurity content are very low, generally less than 0.001%.

2. The carbon content of ordinary graphitized materials is more than 99%, and the ash and impurity content is about 0.5%.

The production process is different
1. High purity graphite is usually produced by the high-temperature purification graphitization process.

2. Ordinary graphitized materials are produced by the conventional graphitization process.

Different uses
1. High purity graphite is an ideal inorganic non-metallic material with the advantages of high strength, good thermal shock resistance, high-temperature resistance, oxidation resistance, small resistance coefficient, corrosion resistance and easy precision machining. It is used for manufacturing electric heating elements, structural casting mould, crucible boats for smelting high purity metal, heater for single crystal furnace, graphite for EDM, sintering mould, an anode for electron tube, metal coating, graphite crucible for semiconductor technology, graphite anode and grid for transmitting electron tube, thyratron and mercury arc rectifier.

3.Ordinary graphitized materials play an important role in a wide range of fields, such as sealing, temperature resistance, corrosion resistance, electrical conductivity, heat preservation, compression resistance, wear resistance, oxidation resistance, and so on.
The difference between graphite material and carbon material

Graphite: hexagonal crystalline carbon molecular structure
1. Graphite has artificial graphite and natural graphite

Artificial graphite: refers to the deep processing of carbon materials classified as amorphous carbon, which improves the purity of carbon and further increases the proportion of graphite crystal structure (graphite materials obtained later).

Natural graphite ore: flake graphite and earthy graphite, among which flake graphite is the better natural graphite.

2. Graphite is an electric conductor

Graphite is a kind of allotrope of the element carbon. The periphery of each carbon atom is connected with the other three carbon atoms (arranged in honeycomb-like hexagon) to form covalent molecules by covalent bonds. Because each carbon atom emits an electron, and those electrons can move freely, graphite is a conductor.

Carbon materials: amorphous carbon molecular structure
Carbon products often used in the industry generally refer to carbon products purified from amorphous carbon raw materials (such as pitch coke, coal, petroleum coke, etc.). In terms of appearance, common carbon products have large volumes, such as carbon radiator, metallurgical electrode, lining brick (carbon block) of the smelting furnace, etc.

Like graphite, carbon materials can be made into refractories, electrodes, and other industrial products. However, due to their excellent properties, graphite composite materials are widely used in various industries, such as metallurgy, petrochemical, mechanical industry, electronic industry, nuclear industry, and national defense.

Now the cost of graphite is low, if you have any needs, please contact us.

Graphite Electrode(2022年08月23日)

zhongtaigraphite — 2022-08-18T16:12:53+0900

https://www.zhongtaigraphite.com/products/graphite-electrode/

Graphite electrode is a kind of high-temperature-resistant graphite conductive material, which is made of petroleum coke and pitch coke as granular materials, coal tar pitch as binder, through kneading, molding, roasting, graphitization, and machining. Carbon graphite electrode is an important high-temperature conductive material for EAF steelmaking. It inputs electric energy to EAF through graphite electrode and uses the high temperature generated by the arc between the electrode end and the charge as the heat source to melt the charge for steelmaking. Electrode de graphite is often used as a conductive material in other electric smelting or electrolysis equipment.

Graphite Electrode Application
Ordinary power graphite electrode is allowed to use graphite electrode with a current density less than 17a / cm2. It is mainly used in ordinary power electric furnaces for steelmaking, silicon smelting, and yellow phosphorus smelting.

The invention relates to an oxidation-resistant coating graphite electrode, and a graphite electrode coated with an oxidation-resistant protective layer (graphite electrode antioxidant). The formation of both conductive and high-temperature oxidation-resistant protective layers can reduce the electrode consumption (19% ~ 50%), prolong the service life of the electrode (22% ~ 60%), and reduce the electric energy consumption of the electrode.

High power carbon graphite electrode, allowing the use of current density of 18 ~ 25A / cm2 graphite electrode, mainly used in steel-making high power electric arc furnace.

Ultra-high power graphite electrode. Graphite electrode with a current density greater than 25A / cm2 is allowed. It is mainly used in ultra-high power EAF.

How to use graphite electrode

1. First of all, we need to wipe the protective cap on the opening to detect the integrity of the electrode thread.

2. On the premise of determining the integrity, the next step is to clean the internal thread of the hole and the surface of the spare graphite electrode.

3. Insert the connector into the electrode hole and connect the electrode sling to the other end.

4. When dropping the carbon graphite electrode, be careful not to let the electrode collide with other fixing devices.

5. Hang the spare electrode above the electrode to be connected. When the distance between the two electrode ends is 10-20 mm, clean the exposed parts of the two electrode ends and the joint again with compressed air. It should be lighter to avoid the damage of the electrode hole and the thread of the joint.

6.Just tighten the spark electrode.

As professional graphite electrode manufacturers, we have types of related products for sale, and the graphite electrode price china is affordable, if you have needs to buy graphite electrode, please contact us.

Graphite Crucible(2022年08月22日)

zhongtaigraphite — 2022-08-18T16:09:26+0900

https://www.zhongtaigraphite.com/products/graphite-crucible/

The main raw material of carbon graphite crucible is crystalline natural graphite. Therefore, it maintains the original physical and chemical properties of natural graphite. That is: it has good thermal conductivity and high-temperature resistance. In the process of high-temperature use, the coefficient of thermal expansion is small, and it has certain strain resistance to rapid heating and rapid cooling. It has strong corrosion resistance to acid and alkaline solutions and excellent chemical stability. There are many types and specifications of the graphite casting crucible, which are not limited by the production scale, batch size, and the variety of melting material. It can be selected at will, and has strong applicability, and can ensure the purity of melting material.

Application of Graphite Crucible
Graphite crucible china has obvious characteristics and is widely used. The graphite crucible for fire heating is mainly used for smelting copper, aluminum, alloy and other non-ferrous metals. Due to the reasonable design, advanced structure, novel material and low energy consumption compared with the same type of furnace, graphite crucible has been used in many fields, using clean energy such as natural gas or liquefied gas as fuel with less pollution. Resistance furnace high purity graphite crucible is mainly used for melting gold, silver and rare metals.

The graphite crucible has a small coefficient of thermal expansion. It has a strong resistance to strain for both extremely hot and extremely cold. It is resistant to strong acid and alkali, and can be used for heating a variety of liquids; In addition to chemistry, graphite crucible is widely used in metallurgy, casting, machinery, chemical industry and other departments; Graphite crucible is made of natural graphite, which keeps the original excellent characteristics of graphite. It is used to make heating element and heat shield of vacuum furnace, and also used to make structural parts such as bracket, material tray, guide rail, bolt, bearing, fan blade and so on. The application of graphite crucible in vacuum furnace greatly simplifies the design and manufacture of vacuum furnace, reduces the consumption of metals such as tungsten, molybdenum, tantalum and stainless steel, reduces the cost, improves some properties of vacuum furnace and expands the application scope of vacuum furnace.

Graphite Crucible Uses
Put it in a dry place after use, and avoid rainwater intrusion; Bake slowly to 500 ℃ before use.

According to the capacity of the carbon graphite crucible, do not squeeze too tightly, so as to avoid the metal thermal expansion cracking the crucible.

When taking out the molten metal, scoop it out with a spoon, and useless calipers as far as possible. If calipers and other tools are used, they should be consistent with the shape of the crucible, so as to avoid local excessive stress and shorten the service life.

The service life of the graphite casting crucible is related to its usage. It should be avoided that the strong oxidation flame is sprayed directly on the crucible, which shortens the service life of the raw material.

As professional graphite crucible factory, we have types of related products for sale, anything you need, please contact us.

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Graphite Block For Vacuum Furnace(2022年08月21日)

zhongtaigraphite — 2022-08-18T16:06:30+0900

https://www.zhongtaigraphite.com/products/graphite-block-for-vacuum-furnace/

Vacuum furnace graphite has good vacuum performance, thermal conductivity, low coefficient of thermal expansion, increased strength with the increase of temperature, good processing technology, and low cost, so it is a kind of high-quality and low-cost material. Graphite block for vacuum furnace is not only used to manufacture heating elements and heat insulation screens of vacuum furnaces, but also used to manufacture stressed structural parts such as supports, material trays, guide rails, bolts, bearings, fan blades, and so on. Its application in vacuum furnaces greatly simplifies the design and manufacture of vacuum furnaces, reduces the consumption of metals such as tungsten, molybdenum, tantalum, and stainless steel, reduces the cost, improves some properties of vacuum furnace and expands the application range of vacuum furnace.

Advantages of Graphite for Vacuum Furnace
01
Vacuum furnace graphite has good high-temperature strength. At room temperature, the strength of graphite is much worse than that of metal, but its strength increases gradually with the increase of temperature, which will exceed all oxides and metals;

02
Vacuum furnace graphite is easy to obtain and cheaper than metal;

03
Graphite raw material has some properties of metals and ceramics, good electrical and thermal conductivity, multi porosity, and small coefficient of thermal expansion. Therefore, graphite has become one of the most heat-resistant and shock-resistant materials;

04
Vacuum furnace graphite has a small resistance temperature coefficient and low thermal inertia. It can be heated and cooled quickly. It has no special requirements in the process of workpiece treatment. It is more suitable for the application of a vacuum furnace heat generator;

05
It is a relatively good heating body of a vacuum furnace. Vacuum furnace graphite has the advantages of high-temperature resistance, no deformation, impact resistance, large radiation area, good flexibility, and easy processing and installation. In terms of electricity, it is easy to make large heating elements, which can increase voltage, reduce current and save heat loss.

The Chemical Properties Of Carbon In Vacuum Furnace Graphite Block at room temperature, it is relatively stable and insoluble in water, dilute acid, dilute alkali, and organic solvents; react and burn with oxygen at different high temperatures to produce carbon dioxide or carbon monoxide; in halogen, only fluorine can react directly with elemental carbon; under heating, elemental carbon is easy to be oxidized by acid; at high temperatures, carbon can also react with many metals to form metal carbides.

Application of Graphite Block for Vacuum Furnace

Vacuum furnace graphite is not only used to manufacture heating elements and heat shields of vacuum furnaces but also used to manufacture stressed structural parts such as support, material plate, guide rail, bolt, bearing, fan blade, and so on. It is also used in silicon carbide furnaces, graphitization furnaces, and other metallurgical furnaces, resistance furnaces as furnace lining and conductive materials, as well as the impermeable graphite heat exchanger, electronics, metallurgy, chemical industry, steel, and other fields.

Now the price of carbon & graphite products is affordable, if you have needs to buy any carbon graphite powder, please contact us.

Graphite Block(2022年08月20日)

zhongtaigraphite — 2022-08-18T16:03:03+0900

https://www.zhongtaigraphite.com/products/graphite-block/

Solid graphite block, as the name suggests, refers to block graphite. It is a kind of artificial graphite, which is made of coke products by artificial heating and other processes. Because of its structure, carbon graphite block has the following properties: high-temperature resistance, conductivity, thermal conductivity, lubricity, chemical stability, plasticity and thermal shock resistance.

Graphite Blocks for Sale
High Purity Graphite Block
High purity graphite block, also known as molded graphite, means that the carbon content of graphite is>99.99%, which has excellent characteristics such as good conductivity, thermal conductivity, oxidation resistance, low resistance coefficient, high purity, self-lubricating, thermal shock resistance, isotropy, and easy processing. It is widely used in aerospace, solar photovoltaic and semiconductor, continuous casting, cemented carbide and electronic mold sintering, EDM, glass, machinery, energy, and other industries.

Electrolytic Graphite Block
The anode of electrolytic graphite electrolysis often oxidizes the anions in the solution into simple substances or other high valence states.

Graphite Block For Vacuum Furnace
The application of Graphite Block For Vacuum Furnace in vacuum furnaces greatly simplifies the design and manufacture of vacuum furnaces, reduces the consumption of metals such as tungsten, molybdenum, tantalum, and stainless steel, reduces the cost, improves some properties of vacuum furnace and expands the application range of vacuum furnace.

Application of large graphite block in metallurgy and casting production

Graphite block is an industrial graphite product obtained by deep processing of graphite electrodes! Here is a brief introduction to the application and precautions of graphite block in powder metallurgy and metal casting:

The use of graphite block in powder metallurgy is mainly in the sintering link. The raw materials are put on the graphite block and melted different metals through high temperatures in the sintering furnace or vacuum furnace. Due to the high-temperature resistance and oxidation resistance of graphite block itself, it can meet the requirements of the powder metallurgy industry. Graphite welding block can be used repeatedly, which can save economic costs for customers!

Let's talk about the use of carbon graphite blocks in the foundry industry. The metal can be heated in a graphite crucible to 1500 ℃ and become liquid. At this time, the graphite mold casting method can be used to cast the required industrial products. Graphite mold casting is simply that graphite mold casting is similar to metal mold casting. It has good thermal conductivity and thermochemical stability. Casting tin bronze and aluminum iron bronze with graphite mold can overcome the casting defects such as shrinkage, porosity, and pinhole, and improve the mechanical properties.
How to distinguish the quality of graphite block

In fact, many manufacturers have used graphite blocks for more than ten years and have not identified how to determine the quality of them. Some say it is particles and some say it is a formula. In fact, this is only a summary of products. There is only one key point to distinguish the quality of carbon graphite blocks, that is, density. The importance of density in the application of graphite block can be described from these aspects.

1. In the electroplating and electrolysis industries, many manufacturers only pay attention to the conductivity and price of graphite blocks, but sometimes ignore the important density, because if the density of the graphite block is small, pores are easy to appear on the surface, and penetration is easy to appear in the electrolyte, resulting in the oxidation and falling off of graphite sheets plates, resulting in greatly shortening service life.

2.In the anti-friction industry, graphite welding blocks are mainly used in the form of backing plates to play a lubricating role. Here, the density of graphite blocks is greatly shown. The physical structure of graphite blocks with small densities is not compact, which is easy to fall off in use and the surface consumption is too fast.

Preparation method of graphite block
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The preparation of graphite blocks is very important. The weight of each product must be just right in order to produce a high-quality graphite welding block.

1. 70-90 phr anthracite, 5-10 phr catalyst element or its compound, and 10-20 phr silica were selected;

2. Smash and mix the components evenly, put them into the press, raise the temperature and pressure;

3. Raise the temperature to 400 ℃ ~ 1000 ℃ and the pressure to 10 ~ 50kPa;

3.Heat preservation for 10 ~ 40 minutes; The method directly uses coal to manufacture artificial graphite, so as to manufacture carbon graphite block. The process is simple and easy to implement, the energy-saving benefit is prominent, the proportion of the graphite and carbon products is slightly lighter, the particle size is 0.05 ~ 1mm, the performance is not inferior, and the lubrication performance is good.

As one of graphite blocks suppliers and graphite block manufacturers, we have types of related products for sale, if you have needs, please contact us.

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Graphite Anode Plate(2022年08月19日)

zhongtaigraphite — 2022-08-18T16:00:05+0900

https://www.zhongtaigraphite.com/products/graphite-anode-plate.html

Graphite anode plate has the advantages of high-temperature resistance, good conductivity, easy machining, good chemical stability, acid and alkali corrosion resistance, and low ash content. It can be used for an electrolyzing aqueous solution to produce chlorine and caustic sodium, and electrolyzing salt solution to produce alkali; Graphite anode plate can also be used for electroplating various metals and non-metallic carriers. For example, a graphite anode plate can be used as a conductive anode for an electrolytic salt solution to produce caustic soda. It can also be used for sewage treatment in chemical, electronic, and textile industries.

What factors will affect the service life of graphite anode plate

The development of the graphite anode plate industry has entered a new stage. The main raw material of graphite anode plate is crystalline natural graphite, so it maintains the original physical and chemical properties of natural graphite.

Performance

The oxidation resistance and high-temperature resistance of graphite sheets plates also directly determine their service life.

Density

The higher the density, the longer the service life of the carbon graphite plate. For example, if the density is 1.7, it will more than double the service life of 1.5.

Specifications

The general thickness is between 2-3cm, but if the graphite anode plate is too thin, the control of material layout can determine its durability.

Application of Graphite Anode Plate

In the electrolytic industry, high purity graphite anode plate has been used as anode for more than 100 years. Graphite anode plate has the advantages of high-temperature resistance, good conductivity, easy machining, good chemical stability, acid, and alkali corrosion resistance, and low ash content. It is used in many fields: an electrolyzing aqueous solution to produce chlorine and sodium, and electrolyzing salt solution to produce alkali; a conductive anode for producing caustic soda by electrolysis of salt solution; a conductive anode in the electroplating industry.

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GRAPHITE MOLD MANUFACTURING(2022年08月18日)

zhongtaigraphite — 2022-08-18T15:58:18+0900

https://www.zhongtaigraphite.com/products/

Graphite is corrosion resistant and is not easy to react with acid, alkali, and other chemicals.

Graphite raw material is commonly used in processing graphite plate, graphite anode plate, high purity graphite plate, and other graphite products. It can be used in the production of refractory materials, conductive materials, wear-resistant materials, lubricants, high-temperature resistant sealing materials, corrosion-resistant materials, heat insulation materials, adsorption materials.

Friction materials and anti-radiation materials are widely used in metallurgy, petrochemical, machinery industry, nuclear industry, national defense, and other industries.

Types of Graphite Products

Graphite material is mainly composed of polycrystalline graphite, which belongs to inorganic non-metallic materials, but it is called semi-metallic because of its good thermal and electrical conductivity. It has higher thermal and electrical conductivity than some metals, a lower thermal expansion coefficient than metals, a high melting point, and chemical stability, which makes it have important value in engineering applications.

It is a kind of non-gold composite material made of several kinds of raw materials by hot pressing. The main raw material is high carbon natural graphite, and the finished product is granular，Its main purpose is high temperature and lubrication.

It is made of petroleum coke and medium temperature coal tar pitch after crushing, screening, proportioning, molding, cooling roasting, impregnation, and graphitization. According to the product type, it can be divided into extrusion, molding, and isostatic pressing. According to the particle size, it can be divided into a fine particle, medium-coarse particle, and coarse particle.

Graphite plate has good electrical conductivity, high-temperature resistance, acid resistance, alkali corrosion resistance, and easy processing, etc. it is widely used in metallurgy, chemical industry, electrochemical industry, and other industries.

Graphite ring is mainly used in mechanical rotating parts of the seal, with high temperature resistance, corrosion resistance and wear resistance.

The pump core in the air pump, air pump and high pressure air pump will be dumped out of the blade by the operation of graphite rotor, and then the gas will be ejected. Micro air pump, micro vacuum pump, gas charging motor, motor, rubber, air pump, micro solenoid valve, sucker vacuum pump, electric sucker pump, inflation motor.

As a necessary cutting consumable before welding in the process of carbon arc gouging, graphite is made by carbon and graphite plus proper adhesive, formed by extrusion, and plated with copper after the baking and rotating section at 2200 ℃, which is high temperature resistant, good conductivity and not easy to break. It is suitable for cutting the metal into a shape that meets the requirements.

Graphite electrode, mainly made from petroleum coke and needle coke, is made by calcination, batching, kneading, pressing, roasting, graphitization and machining. It is a conductor that releases electric energy in the form of electric arc to heat and melt the furnace material. According to its quality index, it can be divided into ordinary power, high power and ultra-high power.

Graphite crucible is a kind of high-temperature vessel that melts and holds nonferrous metals and new materials, and can also be used for refining and purifying non-ferrous metals and new materials.

Graphite mold for high-temperature sintering is a carrier, which can put the raw materials and parts we need to locate or set up together in the graphite mold.

Graphite Properties
01 - Super high-temperature resistance

The melting point of graphite is 3850 ±. The boiling point is 4250 ℃, and the weight loss is very small and the coefficient of thermal expansion is also very small even if it is burned by UHT arc. The strength of graphite increases with the increase of temperature, and the strength of graphite increases twice at 2000 ℃.

02 - Good thermal conductivity and thermal shock resistance.

Graphite can withstand the drastic change of temperature without damage when used at room temperature. When the temperature changes, the volume of graphite changes little and no crack will occur.

03 - Chemical stability and corrosion resistance.

At room temperature, graphite is not subject to any strong acid, strong alkali, and organic solvent.

04 - Environmentally friendly and healthy

Free of radioactive pollution and high-temperature resistance.

05 - Graphite products have good adsorption.

Now the graphite raw material price is affordable, if you have needs, please contact us.

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