Graphite is a carbonaceous element mineral crystals, crystal lattice of its hexagonal layered structure, shown in Figure 1 - 1. The distance between each grid is 3.40, and the spacing of carbon atoms in the same network layer is 1 42A. Is the six party system, layered with complete cleavage. The cleavage surface is mainly composed by molecular bonding, weak on the molecular attraction, so the natural floatability is very good.

　　Graphite soft, dark gray, greasy feeling, can pollute paper. Hardness of 1 to 2, along the vertical direction along with the increase of impurities can be increased from 3 to 5. Specific gravity is 1.9 to 2.3. Under the condition of isolated oxygen, its melting point is above 3000, and it is one of the most heat resistant minerals.

　　Pure graphite in nature is not, which often contains A1203, Fe0, Si02, CaO, P2O5, Cu0 and other impurities. These impurities often appear in the form of quartz, pyrite, carbonate and other minerals. In addition, there are water, asphalt, CO2, H2, N2, CH4 and other gas parts. Therefore, the analysis of graphite, in addition to the determination of fixed carbon content, it must also determine the content of volatile and ash content.

       Graphite crucible can be widely applicable to smelting of gold and silver, copper, iron, aluminum, zinc, tin, and adapt to the coke, oil, natural gas, electric and other smelting various heating methods. Advanced crucible molding technology of static crucible forming method, this technique make the crucible: volume density, high temperature resistant, heat, acid alkali corrosion resistance, high temperature strength, oxidation resistance of high, save fuel at the same time and reduce the labor intensity of the workers. Products have been widely used in power, metallurgy, oil, fire, chemical, two network transformation and other basic industries and modern engineering facilities.

　　The below is the characteristics of graphite crucible:

　　1. The chemical graphite crucible is used for the natural graphite crucible, which has good thermal conductivity and saves fuel.;

　　2. The operation of the aluminum crucible is convenient, has a good mobility, the environment is very small;

　　3. Aluminum graphite crucible should use natural graphite, good retention of the characteristics of graphite, high temperature, alumina graphite crucible with good heat resistance, can be high temperature 1800 degrees;

　　4. Aluminum graphite crucible surface contains special coating, good corrosion resistance, oxidation resistance;

　　5. The aluminum material of the aluminum graphite crucible pollution is rarely, almost zero.

　　High pure graphite is widely used in casting, metallurgy, mold and other industries, high precision CNC machining equipment for production of horizontal continuous casting with high purity, high strength, high density graphite crystallizer and the electronics industry with a graphite mold; metallurgical industry graphite mold and other various shapes, various uses ink stone processing of finished parts to realize, the needs of machining precision and roughness of graphite.

　　High purity graphite material has outstanding features.

　　1. Thermal stability: the reliability of the product quality is guaranteed by the special design of the conditions for the rapid quenching of the graphite crucible..

　　2. Erosion resistance: matrix design fine uniform delay crucible erosion degree. Impact resistance: graphite crucible can withstand the high thermal shock intensity, so any process can be assured to.

　　3. acid resistance: the addition of special materials significantly improve the quality of the crucible, in the acid resistance of the outstanding indicators, and greatly extended the life of the graphite crucible.

　　4. high thermal conductivity: high content of fixed carbon ensure good thermal conductivity, shorten dissolution time, and significantly reduce the energy consumption.

　　5. metal pollution control: the strict control of the material composition, guarantee the dissolution of the graphite crucible no pollution to the metal.

　　6. the quality stability: the production technology and the quality guarantee system of the high pressure forming process guarantee the stability of the quality.

Graphite electrodes material are characterized by superior compact structure, good electrical and thermal conductivity, high resistance to oxidation and corrosion in high temperature. The regular power graphite electrodes graphite electrodes for heavy industrial arc furnaces, steel mills, foundries, and other applications.

　　There are a lot of selection criteria for graphite electrode material, but the main selection criteria are four.

　　1.Average particle diameter of graphite electrode materials

　　Average particle diameter of graphite electrode materials Direct influence on the discharge of materials。The smaller the average particle size of the graphite electrode material, the more uniform the discharge of the material, the more stable the discharge, the better the quality of the surface.。For the surface machining accuracy of the casting die casting die, recommend the use of coarse particles of material， For the higher accuracy of the processing of the electronic mold, recommended the use of smaller particles of the material, in order to ensure the accuracy of the processing mold, surface finish。The smaller the average particle size, the smaller the loss of the material in the process.。

　　2.Flexural strength of graphite electrode materials

　　The flexural strength of the graphite electrode material is the direct embodiment of the material strength. Show close degree of internal structure

　　3.Shore hardness of graphite electrode materials

　　In the subconscious of the general people, graphite is considered to be a kind of strength of the material, but in the actual measurement data and application show that the strength of graphite, higher than the metal material。

　　4.Intrinsic resistivity of graphite electrode materials

　　If the average particle size of the graphite electrode material is the same, the resistivity of the electrode material is slower than the resistivity of the material. For the same average particle size of the electrode material, the resistivity of the material, its strength and hardness will be corresponding to the resistivity of the graphite electrode material. Discharge speed, loss will be different, so according to the actual application of the need to choose the appropriate material is very important.

　　These four kinds of data represent the main discharge performance of the material, and directly determine the performance of the material.

Graphite products and process are widely used in many different fields, such as machinery, electron, semiconductor, mono-crystal silicon metallurgy, oil, chemistry,conductive material etc.we constantly maintain our research and development in the carbon and graphite technology.We interested in supplying those materials for you.As a leading Chinese graphite manufacturer and supplier, we specialize in providing high quality graphite material, carbon carbon composites and graphite parts.The below are different types of graphite applications.

　　1.As refractory materials including refractory brick, crucible curse, continuous casting powder, casting mold, mold detergent and high temperature resistant material.

　　Magnesia carbon brick, magnesia carbon refractories is in the mid 1960s, by the United States developed; in the world within the scope of magnesia carbon brick has been widely used in steelmaking, and has become a graphite a traditional uses. Alumina carbon brick, aluminum carbon refractory material mainly used in continuous casting, steel billet from a transmission pipeline protective cover, water nozzle and oil pipe bomb.

　　Forming and refractory made of graphite crucible and related products, such as crucible, retort, plug head and nozzle, with high fire resistance, low thermal expansion, metal smelting process by metal infiltration and erosion is also stable, high temperature and good thermal shock resistance and excellent thermal conductivity, so increasing graphite disaster and related products is widely used in process for the direct melt metal.

　　2.Steelmaking

　　Graphite and other impurities can be used as the material for the steel industry carburetant. Using carburizing carbonaceous material, is very wide, including artificial graphite, petroleum coke, metallurgical coke and natural graphite. In the world of one of the main uses of steel carbon graphite or amorphous graphite.

　　3.As conductive material

　　Graphite in the electrical industry are widely used as electrode, brush, carbon, carbon nanotubes, mercury rectifier anode, graphite gaskets, telephone parts, TV picture tube coating and so on. Among them, the graphite electrode is widely used in the smelting of various alloy steels, iron alloys, graphite electrodes. The graphite used in the electrical industry is very high in granularity and grade..

　　4.For wear and lubrication materials

　　Graphite often lubricant in mechanical industry. Lubricating oil often cannot in high speed, high temperature and high pressure conditions using, and abrasive resistant graphite materials can in a 2000 DEG C temperature of 200 DEG C and at high sliding speed (100 m / s) without the lubricating oil. Many equipment for conveying corrosive medium, the widespread adoption of graphite material piston ring, sealing ring and the bearing, they are running, do not need to add lubricating oil, graphite and metal processing (Roberts, trombone) good lubricant.

　　5.As corrosion-resistant materials

　　Graphite has good chemical stability.. After special processing of graphite, corrosion resistance, good thermal conductivity, low permeability characteristics, widely used in the manufacturing of heat exchanger, reaction tank, condenser, burning tower, absorption tower, cooler, heater, filters, pumps, etc. equipment. The equipment is used in petrochemical industry, wet metallurgy, acid alkali production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.

　　6. For the atomic energy industry and defense industry

　　Graphite has good neutron reduction performance, the earliest as the reducer for atomic reactors, uranium graphite reactor is currently a more application of an atomic reactor. As the power of the atomic energy reactor in the reduction material should have a high melting point, stability, corrosion resistance, graphite can meet the above requirements.

　　7. Anti - scale anti - rust material.

　　Graphite can prevent boiler fouling. The test shows that adding a certain amount of graphite powder in the water can prevent the fouling in the boiler surface.. In addition graphite coated metal chimney, roof, bridge, pipeline can be anti-corrosion and rust.

　　8. Other new uses

　　1) Flexible graphite products. Flexible graphite, also known as expanded graphite, is a new graphite product developed in the 70's.. 1971 United States successfully studied the flexible graphite seal material, solved the problem of leakage of atomic energy valve, then Germany, Japan, law also began to develop and produce. This product has special flexibility and elasticity except for the characteristic of natural graphite.. Therefore, it is an ideal sealing material, widely used in petrochemical industry, atomic energy and other industrial fields, the international market demand increased year by year.

　　2) Making half metal friction material. Since the 70 s, the clutch and auto lining have been widely used in half metallic friction materials. Semi metallic friction material is graphite and metal powder, steel fiber, clay powder made of synthetic resin bonding. These automatic liners are mainly used for high-speed equipment, such as airplanes, trucks and brake devices and clutch discs for off-road vehicles

Graphite is an allotrope of carbon, each carbon atom in the peripheral connecting also three carbon atoms (arrangement is multiple hexagon honeycomb) by covalent bonds with the covalent molecule is formed. Since each carbon atom emits an electron, the electrons can move freely, so that the graphite belongs to the conductor.. Graphite is one of the most soft minerals, and its use involves making pencil and lubricant.. Carbon is a non-metallic element, Latin Carbonium.

　　Graphite and its products has high strength, acid resistance, corrosion resistance and high temperature resistant, 30 DEG C and resistance to low temperature - 204 DEG C and other excellent properties, is widely application in metallurgy, chemical industry, petroleum chemical industry, high energy physics, aerospace, electronics and other aspects. The specific properties of graphite are roughly the following:

　　1. super high temperature resistance

　　Graphite melting point of 3850 + 50 DEG C, the boiling point of 42.5 DEG C, even the ultra high temperature arc ignition, weight loss is very small, coefficient of thermal expansion is also very small. The graphite strength increases with the temperature, and the graphite intensity is doubled at 2000..

　　2. graphite products have good thermal conductivity, thermal shock resistance. Graphite can withstand the temperature changes without failure, when the graphite is used in normal temperature, the volume of the graphite will change little, and the graphite will not produce cracks..

　　3. graphite products have chemical stability and corrosion resistance. Graphite has good chemical stability at room temperature, without any erosion of acid, alkali and organic solvent.

　　4. graphite products environmental health, no radioactive pollution, high temperature resistance. Carbon in 2000-3300 degrees high temperature environment after at least a dozen days and nights of graphitizing process to become a graphite. Therefore, graphite in the toxic and harmful substances have been released and exhausted, at least 2000 degrees or less is very stable.

　　5. graphite products have good adsorption. Carbon has good adsorption, so carbon is often used as adsorption material for the adsorption of moisture, odor, toxic substances, etc..

　　If you need graphite or carbon products , We interested in supplying those materials for you.As a leading Chinese graphite manufacturer and supplier, we specialize in providing high quality graphite material, carbon carbon composites and graphite parts.To buy graphite and carbon products please contact us and ask our sales manager for a quote.

　　Graphite mold is mostly carbon, part of the air so that the graphite prone to oxidation at high temperatures, Typically graphite oxide at about 500 ℃ start, and with the graphite mold temperature increases the oxidation rate of oxidation of geometric growth intensified.Graphite mold is mainly graphite machining, and the periphery of each of the carbon atoms linked to three other carbon atoms covalently bonded to constitute a covalent molecule.

　　Graphite mold has been used following areas:

　　1. artificial graphite die for hot pressing sintering of cemented carbide has the following characteristics: if pressed when the temperature increased to 1350-1450 degrees, the pressure can be reduced to the desired unit 67- 100 kg / sq cm (that is, cold pressure of 1/10) can;

　　2. graphite mold has been successfully applied on centrifugal casting . In order to prevent the burning of artificial graphite mold, oxidation can take certain measures .

　　3. molten metal directly continuous (or semi-continuous) bar or tube manufacturing and other advanced production methods. Artificial graphite as a non-ferrous metal continuous casting or semi-continuous casting mold is considered the most suitable material.This not only greatly improve the yield, reduce scrap loss, and product quality has greatly improved.

　　4. artificial graphite material has been used successfully on non-ferrous metals pressure casting . pressure die casting production of zinc alloy and copper alloy castings artificial graphite materials have been used in automotive parts and so on.

　　5. Since the graphite material having chemical stability, less susceptible to the infiltration of molten glass, does not change the composition of the glass, good thermal shock resistance graphite material, size and other characteristics with temperature change is small, manufacture become an indispensable mold material, can be used to manufacture the glass tube, pipe, and so on.

　　6. the use of artificial graphite material minimal thermal deformation characteristics of transistors can be manufactured sintering mold and brackets, has been widely used,. the graphite mold is also used in cast iron mold, the durability of the mold with a variety of non-ferrous metals. Diamond Mold requires high material hardness and good oxidation resistance, high precision machining, using high-quality raw materials, graphite molds greatly extended life and improved oxidation resistance. Hot sintered diamond tools graphite mold, charged with the dual role of the heating element and the mold support in the diamond tool manufacturing process, graphite mold quality will directly affect the dimensional accuracy and appearance of the shape of diamond tools and so on. Under working conditions, require both heat generating element and forming a graphite mold having conductivity, high electrical resistivity, adequate mechanical strength, but also it has good oxidation resistance and long life, in order to ensure the diamond dimensional accuracy and high performance tools.

　　Graphite is used in a number of forms in refractories due to its ability to withstand intense temperatures. Alumina-graphite is used to construct nozzles and troughs. Graphite based bricks are used to line steel convertors, blast furnaces and electric arc furnaces.

　　Graphite is used to construct the anodes of all major batteries such as batteries used around the house in remote controls and battery powered toys. Graphite is particularly important in the construction of electric car batteries.

　　Natural graphite and synthetic graphite are both used as a carbon raiser in molten steel. This increases the carbon content in the steel.Graphite is used in the brake linings of large heavy vehicles.Fine flake graphite is used in a certain type of water-based paint that is used to prevent hot metal from sticking to molds.

　　Graphite is also used to produce lubricants to use at very high or very low temperatures. Forging die lubricants, anti-seize agents, gear lubricants are all made from graphite.Graphite is used as the marking substance inside pencils. It is normally mixed with clay to give it softer characteristics. It is also used in raw form as an artistic medium in sticks and flakes.It is also used in some electric motor brushes.

　　Expanded graphite is used to make graphite foil which is used to make bipolar plates in fuel cells and heat sinks for laptop computers.Expanded graphite is often used as a surface material for molten metal ladles and steel ingots to reduce heat loss.It is also used as fire stops around the edge of fire doors and as protective sheets around pipes to prevent fire damage.Specialized synthetic graphite is also used as a matrix and neutron moderator in nuclear reactors.

　　Synthetic graphite is used to create the electrodes that melt scrap iron and steel in electric arc furnaces due to graphite’s ability to conduct electricity.Graphite fiber is also used to reinforce plastics such as those used in fishing rods, golf clubs, bicycle frames and pool cues and heat-resistant components such as reinforced carbon-carbon.Graphite has also been used to create radar absorbent materials and smokeless powder.

　　Graphite is one of six allotropes of carbon elements,it’s layered crystal structure.As the special crystal structure,graphite shows the unique physical and chemical properties,such like:silver gray,lubricity,electrical conductivity,corrosion resistance,oxidative stability etc.Graphite divided into two categories,natural graphite and synthetic/artificial graphite.

　　The natural graphite come from the graphite mineral,and there are two types of it, Amorphous graphite and crystal graphite(flake graphite).too much impurities in the graphite ore after mining,so it need to be beneficiation before using.the mainly use of natural graphite is produce refractory material,carbon brush,flexible graphite,lubricant,etc.it also be used for carburetant.

　　Among the carbon industry,the largest production of the graphite products is variety of synthetic/artificial graphite.it’s usually manufactured by petroleum coke or pitch coke,and finished after charge mixture, kneading,molding,baking, graphitization and machining,the production cycle need dozens of days.

　　Graphite have a lot of types.There are so many kinds of the artificial graphite: Single crystal graphite, multi crystal graphite, pyrolytic graphite and Highly oriented pyrolytic graphite,carbon fiber and so on.Most of the graphite products belong to the multi crystal graphite.

　　Graphite electrode is the mainly product of all the graphite products. It’s a high temperature resistance,corrosion resistance and electrical conductivity material.the artificial graphite is also widely used in other industry,such like the carbon brush used in the electrical machine,casting mould,EDM dies , wear parts and electrolytic cell in the chemical industry.High purity and high strength graphite material is also used in the nuclear industry and as the parts of rocket.

　　If you need graphite or carbon products , We interested in supplying those materials for you.As a leading Chinese graphite manufacturer and supplier, we specialize in providing high quality graphite material, carbon carbon composites and graphite parts.To buy graphite and carbon products please contact us and ask our sales manager for a quote.

The performance of the graphite crucible with excellent wear resistance, thermal conductivity and electrical conductivity, and so on. Use the graphite crucible, not only can improve the service life, reduce the current consumption, but also can save energy and reduce the system load. At the same time, the graphite crucible for energy saving, environmental protection also play a very important role. Based on the above advantages, graphite crucible factory in tianjin is also our very reliable manufacturer.

Graphite crucible is made from natural high quality graphite refined but become, have good thermal conductivity and high temperature resistance, high temperature environment used in the thermal expansion is not only the number is small, but also has thermal shock resistance strain performance, acid and alkali resistant with excellent chemical stability. Multiple variety and complete specifications, used in metallurgy, machinery, chemical industry, casting and other industrial sectors, the steel smelting and smelting non-ferrous metal and alloy also has been the most widely used.

When we use graphite crucible is also necessary to pay attention to matters, graphite crucible need to guard against damp, care must be taken in a dry place or the gallows, when handling light to take light put, it is forbidden to shock. Before use must be in the hot oven drying equipment or stove, let the temperature gradually rises to 500 ℃, avoid the furnace cover wear and tear of the following should be on the front plane of crucible crucible. Graphite crucible when feeding should be according to the crucible solvent quantity, not charging too much, too tight to avoid expansion of crucible. Tools and crucible clip out to conform to the crucible shapes, clip the department to avoid local stress damage the crucible. Both inside and outside the removal of crucible wall gently slag and stick cokes to avoid damage to the crucible. Should keep a proper distance between the furnace wall crucible, crucible should be placed on the center of the furnace. In the use of excessive accelerant, additives will reduce the service life of crucible. Finally, in use process by rotating the crucible every week, can prolong the service life of crucible.