The graphite which are in different properties should use different processing methods, we will give you a brief introduction:

　　Purification processing of the graphite products : the requirements of graphite products in modern industrial focus on the development of two aspects: the first, the requirements of large crystal scales to achieve high purity, and the second is required to achieve ultra fine graphite particles (such as less than 1 m or 0.5 m). Our company has established the production lines of graphite purification and fine powder processing , the purification method is mainly chemical purification. The most mature technology of graphite chemical purification is melting the caustic alkali and graphite at 700 DEG C, and then washing them to neutral, and then adding hydrochloric acid to treat and wash it so that the carbon content of the graphite can reaches 98% ~ 99%. There are also some manufacturers produce the high purity graphite with the hydrofluoric acid treatment.

　　Processing method for natural crystalline graphite: the natural crystalline graphite has good native floatability. in China , we are basically using the flotation method for processing. the method of multi - stage grinding and multi - selection is adopted to select large scale graphite as soon as possible because of the size of graphite flake is one of the most important quality indicators, The common collector for flotation is kerosene, diesel oil, etc., and the foaming agent is two oil, No. four oil, and the adjusting agent is lime and sodium carbonate.

　　Aphanitic graphite processing methods: the aphanitic graphite crystal is extremely small, so it’s also called microcrystalline graphite, the graphite particles are often embedded in clay, the separation is very difficult. Many graphite mines will crush and process the ore directly and then sell the graphite powder products because of the high grade ore (carbon containing is 60% ~ 80%). At present, some units are still in the process research of microcrystalline graphite flotation (such as oil agglomeration flotation, etc.).

　　The rigid composite graphite felt is based on PAN based carbon felt as the base material after above 2200 degrees high temperature graphitization treatment, and then treated through carbonization and graphitization by special adhesive composite.

　　The rigid composite graphite felt has certain rigidity, self support, the proportion of small, low thermal conductivity, no fiber shedding and the using temperature can reach 3200 DEG C. It’s suitable for various types of furnace types such as high pressure gas quenching furnace, pressure sintering furnace, polycrystalline casting furnace, single crystal growth furnace (sapphire), etc. the utility model can provide various shapes such as flat plate, disc and cylinder, etc. It has the advantages of long service life, it’s convenient to install and dismantle.

　　The biggest feature of our rigid composite graphite felt compared with the similar products are: high treatment temperature, low impurities, high purity (<200ppm) it is especially suitable for high temperature furnace which has the high furnace atmosphere requirements; high temperature heat insulation material provides excellent thermal properties and high mechanical strength, it can be customized according to the drawings; maximum standard board on the market, the utilization rate is high (1500*1200* thickness according to customer requirements, the error is + 2); coverage /coating (①Attaching the graphite sheet on the surface or putting the graphite sheet between the material, ②SiC coating on the surface , ③pasting the carbon cloth on the surface); excellent thermal insulation property; the purity is less than 200ppm after 2200 DEG C high temperature; it’s applicable to all kinds of vacuum furnace, induction furnace, polycrystalline ingot furnace; it has high corrosion resistance and it’s easy to process.

　　Our products involved in the field of aerospace, vacuum metallurgy, solar new energy, new chemical materials, we are the manufacturer which is specializing in the production of rigid composite graphite felt and high temperature and high purity graphite felt materials for domestic in China. The main products are carbon felt, graphite felt,rigid composite graphite felt and the auxiliary products such as carbon cloth, carbon rope and so on ,our products are widely used in all kinds of high temperature vacuum furnace equipments such as single crystal growth furnace, polycrystalline casting furnace, polycrystalline furnace, vacuum sintering furnace, hot pressing furnace, heat balance furnace and electric magnetic induction furnace ,non-oxidizing atmosphere high temperature equipment and high purity silicon hydrogenation furnace etc..

　　Graphite crucible is widely used in the experiment and the melting of metals and graphite crucible materials with special graphite materials of high purity and high strength and high density; after high precision CNC machining equipment, can produce a graphite crucible, graphite crucible, graphite casting, oil groove tube, pull piece, pull rod mold special graphite graphite products. The material selected for the precious metal smelting crucible, graphite crucible can make products than ordinary products and durable degree more than 2 times, longer service life, more can withstand high temperatures above 2000 degrees Celsius! The graphite crucible is characterized by good thermal stability of

　　1 graphite crucible, graphite crucible for rapid heating and cooling conditions of use, especially the formulation

　　2. graphite crucible, good corrosion resistance, impact resistance, the reliability

　　3. graphite crucible to ensure product quality and good resistance to acid and alkali.

　　4. graphite crucible is good Heat transfer performance: can greatly shorten the smelting time, saving energy.

　　5. graphite crucible ash is less than 300pp, to ensure that precious metals in the smelting is not contaminated

　　Carbon graphite ring with excellent temperature resistance, self lubrication, low friction coefficient, wear resistance, corrosion resistance and good thermal conductivity, thermal expansion coefficient, the alternating high and low temperature performance and adaptability of material physical and mechanical properties, the mechanical seal should be used as the key components in the field of existing several hundred years of history.

　　There are many kinds of carbon graphite ring, which are widely used in various types of compressors, turbines, pumps and other mechanical equipment. Carbon graphite split ring according to use can be divided into: piston ring and guide ring, packing ring, sealing ring and labyrinth seal, hydraulic turbine, turbine compressor carbon graphite mechanical seal.

　　According to the specific use of the customer's environment and temperature, our company will further enhance the processing of graphite rings to improve the oxidation resistance, wear resistance, corrosion resistance and other characteristics.

　　Application: paper, textile, printing and dyeing, chemical fiber, rubber, plastics, chemical, pharmaceutical, food, tobacco, packaging, printing, machinery, electrical appliances, building materials, metallurgy, steel, oil refining, military and other industries.

　　Graphite packing is mainly composed of various fiber, metal wire reinforced (steel wire, nickel wire, copper wire, carbon fiber, preoxidized fiber, glass yarn) and reinforced graphite lines as raw materials Seiko weaving and. Suitable for high temperature and high pressure dynamic sealing. In addition to a few strong oxidizing agents, it can be used to seal the hot water, steam, heat transfer fluid, ammonia, hydrocarbons, low temperature liquids and other media, mainly used for high temperature and high pressure sealing, corrosion medium valve, pump, reactor. It is also a unique universal sealing packing.

　　Application industry

　　Chemical, petroleum, pharmaceutical, food and sugar, pulp, paper and power industries.

　　Application medium

　　The chemical industry can tolerate boric acid, dichloromethane, acetone, acetic acid and other media. Graphite plate to remove a small number of strong oxidizing medium outside the seal of hot water, high temperature, high pressure steam, heat transfer medium, hydrogen, ammonia, organic solvents, hydrocarbons, low temperature liquids and other media

　　1 compact crystalline graphite packing

　　Compact crystalline graphite. The crystals of this kind of graphite are visible to the naked eye. The particle diameter is larger than 0.1 mm, the specific surface area is concentrated in 0.1-1m2/g, the crystal arrangement is disordered, and the structure is compact and massive. The graphite is characterized by a very high grade, general carbon content is 60 ~ 65%, sometimes up to 80 ~ 98%, but its plasticity and unctuousness as fine flake graphite.

　　2 graphite packing, graphite packing

　　Graphite packing crystal scaly; this is under high pressure metamorphism, large scale and fine scale division. This kind of graphite ore is characterized by low grade, generally 2 to 3%, or between 10 ~ 25%. Is one of the best ore floatability in nature, which can be more difficult after high grade graphite concentrate. This kind of graphite is better than other types of graphite in its floatability, lubricity and plasticity.

　　3 aphanitic graphite, aphanitic graphite packing

　　Hidden quality graphite also called amorphous graphite or amorphous graphite, the graphite crystal diameter is generally less than 1 microns, the specific surface area of the range of concentration in 1-5m2/g, is a collection of microcrystalline graphite, only under the electron microscope to see the crystal. This kind of graphite is characterized by the surface of the soil, lack of luster, lubrication is poor. High grade. General 60 ~ 80%. A few up to more than 90%. Poor ore.

　　Graphite is widely used in industry and is used in almost every industry. Industrial use of synthetic graphite, that is, special graphite. According to the way they can be divided into the following.

　　(1) static pressure graphite. Three high graphite is a lot of people called, but not high is isostatic pressing.

　　(2) molded graphite

　　(3) extruded graphite, mostly as electrode material.

　　According to the particle size of graphite, can also be divided into: details of the structure of graphite, graphite, and graphite.

　　Main use editor

　　Asbestos packing for weak acid and alkali, ammonia, water, oil medium, valves, as static sealing anticorrosion and sealing effect is the best. Fiber packing a good thermal conductivity, acid and alkali resistance, suitable for all kinds of solvents, gasoline, water, liquid nitrogen pump, valve, sealing the reactor (another good thermal conductivity, acid and alkali resistance, high temperature resistance, suitable for high-speed operation under the condition of dynamic and static seal). PTFE packing is YISHION PTFE dispersion resins as raw materials, first made of raw film, after twisting, braided packing. Theptfewithout otheradditives, can be widely used in food, pharmaceutical, paperchemical fiberwithhigh cleanlinessrequirements, and has a strong corrosive medium, the valve is not suitable for use in water pump.

　　The nature of high speed, high modulus aramid packing has excellent the (called artificial wire) its strength is three times the weight of the wire, five times lighter than the metal wire. So, compared with other types of packing, it can resist granular crystalline medium and higher temperatures can be used alone or in combination with other packing, suitable for solid particles with a wear medium, recommended for superheated steam, solvents, liquefied gas, Syrupand othergrindingfluid. Is a good substitute for asbestos in the pump system.

　　The high water base plate is made of high quality ramie fiber, which is coated with graphite inside and outside. The outstanding advantage is that the coefficient of friction is very low, the shaft is not worn, corrosion resistance. The utility model can be used in the ship industry, the cold water treatment, the sea water and the cold oil, the low-pressure valve, the rotary device, the reciprocating pump hydraulic press, the ship propeller, etc.. Recommended for use in general dynamic seals, low pressure valves, rotating equipment, and reciprocating pumps. Temperature are less than 140 pH value: 2-12 line speed: 10m/s 15bar mixer blower: 15bar valve: 20bar is suitable for all kinds of water, sea water, salt water, oil, grease, weak acid, alkali medium, especially resistant to abrasive. (the packing according to the color to black and white).

　　Graphite packing is to solid phase carbonation reaction, carbon fiber in non carbon nitrogen almost entirely by overflow go get graphite fiber carbon content close to 100%. The release of nitrogen is the result of a further condensation reaction of the small six carbon network plane, and the solid-state graphitization condensation reaction. About 6% ~ 7% nitrogen was removed in the process of graphitization, which left a lot of pores and pores of the path, resulting in the porosity of Vp reached the peak in the graphitization process. It is about 2200 degrees, almost all nitrogen removal, the porosity value; 2200 DEG C, the porosity of Vp decreased sharply, density rose sharply, small aromatic ring condensation reaction is the main reaction in the process of graphite packing, to fiber element

　　The bearing is a sliding parts commonly used in machinery industry, material and metal, nonmetal, composite materials don't. Graphite bearing is with the performance requirements of mechanical equipment, carbon bearing based on metal bearings and the development of the graphite material as the main material. Graphite bearings are different from the characteristics of metal bearings, mainly in: self lubrication, high temperature resistance, corrosion resistance, light weight, etc..

　　Excellent properties of graphite bearings:

　　1, good self lubrication:

　　Because of its lamellar crystal structure, graphite has the property of self lubrication, and is suitable for the high temperature environment, the liquid and the unsuitable lubricant,

　　Especially in the absence of lubricant, the friction coefficient is lower than other materials.

　　2, good chemical corrosion resistance: not susceptible to acid, alkali and inorganic salts and other chemical erosion.

　　3, good heat resistance:

　　Mechanical strength and sliding characteristics will not cause any changes due to heat;

　　4, excellent heat shock resistance:

　　Compared with the low thermal expansion coefficient and good thermal conductivity of the metal material, even the sharp temperature change will not produce the crack.

　　5, benefit to light design:

　　Compared with the small volume density of the metal material, the utility model is beneficial to the light weight of the machine and reduces the sliding noise.

　　6, increase the use of products:

　　According to the specific needs of customers and the use of the environment for the deep processing of graphite bearings, increase the product in different environments, wear resistance, high temperature resistance, corrosion resistance.

　　Application: at present in food, beverage, textile, printing and dyeing, chemical and other industries in the conveyor bearings, centrifugal pump, submersible pump bearing, gear bearing bearings and automotive, aviation, agricultural machinery and other aspects of different degree has been applied, these parts such as grease lubricating agent will inevitably cause pollution and the graphite bearing lubrication is very strong, and can run on without the use of lubricating oil.

　　Compared with other materials of graphite anode plate has high temperature resistance, good electrical and thermal conductivity, easy machining, good chemical stability, acid and alkali corrosion resistance, low ash content; often used as a conductive anode used in the electrolytic solution, preparation of chlorine, caustic soda, salt alkali electrolytic solution preparation. Graphite anode plate can also be used as the conductive anode in electroplating industry. It is an ideal material for electroplating. It has the advantages of smooth, fine, wear resistance, corrosion resistance, high brightness and not easy to change color.

　　The graphite anode produced by our company with high-quality raw materials, low ash, high conductivity through computer control ingredients, using 2500 tons press pressed, with low ash, uniform particles, good conductivity and flexural strength etc..

　　Applications: electronics, metallurgy, chemical industry, iron and steel, environmental protection, sewage treatment and other industries

　　EDM with graphite electrode, also known as copper, in the mold manufacturing now has many areas, graphite cost advantage plays an important role in modern processing methods, including EDM graphite (isotropic isostatic graphite) in EDM is most widely used. My company after years of application in the field of EDM graphite operation, selection of several domestic and foreign high-quality carbon materials manufacturers as partners, to provide customers with excellent products of graphite electrode in EDM process in all kinds of bad, such as carbon, loss, surface is not up to the performance parameters of material and spark machine requirements and so on bad phenomenon and graphite itself has a direct connection, high quality graphite spark machine is not any brand of imported can achieve the desired effect, my company after years of research, according to the current market mainstream equipment to customers for graphite materials with the highest price, and a professional engineer to provide professional counseling can effectively reduce the cost of operating machine, help the mold manufacturing enterprises.

　　1: the increasing complexity of the mold geometry and the diversification of product applications lead to the increasing demand for the discharge accuracy of the EDM machine. Graphite electrode has the advantages of easy processing, high removal rate and low graphite loss. Therefore, the metal electrode is replaced by graphite electrode. In addition, some of the special shape of the electrode can not use copper production, but graphite are more easily formed, and the copper electrode is heavy, not suitable for processing large electrode, these factors have caused some qunji spark machine application of graphite electrode.

　　2: the graphite electrode is easier to process, and the processing speed is faster than the copper electrode. For example, the use of milling process graphite, its processing speed is faster than other metal processing 2 ~ 3 times and does not require additional manual processing, and the copper electrode is the need for hand grinding. Similarly, if the use of high-speed graphite processing center graphite electrode manufacturing electrode, the speed will be faster, more efficient, will not produce dust problems. In these processes, the choice of the right tools and graphite can reduce the wear and wear of copper and copper. If the graphite electrode and the copper electrode graphite electrode milling time is compared, the graphite is 67% faster than the copper electrode, in general, the processing of the graphite electrode is faster than that of the copper electrode by the use of the copper electrode, and the graphite electrode is more than 58%. In this way, the processing time is greatly reduced, and the manufacturing cost is reduced.

　　3: the graphite electrode is different from the traditional copper electrode. Many mold factory usually reserved in different copper electrode roughing and finishing, and the graphite electrode is used for almost the same, which reduces the number of CAD/CAM and the single machine, for this reason, to improve the accuracy of mold cavity to a great extent. Of course, mold factory made of copper electrode to the graphite electrode, first of all should be clear is how to use graphite materials and its consideration

　　His related factors. Today, some customers use graphite electrode discharge, which eliminates the mold cavity polishing and chemical polishing process is still able to achieve the desired surface finish. It is not possible to produce such a workpiece without increasing the time and polishing process. In addition, graphite is divided into different levels, using the appropriate level in the specific application of the graphite and EDM parameters to achieve the desired processing results, if the operators use the same parameter with copper electrode in EDM using graphite electrode, then the result would be disappointing. If the material of the electrode is strictly controlled, the graphite electrode can be arranged in a non loss state (less than 1%) when being processed, but the copper electrode is not used.

　　Graphite has the following copper incomparable quality characteristics:

　　* processing speed: high speed milling roughing 3 times faster than copper; high speed milling finishing copper faster than 5 times

　　* good machinability, can achieve complex geometric modeling

　　* light weight, density less than 1/4 of copper, easy to hold electrode

　　* can reduce the number of individual electrodes, because can be bundled into a combination electrode

　　* good thermal stability, no deformation, no burr.

　　application field

　　Carbon and graphite products are widely used in various fields of machinery, electronics, semiconductor, silicon, metallurgy, petroleum, chemical, textile, electrical appliances, motor, electric, transportation, communications, aviation, atomic energy, medicine, food, biological engineering, in order to give full play to the characteristics and potential of our company has been positive for customers in different fields provide technical support and service.

　　Carbon fiber carbon fiber plate is aligned in the same direction using the resin infiltration hardening formation of carbon fiber sheet, carbon fiber cloth can effectively solve the multi construction difficulties and high engineering problems, good reinforcing effect, convenient construction.

　　The use of high quality carbon fiber raw materials and good basic resin, carbon fiber sheet with high tensile strength, corrosion resistance, shock resistance, impact resistance and other good properties.

　　Carbon fiber sheet features tensile, seismic, good impact resistance

　　application area

　　Concrete beam bending, shear reinforcement, concrete slab bridge, reinforcement, concrete, masonry wall, shear wall reinforcement, bridge pier, pile column reinforcement, chimney, tunnel, water pool, reinforcement concrete pipe etc.. [1]

　　Test item editor

　　The surface density (kg/m -:2000), resin content (%),:42 (g/m -) fiber content, fiber volume content of:1050 (%) = 65, the thickness of (mm):1.3 + 0.05,:100 + 2 density (mm), tensile strength (N/mm -:2950), elastic modulus (N/mm2):185000

　　Technical characteristics

　　1, high strength and high efficiency

　　The tensile strength is more than ordinary steel several times, the elastic modulus is superior to steel, has excellent creep resistance, corrosion resistance and shock resistance.

　　2, light weight, flexibility is good

　　Carbon fiber with high specific strength, the quality is only 1/5 of steel, has a higher toughness, can be rolled, can be supplied with a larger length without overlapping.

　　3, convenient construction, easy to guarantee the quality of construction

　　The material does not need to be pre processed.

　　4, good durability and corrosion resistance

　　Corrosion resistance to acid, alkali, salt and atmospheric environment.

　　A few years ago, it was thought that the surface quality of parts processed with graphite could only reach VDI18. However, it has been shown that the surface quality of the workpiece processed by graphite can reach VDI12 or higher grade. Of course, this standard is not for all graphite materials, or by EDM traditional situation, such as crude graphite or conventional graphite can not reach the standard. In order to obtain the surface quality, various production conditions must be in the best fit state with graphite material. In this case, the size of the electrode, the choice of the type of graphite is the key factor, will play a decisive role. However, the important point is that the use of graphite materials can achieve very fine surface quality.

　　Many manufacturers of EDM equipment and manufacturers of graphite materials have made a lot of efforts. Today, they are able to provide customers with graphite processing specific processing equipment and processing parameters. In addition, graphite producers are also relying on their more refined graphite brands to meet customer demand.

　　However, the most important factor is that people must have the right choice of EDM equipment manufacturers and graphite manufacturers. Big deal situation often appear, such as some customers to sample processing will choose the most complex parts, and then to the equipment manufacturer for testing and processing. In fact, this type of components in the customer's products accounted for up to 1%. If the EDM equipment and processes are based on this standard, then there is no doubt that there will be a problem: 99% of the other conventional processing how to do?

　　Therefore, the equipment should be used to meet the needs of the 95% types of products. The rest of the products can be entrusted to other companies specializing in the production of special processing, or the use of a multiple electrode. In this case, we can also use the method to extend the discharge time or, if necessary, the copper electrode.

　　Advantages of graphite EDM

　　Graphite also has the following advantages:

　　The processing performance (to follow the rules for operating conditions).

　　The high thermal stability (thermal deformation will happen).

　　The light weight (for processing equipment)

　　I don't have to (for this essential burr automation system).

　　The ductility coefficient is low (small temperature change).

　　It can provide the best choice for a variety of processing conditions (coarse and fine grain graphite)

　　On the market, but also provide the electrode can be used (i.e., graphite products have been processed, can be immediately applied to EDM).