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Copper graphite can not be compared with the following quality characteristics:
processing speed: High speed milling rough times higher than copper block 3; high-speed milling finishing times than the copper block 5
good machinability and can achieve complex geometric shapes
light weight, less than the density of copper 1/4, easy clamping electrode
can reduce the number of individual electrodes, because the combination of electrodes can be made binding
thermal stability, deformation and no processing glitches
nature of graphite electrodes , use , 1
classification and technical standards
First, the nature of graphite
the crystallization of graphite carbon minerals. 1565 years as a mineral is found, 1779 to determine its composition of carbon, 1789 years named " graphite " (in Greek " wrote " meaning.) Graphite color is black color, crystal hexagonal plates, but rare, generally showed a thin sheet or flake-like, earthy aggregates for aphanitic body. Soft, the hardness is small, Mohs hardness 1-2, can contaminate the paper. Proportion 2.1 - 2.3. Aaaaa a group with a very complete cleavage.
room temperature, graphite has good chemical stability to acid, alkali, organic solvents, corrosion resistance, but the high temperature, oxidation.
Second, the use of graphite
because graphite has many excellent properties, which in the metallurgical, mechanical, electrical, chemical, textile, defense and other industries widely applied. 1
do refractories
One of the main purposes of graphite is the production of refractory materials, including bricks, crucibles, continuous casting powder, mold cores, mold detergents and high temperature materials .
crucible and related products with a graphite-made molding and refractory crucible and its related products such as crucibles, retorts, stopper heads and nozzles, etc., with high fire resistance, low thermal expansion, melting metal process, by metal infiltration and when erosion is also stable, good thermal shock under high temperature stability and excellent thermal conductivity, so the graphite crucible and its related products are widely used process of molten metal directly .
2
steel
graphite and other impurities in the material for the steel industry can be used as carbon agent. Carburizing carbon material used in a wide range, including the artificial graphite, petroleum coke, metallurgical coke and natural graphite. Worldwide agents graphite carbon steel is still one of the main purposes of graphite earthy.
3
conductive material
graphite is widely used in the electrical industry as electrodes, brushes, carbon rod, carbon tubes, mercury rectifier cathode, graphite gaskets, telephone parts, TV picture tube coating and so on. Among the most widely used graphite electrodes in various kinds of smelting steel, iron alloy, the use of graphite electrodes, then a strong electric current through electrodes into the melting zone, arc, so that electrical energy into heat energy, temperature to 2000 degrees to achieve the melting or anti- should be the goal. In addition, electrolysis of magnesium, aluminum, sodium, the cell's anode is also used graphite electrodes. Production of silicon carbide resistance furnace with graphite electrodes are conductive materials for the burner.
4
for wear and lubrication materials
often graphite as lubricant in the machinery industry. Lubricants are often not in the high-speed, high temperature and high pressure conditions of use, and wear resistant graphite material can -200 --- 2000 temperature and at very high speeds without sliding oil work. Many transport corrosive media equipment, extensive use is made of graphite materials, piston rings, seals and bearings, they are running, do not need added oil, graphite is a lot of metal processing (Roberts, trombone) is a good lubricant.
5
for corrosion-resistant materials
Graphite has good chemical stability. After special processing of graphite, corrosion resistant, thermal conductivity, low permeability, and is widely used in production of heat exchangers, reactors, condensation control, burning tower, absorption tower, chillers, heaters, filters, , pumps and other equipment. These devices are used in petrochemical, hydrometallurgy, acid production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
6
for casting, foundry, die and high temperature metallurgical materials
the graphite expansion coefficient, and thermal shock capability changes, the mold can be used as glassware, the use of graphite, black metal by the casting dimensional accuracy, smooth surface, high yield, without processing, or a little processing to can be used, thus saving a lot of metal.
7
for the atomic energy industry and defense industry
Rust-proof material for scaling 8
graphite to prevent boiler scaling, the unit tests showed that the water by adding a certain amount of graphite powder (about a ton of water used 4-5g) , to prevent the boiler surface scaling. Besides graphite coated metal chimney, roof, bridge, pipeline corrosion and rust can be.
classification and technical standards
First, the nature of graphite
the crystallization of graphite carbon minerals. 1565 years as a mineral is found, 1779 to determine its composition of carbon, 1789 years named " graphite " (in Greek " wrote " meaning.) Graphite color is black color, crystal hexagonal plates, but rare, generally showed a thin sheet or flake-like, earthy aggregates for aphanitic body. Soft, the hardness is small, Mohs hardness 1-2, can contaminate the paper. Proportion 2.1 - 2.3. Aaaaa a group with a very complete cleavage.
room temperature, graphite has good chemical stability to acid, alkali, organic solvents, corrosion resistance, but the high temperature, oxidation.
Second, the use of graphite
because graphite has many excellent properties, which in the metallurgical, mechanical, electrical, chemical, textile, defense and other industries widely applied. 1
do refractories
One of the main purposes of graphite is the production of refractory materials, including bricks, crucibles, continuous casting powder, mold cores, mold detergents and high temperature materials .
crucible and related products with a graphite-made molding and refractory crucible and its related products such as crucibles, retorts, stopper heads and nozzles, etc., with high fire resistance, low thermal expansion, melting metal process, by metal infiltration and when erosion is also stable, good thermal shock under high temperature stability and excellent thermal conductivity, so the graphite crucible and its related products are widely used process of molten metal directly .
2
steel
graphite and other impurities in the material for the steel industry can be used as carbon agent. Carburizing carbon material used in a wide range, including the artificial graphite, petroleum coke, metallurgical coke and natural graphite. Worldwide agents graphite carbon steel is still one of the main purposes of graphite earthy.
3
conductive material
graphite is widely used in the electrical industry as electrodes, brushes, carbon rod, carbon tubes, mercury rectifier cathode, graphite gaskets, telephone parts, TV picture tube coating and so on. Among the most widely used graphite electrodes in various kinds of smelting steel, iron alloy, the use of graphite electrodes, then a strong electric current through electrodes into the melting zone, arc, so that electrical energy into heat energy, temperature to 2000 degrees to achieve the melting or anti- should be the goal. In addition, electrolysis of magnesium, aluminum, sodium, the cell's anode is also used graphite electrodes. Production of silicon carbide resistance furnace with graphite electrodes are conductive materials for the burner.
4
for wear and lubrication materials
often graphite as lubricant in the machinery industry. Lubricants are often not in the high-speed, high temperature and high pressure conditions of use, and wear resistant graphite material can -200 --- 2000 temperature and at very high speeds without sliding oil work. Many transport corrosive media equipment, extensive use is made of graphite materials, piston rings, seals and bearings, they are running, do not need added oil, graphite is a lot of metal processing (Roberts, trombone) is a good lubricant.
5
for corrosion-resistant materials
Graphite has good chemical stability. After special processing of graphite, corrosion resistant, thermal conductivity, low permeability, and is widely used in production of heat exchangers, reactors, condensation control, burning tower, absorption tower, chillers, heaters, filters, , pumps and other equipment. These devices are used in petrochemical, hydrometallurgy, acid production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
6
for casting, foundry, die and high temperature metallurgical materials
the graphite expansion coefficient, and thermal shock capability changes, the mold can be used as glassware, the use of graphite, black metal by the casting dimensional accuracy, smooth surface, high yield, without processing, or a little processing to can be used, thus saving a lot of metal.
7
for the atomic energy industry and defense industry
Rust-proof material for scaling 8
graphite to prevent boiler scaling, the unit tests showed that the water by adding a certain amount of graphite powder (about a ton of water used 4-5g) , to prevent the boiler surface scaling. Besides graphite coated metal chimney, roof, bridge, pipeline corrosion and rust can be.
