CN104649263A - Preparation method of carbon-graphite composite material - Google Patents
Preparation method of carbon-graphite composite material Download PDFInfo
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Abstract
The invention relates to a preparation method of a carbon-graphite composite material. The preparation method is characterized in that the carbon-graphite composite material is prepared from the following raw materials in percentage by weight: 1.5-2.5% of carbon black, 5%-8% of graphite with the particle size smaller than or equal to 1mm, 25%-30% of calcined petroleum coke powder with the particle size smaller than or equal to 0.075mm, 15%-20% of calcined petroleum coke with the particle size of 1mm-4mm, 10%-15% of electric calcined anthracite with the particle size of 4mm-10mm, 5%-10% of electric calcined anthracite with the particle size of 10mm-16mm, 5%-15% of calcined pitch coke with the particle size of 10mm-16mm, 18%-20% of coal pitch and short carbon fiber, wherein short carbon fiber is equal to 1%-3% of total weight of the raw materials. The carbon-graphite composite material is prepared by the steps of material preparation, mixed kneading, forming, roasting and graphitization and is excellent in performance, high in breaking strength, relatively good in thermal shock resistance and relatively low in expansion factor; the carbon-graphite composite material does not crack and break and has good stability.
Description
Technical field
The present invention relates to a kind of carbon graphite composite material preparation method, belong to specialty inorganic non-metallic material technical field.
Background technology
The characteristic of a series of excellences such as carbon graphite material has that density is little, intensity is large, high temperature resistant, resist chemical, radioprotective, antifatigue, high connductivity, high heat conduction, resistance to ablation, thermal expansion is little, physiological compatibility is good, is more and more applied in all trades and professions.
Ceramic is substantially all hard brittle material, as: brick, stone material, pottery, glass, cement concrete, carbon material.Another feature of hard brittle material, ultimate compression strength is higher, but anti-folding and shock resistance mechanical property very low.Most ceramic (comprising carbon graphite material) has this feature.
Carbon graphite material 90% is mainly used in steel melting furnace and aluminium cell and all kinds of mineral hot furnace, and its use occasion is usually the severe condition such as the corrosion of high temperature height electric current height and thermal vibration thermal shocking.Because carbon graphite material folding strength is low, poor toughness, use often to occur crackle, cracking, rupture, fall block, peel off and fall slag under these severe condition and fall the phenomenons such as grain, improve difficult point and focus that the folding strength of carbon graphite material and shaking property of heat resistanceheat resistant and toughness are the technological progress in enterprises of current charcoal graphite.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of carbon graphite composite material, and the material that the method prepares has good folding strength, shaking property of heat resistanceheat resistant and toughness.
For solving above technical problem, the technical solution used in the present invention is:
A kind of preparation method of carbon graphite composite material, raw material adopts following granularity and weight percent batching: carbon black 1.5-2.5%, ≤ 1mm graphite 5-8%, ≤ 0.075mm calcined petroleum coke powder 25-30%, 1 ~ 4mm calcined petroleum coke, 15-20%, 4 ~ l0mm electric calcined anthracite 10-15%, 10-16mm electric calcined anthracite 5 ~ 10%, 10-16mm calcines pitch coke 5 ~ 15%, coal-tar pitch 18-20%; Chopped carbon fiber is 1 ~ 3% of above raw material total amount.
Calcined petroleum coke powder and calcined petroleum coke are that electric calcined anthracite forms through more than about 1100-2000 DEG C temperature calcination through forming through about 1300 DEG C of calcinings, and calcining pitch coke forms through about 1300 DEG C of calcinings.Carbon black is graphitized carbon black, Shawinigan black, semi-reinforcing hydrocarbon black and relevant carbon black, and performance index are close with the common carbon brush carbon black feed stock of production.Natural graphite can be crystalline flake graphite also can be the amorphous graphite of low ash, and performance index are with to produce common electromechanics carbon and graphite products natural graphite starting material close.Coal-tar pitch can be medium temperature coal pitch can also be modified coal asphalt.Carbon graphite material is the same with other ceramic, and belong to hard brittle material, folding strength is low, and shock resistance is poor.And metallic substance feature is good toughness, High anti bending strength, good impact resistance.Add chopped carbon fiber to be significantly improved to sample folding strength, add the toughness of carbon graphite material sample, improve the shaking property of heat resistanceheat resistant of practical application.
Step comprises:
(1) batching, kneading, first carry out combined ingredient by carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and chopped carbon fiber, heat mediate after being dry mixed with coal-tar bond, forms composite plastic gonosome;
(2) shaping, composite plastic gonosome is prepared into charcoal element compound green compact body by moulding process;
(3) roasting, loads stoving oven by green, through roasting, makes carbon material;
(4) greying, loads graphitizing furnace by carbon material, through 2200-3000 DEG C of pyroprocessing, and obtained carbon graphite composite material.
As preferred technical scheme, described kneading, first carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, add chopped carbon fiber again after interval 5-6 minute to be dry mixed, the time of being dry mixed is 35-40 minutes, and being dry mixed temperature is 120-150 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 175 DEG C-185 DEG C carries out wet mixing, the wet mixing time is at 30-50 minute, kneading temperature is 160-165 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 125-145 DEG C, adds in mould and form composite plastic gonosome.
As preferred technical scheme, described is shaping, refers to the one in vibratory compaction, extrusion molding, compression molding, isostatic pressing.
As preferred technical scheme, adopt hydraulic standing vibratory compaction, main technologic parameters is: hydraulic pressure 4-7Mpa, and time of vibration is 3-7 minute; After vibration completes, pressure is kept to leave standstill 2-5 minute; After having left standstill, open mould, pull-out green water-spraying control 2-5 hour, coolant water temperature is 30-50 DEG C; After having cooled, be namely prepared into activated carbon composite element green.
As preferred technical scheme, described roasting completes according to following system,
1. shove charge system: green compact and green compact distance 100-120mm, green compact and kiln wall distance 150 1 250mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 300-500mm thickness;
2. temperature increasing schedule: be 3-5 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; Be 1.0-1.5 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; Be 2.5-3.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; Be 4-6 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; Be 5-15 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; Be 15-30 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; At top temperature 1200 DEG C-1300 DEG C insulation 30-60 hour;
3. to lower the temperature system: adopt naturally cooling mode, cooling 10-20 DEG C per hour.
4. product is cooled to can go out to be jealous of during 300-400 DEG C.
As preferred technical scheme, described carbon fiber is PAN base chopped carbon fiber or asphaltic base chopped carbon fiber.Described chopped carbon fiber length can be 10-200mm, and mean diameter is 5 microns-30 microns.Organic solvent was adopted in advance, as alcohol, acetone etc. carry out dispersion treatment before carbon fiber being added kneading machine.
Raw material of the present invention mainly adopts oil refining byproduct-refinery coke and stone coal, carbon black, natural graphite, pitch coke, metallurgical coke, carbon fiber to be siccative raw material, and these raw material constituent element major parts are broken into the granularity of 0-20mm; Carbon graphite material excellent property, High anti bending strength, heat resistanceheat resistant performance of shaking is more excellent, and the coefficient of expansion is less, does not split continuous good stability in actual use.
Embodiment
Embodiment 1
This embodiment as a comparison case, does not add chopped carbon fiber.
Batching is :≤1mm micro crystal graphite 5% ,≤0.075mm calcined petroleum coke 28%, 1 ~ 4mm calcined petroleum coke 15%, 4 ~ l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm calcines pitch coke 15%, Shawinigan black 2%, coal-tar pitch 20%.Additional 1% T300PAN chopped carbon fiber (diameter 12 μm, length 10mm).
(1) batching, kneading, first add in kneading machine by carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke, the time of being dry mixed is 35 minutes, and being dry mixed temperature is 120 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 175 DEG C carries out wet mixing, and the wet mixing time, kneading temperature was 160 DEG C at 30 minutes, forms composite plastic gonosome;
(2) shaping, composite plastic gonosome is adopted compression molding, forming pressure 60Mpa, sample size Ф 80 × 80mm, be prepared into charcoal element compound green compact body;
(3) roasting, loads stoving oven by green, through roasting, makes carbon material; Roasting completes according to following system:
1. shove charge system: green compact and green compact distance 100 mm, green compact and kiln wall distance 150mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 300 mm thickness;
2. temperature increasing schedule: be 3 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; It is 1.0 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; It is 2.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; It is 4 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; It is 5 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; It is 15 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; At top temperature 1200 DEG C insulation 30-60 hour;
3. to lower the temperature system: adopt naturally cooling mode, cooling 10-20 DEG C per hour.
4. product is cooled to can go out to be jealous of when 300 DEG C.
(4) greying, loads graphitizing furnace by carbon material, through 2500 DEG C of pyroprocessing, and obtained carbon graphite composite material.
Carry out mechanical workout again, carbon material and the graphite composite material of excellent property can be obtained.
The carbon material that table 1 embodiment 1 is obtained and graphite composite material quality index
Embodiment 2
Batching is :≤1mm micro crystal graphite 5% ,≤0.075mm calcined petroleum coke 28%, 1 ~ 4mm calcined petroleum coke 15%, 4 ~ l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm calcines pitch coke 15%, Shawinigan black 2%, coal-tar pitch 20%.Additional 1% T300PAN chopped carbon fiber (diameter 12 μm, length 10mm).
(1) batching, kneading, first carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, add chopped carbon fiber again after interval 5-6 minute to be dry mixed, the time of being dry mixed is 35 minutes, and being dry mixed temperature is 120 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 175 DEG C carries out wet mixing, and the wet mixing time, kneading temperature was 160 DEG C at 30 minutes, forms composite plastic gonosome;
(2) shaping, composite plastic gonosome is adopted compression molding, forming pressure 60Mpa, sample size Ф 80 × 80mm, be prepared into charcoal element compound green compact body;
(3) roasting, loads stoving oven by green, through roasting, makes carbon material; Roasting completes according to following system:
1. shove charge system: green compact and green compact distance 100 mm, green compact and kiln wall distance 150mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 300mm thickness;
2. temperature increasing schedule: be 3 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; It is 1.0 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; It is 2.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; It is 4 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; It is 5 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; It is 15 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; Top temperature 1200 DEG C insulation 30 hours;
3. to lower the temperature system: adopt naturally cooling mode, cooling per hour 10 DEG C.
4. product is cooled to can go out to be jealous of when 300 DEG C.
(4) greying, loads graphitizing furnace by carbon material, through 2500 DEG C of pyroprocessing, and obtained carbon graphite composite material.
Carry out mechanical workout again, carbon material and the graphite composite material of excellent property can be obtained.
The carbon material that table 2 embodiment 2 is obtained and graphite composite material quality index
Embodiment 3
Adopt embodiment 2 to prepare burden constant, additional 2% T300PAN chopped carbon fiber (diameter 12 μm, length 10mm), technique, as embodiment 1, records properties of sample index in table 3.
The carbon material that table 3 embodiment 3 is obtained and graphite composite material quality index
Embodiment 4
Adopt embodiment 2 to prepare burden constant, additional 3% T300PAN chopped carbon fiber (diameter 12 μm, length 10mm), technique, as embodiment 2, records properties of sample index in table 4.
The carbon material that table 4 embodiment 4 is obtained and graphite composite material quality index
Embodiment 5
Adopt embodiment 2 to prepare burden constant, respectively additional 3% asphaltic base chopped carbon fiber (diameter 20 μm, length 10mm), technique, as embodiment 2, records properties of sample index in table 5.
The carbon material that table 5 embodiment 5 is obtained and graphite composite material quality index
Can find out from embodiment 1-5, T300PAN chopped carbon fiber (diameter 12 μm is added under the batching of example 1 and the constant condition of processing requirement, length 10mm), overall quality index is improved, particularly folding strength value is improved significantly, and with the increase of PAN chopped carbon fiber add-on, folding strength value improves more obvious.Adding the improvement of 3% asphaltic base chopped carbon fiber (diameter 20 μm, length 10mm) to sample folding strength value and other quality indicator value, not add PAN chopped carbon fiber effective.Carbon graphite material is the same with other ceramic, and belong to hard brittle material, folding strength is low, and shock resistance is poor.And metallic substance feature is good toughness, High anti bending strength, good impact resistance.Add PAN chopped carbon fiber to be significantly improved to sample folding strength, add the toughness of carbon graphite material sample, improve the shaking property of heat resistanceheat resistant of practical application.
Embodiment 6
Batching is: 0.1mm micro crystal graphite 8%, 0.01mm calcined petroleum coke 25%, 1mm calcined petroleum coke 20%, 4mm electric calcined anthracite 11%, 10mm electric calcined anthracite 6.5%, 10mm calcining pitch coke 10%, Shawinigan black 1.5%, coal-tar pitch 18%.Additional 2% T300PAN chopped carbon fiber (diameter 5 μm, length 200mm).Chopped carbon fiber being added kneading machine adopted organic solvent-acetone to carry out dispersion treatment in the past in advance.
(1) batching, kneading, first carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, interval adds chopped carbon fiber again and is dry mixed after 6 minutes, the time of being dry mixed is 40 minutes, and being dry mixed temperature is 150 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 185 DEG C carries out wet mixing, and the wet mixing time was at 50 minutes, kneading temperature is 165 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 125 DEG C, adds in mould and form composite plastic gonosome;
(2) shaping; Adopt hydraulic standing vibratory compaction, main technologic parameters is: hydraulic pressure 4Mpa, and time of vibration is 3 minutes; After vibration completes, pressure is kept to leave standstill 2 minutes; After having left standstill, open mould, pull-out green water-spraying control 2 hours, coolant water temperature is 30 DEG C; After having cooled, be namely prepared into activated carbon composite element green.
(3) roasting, loads stoving oven by green, through roasting, makes carbon material; Roasting completes according to following system:
1. shove charge system: green compact and green compact distance 120 mm, green compact and kiln wall distance 250mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 500mm thickness;
2. temperature increasing schedule: be 5 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; It is 1.5 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; It is 3.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; It is 6 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; It is 15 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; It is 30 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; Slowly be warming up to 1300 DEG C again, be incubated 60 hours;
3. to lower the temperature system: adopt naturally cooling mode, cooling per hour 20 DEG C.
4. product is cooled to can go out to be jealous of when 400 DEG C.
(4) greying, loads graphitizing furnace by carbon material, through 2200 DEG C of pyroprocessing, and obtained carbon graphite composite material.
Carry out mechanical workout again, carbon material and the graphite composite material of excellent property can be obtained.
Embodiment 7
Batching is: 1mm natural graphite 7%, 0.075mm calcined petroleum coke 28%, 4mm calcined petroleum coke 16%, 10mm electric calcined anthracite 13%, 16mm electric calcined anthracite 10%, 16mm calcining pitch coke 5%, graphitized carbon black 2.5%, coal-tar pitch 18.5%.Additional 1% T300PAN chopped carbon fiber (diameter 15 μm, length 100mm).Chopped carbon fiber being added kneading machine adopted organic solvent alcohol to carry out dispersion treatment in the past in advance.
(1) batching, kneading, first carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, interval adds chopped carbon fiber again and is dry mixed after 6 minutes, the time of being dry mixed is 36 minutes, and being dry mixed temperature is 130 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 180 DEG C carries out wet mixing, and the wet mixing time was at 40 minutes, kneading temperature is 162 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 130 DEG C, adds in mould and form composite plastic gonosome;
(2) shaping; Adopt hydraulic standing vibratory compaction, main technologic parameters is: hydraulic pressure 7Mpa, and time of vibration is 7 minutes; After vibration completes, pressure is kept to leave standstill 5 minutes; After having left standstill, open mould, pull-out green water-spraying control 5 hours, coolant water temperature is 50 DEG C; After having cooled, be namely prepared into activated carbon composite element green.
(3) roasting, loads stoving oven by green, through roasting, makes carbon material; Roasting completes according to following system:
1. shove charge system: green compact and green compact distance 110 mm, green compact and kiln wall distance 200mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 400mm thickness;
2. temperature increasing schedule: be 4 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; It is 1.5 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; It is 2.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; It is 5 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; It is 10 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; It is 20 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; 1200 DEG C of insulations 50 hours;
3. to lower the temperature system: adopt naturally cooling mode, cooling per hour 15 DEG C.
4. product is cooled to can go out to be jealous of when 300 DEG C.
(4) greying, loads graphitizing furnace by carbon material, through 3000 DEG C of pyroprocessing, and obtained carbon graphite composite material.
Carry out mechanical workout again, carbon material and the graphite composite material of excellent property can be obtained.
Embodiment 8
Batching is: 1mm natural graphite 6%, 0.075mm calcined petroleum coke 26%, 4mm calcined petroleum coke 17%, 10mm electric calcined anthracite 15%, 16mm electric calcined anthracite 6%, 16mm calcining pitch coke 9%, graphitized carbon black 2%, coal-tar pitch 19%.Additional 3% T300PAN chopped carbon fiber (diameter 30 μm, length 150mm).
(1) batching, kneading, first carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, interval adds chopped carbon fiber again and is dry mixed after 6 minutes, the time of being dry mixed is 38 minutes, and being dry mixed temperature is 140 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 180 DEG C carries out wet mixing, and the wet mixing time was at 50 minutes, kneading temperature is 160 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 145 DEG C, adds in mould and form composite plastic gonosome;
(2) shaping; Adopt hydraulic standing vibratory compaction, main technologic parameters is: hydraulic pressure 6Mpa, and time of vibration is 6 minutes; After vibration completes, pressure is kept to leave standstill 4 minutes; After having left standstill, open mould, pull-out green water-spraying control 4 hours, coolant water temperature is 40 DEG C; After having cooled, be namely prepared into activated carbon composite element green.
(3) roasting, loads stoving oven by green, through roasting, makes carbon material; Roasting completes according to following system:
1. shove charge system: green compact and green compact distance 110 mm, green compact and kiln wall distance 240mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 350mm thickness;
2. temperature increasing schedule: be 4 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; It is 1.5 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; It is 2.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; It is 5 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; It is 18 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; It is 25 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; 1200 DEG C of insulations 40 hours;
3. to lower the temperature system: adopt naturally cooling mode, cooling per hour 10 DEG C.
4. product is cooled to can go out to be jealous of when 350 DEG C.
(4) greying, loads graphitizing furnace by carbon material, through 3000 DEG C of pyroprocessing, and obtained carbon graphite composite material.
Carry out mechanical workout again, carbon material and the graphite composite material of excellent property can be obtained.
Claims (8)
1. the preparation method of a carbon graphite composite material, it is characterized in that: raw material adopts following granularity and weight percent batching: carbon black 1.5-2.5%, ≤ 1mm graphite 5-8%, ≤ 0.075mm calcined petroleum coke powder 25-30%, 1 ~ 4mm calcined petroleum coke, 15-20%, 4 ~ l0mm electric calcined anthracite 10-15%, 10-16mm electric calcined anthracite 5 ~ 10%, 10-16mm calcines pitch coke 5 ~ 15%, coal-tar pitch 18-20%; Chopped carbon fiber is 1 ~ 3% of above raw material total amount, and step comprises:
(1) batching, kneading, first carry out combined ingredient by carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite, calcining pitch coke and chopped carbon fiber, heat mediate after being dry mixed with coal-tar bond, forms composite plastic gonosome;
(2) shaping, composite plastic gonosome is prepared into charcoal element compound green compact body by moulding process;
(3) roasting, loads stoving oven by green, through roasting, makes carbon material;
(4) greying, loads graphitizing furnace by carbon material, through 2200-3000 DEG C of pyroprocessing, and obtained carbon graphite composite material.
2. method according to claim 1, is characterized in that:
Described kneading, first carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcining pitch coke are added in kneading machine, add chopped carbon fiber again after interval 5-6 minute to be dry mixed, the time of being dry mixed is 35-40 minutes, and being dry mixed temperature is 120-150 DEG C; When being dry mixed temperature and reaching time and the temperature of setting, the coal-tar pitch adding 175 DEG C-185 DEG C carries out wet mixing, the wet mixing time is at 30-50 minute, kneading temperature is 160-165 DEG C, thickener after kneading is carried out cool material, when thickener temperature is down to 125-145 DEG C, adds in mould and form composite plastic gonosome.
3. method according to claim 1, is characterized in that: described is shaping, refers to the one in vibratory compaction, extrusion molding, compression molding, isostatic pressing.
4. the method according to claim 1 or 3, is characterized in that: adopt hydraulic standing vibratory compaction, main technologic parameters is: hydraulic pressure 4-7Mpa, and time of vibration is 3-7 minute; After vibration completes, pressure is kept to leave standstill 2-5 minute; After having left standstill, open mould, pull-out green water-spraying control 2-5 hour, coolant water temperature is 30-50 DEG C; After having cooled, be namely prepared into activated carbon composite element green.
5. method according to claim 1, is characterized in that:
Described roasting completes according to following system,
1. shove charge system: green compact and green compact distance 100-120mm, green compact and kiln wall distance 150 1 250mm, the metallurgical coke particulate of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke particulate of 300-500mm thickness;
2. temperature increasing schedule: be 3-5 DEG C per hour from room temperature to a 230 DEG C temperature range average heating speed; Be 1.0-1.5 DEG C per hour at 230 DEG C to 500 DEG C temperature range average heating speeds; Be 2.5-3.5 DEG C per hour at 500 DEG C to 600 DEG C temperature range average heating speeds; Be 4-6 DEG C per hour at 600 DEG C to 800 DEG C temperature range average heating speeds; Be 5-15 DEG C per hour at 800 DEG C to 900 DEG C temperature range average heating speeds; Be 15-30 DEG C per hour at 900 DEG C to 1200 DEG C temperature range average heating speeds; At top temperature 1200 DEG C-1300 DEG C insulation 30-60 hour;
3. to lower the temperature system: adopt naturally cooling mode, cooling 10-20 DEG C per hour;
4. product is cooled to can go out to be jealous of during 300-400 DEG C.
6. method according to claim 1, is characterized in that: described chopped carbon fiber is PAN base carbon fibre or asphalt base carbon fiber.
7. the method according to claim 1 or 6, is characterized in that: described chopped carbon fiber length can be 10-200mm, and mean diameter is 5 microns-30 microns.
8. method according to claim 1 and 2, is characterized in that: before chopped carbon fiber being added kneading machine, adopt organic solvent to carry out dispersion treatment in advance.
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