CN113912398A - Preparation method of graphene isostatic pressing product - Google Patents
Preparation method of graphene isostatic pressing product Download PDFInfo
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- CN113912398A CN113912398A CN202111094392.9A CN202111094392A CN113912398A CN 113912398 A CN113912398 A CN 113912398A CN 202111094392 A CN202111094392 A CN 202111094392A CN 113912398 A CN113912398 A CN 113912398A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
- C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention belongs to the technical field of graphene isostatic pressing production, and particularly relates to a preparation method of a graphene isostatic pressing product, which comprises the following steps: s1, preparing asphalt coke powder, calcined coke, graphene slurry and resin; s2, adding the asphalt coke and the calcined coke into a kneading pot for dry mixing; s3, heating the normal temperature resin and then adding the normal temperature resin into a kneading pot; then adding graphene slurry, wherein the graphene slurry covers the whole powder surface in a sprinkling manner; when kneading is carried out, vacuumizing the kneading pot; taking out of the pot to obtain paste; s4, cooling the paste, and grinding the paste into powder; bagging the milled paste, vacuumizing, and then molding and pressing; s5, roasting the formed product for one time, and discharging the roasted product; and S6, graphitizing the product after the roasting treatment. The invention is formed by kneading asphalt coke, calcined coke, resin and graphene together. The isostatic pressing product material meeting the requirements is manufactured through reasonable design and blending.
Description
Technical Field
The invention belongs to the technical field of graphene isostatic pressing production, and particularly relates to a preparation method of a graphene isostatic pressing product.
Background
With the continuous development of science and technology, the special carbon industry is also continuously improved, and the isostatic pressing graphite quality is higher and higher, so that the production of the isostatic pressing material which meets the high standard of the current market becomes a difficult problem, and the special carbon industry makes a contribution to the foreign special carbon industry.
In the prior art, pitch coke and pitch are mixed and kneaded according to a certain proportion, molded, roasted once, impregnated once, roasted twice, impregnated twice, roasted three times and graphitized. The prior art has the defects of complicated working procedures, high cost and high labor cost.
Disclosure of Invention
Aiming at the technical problems, the invention provides a preparation method of a graphene isostatic pressing product, which is simple to operate and low in cost; and can also improve the physical and chemical indexes, oxidation resistance, mechanical property, electrical property and service life of the product.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of a graphene isostatic pressing product comprises the following steps:
s1, preparing asphalt coke powder, calcined coke, graphene slurry and resin;
s2, adding the asphalt coke and the calcined coke into a kneading pot for dry mixing;
s3, heating the normal temperature resin to flow, adding the normal temperature resin into a kneading pot, and fully fusing the powder and the resin together; then adding graphene slurry, wherein the graphene slurry covers the whole powder surface in a sprinkling manner; when kneading is carried out, vacuumizing the kneading pot; taking out of the pot to obtain paste;
s4, cooling the paste, and grinding the paste into powder; bagging the milled paste, vacuumizing, and then putting into isostatic pressing equipment for molding and pressing;
s5, roasting the pressed formed product in a vacuum roasting furnace for one time, and discharging the roasted product;
and S6, graphitizing the roasted product.
In said S1: the content of asphalt coke powder is 50%, the content of calcined coke is 20%, the content of graphene slurry is 10%, and the content of resin is 20%.
In said S2: dry blending was carried out for 2.5 hours and then for 1 hour with heating to 185 ℃ in a kneading kettle.
In said S3: the fusion time was 2 hours.
In said S3: the kneading temperature was controlled at 170 ℃ and the kneading time was 1.5 hours.
In said S4: the ground particles had a particle size of 1200 mesh, and the paste was left at room temperature for 72 hours and then bagged.
In said S5: the roasting process requires that the temperature is controlled at 980 ℃ and the time is 612 hours; and discharging the furnace when the furnace temperature is reduced to below 80 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention is formed by kneading asphalt coke, calcined coke, resin and graphene together. The isostatic pressing product material meeting the requirements is manufactured through reasonable design and blending.
Heating the normal-temperature resin to flow, and adding the normal-temperature resin into a kneading pot to fully fuse the powder and the resin together; then adding graphene slurry, and covering the whole powder surface with the graphene slurry in a sprinkling mode. And the final product has higher physical and chemical indexes than isostatic pressing graphite produced in the traditional process, and the oxidation resistance, the mechanical property, the electrical property and the service life are greatly improved.
The method has the advantages of simple operation, greatly improved environment, reduced cost, remarkable economic benefit and the like.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A preparation method of a graphene isostatic pressing product comprises the following steps:
s1, preparing asphalt coke powder, calcined coke, graphene slurry and resin;
s2, adding the asphalt coke and the calcined coke into a kneading pot for dry mixing;
s3, heating the normal temperature resin to flow, adding the normal temperature resin into a kneading pot, and fully fusing the powder and the resin together; then adding graphene slurry, wherein the graphene slurry covers the whole powder surface in a sprinkling manner; when kneading is carried out, vacuumizing the kneading pot; taking out of the pot to obtain paste;
s4, cooling the paste, and grinding the paste into powder; bagging the milled paste, vacuumizing, and then putting into isostatic pressing equipment for molding and pressing;
s5, roasting the pressed formed product in a vacuum roasting furnace for one time, and discharging the roasted product;
and S6, graphitizing the roasted product.
The preferred embodiments of the present invention are as follows:
the raw materials are as follows: 50% of asphalt coke powder produced by the factory, 20% of calcined coke, 10% of graphene slurry and 20% of resin.
Firstly, putting the asphalt coke and the calcined coke into a kneading pot according to the percentage for dry mixing for 2.5 hours, and then heating the kneading pot for dry mixing for 1 hour, wherein the kneading temperature is 185 ℃.
Heating normal temperature resin to flow, adding the resin into a kneading pot, fully fusing the powder and the resin together for 2 hours, then adding graphene slurry, covering the whole powder surface in a sprinkling mode when the graphene slurry is added, controlling the temperature at 170 ℃, kneading for 1.5 hours, vacuumizing the kneading pot during the period, continuously vacuumizing for 10 minutes after the vacuum degree meets the requirement, and taking the paste out of the pot for 160 ℃.
And (3) after the paste is cooled, grinding the paste, controlling the granularity of the ground powder to be about 1200 meshes, placing the ground paste at room temperature for 72 hours, bagging, lifting up under the pier 3, sealing, vacuumizing for 1.8 hours, placing the filled bag into isostatic pressing for forming and pressing, and controlling the pressing pressure to be 180 Mpa.
And (3) roasting the pressed formed product in a vacuum roasting furnace for one time, wherein the roasting process requirement is that the temperature is controlled at 980 ℃ and the time is 612 hours.
And discharging the carbon strips when the furnace temperature is reduced to below 80, wherein the performance measurement result of the discharged carbon strips is as follows: the bulk density is 1.75g/cm3The resistivity was 26 μ Ω m, the compressive strength was 102mpa, and the flexural strength was 65 mpa.
Then graphitizing treatment is carried out, the graphitizing temperature only needs to be controlled at about 2300 ℃, 30CM of the top material of the cover is removed immediately after the furnace is electrified and fired at 2500 ℃ for 72 hours, and the physical and chemical indexes of the special carbon product after being cooled and discharged from the furnace are that the body density is 1.90g/CM3The resistivity was 10 μ Ω m, the compressive strength was 145mpa, and the flexural strength was 88 mpa. Compared with the isostatic pressing graphite produced by the traditional process, the physical and chemical indexes of the isostatic pressing graphite are high, and the oxidation resistance, the mechanical property, the electrical property and the service life are greatly improved.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (7)
1. A preparation method of a graphene isostatic pressing product is characterized by comprising the following steps:
s1, preparing asphalt coke powder, calcined coke, graphene slurry and resin;
s2, adding the asphalt coke and the calcined coke into a kneading pot for dry mixing;
s3, heating the normal temperature resin to flow, adding the normal temperature resin into a kneading pot, and fully fusing the powder and the resin together; then adding graphene slurry, wherein the graphene slurry covers the whole powder surface in a sprinkling manner; when kneading is carried out, vacuumizing the kneading pot; taking out of the pot to obtain paste;
s4, cooling the paste, and grinding the paste into powder; bagging the milled paste, vacuumizing, and then putting into isostatic pressing equipment for molding and pressing;
s5, roasting the pressed formed product in a vacuum roasting furnace for one time, and discharging the roasted product;
and S6, graphitizing the roasted product.
2. The method for preparing a graphene isostatic pressing product according to claim 1, wherein in S1: the content of asphalt coke powder is 50%, the content of calcined coke is 20%, the content of graphene slurry is 10%, and the content of resin is 20%.
3. The method for preparing a graphene isostatic pressing product according to claim 1, wherein in S2: dry blending was carried out for 2.5 hours and then for 1 hour with heating to 185 ℃ in a kneading kettle.
4. The method for preparing a graphene isostatic pressing product according to claim 1, wherein in S3: the fusion time was 2 hours.
5. The method for preparing a graphene isostatic pressing product according to claim 1, wherein in S3: the kneading temperature was controlled at 170 ℃ and the kneading time was 1.5 hours.
6. The method for preparing a graphene isostatic pressing product according to claim 1, wherein in S4: the ground particles had a particle size of 1200 mesh, and the paste was left at room temperature for 72 hours and then bagged.
7. The method for preparing a graphene isostatic pressing product according to claim 1, wherein in S5: the roasting process requires that the temperature is controlled at 980 ℃ and the time is 612 hours; and discharging the furnace when the furnace temperature is reduced to below 80 ℃.
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| CN202111094392.9A CN113912398A (en) | 2021-09-17 | 2021-09-17 | Preparation method of graphene isostatic pressing product |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102448880A (en) * | 2009-05-26 | 2012-05-09 | 创业发展联盟技术有限公司 | Carbon material and method for producing the same |
| CN106981657A (en) * | 2017-05-26 | 2017-07-25 | 成都海成远创科技有限公司 | A kind of graphite cathode material and preparation method thereof |
| CN108585865A (en) * | 2018-06-06 | 2018-09-28 | 大同新成新材料股份有限公司 | A kind of preparation method of graphene carbon material used as anode |
| CN108640681A (en) * | 2018-06-06 | 2018-10-12 | 大同新成新材料股份有限公司 | A kind of preparation method of special graphite carbon material |
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- 2021-09-17 CN CN202111094392.9A patent/CN113912398A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102448880A (en) * | 2009-05-26 | 2012-05-09 | 创业发展联盟技术有限公司 | Carbon material and method for producing the same |
| CN106981657A (en) * | 2017-05-26 | 2017-07-25 | 成都海成远创科技有限公司 | A kind of graphite cathode material and preparation method thereof |
| CN108585865A (en) * | 2018-06-06 | 2018-09-28 | 大同新成新材料股份有限公司 | A kind of preparation method of graphene carbon material used as anode |
| CN108640681A (en) * | 2018-06-06 | 2018-10-12 | 大同新成新材料股份有限公司 | A kind of preparation method of special graphite carbon material |
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Application publication date: 20220111 |