CN113929461A - Preparation method of isotropic carbon material - Google Patents
Preparation method of isotropic carbon material Download PDFInfo
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- CN113929461A CN113929461A CN202111093103.3A CN202111093103A CN113929461A CN 113929461 A CN113929461 A CN 113929461A CN 202111093103 A CN202111093103 A CN 202111093103A CN 113929461 A CN113929461 A CN 113929461A
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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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- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
Abstract
The invention belongs to the technical field of carbon material preparation, and particularly relates to a preparation method of an isotropic carbon material, which comprises the following steps: s1, preparing raw materials: preparing special baked product powder, needle coke and asphalt; s2, dry mixing: adding the special roasted product powder and the needle coke powder into a kneading pot for dry mixing; s3, kneading: melting the asphalt, adding the melted asphalt into a kneading pot of S2 for kneading to obtain paste; s4, rolling into sheets: rolling the paste material into sheets by a sheet rolling machine; s5, grinding and granulating: grinding the powder after the rolling into pieces for the first time, granulating after grinding, and grinding for the second time after granulating; s6, isostatic pressing: carrying out isostatic pressing treatment on the powder after the secondary grinding; s7, primary roasting: and (4) roasting the pressed formed product for one time, and discharging the roasted product. The invention relates to an isotropic carbon material which is formed by processing the existing special carbon material, kneading needle coke and pitch together and using an isobaric machine.
Description
Technical Field
The invention belongs to the technical field of carbon material preparation, and particularly relates to a preparation method of an isotropic carbon material.
Background
With the continuous development of economy in China, especially the continuous growth in the carbon material industry, the requirements on carbon materials are higher and higher; in particular, carbon materials used for high-precision instruments are required to have uniform indices from inside to outside and from top to bottom. Therefore, the isotropic carbon material for high-precision instruments must be invented from the key point.
The existing common technical scheme is as follows: kneading the pitch coke and pitch at a certain temperature, and performing primary roasting → pitch impregnation → secondary roasting → graphitization on the molded product.
The main disadvantages are: has the problems of time and labor waste, increased cost, slow production, and incapability of achieving the same index, etc.
Disclosure of Invention
Aiming at the technical problems, the invention provides a preparation method of an isotropic carbon material, and the method can meet the requirements of the physical and chemical indexes of the isotropic carbon material only by roasting once.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method of preparing an isotropic carbon material comprising the steps of:
s1, preparing raw materials: preparing special baked product powder, needle coke and asphalt;
s2, dry mixing: adding the special roasted product powder and the needle coke powder into a kneading pot for dry mixing;
s3, kneading: melting the asphalt, adding the melted asphalt into a kneading pot of S2 for kneading to obtain paste;
s4, rolling into sheets: rolling the paste material into sheets by a sheet rolling machine;
s5, grinding and granulating: grinding the powder after the rolling into pieces for the first time, granulating after grinding, and grinding for the second time after granulating;
s6, isostatic pressing: carrying out isostatic pressing treatment on the powder after the secondary grinding;
s7, primary roasting: and (4) roasting the pressed formed product for one time, and discharging the roasted product.
In said S1: the content of the special roasted product powder is 60%, the content of the needle coke is 10%, and the content of the asphalt is 30%.
In said S1: the special roasted product, the needle coke and the solid asphalt are ground to the particle size of 300 meshes.
In said S2: the dry blending time was 2.5 hours and the temperature was 195 ℃.
In said S3: the kneading time was 1.5 hours and the paste temperature was 180 ℃.
In said S5: the grain diameter after primary grinding is below 2 mm, and the purity is more than 85%; the granulation granularity is 10 mm; the secondary grinding granularity is 500 meshes.
In said S6: filling the secondarily-ground powder into a clinker bag, vacuumizing for 3 hours, then putting the product into a high-pressure tank for vacuumizing, and pressurizing after the high-pressure tank reaches a vacuum degree, wherein the pressure is controlled at 30Mpa for 30 minutes; then taking out the product, putting the product into an isostatic pressing machine, pressurizing to 300Mpa, and maintaining the pressure for 1.5 hours.
In said S6: the roasting process requires that the temperature is controlled at 1500 ℃ and the time is 260 hours; and discharging the furnace when the furnace temperature is reduced to below 300 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to an isotropic carbon material which is formed by processing the existing special carbon material, kneading needle coke and pitch together and using an isobaric machine. And the isotropic carbon material meeting the requirements is manufactured through reasonable design and blending. The method has the advantages of simple operation, greatly improved environment, reduced cost, remarkable economic benefit and the like. The requirements of physical and chemical indexes of the isotropic carbon material can be met only by roasting once.
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 method of preparing an isotropic carbon material comprising the steps of:
s1, preparing raw materials: preparing special baked product powder, needle coke and asphalt;
s2, dry mixing: adding the special roasted product powder and the needle coke powder into a kneading pot for dry mixing;
s3, kneading: melting the asphalt, adding the melted asphalt into a kneading pot of S2 for kneading to obtain paste;
s4, rolling into sheets: rolling the paste material into sheets by a sheet rolling machine;
s5, grinding and granulating: grinding the powder after the rolling into pieces for the first time, granulating after grinding, and grinding for the second time after granulating;
s6, isostatic pressing: carrying out isostatic pressing treatment on the powder after the secondary grinding;
s7, primary roasting: and (4) roasting the pressed formed product for one time, and discharging the roasted product.
The preferred embodiment is as follows:
the raw materials are as follows: the content of the special roasted product powder is 60%, the content of the needle coke is 10%, and the content of the asphalt is 30%.
Grinding the special roasted product, the needle coke and the solid asphalt to the particle size of 300 meshes.
Firstly, the special roasted product powder and the needle coke powder are put into a kneading pot according to the percentage for dry mixing for 2.5 hours, and the kneading temperature is 195 ℃. And then melting the asphalt, putting the melted asphalt into a kneading pot according to the percentage for kneading, wherein the kneading time is 1.5 hours, and the paste temperature after taking out of the pot is 180 ℃.
After the paste is kneaded, primary sheet rolling is carried out on a sheet rolling machine, the milled powder is milled after sheet rolling, the grain size of the milled powder is less than 2 mm, the purity requirement is more than 85%, the milled powder enters a granulator to be granulated secondarily, the granulation grain size is controlled to be 10 mm, then the milled powder is milled again, the grain size of the milled powder is controlled to be 500 meshes, and the purity requirement is more than 90%.
Putting the ground powder into a clinker bag, vacuumizing for 3 hours, putting the product into a high-pressure tank, vacuumizing, pressurizing after the high-pressure tank reaches a vacuum degree, controlling the pressure at 30Mpa for 30 minutes, taking the product out, putting the product into an isostatic press, pressurizing to 300Mpa, maintaining the pressure for 1.5 hours, and decompressing to take out the product.
Roasting the pressed formed product for one time, wherein the roasting process requirement is that the temperature is controlled at 1500 ℃ and the time is 260 hours; and discharging the furnace when the furnace temperature is reduced to below 300 ℃.
The performance test results of the carbon strip after the carbon strip is taken out of the furnace are as follows: the bulk density is 1.72g/cm3The resistivity was 25.8. mu. omega. m, the compressive strength was 120mpa, the flexural strength was 89mpa, and the Shore hardness was 96 HS.
According to the performance result, the isotropic carbon material meeting the requirements is manufactured through reasonable design and blending.
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 (8)
1. A method for preparing an isotropic carbon material, comprising the steps of:
s1, preparing raw materials: preparing special baked product powder, needle coke and asphalt;
s2, dry mixing: adding the special roasted product powder and the needle coke powder into a kneading pot for dry mixing;
s3, kneading: melting the asphalt, adding the melted asphalt into a kneading pot of S2 for kneading to obtain paste;
s4, rolling into sheets: rolling the paste material into sheets by a sheet rolling machine;
s5, grinding and granulating: grinding the powder after the rolling into pieces for the first time, granulating after grinding, and grinding for the second time after granulating;
s6, isostatic pressing: carrying out isostatic pressing treatment on the powder after the secondary grinding;
s7, primary roasting: and (4) roasting the pressed formed product for one time, and discharging the roasted product.
2. The method of claim 1, wherein in S1: the content of the special roasted product powder is 60%, the content of the needle coke is 10%, and the content of the asphalt is 30%.
3. The method of claim 1, wherein in S1: the special roasted product, the needle coke and the solid asphalt are ground to the particle size of 300 meshes.
4. The method of claim 1, wherein in S2: the dry blending time was 2.5 hours and the temperature was 195 ℃.
5. The method of claim 1, wherein in S3: the kneading time was 1.5 hours and the paste temperature was 180 ℃.
6. The method of claim 1, wherein in S5: the grain diameter after primary grinding is below 2 mm, and the purity is more than 85%; the granulation granularity is 10 mm; the secondary grinding granularity is 500 meshes.
7. The method of claim 1, wherein in S6: filling the secondarily-ground powder into a clinker bag, vacuumizing for 3 hours, then putting the product into a high-pressure tank for vacuumizing, and pressurizing after the high-pressure tank reaches a vacuum degree, wherein the pressure is controlled at 30Mpa for 30 minutes; then taking out the product, putting the product into an isostatic pressing machine, pressurizing to 300Mpa, and maintaining the pressure for 1.5 hours.
8. The method of claim 1, wherein in S6: the roasting process requires that the temperature is controlled at 1500 ℃ and the time is 260 hours; and discharging the furnace when the furnace temperature is reduced to below 300 ℃.
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| CN202111093103.3A CN113929461A (en) | 2021-09-17 | 2021-09-17 | Preparation method of isotropic carbon material |
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| CN202111093103.3A CN113929461A (en) | 2021-09-17 | 2021-09-17 | Preparation method of isotropic carbon material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634361A (en) * | 2022-03-02 | 2022-06-17 | 五星新材科技有限公司 | Preparation method of isotropic isostatic pressing graphite with fine structure |
| CN114956847A (en) * | 2022-05-09 | 2022-08-30 | 合肥工业大学 | Preparation method of needle coke reinforced pure carbon pantograph carbon slide plate |
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|---|---|---|---|---|
| WO1980001683A1 (en) * | 1979-02-09 | 1980-08-21 | Maruzen Petrochem Co Ltd | Process for producing high-density,high-strength carbon and graphite material |
| CN102502603A (en) * | 2011-11-01 | 2012-06-20 | 雅安恒圣高纯石墨科技有限责任公司 | Production process of large isotropic and isostatic high purity graphite with fine particles |
| CN105668553A (en) * | 2015-12-31 | 2016-06-15 | 平顶山东方碳素股份有限公司 | Process of preparing high-strength carbon material from waste materials |
| CN107805070A (en) * | 2017-10-30 | 2018-03-16 | 大同新成新材料股份有限公司 | A kind of graphene carbon slide plate |
| CN107986786A (en) * | 2017-11-24 | 2018-05-04 | 大同新成新材料股份有限公司 | A kind of graphite product and production method |
| CN108585866A (en) * | 2018-06-06 | 2018-09-28 | 大同新成新材料股份有限公司 | A kind of subway slide plate carbon preparation method |
| 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 |
| CN112408985A (en) * | 2020-10-22 | 2021-02-26 | 中钢集团新型材料（浙江）有限公司 | Preparation method of high-performance fine isostatic pressing graphite |
-
2021
- 2021-09-17 CN CN202111093103.3A patent/CN113929461A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1980001683A1 (en) * | 1979-02-09 | 1980-08-21 | Maruzen Petrochem Co Ltd | Process for producing high-density,high-strength carbon and graphite material |
| CN102502603A (en) * | 2011-11-01 | 2012-06-20 | 雅安恒圣高纯石墨科技有限责任公司 | Production process of large isotropic and isostatic high purity graphite with fine particles |
| CN105668553A (en) * | 2015-12-31 | 2016-06-15 | 平顶山东方碳素股份有限公司 | Process of preparing high-strength carbon material from waste materials |
| CN107805070A (en) * | 2017-10-30 | 2018-03-16 | 大同新成新材料股份有限公司 | A kind of graphene carbon slide plate |
| CN107986786A (en) * | 2017-11-24 | 2018-05-04 | 大同新成新材料股份有限公司 | A kind of graphite product and production method |
| CN108585866A (en) * | 2018-06-06 | 2018-09-28 | 大同新成新材料股份有限公司 | A kind of subway slide plate carbon preparation method |
| 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 |
| CN112408985A (en) * | 2020-10-22 | 2021-02-26 | 中钢集团新型材料（浙江）有限公司 | Preparation method of high-performance fine isostatic pressing graphite |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634361A (en) * | 2022-03-02 | 2022-06-17 | 五星新材科技有限公司 | Preparation method of isotropic isostatic pressing graphite with fine structure |
| CN114956847A (en) * | 2022-05-09 | 2022-08-30 | 合肥工业大学 | Preparation method of needle coke reinforced pure carbon pantograph carbon slide plate |
| CN114956847B (en) * | 2022-05-09 | 2023-06-27 | 合肥工业大学 | Preparation method of needle coke enhanced pure carbon pantograph carbon slide plate |
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Application publication date: 20220114 |