CN108484195B - Preparation method of pantograph carbon slide plate - Google Patents
Preparation method of pantograph carbon slide plate Download PDFInfo
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- CN108484195B CN108484195B CN201810170552.5A CN201810170552A CN108484195B CN 108484195 B CN108484195 B CN 108484195B CN 201810170552 A CN201810170552 A CN 201810170552A CN 108484195 B CN108484195 B CN 108484195B
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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
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
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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
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/407—Copper
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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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
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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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B2235/5248—Carbon, e.g. graphite
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- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
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- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
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Abstract
The invention discloses a preparation method of a pantograph carbon slide plate, which comprises the following steps: and (3) putting the powdery raw materials into a stirrer according to a required proportion for stirring treatment, and uniformly mixing various dry powders. Mixing the dry powders, standing until the suspended dust falls, adding molten medium temperature asphalt into the mixed dry powders, and stirring to obtain kneaded material. And (3) conveying the kneaded material into a die, and then conveying the kneaded material into the die for hot pressing, wherein the kneaded material is made into a carbon sliding plate primary blank in the die. And (3) feeding the carbon slide plate primary blank into a roasting furnace, starting a heating device, and roasting to prepare the sintered carbon slide plate primary blank. And (4) sequentially dipping and drying the sintered carbon sliding plate primary blank to obtain a finished carbon sliding plate. The method of the invention can increase the decontamination effect to a certain extent and reduce the processing cost at the same time.
Description
Technical Field
The invention relates to the technical field of railway transportation, in particular to a preparation method of a carbon pantograph slider.
Background
With the development of high-speed rail industry in China, the research and development of the carbon pantograph slider also become one of the key research and development objects. The pantograph slide plate is the most important current collecting element in a locomotive power supply system, is arranged on a pantograph, is directly contacted with a contact net lead, and belongs to the category of sliding contact materials. The current on the power transmission network is guided and transmitted to a locomotive power supply system through the contact of the pantograph slide plate and the power transmission network line, so that the normal operation of the electric locomotive is maintained. Pantograph slide plates mainly have three main types: powder metallurgy slide, carbon slide, dip metal carbon slide. The carbon sliding plate is developed in developed industrial countries, the carbon sliding plate replaces a powder metallurgy sliding plate, the abrasion to the contact net lead is effectively reduced, and the service life of the lead is prolonged. The metal-impregnated carbon sliding plate is made by impregnating a carbon sliding plate with a copper alloy under hot isostatic pressing, has good electrical conductivity and impact toughness, and is high in strength and hardness, but has higher abrasion to a contact net wire than the carbon sliding plate. At present, the carbon slide plate is still the first choice material widely adopted by railway departments at home and abroad, and the carbon slide plate is made of carbon-graphite as a base material, has good electric conduction, heat conduction and wear-resisting self-lubricating property, and has the characteristics of good spark inhibition effect, no deformation at high temperature and small abrasion to a contact net wire. The service life of the carbon sliding plate processed at home at present can reach the first-class international level, but the processing raw materials adopted at present mainly comprise graphite, asphalt coke powder, coke powder and the like, a large amount of pollution dust can be generated in the processing and manufacturing process, the pollution treatment capacity is improved under the condition of ensuring the product quality, and meanwhile, the cost of the current processing method is still higher and needs to be improved.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a pantograph carbon slide plate, which can increase the decontamination effect to a certain extent and reduce the processing cost.
The technical scheme of the invention is as follows:
a preparation method of a pantograph carbon slide plate comprises the following steps:
s1, putting petroleum coke powder, asphalt coke powder, sulfur, coke powder, carbon fiber, silicon powder and copper powder which are powdery raw materials into a stirrer according to a required proportion for stirring treatment to uniformly mix the various dry powders, wherein the stirrer is in a closed state during the mixing process,
s2, mixing the dry powders, standing for 30min, adding molten medium-temperature asphalt into the mixed dry powders after the suspended dust falls, and continuously stirring to prepare kneaded materials;
s3, conveying the kneaded materials into a mold, then conveying the kneaded materials into the mold, performing hot pressing, wherein a fully-closed conveying belt is adopted, a plurality of air exhaust devices are arranged on the conveying belt, a VOC air filter is arranged on the outer side of the conveying belt, and the kneaded materials are manufactured into a carbon sliding plate primary blank in the mold after being conveyed;
s4, feeding the carbon slide plate primary blank into a roasting furnace, arranging an air supply mechanism on the roasting furnace, assisting the carbon slide plate primary blank to be cooled to 25 ℃ by slow natural air, then closing the air supply mechanism, starting a heating device, and carrying out roasting treatment to prepare a sintered carbon slide plate primary blank;
and S5, sequentially dipping and drying the sintered carbon sliding plate primary blank to obtain the finished carbon sliding plate.
Further, the powdery raw materials comprise the following components in parts by weight: petroleum coke powder, asphalt coke powder, sulfur, coke powder, carbon fiber, silicon powder and copper powder
35-40 parts of petroleum coke powder, 30 parts of asphalt coke powder, 1-1.5 parts of sulfur, 2.5 parts of coke powder, 10 parts of carbon fiber, 3-6 parts of silicon powder, 1.8-2.4 parts of copper powder and 32-38 parts of medium temperature asphalt.
Further, in step S1, the step of adding copper powder and silicon powder is performed when the stirring has been performed halfway in the previous period.
Further, in step S3, the hot pressing temperature is 380 ℃, the pressure is 25MPa, and the pressure is maintained for 20 min.
Further, in step S4, during the sintering process in the sintering furnace, since the temperature is high, if the generated pollution gas is directly sent to the waste gas treatment device, the device may be damaged, and a section of spiral cooling gas section needs to be arranged at the gas outlet to allow the waste gas to be cooled to a certain extent, and then sent to the waste gas treatment device.
Further, in step S5, the step of performing impregnation includes: heating to 140-160 ℃ in a reduced pressure distillation kettle, keeping the temperature for 15min, vacuumizing to 0.1MPa, maintaining the pressure for 1h, recovering the pressure, and drying by adopting hot air at 40 ℃ to obtain the finished carbon sliding plate.
The softening point temperature of the impregnation is 100-105 ℃.
Furthermore, after 10 times of impregnation, dense-mesh filtration is performed to filter solid-phase substances for recycling, wherein the mesh size is 40 meshes.
The invention has the beneficial effects that:
1. in each processing step of the invention, the conveying and processing are carried out in a sealed state, dust and waste gas are not leaked in the whole process, and the pollution prevention effect can be effectively improved by the waste gas treatment in the process.
2. By adjusting the formula ratio, the heavily-polluted raw materials such as boron nitride and the like adopted in the existing preparation process are eliminated, the requirements on electrical conductivity and structural strength can be met through the matching of other materials, meanwhile, part of the raw materials can be recycled, the temperature and the pressure can be adjusted on the existing basis, the energy consumption is reduced under the condition that the product effect is not influenced, and the requirement on saving the cost is met.
Detailed Description
The present invention will be further described with reference to the following examples.
A preparation method of a pantograph carbon slide plate comprises the following steps:
s1, placing petroleum coke powder, asphalt coke powder, sulfur, coke powder and carbon fiber which are powdery raw materials into a stirrer according to a required proportion for stirring treatment, uniformly mixing various dry powders, adding silicon powder and copper powder when the dry powders are stirred to a half, wherein the stirrer is in a closed state in the mixing process, and the powdery raw materials are prepared from the following components in parts by weight: 35-40 parts of petroleum coke powder, 30 parts of asphalt coke powder, 1-1.5 parts of sulfur, 2.5 parts of coke powder, 10 parts of carbon fiber, 3-6 parts of silicon powder, 1.8-2.4 parts of copper powder and 32-38 parts of medium-temperature asphalt, wherein the used powder is 60 meshes, and the particle size of the silicon powder is 800 meshes; the step of adding copper powder and silicon powder is carried out when the stirring is carried out to half in the previous period;
s2, mixing the dry powders, standing for 30min, adding molten medium-temperature asphalt into the mixed dry powders after the suspended dust falls, and continuously stirring to prepare kneaded materials;
s3, conveying the kneaded materials into a mold, carrying out hot pressing in the process of conveying the kneaded materials into the mold, keeping the hot pressing temperature at 380 ℃ and the pressure at 25MPa for 20min, wherein a fully-closed conveying belt is adopted, a plurality of air exhaust devices are arranged on the conveying belt, a VOC air filter is arranged on the outer side of the conveying belt, and the kneaded materials are manufactured into a carbon slide plate primary blank in the mold after being conveyed;
s4, feeding the carbon slide plate primary blank into a roasting furnace, arranging an air supply mechanism on the roasting furnace, assisting the carbon slide plate primary blank to be cooled to 25 ℃ by slow natural air, then closing the air supply mechanism, starting a heating device, and carrying out roasting treatment to prepare a sintered carbon slide plate primary blank; in the sintering process of the sintering furnace, due to high temperature, if the generated pollution gas is directly sent into a waste gas treatment device, the device can be damaged, a section of spiral cooling gas section needs to be arranged at a gas outlet, so that the waste gas can be cooled to a certain extent, and then the waste gas is sent into a waste gas processor;
s5, sequentially dipping and drying the sintered carbon sliding plate primary blank to obtain a finished carbon sliding plate, wherein the dipping step is as follows: heating to 140-160 ℃ in a reduced pressure distillation kettle, keeping the temperature for 15min, vacuumizing to 0.1MPa, maintaining the pressure for 1h, recovering the pressure, and drying by adopting hot air at 40 ℃ to obtain the finished carbon sliding plate.
After 10 times of soaking, the soaking solution is subjected to dense-net filtration with a mesh of 40 meshes, solid-phase substances are filtered and recycled, and if substances with large particle sizes appear in the recycled product, the product is subjected to secondary crushing to form a powdery structure.
The finished carbon sliding plate prepared by the method has the resistivity of 38-39 mu omega, and the density of 1.75g/cm3The bending strength is 30-35MPa, the compression strength is 48-55MPa, the hardness is 57.5HRC, and the abrasion degree is 3.8mm per ten thousand kilometers. Compared with other existing carbon sliding plates, the performance of the carbon sliding plate can meet the requirement.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A preparation method of a pantograph carbon slide plate is characterized by comprising the following steps:
s1, putting petroleum coke powder, asphalt coke powder, sulfur, coke powder, carbon fiber, silicon powder and copper powder which are powdery raw materials into a stirrer according to a required proportion for stirring treatment to uniformly mix the various dry powders, wherein the stirrer is in a closed state during the mixing process,
s2, mixing the dry powders, standing for 30min, adding molten medium-temperature asphalt into the mixed dry powders after the suspended dust falls, and continuously stirring to prepare kneaded materials;
s3, conveying the kneaded materials into a mold, then conveying the kneaded materials into the mold, performing hot pressing, wherein a fully-closed conveying belt is adopted, a plurality of air exhaust devices are arranged on the conveying belt, a VOC air filter is arranged on the outer side of the conveying belt, and the kneaded materials are manufactured into a carbon sliding plate primary blank in the mold after being conveyed;
s4, feeding the carbon slide plate primary blank into a roasting furnace, arranging an air supply mechanism on the roasting furnace, assisting the carbon slide plate primary blank to be cooled to 25 ℃ by slow natural air, then closing the air supply mechanism, starting a heating device, and carrying out roasting treatment to prepare a sintered carbon slide plate primary blank;
and S5, sequentially dipping and drying the sintered carbon sliding plate primary blank to obtain the finished carbon sliding plate.
2. The preparation method of the pantograph carbon slide plate according to claim 1, wherein the powdery raw materials comprise the following components in parts by weight:
35-40 parts of petroleum coke powder, 30 parts of asphalt coke powder, 1-1.5 parts of sulfur, 2.5 parts of coke powder, 10 parts of carbon fiber, 3-6 parts of silicon powder, 1.8-2.4 parts of copper powder and 32-38 parts of medium temperature asphalt.
3. The process for preparing a pantograph carbon slide plate according to claim 2, wherein in the step S1, the step of adding the copper powder and the silicon powder is performed when the stirring is performed to half in the previous stage.
4. The method for preparing a pantograph carbon slide plate according to claim 1, wherein in step S3, the hot pressing temperature is 380 ℃, the pressure is 25MPa, and the pressure is maintained for 20 min.
5. The method for preparing a pantograph carbon slide plate according to claim 1, wherein in step S4, during the sintering process in the sintering furnace, due to the high temperature, the generated pollution gas may damage the waste gas treatment device if being directly fed into the waste gas treatment device, and a spiral cooling gas section is required to be arranged at the gas outlet so that the waste gas can be cooled to a certain extent and then fed into the waste gas treatment device.
6. The method for preparing a pantograph carbon slide plate according to claim 1, wherein in the step S5, the step of dipping is: heating to 140-160 ℃ in a reduced pressure distillation kettle, keeping the temperature for 15min, vacuumizing to 0.1MPa, maintaining the pressure for 1h, recovering the pressure, and drying by adopting hot air at 40 ℃ to obtain the finished carbon sliding plate, wherein the softening point temperature of impregnation is 100-105 ℃.
7. The method for preparing a pantograph carbon slide plate according to claim 6, wherein after each 10 times of dipping, the dipping solution is subjected to dense-mesh filtration with a mesh size of 40 meshes, and solid-phase substances are filtered and recycled.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001010862A (en) * | 1999-05-24 | 2001-01-16 | Mrcc Inc | Vitreous carbon composite, its process and usage thereof |
| EP1041056B1 (en) * | 1999-03-30 | 2005-02-23 | Railway Technical Research Institute | Titanium- and copper-containing carbon composite material and process for the production thereof |
| JP2008144189A (en) * | 2006-12-06 | 2008-06-26 | Railway Technical Res Inst | Carbon-based contacting plate |
| JP5456995B2 (en) * | 2008-07-11 | 2014-04-02 | 公益財団法人鉄道総合技術研究所 | Pantograph current collecting material |
| CN106146019A (en) * | 2015-04-21 | 2016-11-23 | 苏州东南电碳科技有限公司 | A kind of preparation method of fibre reinforced pantograph carbon slide carbon bar |
| CN107021772A (en) * | 2017-04-17 | 2017-08-08 | 武汉理工大学 | A kind of preparation method of fibre reinforced pantograph carbon slide |
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2018
- 2018-03-01 CN CN201810170552.5A patent/CN108484195B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1041056B1 (en) * | 1999-03-30 | 2005-02-23 | Railway Technical Research Institute | Titanium- and copper-containing carbon composite material and process for the production thereof |
| JP2001010862A (en) * | 1999-05-24 | 2001-01-16 | Mrcc Inc | Vitreous carbon composite, its process and usage thereof |
| JP2008144189A (en) * | 2006-12-06 | 2008-06-26 | Railway Technical Res Inst | Carbon-based contacting plate |
| JP5456995B2 (en) * | 2008-07-11 | 2014-04-02 | 公益財団法人鉄道総合技術研究所 | Pantograph current collecting material |
| CN106146019A (en) * | 2015-04-21 | 2016-11-23 | 苏州东南电碳科技有限公司 | A kind of preparation method of fibre reinforced pantograph carbon slide carbon bar |
| CN107021772A (en) * | 2017-04-17 | 2017-08-08 | 武汉理工大学 | A kind of preparation method of fibre reinforced pantograph carbon slide |
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