CN116045677A - Vacuum high-temperature continuous graphitizing furnace and use method thereof - Google Patents
Vacuum high-temperature continuous graphitizing furnace and use method thereof Download PDFInfo
- Publication number
- CN116045677A CN116045677A CN202310069811.6A CN202310069811A CN116045677A CN 116045677 A CN116045677 A CN 116045677A CN 202310069811 A CN202310069811 A CN 202310069811A CN 116045677 A CN116045677 A CN 116045677A
- Authority
- CN
- China
- Prior art keywords
- chamber
- vacuum
- cooling chamber
- graphite
- sealing valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000001816 cooling Methods 0.000 claims abstract description 98
- 239000010439 graphite Substances 0.000 claims abstract description 73
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 239000007789 gas Substances 0.000 claims abstract description 38
- 238000007599 discharging Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 239000012535 impurity Substances 0.000 claims abstract description 21
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 50
- 230000006698 induction Effects 0.000 claims description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 23
- 229910052802 copper Inorganic materials 0.000 claims description 23
- 239000010949 copper Substances 0.000 claims description 23
- 238000005087 graphitization Methods 0.000 claims description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000007770 graphite material Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 13
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920006350 polyacrylonitrile resin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 229910021654 trace metal Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/06—Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Power Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The utility model discloses a vacuum high-temperature continuous graphitizing furnace and a use method thereof, relating to the technical field of graphitizing furnaces, wherein a furnace body comprises a feeding chamber, a vacuum heating chamber, a cooling chamber and a discharging chamber which are sequentially communicated; the feeding chamber and the discharging chamber are respectively provided with a vacuumizing mechanism; the cooling chamber is also provided with an exhaust gas adsorption mechanism for adsorbing impurity volatile gases in the graphite raw materials and a vacuum pump set for vacuumizing the cooling chamber and the vacuum heating chamber; according to the utility model, the vacuum pump set is arranged to realize a vacuum environment in the vacuum heating chamber, and in the vacuum environment, graphite powder can be directly heated by radiation without utilizing gas for heat transfer, so that the temperature in the vacuum heating chamber is more stable; simultaneously in vacuum environment, the impurity in the graphite powder volatilizees more easily, can promote purification quality, and impurity gas is in time adsorbed by exhaust gas adsorption mechanism and is handled, avoids impurity gas to gather and then condense at the inner wall in the furnace body inside for purification process can last for a long time.
Description
Technical Field
The utility model relates to the technical field of graphitization furnaces, in particular to a vacuum high-temperature continuous graphitization furnace and a use method thereof.
Background
Graphite materials, such as graphite powder and graphite film, have gained increased attention due to their unique electrical and thermal properties. During processing, it is often necessary to remove tars from raw materials such as pitch, polyacrylonitrile and phenolic resins by a low temperature carbonization process, followed by graphitization at an elevated temperature. The high-temperature graphitization of carbon powder or the high-temperature purification of graphite powder is realized mainly by heat treatment of a high-temperature graphitization furnace at the high temperature of 2000-3000 ℃ of a release valve, and the key equipment is the high-temperature graphitization furnace.
The prior high-temperature graphitizing equipment is mainly an Acheson graphitizing furnace, which is a graphitizing furnace filled with filler coke around a carbide, indirectly electrified and heated by utilizing the resistance of the coke, and finally, the heated object generates resistance heating. Because the Acheson graphitizing furnace needs to heat a large amount of filler coke, the electric power unit consumption is high; and the Acheson furnace has large temperature difference in each part of the furnace due to more charging at one time, so that the quality stability of the product is poor. The period from heating to heat preservation to cooling of each furnace is longer, and the production preparation efficiency is low. And for example, a traditional vertical graphitizing furnace adopts an intermittent working mode. The furnace burden can be put once every time, each furnace is heated, kept warm and cooled to be opened, the production efficiency is low, the yield is low, the energy consumption is high, and the furnace burden is mainly suitable for experimental production and is not suitable for continuous industrial production.
In order to solve the problem of continuous production of the graphitization furnace, the utility model patent with the application number of 200920307095.6 and the application number of 201310502840.3 and the utility model patent with the application number of carbonized graphitization continuous high temperature furnace and using method disclose graphitization furnaces capable of continuous production. However, the temperature in the furnace is unstable, the purification quality of the graphite raw material is low, and the volatilized impurity air is easy to condense on the furnace wall, so that the continuous operation of the purification process is affected.
Disclosure of Invention
The utility model aims to provide a vacuum high-temperature continuous graphitization furnace and a use method thereof, which are used for solving the problems existing in the prior art and can obviously improve the purification precision and the production efficiency of graphite powder raw materials.
In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a vacuum high-temperature continuous graphitizing furnace, which comprises a furnace body and a conveying mechanism, wherein the conveying mechanism is arranged in the furnace body and is used for conveying graphite raw materials, and the furnace body comprises a feeding chamber, a vacuum heating chamber, a cooling chamber and a discharging chamber which are sequentially communicated along the conveying direction of the graphite raw materials; the vacuum-pumping mechanism is arranged in the feeding chamber and the discharging chamber, wherein a first sealing valve is arranged at the feeding port of the feeding chamber, the discharging port is connected with the inlet of the vacuum heating chamber through a second sealing valve, the feeding port of the discharging chamber is connected with the outlet of the cooling chamber through a third sealing valve, and a fourth sealing valve is arranged at the discharging port; and the cooling chamber is also provided with an exhaust gas adsorption mechanism for adsorbing impurity volatile gas in the graphite raw material and a vacuum pump set for vacuumizing the cooling chamber and the vacuum heating chamber.
Preferably, the vacuum heating chamber comprises a cylindrical shell, wherein a graphite pipe is arranged in the cylindrical shell, and an axial cavity of the graphite pipe forms a transportation channel for transporting a graphite raw material container; along the axial of graphite tube, the outside interval of graphite tube is provided with a plurality of groups of induction coil, and a plurality of induction coil corresponds the position temperature of graphite tube rises gradually.
Preferably, a silicon steel sheet is disposed in a space between adjacent induction coils.
Preferably, the induction coil is a copper pipe induction coil, and circulating cooling water is introduced into the copper pipe induction coil.
Preferably, an insulating layer is further arranged on the inner wall of the induction coil.
Preferably, the cooling chamber comprises a first water cooling chamber, a second water cooling chamber, a third water cooling chamber and a fourth water cooling chamber which are sequentially communicated and are of a circular double-layer water cooling structure, the first water cooling chamber is communicated with the vacuum heating chamber, and a cylindrical carbon tube is arranged on the inner wall of the first water cooling chamber; the bottom of the inner wall of the second water cooling chamber is provided with a U-shaped graphite tube which is connected with the cylindrical carbon tube in a flush way, and the bottom of the inner wall of the third water cooling chamber is provided with a stainless steel polishing plate which is connected with the U-shaped graphite tube in a flush way; the inner wall of the fourth water cooling chamber is connected with the stainless steel polishing plate in a parallel mode.
Preferably, a second observation window is arranged in the middle of the outer wall of the second water cooling chamber, and an oxygen content measuring instrument is arranged at the top of the outer wall; and a third observation window and a fourth observation window are respectively arranged in the middle of the outer wall of the third water cooling chamber and the fourth water cooling chamber.
Preferably, the exhaust gas adsorption mechanism comprises a fin radiator arranged between the vacuum pump group and the cooling chamber; the vacuum pump set comprises a Roots pump and a slide valve pump which are connected, wherein the fin radiator is arranged between the air inlet of the Roots pump and the cooling chamber, the air outlet of the Roots pump is communicated with the air inlet of the slide valve pump, and the air outlet of the slide valve pump is provided with a gas purifying mechanism.
Preferably, the gas purifying mechanism comprises a precise filter cloth and a filter screen which are arranged at the gas outlet of the slide valve pump; preferably, the first sealing valve, the second sealing valve, the third sealing valve and the fourth sealing valve are gate valves, and the feeding chamber and the discharging chamber are further provided with air release valves.
The utility model also discloses a use method of the vacuum high-temperature continuous graphitization furnace, which comprises the following steps:
opening a gas release valve on the feeding chamber, allowing the discharged air to enter the feeding chamber to balance with the external atmospheric pressure, opening a first sealing valve, putting the container into a container containing graphite raw materials, and closing the first sealing valve;
the vacuum pumping mechanism vacuumizes the feeding chamber to ensure that the internal pressure is less than 0.01bar, opens the second sealing valve, sends the container into the vacuum heating chamber through the air cylinder, and closes the second sealing valve;
after the container enters the vacuum heating chamber, the hydraulic cylinder pushes the container onto a graphite boat, the graphite boat advances for a set distance every set time, impurities in the graphite raw material are gasified, condensed after contacting the fins under the suction effect of the Roots pump, and uncondensed gas is discharged out of the furnace body after being purified by the gas purifying mechanism;
vacuum heating graphite material and cooling in cooling chamber;
and vacuumizing the discharging chamber by using a vacuumizing mechanism, opening a third sealing valve after the internal pressure of the discharging chamber is less than 0.01bar, conveying the container into the cooling chamber through the air cylinder, closing the third sealing valve, opening a deflation valve on the cooling chamber, allowing the air to enter the cooling chamber to balance with the external atmospheric pressure, opening a fourth sealing valve, and discharging.
Compared with the prior art, the utility model has the following technical effects:
1. according to the utility model, the vacuum pump set is arranged to realize a vacuum environment in the vacuum heating chamber, and in the vacuum environment, graphite powder can be directly heated by radiation without utilizing gas for heat transfer, so that the temperature in the vacuum heating chamber is more stable;
2. in a vacuum environment, impurities in the graphite powder are easier to volatilize, so that the purification quality can be improved; simultaneously, volatilized impurity gas is adsorbed and treated in time by an exhaust gas adsorption mechanism, so that the impurity gas is prevented from being gathered in the furnace body and then condensed on the inner wall, and the excellent vacuum heating environment in the furnace body is maintained, so that the purification process can be continuously carried out for a long time;
3. according to the utility model, through arranging four cooling chambers, the graphite crucible and graphite powder raw materials can be cooled in time, so that the cooling time is obviously shortened, the purification process can be continuously carried out, and the working efficiency is higher;
4. according to the utility model, the first sealing valve, the second sealing valve, the third sealing valve and the fourth sealing valve are arranged, so that the feeding chamber and the discharging chamber can reach a vacuum state, and the vacuum state of the vacuum heating chamber is always kept.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a vacuum high-temperature continuous graphitizing furnace according to the present utility model;
wherein, 1, a feeding chamber; 2. a vacuum heating chamber; 3. a cooling chamber; 4. a discharge chamber; 5. a first sealing valve; 6. a second sealing valve; 7. a third sealing valve; 8. a fourth sealing valve; 9. a graphite crucible; 10. a cylindrical housing; 11. a graphite tube; 12. a copper induction coil; 13. a quartz window; 14. a vacuum pump set.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a vacuum high-temperature continuous graphitization furnace and a use method thereof, which are used for solving the problems existing in the prior art and can obviously improve the purification precision and the production efficiency of graphite powder raw materials.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Example 1:
as shown in fig. 1, the embodiment provides a vacuum high-temperature continuous graphitizing furnace, which comprises a furnace body and a conveying mechanism arranged in the furnace body and used for conveying graphite raw materials, wherein the furnace body comprises a feeding chamber 1, a vacuum heating chamber 2, a cooling chamber 3 and a discharging chamber 4 which are sequentially communicated along the conveying direction of the graphite raw materials; the vacuum-pumping mechanisms are arranged in the feeding chamber 1 and the discharging chamber 4, wherein a first sealing valve 5 is arranged at the feeding port of the feeding chamber 1, the discharging port is connected with the inlet of the vacuum heating chamber 2 through a second sealing valve 6, the feeding port of the discharging chamber 4 is connected with the outlet of the cooling chamber 3 through a third sealing valve 7, and a fourth sealing valve 8 is arranged at the discharging port; the cooling chamber 3 is also provided with an exhaust gas adsorption mechanism for adsorbing impurity volatile gases in the graphite raw material and a vacuum pump set 14 for vacuumizing the cooling chamber 3 and the vacuum heating chamber 2. The first sealing valve 5, the second sealing valve 6, the third sealing valve 7 and the fourth sealing valve 8 are gate valves, and the feeding chamber 1 and the discharging chamber 4 are also provided with air release valves.
When the vacuum pump set 14 is used, the vacuum heating chamber 2 and the cooling chamber 3 are vacuumized, graphite powder is contained in the graphite crucible 9, the first sealing valve 5 is firstly opened to convey the graphite crucible 9 into the feeding chamber 1, then the feeding chamber 1 is vacuumized by utilizing the vacuumizing mechanism, the second sealing valve 6 is further opened to convey the graphite crucible 9 into the vacuum heating chamber 2, the graphite crucible 9 is gradually pushed forward under the action of the conveying mechanism, and impurities in the graphite powder are gasified under the action of high temperature and are adsorbed by the waste gas adsorption mechanism; after the graphite crucible 9 enters the cooling chamber 3, the graphite powder raw material and the graphite crucible 9 are gradually cooled; the discharging chamber 4 is vacuumized in advance, the third sealing valve 7 is opened, after the graphite crucible 9 enters the discharging chamber 4, the third sealing valve 7 is closed, the air release valve on the discharging chamber 4 is opened, the outside air enters the discharging chamber 4 to balance the air pressure inside and outside the discharging chamber 4, and finally the fourth sealing valve 8 is opened to obtain the purified graphite powder raw material.
According to the embodiment, the vacuum pump set 14 is arranged, so that a vacuum environment can be realized in the vacuum heating chamber 2, graphite powder can be directly heated through radiation in the vacuum environment, heat transfer can not be performed by utilizing gas, and the temperature in the vacuum heating chamber 2 is more stable; meanwhile, impurities in the graphite are usually silicate minerals and trace metal oxides (silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, gasified metal iron oxide, nickel oxide and the like), the melting point of the impurities is mainly about 2000 ℃, the heating temperature of the vacuum heating chamber 2 can reach 3000 ℃, and in a vacuum environment, the impurities are more easily volatilized, so that the purification quality can be improved; the volatilized impurity gas is timely adsorbed by the waste gas adsorption mechanism, so that the impurity gas is prevented from being gathered in the furnace body and then condensed on the inner wall, and the excellent vacuum heating environment in the furnace body is maintained, so that the purification process can be continuously performed for a long time.
Meanwhile, the first sealing valve 5, the second sealing valve 6, the third sealing valve 7 and the fourth sealing valve 8 are arranged in the embodiment, so that the feeding chamber 1 and the discharging chamber 4 can reach a vacuum state, and the vacuum state of the vacuum heating chamber 2 is always kept.
Specifically, in this embodiment, the vacuum heating chamber 2 includes a cylindrical casing 10, where the cylindrical casing 10 is mainly made of double-layer stainless steel with a thickness of 16mm, and has a length of 5 meters and an inner diameter of 2.1 meters, two ends of the cylindrical casing 10 are welded by stainless steel flanges, and cooling water can be introduced into the middle of the interlayer. The flange of the butt-joint cylindrical shell 10 is provided with two large-head arched furnace doors which are connected by bolts, the large-head arched furnace doors are formed by welding double-layer stainless steel horn mouth end sockets, a large flange plate and a small flange plate, and the large flange plate is connected with the flange plate of the cylindrical shell 10 by high-strength bolts during assembly. The small flange of the end socket is connected with the feeding hydraulic propulsion system by high-strength bolts. The butt joint of the flange plates is provided with a sealing groove, the specification of the sealing groove is 15.5mm wide and 10mm deep, and a silicon rubber sealing ring with the diameter of 16mm is placed for sealing. After the vacuum sealing device is used, the vacuum sealing device can be disassembled for maintenance, and the whole structure can keep the vacuum state for a long time without leakage.
The cylindrical casing 10 is provided with a plurality of graphite tubes 11, each graphite tube 11 having an outer diameter of 500mm and an inner diameter of 450mm and 1.25 m. The axial cavity of the graphite tube 11 forms a transportation channel for transporting the graphite raw material container; along the axial direction of the graphite tube 11, a plurality of groups of induction coils are arranged outside the graphite tube 11 at intervals, the induction coils are hollow copper tube induction coils, the copper induction coils 12 are formed by winding hollow thick-wall copper tubes, the wall thickness of the copper tubes is 4mm, and cooling water is communicated in the copper tubes during operation. Each group of copper induction coils 12 is supported by 6 vertically arranged stainless steel lead screws and 1U-shaped stainless steel cross beam with adjustable height, and the copper induction coils 12 and the stainless steel cross beams are insulated by resin or alumina ceramics. The induction heating output power of the copper induction coil 12 is measured by an infrared thermometer and then transmitted to a meter (island power FP 23) with receiving and analyzing capability, and the meter outputs 4mA-20mA current according to set process parameters to control the output power of the intermediate frequency power supply after analysis. The copper pipe induction coil is provided with 4 groups, and the infrared temperature measurement system is also provided with 4 groups. The temperature of the first section is 1500 ℃, the common temperature of the second section is 2200 ℃, and the common temperature of the third section and the fourth section is 2900 ℃ to 3000 ℃. The heating body is a graphite tube 11 and a graphite crucible 9 which are used for receiving an alternating current magnetic field output by a copper tube induction coil. The cylindrical shell 10 is provided with 4 groups of 12 first observation windows with the diameter of 150mm at the side, wherein 1 of the three first observation windows in each group is used for measuring temperature, 1 is used for illumination, and 1 is used for observation.
In order to avoid electromagnetic interference, the gap between the adjacent copper pipe induction coils is 250mm, and a silicon steel sheet is additionally arranged between the gaps.
The inner wall of the copper pipe induction coil is also provided with an insulating layer, the insulating layer mainly comprises a high-purity graphite hard felt, the graphite hard felt is processed into a rear cylinder, and the specification is as follows: the copper induction coil 12 is directly assembled to the inner wall of the copper induction coil 12 through 800mm of outer diameter, 500mm of inner diameter and 1.25m of length, and the copper induction coil 12 is uniformly smeared with mineral mud after being wound and protected by high-temperature-resistant insulating ceramic fiber cloth, so that the purposes of insulating and protecting the copper induction coil 12 are achieved.
The cooling chamber 3 comprises a first water cooling chamber, a second water cooling chamber, a third water cooling chamber and a fourth water cooling chamber which are sequentially communicated and are of round double-layer water cooling structures, wherein the length of the first water cooling chamber is 1m, and the length of the second water cooling chamber, the length of the third water cooling chamber and the length of the fourth water cooling chamber are 3 m. The first water cooling chamber is communicated with the vacuum heating chamber 2, and the inner wall is provided with a cylindrical carbon tube with the thickness of 25mm and is connected with a graphite tube 11 in the vacuum heating chamber 2 in a flush way; the graphite crucible 9 which just passes through the vacuum heating chamber 2 is high in temperature, and is in direct contact with the bottom of the first water cooling chamber, so that the first water cooling chamber is easily damaged, and the cylindrical carbon tube can well protect the inner wall of the first water cooling chamber. After cooling in the first water cooling chamber, the temperature of the graphite crucible 9 and the graphite powder raw material is typically lowered to below 2000 ℃. The bottom of the inner wall of the second water cooling chamber is provided with a U-shaped graphite pipe 11 which is connected with the cylindrical carbon pipe in a parallel and level manner, the bottom of the inner wall of the third water cooling chamber is provided with a stainless steel polishing plate which is connected with the U-shaped graphite pipe 11 in a parallel and level manner, the U-shaped graphite pipe 11 and the stainless steel polishing plate have similar functions as the cylindrical carbon pipe and are both in protection function, after being cooled by the second water cooling chamber, the temperatures of the graphite crucible 9 and the graphite powder raw materials are generally reduced to below 700 ℃, and after being cooled by the third water cooling chamber, the temperatures of the graphite crucible 9 and the graphite powder raw materials are generally reduced to below 300 ℃; the inner wall of the fourth water cooling chamber is connected with the stainless steel polishing plate in a flush way, and after the fourth water cooling chamber is cooled, the temperature of the graphite crucible 9 and the graphite powder raw material is generally reduced to about 60 ℃.
According to the embodiment, through the arrangement of the four cooling chambers 3, the graphite crucible 9 and the graphite powder raw materials can be cooled in time, the cooling time is obviously shortened, the purification process can be continuously carried out, and the working efficiency is higher.
A second observation window is arranged in the middle of the outer wall of the second water cooling chamber, and an oxygen content measuring instrument is arranged at the top of the outer wall; the middle parts of the outer walls of the third water cooling chamber and the fourth water cooling chamber are respectively provided with a third observation window and a fourth observation window, and the outer wall of the fourth water cooling chamber is also provided with a window for illumination. The first observation window, the second observation window, the third observation window, the fourth observation window, and the illumination window are quartz windows 13.
The exhaust gas adsorption mechanism comprises a pure red copper extractable fin radiator arranged between the vacuum pump set 14 and the cooling chamber 3. The vacuum pump set 14 comprises a Roots pump and a slide valve pump which are connected, a fin radiator is arranged between the air inlet of the Roots pump and the cooling chamber 3, the air outlet of the Roots pump is communicated with the air inlet of the slide valve pump, and the air outlet of the slide valve pump is provided with a gas purifying mechanism. The high-temperature impurity waste gas is solidified into solid after passing through the low-temperature water fin radiator and is attached to the copper fin, so that the effect of capturing gasified waste gas is achieved. In order to further improve the waste gas treatment effect, a gas purifying mechanism is arranged on the exhaust port of the slide valve pump and comprises precise filter cloth and a filter screen.
In the embodiment, the side walls of the feeding chamber 1 and the discharging chamber 4 are made of stainless steel, and the pressure resistance is 0.2MPa.
Example 2:
the embodiment discloses a use method of a vacuum high-temperature continuous graphitization furnace, which comprises the following steps:
opening a release valve on the feeding chamber 1, allowing release air to enter the feeding chamber 1 to balance with the external atmospheric pressure, opening a first sealing valve 5, and closing the first sealing valve 5 after placing a container containing graphite raw materials;
the vacuum pumping mechanism vacuumizes the feeding chamber 1 to make the internal pressure less than 0.01bar, opens the second sealing valve 6, sends the container into the vacuum heating chamber 2 through the cylinder, and closes the second sealing valve 6; feeding the materials once every 20 min;
the container enters the vacuum heating chamber 2 and then touches the first travel switch, the hydraulic cylinder pushes the container onto the graphite boat, then the hydraulic cylinder retreats, the graphite boat advances for 500mm every 15min, impurities in the graphite raw material are gasified, condensed after contacting the fin radiator under the suction effect of the Roots pump, and uncondensed gas is discharged out of the furnace body after being purified by the gas purifying mechanism;
the graphite raw material is heated in vacuum and then enters a cooling chamber 3 for cooling;
the vacuum pumping mechanism vacuumizes the discharging chamber 4 in advance, after the internal pressure of the discharging chamber is smaller than 0.01bar, the graphite crucible 9 touches the second travel switch after passing through the cooling chamber 3, the third sealing valve 7 is opened, the container is sent into the cooling chamber 3 through the air cylinder, the third sealing valve 7 is closed, the air release valve on the cooling chamber 3 is opened, the air release enters the cooling chamber 3 to balance with the external atmospheric pressure, the fourth sealing valve 8 is opened, and the discharging is performed.
The adaptation to the actual need is within the scope of the utility model.
It should be noted that it will be apparent to those skilled in the art that the present utility model is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The vacuum high-temperature continuous graphitizing furnace is characterized by comprising a furnace body and a conveying mechanism which is arranged in the furnace body and is used for conveying graphite raw materials, wherein the furnace body comprises a feeding chamber, a vacuum heating chamber, a cooling chamber and a discharging chamber which are sequentially communicated along the conveying direction of the graphite raw materials; the vacuum-pumping mechanism is arranged in the feeding chamber and the discharging chamber, wherein a first sealing valve is arranged at the feeding port of the feeding chamber, the discharging port is connected with the inlet of the vacuum heating chamber through a second sealing valve, the feeding port of the discharging chamber is connected with the outlet of the cooling chamber through a third sealing valve, and a fourth sealing valve is arranged at the discharging port; and the cooling chamber is also provided with an exhaust gas adsorption mechanism for adsorbing impurity volatile gas in the graphite raw material and a vacuum pump set for vacuumizing the cooling chamber and the vacuum heating chamber.
2. The vacuum high temperature continuous graphitization furnace of claim 1, wherein the vacuum heating chamber comprises a cylindrical housing having a graphite tube disposed therein, an axial cavity of the graphite tube forming a transport channel for transport of a graphite raw material container; along the axial of graphite tube, the outside interval of graphite tube is provided with a plurality of groups of induction coil, and a plurality of induction coil corresponds the position temperature of graphite tube rises gradually.
3. The vacuum high temperature continuous graphitization furnace according to claim 2, wherein a silicon steel sheet is provided in a space between adjacent ones of the induction coils.
4. The vacuum high-temperature continuous graphitizing furnace according to claim 3, wherein the induction coil is a copper tube induction coil, and circulating cooling water is introduced into the copper tube induction coil.
5. The vacuum high-temperature continuous graphitization furnace according to claim 2, wherein an insulation layer is further provided on an inner wall of the induction coil.
6. The vacuum high-temperature continuous graphitization furnace according to any one of claims 1 to 5, wherein the cooling chamber comprises a first water cooling chamber, a second water cooling chamber, a third water cooling chamber and a fourth water cooling chamber which are sequentially communicated and are all of a circular double-layer water cooling structure, the first water cooling chamber is communicated with the vacuum heating chamber, and a cylindrical carbon tube is arranged on the inner wall; the bottom of the inner wall of the second water cooling chamber is provided with a U-shaped graphite tube which is connected with the cylindrical carbon tube in a flush way, and the bottom of the inner wall of the third water cooling chamber is provided with a stainless steel polishing plate which is connected with the U-shaped graphite tube in a flush way; the inner wall of the fourth water cooling chamber is connected with the stainless steel polishing plate in a parallel mode.
7. The vacuum high-temperature continuous graphitizing furnace according to claim 6, wherein a second observation window is arranged in the middle of the outer wall of the second water cooling chamber, and an oxygen content measuring instrument is arranged at the top of the outer wall; and a third observation window and a fourth observation window are respectively arranged in the middle of the outer wall of the third water cooling chamber and the fourth water cooling chamber.
8. The vacuum high temperature continuous graphitization furnace of claim 6, wherein the exhaust gas adsorption mechanism comprises a fin radiator disposed between the vacuum pump stack and the cooling chamber; the vacuum pump set comprises a Roots pump and a slide valve pump which are connected, wherein the fin radiator is arranged between the air inlet of the Roots pump and the cooling chamber, the air outlet of the Roots pump is communicated with the air inlet of the slide valve pump, and the air outlet of the slide valve pump is provided with a gas purifying mechanism.
9. The vacuum high temperature continuous graphitization furnace of claim 8, wherein the gas purifying mechanism comprises a precision filter cloth and a filter screen provided at the gas outlet of the slide valve pump; preferably, the first sealing valve, the second sealing valve, the third sealing valve and the fourth sealing valve are gate valves, and the feeding chamber and the discharging chamber are further provided with air release valves.
10. The application method of the vacuum high-temperature continuous graphitization furnace is characterized by comprising the following steps of:
opening a gas release valve on the feeding chamber, allowing the discharged air to enter the feeding chamber to balance with the external atmospheric pressure, opening a first sealing valve, putting the container into a container containing graphite raw materials, and closing the first sealing valve;
the vacuum pumping mechanism vacuumizes the feeding chamber to ensure that the internal pressure is less than 0.01bar, opens the second sealing valve, sends the container into the vacuum heating chamber through the air cylinder, and closes the second sealing valve;
after the container enters the vacuum heating chamber, the hydraulic cylinder pushes the container onto a graphite boat, the graphite boat advances for a set distance every set time, impurities in the graphite raw material are gasified, condensed after contacting the fins under the suction effect of the Roots pump, and uncondensed gas is discharged out of the furnace body after being purified by the gas purifying mechanism;
vacuum heating graphite material and cooling in cooling chamber;
and vacuumizing the discharging chamber by using a vacuumizing mechanism, opening a third sealing valve after the internal pressure of the discharging chamber is less than 0.01bar, conveying the container into the cooling chamber through the air cylinder, closing the third sealing valve, opening a deflation valve on the cooling chamber, allowing the air to enter the cooling chamber to balance with the external atmospheric pressure, opening a fourth sealing valve, and discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310069811.6A CN116045677A (en) | 2023-02-07 | 2023-02-07 | Vacuum high-temperature continuous graphitizing furnace and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310069811.6A CN116045677A (en) | 2023-02-07 | 2023-02-07 | Vacuum high-temperature continuous graphitizing furnace and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116045677A true CN116045677A (en) | 2023-05-02 |
Family
ID=86120288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310069811.6A Withdrawn CN116045677A (en) | 2023-02-07 | 2023-02-07 | Vacuum high-temperature continuous graphitizing furnace and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116045677A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031482A1 (en) * | 1998-11-23 | 2000-06-02 | Mawar Malaysian Limited | Improved apparatus and process for separating aluminium from a mixture of aluminium and aluminium dross |
| CN2690373Y (en) * | 2004-04-26 | 2005-04-06 | 朱兴发 | Vacuum high temperatare continuous micro crystal graphite purifting producing device |
| CN201497336U (en) * | 2009-07-30 | 2010-06-02 | 株洲红亚电热设备有限公司 | Horizontal type continuous high temperature graphitizing furnace |
| CN104555990A (en) * | 2013-10-22 | 2015-04-29 | 凯尔凯德新材料科技泰州有限公司 | Continuous high-temperature furnace for carbonization and graphitization and application method |
| KR20160121731A (en) * | 2015-04-10 | 2016-10-20 | 김부열 | Consecutive dry system for sludge having contained purification function of pollutant |
| CN208786378U (en) * | 2018-08-15 | 2019-04-26 | 北京中石伟业科技无锡有限公司 | A kind of graphitizing furnace protective gas recycling circulator |
| CN209161498U (en) * | 2018-09-20 | 2019-07-26 | 大冶市都鑫摩擦粉体有限公司 | A kind of superhigh temperature continous way graphite purifying device |
| CN210632944U (en) * | 2019-07-30 | 2020-05-29 | 上海富驰高科技股份有限公司 | Vacuum sintering waste gas treatment device for metal powder injection molding product |
| CN111228834A (en) * | 2020-02-17 | 2020-06-05 | 北京航空航天大学 | High-vacuum continuous graphite purification device and application thereof |
| CN113501527A (en) * | 2021-09-06 | 2021-10-15 | 北京壹金新能源科技有限公司 | Method for preparing silicon monoxide |
-
2023
- 2023-02-07 CN CN202310069811.6A patent/CN116045677A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031482A1 (en) * | 1998-11-23 | 2000-06-02 | Mawar Malaysian Limited | Improved apparatus and process for separating aluminium from a mixture of aluminium and aluminium dross |
| CN2690373Y (en) * | 2004-04-26 | 2005-04-06 | 朱兴发 | Vacuum high temperatare continuous micro crystal graphite purifting producing device |
| CN201497336U (en) * | 2009-07-30 | 2010-06-02 | 株洲红亚电热设备有限公司 | Horizontal type continuous high temperature graphitizing furnace |
| CN104555990A (en) * | 2013-10-22 | 2015-04-29 | 凯尔凯德新材料科技泰州有限公司 | Continuous high-temperature furnace for carbonization and graphitization and application method |
| KR20160121731A (en) * | 2015-04-10 | 2016-10-20 | 김부열 | Consecutive dry system for sludge having contained purification function of pollutant |
| CN208786378U (en) * | 2018-08-15 | 2019-04-26 | 北京中石伟业科技无锡有限公司 | A kind of graphitizing furnace protective gas recycling circulator |
| CN209161498U (en) * | 2018-09-20 | 2019-07-26 | 大冶市都鑫摩擦粉体有限公司 | A kind of superhigh temperature continous way graphite purifying device |
| CN210632944U (en) * | 2019-07-30 | 2020-05-29 | 上海富驰高科技股份有限公司 | Vacuum sintering waste gas treatment device for metal powder injection molding product |
| CN111228834A (en) * | 2020-02-17 | 2020-06-05 | 北京航空航天大学 | High-vacuum continuous graphite purification device and application thereof |
| CN113501527A (en) * | 2021-09-06 | 2021-10-15 | 北京壹金新能源科技有限公司 | Method for preparing silicon monoxide |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6898232B2 (en) | Induction furnace for high temperature operation | |
| JP6461329B2 (en) | Silicon oxide manufacturing apparatus and preparation method | |
| CN112050637A (en) | Energy-saving induction heating furnace | |
| CN111362262B (en) | High-purity graphitization furnace | |
| CN114993033A (en) | Vacuum ultrahigh-temperature sintering purification furnace and purification process | |
| CA2239670C (en) | Graphitizing electric furnace | |
| CN116428857A (en) | Vertical continuous graphitizing and purifying furnace | |
| RU110089U1 (en) | DEVICE FOR SILICTING PRODUCTS BY STEAM-LIQUID PHASE METHOD | |
| CN116045677A (en) | Vacuum high-temperature continuous graphitizing furnace and use method thereof | |
| CN117685778A (en) | Atmosphere protection high-temperature roller hearth furnace and use method thereof | |
| CN106283274B (en) | A kind of high temperature cabonization device for producing carbon fiber | |
| CN110538478B (en) | High-quality anhydrous rare earth halide purifying device | |
| CN110055621A (en) | A kind of superhigh temperature graphitizing furnace | |
| CN112050636A (en) | Induction heating furnace | |
| CN111595151A (en) | Carbonization furnace for carbonizing lithium ion battery negative electrode material | |
| CN105004178B (en) | External-heat vacuum heat tank | |
| CN204474332U (en) | The unsettled novel graphite stove of furnace bottom | |
| TWM454528U (en) | Graphite manufacturing apparatus | |
| CN114906845B (en) | Continuous carbonization and graphitization system for producing graphite felt | |
| CN105197914A (en) | System and process for high-temperature continuous gas purification and graphitization of carbon particle materials | |
| CN109210930A (en) | A kind of multicell horizontal vacuum furnace producing silicon monoxide and silicon monoxide preparation method | |
| CN205537094U (en) | Fill water cooling formula hydrogen sintering stove | |
| CN205023858U (en) | Continuous gas purification of carbon element granular material high temperature and graphitization system | |
| CN110530145B (en) | Kiln for producing vertical continuous lithium battery anode material and production process thereof | |
| CN209054929U (en) | A kind of multicell horizontal vacuum furnace producing silicon monoxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230502 |