CN115745609B - Continuous sintering process and sintering furnace for silicon-based anode material - Google Patents
Continuous sintering process and sintering furnace for silicon-based anode material Download PDFInfo
- Publication number
- CN115745609B CN115745609B CN202211179026.8A CN202211179026A CN115745609B CN 115745609 B CN115745609 B CN 115745609B CN 202211179026 A CN202211179026 A CN 202211179026A CN 115745609 B CN115745609 B CN 115745609B
- Authority
- CN
- China
- Prior art keywords
- crucible
- sintering furnace
- motor
- rotating mechanism
- silicon
- 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.)
- Active
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 91
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 33
- 239000010703 silicon Substances 0.000 title claims abstract description 33
- 239000010405 anode material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 25
- 230000008569 process Effects 0.000 title abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 71
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 19
- 239000010426 asphalt Substances 0.000 abstract description 18
- 239000011863 silicon-based powder Substances 0.000 abstract description 18
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 238000002156 mixing Methods 0.000 abstract description 15
- 238000003756 stirring Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000011068 loading method Methods 0.000 abstract description 5
- 238000005192 partition Methods 0.000 description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 239000010406 cathode material Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- IOCYQQQCJYMWDT-UHFFFAOYSA-N (3-ethyl-2-methoxyquinolin-6-yl)-(4-methoxycyclohexyl)methanone Chemical compound C=1C=C2N=C(OC)C(CC)=CC2=CC=1C(=O)C1CCC(OC)CC1 IOCYQQQCJYMWDT-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Silicon Compounds (AREA)
Abstract
The invention relates to a continuous sintering process and a sintering furnace for a silicon-based anode material, comprising the following steps: 1) Preparing materials: high-purity graphite powder, high-purity silicon powder and modified asphalt are equipped; 2) Mixing: fully mixing and stirring high-purity graphite powder and high-purity silicon powder uniformly, adding modified asphalt in the rest, and fully stirring and mixing uniformly again: 3) Sintering: and (5) loading the mixed materials into a high-temperature crucible. According to the continuous sintering process and the sintering furnace for the silicon-based anode material, the first rotating mechanism, the frame body, the second rotating mechanism, the box body and the crucible are arranged, the first rotating mechanism drives the frame body, the second rotating mechanism, the box body and the crucible to rotate in the vertical direction, the second rotating mechanism drives the box body and the crucible to rotate in the horizontal direction, so that the crucible simultaneously rotates in the vertical direction and rotates in the horizontal direction, materials in the crucibles at different positions are heated more uniformly, the quality of a finished product of the silicon-based anode material is improved, the advantages of uniform heating are achieved, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of production of silicon-based anode materials, in particular to a continuous sintering process of a silicon-based anode material and a sintering furnace thereof.
Background
With the enhancement of environmental protection and energy crisis consciousness of people, the lithium ion battery is increasingly popular as an environment-friendly energy storage technology, and is widely utilized due to the characteristics of high capacity density, long circulation and high stability, and with the wide application of electronic products and the vigorous development of electric automobiles, the market of the lithium ion battery is increasingly wide, but simultaneously, higher requirements are put forward on the safety of the lithium ion battery.
At present, the domestic lithium battery industry mainly uses artificial graphite as a negative electrode material, a silicon-based negative electrode benefits from higher energy density (4200 mAh/g) of silicon compared with a common artificial graphite negative electrode, a commercial lithium ion battery mainly adopts a graphite negative electrode material, but the theoretical specific capacity of the commercial lithium ion battery is only 372mAh/g, the requirement of the market on the high capacity density of the lithium ion battery cannot be met, and lithium ions up to 9 times can be stored, so that the energy density of the battery is greatly improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a continuous sintering process of a silicon-based anode material and a sintering furnace thereof, which have the advantages of uniform heating and the like, and solve the problems that materials are required to be filled into a crucible and then are put into the sintering furnace for processing when the silicon-based anode material is produced, but the crucible is usually kept still in the sintering furnace, so that the materials in the crucibles at different positions are heated unevenly, and the quality of finished products of the silicon-based anode material is influenced.
In order to achieve the above purpose, the present invention provides the following technical solutions: a continuous sintering process of a silicon-based anode material, comprising the following steps:
1) Preparing materials: high-purity graphite powder, high-purity silicon powder and modified asphalt are equipped;
2) Mixing: fully mixing and stirring high-purity graphite powder and high-purity silicon powder uniformly, adding modified asphalt, and fully stirring and mixing uniformly again;
3) Sintering: loading the mixed materials into a high-temperature crucible, then placing the crucible into a continuous high-temperature anaerobic sintering furnace, slowly heating the crucible in the furnace, fully melting modified asphalt at 200-300 ℃ to uniformly heat the edge to the central part of the crucible, uniformly wrapping the asphalt on the surfaces of high-purity graphite and high-purity silicon powder, continuously heating the product to 1200-1300 ℃ after wrapping, and then fully performing anaerobic sintering at the constant temperature of 1200-1300 ℃;
4) And (3) cooling: the sintered material is cooled by protective gas and is discharged from the furnace after being cooled slowly and indirectly, and can be directly made into lithium battery cathode material products with high energy density and short charging time.
Further, the mass percentage of the high-purity graphite powder is 70-80%, and the mass percentage of the high-purity silicon powder is 10-15%.
Further, the sintering time at 200-300 ℃ is 8-10 hours, the sintering time in the process of continuously heating to 1200-1300 ℃ is 20-30 hours, and the sintering time in the region of 1200-1300 ℃ is 10-15 hours.
The invention further aims to provide a sintering furnace for the silicon-based anode material, which comprises a sintering furnace body, wherein a first rotating mechanism is arranged in the sintering furnace body, a frame body is arranged on the first rotating mechanism, a second rotating mechanism is arranged on the inner bottom wall of the frame body, a plurality of box bodies are arranged at the top of the second rotating mechanism, a crucible is arranged in the box bodies, and a positioning mechanism is arranged in the box bodies.
Further, the first rotating mechanism comprises a first motor, the first motor is fixedly connected to the back of the sintering furnace body, the output end of the first motor penetrates through and extends to the inside of the sintering furnace body, a first rotating shaft is fixedly arranged at the output end of the first motor, a first rotating disc is fixedly arranged on the front face of the first rotating shaft, a plurality of cross rods are fixedly arranged on the front face of the first rotating disc, a first sleeve is rotatably arranged on the outer portion of the cross rod, a baffle is fixedly arranged on the front face of the cross rod, and a connecting rod fixedly connected with the frame body is fixedly arranged on the outer portion of the first sleeve.
Further, the back fixed mounting of fritting furnace body has the protection casing, the protection casing is located the outside of first motor, a plurality of the horizontal pole is the front at first carousel of annular equidistance distribution.
Further, the second rotating mechanism comprises a second motor, a second rotary table is fixedly arranged at the output end of the second motor, a plurality of vertical rods are fixedly arranged at the bottom of the second rotary table, and pulleys which are in contact with the bottom wall in the frame body are fixedly arranged at the bottom of the vertical rods.
Further, a plurality of montants are symmetrically distributed at the bottom of the second turntable, the number of the montants is even, and a plurality of box bodies are distributed at the top of the second turntable in an annular equidistant mode.
Further, positioning mechanism includes four diaphragms, two guide bars and two annular plates, four the diaphragm symmetric distribution is on the inner wall of box body, two the guide bar is located between four diaphragms respectively, two reset springs have been cup jointed to the outside of guide bar, the outside slidable mounting of guide bar has two second sleeves, two reset springs one side opposite to each other is fixed connection with one side opposite to two diaphragms respectively, two reset springs one side opposite to each other is fixed connection with one side opposite to two second sleeves respectively, the outside of second sleeve articulates there is the dead lever, two the dead lever is kept away from one side opposite to each other with two annular plates respectively with one side of second sleeve articulated, two the opposite side of annular plate all contacts with the outside of crucible.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
1. according to the continuous sintering process and the sintering furnace for the silicon-based anode material, the first rotating mechanism, the frame body, the second rotating mechanism, the box body and the crucible are arranged, the first rotating mechanism drives the frame body, the second rotating mechanism, the box body and the crucible to rotate in the vertical direction, the second rotating mechanism drives the box body and the crucible to rotate in the horizontal direction, so that the crucible simultaneously rotates in the vertical direction and rotates in the horizontal direction, materials in the crucibles at different positions are heated more uniformly, the quality of a finished product of the silicon-based anode material is improved, the advantages of uniform heating are achieved, and the use is convenient.
2. According to the continuous sintering process for the silicon-based anode material and the sintering furnace thereof, the positioning mechanism is arranged, so that the crucible can be positioned, when materials in the crucible are sintered, the crucible is not easy to fall from the inside of the box body, the loss is reduced, and the continuous sintering process has the advantage of falling prevention, and is convenient to use.
3. According to the continuous sintering process and the sintering furnace for the silicon-based anode material, the crucible can be disassembled and assembled by the positioning mechanism, the operation mode is simple, the crucible can be conveniently and rapidly installed or taken out, time and labor are saved, the working efficiency is improved, and the continuous sintering process and the sintering furnace for the silicon-based anode material have the advantage of convenience in disassembly and assembly, and are convenient to use.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a right side cross-sectional view of the structure of the present invention;
FIG. 3 is an enlarged view of the invention at A in FIG. 1;
FIG. 4 is a schematic diagram of a frame structure of the present invention;
FIG. 5 is a schematic diagram of the connection between the second turntable and the case according to the present invention;
FIG. 6 is a schematic view of the connection of the cassette, crucible and mounting mechanism of the present invention;
fig. 7 is a schematic view of the structure of the annular plate of the present invention.
In the figure: 1 sintering furnace body, 2 first rotating mechanism, 21 first motor, 22 first rotating shaft, 23 first turntable, 24 cross bar, 25 first sleeve, 26 baffle, 27 connecting rod, 3 frame, 4 second rotating mechanism the device comprises a first motor 41, a first rotary table 42, a first vertical rod 43, a first pulley 44, a first box body 5, a first crucible 6, a first positioning mechanism 7, a first transverse plate 71, a first guide rod 72, a first return spring 73, a first sleeve 74, a first inclined rod 75 and a first annular plate 76.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
referring to fig. 1-7, a continuous sintering process of a silicon-based anode material in this embodiment includes the following steps:
1, preparing materials: high-purity graphite powder, high-purity silicon powder and modified asphalt are equipped;
2, mixing: fully mixing and stirring high-purity graphite powder and high-purity silicon powder uniformly, adding modified asphalt, and fully stirring and mixing uniformly again;
3 sintering: loading the mixed materials into a high-temperature crucible, then placing the crucible into a continuous high-temperature anaerobic sintering furnace, slowly heating the crucible in the furnace, fully melting modified asphalt at 200-300 ℃ to uniformly heat the edge to the central part of the crucible, uniformly wrapping the asphalt on the surfaces of high-purity graphite and high-purity silicon powder, continuously heating the product to 1200-1300 ℃ after wrapping, and then fully performing anaerobic sintering at the constant temperature of 1200-1300 ℃;
4, cooling: the sintered material is cooled by protective gas and is discharged from the furnace after being cooled slowly and indirectly, and can be directly made into lithium battery cathode material products with high energy density and short charging time.
In the embodiment, the mass percentage of the high-purity graphite powder is 70%, and the mass percentage of the high-purity silicon powder is 10%.
In this example, the sintering time at 200-300℃was 8 hours, the sintering time during the continuous temperature rise to 1200-1300℃was 20 hours, and the sintering time in the 1200-1300℃region was 10 hours.
Specifically, in the whole process from the heating of a crucible product in a furnace to the cooling and discharging of the crucible product, the product is heated by radiation heat transfer of a furnace partition wall, fuel combustion is completed in the furnace partition wall, smoke is discharged through a furnace partition wall channel, and after the product is heated and sintered in the furnace, the product is cooled indirectly through a furnace partition wall cavity.
Another object of the present invention is to provide a sintering furnace for a silicon-based anode material, which comprises a sintering furnace body 1, wherein a first rotating mechanism 2 is arranged in the sintering furnace body 1, a frame 3 is arranged on the first rotating mechanism 2, a second rotating mechanism 4 is arranged on the inner bottom wall of the frame 3, a plurality of box bodies 5 are arranged on the top of the second rotating mechanism 4, a crucible 6 is arranged in the box bodies 5, and a positioning mechanism 7 is arranged in the box bodies 5.
Specifically, firstly put into the inside of crucible 6 with the material, then install the inside at box body 5 with crucible 6 through positioning mechanism 7, operating means is simple, be convenient for install or take out crucible 6 fast, save time and laborsaving, work efficiency has been improved, first slewing mechanism 2 drives framework 3, second slewing mechanism 4, box body 5 and crucible 6 carry out vertical direction rotation, second slewing mechanism 4 drives box body 5 and crucible 6 and carries out horizontal direction rotation, make crucible 6 carry out vertical direction rotation and horizontal direction rotation simultaneously, positioning mechanism 7 can fix a position crucible 6, when sintering the material in the crucible 6, crucible 6 is difficult for dropping from the inside of box body 5, the loss has been reduced, the material that makes inside crucible 6 in different positions is heated more evenly, the quality of silicon-based negative pole material finished product has been improved.
In this embodiment, the first rotating mechanism 2 includes a first motor 21, the first motor 21 is fixedly connected to the back surface of the sintering furnace body 1, the output end of the first motor 21 penetrates through and extends to the inside of the sintering furnace body 1, a first rotating shaft 22 is fixedly mounted at the output end of the first motor 21, a first rotating disc 23 is fixedly mounted at the front surface of the first rotating shaft 22, a plurality of cross bars 24 are fixedly mounted at the front surface of the first rotating disc 23, a first sleeve 25 is rotatably mounted at the outer portion of the cross bars 24, a baffle 26 is fixedly mounted at the front surface of the cross bars 24, and a connecting rod 27 fixedly connected with the frame 3 is fixedly mounted at the outer portion of the first sleeve 25.
Specifically, by turning on the first motor 21, the first motor 21 drives the first rotating shaft 22, the first rotating disc 23 and the plurality of cross bars 24 to rotate in the vertical direction, the first sleeve 25 is connected with the frame 3 through the connecting rod 27, and under the influence of gravity, the frame 3 always drives the connecting rod 27 downwards, so that the first sleeve 25 rotates outside the cross bars 24, and the first sleeve 25 is prevented from falling off from the outside of the cross bars 24 through the baffle 26.
In this embodiment, the back of the sintering furnace body 1 is fixedly provided with a protection cover, the protection cover is located outside the first motor 21, the protection cover protects the first motor 21, and the plurality of cross bars 24 are distributed on the front face of the first rotating disc 23 at equal intervals in a ring shape.
In this embodiment, the second rotating mechanism 4 includes a second motor 41, a second turntable 42 is fixedly mounted at an output end of the second motor 41, a plurality of vertical rods 43 are fixedly mounted at a bottom of the second turntable 42, and a pulley 44 contacting with an inner bottom wall of the frame 3 is fixedly mounted at a bottom of the vertical rods 43.
Specifically, by turning on the second motor 41, the second motor 41 drives the second turntable 42 to rotate in the horizontal direction, and the second turntable 42 drives the vertical rod 43 and the pulley 44 to rotate in the horizontal direction in the bottom wall of the frame body 3, so that the second turntable 42 rotates more stably.
In this embodiment, the plurality of vertical rods 43 are symmetrically distributed at the bottom of the second turntable 42, the number of the vertical rods 43 is even, and when the plurality of pulleys 44 rotate, the second turntable 42 can be supported, and the plurality of box bodies 5 are distributed at the top of the second turntable 42 in an annular equidistant manner.
In this embodiment, the positioning mechanism 7 includes four transverse plates 71, two guide rods 72 and two annular plates 76, the four transverse plates 71 are symmetrically distributed on the inner wall of the box 5, the two guide rods 72 are respectively located between the four transverse plates 71, two return springs 73 are sleeved outside the guide rods 72, two second sleeves 74 are slidably mounted outside the guide rods 72, one opposite sides of the two return springs 73 are fixedly connected with opposite sides of the two transverse plates 71, opposite sides of the two return springs 73 are fixedly connected with opposite sides of the two second sleeves 74, inclined rods 75 are hinged to the outer sides of the second sleeves 74, one sides of the two inclined rods 75 away from the second sleeves 74 are hinged to opposite sides of the two annular plates 76, and opposite sides of the two annular plates 76 are in contact with the outer sides of the crucible 6.
Through moving two annular plates 76 in opposite directions, two annular plates 76 drive and all drive two second sleeves 74 through two diagonal rods 75 and carry out the back to back removal in the outside of guide bar 72, two second sleeves 74 extrude two reset springs 73 and produce deformation, then place crucible 6 at the interior bottom wall of box body 5, unclamp two annular plates 76 at last, two reset springs 73 resume deformation and drive two second sleeves 74 and carry out relative movement in the outside of guide bar 72, two second sleeves 74 drive annular plates 76 through two diagonal rods 75 and reset, make two annular plates 76 carry out the centre gripping to crucible 6, make crucible 6 install the inside at box body 5.
Example 2:
referring to fig. 1-7, a continuous sintering process of a silicon-based anode material in this embodiment includes the following steps:
1, preparing materials: high-purity graphite powder, high-purity silicon powder and modified asphalt are equipped;
2, mixing: fully mixing and stirring high-purity graphite powder and high-purity silicon powder uniformly, adding modified asphalt, and fully stirring and mixing uniformly again;
3 sintering: loading the mixed materials into a high-temperature crucible, then placing the crucible into a continuous high-temperature anaerobic sintering furnace, slowly heating the crucible in the furnace, fully melting modified asphalt at 200-300 ℃ to uniformly heat the edge to the central part of the crucible, uniformly wrapping the asphalt on the surfaces of high-purity graphite and high-purity silicon powder, continuously heating the product to 1200-1300 ℃ after wrapping, and then fully performing anaerobic sintering at the constant temperature of 1200-1300 ℃;
4, cooling: the sintered material is cooled by protective gas and is discharged from the furnace after being cooled slowly and indirectly, and can be directly made into lithium battery cathode material products with high energy density and short charging time.
In the embodiment, the mass percentage of the high-purity graphite powder is 75%, and the mass percentage of the high-purity silicon powder is 12.5%.
In this example, the sintering time at 200-300℃was 9 hours, the sintering time during the continuous temperature increase to 1200-1300℃was 25 hours, and the sintering time in the 1200-1300℃region was 12.5 hours.
Specifically, in the whole process from the heating of a crucible product in a furnace to the cooling and discharging of the crucible product, the product is heated by radiation heat transfer of a furnace partition wall, fuel combustion is completed in the furnace partition wall, smoke is discharged through a furnace partition wall channel, and after the product is heated and sintered in the furnace, the product is cooled indirectly through a furnace partition wall cavity.
Another object of the present invention is to provide a sintering furnace for a silicon-based anode material, which comprises a sintering furnace body 1, wherein a first rotating mechanism 2 is arranged in the sintering furnace body 1, a frame 3 is arranged on the first rotating mechanism 2, a second rotating mechanism 4 is arranged on the inner bottom wall of the frame 3, a plurality of box bodies 5 are arranged on the top of the second rotating mechanism 4, a crucible 6 is arranged in the box bodies 5, and a positioning mechanism 7 is arranged in the box bodies 5.
Specifically, firstly put into the inside of crucible 6 with the material, then install the inside at box body 5 with crucible 6 through positioning mechanism 7, operating means is simple, be convenient for install or take out crucible 6 fast, save time and laborsaving, work efficiency has been improved, first slewing mechanism 2 drives framework 3, second slewing mechanism 4, box body 5 and crucible 6 carry out vertical direction rotation, second slewing mechanism 4 drives box body 5 and crucible 6 and carries out horizontal direction rotation, make crucible 6 carry out vertical direction rotation and horizontal direction rotation simultaneously, positioning mechanism 7 can fix a position crucible 6, when sintering the material in the crucible 6, crucible 6 is difficult for dropping from the inside of box body 5, the loss has been reduced, the material that makes inside crucible 6 in different positions is heated more evenly, the quality of silicon-based negative pole material finished product has been improved.
In this embodiment, the first rotating mechanism 2 includes a first motor 21, the first motor 21 is fixedly connected to the back surface of the sintering furnace body 1, the output end of the first motor 21 penetrates through and extends to the inside of the sintering furnace body 1, a first rotating shaft 22 is fixedly mounted at the output end of the first motor 21, a first rotating disc 23 is fixedly mounted at the front surface of the first rotating shaft 22, a plurality of cross bars 24 are fixedly mounted at the front surface of the first rotating disc 23, a first sleeve 25 is rotatably mounted at the outer portion of the cross bars 24, a baffle 26 is fixedly mounted at the front surface of the cross bars 24, and a connecting rod 27 fixedly connected with the frame 3 is fixedly mounted at the outer portion of the first sleeve 25.
Specifically, by turning on the first motor 21, the first motor 21 drives the first rotating shaft 22, the first rotating disc 23 and the plurality of cross bars 24 to rotate in the vertical direction, the first sleeve 25 is connected with the frame 3 through the connecting rod 27, and under the influence of gravity, the frame 3 always drives the connecting rod 27 downwards, so that the first sleeve 25 rotates outside the cross bars 24, and the first sleeve 25 is prevented from falling off from the outside of the cross bars 24 through the baffle 26.
In this embodiment, the back of the sintering furnace body 1 is fixedly provided with a protection cover, the protection cover is located outside the first motor 21, the protection cover protects the first motor 21, and the plurality of cross bars 24 are distributed on the front face of the first rotating disc 23 at equal intervals in a ring shape.
In this embodiment, the second rotating mechanism 4 includes a second motor 41, a second turntable 42 is fixedly mounted at an output end of the second motor 41, a plurality of vertical rods 43 are fixedly mounted at a bottom of the second turntable 42, and a pulley 44 contacting with an inner bottom wall of the frame 3 is fixedly mounted at a bottom of the vertical rods 43.
Specifically, by turning on the second motor 41, the second motor 41 drives the second turntable 42 to rotate in the horizontal direction, and the second turntable 42 drives the vertical rod 43 and the pulley 44 to rotate in the horizontal direction in the bottom wall of the frame body 3, so that the second turntable 42 rotates more stably.
In this embodiment, the plurality of vertical rods 43 are symmetrically distributed at the bottom of the second turntable 42, the number of the vertical rods 43 is even, and when the plurality of pulleys 44 rotate, the second turntable 42 can be supported, and the plurality of box bodies 5 are distributed at the top of the second turntable 42 in an annular equidistant manner.
In this embodiment, the positioning mechanism 7 includes four transverse plates 71, two guide rods 72 and two annular plates 76, the four transverse plates 71 are symmetrically distributed on the inner wall of the box 5, the two guide rods 72 are respectively located between the four transverse plates 71, two return springs 73 are sleeved outside the guide rods 72, two second sleeves 74 are slidably mounted outside the guide rods 72, one opposite sides of the two return springs 73 are fixedly connected with opposite sides of the two transverse plates 71, opposite sides of the two return springs 73 are fixedly connected with opposite sides of the two second sleeves 74, inclined rods 75 are hinged to the outer sides of the second sleeves 74, one sides of the two inclined rods 75 away from the second sleeves 74 are hinged to opposite sides of the two annular plates 76, and opposite sides of the two annular plates 76 are in contact with the outer sides of the crucible 6.
Through moving two annular plates 76 in opposite directions, two annular plates 76 drive and all drive two second sleeves 74 through two diagonal rods 75 and carry out the back to back removal in the outside of guide bar 72, two second sleeves 74 extrude two reset springs 73 and produce deformation, then place crucible 6 at the interior bottom wall of box body 5, unclamp two annular plates 76 at last, two reset springs 73 resume deformation and drive two second sleeves 74 and carry out relative movement in the outside of guide bar 72, two second sleeves 74 drive annular plates 76 through two diagonal rods 75 and reset, make two annular plates 76 carry out the centre gripping to crucible 6, make crucible 6 install the inside at box body 5.
Example 3:
referring to fig. 1-7, a continuous sintering process of a silicon-based anode material in this embodiment includes the following steps:
1, preparing materials: high-purity graphite powder, high-purity silicon powder and modified asphalt are equipped;
2, mixing: fully mixing and stirring high-purity graphite powder and high-purity silicon powder uniformly, adding modified asphalt, and fully stirring and mixing uniformly again;
3 sintering: loading the mixed materials into a high-temperature crucible, then placing the crucible into a continuous high-temperature anaerobic sintering furnace, slowly heating the crucible in the furnace, fully melting modified asphalt at 200-300 ℃ to uniformly heat the edge to the central part of the crucible, uniformly wrapping the asphalt on the surfaces of high-purity graphite and high-purity silicon powder, continuously heating the product to 1200-1300 ℃ after wrapping, and then fully performing anaerobic sintering at the constant temperature of 1200-1300 ℃;
4, cooling: the sintered material is cooled by protective gas and is discharged from the furnace after being cooled slowly and indirectly, and can be directly made into lithium battery cathode material products with high energy density and short charging time.
In the embodiment, the mass percentage of the high-purity graphite powder is 80%, and the mass percentage of the high-purity silicon powder is 15%.
In this example, the sintering time at 200-300℃is 10 hours, the sintering time during the continuous temperature rise to 1200-1300℃is 30 hours, and the sintering time in the 1200-1300℃region is 15 hours.
Specifically, in the whole process from the heating of a crucible product in a furnace to the cooling and discharging of the crucible product, the product is heated by radiation heat transfer of a furnace partition wall, fuel combustion is completed in the furnace partition wall, smoke is discharged through a furnace partition wall channel, and after the product is heated and sintered in the furnace, the product is cooled indirectly through a furnace partition wall cavity.
Another object of the present invention is to provide a sintering furnace for a silicon-based anode material, which comprises a sintering furnace body 1, wherein a first rotating mechanism 2 is arranged in the sintering furnace body 1, a frame 3 is arranged on the first rotating mechanism 2, a second rotating mechanism 4 is arranged on the inner bottom wall of the frame 3, a plurality of box bodies 5 are arranged on the top of the second rotating mechanism 4, a crucible 6 is arranged in the box bodies 5, and a positioning mechanism 7 is arranged in the box bodies 5.
Specifically, firstly put into the inside of crucible 6 with the material, then install the inside at box body 5 with crucible 6 through positioning mechanism 7, operating means is simple, be convenient for install or take out crucible 6 fast, save time and laborsaving, work efficiency has been improved, first slewing mechanism 2 drives framework 3, second slewing mechanism 4, box body 5 and crucible 6 carry out vertical direction rotation, second slewing mechanism 4 drives box body 5 and crucible 6 and carries out horizontal direction rotation, make crucible 6 carry out vertical direction rotation and horizontal direction rotation simultaneously, positioning mechanism 7 can fix a position crucible 6, when sintering the material in the crucible 6, crucible 6 is difficult for dropping from the inside of box body 5, the loss has been reduced, the material that makes inside crucible 6 in different positions is heated more evenly, the quality of silicon-based negative pole material finished product has been improved.
In this embodiment, the first rotating mechanism 2 includes a first motor 21, the first motor 21 is fixedly connected to the back surface of the sintering furnace body 1, the output end of the first motor 21 penetrates through and extends to the inside of the sintering furnace body 1, a first rotating shaft 22 is fixedly mounted at the output end of the first motor 21, a first rotating disc 23 is fixedly mounted at the front surface of the first rotating shaft 22, a plurality of cross bars 24 are fixedly mounted at the front surface of the first rotating disc 23, a first sleeve 25 is rotatably mounted at the outer portion of the cross bars 24, a baffle 26 is fixedly mounted at the front surface of the cross bars 24, and a connecting rod 27 fixedly connected with the frame 3 is fixedly mounted at the outer portion of the first sleeve 25.
Specifically, by turning on the first motor 21, the first motor 21 drives the first rotating shaft 22, the first rotating disc 23 and the plurality of cross bars 24 to rotate in the vertical direction, the first sleeve 25 is connected with the frame 3 through the connecting rod 27, and under the influence of gravity, the frame 3 always drives the connecting rod 27 downwards, so that the first sleeve 25 rotates outside the cross bars 24, and the first sleeve 25 is prevented from falling off from the outside of the cross bars 24 through the baffle 26.
In this embodiment, the back of the sintering furnace body 1 is fixedly provided with a protection cover, the protection cover is located outside the first motor 21, the protection cover protects the first motor 21, and the plurality of cross bars 24 are distributed on the front face of the first rotating disc 23 at equal intervals in a ring shape.
In this embodiment, the second rotating mechanism 4 includes a second motor 41, a second turntable 42 is fixedly mounted at an output end of the second motor 41, a plurality of vertical rods 43 are fixedly mounted at a bottom of the second turntable 42, and a pulley 44 contacting with an inner bottom wall of the frame 3 is fixedly mounted at a bottom of the vertical rods 43.
Specifically, by turning on the second motor 41, the second motor 41 drives the second turntable 42 to rotate in the horizontal direction, and the second turntable 42 drives the vertical rod 43 and the pulley 44 to rotate in the horizontal direction in the bottom wall of the frame body 3, so that the second turntable 42 rotates more stably.
In this embodiment, the plurality of vertical rods 43 are symmetrically distributed at the bottom of the second turntable 42, the number of the vertical rods 43 is even, and when the plurality of pulleys 44 rotate, the second turntable 42 can be supported, and the plurality of box bodies 5 are distributed at the top of the second turntable 42 in an annular equidistant manner.
In this embodiment, the positioning mechanism 7 includes four transverse plates 71, two guide rods 72 and two annular plates 76, the four transverse plates 71 are symmetrically distributed on the inner wall of the box 5, the two guide rods 72 are respectively located between the four transverse plates 71, two return springs 73 are sleeved outside the guide rods 72, two second sleeves 74 are slidably mounted outside the guide rods 72, one opposite sides of the two return springs 73 are fixedly connected with opposite sides of the two transverse plates 71, opposite sides of the two return springs 73 are fixedly connected with opposite sides of the two second sleeves 74, inclined rods 75 are hinged to the outer sides of the second sleeves 74, one sides of the two inclined rods 75 away from the second sleeves 74 are hinged to opposite sides of the two annular plates 76, and opposite sides of the two annular plates 76 are in contact with the outer sides of the crucible 6.
Through moving two annular plates 76 in opposite directions, two annular plates 76 drive and all drive two second sleeves 74 through two diagonal rods 75 and carry out the back to back removal in the outside of guide bar 72, two second sleeves 74 extrude two reset springs 73 and produce deformation, then place crucible 6 at the interior bottom wall of box body 5, unclamp two annular plates 76 at last, two reset springs 73 resume deformation and drive two second sleeves 74 and carry out relative movement in the outside of guide bar 72, two second sleeves 74 drive annular plates 76 through two diagonal rods 75 and reset, make two annular plates 76 carry out the centre gripping to crucible 6, make crucible 6 install the inside at box body 5.
The working principle of the embodiment is as follows:
(1) Firstly, putting materials into the crucible 6, moving two annular plates 76 in opposite directions, driving two second sleeves 74 to move in opposite directions outside a guide rod 72 by two inclined rods 75 by two annular plates 76, extruding two reset springs 73 by two second sleeves 74 to deform, then placing the crucible 6 on the inner bottom wall of a box body 5, finally loosening the two annular plates 76, restoring deformation by the two reset springs 73 to drive the two second sleeves 74 to move relatively outside the guide rod 72, and driving the annular plates 76 to reset by the two second sleeves 74 by the two inclined rods 75, so that the two annular plates 76 clamp the crucible 6, and the crucible 6 is arranged in the box body 5.
(2) By starting the first motor 21, the first motor 21 drives the first rotating shaft 22, the first rotating disc 23 and the plurality of cross bars 24 to rotate vertically, the first sleeve 25 is connected with the frame 3 through the connecting rod 27, the frame 3 always drives the connecting rod 27 to downwards under the influence of gravity, the first sleeve 25 rotates outside the cross bars 24, the first sleeve 25 is prevented from falling off from the outside of the cross bars 24 through the baffle 26, the second motor 41 is started, the second motor 41 drives the second rotating disc 42, the plurality of box bodies 5 and the plurality of crucibles 6 to rotate horizontally, the second rotating disc 42 drives the vertical rods 43 and the pulleys 44 to rotate horizontally in the inner bottom wall of the frame 3, the second rotating disc 42 rotates more stably, the crucibles 6 rotate vertically and horizontally at the same time, materials in the crucibles 6 at different positions are heated more uniformly, the quality of silicon-based cathode material finished products is improved, and the silicon-based cathode material finished product heating device has the advantage of uniform heating and is convenient to use;
(3) The two annular plates 76 position the crucible 6, and when the materials in the crucible 6 are sintered, the crucible 6 is not easy to fall from the inside of the box body 5, so that the loss is reduced, the anti-falling device has the advantage of falling prevention, and the use is convenient.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A sintering furnace for silicon-based anode materials, comprising a sintering furnace body (1), characterized in that: the sintering furnace comprises a sintering furnace body (1), wherein a first rotating mechanism (2) is arranged in the sintering furnace body (1), a frame body (3) is arranged on the first rotating mechanism (2), a second rotating mechanism (4) is arranged on the inner bottom wall of the frame body (3), a plurality of box bodies (5) are arranged at the top of the second rotating mechanism (4), a crucible (6) is arranged in the box bodies (5), and a positioning mechanism (7) is arranged in the box bodies (5);
the sintering furnace comprises a sintering furnace body (1), and is characterized in that the first rotating mechanism (2) comprises a first motor (21), the first motor (21) is fixedly connected to the back of the sintering furnace body (1), the output end of the first motor (21) penetrates through and extends to the inside of the sintering furnace body (1), a first rotating shaft (22) is fixedly arranged at the output end of the first motor (21), a first rotating disc (23) is fixedly arranged on the front of the first rotating shaft (22), a plurality of cross bars (24) are fixedly arranged on the front of the first rotating disc (23), a first sleeve (25) is rotatably arranged on the outer portion of the cross bars (24), a baffle (26) is fixedly arranged on the front of the cross bars (24), and a connecting rod (27) fixedly connected with the frame body (3) is fixedly arranged on the outer portion of the first sleeve (25).
The second rotating mechanism (4) comprises a second motor (41), a second rotary table (42) is fixedly arranged at the output end of the second motor (41), a plurality of vertical rods (43) are fixedly arranged at the bottom of the second rotary table (42), and pulleys (44) which are in contact with the inner bottom wall of the frame body (3) are fixedly arranged at the bottom of the vertical rods (43);
the positioning mechanism (7) comprises four transverse plates (71), two guide rods (72) and two annular plates (76), wherein the transverse plates (71) are symmetrically distributed on the inner wall of the box body (5), the two guide rods (72) are respectively located between the four transverse plates (71), two return springs (73) are sleeved outside the guide rods (72), two second sleeves (74) are slidably arranged outside the guide rods (72), one opposite sides of the two return springs (73) are fixedly connected with one opposite sides of the two transverse plates (71) respectively, one opposite sides of the two return springs (73) are fixedly connected with one opposite side of the two second sleeves (74) respectively, one opposite sides of the two second sleeves (74) are hinged with inclined rods (75), one sides of the two inclined rods (75) away from the second sleeves (74) are hinged with one opposite sides of the two annular plates (76) respectively, and one opposite sides of the two annular plates (76) are in contact with the outer sides of the crucible (6).
2. The sintering furnace for silicon-based anode material according to claim 1, wherein: the back of the sintering furnace body (1) is fixedly provided with a protective cover, the protective cover is positioned outside the first motor (21), and a plurality of cross bars (24) are distributed on the front face of the first rotating disc (23) in annular equidistant mode.
3. The sintering furnace for silicon-based anode material according to claim 1, wherein: the plurality of vertical rods (43) are symmetrically distributed at the bottom of the second rotary table (42), the number of the vertical rods (43) is even, and the plurality of box bodies (5) are distributed at the top of the second rotary table (42) in an annular equidistant mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211179026.8A CN115745609B (en) | 2022-09-27 | 2022-09-27 | Continuous sintering process and sintering furnace for silicon-based anode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211179026.8A CN115745609B (en) | 2022-09-27 | 2022-09-27 | Continuous sintering process and sintering furnace for silicon-based anode material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115745609A CN115745609A (en) | 2023-03-07 |
| CN115745609B true CN115745609B (en) | 2024-04-05 |
Family
ID=85350258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211179026.8A Active CN115745609B (en) | 2022-09-27 | 2022-09-27 | Continuous sintering process and sintering furnace for silicon-based anode material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115745609B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0275614A1 (en) * | 1987-01-20 | 1988-07-27 | The Carborundum Company | System for preventing decomposition of silicon carbide articles during sintering |
| CN103633307A (en) * | 2013-12-20 | 2014-03-12 | 大连宏光锂业股份有限公司 | Method for producing silicon-carbon composite negative electrode material of lithium ion battery |
| CN111342035A (en) * | 2020-03-11 | 2020-06-26 | 西安越遴新材料研究院有限公司 | Method for modifying silicon-carbon composite negative electrode by asphalt modification process derivative |
| CN215572111U (en) * | 2021-05-11 | 2022-01-18 | 宁波晨鑫维克工业科技有限公司 | Crucible tilting mechanism of fritting furnace |
| CN114472833A (en) * | 2022-01-04 | 2022-05-13 | 河南科技大学 | Rotary furnace body type hot continuous casting device for horizontal continuous casting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224078A (en) * | 2018-11-27 | 2020-06-02 | 广州汽车集团股份有限公司 | Silicon-based composite negative electrode material, preparation method thereof and lithium ion battery negative electrode |
-
2022
- 2022-09-27 CN CN202211179026.8A patent/CN115745609B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0275614A1 (en) * | 1987-01-20 | 1988-07-27 | The Carborundum Company | System for preventing decomposition of silicon carbide articles during sintering |
| CN103633307A (en) * | 2013-12-20 | 2014-03-12 | 大连宏光锂业股份有限公司 | Method for producing silicon-carbon composite negative electrode material of lithium ion battery |
| CN111342035A (en) * | 2020-03-11 | 2020-06-26 | 西安越遴新材料研究院有限公司 | Method for modifying silicon-carbon composite negative electrode by asphalt modification process derivative |
| CN215572111U (en) * | 2021-05-11 | 2022-01-18 | 宁波晨鑫维克工业科技有限公司 | Crucible tilting mechanism of fritting furnace |
| CN114472833A (en) * | 2022-01-04 | 2022-05-13 | 河南科技大学 | Rotary furnace body type hot continuous casting device for horizontal continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115745609A (en) | 2023-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212720847U (en) | High-temperature sintering equipment for lithium ion negative electrode material | |
| CN115745609B (en) | Continuous sintering process and sintering furnace for silicon-based anode material | |
| CN107249726B (en) | Manufacturing equipment and preparation method of silicon-oxygen compound | |
| CN111649568A (en) | A dewatering drying device for lithium cell production line | |
| CN218077687U (en) | Liquid phase mixing device of lithium titanate negative electrode material | |
| CN216835866U (en) | Discharging device for lithium battery production | |
| CN113896202B (en) | Efficient industrial silicon smelting equipment and method | |
| CN202869156U (en) | Microwave drying device | |
| CN113782703B (en) | Lithium battery negative plate preparation device | |
| CN212109389U (en) | Lithium battery raw material circulation drying device | |
| CN112503931A (en) | Tank body alternating type vacuum furnace for producing silicon monoxide and preparation method | |
| CN220138383U (en) | Lithium battery baking and liquid injection integrated equipment | |
| CN111146402A (en) | Method for preparing lithium battery positive electrode material by gel forming process sintering | |
| CN220177353U (en) | Lithium battery anode uniform coating machine | |
| CN219735848U (en) | Stirrer for lithium battery material drying device | |
| CN219640680U (en) | Vacuum smelting quick hardening furnace | |
| CN219264924U (en) | High nickel ternary material continuous atmosphere protection rotary furnace | |
| CN109346694A (en) | A kind of graphene lithium battery material and preparation method thereof | |
| CN215724988U (en) | High-temperature industrial furnace convenient for semi-automatic feeding and discharging | |
| CN218781579U (en) | Drying device for coal powder preparation | |
| CN217490751U (en) | Continuous granulation reation kettle | |
| CN210974523U (en) | Nitrogen atmosphere roller bed carbonization furnace for lithium battery cathode material | |
| CN215887163U (en) | Tempering furnace convenient to clean for precision spring machining | |
| CN218047391U (en) | Horizontal lithium battery cathode material coating granulation high-temperature reaction kettle | |
| CN215855780U (en) | Quartz glass diffusion tube production cooling device for solar photovoltaic cell |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |