CN212274594U - Continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery material - Google Patents
Continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery material Download PDFInfo
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- CN212274594U CN212274594U CN202020361386.XU CN202020361386U CN212274594U CN 212274594 U CN212274594 U CN 212274594U CN 202020361386 U CN202020361386 U CN 202020361386U CN 212274594 U CN212274594 U CN 212274594U
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- lithium iron
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Abstract
The utility model discloses a lithium iron phosphate battery material sintering continuous type atmosphere protection rotary furnace, including boiler tube and the lagging casing of establishing to the outer cover in proper order from interior, install the heater in the annular gap between boiler tube and the lagging casing, the boiler tube is composite ceramic boiler tube, and the boiler tube is the hexagon structure. The utility model discloses the boiler tube adopts composite ceramic structure, and high temperature resistance is good, has both guaranteed the material uniformity like this and has guaranteed the material not polluted by the metal again, and the boiler tube adopts hexagonal structure simultaneously, is favorable to turning over of material to fry, makes the material each point receive the temperature unanimous, improves sintering efficiency and yields.
Description
Technical Field
The utility model relates to a technical field of heating is carried to the material, especially relates to lithium iron phosphate battery material sintering continuous type atmosphere protection rotary furnace.
Background
The lithium iron phosphate battery material is mainly used for various lithium ion batteries. The equipment for sintering the lithium battery electrode material mainly comprises a push plate furnace, a roller bed furnace, a bell jar furnace, a rotary furnace and the like. The pushed slab kiln and the roller kiln are relatively mature furnaces for sintering the electrode materials of the lithium battery, the sintering temperature is varied from 400 ℃ to 1400 ℃, and the sintering process comprises the stages of heating, constant temperature, cooling and the like. The sintering equipment can be divided into a static sintering furnace and a dynamic sintering furnace according to whether the materials are turned over during sintering. The static sintering furnace mainly comprises a push plate furnace, a roller furnace, a bell jar furnace and the like, namely, the materials are relatively kept still when sintered in the furnace, after sintering, the materials close to the outside of the carrier are directly heated and directly contacted with the atmosphere in the furnace, and the powder close to the center of the carrier is heated through the heat conduction of the external materials and is not contacted with the atmosphere in the furnace, so the quality of the two is different, the consistency of the materials cannot be ensured, and the static sintering furnace obviously cannot meet the requirements.
The dynamic sintering furnace, such as the silicon-carbon negative electrode material continuous atmosphere protection rotary furnace applied by the applicant, has a reception number of 2019224601446, and comprises a furnace tube and a heat preservation shell which are sequentially sleeved from inside to outside, wherein a heater is arranged between the furnace tube and the heat preservation shell, the furnace tube is a composite ceramic furnace tube, and two ends of the furnace tube are sealed by sealing devices; one end of the spiral feeder penetrates through the sealing device at the inlet end and extends to the inner cavity of the furnace pipe; one end of the gas inlet pipe penetrates through the sealing device at the outlet end and extends to the inner cavity of the furnace pipe, and the other end of the gas inlet pipe is connected with a protective gas supply system; a plurality of pairs of supporting rollers for supporting the heat preservation shell are uniformly distributed at intervals along the length direction of the bottom of the heat preservation shell, and a height adjusting device is arranged at the bottom of each pair of supporting rollers. The furnace tube adopts a composite ceramic structure and has good high-temperature resistance, so that the consistency of materials is ensured and the materials are not polluted by metal; the products are continuously fed in and out in the furnace tube through the height adjusting device, and the sintering process is completed through temperature rise, constant temperature and temperature reduction in sequence.
The applicant also applies for a high-nickel ternary material continuous atmosphere protection rotary furnace with a acceptance number of 2019224601554, which comprises a furnace tube and a heat preservation shell sleeved in sequence from inside to outside, wherein a heater is arranged between the furnace tube and the heat preservation shell, the furnace tube is a composite ceramic furnace tube, and the inner wall of the furnace tube is of a spiral structure; two ends of the furnace tube are sealed by rotary dynamic sealing devices, one end of the spiral feeder penetrates through the rotary dynamic sealing device at the inlet end and extends to the inner cavity of the furnace tube, and an exhaust device is arranged at the top of the inlet end of the furnace tube; one end of the air inlet pipe penetrates through the rotary dynamic sealing device at the outlet end and extends to the inner cavity of the furnace pipe, and the other end of the air inlet pipe is connected with an oxygen supply system; the heat preservation shell is provided with a driving mechanism for driving the heat preservation shell to rotate. The composite ceramic structure is adopted, the high-temperature resistance is good, the consistency of materials is guaranteed, the materials are prevented from being polluted by metal, products continuously enter and exit through the spiral structure in the furnace tube, and the sintering process is completed through temperature rise, constant temperature and temperature reduction in sequence.
The two structures have the following defects: the furnace tubes of the two rotary furnaces are of cylindrical structures, and researches show that the furnace tubes of the cylindrical structures are not beneficial to stir-frying of materials, the materials cannot be comprehensively and comprehensively heated, and the consistency of heating of each point of the materials cannot be guaranteed.
Disclosure of Invention
The utility model aims to overcome the not enough of above-mentioned technique, provide a simple structure, be favorable to turning over the continuous atmosphere protection rotary furnace of lithium iron phosphate battery material sintering of stir-fry heating of product.
In order to realize the purpose of the utility model, the utility model adopts the technical scheme that: a continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery materials comprises a furnace tube and a heat preservation shell which are sequentially sleeved from inside to outside, wherein a heater is arranged in an annular gap between the furnace tube and the heat preservation shell, the furnace tube is a composite ceramic furnace tube, two ends of the furnace tube are sealed by a rotary dynamic sealing device, one end of the furnace tube is an inlet end, and the other end of the furnace tube is an outlet end; one end of a spiral feeder penetrates through the rotary dynamic sealing device at the inlet end and extends to the inner cavity of the furnace tube at the inlet end, the top of the other end of the spiral feeder is connected with a feeding bin through a pipeline, and the top of the inlet end of the furnace tube is additionally provided with an exhaust device; one end of an air inlet pipe penetrates through the rotary dynamic sealing device at the outlet end and extends to the inner cavity of the furnace pipe at the outlet end, the other end of the air inlet pipe is connected with a protective gas supply system, and the bottom of the outlet end of the furnace pipe is further connected with a material receiving bin through a pipeline; a plurality of pairs of supporting rollers for supporting the heat-insulating shell are uniformly distributed at intervals along the length direction of the bottom of the heat-insulating shell, the central axes of the supporting rollers and the heat-insulating shell are parallel to each other, each pair of supporting rollers are symmetrically distributed by taking the central axis of the heat-insulating shell as a center, and the distance between each pair of supporting rollers is smaller than the diameter of the heat-insulating shell; the bottom of each pair of supporting rollers is provided with a height adjusting device; the heating furnace is characterized in that the furnace tube is of a hexagonal structure.
After the materials are put into a feeding bin, the materials are fed into a furnace tube through a spiral feeder, the furnace tube is controlled by a heater to be heated, because a height adjusting device is arranged at the bottom of a supporting roll, the height of the supporting roll from an inlet to an outlet is sequentially reduced during feeding, so that a furnace body is inclined, the materials are conveyed to a set temperature zone under the action of gravity, and the materials are sequentially heated, thermostated and cooled and finally conveyed to a receiving bin; in the process, the materials are continuously turned and fried in the furnace tube with the hexagonal structure, and sintering is completed in the protective gas atmosphere.
Further, the furnace tube is formed by splicing six ceramic plates, and every two adjacent ceramic plates are connected through a concave-convex structure in a clamping mode.
Furthermore, each height adjusting device comprises a supporting plate stretching under the pair of supporting rollers, two ends of each supporting roller are respectively provided with a side plate, a roller shaft of each supporting roller is rotatably arranged on the corresponding side plate, and the bottom end of each side plate is fixed on the upper surface of the supporting plate; and a mechanical screw rod adjusting device is arranged at the center of the lower surface of the supporting plate corresponding to each supporting roller, and the mechanical screw rod adjusting devices under the same supporting plate are symmetrically distributed by taking the central axis of the heat-insulating shell as the central line.
Furthermore, the rotary dynamic sealing device is a graphite ring rotary dynamic sealing device.
Furthermore, two pairs of supporting rollers are arranged at the bottom of the heat-insulating shell.
Further, an expansion compensator is installed on the rotary dynamic sealing device.
Furthermore, the two ends of the heater and the heat preservation shell are positioned on the same plane, and the two ends of the furnace tube extend out of the two ends of the heater.
The utility model has the advantages that: the temperature in the furnace tube is ensured to be controllable through the matching of the heater, the composite ceramic furnace tube and the heat preservation shell, so that products continuously enter and exit the furnace tube, and the sintering process is completed through heating, constant temperature and cooling in sequence; the furnace body enables the material to move from the inlet to the outlet through the height adjusting device, so that continuous production is realized; the furnace tube adopts a composite ceramic structure, has good high temperature resistance, ensures the consistency of materials and prevents the materials from being polluted by metal, and simultaneously adopts a hexagonal structure, thereby being beneficial to stir-frying the materials, ensuring that all points of the materials are heated uniformly, and improving the sintering efficiency and the yield.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a schematic structural diagram of the furnace tube of the present invention.
In the figure: the device comprises a furnace tube 1, a heat preservation shell 2, a heater 3, a rotary dynamic sealing device 4, a spiral feeder 5, a feeding bin 6, an exhaust device 7, an air inlet pipe 8, a protective gas supply system 9, a material receiving bin 10, a supporting roller 11, a height adjusting device 12, a driving mechanism 13, a ceramic plate 14, a supporting plate 15, a side plate 16, a roller shaft 17, a mechanical screw rod adjusting device 18 and an expansion compensator 19.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, a continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery materials comprises a furnace tube 1 and a heat preservation shell 2 which are sequentially sleeved from inside to outside, a heater 3 is arranged in an annular gap between the furnace tube 1 and the heat preservation shell 2, the furnace tube 1 is a composite ceramic furnace tube 1, two ends of the heater 3 and the heat preservation shell 2 are positioned on the same plane, and two ends of the furnace tube 1 extend out of two ends of the heater 3; the two ends of the furnace tube 1 are sealed by rotary dynamic sealing devices 4, the rotary dynamic sealing devices 4 are graphite ring rotary dynamic sealing devices 4, expansion compensators 19 are arranged on the rotary dynamic sealing devices 4, one end of the furnace tube 1 is an inlet end, and the other end is an outlet end; one end of a spiral feeder 5 penetrates through the rotary dynamic sealing device 4 at the inlet end and extends to the inner cavity of the furnace tube 1 at the inlet end, the top of the other end is connected with a feeding bin 6 through a pipeline, and the top of the inlet end of the furnace tube 1 is additionally provided with an exhaust device 7; one end of an air inlet pipe 8 penetrates through the rotary dynamic sealing device 4 at the outlet end and extends to the inner cavity of the furnace tube 1 at the outlet end, the other end of the air inlet pipe is connected with a protective gas supply system 9, and the bottom of the outlet end of the furnace tube 1 is further connected with a material receiving bin 10 through a pipeline; two pairs of supporting rollers 11 for supporting the heat preservation shell 2 are uniformly distributed at intervals at the bottom of the heat preservation shell 2 along the length direction of the heat preservation shell, the central axes of the supporting rollers 11 and the heat preservation shell 2 are parallel to each other, each pair of supporting rollers 11 are symmetrically distributed by taking the central axis of the heat preservation shell 2 as a center, and the distance between each pair of supporting rollers 11 is smaller than the diameter of the heat preservation shell 2; a height adjusting device 12 is mounted at the bottom of each pair of supporting rollers 11, each height adjusting device 12 comprises a supporting plate 15 stretching across the lower part of each pair of supporting rollers 11, two ends of each supporting roller 11 are respectively provided with a side plate 16, a roller shaft 17 of each supporting roller 11 is rotatably mounted on the corresponding side plate 16, and the bottom end of each side plate 16 is fixed on the upper surface of the supporting plate 15; a mechanical screw adjusting device 18 is arranged at the center of the lower surface of the supporting plate 15 corresponding to each supporting roller 11, and the mechanical screw adjusting devices 18 under the same supporting plate 15 are symmetrically distributed by taking the central axis of the heat preservation shell 2 as the central line; the heat preservation shell 2 is provided with a driving mechanism 13 for driving the heat preservation shell 2, the heater 3 and the furnace tube 1 to rotate simultaneously, the furnace tube 1 is of a hexagonal structure, the furnace tube 1 is formed by splicing six ceramic plates 14, and every two adjacent ceramic plates 14 are connected through a concave-convex structure in a clamping mode.
The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (7)
1. A continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery materials comprises a furnace tube and a heat preservation shell which are sequentially sleeved from inside to outside, wherein a heater is arranged in an annular gap between the furnace tube and the heat preservation shell, the furnace tube is a composite ceramic furnace tube, two ends of the furnace tube are sealed by a rotary dynamic sealing device, one end of the furnace tube is an inlet end, and the other end of the furnace tube is an outlet end; one end of a spiral feeder penetrates through the rotary dynamic sealing device at the inlet end and extends to the inner cavity of the furnace tube at the inlet end, the top of the other end of the spiral feeder is connected with a feeding bin through a pipeline, and the top of the inlet end of the furnace tube is additionally provided with an exhaust device; one end of an air inlet pipe penetrates through the rotary dynamic sealing device at the outlet end and extends to the inner cavity of the furnace pipe at the outlet end, the other end of the air inlet pipe is connected with a protective gas supply system, and the bottom of the outlet end of the furnace pipe is further connected with a material receiving bin through a pipeline; a plurality of pairs of supporting rollers for supporting the heat-insulating shell are uniformly distributed at intervals along the length direction of the bottom of the heat-insulating shell, the central axes of the supporting rollers and the heat-insulating shell are parallel to each other, each pair of supporting rollers are symmetrically distributed by taking the central axis of the heat-insulating shell as a center, and the distance between each pair of supporting rollers is smaller than the diameter of the heat-insulating shell; the bottom of each pair of supporting rollers is provided with a height adjusting device; the heating furnace is characterized in that the furnace tube is of a hexagonal structure.
2. The continuous sintering atmosphere protection rotary furnace for lithium iron phosphate battery materials as claimed in claim 1, wherein the furnace tube is formed by splicing six ceramic plates, and every two adjacent ceramic plates are connected through a concave-convex structure in a clamping manner.
3. The continuous atmosphere protection rotary furnace for lithium iron phosphate battery material sintering as claimed in claim 1, wherein each of the height adjusting devices comprises a support plate spanning under a pair of support rollers, each support roller has a side plate at both ends, the roller shaft of each support roller is rotatably mounted on the corresponding side plate, and the bottom end of the side plate is fixed on the upper surface of the support plate; and a mechanical screw rod adjusting device is arranged at the center of the lower surface of the supporting plate corresponding to each supporting roller, and the mechanical screw rod adjusting devices under the same supporting plate are symmetrically distributed by taking the central axis of the heat-insulating shell as the central line.
4. The continuous atmosphere protection rotary furnace for lithium iron phosphate battery material sintering as claimed in claim 1, wherein the rotary dynamic sealing device is a graphite ring rotary dynamic sealing device.
5. The continuous atmosphere protection rotary furnace for lithium iron phosphate battery material sintering as claimed in claim 1, wherein two pairs of supporting rollers are arranged at the bottom of the heat preservation shell.
6. The continuous sintering atmosphere protection rotary furnace for lithium iron phosphate battery materials as claimed in claim 1, wherein an expansion compensator is mounted on the rotary dynamic sealing device.
7. The continuous sintering atmosphere protection rotary furnace for lithium iron phosphate battery materials as claimed in claim 1, wherein the two ends of the heater and the heat preservation shell are in the same plane, and the two ends of the furnace tube extend out of the two ends of the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020361386.XU CN212274594U (en) | 2020-03-20 | 2020-03-20 | Continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020361386.XU CN212274594U (en) | 2020-03-20 | 2020-03-20 | Continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery material |
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| Publication Number | Publication Date |
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| CN212274594U true CN212274594U (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020361386.XU Active CN212274594U (en) | 2020-03-20 | 2020-03-20 | Continuous atmosphere protection rotary furnace for sintering lithium iron phosphate battery material |
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| CN (1) | CN212274594U (en) |
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- 2020-03-20 CN CN202020361386.XU patent/CN212274594U/en active Active
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