Lithium battery positive electrode material sintering furnace

Abstract

The utility model belongs to the technical field of sintering furnaces, and relates to a lithium battery anode material sintering furnace which comprises a furnace body, two sides of the outer wall of the furnace body are respectively communicated with an air inlet pipe and an air outlet pipe, one side of the furnace body is respectively hinged with a material discharging furnace door and a material taking furnace door, and a heat insulation carrier plate is arranged at the middle end in the furnace body. A plurality of sets of discharging boxes are placed on the heat insulation carrying plate, and each set of discharging boxes is composed of a plurality of sets of rhombic box bodies. The stirring assemblies are used for stirring the interiors of the multiple sets of discharging boxes, the positions of raw materials in the discharging boxes are changed, the raw materials can make uniform contact with the inner walls of the discharging boxes, full mixing of the raw materials in the sintering process can be improved, and the sintering effect is improved; and due to the design of the rhombic box body of the discharging box, the contact area between the raw materials and the interior of the box body can be increased, so that the heat transfer efficiency is improved, the raw materials can reach the required sintering temperature more quickly, and the sintering time is shortened.

Description

Technical Field

[0001] This utility model belongs to the field of sintering furnace technology and relates to a sintering furnace for lithium battery cathode materials. Background Technology

[0002] The main function of the lithium battery cathode material sintering furnace is to sinter the raw materials of the cathode material at high temperature, so that it forms a cathode material with a specific crystal structure and microstructure. During the sintering process, the chemical reaction between the raw materials can be promoted to form stable compounds and improve the conductivity and electrochemical performance of the material.

[0003] For example, patent CN221649181U discloses a high-temperature sintering furnace for lithium battery cathode materials, including a device body. The device body includes a furnace body, a furnace door, a placement platform, and an exhaust pipe. An agitation component is fixedly installed at the top of the furnace body. The agitation component includes a mounting frame, which is fixedly installed at the top of the furnace body. The mounting frame is L-shaped, and a hydraulic cylinder is fixedly installed at the bottom of the mounting frame. The telescopic end of the hydraulic cylinder extends through the interior of the furnace body. This utility model, by incorporating an agitation component, achieves agitation during the heating process of the material at the top of the placement platform. Through the telescopic movement of the hydraulic cylinder, the placement platform and the material at the top of the placement platform are agitated, allowing the material to fully contact the heat source, shortening the heating time. Furthermore, the hydraulic cylinder is connected to the placement platform via a heat insulation column, which reduces heat conduction to the hydraulic cylinder and increases the service life of the device.

[0004] When using the above technology, the following technical problems were found in the existing technology: When sintering the raw materials, the hydraulic cylinder is intermittently controlled to extend and retract, so that the placement platform makes an up-and-down turbulent motion. Although this can change the placement position of the raw materials, this turbulent motion is mainly carried out in the vertical direction. Therefore, the change in the position of the raw materials is mainly in the vertical direction, while the change in the horizontal direction may be very limited. This can easily cause uneven heating of the raw materials during the sintering process, thereby affecting the sintering effect and product quality. Utility Model Content

[0005] The technical problem this invention aims to solve is that when sintering raw materials, the intermittent control of the extension and retraction of the hydraulic cylinder causes the placement platform to oscillate up and down. Although this can change the placement position of the raw materials, the oscillation motion is mainly carried out in the vertical direction. Therefore, the change in the position of the raw materials is mainly in the vertical direction, while the change in the horizontal direction may be very limited. This can easily cause uneven heating of the raw materials during the sintering process, thereby affecting the sintering effect and product quality.

[0006] The present invention discloses a lithium battery cathode material sintering furnace, comprising a furnace body, an air inlet pipe and an exhaust pipe respectively connected to both sides of the outer wall of the furnace body, a feeding furnace door and a receiving furnace door respectively hinged to one side of the furnace body, and a heat insulation plate provided in the middle of the interior of the furnace body, on which multiple sets of feeding boxes are placed, each set of feeding boxes being composed of multiple sets of rhomboid boxes.

[0007] The mixing assembly is located on the upper part of the heat-insulating carrier plate. The mixing assembly can be used to mix the contents of multiple discharge boxes.

[0008] The material discharge assembly is located at the bottom of the heat insulation carrier plate. Multiple sets of material discharge boxes can be controlled to discharge material simultaneously through the material discharge assembly.

[0009] The screening component is located below the discharge component and can screen the discharged raw materials.

[0010] The stirring assembly includes a first transmission gear, a first servo motor, a first driven gear, and a stirring rod. The first transmission gear is located at the center point of the outer wall of the top of the furnace body, and one end of it is connected to the output end of the first servo motor. The first driven gear is arranged around the edge of the outer wall of the top of the furnace body. Multiple sets of first driven gears are meshed with the first transmission gear. One end of the first driven gear is provided with a stirring rod, and one end of the stirring rod extends through the interior of the furnace body into the interior of the feeding box.

[0011] The material discharge assembly includes a discharge pipe, a valve, a second driven gear, a transmission rod, a second transmission gear, and a second servo motor. The discharge pipe is fixed to the lower surface of the heat insulation carrier plate and is connected to the discharge box. A valve is installed at one end of the discharge pipe. A second driven gear is provided at the handwheel position of the valve. A second servo motor is located at the center of the lower surface of the heat insulation carrier plate. The output end of the second servo motor is connected to a second transmission gear through a transmission rod. The second driven gear is meshed with multiple sets of second transmission gears.

[0012] The screening assembly includes a sieve plate, a first bevel gear, a forward and reverse lead screw, a second bevel gear, and a scraper. The sieve plate is located at the bottom of the furnace body. The forward and reverse lead screw is rotatably installed inside the furnace body. The two ends of the forward and reverse lead screw are connected to the scraper by lead screw nuts. The second bevel gear is located in the middle of the forward and reverse lead screw. The second bevel gear meshes with the first bevel gear. One end of the first bevel gear is fixedly connected to the second transmission gear.

[0013] The furnace body has discharge troughs on both sides of the bottom end. A guide plate is inclinedly connected to the side of the discharge trough near the bottom end of the furnace body. One end of the guide plate is connected to the end of the sieve plate. A collection box is installed on the outer wall of the furnace body.

[0014] A water tank is placed on one side of the furnace body. A flue is spirally coiled inside the water tank. Both ends of the flue penetrate the inside of the water tank. One end of the flue is connected to a connecting pipe, and the other end of the connecting pipe is connected to an exhaust pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by stirring the inside of multiple feeding boxes through the stirring component, the position of the raw material in the feeding box is changed, so that the raw material can be evenly contacted with the inner wall of the feeding box, and the full mixing of the raw material in the sintering process can be improved, thus improving the sintering effect. In addition, the diamond-shaped box design of the feeding box can increase the contact area between the raw material and the inside of the box, thereby improving the heat transfer efficiency, enabling the raw material to reach the required sintering temperature more quickly, and reducing the sintering time.

[0016] The material discharge assembly controls multiple sets of discharge boxes simultaneously to simplify the operation process and improve production efficiency. The discharged raw materials are screened by the screening assembly to ensure the purity and quality of the raw materials and improve product quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 This is an exploded view of this utility model.

[0020] Figure 4 This is a sectional view of the water tank of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the stirring rod of this utility model.

[0022] In the diagram: 1. Furnace body; 2. Air inlet pipe; 3. Exhaust pipe; 4. Feeding furnace door; 5. Retrieving furnace door; 6. Insulating carrier plate; 7. Feeding box; 8. First transmission gear; 9. First servo motor; 10. First driven gear; 11. Feeding pipe; 12. Valve; 13. Second driven gear; 14. Transmission rod; 15. Second transmission gear; 16. Second servo motor; 17. Screen plate; 18. First bevel gear; 19. Positive and negative lead screws; 20. Second bevel gear; 21. Scraper; 22. Discharge chute; 23. Guide plate; 24. Collection box; 25. Water tank; 26. Smoke pipe; 27. Connecting pipe; 28. Stirring rod. Detailed Implementation

[0023] Example 1

[0024] like Figures 1-5As shown, the furnace includes a furnace body 1, which is the main part of the sintering furnace. An inlet pipe 2 and an exhaust pipe 3 are connected to both sides of the outer wall of the furnace body 1. The inlet pipe 2 is used to introduce atmospheric gases, such as nitrogen, argon, or other inert gases, to control the chemical reaction environment inside the furnace. The exhaust pipe 3 is used to discharge waste gas. A feeding furnace door 4 and a receiving furnace door 5 are hinged to one side of the furnace body 1. The feeding furnace door 4 and the receiving furnace door 5 facilitate the loading and unloading of raw materials. A heat-insulating plate 6 is provided in the middle of the interior of the furnace body 1. The heat-insulating plate 6 is used to isolate and reduce heat transfer to the lower areas of the furnace body 1, such as the discharge assembly and screening assembly areas. Multiple sets of feeding boxes 7 are placed on the heat-insulating plate 6. The feeding boxes 7 are used to place raw materials. Each set of feeding boxes 7 consists of multiple sets of rhomboid boxes. The design of the rhomboid boxes increases the contact area between the raw materials and the interior of the boxes, thereby improving heat transfer efficiency, allowing the raw materials to reach the required sintering temperature more quickly, and reducing sintering time.

[0025] The stirring assembly is located on the upper part of the heat insulation carrier plate 6. The stirring assembly can stir the inside of multiple sets of feeding boxes 7. The stirring assembly is used to stir the inside of multiple sets of feeding boxes 7, change the position of the raw materials in the feeding boxes 7, so that the raw materials can be evenly contacted with the inner wall of the feeding boxes 7, and can improve the full mixing of the raw materials in the sintering process, thereby improving the sintering effect.

[0026] The material discharge assembly is located under the heat insulation carrier plate 6. The material discharge assembly can simultaneously control multiple sets of material discharge boxes 7 to discharge materials, thereby simplifying the operation process and improving production efficiency.

[0027] The screening component, located below the discharge component, can screen the discharged raw materials to ensure their purity and quality, thereby improving product quality.

[0028] During operation, raw materials are placed into multiple sets of feeding boxes 7 by opening the feeding furnace door 4. The multiple sets of feeding boxes 7 allow for the sintering of various raw materials. After closing the feeding furnace door 4, atmospheric gas is introduced into the furnace body 1 through the air inlet pipe 2, and the furnace body 1 is started for sintering. During the sintering process, the diamond-shaped box design of the feeding boxes 7 increases the contact area between the raw materials and the inside of the boxes, thereby improving heat transfer efficiency, allowing the raw materials to reach the required sintering temperature more quickly, and reducing sintering time. The stirring components stir the contents of the multiple sets of feeding boxes 7, changing the position of the raw materials in the feeding boxes 7, so that the raw materials can contact the inner wall of the feeding boxes 7 evenly, and improving the full mixing of the raw materials during the sintering process, thus improving the sintering effect. After sintering is completed, the discharge components simultaneously control the multiple sets of feeding boxes 7 to discharge materials, thereby simplifying the operation process and improving production efficiency. The discharged raw materials are screened by the screening components to ensure the purity and quality of the raw materials and improve product quality.

[0029] Example 2

[0030] like Figures 1-5 As shown, the stirring assembly includes a first transmission gear 8, a first servo motor 9, a first driven gear 10, and a stirring rod 28. The first transmission gear 8 is located at the center point of the top outer wall of the furnace body 1. The first transmission gear 8 transmits the rotational motion of the first servo motor 9 to multiple sets of first transmission gears 8. One end of the first transmission gear 8 is connected to the output end of the first servo motor 9. The first servo motor 9 provides a power source to drive the first transmission gear 8 to rotate. The first driven gear 10 is arranged around the edge of the top outer wall of the furnace body 1. Multiple sets of first driven gears 10 are meshed with the first transmission gear 8. The multiple sets of first driven gears 10 work together to transmit the rotational motion of the first transmission gear 8 to the stirring rod 28. One end of the first driven gear 10 is provided with a stirring rod 28. One end of the stirring rod 28 extends through the interior of the furnace body 1 into the interior of the feeding box 7. The stirring rod 28 is used to stir the interior of multiple feeding boxes 7, change the position of the raw materials in the feeding boxes 7, so that the raw materials can be evenly contacted with the inner wall of the feeding boxes 7, and improve the full mixing of the raw materials during the sintering process, thereby improving the sintering effect.

[0031] During operation, the first servo motor 9 drives the first transmission gear 8 to rotate. The first transmission gear 8 transmits the rotational motion of the first servo motor 9 to multiple sets of first transmission gears 8. At this time, multiple sets of first driven gears 10 work together to transmit the rotational motion of the first transmission gear 8 to the stirring rod 28, so that the stirring rod 28 stirs inside the feeding box 7, thereby improving the full mixing of raw materials during the sintering process and improving the sintering effect.

[0032] Example 3

[0033] like Figures 1-4 As shown, the discharge assembly includes a discharge pipe 11, a valve 12, a second driven gear 13, a transmission rod 14, a second transmission gear 15, and a second servo motor 16. The discharge pipe 11 is fixed to the lower surface of the heat insulation carrier plate 6, and its interior is connected to the discharge box 7. A valve 12 is installed at one end of the discharge pipe 11. The valve 12 is used to control the discharge of raw materials. A second driven gear 13 is provided at the handwheel position of the valve 12. The second driven gear 13 is used to drive the opening and closing of the valve 12. A second servo motor 16 is located at the center of the lower surface of the heat insulation carrier plate 6. The second servo motor 16 is used to provide a power source to drive the second transmission gear 15 to rotate. The output end of the second servo motor 16 is connected to the second transmission gear 15 through the transmission rod 14. The second transmission gear 15 is used to transmit the rotational motion of the second servo motor 16 to multiple sets of second driven gears 13. One end of the second driven gear 13 is connected to the output end of the first servo motor 9. The second driven gear 13 and the multiple sets of second transmission gears 15 are meshed.

[0034] During operation, when material discharge is required, the output of the second servo motor 16 drives the second transmission gear 15 to rotate. The second transmission gear 15 transmits the rotational motion of the second servo motor 16 to multiple sets of second driven gears 13. The second driven gears 13 drive multiple sets of valve handwheels 12 to rotate, thereby synchronously controlling the opening of multiple sets of discharge pipes 11. At this time, the raw materials located inside the multiple sets of discharge boxes 7 are continuously discharged through the discharge pipes 11, which simplifies the operation process and improves production efficiency.

[0035] Example 4

[0036] like Figures 1-4 As shown, the screening assembly includes a screen plate 17, a first bevel gear 18, a forward and reverse lead screw 19, a second bevel gear 20, and a scraper 21. The screen plate 17 is located at the bottom of the furnace body 1 and is used to screen the sintered raw materials. The forward and reverse lead screw 19 is rotatably mounted inside the furnace body 1. The screw nut pairs at both ends of the forward and reverse lead screw 19 are connected to the scraper 21. The scraper 21 is used to push the raw materials intercepted by the screen plate 17 and push the intercepted raw materials to both ends of the screen plate 17 to maintain the smoothness of the screening process. The second bevel gear 20 is located in the middle of the forward and reverse lead screw 19. The second bevel gear 20 is used to receive the rotational force transmitted by the first bevel gear 18 and drive the forward and reverse lead screw 19 to rotate. The second bevel gear 20 meshes with the first bevel gear 18. One end of the first bevel gear 18 is fixedly connected to the second transmission gear 15.

[0037] like Figures 1-4 As shown, discharge troughs 22 are provided on both sides of the bottom of the furnace body 1. A guide plate 23 is inclinedly connected to the side of the discharge trough 22 near the bottom of the furnace body 1. One end of the guide plate 23 is connected to the end of the screen plate 17. A collection box 24 is installed on the outer wall of the furnace body 1. The collection box 24 is used to collect the raw materials that fall off the screen plate 17 pushed by the scraper 21.

[0038] During operation, when the output end of the second servo motor 16 rotates, it drives the first bevel gear 18 to rotate synchronously through the second transmission gear 15. At this time, the first bevel gear 18 meshes and drives the second bevel gear 20 to rotate. At this time, the forward and reverse screws 19 drive the scrapers 21 at both ends to move away from each other, pushing the raw material intercepted by the screen plate 17 to both ends of the screen plate 17. After that, the raw material slides down into the collection box 24 through the inclined surface of the guide plate 23, so as to achieve centralized collection of the intercepted raw material to maintain the smoothness of the screen plate 17 during screening.

[0039] Example 5

[0040] like Figure 1 , Figure 4As shown, a water tank 25 is placed on one side of the furnace body 1. The water tank 25 is used to cool the flue gas in the flue pipe 26 and to recover the waste heat of the flue gas using the liquid inside the tank. The flue pipe 26 is spirally coiled inside the water tank 25. The spiral coiling of the flue pipe 26 can increase the travel of the flue gas in the water tank 25, thereby improving the recovery effect of the waste heat of the flue gas. Both ends of the flue pipe 26 pass through the inside of the water tank 25. One end of the flue pipe 26 is connected to a connecting pipe 27, and one end of the connecting pipe 27 is connected to the exhaust pipe 3.

[0041] During operation, the flue gas is discharged through the exhaust pipe 3 and guided into the flue pipe 26 through the connecting pipe 27. The waste heat of the flue gas is recovered and cooled by the liquid in the box, which facilitates the subsequent purification of the flue gas. At the same time, the spiral winding of the flue pipe 26 can increase the travel of the flue gas in the water tank 25, thereby improving the recovery effect of the waste heat of the flue gas.

[0042] The operation process of the lithium battery cathode material sintering furnace provided by this utility model is as follows: By opening the furnace door 4, raw materials are placed into multiple sets of feeding boxes 7. The multiple sets of feeding boxes 7 allow for the sintering of various different raw materials. The furnace door 4 is then closed, and atmospheric gas is introduced into the furnace body 1 through the air inlet pipe 2. The furnace body 1 is then started for sintering. During the sintering process, the diamond-shaped design of the feeding boxes 7 increases the contact area between the raw materials and the interior of the boxes, thereby improving heat transfer efficiency, allowing the raw materials to reach the required sintering temperature more quickly, and reducing sintering time. The stirring assembly stirs the contents of the multiple sets of feeding boxes 7, changing the position of the raw materials within the boxes, thus ensuring the raw materials... It can make uniform contact with the inner wall of the feeding box 7, and can improve the full mixing of raw materials during the sintering process, thereby improving the sintering effect. After sintering, multiple feeding boxes 7 are controlled simultaneously by the discharge component to discharge materials, thereby simplifying the operation process and improving production efficiency. The discharged raw materials are screened by the screening component to ensure the purity and quality of the raw materials and improve product quality. After the furnace is completed, the flue gas is discharged through the exhaust pipe 3 and guided to the inside of the flue pipe 26 through the connecting pipe 27. The waste heat of the flue gas is recovered through the liquid in the box, and the flue gas is cooled, which facilitates the subsequent purification of the flue gas. At the same time, the spiral winding of the flue pipe 26 can increase the stroke of the flue gas in the water tank 25 to improve the recovery effect of the waste heat of the flue gas.

[0043] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A sintering furnace for lithium battery cathode materials, characterized in that: The furnace includes a furnace body (1), with an air inlet pipe (2) and an exhaust pipe (3) connected to both sides of the outer wall of the furnace body (1). A feeding furnace door (4) and a taking furnace door (5) are hinged to one side of the furnace body (1). A heat insulation plate (6) is provided in the middle of the interior of the furnace body (1). Multiple sets of feeding boxes (7) are placed on the heat insulation plate (6), and each set of feeding boxes (7) is composed of multiple sets of diamond-shaped boxes. The stirring assembly is located on the upper part of the heat insulation plate (6). The stirring assembly can be used to stir the contents of multiple discharge boxes (7). The material discharge assembly is located at the bottom of the heat insulation carrier plate (6). Multiple material discharge boxes (7) can be controlled to discharge material simultaneously through the material discharge assembly. The screening component is located below the discharge component and can screen the discharged raw materials.

2. The lithium battery cathode material sintering furnace according to claim 1, characterized in that: The stirring assembly includes a first transmission gear (8), a first servo motor (9), a first driven gear (10), and a stirring rod (28). The first transmission gear (8) is located at the center point of the outer wall of the top of the furnace body (1), and one end of it is connected to the output end of the first servo motor (9). The first driven gear (10) is arranged around the edge of the outer wall of the top of the furnace body (1). Multiple sets of first driven gears (10) are meshed with the first transmission gear (8). One end of the first driven gear (10) is provided with a stirring rod (28). One end of the stirring rod (28) extends through the interior of the furnace body (1) to the interior of the feeding box (7).

3. The lithium battery cathode material sintering furnace according to claim 1, characterized in that: The discharge assembly includes a discharge pipe (11), a valve (12), a second driven gear (13), a transmission rod (14), a second transmission gear (15), and a second servo motor (16). The discharge pipe (11) is fixed to the lower surface of the heat insulation carrier plate (6), and its interior is connected to the discharge box (7). A valve (12) is installed at one end of the discharge pipe (11). A second driven gear (13) is provided at the handwheel position of the valve (12). A second servo motor (16) is provided at the center of the lower surface of the heat insulation carrier plate (6). The output end of the second servo motor (16) is connected to the second transmission gear (15) through the transmission rod (14). The second driven gear (13) and multiple sets of second transmission gears (15) are meshed.

4. A lithium battery cathode material sintering furnace according to claim 3, characterized in that: The screening assembly includes a sieve plate (17), a first bevel gear (18), a forward and reverse screw (19), a second bevel gear (20), and a scraper (21). The sieve plate (17) is located at the bottom of the furnace body (1). The forward and reverse screw (19) is rotatably mounted inside the furnace body (1). The screw and nut pairs at both ends of the forward and reverse screw (19) are connected to the scraper (21). The second bevel gear (20) is located in the middle of the forward and reverse screw (19). The second bevel gear (20) meshes with the first bevel gear (18). One end of the first bevel gear (18) is fixedly connected to the second transmission gear (15).

5. A lithium battery cathode material sintering furnace according to claim 4, characterized in that: The furnace body (1) has discharge troughs (22) on both sides of the bottom end. A guide plate (23) is inclinedly connected to the side of the discharge trough (22) near the bottom end of the furnace body (1). One end of the guide plate (23) is connected to the end of the sieve plate (17). A collection box (24) is installed on the outer wall of the furnace body (1).

6. A lithium battery cathode material sintering furnace according to claim 1, characterized in that: A water tank (25) is placed on one side of the furnace body (1). A flue (26) is spirally coiled inside the water tank (25). Both ends of the flue (26) penetrate the inside of the water tank (25). One end of the flue (26) is connected to a connecting pipe (27), and one end of the connecting pipe (27) is connected to an exhaust pipe (3).

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