Graphite negative electrode particle closed-circuit granulation apparatus and method

Abstract

The present application belongs to the technical field of granulation, and discloses a graphite negative electrode particle closed-circuit cycle granulation device and method. The device comprises a granulation bin assembly for heating coke powder and solid pitch powder, which is fixed at the top of a cycle shaking arm assembly at the bottom, and the bottom of the cycle shaking arm assembly is rotatably arranged at the top of a granulator frame assembly. A granulation carrier disc assembly is vibrated at the bottom end inside the granulation bin assembly, and a closed-circuit cover assembly is snap-fitted at the top. The granulation bin assembly is driven to cycle shake by the cycle shaking arm assembly, so that the material is first shaken into a group. At the same time, the material is secondarily vibrated into a group by the vibration of the granulation carrier disc assembly. The two-stage granulation synergistically improves the uniformity of granulation. The granulation process is completed in a closed space, avoiding dust leakage and heat loss. After granulation, the granulation bin assembly is driven to rotate and dump by the granulator frame assembly, so that the material is quickly discharged.

Description

Technical Field

[0001] This invention belongs to the field of granulation technology, specifically relating to a closed-loop granulation device and method for graphite anode particles. Background Technology

[0002] Graphite anode materials are a crucial component of lithium-ion batteries, and their performance directly impacts battery capacity, cycle life, and safety. The preparation of graphite anode materials typically involves mixing coke powder and solid pitch powder in a specific ratio, then heating the mixture to melt the pitch and encapsulate the coke particles, forming composite particles with a defined particle size distribution and morphology—a process known as "granulation." This process significantly influences the subsequent compaction density and electrochemical performance of the anode material.

[0003] Currently, commonly used granulation equipment employs mechanical stirring, drum rotation, or airflow agitation to mix and agglomerate powder materials. However, existing technologies have the following problems in the granulation process: Poor granulation uniformity: Traditional equipment often relies on a single motion mode (such as single stirring or single rolling), which makes it difficult to achieve sufficient and uniform movement of materials in the granulation chamber. This results in some powders failing to form effective agglomerates or uneven particle size distribution, affecting the quality consistency of the final product.

[0004] Dust leakage and heat loss: Existing equipment is mostly open or semi-closed, which easily generates dust during feeding, granulation, and discharge, polluting the environment and causing material loss. At the same time, heat is easily lost during the heating process, resulting in high energy consumption.

[0005] Inconvenient discharge after granulation: After granulation, traditional granulation equipment usually requires manual or auxiliary equipment to remove the material, which is cumbersome, inefficient, and prone to granule breakage, affecting the yield of finished products.

[0006] Therefore, there is an urgent need to develop a graphite anode particle granulation equipment and method that can achieve uniform granulation, closed operation, and easy discharge, so as to improve granulation quality, production efficiency, and environmental performance. Summary of the Invention

[0007] To address the problems mentioned in the background art, the present invention provides a closed-loop circulating granulation device and method for graphite anode particles, including a granulation bin assembly, a circulating shaking arm assembly, a granulation frame assembly, a granulation carrier assembly, and a closed-loop cover assembly; the circulating shaking arm assembly achieves primary material agglomeration by shaking, the granulation carrier assembly achieves secondary material agglomeration by vibration, the closed-loop cover assembly achieves sealed granulation, and the granulation frame assembly achieves overall dumping and discharge after granulation.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a closed-circuit circulating granulation device for graphite negative electrode particles, comprising a granulation chamber assembly for heating coke powder and solid asphalt powder, wherein the bottom of the granulation chamber assembly is fixedly mounted on the top of a circulating swaying arm assembly, and the bottom of the circulating swaying arm assembly is rotatably mounted on the top of a granulation frame assembly. The rotation of the circulating swaying arm assembly on the top of the granulation frame assembly achieves circulating swaying granulation of the coke powder and solid asphalt powder within the granulation chamber assembly. A granulation carrier assembly is vibratingly mounted at the bottom of the granulation chamber assembly, achieving vibration granulation of the coke powder and solid asphalt powder within the granulation chamber assembly through the vibration of the granulation carrier assembly. A closed-circuit cover assembly is fastened to the top of the granulation chamber assembly, achieving sealed granulation within the granulation chamber assembly by fastening and sealing the top of the granulation chamber assembly. The rotation of the granulation chamber assembly on the circulating swaying arm assembly, driven by the granulation frame assembly, facilitates the unloading of the granulated material from the granulation chamber assembly.

[0009] Preferably, the granulator frame assembly includes a frame shaft arm, with side support legs rotatably mounted at both ends of the frame shaft arm. A first motor for driving the frame shaft arm to rotate is mounted on the top of one of the side support legs. A main connecting arm is fixedly mounted on the top of the frame shaft arm. A main ring platform of the frame is fixedly mounted on the top of the main connecting arm. A second motor is fixedly mounted on the bottom of the main ring platform of the frame.

[0010] Preferably, the circulating rocking arm assembly includes a top frame ring arm, and a plurality of supporting top arms are rotatably provided at the bottom of the top frame ring arm via bearings. A supporting cross arm is fixedly provided at the bottom of the supporting top arm, and a supporting bottom arm is fixedly provided at the bottom of the supporting cross arm at the end away from the supporting top arm. Two pulleys are fixedly provided on the supporting bottom arm, and belts are sleeved on the pulleys.

[0011] Preferably, the granulation chamber assembly includes a granulation chamber, a heating chamber sleeve and a cylinder are fixedly disposed on the outer wall of the granulation chamber, a heating rod is fixedly disposed inside the heating chamber sleeve, and a central seat groove and an edge sliding groove are provided at the bottom of the granulation chamber. The central seat groove is located at the center of the bottom of the granulation chamber, and the edge sliding groove is located at the edge of the bottom of the granulation chamber.

[0012] Preferably, the granulation carrier assembly includes a carrier disk, a vibration motor is fixedly installed at the center of the bottom of the carrier disk, and a guide slide is fixedly installed at the edge of the bottom of the carrier disk. A base frame end plate is fixedly installed at the bottom of the guide slide, and a first spring and a second spring are sleeved on the guide slide.

[0013] Preferably, the closed-loop cover assembly includes a bin cover, a conical cover is fixedly disposed on the top of the bin cover, a material pipe is fixedly disposed on the top of the conical cover, and a side support platform is fixedly disposed on one side of the conical cover.

[0014] Preferably, the bottom of the plurality of supporting arms is rotatably mounted on the main ring platform of the frame via bearings, the second motor drives one supporting arm to rotate, and the plurality of supporting arms are connected by pulleys and belts for transmission.

[0015] Preferably, the bottom of the granulation chamber is fixedly mounted on the top of the top frame ring arm, and the top of the cylinder is fixedly connected to the side support platform.

[0016] Preferably, the carrier plate slides up and down in the granulation chamber, the guide slide rod slides through the edge groove and penetrates the bottom of the granulation chamber, the vibration motor is located in the central seat groove, the top and bottom of the first spring abut against the carrier plate and the granulation chamber respectively, and the top and bottom of the second spring abut against the granulation chamber and the end platform of the base frame respectively.

[0017] A closed-loop granulation method for graphite anode particles includes the following steps: Step 1: Granulation and feeding stage. The closed-loop cover assembly is fastened to the top of the granulator frame assembly by the cylinder. The proportioned coke powder and solid asphalt powder are added into the granulation bin assembly through the material pipe. The coke powder and solid asphalt powder fall onto the granulation carrier plate assembly inside the granulation bin assembly. Step 2: Granulation and Homogenization Stage. The granulation bin assembly is driven by the cyclic shaking arm assembly to achieve primary material agglomeration through shaking. The material is then vibrated by the granulation carrier assembly to achieve secondary material agglomeration through vibration. Step 3: Granulation and discharge stage. The granulator frame assembly drives the granulation bin assembly to rotate and tilt, so that the granulated material in the granulation bin assembly is discharged through the closed-loop cover assembly.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. Excellent granulation uniformity and product consistency: The circulating swaying arm assembly drives the granulation bin assembly to oscillate in a circular motion, achieving primary agglomeration of the material; simultaneously, the vibration motor and spring structure of the granulation carrier assembly drive the carrier to vibrate up and down, achieving secondary agglomeration of the material. The synergistic effect of these two granulation methods ensures that coke powder and solid asphalt powder are fully mixed and uniformly coated under heating conditions, significantly improving the uniformity of granule formation and batch consistency of the product.

[0019] 2. Closed-loop granulation, environmentally friendly process with high yield: The closed-loop cover assembly is driven by a cylinder to engage with the top of the granulation chamber, forming a closed granulation space, preventing dust leakage and heat loss, and improving the operating environment. Simultaneously, after granulation, the material is discharged directly through the conical cover and feed pipe via the entire granulator frame assembly, achieving closed-loop circulation operation, reducing material loss, and increasing yield.

[0020] 3. Multifunctional, flexible operation, and high production efficiency: The equipment integrates heating, shaking, vibration, and discharge functions, eliminating the need to transfer materials during granulation and simplifying the process. After granulation, the first motor drives the overall frame arm to rotate, achieving rapid tilting and discharge with high efficiency. The compact overall structure and high degree of automation make it suitable for continuous production, significantly improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a perspective view of the granulator frame assembly of the present invention; Figure 4 This is a perspective view of the cyclic rocking arm assembly of the present invention; Figure 5 This is a cross-sectional view of the granulation chamber assembly of the present invention; Figure 6 This is a perspective view of the granulation carrier assembly of the present invention; Figure 7 This is a perspective view of the closed-circuit cover assembly of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 100, Granulator frame assembly; 101, Frame shaft arm; 102, Side support leg; 103, First motor; 104, Main ring platform of the frame; 105, Main connecting arm; 106, Second motor; 200, Circulating swaying arm assembly; 201, Support bottom arm; 202, Pulley; 203, Support cross arm; 204, Support top arm; 205, Top frame ring arm; 206, Belt; 300, Granulation bin assembly; 301. Granulation bin; 302. Cylinder; 303. Central seat groove; 304. Edge slide groove; 305. Heating bin sleeve; 400. Granulation carrier assembly; 401. Carrier disc; 402. Vibration motor; 403. First spring; 404. Guide slide rod; 405. Second spring; 406. Base frame end platform; 500. Closed-loop cover assembly; 501. Bin cover; 502. Conical cover; 503. Material pipe; 504. Side support platform. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-7As shown, this invention provides a closed-loop circulating granulation device for graphite negative electrode particles, including a granulation chamber assembly 300 for heating coke powder and solid asphalt powder. The bottom of the granulation chamber assembly 300 is fixedly mounted on top of a circulating swaying arm assembly 200, and the bottom of the circulating swaying arm assembly 200 is rotatably mounted on top of a granulator frame assembly 100. Through the rotation of the circulating swaying arm assembly 200 on top of the granulator frame assembly 100, the coke powder and solid asphalt powder are circulated and granulated within the granulation chamber assembly 300. The bottom of the granulation chamber assembly 300 vibrates... The granulation hopper assembly 300 is equipped with a granulation carrier plate assembly 400. Through the vibration of the granulation carrier plate assembly 400, the coke powder and solid asphalt powder in the granulation hopper assembly 300 are vibrated and granulated. A closed-loop cover assembly 500 is fastened to the top of the granulation hopper assembly 300. The closed-loop cover assembly 500 seals the top of the granulation hopper assembly 300, achieving sealed granulation inside the granulation hopper assembly 300. The rotation of the granulation hopper assembly 300 on the circulating swing arm assembly 200 is driven by the granulation frame assembly 100, realizing the unloading of the granulated material after the granulation of the granulation hopper assembly 300.

[0025] In a preferred embodiment, please refer to Figure 3 The granulator frame assembly 100 includes a frame shaft arm 101. Both ends of the frame shaft arm 101 are rotatably provided with side support legs 102. A first motor 103 for driving the frame shaft arm 101 to rotate is provided at the top of one side support leg 102. A main connecting arm 105 is fixedly provided at the top of the frame shaft arm 101. A frame main ring platform 104 is fixedly provided at the top of the main connecting arm 105. A second motor 106 is fixedly provided at the bottom of the frame main ring platform 104.

[0026] In a preferred embodiment, please refer to Figure 4 The circulating swing arm assembly 200 includes a top frame ring arm 205. Multiple supporting top arms 204 are rotatably mounted on the bottom of the top frame ring arm 205 via bearings. A supporting cross arm 203 is fixedly mounted on the bottom of the supporting top arm 204. A supporting bottom arm 201 is fixedly mounted on the bottom of the supporting cross arm 203 away from the supporting top arm 204. Two pulleys 202 are fixedly mounted on the supporting bottom arm 201. A belt 206 is sleeved on the pulleys 202. The bottoms of the multiple supporting bottom arms 201 are rotatably mounted on the main ring platform 104 of the frame via bearings. A second motor 106 drives one supporting bottom arm 201 to rotate. The multiple supporting bottom arms 201 are connected by transmission through the pulleys 202 and the belts 206.

[0027] In a preferred embodiment, please refer to Figure 5The granulation chamber assembly 300 includes a granulation chamber 301. A heating chamber sleeve 305 and a cylinder 302 are fixedly installed on the outer wall of the granulation chamber 301. A heating rod is fixedly installed inside the heating chamber sleeve 305. A central seat groove 303 and an edge sliding groove 304 are opened at the bottom of the granulation chamber 301. The central seat groove 303 is opened at the center of the bottom of the granulation chamber 301, and the edge sliding groove 304 is opened at the edge of the bottom of the granulation chamber 301. The bottom of the granulation chamber 301 is fixedly installed on the top of the top frame ring arm 205. The top of the cylinder 302 is fixedly connected to the side support platform 504.

[0028] In a preferred embodiment, please refer to Figure 6 The granulation carrier assembly 400 includes a carrier 401. A vibration motor 402 is fixedly installed at the center of the bottom of the carrier 401, and a guide slide rod 404 is fixedly installed at the edge of the bottom of the carrier 401. A base end platform 406 is fixedly installed at the bottom of the guide slide rod 404, and a first spring 403 and a second spring 405 are sleeved on the guide slide rod 404. The carrier 401 slides up and down in the granulation chamber 301. The guide slide rod 404 slides through the edge slide groove 304 and slides through the bottom of the granulation chamber 301. The vibration motor 402 is located in the center seat groove 303. The top and bottom of the first spring 403 abut against the carrier 401 and the granulation chamber 301, respectively. The top and bottom of the second spring 405 abut against the granulation chamber 301 and the base end platform 406, respectively.

[0029] In a preferred embodiment, please refer to Figure 7 The closed-loop cover assembly 500 includes a bin cover 501, a conical cover 502 fixedly disposed on the top of the bin cover 501, a material pipe 503 fixedly disposed on the top of the conical cover 502, and a side support platform 504 fixedly disposed on one side of the conical cover 502.

[0030] A closed-loop granulation method for graphite anode particles includes the following steps: Step 1: Granulation feeding stage. The closed-loop cover assembly 500 is fastened to the top of the granulator frame assembly 100 by the cylinder 302. The proportioned coke powder and solid asphalt powder are added into the granulation bin assembly 300 through the material pipe 503. The coke powder and solid asphalt powder fall onto the granulation carrier assembly 400 inside the granulation bin assembly 300. Step 2: Granulation and Homogenization Stage. The granulation bin assembly 300 is driven to circulate and shake through the circulating shaking arm assembly 200 to achieve primary shaking and agglomeration of the material. The material is then vibrated through the granulation carrier assembly 400 to achieve secondary vibration and agglomeration of the material. Step 3: Granulation and Discharge Stage. The granulator frame assembly 100 drives the granulation bin assembly 300 to rotate and tilt, allowing the granulated material in the granulation bin assembly 300 to be discharged through the closed-loop cover assembly 500. The working principle of this invention is as follows: In actual use, the cylinder 302 drives the closed-loop cover assembly 500 to engage with the granulation chamber assembly 300, forming a sealed granulation space within the granulation chamber assembly 300. At this time, coke powder and solid asphalt powder are added to the granulation chamber assembly 300 through the material pipe 503. The coke powder and solid asphalt powder fall onto the carrier plate 401. After the raw materials are added, the heating rod inside the heating chamber sleeve 305 heats the inside of the granulation chamber 301, causing the solid asphalt powder to melt and become sticky. It should be noted that the melted solid asphalt powder instantly coats the surface of the coke powder. Because the amount of asphalt is very small compared to coke, it will not turn the powder into a paste, but rather evenly coat each grain of "flour" with a layer of "caramel coating". The coke powder and solid asphalt powder added to the granulation chamber assembly 300 in this invention are adjusted in a certain proportion.

[0031] Based on the above, during granulation, the bottoms of multiple support arms 201 are rotatably mounted on the main ring platform 104 of the frame via bearings. A second motor 106 drives one support arm 201 to rotate. The multiple support arms 201 are connected by pulleys 202 and belts 206. The bottom of the granulation chamber 301 is fixedly mounted on the top of the top frame ring arm 205. In actual use, the second motor 106 drives one support arm 201 to rotate. Since the multiple support arms 201 are connected in series via pulleys 202 and belts 206... At this time, multiple supporting bottom arms 201 form a synchronous and unidirectional rotation structure. The multiple supporting bottom arms 201 drive multiple supporting horizontal arms 203 to rotate synchronously. The multiple supporting top arms 204 at the far end of the multiple supporting horizontal arms 203 drive the top frame ring arm 205 to sway in a circular motion. Since the granulation chamber 301 is fixed on the top frame ring arm 205, the granulation chamber assembly 300 sways in a circular motion. At this time, the coke powder and solid asphalt powder in the granulation chamber assembly 300 sway in a circular motion and agglomerate. Through the above process, circumferential swaying granulation is achieved.

[0032] Based on the above, in order to ensure the granulation quality of the granulation process within the granulation chamber assembly 300, a granulation carrier assembly 400 is provided at the bottom of the granulation chamber assembly 300. Specifically, the granulation carrier assembly 400 includes a carrier 401, a vibration motor 402 is fixedly installed at the center of the bottom of the carrier 401, and a guide slide rod 404 is fixedly installed at the edge of the bottom of the carrier 401. A base frame end platform 406 is fixedly installed at the bottom of the guide slide rod 404, and a first spring 403 and a second spring 405 are sleeved on the guide slide rod 404. The carrier 401 slides up and down within the granulation chamber 301. The guide slide rod 404 slides through the edge slide groove 304 and the bottom of the granulation chamber 301. The vibration motor 402 is located in the central seat groove 303. The top and bottom of the first spring 403 abut against the carrier plate 401 and the granulation chamber 301 respectively. The top and bottom of the second spring 405 abut against the granulation chamber 301 and the base frame end platform 406 respectively. In actual use, the vibration motor 402, the first spring 403 and the second spring 405 work together to realize the vibration of the carrier plate 401 in the granulation chamber 301. Through this structure, the coke powder and solid asphalt powder are vibrated and granulated into agglomerates.

[0033] Based on the above, the granulation bin assembly 300 is fixedly mounted on the circulating swaying arm assembly 200, which is located on top of the granulator frame assembly 100. After granulation is completed, the first motor 103 drives the frame shaft arm 101 to rotate, which in turn drives the granulation bin assembly 300 on the circulating swaying arm assembly 200 to rotate downward. At this time, the granulation bin assembly 300 faces downward, and the granulated material in the granulation bin assembly 300 falls into the closed-loop cover assembly 500 and is discharged through the conical cover 502 and the material pipe 503. In this way, the rapid discharge of granulated material is achieved.

[0034] Although embodiments of the 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 to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A closed-loop granulation device for graphite negative electrode particles, comprising a granulation chamber assembly (300) for heating coke powder and solid asphalt powder, characterized in that: The bottom of the granulation bin assembly (300) is fixedly mounted on top of the circulating swaying arm assembly (200), and the bottom of the circulating swaying arm assembly (200) is rotatably mounted on top of the granulator frame assembly (100). Through the rotation of the circulating swaying arm assembly (200) on top of the granulator frame assembly (100), the coke powder and solid asphalt powder inside the granulation bin assembly (300) are circulated and granulated. A granulation carrier assembly (400) is vibratingly mounted at the bottom of the granulation bin assembly (300). The granulation carrier assembly (400)... Vibration is used to achieve vibration granulation of coke powder and solid asphalt powder in the granulation silo assembly (300). A closed-loop cover assembly (500) is fastened to the top of the granulation silo assembly (300). The closed-loop cover assembly (500) seals the top of the granulation silo assembly (300) to achieve closed granulation inside the granulation silo assembly (300). The rotation of the granulation silo assembly (300) on the circulating swaying arm assembly (200) is driven by the granulation frame assembly (100) to achieve the unloading of the granulated material after the granulation of the granulation silo assembly (300).

2. The closed-loop circulating granulation equipment for graphite anode particles according to claim 1, characterized in that: The granulator frame assembly (100) includes a frame shaft arm (101), with side support legs (102) rotatably mounted at both ends of the frame shaft arm (101). A first motor (103) for driving the frame shaft arm (101) to rotate is mounted on the top of one of the side support legs (102). A main connecting arm (105) is fixedly mounted on the top of the frame shaft arm (101). A main ring platform (104) is fixedly mounted on the top of the main connecting arm (105). A second motor (106) is fixedly mounted on the bottom of the main ring platform (104).

3. The closed-loop circulating granulation equipment for graphite anode particles according to claim 1, characterized in that: The circulating rocking arm assembly (200) includes a top frame ring arm (205). The bottom of the top frame ring arm (205) is rotatably provided with multiple supporting top arms (204) via bearings. The bottom of the supporting top arms (204) is fixedly provided with a supporting cross arm (203). The bottom of the supporting cross arm (203) away from the supporting top arms (204) is fixedly provided with a supporting bottom arm (201). Two pulleys (202) are fixedly provided on the supporting bottom arm (201), and a belt (206) is sleeved on the pulleys (202).

4. The closed-loop circulating granulation equipment for graphite anode particles according to claim 1, characterized in that: The granulation chamber assembly (300) includes a granulation chamber (301). A heating chamber sleeve (305) and a cylinder (302) are fixedly installed on the outer wall of the granulation chamber (301). A heating rod is fixedly installed inside the heating chamber sleeve (305). A central seat groove (303) and an edge slide groove (304) are opened at the bottom of the granulation chamber (301). The central seat groove (303) is opened at the center of the bottom of the granulation chamber (301), and the edge slide groove (304) is opened at the edge of the bottom of the granulation chamber (301).

5. The closed-loop circulating granulation equipment for graphite anode particles according to claim 4, characterized in that: The granulation carrier assembly (400) includes a carrier (401), a vibration motor (402) is fixedly installed at the center of the bottom of the carrier (401), and a guide slide rod (404) is fixedly installed at the edge of the bottom of the carrier (401). A base frame end plate (406) is fixedly installed at the bottom of the guide slide rod (404), and a first spring (403) and a second spring (405) are sleeved on the guide slide rod (404).

6. The closed-loop circulating granulation equipment for graphite anode particles according to claim 4, characterized in that: The closed-loop cover assembly (500) includes a bin cover (501), a conical cover (502) is fixedly provided on the top of the bin cover (501), a material pipe (503) is fixedly provided on the top of the conical cover (502), and a side support platform (504) is fixedly provided on one side of the conical cover (502).

7. The closed-loop circulating granulation equipment for graphite anode particles according to claim 4, characterized in that: The bottom of the multiple support arms (201) is rotatably mounted on the main ring platform (104) of the frame via bearings. The second motor (106) drives one support arm (201) to rotate. The multiple support arms (201) are connected by a pulley (202) and a belt (206).

8. The closed-loop circulating granulation equipment for graphite anode particles according to claim 4, characterized in that: The bottom of the granulation chamber (301) is fixedly installed on the top of the top frame ring arm (205), and the top of the cylinder (302) is fixedly connected to the side support platform (504).

9. The closed-loop circulating granulation equipment for graphite anode particles according to claim 4, characterized in that: The carrier plate (401) slides up and down in the granulation chamber (301), the guide slide rod (404) slides through the edge slide groove (304) and the bottom of the granulation chamber (301), the vibration motor (402) is located in the center seat groove (303), the top and bottom of the first spring (403) abut against the carrier plate (401) and the granulation chamber (301) respectively, and the top and bottom of the second spring (405) abut against the granulation chamber (301) and the base frame end platform (406) respectively.

10. A closed-loop granulation method for graphite anode particles, implemented using the closed-loop granulation equipment for graphite anode particles as described in any one of claims 4-9, characterized in that: Includes the following steps: Step 1: Granulation feeding stage. The closed-loop cover assembly (500) is fastened to the top of the granulator frame assembly (100) by the cylinder (302). The proportioned coke powder and solid asphalt powder are added into the granulation bin assembly (300) through the material pipe (503). The coke powder and solid asphalt powder fall onto the granulation carrier assembly (400) inside the granulation bin assembly (300). Step 2: Granulation and Homogenization Stage. The granulation bin assembly (300) is driven to circulate and shake through the circulating shaking arm assembly (200) to achieve primary shaking and agglomeration of the material. The material is then vibrated through the granulation carrier assembly (400) to achieve secondary vibration and agglomeration of the material. Step 3: Granulation and discharge stage. The granulation chamber assembly (300) is rotated and tilted by the granulator frame assembly (100) so that the granulated material in the granulation chamber assembly (300) is discharged through the closed cover assembly (500).

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