Graphite crushing equipment

Abstract

The utility model provides graphite crushing equipment. The graphite crushing equipment comprises a crushing device and a ball-milling device, wherein the discharging end of the crushing device is communicated with the feeding end of the ball-milling device; the crushing device comprises a first shell, and a feeding hole is formed in the first shell; the second shell is arranged at the top end of the first shell, the second shell is communicated with the first shell, and a discharging opening is formed in the second shell; the crushing assembly is arranged in the cavity of the first shell and located in the lower space of the first shell, and the crushing assembly is rotatably arranged in the first shell, so that vortex generated by rotation of the crushing assembly faces the direction of the second shell, and part of materials can enter the second shell; and the second crushing assembly is rotatably arranged in the second shell, so that vortex generated by rotation of the second crushing assembly faces the direction of the discharge port, and the materials are discharged through the discharge port. The problems that in the prior art, the number of shaping devices is large, and the shaping yield is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of graphite processing, and more specifically, to a graphite crushing device. Background Technology

[0002] Lithium-ion batteries are favored by many new energy companies due to their excellent performance characteristics, such as high voltage output, high energy density, long cycle life, low self-discharge rate, and no memory effect. In the selection of anode materials, graphite materials, especially natural graphite, have become the mainstream choice for commercial lithium-ion batteries due to their high charge / discharge capacity, stable charge / discharge platform, abundant resources, and economical cost. After natural graphite is crushed and sphericalized, the electrochemical performance of the battery is improved. The spherical particles exhibit more uniform volume expansion and contraction during battery charge and discharge, helping to reduce material breakage and shedding, thereby improving the battery's cycle stability. Furthermore, when spherical graphite particles are used to fill the battery anode, the smaller gaps between the spherical particles increase the tap density, i.e., the graphite content per unit volume, thus increasing the battery capacity. Therefore, modifying natural graphite is crucial. Current technology involves primary crushing of natural flake graphite in a mechanical pulverizer, followed by cyclic grinding, shaping, and grading using multiple series-connected shaping and grading machines to produce spherical graphite. A common characteristic of this process is that natural graphite often requires multiple crushing, spheroidizing, and grading steps to achieve spherical shape, resulting in the generation of tailings, which account for nearly half of the total output. The yield of spherical graphite is only around 50%. The value of tailings differs significantly from that of spherical graphite. Furthermore, the increased number of machines, shaping time, and number of processes, along with increased power consumption, significantly raises costs. Utility Model Content

[0003] The main objective of this invention is to provide a graphite crushing device to solve the problems of a large number of shaping devices and low shaping yield in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a graphite pulverizing device includes a pulverizing device and a ball milling device, wherein the discharge end of the pulverizing device is connected to the feed end of the ball milling device; the pulverizing device includes a first housing with a feed inlet; a second housing at the top of the first housing, connected to the first housing, and having a discharge outlet; a pulverizing assembly disposed within the cavity of the first housing and located in the lower space of the first housing, rotatably disposed inside the first housing such that the vortex generated by the rotation of the pulverizing assembly is directed toward the second housing, allowing some material to enter the second housing; and a screening assembly disposed within the cavity of the second housing and located in the lower space of the second housing, rotatably disposed inside the second housing, with at least a portion of the screening assembly having a material passage hole, through which the second housing communicates with the first housing.

[0005] Furthermore, the crushing assembly includes a turntable rotatably disposed within a first housing; a crushing hammer disposed on the turntable, with one end of the crushing hammer extending toward the inner wall of the first housing, forming a crushing gap between the end of the crushing hammer toward the inner wall of the first housing and the inner wall; and a first driving member drivingly connected to the turntable.

[0006] Furthermore, there are multiple pulverizing hammers, and the multiple pulverizing hammers are spaced apart circumferentially along the turntable; and / or the extending direction of the pulverizing hammers has an angle with the radial direction of the turntable, or the pulverizing hammers extend radially along the turntable; and / or the pulverizing hammers are detachably connected to the turntable.

[0007] Furthermore, the first shell is cylindrical, and the size L1 of the crushing gap and the inner diameter L2 of the first shell satisfy the following condition: 0.046≤L1 / L2≤0.091.

[0008] Furthermore, at least a portion of the bottom end of the second housing extends into the first housing, and a communication port is provided on the side wall of a portion of the structure of the second housing located within the first housing, through which the first housing communicates with the second housing.

[0009] Furthermore, the discharge port is located on the side of the second housing and in the external space of the first housing.

[0010] Furthermore, the volume of the first shell is greater than the volume of the second shell; and / or both the first and second shells are cylindrical, and the diameter of the second shell is smaller than the diameter of the first shell.

[0011] Furthermore, the screening assembly includes a screening impeller and a second drive component. The screening impeller is disposed at the bottom end of the second housing and is rotatably connected to the second housing. A material passage hole is disposed on the screening impeller. The second drive component is drivenly connected to the screening impeller.

[0012] Furthermore, the bottom end of the second housing has a constricted portion, and the larger end of the constricted portion is located above the smaller end of the constricted portion.

[0013] Furthermore, the crushing device also includes a feeding assembly connected to the side wall of the first housing. The feeding assembly has a unidirectional conveying section to allow material and air to flow unidirectionally within the feeding assembly and enter the first housing.

[0014] Furthermore, the feeding component is positioned above the crushing component at the connection point with the first housing, and the distance between the feeding component and the crushing component in the height direction of the first housing is less than the distance between the feeding component and the top of the first housing.

[0015] Furthermore, the ball milling device includes: a ball milling device housing, the feed end of the ball milling device housing being connected to the discharge port, and the ball milling device housing having a grinding space inside; a liner plate, the liner plate being disposed on the inner side wall of the ball milling device housing; and a grinding disc, the grinding disc being rotatably disposed inside the ball milling device housing, with a grinding gap formed between the grinding disc and the liner plate.

[0016] Furthermore, a feeding port is provided on the shell of the ball mill device, and the feeding port is connected to the grinding space.

[0017] By applying the technical solution of this utility model, the following technical effects are achieved:

[0018] In operation, graphite enters the first housing through the feed inlet and falls onto the crushing component located in the lower space of the first housing. After being crushed by the crushing component, the smaller graphite particles enter the second housing, while the larger graphite particles continue to be crushed in the crushing component until they can enter the second housing through the material passage. After entering the second housing, the graphite is discharged from the discharge outlet and enters the ball mill for shaping. Through crushing and shaping, the entire production process generates no tail material, improving production efficiency. Compared with traditional processes, it also reduces the number of equipment and lowers costs. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0021] Figure 2 A schematic diagram of the pulverizing device of this application is shown;

[0022] Figure 3 A schematic diagram of the ball mill apparatus of this application is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Crushing device; 11. First housing; 111. Feed inlet; 12. Second housing; 121. Discharge outlet; 13. Crushing assembly; 131. Rotary disc; 132. Crushing hammer; 133. First drive component; 14. Screening assembly; 141. Screening impeller; 142. Second drive component; 143. Through hole; 15. Feeding assembly; 20. Ball mill device; 21. Ball mill device housing; 22. Liner; 23. Crushing disc; 24. Feed port. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] See Figures 1 to 3 The graphite crushing equipment includes a crushing device 10 and a ball milling device 20. The discharge end of the crushing device 10 is connected to the feed end of the ball milling device 20. The crushing device 10 includes a first housing 11, a second housing 12, a crushing assembly 13, and a screening assembly 14. The first housing 11 is provided with a feed inlet 111. The second housing 12 is located at the top of the first housing 11 and is connected to the first housing 11. The second housing 12 has a discharge outlet 121. The crushing assembly 13 is located inside the cavity of the first housing 11 and is positioned within the first housing. In the lower space of the first housing 11, the crushing component 13 is rotatably disposed inside the first housing 11 so that the vortex generated by the rotation of the crushing component 13 is directed toward the second housing 12, so that some material can enter the second housing 12. The screening component 14 is disposed in the cavity of the second housing 12 and located in the lower space of the second housing 12. The screening component 14 is rotatably disposed inside the second housing 12. At least part of the screening component 14 is provided with a material passage hole 143. The second housing 12 communicates with the first housing 11 through the material passage hole 143.

[0029] In use, graphite enters the first housing 11 through the feed inlet 111 and falls onto the crushing component 13 located in the lower space of the first housing 11. After being crushed by the crushing component 13, the smaller graphite particles enter the second housing 12, while the larger graphite particles continue to be crushed in the crushing component 13 until they can enter the second housing through the material passage 143. After entering the second housing, the graphite is discharged from the discharge outlet 121 and enters the ball mill 20 for shaping. Through crushing and shaping, the entire production process generates no tail material, improving production efficiency. Compared with traditional processes, it reduces the number of equipment and lowers costs.

[0030] When the crushing component 13 is working, the rotation of the turntable 131 generates centrifugal force. Graphite particles are subjected to centrifugal force due to the high-speed rotation of the turntable 131, forming vortices. These vortices throw the crushed graphite particles toward the inner wall of the first housing 11, forming a circulating flow within the first housing 11. At the same time, the screening component in the second housing 12 also generates vortices due to rotation. Utilizing the upward force and negative pressure effect generated by the vortices, the graphite particles are screened. Qualified graphite particles are conveyed to the discharge port 121 through the material passage 143 of the screening component 14, while those graphite particles that do not reach the required particle size, due to their larger mass and particle size, fail to pass through the material passage 143 of the screening component and remain in the first housing 11 to continue being crushed until they reach the required particle size.

[0031] In this application, the crushing assembly 13 includes a turntable 131, a crushing hammer 132, and a first driving member 133. The turntable 131 is rotatably disposed inside the first housing 11. The crushing hammer 132 is disposed on the turntable 131, and one end of the crushing hammer 132 extends toward the inner wall of the first housing 11. A crushing gap is formed between the end of the crushing hammer 132 toward the inner wall of the first housing 11 and the inner wall. The first driving member 133 is drivenly connected to the turntable 131.

[0032] Specifically, during its rotation, the crushing hammer 132 crushes the graphite particles that enter the crushing gap. Simultaneously, the rotation of the crushing hammer 132 and the rotating disk 131 generates vortices. Under the combined action of these air vortices and centrifugal force, the graphite particles collide with each other and undergo shearing and grinding between the hammerheads of the hammer disk and the liner of the crushing assembly, achieving ultra-fine crushing of the material and improving the crushing effect on the graphite particles.

[0033] During the crushing process, smaller graphite particles enter the second housing 12, while larger graphite particles remain in the crushing component 13 for further crushing until they can enter the second housing 12.

[0034] In this application, there are multiple crushing hammers 132, and the multiple crushing hammers 132 are arranged at intervals along the circumference of the turntable 131. By setting multiple crushing hammers 132, the crushing effect on graphite particles can be improved.

[0035] In this application, the extending direction of the crushing hammer 132 forms an angle with the radial direction of the turntable 131, or the crushing hammer 132 extends radially along the turntable 131. By forming an angle between the extending direction of the crushing hammer 132 and the radial direction of the turntable 131, graphite particles are facilitated to enter the crushing space as the crushing hammer 132 rotates with the turntable 131.

[0036] In this application, the crusher 132 and the turntable 131 are detachably connected. This detachable connection facilitates the replacement and maintenance of the crusher 132.

[0037] In this application, the first housing 11 is cylindrical, and the size L1 of the crushing gap and the inner diameter L2 of the first housing 11 satisfy the following condition: 0.046≤L1 / L2≤0.091.

[0038] In this application, at least a portion of the bottom end of the second housing 12 extends into the first housing 11, and a communication port is provided on the side wall of a portion of the structure of the second housing 12 located within the first housing 11, through which the first housing 11 communicates with the second housing 12. Specifically, by providing the communication port, it is convenient for the pulverized graphite inside the first housing 11 to enter the second housing 12.

[0039] In this application, the discharge port 121 is located on the side of the second housing 12, and the discharge port 121 is located in the external space of the first housing 11. To facilitate the rotation of the screening assembly 14, the drive component of the screening assembly 14 is located at the top of the second housing 12. If the discharge port 121 were located at the top of the second housing 12, it would interfere with the drive component located at the top, affecting the discharge. Therefore, to avoid interference between the drive component and the discharge port 121, the discharge port 121 is located on the side of the second housing 12.

[0040] In this application, the volume of the first shell 11 is greater than the volume of the second shell 12, both the first shell 11 and the second shell 12 are cylindrical, and the diameter of the second shell 12 is smaller than the diameter of the first shell 11.

[0041] The volume of the first housing 11 is larger than that of the second housing 12, which facilitates the mutual arrangement between the first housing 11 and the second housing 12. In order to improve the efficiency of the crushing assembly 13 and the screening assembly 14 and the stability of crushing, the first housing 11 and the second housing 12 are configured as cylindrical.

[0042] In this application, the screening assembly 14 includes a screening impeller 141 and a second drive member 142. The screening impeller 141 is disposed at the bottom end of the second housing 12 and is rotatably connected to the second housing 12. A material passage hole 143 is disposed on the screening impeller 141. The second drive member 142 is drivenly connected to the screening impeller 141.

[0043] Specifically, the graphite pulverized in the first housing 11 needs to enter the second housing 12 through the material passage hole 143 on the screening assembly 14. Since the material passage hole 143 is set on the screening impeller 141, and the screening impeller 141 rotates during operation, the smaller the graphite particles, the easier it is to pass through the screening impeller 141. Therefore, only when the graphite particles are small enough can they pass through the rotating screening impeller 141 to achieve the screening of graphite particles.

[0044] The screening component in the second housing 12 also generates eddies due to rotation. The upward force and negative pressure effect generated by the eddies are used to screen the graphite particles. Qualified graphite particles are conveyed to the discharge port 121 through the material passage 143 of the screening component 14. Graphite particles that do not reach the required particle size fail to pass through the material passage 143 of the screening component due to their large mass and particle size. Therefore, they remain in the first housing 11 to continue to be crushed until they reach the required particle size.

[0045] Preferably, there are multiple through holes 143, spaced apart along the circumference of the screening impeller 141, to increase the chance of graphite particles passing through the through holes 143 and improve efficiency.

[0046] In this application, the bottom end of the second housing 12 has a constricted portion, and the larger end of the constricted portion is located above the smaller end of the constricted portion. When graphite particles come into contact with the inner wall of the constricted portion, the graphite particles will slide down along the inner wall of the constricted portion, facilitating the recovery of graphite within the second housing 12.

[0047] In this application, the crushing device 10 also includes a feeding assembly 15, which is connected to the side wall of the first housing 11. The feeding assembly 15 has a unidirectional conveying section to allow material and air to flow unidirectionally within the feeding assembly 15 and enter the first housing 11.

[0048] Specifically, by configuring the feeding assembly 15 in a unidirectional conveying manner, graphite can be prevented from escaping from the feed inlet 111, thus avoiding waste of graphite raw materials. Preferably, the feeding assembly 15 is a screw feeder. The feeding assembly 15 communicates with the first housing 11 through the feed inlet 111.

[0049] In this application, the feeding component 15 is connected to the first housing 11 above the crushing component 13, and the distance between the feeding component 15 and the crushing component 13 in the height direction of the first housing 11 is less than the distance between the feeding component 15 and the top of the first housing 11.

[0050] Specifically, in order to allow the graphite to spread out as much as possible within the first housing 11, the feeding assembly 15 is positioned above the first housing 11 to increase the graphite's falling stroke.

[0051] See Figure 3 The ball milling device 20 includes a ball milling device 20 housing, a liner 22, and a grinding disc 23. The feed end of the ball milling device 20 housing is connected to the discharge port 121. The ball milling device 20 housing has a grinding space inside. The liner 22 is disposed on the inner side wall of the ball milling device 20 housing. The grinding disc 23 is rotatably disposed inside the ball milling device 20 housing, and a grinding gap is formed between the grinding disc 23 and the liner 22.

[0052] In this application, the ball mill device 20 has a feeding port 24 on its housing, and the feeding port 24 is connected to the grinding space.

[0053] The pulverized material enters the ball mill 20, with a feeding port 24 at which binder and tap water are added in a 5:1 mass ratio. The material is slowly added at a shaping frequency of 5 Hz. After complete addition, the shaping frequency is adjusted to 45 Hz. During operation, the liner 22 and grinding disc 23 rotate at high speed, causing the material to flow in a three-dimensional manner. Impact, compression, and shear forces from the liner 22, grinding disc 23, grinding media, and between particles continuously act on the material, achieving the effect of removing sharp edges through friction. Simultaneously, the addition of binder causes the micro-powder to adhere to each other and form spheres during rotation, achieving both densification and spheroidization through granulation / composite effects. Furthermore, the grinding media can be rotated to a certain height along with the liner 22 installed on the main body of the cylinder, and then fall due to its own gravity. The kinetic energy generated by the falling grinding media can crush the material inside the main body of the cylinder. At the same time, the grinding material and the grinding media rub against each other during their mutual movement, which can also grind the grinding material. Moreover, the presence of the grinding media prevents the material from agglomerating excessively due to the addition of binders.

[0054] The system employs a graded crushing process, continuously crushing large particles within the system, maximizing the utilization of these particles. Compared to existing market processes, this significantly improves material utilization, achieving a full recovery rate.

[0055] The process of circulating and crushing large particles is adopted to circulate and crush large particles that are difficult to crush. The particle size can be controlled by time, and it also has the ability to narrow the particle size and a certain shaping effect, which lays a good foundation for subsequent shaping processes.

[0056] By employing different shaping processes, ball milling and granulation integrated ball milling equipment utilizes the cohesive adhesion between fine powders and the binding force of binders, as well as external forces causing collisions, extrusion, and compression. Through granulation / composite effects, it simultaneously densifies and spheroidizes small particles and micro powders. For large particles, since the adhesion force is not as strong as that of micro powders, water is used as a binder. Through the continuous action of impact, compression, and shear forces between the rotating disc 131, the inner wall, the particles, and the binder on the material, large particles cannot form agglomerates. The powder indicators can be controlled by adjusting the type and proportion of binder and shaping parameters, and the indicators are highly adjustable.

[0057] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0058] 1. During operation, graphite enters the first housing 11 through the feed inlet 111 and falls onto the crushing assembly 13 located in the lower space of the first housing 11. After being crushed by the crushing assembly 13, the smaller graphite particles enter the second housing 12, while the larger graphite particles remain in the crushing assembly 13 for further crushing until they can enter the second housing 12. Once inside the second housing 12, the graphite undergoes further crushing. The larger graphite particles remain in the second housing 12 for further crushing, while the smaller graphite particles exit from the discharge outlet 121 and enter the ball mill 20 for shaping. Through two crushing and shaping processes, the entire production process generates no waste material, improving production efficiency. Compared to traditional processes, it also reduces the number of equipment and lowers costs.

[0059] 2. During rotation, the crushing hammer 132 crushes the graphite particles that enter the crushing gap. At the same time, the crushing hammer 132 and the rotating disk 131 generate eddies during rotation. Under the dual action of air eddies and centrifugal force, the graphite particles collide with each other and are sheared and ground between the hammer head and the liner plate 22 of the hammer disk, achieving ultra-fine crushing of the material and improving the crushing effect of graphite particles.

[0060] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A graphite pulverizing device, characterized in that, It includes a crushing device (10) and a ball milling device (20), wherein the discharge end of the crushing device (10) is connected to the feed end of the ball milling device (20); the crushing device (10) includes: A first housing (11) is provided with a feed inlet (111); The second housing (12) is partially disposed at the top of the first housing (11), and the second housing (12) is in communication with the first housing (11). The second housing (12) has a discharge port (121). The crushing component (13) is disposed in the cavity of the first housing (11) and located in the lower space of the first housing (11). The crushing component (13) is rotatably disposed inside the first housing (11) so that the vortex generated by the rotation of the crushing component (13) is directed toward the second housing (12), so that some material can enter the second housing (12). A screening component (14) is disposed in the cavity of the second housing (12) and located in the lower space of the second housing (12). The screening component (14) is rotatably disposed inside the second housing (12). At least part of the screening component (14) is provided with a material passage hole (143). The second housing (12) is connected to the first housing (11) through the material passage hole (143).

2. The graphite crushing equipment according to claim 1, characterized in that, The crushing component (13) includes: A turntable (131) is rotatably disposed within the first housing (11); A crushing hammer (132) is disposed on the turntable (131), and one end of the crushing hammer (132) extends toward the inner wall of the first housing (11), and a crushing gap is formed between the end of the crushing hammer (132) toward the inner wall of the first housing (11) and the inner wall. A first driving element (133) is drivingly connected to the turntable (131).

3. The graphite crushing equipment according to claim 2, characterized in that, The number of the crushing hammers (132) is multiple, and the multiple crushing hammers (132) are arranged at circumferential intervals along the turntable (131); and / or The extending direction of the crushing hammer (132) forms an angle with the radial direction of the turntable (131), or the crushing hammer (132) extends radially along the turntable (131); and / or The crushing hammer (132) and the turntable (131) are detachably connected.

4. The graphite crushing equipment according to claim 2, characterized in that, The first housing (11) is cylindrical, and the size L1 of the crushing gap and the inner diameter L2 of the first housing (11) satisfy the following condition: 0.046≤L1 / L2≤0.

091.

5. The graphite crushing equipment according to claim 1, characterized in that, At least a portion of the bottom end of the second housing (12) extends into the first housing (11), and a communication port is provided on the side wall of a portion of the structure of the second housing (12) located inside the first housing (11), through which the first housing (11) communicates with the second housing (12).

6. The graphite crushing equipment according to claim 1, characterized in that, The discharge port (121) is located on the side of the second housing (12), and the discharge port (121) is located in the external space of the first housing (11) and / or The crushing device (10) further includes a feeding assembly (15), which is connected to the side wall of the first housing (11). The feeding assembly (15) has a unidirectional conveying section to allow material and air to flow unidirectionally within the feeding assembly (15) and enter the first housing (11).

7. The graphite crushing equipment according to claim 1, characterized in that, The volume of the first housing (11) is greater than the volume of the second housing (12); and / or Both the first shell (11) and the second shell (12) are cylindrical, and the diameter of the second shell (12) is smaller than the diameter of the first shell (11); and / or The bottom end of the second housing (12) has a constricted portion, and the larger end of the constricted portion is located above the smaller end of the constricted portion.

8. The graphite crushing equipment according to claim 1, characterized in that, The The screening component (14) includes: Screening impeller (141), the screening impeller (141) is disposed at the bottom end of the second housing, the screening impeller (141) is rotatably connected to the second housing (12), and the material passage hole (143) is disposed on the side wall of the screening impeller (141); The second drive unit (142) is drivenly connected to the screening impeller (141).

9. The graphite crushing equipment according to any one of claims 1 to 8, characterized in that, The ball milling apparatus (20) includes: The ball mill device (20) housing has a feed end connected to the discharge port (121) and a grinding space inside the ball mill device (20) housing. Liner plate (22), the liner plate (22) is disposed on the inner side wall of the housing of the ball mill device (20); A grinding disc (23) is rotatably disposed inside the housing of the ball mill (20), and a grinding gap is formed between the grinding disc (23) and the liner (22).

10. The graphite crushing equipment according to claim 9, characterized in that, The ball mill device (20) has a feeding port (24) on its housing, and the feeding port (24) is connected to the grinding space.

Images