A ball mill discharge device and a ball mill

Abstract

This invention relates to the field of ball mill technology, and in particular to a ball mill discharge device and a ball mill, including a circulation processing mechanism. The circulation processing mechanism includes a discharge hood, a lifting component, and a return component. The return component includes a feeding component and a feeding component located directly below the discharge port of the feeding component. After ball milling, the material is screened by the discharge hood to separate large particles. The large particles are conveyed to the inclined lower end of the lifting component through a second guide platform. The lifting component lifts the material and transfers it to the feeding component at its upper end. The feeding component includes a collection hopper with a discharge port on its bottom surface. A U-shaped limiting plate is fixed on the bottom surface of the collection hopper at the discharge port position. The feeding component is slidably sleeved in the U-shaped limiting plate. This ball mill can automatically return incompletely crushed material for secondary crushing. The overall crushing effect of the ball mill is good, and it can effectively reduce the labor intensity of workers.

Description

Technical Field

[0001] This invention relates to the field of ball mill technology, and more particularly to a ball mill discharge device and a ball mill. Background Technology

[0002] A ball mill is a common material crushing device. It uses a certain number of steel balls as grinding media, which are loaded into the cylinder. When the cylinder rotates, the steel balls are carried to a high position due to centrifugal force and friction. Then, due to the decrease in friction, they are thrown down and hit the material on the bottom wall of the cylinder, thereby crushing it.

[0003] For example, existing published documents CN117816307B - A ball mill and CN203076028U - A ball mill discharge device both disclose a ball mill and related supporting equipment for crushing and grinding materials. Although existing ball mills can achieve conventional crushing and grinding of materials, they still have the following shortcomings in actual use:

[0004] 1. The particle size of the material discharged after the existing ball mill is large. Some of the crushed material is still not suitable for subsequent use. It is necessary for the staff to screen the material again and then return the screened material to the ball mill for secondary processing. The whole process requires manual operation and is labor-intensive.

[0005] 2. The existing ball mill liner is a relatively smooth curved surface. The steel balls and materials move mainly through inertia inside. After the materials and steel balls move to the top of the cylinder, they fall automatically by gravity. During the entire movement process, the movement trajectory of the materials and steel balls does not change much. This makes it impossible to achieve rapid and thorough crushing of materials, resulting in poor overall practicality.

[0006] Therefore, it is necessary to improve the existing technology to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0008] In view of the problem that existing ball mills require manual re-grinding of substandard materials after material crushing, a ball mill discharge device is proposed.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a ball mill discharge device, comprising a circulation processing mechanism, the circulation processing mechanism including a discharge hood, a lifting component, and a return component, the return component including a feeding component and a feeding component located directly below the discharge port of the feeding component, the material after ball milling is screened by the discharge hood to separate large particles, the large particles are conveyed to the inclined lower end of the lifting component by a second guide platform, the lifting component lifts the material and transfers it to the feeding component at the upper end of the lifting component; The material assembly includes a hopper with a discharge port on its bottom surface. A U-shaped limiting plate is fixedly installed on the bottom surface of the hopper at the discharge port. The feeding assembly is slidably sleeved in the U-shaped limiting plate. The feeding assembly includes a second conveyor belt, a second outer protective frame, and a T-shaped guide rod. The second outer protective frame is located outside the second conveyor belt. The T-shaped guide rod is located below the second conveyor belt along the conveying direction of the second conveyor belt, and one end of the T-shaped guide rod is fixedly connected to the second outer protective frame. A limiting groove for clearance fit of the T-shaped guide rod is provided on the U-shaped limiting plate.

[0010] The beneficial effects of this invention are as follows: When the ball mill discharge device is in use, the discharge hood will screen the material after it has been crushed by the ball mill. The large particles that do not meet the standards after screening will fall onto the lifting component through the second guide platform. The lifting component will transport the material to the collection hopper. Then, the material discharged from the discharge port of the collection hopper will be transported back to the ball mill through the feeding component. In this way, the large particles that do not meet the standards will be re-ground. The overall automation level is high, which effectively reduces the labor intensity of the workers and makes it practical.

[0011] As a preferred embodiment of the ball mill discharge device of the present invention, the lifting assembly includes a first conveyor belt, a first outer protective frame, and a second guide platform. The first outer protective frame is located outside the first conveyor belt. First rollers are slidably sleeved on the inner sides of both ends of the first conveyor belt, and a first rotating shaft is fixedly sleeved in the first roller. Both ends of the first rotating shaft are rotatably connected to the first outer protective frame through rolling bearings. One end of one of the first rotating shafts extends to the outside of the first outer protective frame and is embedded in the output end of a first motor, and the first motor is fixedly connected to the first outer protective frame.

[0012] As a preferred embodiment of the ball mill discharge device of the present invention, one end of the second guide platform is fixedly disposed on one side of the inclined lower end of the first outer protective frame, and a protective frame is provided above the first conveyor belt at the position of the second guide platform, and the protective frame is fixedly connected to the top surface of the first outer protective frame.

[0013] As a preferred embodiment of the ball mill discharge device of the present invention, the discharge hood is integrally formed by two cylindrical cylinders at both ends and a frustum cylinder connected between the two cylinders, and the side wall of the discharge hood at the frustum cylinder is fixedly provided with screen holes in a circumferential array, and the inclined upper end of the second guide platform is located below the large diameter cylindrical cylinder.

[0014] As a preferred embodiment of the ball mill discharge device of the present invention, the inner bottom surface of the collecting hopper is configured as an inclined surface that gathers material towards the discharge port.

[0015] As a preferred embodiment of the ball mill discharge device of the present invention, wherein: a second roller is slidably sleeved on the inner side of both ends of the second conveyor belt, a second rotating shaft is fixedly sleeved in the second roller, and both ends of the second rotating shaft are rotatably connected to the second outer protective frame through rolling bearings; one end of one of the second rotating shafts extends to the outer side of the second outer protective frame and is embedded in the output end of the second motor, and the second motor is fixedly connected to the second outer protective frame.

[0016] In view of the problems of low material crushing rate and poor practicality of existing ball mills, the present invention also provides the following technical solution: a ball mill, including a ball mill discharge device; and a ball milling mechanism, including a ball mill cylinder, a discharge cylinder fixed on one end plate of the ball mill cylinder and a feed cylinder fixed on the other end plate of the ball mill cylinder, wherein 2n inner liner plates are fixedly arranged in a circumferential array on the inner side wall of the feed cylinder, wherein multiple protrusions are fixedly arranged in a long side direction on the inner side wall of each of the n inner liner plates, and the n inner liner plates with protrusions and the other n inner liner plates are arranged alternately.

[0017] Another beneficial effect of the present invention is that, when the ball mill is in use, by setting up protruding blocks and alternating between n inner liner plates with protruding blocks and another n inner liner plates, the movement trajectory of some steel balls and materials can be changed in actual use. In this way, the overall structural distribution of materials inside the ball mill can be changed during crushing, thereby improving the crushing effect and making it highly practical.

[0018] In a preferred embodiment of the ball mill of the present invention, one end of the small-diameter cylindrical part of the discharge hood is fixed on the free end of the discharge cylinder, and a first guide platform is provided below the position of the truncated cylindrical part of the discharge hood.

[0019] In a preferred embodiment of the ball mill of the present invention, the feeding assembly is disposed at one end of the feeding cylinder. During the circulating ball milling, the feeding assembly is moved relative to the discharging assembly so that one end of the feeding assembly extends into the feeding cylinder. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of a ball mill.

[0022] Figure 2 For the present invention Figure 1 Rear view of the structure.

[0023] Figure 3 For the present invention Figure 2 Right view of the structure.

[0024] Figure 4 This is a schematic diagram of the overall structure of the lifting component in this invention.

[0025] Figure 5 This is a schematic diagram of the overall structure of the material recycling component in this invention.

[0026] Figure 6 This is a vertical cross-sectional view of the material return assembly in this invention.

[0027] Figure 7 For the present invention Figure 1 Diagram showing the separation of the feed assembly and the feed cylinder.

[0028] Figure 8 This is a schematic diagram showing the cooperation between the ball mill mechanism and the discharge hood in this invention.

[0029] Figure 9 For the present invention Figure 8 A schematic diagram of the internal structure of the ball mill cylinder.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 100. Circulation processing mechanism; 200. Ball mill mechanism; 101. Discharge hood; 102. Lifting assembly; 103. Return assembly; 201. Ball mill cylinder; 202. Discharge cylinder; 203. First guide platform; 204. Feed cylinder; 101a. Screen hole; 102a. First conveyor belt; 102b. First outer protective frame; 102c. Second guide platform; 102a-1. First rotating shaft; 102a-2. First motor; 102b-1. Protective frame; 1 03a, Feeding assembly; 103b, Feeding assembly; 103a-1, Collecting hopper; 103a-2, U-shaped limiting plate; 103a-3, Limiting groove; 103a-4, Inclined surface; 103a-5, Discharge port; 103b-1, Second conveyor belt; 103b-2, Second outer protective frame; 103b-3, T-shaped guide rod; 103b-4, Second rotating shaft; 103b-5, Second motor; 201a, Inner liner plate; 201a-1, Protruding block. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] Example 1

[0037] Reference Figure 1 , Figure 2 and Figure 3 This is the first embodiment of the present invention. This embodiment provides a ball mill discharge device, which can automatically recover, transfer and return substandard large particles after ball milling to the ball mill mechanism 200 for further ball milling.

[0038] Specifically, it includes a recycling processing mechanism 100, which includes a discharge hood 101, a lifting component 102, and a return component 103. The return component 103 includes a feeding component 103a and a feeding component 103b located directly below the discharge port 103a-5 of the feeding component 103a. After ball milling, the material is screened out by the discharge hood 101 to remove large particles. The large particles are then conveyed to the inclined lower end of the lifting component 102 via the second guide platform 102c. The lifting component 102 lifts the material and transfers it to the feeding component 103a at its upper end. This achieves the collection, screening, recycling, transfer, and return of large particles that do not meet the standards after crushing, realizing automated re-crushing and good overall practicality.

[0039] See details Figure 5 and Figure 6As shown, the feeding assembly 103a includes a hopper 103a-1, with a discharge port 103a-5 on the bottom surface of the hopper 103a-1. The inner bottom surface of the hopper 103a-1 is configured as an inclined surface 103a-4 that gathers material towards the discharge port 103a-5, thereby enabling the material in the hopper 103a-1 to automatically move towards the discharge port 103a-5. A U-shaped limiting plate 103a-2 is fixed on the bottom surface of the hopper 103a-1 at the discharge port 103a-5. The feeding assembly 103b is slidably sleeved in the U-shaped limiting plate 103a-2. The feeding assembly 103b includes a second conveyor belt 103b-1, a second outer protective frame 103b-2, and a T-shaped guide rod 103b-3. The second outer protective frame 103b-2 is located outside the second conveyor belt 103b-1. The T-shaped guide rod 103b-3 is located below the second conveyor belt 103b-1 along the conveying direction of the second conveyor belt 103b-1, and one end of the T-shaped guide rod 103b-3 is fixedly connected to the second outer protective frame 103b-2. The U-shaped limiting plate 103a-2 is provided with a limiting groove 103a-3 for clearance fit of the T-shaped guide rod 103b-3. In this way, the movement of the T-shaped guide rod 103b-3 relative to the U-shaped limiting plate 103a-2 can play a limiting and guiding role. The movement of the feeding component 103b relative to the unloading component 103a can avoid obstruction of the feeding while maintaining normal reflux and re-crushing.

[0040] Example 2

[0041] Reference Figure 4 and Figure 5 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The difference is that, in order to better implement the present invention, the specific structure of the lifting component 102 and the feeding component 103b used for transfer and return is described in detail.

[0042] Specifically, the discharge hood 101 is integrally formed from two cylindrical sections at both ends and a frustum-shaped cylinder connecting the two sections. Screening holes 101a are fixedly arranged circumferentially on the side wall of the discharge hood 101 at the frustum-shaped cylinder. The inclined upper end of the second guide platform 102c is positioned below the large-diameter cylindrical section. One end of the second guide platform 102c is fixed to one side of the inclined lower end of the first outer protective frame 102b. A protective frame 102b-1 is provided above the first conveyor belt 102a at the position of the second guide platform 102c. b-1 is fixedly connected to the top surface of the first outer protective frame 102b. The protective frame 102b-1 can play a certain role in limiting the material and prevent the material from moving below the first conveyor belt 102a. With the setting of the screening hole 101a, the material can be screened by the screen hole 101a when the discharge hood 101 is rotated. Large particles will not be screened out and will still fall into the second guide platform 102c through the discharge hood 101. Through the guidance of the second guide platform 102c, the material finally falls into the first conveyor belt 102a.

[0043] The lifting assembly 102 includes a first conveyor belt 102a, a first outer protective frame 102b, and a second guide platform 102c. The first outer protective frame 102b is located outside the first conveyor belt 102a. First rollers are slidably sleeved on the inner sides of both ends of the first conveyor belt 102a, and a first rotating shaft 102a-1 is fixedly sleeved within each first roller. Both ends of the first rotating shaft 102a-1 are rotatably connected to the first outer protective frame 102b via rolling bearings. One of the first rotating shafts 102a-1... One end extends to the outside of the first outer protective frame 102b and is embedded in the output end of the first motor 102a-2. The first motor 102a-2 is fixedly connected to the first outer protective frame 102b. The operation of the first motor 102a-2 enables the first rotating shaft 102a-1 to drive the first roller to rotate, thereby realizing the movement of the first conveyor belt 102a, so as to lift the material falling on the first conveyor belt 102a. The lifted material finally falls into the collection hopper 103a-1.

[0044] The inner sides of both ends of the second conveyor belt 103b-1 are slidably sleeved with second rollers. A second rotating shaft 103b-4 is fixedly sleeved in the second roller, and both ends of the second rotating shaft 103b-4 are rotatably connected to the second outer protective frame 103b-2 through rolling bearings. One end of one of the second rotating shafts 103b-4 extends to the outer side of the second outer protective frame 103b-2 and is embedded in the output end of the second motor 103b-5. The second motor 103b-5 is fixedly connected to the second outer protective frame 103b-2. The operation of the second motor 103b-5 drives the second rotating shaft 103b-4 to rotate the second roller, thereby moving the second conveyor belt 103b-1 so that the material discharged through the discharge port 103a-5 falls onto the second conveyor belt 103b-1 and is transferred to the ball mill mechanism 200.

[0045] Example 3

[0046] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 This is the third embodiment of the present invention. This embodiment provides a ball mill, including a ball mill discharge device and a ball milling mechanism 200, so as to change the movement trajectory of some steel balls and materials in actual use. In this way, the overall structural distribution of materials inside the ball mill cylinder 201 can be changed during crushing, thereby improving the crushing effect and having good overall practicality.

[0047] Specifically, the ball mill mechanism 200 includes a ball mill cylinder 201, a discharge cylinder 202 fixed on one end plate of the ball mill cylinder 201, and a feed cylinder 204 fixed on the other end plate of the ball mill cylinder 201. 2n inner liner plates 201a are fixedly arranged in a circumferential array on the inner wall of the feed cylinder 204. Each of the n inner liner plates 201a has multiple protrusions 201a-1 arranged in a long side direction on its inner wall. The n inner liner plates 201a-1 are provided with protrusions 201a-1. a and n other inner liner plates 201a are arranged alternately. The feed cylinder 204 is used to feed material into the ball mill cylinder 201, and the discharge cylinder 202 is used to discharge the raw material in the ball mill cylinder 201. A toothed disc is fixed on the outer wall of one of the end plates. The drive mechanism drives the toothed disc to realize the rolling of the entire ball mill cylinder 201. During the rolling of the ball mill cylinder 201, the protrusion block 201a-1 can change the movement trajectory of the material and steel ball, thereby realizing the full and efficient crushing of the material.

[0048] One end of the small-diameter cylindrical discharge hood 101 is fixed on the free end of the discharge cylinder 202. A first guide platform 203 is provided below the cylindrical position of the discharge hood 101. The material that meets the requirements after being crushed and screened is discharged through the first guide platform 203, which facilitates the collection and transportation of materials by the staff.

[0049] Furthermore, the feeding assembly 103b is disposed at one end of the feeding cylinder 204. During the circulating ball milling process, the feeding assembly 103b moves relative to the unloading assembly 103a to extend one end of the feeding assembly 103b into the feeding cylinder 204, as shown in the attached figure. Figure 7 As shown, this allows for convenient addition of raw materials by staff after the feeding component 103b is removed from the feeding cylinder 204, and automatic material return can be achieved when one end of the feeding component 103b is inserted into the feeding cylinder 204.

[0050] Additionally, it should be noted that components not described in detail in this article are existing technologies.

[0051] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the particular embodiments but extends to a variety of modifications that still fall within the scope of the appended claims.

[0052] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0053] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A ball mill discharge device, characterized in that: The system includes a circulation processing mechanism (100), which includes a discharge hood (101), a lifting component (102), and a return component (103). The return component (103) includes a feeding component (103a) and a feeding component (103b) located directly below the discharge port (103a-5) of the feeding component (103a). After ball milling, the material is screened out by the discharge hood (101) to produce large particles. The large particles are conveyed to the inclined lower end of the lifting component (102) through the second guide platform (102c). The lifting component (102) lifts the material and transfers it to the feeding component (103a) at the upper end of the lifting component (102). The feeding assembly (103a) includes a hopper (103a-1), with a discharge port (103a-5) on the bottom surface of the hopper (103a-1). A U-shaped limiting plate (103a-2) is fixedly installed on the bottom surface of the hopper (103a-1) at the discharge port (103a-5). The feeding assembly (103b) is slidably sleeved in the U-shaped limiting plate (103a-2). The feeding assembly (103b) includes a second conveyor belt (103b-1), a second outer protective frame (103b-2), and a T-shaped guide. The rod (103b-3) and the second outer protective frame (103b-2) are arranged outside the second conveyor belt (103b-1). The T-shaped guide rod (103b-3) is arranged below the second conveyor belt (103b-1) along the conveying direction of the second conveyor belt (103b-1), and one end of the T-shaped guide rod (103b-3) is fixedly connected to the second outer protective frame (103b-2). The U-shaped limiting plate (103a-2) is provided with a limiting groove (103a-3) for clearance fit of the T-shaped guide rod (103b-3).

2. The ball mill discharge device as described in claim 1, characterized in that: The lifting assembly (102) includes a first conveyor belt (102a), a first outer protective frame (102b), and a second guide platform (102c). The first outer protective frame (102b) is located outside the first conveyor belt (102a). First rollers are slidably sleeved on the inner sides of both ends of the first conveyor belt (102a), and a first rotating shaft (102a-1) is fixedly sleeved in the first roller. Both ends of the first rotating shaft (102a-1) are rotatably connected to the first outer protective frame (102b) through rolling bearings. One end of one of the first rotating shafts (102a-1) extends to the outside of the first outer frame (102b) and is fitted into the output end of the first motor (102a-2), and the first motor (102a-2) is fixedly connected to the first outer frame (102b).

3. The ball mill discharge device as described in claim 2, characterized in that: One end of the second guide platform (102c) is fixed on one side of the inclined lower end of the first outer protective frame (102b). A protective frame (102b-1) is provided above the first conveyor belt (102a) at the position of the second guide platform (102c), and the protective frame (102b-1) is fixedly connected to the top surface of the first outer protective frame (102b).

4. The ball mill discharge device as described in claim 3, characterized in that: The discharge hood (101) is integrally formed from two cylindrical sections at both ends and a frustum-shaped cylinder connected between the two cylindrical sections. Screening holes (101a) are fixedly arranged in a circumferential array on the side wall of the discharge hood (101) at the frustum-shaped cylinder. The inclined upper end of the second guide platform (102c) is located below the large-diameter cylindrical section.

5. The ball mill discharge device as described in claim 4, characterized in that: The inner bottom surface of the collecting hopper (103a-1) is configured as an inclined surface (103a-4) that gathers material towards the discharge port (103a-5).

6. The ball mill discharge device as described in claim 4, characterized in that: The inner sides of both ends of the second conveyor belt (103b-1) are slidably sleeved with second rollers, and a second rotating shaft (103b-4) is fixedly sleeved in the second rollers. Both ends of the second rotating shaft (103b-4) are rotatably connected to the second outer protective frame (103b-2) through rolling bearings. One end of one of the second rotating shafts (103b-4) extends to the outside of the second outer frame (103b-2) and is fitted into the output end of the second motor (103b-5), and the second motor (103b-5) is fixedly connected to the second outer frame (103b-2).

7. A ball mill, characterized in that: Includes a ball mill discharge device as described in any one of claims 4 to 6; and, The ball milling mechanism (200) includes a ball mill cylinder (201), a discharge cylinder (202) fixed on one end plate of the ball mill cylinder (201), and a feed cylinder (204) fixed on the other end plate of the ball mill cylinder (201). The inner wall of the feed cylinder (204) is provided with 2n inner liner plates (201a) arranged in a circumferential array. Each of the n inner liner plates (201a) is provided with a plurality of protrusions (201a-1) arranged in a long side direction on the inner wall of each of the n inner liner plates (201a). The n inner liner plates (201a) with protrusions (201a-1) and the other n inner liner plates (201a) are arranged alternately.

8. A ball mill as described in claim 7, characterized in that: One end of the small-diameter cylindrical part of the discharge hood (101) is fixed on the free end of the discharge cylinder (202), and a first guide platform (203) is provided below the position of the truncated cylindrical part of the discharge hood (101).

9. A ball mill as described in claim 8, characterized in that: The feeding assembly (103b) is disposed at one end of the feeding cylinder (204). During the circulating ball milling, the feeding assembly (103b) is moved relative to the unloading assembly (103a) so that one end of the feeding assembly (103b) extends into the feeding cylinder (204).

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