Ball mill and screening device thereof

Abstract

The utility model provides a ball mill and a screening device thereof. The ball mill comprises a grinding cylinder, and the screening device is arranged below the grinding cylinder. The screening device comprises a first screening assembly, a first driving mechanism and a tray. The first screening assembly comprises a first mounting frame and a first screen mesh, the first screen mesh is arranged in the first mounting frame and provided with a plurality of first screen holes, the first screen mesh is used for receiving the grinding media and materials moved out of the grinding cylinder, and the diameter of the first screen holes is smaller than the particle size of the grinding media and larger than the particle size of the materials; the first driving mechanism is used for at least driving the first screen to do reciprocating vibration in the first preset direction so as to screen the grinding medium and the materials; the tray is used for bearing the first mounting frame and bearing screened materials. The screening device provided by the utility model can be used for automatically screening a mixture of a grinding medium and a material, is high in screening efficiency and is beneficial to protecting human health.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screening, especially to a ball mill and screening device thereof. BACKGROUND

[0002] In the existing ball mill, when the grinding medium is recycled, replaced or cleaned, the mixture of the grinding medium and the material falling into the recycling box needs to be manually screened after the grinding cylinder is opened to screen the grinding medium from the mixture. However, manual screening is not only inefficient, but also produces a large amount of dust during the screening process, which is harmful to human health. SUMMARY

[0003] The utility model aims at at least solving one of the problems existing in the prior art. To this end, the utility model provides a ball mill and screening device thereof, which can automatically screen the mixture of the grinding medium and the material, has high screening efficiency and is beneficial to the protection of human health.

[0004] To achieve the above-mentioned purpose, on the one hand, the utility model provides a screening device for use in a ball mill, wherein the ball mill comprises a grinding cylinder, the screening device is arranged below the grinding cylinder, and the screening device comprises:

[0005] a first screening assembly comprising a first mounting frame and a first screen, the first screen is arranged in the first mounting frame and has a plurality of first screen holes, the first screen is used to receive the grinding medium and the material removed from the grinding cylinder, the diameter of the first screen hole is smaller than the particle size of the grinding medium and larger than the particle size of the material;

[0006] a first driving mechanism for driving the first screen to reciprocatingly vibrate along a first predetermined direction to screen the grinding medium and the material; and

[0007] a tray for carrying the first mounting frame and receiving the screened material.

[0008] On the other hand, the utility model further provides a ball mill comprising a rack and a grinding cylinder detachably mounted on the rack, wherein the ball mill further comprises the above-mentioned screening device, the rack has a receiving cavity, and the screening device is arranged in the receiving cavity.

[0009] Among them, the tray and / or the first screening assembly are slidably arranged in the rack to move out of or into the receiving cavity.

[0010] Compared with the prior art, the screen device has the beneficial effects that: in the screening device, since the diameter of the first screen hole is smaller than the particle size of the grinding medium and larger than the particle size of the material, when the first screen mesh reciprocatingly vibrates under the driving of the first driving mechanism, the material can fall to the tray through the first screen hole on the first screen mesh, but the grinding medium cannot pass through the first screen hole on the first screen mesh and is retained on the first screen mesh, so that the mixture of the grinding medium and the material is automatically screened.

[0011] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0013] Figure 1 is a sectional view of the ball mill from one perspective.

[0014] Figure 2 is Figure 1 a sectional view of the ball mill from another perspective.

[0015] Figure 3 is Figure 1 an enlarged schematic view of the I part.

[0016] Figure 4 is Figure 2 a structural schematic view of the screen device after the first driving mechanism is removed.

[0017] Figure 5 is Figure 4 a side view of the screen device.

[0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 1000 - ball mill; 100 - screening device; 200 - grinding cylinder; 300 - frame; 400 - stirring shaft; 500 - driving motor; 20 - first screening assembly; 21 - first mounting frame; 211 - first opening; 22 - first screen; 220 - first screen hole; 221 - first end; 222 - second end; 23 - first support frame; 24 - first baffle; 25 - buckle; 30 - first driving mechanism; 40 - tray. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0021] It should be noted that in the description of the present application, the terms "first", "second", etc. are used to distinguish different objects, and are not used to describe a specific order, and the term "multiple" means at least two, so it cannot be understood as a limitation of the present application. In addition, unless otherwise specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through other elements, or the internal communication of two elements; it can be communication connection, or electrical connection, wherein whether it is communication connection or electrical connection also includes direct connection or indirect connection through other elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Please combine Figure 1 and Figure 2 The embodiments of the present application provide a ball mill 1000, which comprises a screening device 100, a grinding cylinder 200 and a frame 300, the screening device 100 and the grinding cylinder 200 are installed on the frame 300, and the screening device 100 is arranged below the grinding cylinder 200. Wherein, the frame 300 is provided with different accommodation cavities to accommodate the screening device 100 and the grinding cylinder 200 respectively. Similar to the existing ball mill, the ball mill 1000 also comprises a stirring shaft 400 penetratingly arranged in the grinding cylinder 200, the axial direction of the stirring shaft 400 is the same as that of the grinding cylinder 200, the outer peripheral wall of the stirring shaft 400 is provided with a plurality of paddles, and the grinding cylinder 200 is provided with a feeding port for the grinding medium and the material to enter, so that when the stirring shaft 400 rotates under the driving of the driving mechanism, the plurality of paddles can stir the mixture of the grinding medium and the material in the grinding cylinder 200, thereby performing ball milling operation on the material by the grinding medium. Wherein, as shown in the drawings, the ball mill 1000 further comprises a first screening assembly 20, a first mounting frame 21, a first opening 211, a first screen 22, a first screen hole 220, a first end 221, a second end 222, a first support frame 23, a first baffle 24, a buckle 25, a first driving mechanism 30 and a tray 40. Figure 1 andFigure 2 In the embodiment of the present application, the driving mechanism can be, but is not limited to, a driving motor 500 mounted on the rack 300, and the driving motor 500 is drivingly connected to the stirring shaft 400 through a belt transmission or a chain wheel transmission, so as to drive the stirring shaft 400 to rotate.

[0023] It should be noted that, in the embodiment of the present application, the screening device 100 is used for automatically screening the mixture of the grinding medium and the material removed from the grinding cylinder 200. Specifically, please refer to the following description. Figures 3 to 5 In the embodiment of the present application, the screening device 100 comprises a first screening assembly 20, a first driving mechanism 30 and a tray 40. The first screening assembly 20 comprises a first mounting frame 21 and a first screen 22, the first screen 22 is arranged in the first mounting frame 21 and has a plurality of first screen holes 220, the first screen 22 is used for receiving the grinding medium and the material removed from the grinding cylinder 200 (see Figure 1 ), the diameter of the first screen hole 220 is smaller than the particle size of the grinding medium and larger than the particle size of the material. The first driving mechanism 30 is used for driving the first screen 22 to reciprocate along a first preset direction, so as to screen the grinding medium and the material. The tray 40 is used for carrying the first mounting frame 21 and receiving the screened material.

[0024] It can be understood that, in the embodiment of the present application, since the diameter of the first screen hole 220 is smaller than the particle size of the grinding medium and larger than the particle size of the material, when the first screen 22 reciprocates under the driving of the first driving mechanism 30, the material can fall to the tray 40 through the first screen hole 220 on the first screen 22, but the grinding medium cannot pass through the first screen hole 220 on the first screen 22 and remains on the first screen 22, thereby realizing automatic screening of the mixture of the grinding medium and the material. Compared with the manual screening in the prior art, the automatic screening by using the screening device 100 in the present application can not only improve the screening efficiency and save labor, but also is beneficial to protecting human health.

[0025] Preferably, in the embodiment of the present application, the ratio between the diameter of the grinding medium and the diameter of the first screen hole 220 ranges from 2 to 3. By limiting the ratio between the particle size of the grinding medium and the diameter of the first screen hole 220, on the one hand, the diameter of the first screen hole 220 can be prevented from being too large to prevent the grinding medium from being partially embedded in the first screen hole 220, and on the other hand, the diameter of the first screen hole 220 can be prevented from being too small to prevent the material from passing through the first screen hole 220 too slowly, thereby reducing the screening efficiency.

[0026] Optionally, as Figure 3As shown, in one embodiment of this utility model, the first screen 22 can be movably disposed within the first mounting frame 21, and the first driving mechanism 30 is used to drive the first screen 22 to reciprocate along a first preset direction within the first mounting frame 21 to screen the grinding media and materials. In this embodiment, by movably disposing the first screen 22 within the first mounting frame 21, the first driving mechanism 30 only needs to drive the first screen 22 to reciprocate, which reduces the load on the first driving mechanism 30, makes the reciprocating vibration of the first screen 22 more stable, and also helps to extend the service life of the first driving mechanism 30.

[0027] Preferred, in Figure 3 In the illustrated embodiment, the first screening component 20 further includes a first support frame 23 composed of at least one support rib. The first support frame 23 is movably disposed within the first mounting frame 21 and connected to the side of the first screen 22 facing the tray 40. The first support frame 23 supports the first screen 22. A first drive mechanism 30 is connected to the first support frame 23 to drive the first support frame 23 to reciprocate along a first preset direction within the first mounting frame 21, thereby causing the first support frame 23 to drive the first screen 22 to reciprocate along the first preset direction within the first mounting frame 21. In this embodiment, by providing the first support frame 23 to support the first screen 22, the structural strength of the first screen 22 can be improved, thereby preventing deformation of the first screen 22 after prolonged reciprocating vibration, which is beneficial to ensuring the screening effect of the first screen 22. The first support frame 23 can be integrally formed with the first screen 22, or it can be formed separately and connected to the first screen 22 by any means such as welding, riveting, snap-fit ​​connection, or threaded connection; there is no limitation on this.

[0028] Further preferred, in Figure 3 In the illustrated embodiment, the first support frame 23 is composed of multiple support ribs, which support different parts of the first screen 22, thereby further improving the structural strength of the first screen 22. The multiple support ribs can be arranged in different ways, such as parallel spacing or intersecting distribution, and this is not limited.

[0029] Further preferred, in Figure 3In the shown embodiment, the first preset direction is a vertical direction, i.e. the first screen 22 and the first support frame 23 are slidably arranged in the first mounting frame 21 along the vertical direction, and the first driving mechanism 30 comprises a first driving member and a first transmission assembly, the first transmission assembly being connected between the first driving member and the first support frame 23, and the first driving member drives the first support frame 23 and the first screen 22 to reciprocatingly vibrate along the vertical direction through the first transmission assembly. It is not difficult to understand that, in the embodiment, the first screen 22 and the first support frame 23 are arranged to be slidably arranged in the first mounting frame 21 along the vertical direction, so that the space of the first mounting frame 21 in the vertical direction can be fully utilized, and the space occupied by the first screening assembly 20 can be reduced.

[0030] Of course, in other embodiments of the present application, the first preset direction can also be a horizontal direction, i.e. the first screen 22 and the first support frame 23 are slidably arranged in the first mounting frame 21 along the horizontal direction, and the first driving member drives the first support frame 23 and the first screen 22 to reciprocatingly vibrate along the horizontal direction through the first transmission assembly, which will not be described herein.

[0031] In addition, when the profiles of the first mounting frame 21 and the first screen 22 are both circular, the first preset direction can also be the circumferential direction of the first mounting frame 21, i.e. the first screen 22 and the first support frame 23 are rotatably arranged in the first mounting frame 21 along the circumferential direction of the first mounting frame 21, and the first driving member drives the first support frame 23 and the first screen 22 to reciprocatingly rotate along the circumferential direction of the first mounting frame 21 through the first transmission assembly, which can also achieve the screening purpose, and will not be described herein.

[0032] It can be understood that, in some embodiments of the present application, the first screening assembly 20 can also be configured as a swing screen structure to swing screen by the first driving member driving the first screening assembly 20 through the first transmission assembly, which will not be described herein.

[0033] The first driving member and the first transmission assembly can be, but are not limited to, a combination of a vibration motor and a connecting rod, as long as they can improve the vibration driving force along the first preset direction, which will not be limited.

[0034] Alternatively, in other embodiments of the present application, the first screen 22 can also be fixedly arranged in the first mounting frame 21, and the first driving mechanism 30 is used to drive the first mounting frame 21 and the first screen 22 to reciprocatingly vibrate along the first preset direction. As described above, the first preset direction can be a vertical direction, a horizontal direction, or a circumferential direction of the first mounting frame 21. Compared with the first screening assembly 20 in the embodiment, the first screening assembly 20 in the other embodiments of the present application has the same screening effect, and will not be described herein. Figure 3 and Figure 4In the illustrated embodiment, the first screen 22 is fixedly disposed in the first mounting frame 21, and the two can be integrated as one unit for easy installation and to avoid noise caused by possible sliding contact when the first screen 22 slides within the first mounting frame 21. Of course, when the first screen 22 is fixedly disposed within the first mounting frame 21, the first screen 22 can also be supported by the first support frame 23, which will not be elaborated further.

[0035] Please combine Figure 1 and Figure 4 In one embodiment of this utility model, the first screen 22 has a first end 221 and a second end 222 opposite to each other. The distance between the first end 221 and the tray 40 is greater than the distance between the second end 222 and the tray 40. The first screen 22 is inclinedly disposed within the first mounting frame 21. The grinding cylinder 200 is detachably mounted on the frame 300, and the grinding cylinder 200 can move along its own axial direction (i.e., Figure 1 The grinding media and materials move relative to the stirring shaft 400 (shown from left to right) so that they are moved out of the grinding cylinder 200 and fall into the screening device 100 under the drive of the stirring shaft 400 and several blades. It can be understood that in this embodiment, when the grinding cylinder 200 moves along its own axial direction, under the drive of the stirring shaft 400 and several blades, during the process of the grinding media and materials moving out of the grinding cylinder 200 and falling into the screening device 100, the mixture of grinding media and materials will preferentially contact the first end 221 of the first screen 22, so that screening is performed when the first drive mechanism 30 drives the first screen 22 to reciprocate. Furthermore, while the first screen 22 is screening the mixture, the mixture will roll towards the second end 222 of the first screen 22. The first screen 22 will continue to screen the mixture during the rolling process, which is equivalent to extending the screening path and screening time of the mixture, which is beneficial to improving screening efficiency and achieving thorough screening of the mixture.

[0036] Optionally, in other embodiments of this utility model, the grinding cylinder 200 may also include a first cylinder and a second cylinder opposite to the first cylinder. The cross-sections of the first and second cylinders are semi-circular. One end of the first cylinder in the radial direction of the grinding cylinder 200 is rotatably connected to the corresponding end of the second cylinder in the radial direction of the grinding cylinder 200. The first cylinder can rotate relative to the second cylinder to open or close the grinding cylinder 200. When the grinding cylinder 200 is open, the grinding media and materials move out of the grinding cylinder 200 and fall into the screening device 100. That is, the grinding cylinder 200 is composed of an opposite first and second cylinder. By controlling the rotation of the first cylinder relative to the second cylinder to open the grinding cylinder 200, the grinding media and materials move out of the grinding cylinder 200 and fall into the screening device 100, thus eliminating the need to move the grinding cylinder 200 and simplifying operation.

[0037] Please combine Figure 3 and Figure 4 In one of the embodiments of the present application, the first screen 22 divides the first mounting frame 21 into a first cavity and a second cavity, the first cavity is located on the side of the first screen 22 away from the tray 40 (i.e. on the side above the first screen 22), and the second cavity is located on the side of the first screen 22 facing the tray 40 (i.e. on the side below the first screen 22). Among them, the first mounting frame 21 is provided with a first opening 211, the first opening 211 communicates with the first cavity, and the first screening assembly 20 further comprises a first baffle 24, the first baffle 24 is movably connected to the first mounting frame 21 and located on the outside of the first mounting frame 21, and the first baffle 24 is used to open or close the first opening 211. In this embodiment, by opening the first opening 211 on the first mounting frame 21 to communicate with the first cavity, and by opening or closing the first opening 211 through the first baffle 24, in this way, when the first screen 22 completes the ball milling classification operation on the mixture of grinding medium and material, the user can open the first baffle 24 to open the first opening 211, and then recover the grinding medium in the first cavity of the first mounting frame 21 through the opened first opening 211, so that the operation of recovering the grinding medium is simple and fast.

[0038] Among them, please combine Figure 4 and Figure 5 In the embodiment of the present application, the first baffle 24 can be movably connected to the first mounting frame 21 through a pair of buckles 25, or can be movably connected to the first mounting frame 21 through a hinge or other connecting members, as long as it can ensure that the first baffle 24 can open or close the first opening 211, which is not limited.

[0039] Preferably, in Figure 3 and Figure 4In the example, the first mounting frame 21 has opposite first and second sides, the first opening 211 is formed on the first side of the first mounting frame 21, and the screening device 100 further comprises a discharging driving mechanism configured to drive the second side of the first mounting frame 21 to move so that the second side of the first mounting frame 21 is higher than the first side of the first mounting frame 21 in the vertical direction, and thus the grinding medium in the first cavity is moved out of the first cavity through the opened first opening 211. It can be understood that, by driving the second side of the first mounting frame 21 to move through the discharging driving mechanism, the first mounting frame 21 is inclined, and thus the grinding medium in the first cavity can roll to the first opening 211, which can improve the efficiency of recycling the grinding medium. The first side of the first mounting frame 21 is close to the outer wall of the rack 300, so as to facilitate the recycling operation of the user. It should be noted that the discharging driving mechanism can be but is not limited to a push cylinder. Furthermore, in some embodiments of the present application, when the first driving mechanism 30 is configured to drive the first mounting frame 21 and the first screen 22 to reciprocate together, the discharging driving mechanism and the first driving mechanism 30 can be the same driving member, that is, the first driving mechanism 30 can not only drive the first mounting frame 21 and the first screen 22 to screen, but also drive the second side of the first mounting frame 21 to move. For example, in one possible implementation, the first side of the first mounting frame 21 is rotationally connected to the tray 40, and the first driving mechanism 30 is configured to drive the second side of the first mounting frame 21 to reciprocate in the vertical direction to achieve the purpose of screening, and after the screening is completed, the first driving mechanism 30 drives the second side of the first mounting frame 21 to move in the vertical direction to be higher than the first side of the first mounting frame 21, thereby achieving the purpose of discharging; in another possible implementation, the first driving mechanism 30 is configured to drive the first mounting frame 21 and the first screen 22 to reciprocate to achieve the purpose of screening, and after the screening is completed, the first driving mechanism 30 drives the second side of the first mounting frame 21 to move in the vertical direction to be higher than the first side of the first mounting frame 21, thereby achieving the purpose of discharging.

[0040] Optionally, in other embodiments of the present application, the tray 40 and / or the first screening assembly 20 can be slidably arranged in the rack 300 to move out of or into the receiving cavity of the rack 300, thereby facilitating the recycling of the material falling into the tray 40 and / or the grinding medium located in the first screening assembly 20. Preferably, the ball mill 1000 further comprises a pushing mechanism (not shown in the figure), which is configured to drive the tray 40 and / or the first screening assembly 20 to slide relative to the rack 300, so as to facilitate the recycling of the material in the tray 40 and / or the grinding medium in the first screening assembly 20. The pushing mechanism can be but is not limited to a push cylinder.

[0041] Of course, the ball mill 1000 can also not be provided with the pushing mechanism, and the tray 40 and / or the first screening assembly 20 can be driven to slide relative to the rack 300 manually, and the same purpose can also be achieved.

[0042] Optionally, in other embodiments of the present application, the screening device 100 further comprises a second screening assembly and a second driving mechanism, the second screening assembly comprises a second mounting frame and a second screen, the second screen is arranged in the second mounting frame and has a plurality of second screen holes, the second screen is used for receiving the mixture passing through the plurality of first screen holes on the first screen, the diameter of the second screen hole is smaller than the diameter of the first screen hole and equal to the target particle size, the target particle size is the preset maximum allowable value of the particle size of the material after being ground by the ball mill 1000, and the material with a particle size greater than the target particle size needs to be re-introduced into the grinding cylinder 200 of the ball mill 1000 for regrinding; the second driving mechanism is used for driving the second screen to reciprocatingly vibrate along a second preset direction, so as to screen the mixture, wherein the second mounting frame is mounted on the tray 40, and the first mounting frame 21 is mounted on the second mounting frame. By increasing the second screening assembly between the first screening assembly 20 and the tray 40, and setting the diameter of the second screen hole to be smaller than the diameter of the first screen hole and equal to the target particle size, the mixture of the grinding medium and the material can be initially screened by the first screening assembly 20, and the material after the initial screening can be secondarily screened by the second screening assembly. After the secondary screening, the material that needs to be regrounded stays on the second screen, and the qualified material that does not need to be regrounded falls into the tray 40, which helps to improve the screening effect of the screening device 100. In addition, part of the grinding medium may be broken during the grinding process, and the broken pieces may pass through the first screen holes 220 on the first screen 22. The second screen can also be used to screen out the broken pieces to avoid contamination of the material.

[0043] It can be understood that the structure of the second screening assembly is basically the same as that of the first screening assembly 20, and the structure of the second driving mechanism is basically the same as that of the first driving mechanism 30, which will not be described here.

[0044] It should be noted that, similar to the existing ball mill, the ball mill 1000 provided by the embodiments of the present application also has other components, such as but not limited to a sealing assembly, a gas supply assembly, etc., which are not limited and will not be described here.

[0045] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, or the communication inside two elements.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0046] In the description of the present specification, the description of the terms "embodiment", "specific embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A screening device for use in a ball mill (1000), the ball mill (1000) comprising a grinding cylinder (200), the screening device (100) being disposed below the grinding cylinder (200), characterized in that, The screening device (100) includes: The first screening component (20) includes a first mounting frame (21) and a first screen (22). The first screen (22) is disposed in the first mounting frame (21) and has a plurality of first screen holes (220). The first screen (22) is used to receive the grinding media and materials removed from the grinding cylinder (200). The diameter of the first screen holes (220) is smaller than the particle size of the grinding media and larger than the particle size of the material. A first driving mechanism (30) is used to drive the first screen (22) to reciprocate along a first preset direction to screen the grinding media and the material; and A tray (40) is used to carry the first mounting frame (21) and to receive the screened material.

2. The screening device as described in claim 1, characterized in that, The first screening assembly (20) further includes a first support frame (23) consisting of at least one support rib. The first support frame (23) is movably disposed within the first mounting frame (21) and connected to the side of the first screen (22) facing the tray (40). The first support frame (23) is used to support the first screen (22). The first drive mechanism (30) is connected to the first support frame (23) so as to drive the first support frame (23) to reciprocate in the first mounting frame (21) along the first preset direction, and the first support frame (23) drives the first screen (22) to reciprocate in the first mounting frame (21) along the first preset direction.

3. The screening device as described in claim 2, characterized in that, The first preset direction is the vertical direction. The first screen (22) and the first support frame (23) are slidably disposed in the first mounting frame (21) in the vertical direction. The first driving mechanism (30) includes a first driving member and a first transmission component. The first transmission component is connected between the first driving member and the first support frame (23). The first driving member drives the first support frame (23) and the first screen (22) to reciprocate in the vertical direction through the first transmission component.

4. The screening device as described in claim 1, characterized in that, The first screen (22) is fixedly disposed in the first mounting frame (21), and the first driving mechanism (30) is used to drive the first mounting frame (21) and the first screen (22) to reciprocate along the first preset direction.

5. The screening device as described in claim 1, characterized in that, The first screen (22) has a first end (221) and a second end (222) opposite to each other. The distance between the first end (221) and the tray (40) is greater than the distance between the second end (222) and the tray (40). The first screen (22) is inclinedly disposed in the first mounting frame (21).

6. The screening device as described in claim 1, characterized in that, The grinding cylinder (200) includes a first cylinder and a second cylinder that is aligned with the first cylinder, wherein the cross-sections of the first cylinder and the second cylinder are semi-circular. Wherein, one end of the first cylinder in the radial direction of the grinding cylinder (200) is rotatably connected to the corresponding end of the second cylinder in the radial direction of the grinding cylinder (200). The first cylinder can rotate relative to the second cylinder to open or close the grinding cylinder (200). When the grinding cylinder (200) is opened, the grinding medium and the material are moved out of the grinding cylinder (200) and fall into the screening device (100).

7. The screening device as described in claim 1, characterized in that, The ratio between the particle size of the grinding media and the diameter of the first sieve hole (220) is in the range of 2 to 3.

8. The screening device as described in claim 1, characterized in that, The first screen (22) divides the first mounting frame (21) into a first cavity and a second cavity. The first cavity is located on the side of the first screen (22) facing away from the tray (40), and the second cavity is located on the side of the first screen (22) facing the tray (40). The first mounting frame (21) has a first opening (211) which communicates with the first cavity; The first screening component (20) further includes a first baffle (24), which is movably connected to the first mounting frame (21) and located outside the first mounting frame (21). The first baffle (24) is used to open or close the first opening (211).

9. The screening apparatus according to any one of claims 1 to 8, characterized in that, The screening device (100) further includes: The second screening component includes a second mounting frame and a second screen. The second screen is disposed within the second mounting frame and has a plurality of second screen holes. The second screen is used to receive the mixture passing through the plurality of first screen holes (220) on the first screen (22). The diameter of the second screen holes is smaller than the diameter of the first screen holes (220) and equal to the target particle size. And a second drive mechanism, used to drive the second screen to reciprocate along a second preset direction to screen the mixture; The second mounting frame is mounted on the tray (40), and the first mounting frame (21) is mounted on the second mounting frame.

10. A ball mill, comprising a frame (300) and a grinding cylinder (200) detachably mounted on the frame (300), characterized in that, The ball mill (1000) further includes a screening device as described in any one of claims 1 to 9, wherein the frame (300) has a receiving cavity, and the screening device (100) is disposed in the receiving cavity; The tray (40) and / or the first screening component (20) are slidably disposed on the frame (300) to move out of or into the receiving cavity.

11. The ball mill as described in claim 10, characterized in that, The ball mill (1000) also includes a pushing mechanism for driving the tray (40) and / or the first screening assembly (20) to slide relative to the frame (300).

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