A cleaning and milling system for boehmite processing and methods of use thereof

Abstract

The application discloses a cleaning and grinding system for boehmite processing and a use method thereof, which comprises a base, a fixing frame is arranged at the top end of the base, a grinding box is arranged at the top end of the fixing frame, a filter plate is arranged at the position close to the bottom of the inner side wall of the grinding box, a cylinder is arranged at the top end of the grinding box, a supporting rod is horizontally and fixedly arranged at the top end of the cylinder, a swing rod is rotationally connected to the supporting rod, the swing rod is slidably connected with a first sliding groove, a connecting shell is arranged at the bottom end of the swing rod, a grinding rod is slidably connected into the connecting shell, and a grinding block is arranged at the bottom end of the grinding rod; a driving rod is rotationally connected to the inner side wall of the connecting shell, a sliding groove is formed in the side wall of the driving rod, a second sliding groove is formed in the side wall of the swing rod, and the second sliding groove is slidably connected with the sliding groove. The application overcomes the defects of the prior art, has a reasonable design, avoids the blockage of the filter screen plate through the disturbance of the dispersing leaves, and has high social use value and application prospect.

Description

Technical Field

[0001] This invention relates to the field of boehm grinding technology, and more particularly to a cleaning and grinding system for boehm processing and its usage method. Background Technology

[0002] Boehmite is a hydrated alumina compound with unique chemical, optical, and mechanical properties that have led to its widespread application in ceramic materials, composite materials, surface protective coatings, optical materials, catalysts and carriers, semiconductor materials, and coatings. Boehmite is manufactured by mixing raw materials.

[0003] For example, CN113772699A discloses a method for preparing boehmite and a cleaning and grinding apparatus. A second electric telescopic rod drives a lifting plate to move the grinding tank upwards, causing the grinding disc to move relative to the plate and enter the grinding tank. A suitable grinding distance is maintained between the grinding tank and the grinding disc. Then, a third drive motor drives the grinding disc to rotate, while a fourth drive motor drives the turntable and grinding tank to rotate counterclockwise relative to the grinding disc. This invention relies solely on the relative rotation of the turntable and grinding tank to grind the boehmite, resulting in low grinding efficiency. To address this problem, a cleaning and grinding system for boehmite processing, in which the boehmite is simultaneously subjected to reciprocating rolling and vertical grinding by the grinding blocks, and its usage method are provided. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a cleaning and grinding system for boehm processing and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cleaning and grinding system for boehm processing includes a base, a fixed frame at the top of the base, a grinding box at the top of the fixed frame, a filter plate near the bottom of the inner side wall of the grinding box, a cylinder at the top of the grinding box, a support rod horizontally fixed at the top of the cylinder, a swing rod rotatably connected to the support rod, the swing rod being slidably connected to a first sliding groove, a connecting housing at the bottom of the swing rod, a grinding rod slidably connected inside the connecting housing, and a grinding block at the bottom of the grinding rod.

[0007] The inner wall of the connecting housing is rotatably connected to a drive rod, the drive rod has a sliding groove on its side wall, and the swing rod has a second sliding groove on its side wall, with the second sliding groove slidably connected to the sliding groove.

[0008] Preferably, the grinding rod has a sliding block at its top end, which is slidably connected to the inner wall of the connecting housing. The top end of the sliding block has a connecting frame, on which a roller is rotatably connected. The side wall of the connecting housing has a first motor, and the output end of the first motor has a cam.

[0009] Preferably, the outer end of the drive rod is provided with a drive gear, the outer wall of the grinding box is provided with a second connecting frame, a first rotating shaft is rotatably connected to the second connecting frame, the first rotating shaft is provided with a first incomplete gear and a first gear, a second rotating shaft is rotatably connected to the second connecting frame, the second rotating shaft is provided with a second incomplete gear and a second gear, the second gear and the first gear are meshed, and the first incomplete gear and the second incomplete gear are intermittently meshed with the drive gear.

[0010] Preferably, the grinding box sidewall is provided with a rotating sleeve, the rotating sleeve sidewall is provided with a first connecting rod, the inner sidewall of the first connecting rod is rotatably connected to a dispersing shaft, the dispersing shaft is provided with a dispersing blade, the outer end of the dispersing shaft is provided with a third gear, the inner wall of the grinding box is provided with an arc-shaped toothed rail, and the third gear is meshed with the arc-shaped toothed rail.

[0011] Preferably, a baffle is provided on the outer end of the rotating sleeve, and a torsion spring is sleeved on the rotating sleeve. One end of the torsion spring is fixedly connected to the baffle, and the other end of the torsion spring is fixedly connected to the outer wall of the grinding box.

[0012] A method of using a cleaning and grinding system for boehm processing includes the following steps:

[0013] S1: The boehmite to be ground is fed into the grinding chamber through the feed inlet;

[0014] S2: The reciprocating drive rod, through the sliding connection between the second slide groove and the sliding groove, can drive the swing rod to swing back and forth, thereby driving the grinding block to grind the boehm stone at the bottom of the grinding box. At the same time, the first motor is started, and through the rolling connection between the cam and the roller, it can drive the grinding rod to move back and forth in the vertical direction, so that the boehm stone is subjected to the reciprocating crushing of the grinding block and the vertical grinding of the grinding block.

[0015] S3: Starting the third motor, the third incomplete gear meshes with the fourth gear, which can drive the rotating sleeve to rotate. The third gear meshes with the arc-shaped toothed rail, which can drive the dispersing shaft to rotate on its own axis while the dispersing shaft rotates around the rotating sleeve, thereby driving the dispersing blades to rotate, thus dispersing the boehmite at the bottom of the grinding box and preventing it from clogging the filter screen.

[0016] S4: After grinding is completed, start the drive cylinder. The drive gear and driven gear mesh to drive the scraper to rotate. The scraper pushes the residual boehmite coarse material after grinding to the discharge port, enters the spiral conveyor pipe, and is transported to the return inlet to re-enter the grinding box for grinding. While the material is being ground and discharged normally, the unqualified coarse material can be returned for re-grinding.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The reciprocating drive rod, through the sliding connection between the second slide groove and the sliding groove, can drive the swing rod to swing back and forth, thereby driving the grinding block to grind the boehm stone at the bottom of the grinding box. At the same time, the first motor is started, and through the rolling connection between the cam and the roller, it can drive the grinding rod to move back and forth in the vertical direction, so that the boehm stone is subjected to the reciprocating crushing of the grinding block and the vertical grinding of the grinding block, which can improve the grinding efficiency of the boehm stone.

[0019] 2. Starting the third motor, through the meshing connection between the third incomplete gear and the fourth gear, can drive the rotating sleeve to rotate. Through the meshing connection between the third gear and the arc-shaped toothed rail, it can drive the dispersing shaft to rotate on its own axis while the dispersing shaft rotates around the rotating sleeve, thereby driving the dispersing blades to rotate, thus dispersing the boehmite at the bottom of the grinding box and preventing it from clogging the filter screen.

[0020] 3. After grinding is completed, start the drive cylinder. The drive gear and driven gear mesh to drive the scraper to rotate. The scraper pushes the residual boehmite coarse material after grinding to the discharge port, enters the spiral conveyor pipe, and is transported to the return inlet to re-enter the grinding box for grinding. While the material is being ground and discharged normally, the unqualified coarse material can be returned for re-grinding.

[0021] In summary, this invention overcomes the shortcomings of the prior art, has a reasonable design, and avoids filter plate clogging by dispersing leaf disturbance, thus having high social use value and application prospects. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the internal structure of the grinding box of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle;

[0027] Figure 5 This is a schematic diagram of the connecting shell structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the drive rod structure of the present invention;

[0029] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle;

[0030] Figure 8 This is a schematic diagram of the rotating sleeve structure of the present invention;

[0031] Figure 9 For the present invention Figure 2 Enlarged view of the structure at point C;

[0032] Figure 10 For the present invention Figure 8 Enlarged view of the structure at point D.

[0033] In the diagram: 1. Base; 12. Fixing frame; 2. Grinding box; 21. Cylinder; 211. Support rod; 212. First slide groove; 22. Swing rod; 221. Second slide groove; 23. Connecting housing; 24. Grinding rod; 25. Grinding block; 241. Sliding block; 242. Spring; 243. Connecting frame; 244. Roller; 245. First motor; 246. Cam; 26. Drive rod; 261. Sliding groove; 2611. Drive gear; 262. Second connecting frame; 263. First rotating shaft; 2631. First incomplete gear; 2632. First gear; 264. Second rotating shaft; 2641. Second incomplete gear; 2642. 1. Second gear; 265. Second motor; 3. Rotating sleeve; 31. Baffle; 311. Torsion spring; 32. First connecting rod; 321. Dispersing shaft; 322. Dispersing blade; 323. Third gear; 324. Fourth gear; 325. Third motor; 326. Third incomplete gear; 33. Third connecting frame; 331. Scraper shaft; 332. Second connecting rod; 333. Scraper plate; 334. Driven gear; 335. Drive cylinder; 336. Drive gear rail; 301. Limiting groove; 3311. Limiting protrusion; 34. Filter plate; 341. Guide plate; 342. Spiral conveying pipe; 3422. Coarse material outlet; 3423. Return material inlet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Reference Figure 1-10 A cleaning and grinding system for boehm processing includes a base 1, a fixed frame 12 at the top of the base 1, a grinding box 2 at the top of the fixed frame 12, a filter plate 11 with an arc-shaped cross-section on the inner side wall of the grinding box 2 near the bottom, a first sliding groove 212 at the top of the grinding box 2, a cylinder 21 at the top of the grinding box 2 located to the side of the first sliding groove 212, a support rod 211 horizontally fixed at the top of the cylinder 21, a swing rod 22 rotatably connected to the support rod 211, the swing rod 22 being slidably connected to the first sliding groove 212, a connecting housing 23 at the bottom of the swing rod 22, a grinding rod 24 slidably connected inside the connecting housing 23, and a grinding block 25 at the bottom of the grinding rod 24.

[0037] Furthermore, the grinding rod 24 is provided with a sliding block 241 at its top end, which is slidably connected to the inner wall of the connecting housing 23. The top end of the sliding block 241 is provided with a connecting frame 243, and a roller 244 is rotatably connected to the connecting frame 243. A first motor 245 is provided on the side wall of the connecting housing 23. A cam 246 is provided at the output end of the first motor 245. The cam 246 is slidably connected to the roller 244. A spring 242 is sleeved on the grinding rod 24.

[0038] Furthermore, a drive rod 26 is rotatably connected to the inner wall of the connecting housing 23. A sliding groove 261 is provided on the side wall of the drive rod 26, and a second sliding groove 221 is provided on the side wall of the swing rod 22. The second sliding groove 221 is slidably connected to the sliding groove 261.

[0039] Furthermore, a drive gear 2611 is provided at the outer end of the drive rod 26, and a second connecting frame 262 is provided on the outer wall of the grinding box 2. A first rotating shaft 263 is rotatably connected to the second connecting frame 262. A first incomplete gear 2631 and a first gear 2632 are provided on the first rotating shaft 263. A second rotating shaft 264 is rotatably connected to the second connecting frame 262. A second incomplete gear 2641 and a second gear 2642 are provided on the second rotating shaft 264. The second gear 2642 and the first gear 2632 are meshed. The first incomplete gear 2631 and the second incomplete gear 2641 are intermittently meshed with the drive gear 2611. A second motor 265 is provided at the outer end of the second connecting frame 262, and the output end of the second motor 265 is fixedly connected to the first rotating shaft 263.

[0040] Furthermore, the grinding box 2 has a feed inlet 201 at the top and a discharge outlet 202 at the bottom of the side wall of the grinding box 2.

[0041] The boehmite to be ground is fed into the grinding chamber 2 through the feed inlet 201. The second motor 265 is started and can drive the second rotating shaft 264 and the first rotating shaft 263 to rotate relative to each other through the meshing connection of the second gear 2642 and the first rotating shaft 2632. This allows the first incomplete gear 2631 and the second incomplete gear 2641 to mesh with the drive gear 2611 intermittently, thereby causing the drive rod 26 to swing back and forth.

[0042] The reciprocating drive rod 26, through the sliding connection between the second slide groove 221 and the sliding groove 261, can drive the swing rod 22 to swing back and forth, thereby driving the grinding block 25 to grind the boehm stone at the bottom of the grinding box. At the same time, the first motor 245 is started, and through the rolling connection between the cam 246 and the roller 244, it can drive the grinding rod 24 to move back and forth in the vertical direction, so that the boehm stone is subjected to the reciprocating crushing and vertical grinding of the grinding block 25, which can improve the grinding efficiency of the boehm stone.

[0043] Example 2

[0044] Reference Figure 1-10 The difference between this embodiment and Embodiment 1 is that the grinding box 2 has a rotating sleeve 3 on its side wall, a baffle 31 on the outer end of the rotating sleeve 3, a torsion spring 311 on the rotating sleeve 3, one end of the torsion spring 311 is fixedly connected to the baffle 31, and the other end of the torsion spring 311 is fixedly connected to the outer wall of the grinding box 2. The rotating sleeve 3 has a first connecting rod 32 on its side wall, a dispersing shaft 321 is rotatably connected to the inner side wall of the first connecting rod 32, a dispersing blade 322 is provided on the dispersing shaft 321, the dispersing blade 322 is L-shaped, a third gear 323 is provided on the outer end of the dispersing shaft 321, an arc-shaped toothed rail is provided on the inner wall of the grinding box 2, the third gear 323 is meshed with the arc-shaped toothed rail, a fourth gear 324 is provided on the rotating sleeve 3, a third motor 325 is provided on the outer wall of the grinding box 2, a third incomplete gear 326 is provided at the output end of the third motor 325, and the third incomplete gear 326 is meshed with the fourth gear 324.

[0045] The third motor 325, when started, engages with the fourth gear 324 via the third incomplete gear 326, driving the rotating sleeve 3 to rotate. The third gear 323, engaged with the arc-shaped toothed track, simultaneously drives the dispersing shaft 321 to rotate around the rotating sleeve 3, thus rotating the dispersing blades 322. This disperses the boehmite at the bottom of the grinding chamber 2, preventing it from clogging the filter screen. After the third incomplete gear 326 has completely passed the fourth gear 324, the rotating sleeve 3 is reset by the rotation of the torsion spring 311. When the third incomplete gear 326 meshes with the fourth gear 324 again, the rotating sleeve 3 will rotate intermittently. When the rotating sleeve 3 stops, the grinding block 25 grinds the boehmite. During the grinding process, the boehmite powder may be compacted at the bottom of the filter plate 11, causing blockage. Therefore, after the grinding block 25 grinds the boehmite for a period of time, the dispersing leaf 322 disperses the boehmite at the bottom. When the dispersing shaft 321 passes the grinding block 25, the cylinder 21 can be activated to lift the grinding block 25 to facilitate the passage of the dispersing leaf 322.

[0046] Example 3

[0047] Reference Figure 1-10 The difference between this embodiment and embodiment 2 is that a third connecting frame 33 is provided on the side wall of the fixed frame 12, and a scraper shaft 331 is rotatably connected to the third connecting frame 33. The scraper shaft is rotatably connected to the inner wall of the rotating sleeve 3. A second connecting rod 332 is provided on the inner side wall of the scraper shaft 331, and a scraper plate 333 is provided on the second connecting rod 332. A driven gear 334 is provided on the outer end of the scraper shaft 331. A drive cylinder 335 is provided on the outer side wall of the third connecting frame 33, and a drive gear 336 is provided at the output end of the drive cylinder 335. The drive gear 336 is meshed with the driven gear 334. A guide plate 341 is provided on the side wall of the grinding box 2 at the discharge port 202. A spiral conveying pipe 342 is provided at the top of the base 1. A return inlet 3423 is provided at the top of the grinding box 2.

[0048] Furthermore, a limiting groove 301 is provided on the inner end of the rotating sleeve 3, and a limiting protrusion 3311 is provided on the side wall of the scraper shaft. The limiting protrusion 3311 is slidably connected to the limiting groove 301.

[0049] After grinding is completed, the drive cylinder 335 is started. The drive gear 336 meshes with the driven gear 334, which can drive the scraper 333 to rotate. The limiting protrusion 336 slides with the limiting groove 301, which can push the dispersing shaft 321 to continue to rotate without blocking the scraper 333. The scraper 333 pushes the residual boehmite coarse material after grinding to the discharge port 202, enters the spiral conveying pipe 342, and is transported to the return inlet 3423 to re-enter the grinding box 2 for grinding. While the material is being ground and discharged normally, the unqualified coarse material can be returned for re-grinding.

[0050] A method of using a cleaning and grinding system for boehm processing includes the following steps:

[0051] S1: The boehmite to be ground is fed into the grinding chamber 2 through the feed inlet 201;

[0052] S2: The reciprocating drive rod 26, through the sliding connection between the second slide groove 221 and the sliding groove 261, can drive the swing rod 22 to swing back and forth, thereby driving the grinding block 25 to grind the boehm stone at the bottom of the grinding box. At the same time, the first motor 245 is started, through the rolling connection between the cam 246 and the roller 244, can drive the grinding rod 24 to move back and forth in the vertical direction, so that the boehm stone is subjected to the reciprocating crushing of the grinding block 25 and the vertical grinding of the grinding block 25;

[0053] S3: Starting the third motor 325, through the meshing connection of the third incomplete gear 326 and the fourth gear 324, can drive the rotating sleeve 3 to rotate. Through the meshing connection of the third gear 323 and the arc-shaped toothed rail, it can drive the dispersing shaft 321 to rotate on its own axis while rotating around the rotating sleeve 3, thereby driving the dispersing blade 322 to rotate, thereby dispersing the boehmite at the bottom of the grinding box 2 and preventing it from clogging the filter screen;

[0054] S4: After grinding is completed, start the drive cylinder 335, which is connected to the driven gear 334 through the drive gear 336, which can drive the scraper 333 to rotate. The scraper 333 pushes the residual boehmite coarse material after grinding to the discharge port 202, enters the spiral conveyor pipe 342, and is transported to the return inlet 3423 to re-enter the grinding box 2 for grinding. While the material is being ground and discharged normally, the unqualified coarse material can be returned for re-grinding.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cleaning and grinding system for boehm processing, comprising a base (1), characterized in that: The base (1) is provided with a fixed frame (12) at the top, and a grinding box (2) is provided at the top of the fixed frame (12). A filter plate (11) is provided on the inner side wall of the grinding box (2) near the bottom. A cylinder (21) is provided at the top of the grinding box (2). A support rod (211) is horizontally fixed at the top of the cylinder (21). A swing rod (22) is rotatably connected to the support rod (211). The swing rod (22) is slidably connected to the first slide groove (212). A connecting housing (23) is provided at the bottom of the swing rod (22). A grinding rod (24) is slidably connected inside the connecting housing (23). A grinding block (25) is provided at the bottom of the grinding rod (24). The inner wall of the connecting housing (23) is rotatably connected to a drive rod (26), and a sliding groove (261) is provided on the side wall of the drive rod (26). A second sliding groove (221) is provided on the side wall of the swing rod (22), and the second sliding groove (221) is slidably connected to the sliding groove (261). The grinding box (2) has a rotating sleeve (3) on its side wall. The rotating sleeve (3) has a first connecting rod (32) on its side wall. The inner side wall of the first connecting rod (32) is rotatably connected to a dispersing shaft (321). The dispersing shaft (321) has a dispersing blade (322) on its side. The outer end of the dispersing shaft (321) has a third gear (323). The inner wall of the grinding box (2) has an arc-shaped toothed rail. The third gear (323) meshes with the arc-shaped toothed rail. A baffle (31) is provided on the outer end of the rotating sleeve (3), and a torsion spring (311) is sleeved on the rotating sleeve (3). One end of the torsion spring (311) is fixedly connected to the baffle (31), and the other end of the torsion spring (311) is fixedly connected to the outer wall of the grinding box (2).

2. The cleaning and grinding system for boehm processing according to claim 1, characterized in that: The grinding rod (24) has a sliding block (241) at the top end. The sliding block (241) is slidably connected to the inner wall of the connecting housing (23). The sliding block (241) has a connecting frame (243) at the top end. A roller (244) is rotatably connected to the connecting frame (243). The connecting housing (23) has a first motor (245) on its side wall. The output end of the first motor (245) has a cam (246).

3. The cleaning and grinding system for boehm processing according to claim 1, characterized in that: The drive rod (26) is provided with a drive gear (2611) at its outer end. The outer wall of the grinding box (2) is provided with a second connecting frame (262). A first rotating shaft (263) is rotatably connected to the second connecting frame (262). A first incomplete gear (2631) and a first gear (2632) are provided on the first rotating shaft (263). A second rotating shaft (264) is rotatably connected to the second connecting frame (262). A second incomplete gear (2641) and a second gear (2642) are provided on the second rotating shaft (264). The second gear (2642) and the first gear (2632) are meshed together. The first incomplete gear (2631) and the second incomplete gear (2641) are intermittently meshed with the drive gear (2611).

4. The cleaning and grinding system for boehm processing according to claim 1, characterized in that: The grinding box (2) has a feed inlet (201) at the top and a discharge outlet (202) at the bottom of the side wall.

5. A method of using a cleaning and grinding system for boehm processing as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: The boehmite to be ground is fed into the grinding chamber (2) through the feed inlet (201); S2: The reciprocating drive rod (26) can drive the swing rod (22) to swing back and forth through the second slide groove (221) and the sliding groove (261), thereby driving the grinding block (25) to grind the boehm stone at the bottom of the grinding box. At the same time, the first motor (245) is started. Through the rolling connection between the cam (246) and the roller (244), the grinding rod (24) can be driven to move back and forth in the vertical direction, so that the boehm stone is subjected to the reciprocating crushing of the grinding block (25) and the vertical grinding of the grinding block (25); S3: Starting the third motor (325) and engaging the third incomplete gear (326) with the fourth gear (324) can drive the rotating sleeve (3) to rotate. By engaging the third gear (323) with the arc-shaped toothed rail, the dispersing shaft (321) can rotate around the rotating sleeve (3) while the dispersing shaft (321) rotates, thereby driving the dispersing blade (322) to rotate, thus dispersing the boehmite at the bottom of the grinding box (2) and preventing it from clogging the filter screen. S4: After grinding is completed, start the drive cylinder (335), which meshes with the driven gear (334) through the drive gear (336), which can drive the scraper (333) to rotate. The scraper (333) pushes the residual boehmite rough material after grinding to the discharge port (202) and enters the spiral conveyor pipe (342). The residual boehmite rough material is transported to the return inlet (3423) and re-enters the grinding box (2) for grinding. While the material is being ground and discharged normally, the unqualified rough material can be returned for re-grinding.

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