Grinding equipment and process for separation and purification of nano mineral halloysite

Abstract

The invention discloses a grinding device and a process for separating and purifying nano-mineral halloysite, relating to the technical field of halloysite grinding. The device comprises a base, a lower grinding disc is arranged above the base, an upper grinding disc is arranged above the lower grinding disc, a plurality of crushing edges are fixedly connected to the upper grinding disc, the edge diameters of the upper grinding disc and the lower grinding disc are gradually reduced from top to bottom, and the edge diameters of the upper grinding disc and the lower grinding disc are gradually reduced; the spacing between the lower grinding disc and the upper grinding disc is changed, so that the gap at the edge of the grinding chamber is changed, thereby achieving the effect of being able to adjust the particle size of the ground halloysite, avoiding material jamming on the basis of convenient adjustment of the spacing between the upper grinding disc and the lower grinding disc, and after long-term use, the upper grinding disc and the lower grinding disc can be conveniently inspected and maintained after the lower grinding disc is lowered to the bottom of the upper grinding disc, and the gap between the two can be conveniently cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of halloysite grinding, in particular to grinding equipment and a process for separating and purifying nano mineral halloysite. Background Art

[0002] Halloysite needs to be ground before separation and purification to increase its dissociation degree;

[0003] The upper and lower distributed grinding discs are widely used in the crushing of halloysite because of their low rotation speed requirements and uniform product particle size. Due to the high hardness of halloysite and the relative position of the two grinding discs as the main method of quality control, traditional grinding discs are prone to wear after repeated use, and it is often necessary to adjust the relative distance between the two or replace the grinding part of the grinding disc. Since the grinding part of the upper and lower grinding discs is often located at the lip end, the halloysite particles before grinding are placed in the grinding cavity between the two grinding discs, and then the particles are gradually crushed and ground through the grinding cavity where the gap at the edge of the lip end gradually shrinks. However, when the grinding discs rotate relative to each other, some halloysite particles will be stuck inside the grinding cavity. At this time, the remaining halloysite particles will roll inside the grinding cavity with the relative rotation of the two grinding discs and are not easy to crush, which leads to the halloysite particles remaining inside the grinding space. Summary of the Invention

[0004] The object of the present invention is to provide a grinding device and process for separating and purifying nano mineral halloysite, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a grinding device for separating and purifying nano-mineral halloysite, comprising a base, a lower grinding disc disposed above the base, an upper grinding disc disposed above the lower grinding disc, a plurality of crushing edges fixedly connected to the upper grinding disc, the edge diameters of the upper and lower grinding discs gradually decreasing from top to bottom, the edge diameters of the upper and lower grinding discs gradually decreasing, a grinding chamber formed between the upper and lower grinding discs, the upper grinding disc fixedly connected to the base, a drive assembly disposed between the lower grinding disc and the base, the drive assembly being used to drive the lower grinding disc to rotate and adjust the distance between the lower grinding disc and the upper grinding disc;

[0006] The lower grinding disc is slidably connected to a plurality of ribs distributed in a circular shape with the rotation center of the lower grinding disc as the midpoint. The bottom ends of the ribs are fixedly connected to driving rods. A jacking assembly is provided below the driving rods. A support frame is commonly provided in the middle position of the plurality of jacking assemblies. The annular side of the support frame is provided with a wave groove. When the lower grinding disc rotates, the jacking assembly will rise and fall along the trajectory of the wave groove to push the driving rod and the ribs to rise and fall.

[0007] As a further solution of the present invention, the lifting assembly includes a cross bar, a second inclined surface and a third spring, the third spring is fixedly connected between the driving rod and the lower grinding disc, the end of the cross bar is located inside the wave groove, the cross bar is slidably connected to the lower grinding disc, a support rod is provided above the cross bar, the support rod is slidably connected to the lower grinding disc, a top block is slidably connected to the support rod, a first spring is fixedly connected between the top block and the side wall of the support rod, the top end of the top block is provided with a first inclined surface, and the second inclined surface is provided at the bottom end of the driving rod.

[0008] As a further solution of the present invention, the top block is rotatably connected to a roller, and a clamp is provided under the roller. The clamp is slidably connected to the top block. After the cross bar rises to contact the clamp, it drives the clamp to slide along the top block to a position that locks the roller and fixes the position of the top block.

[0009] As a further solution of the present invention, the lower grinding disc includes an integrated grinding surface and a contact surface. The center points of the grinding surface, the upper grinding disc and the support frame are coaxial, and the center point of the contact surface is eccentrically arranged relative to the grinding surface.

[0010] As a further solution of the present invention, the driving assembly includes a rotating group, the rotating group includes a plurality of motors, the motors are respectively fixedly connected to the support frame, the lower grinding disc is rotatably connected to the top of the support frame, the rotating shafts of the motors are fixedly connected to gears, and the bottom end of the lower grinding disc is provided with a tooth portion meshing with the gear;

[0011] The driving assembly also includes a lifting group for lifting the support frame.

[0012] As a further solution of the present invention, the lifting group includes a plurality of hydraulic rods, the hydraulic rods are fixedly connected between the support frame and the base, and the support frame is slidably connected to the inner wall of the base.

[0013] As a further solution of the present invention, a rib is provided at the bottom of the grinding surface, a plurality of scrapers are slidably connected to the rib, a second spring is fixedly connected between the scraper and the rib, and no less than two rings are provided on the outside of the rib, the rings are all provided on the upper grinding disc, and a plurality of discharge holes are opened at the bottom of the ring.

[0014] As a further solution of the present invention, the collar and the upper grinding disc are connected by bolts.

[0015] A process for separating and purifying the nano mineral halloysite, the process comprising the following steps:

[0016] Step 1: Use the driving assembly to push the lower grinding plate and the upper grinding plate to a specified distance in advance;

[0017] Step 2: The drive assembly drives the lower grinding disc to rotate and grind the halloysite particles inside the grinding chamber. During the grinding process, the crossbar moves up and down inside the wave groove, causing the ribs to move up and down intermittently to avoid material jamming and assist in crushing.

[0018] Step 3: The contact surface eccentrically arranged with the grinding surface squeezes and crushes the halloysite particles accumulated on the edge of the grinding chamber while rotating. The ground halloysite falls into the collar and is pushed into the discharge hole by the scraper.

[0019] Step 4: The cooperation between the top block and the first spring can reduce the height of the rising bar when the rotation speed of the lower grinding disc increases. After the cross bar rises to contact with the clamp, the clamp locks the roller so that the top block cannot slide along the support rod to prevent the top block from shifting.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The distance between the lower grinding disc and the upper grinding disc changes, so that the gap at the edge of the grinding chamber changes, thereby being able to adjust the particle size of the ground halloysite. In addition, the distance between the upper and lower grinding discs can be easily adjusted to avoid material jamming. After long-term use, the lower grinding disc can be lowered to the bottom of the upper grinding disc, which can facilitate the inspection and maintenance of the upper and lower grinding discs and the cleaning of the gap between the two.

[0022] When the ribs rise, they will enter the grinding chamber and reduce the effective activity space of the particles inside the grinding chamber, and can push the halloysite particles to move inside the grinding chamber, so that the activity space of the halloysite particles is restricted. With the cooperation of the ribs and the crushing edges, the particles inside the grinding chamber are assisted in extrusion and crushing, thereby increasing the mutual extrusion force between the particles without rolling, thereby reducing the possibility of material jamming. Through the size of the centrifugal force, that is, the increase in the rotation speed of the lower grinding disc, the height of the rising ribs is reduced but the frequency is increased to adapt to the auxiliary crushing effect when the grinding rate increases. When the rotation speed increases, the rising amplitude of the ribs becomes smaller, which can directly reduce the impact on the ribs without affecting the mutual crushing of the halloysite particles inside the grinding chamber and avoiding material jamming. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 This is a schematic diagram of the internal structure of the upper grinding disc and the base of the present invention;

[0025] Figure 3 Schematic diagram of the internal structure of the lower grinding disc of the present invention;

[0026] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0027] Figure 5 Schematic diagrams of different placement positions of the crossbars in the wave trough of the present invention, wherein inset (a) is a schematic diagram of the crossbars when all are located at the bottom of the wave trough, and inset (b) is a schematic diagram of the crossbars when they coexist downward in the wave trough;

[0028] Figure 6 Schematic diagram of the grinding surface after it is lowered and at its initial position;

[0029] Figure 7 Schematic diagram of the positional relationship between the grinding surface, the contact surface and the tooth portion of the present invention;

[0030] Figure 8 It is a front view of the eccentric contact surface and the grinding surface of the present invention;

[0031] Figure 9 Schematic diagram of the collar and scraper of the present invention;

[0032] Figure 10 for Figure 9 A partial enlarged view of point B in the middle;

[0033] Figure 11 Schematic diagram of the driving rod and the ribs as well as the support rod and the crossbar of the present invention;

[0034] Figure 12 Schematic diagram of the roller, support rod and clamping member of the present invention;

[0035] Figure 13 Schematic diagram of the hydraulic rod and support frame of the present invention.

[0036] The reference numerals are as follows:

[0037] 1. Base; 2. Lower grinding disc; 3. Upper grinding disc; 4. Grinding chamber; 5. Ridge; 6. Drive rod; 7. Lifting assembly; 8. Support frame; 9. Wave groove; 10. Cross bar; 11. Support rod; 12. Ejector block; 13. First spring; 14. First inclined surface; 15. Second inclined surface; 16. Roller; 17. Clamp; 18. Grinding surface; 19. Contact surface; 20. Motor; 21. Gear; 22. Tooth portion; 23. Hydraulic rod; 24. Side guard; 25. Scraper; 26. Second spring; 27. Third spring; 28. Ring; 29. Feed hole; 30. Crushing edge. DETAILED DESCRIPTION

[0038] See also Figures 1-13The present invention provides a technical solution: a grinding device for separating and purifying nano-mineral halloysite, comprising a base 1, a lower grinding disc 2 is arranged above the base 1, an upper grinding disc 3 is arranged above the lower grinding disc 2, a plurality of crushing edges 30 are fixedly connected to the upper grinding disc 3, the edge diameters of the upper grinding disc 3 and the lower grinding disc 2 are gradually reduced from top to bottom, a grinding chamber 4 is formed between the upper grinding disc 3 and the lower grinding disc 2, the upper grinding disc 3 is fixedly connected to the base 1, a driving component is arranged between the lower grinding disc 2 and the base 1, and the driving component is used to drive the lower grinding disc 2 to rotate and adjust the distance between the lower grinding disc 2 and the upper grinding disc 3;

[0039] The lower grinding disc 2 is slidably connected to a number of ribs 5 distributed in a circular shape with the rotation center of the lower grinding disc 2 as the midpoint. The bottom ends of the ribs 5 are fixedly connected to drive rods 6. A lifting assembly 7 is provided below the drive rods 6. A support frame 8 is commonly provided in the middle position of the several lifting assemblies 7. The annular side of the support frame 8 is provided with a wave groove 9. When the lower grinding disc 2 rotates, the lifting assembly 7 will rise and fall along the trajectory of the wave groove 9 to push the drive rod 6 and the ribs 5 to rise and fall.

[0040] like Figure 1-Figure 3 As shown:

[0041] The halloysite particles to be ground are placed into the grinding chamber 4 through the feed hole opened on the top of the upper grinding disc 3. The particles will spread to the surrounding of the grinding chamber 4. Then the driving assembly rotates the lower grinding disc 2. At this time, the halloysite particles in the grinding chamber 4 will be gradually ground. The ground powder will fall through the gap between the upper grinding disc 3 and the lower grinding disc 2.

[0042] The halloysite that is easy to get stuck is mostly of a shape with a blunt surface. When the halloysite particles with a blunt surface remain inside the grinding chamber 4, as the lower grinding disc 2 rotates, the remaining halloysite particles are not blocked inside the grinding chamber 4 and will roll along with the rotation of the lower grinding disc 2. By providing the crushing edge 30 and the plurality of ribs 5, the lifting assembly 7 follows the trajectory of the wave groove 9 and rises and falls cyclically when the lower grinding disc 2 rotates. When the ribs 5 rise, they enter the interior of the grinding chamber 4, reducing the effective activity space of the particles inside the grinding chamber 4, and can push the halloysite particles to move inside the grinding chamber 4. The movement of the halloysite particles limits their movement space, and the cooperation of the ribs 5 and the crushing edges 30 assists in the extrusion and crushing of the particles inside the grinding chamber 4, thereby increasing the mutual extrusion force between the particles without rolling, thereby reducing the possibility of material jamming. In addition, the ribs 5 are arranged to rise and fall intermittently. When the ribs 5 rise, they assist in crushing and avoiding material jamming. When the ribs 5 fall, the particles in the grinding chamber 4 are ground and crushed by mutual extrusion and contact with the upper grinding disc 3 and the lower grinding disc 2, reducing the direct contact time between the ribs 5 and the particles, thereby reducing the impact directly borne by the ribs 5.

[0043] Moreover, the driving assembly also has the function of completing the lifting of the lower grinding disc 2, such as Figure 6 As shown, it can control the distance between the lower grinding disc 2 and the upper grinding disc 3, and then change the gap at the edge of the grinding chamber 4, so as to adjust the particle size of the ground halloysite, and avoid material jamming on the basis of convenient adjustment of the distance between the upper grinding disc 3 and the lower grinding disc 2. After long-term use, the lower grinding disc 2 is lowered to the bottom of the upper grinding disc 3, which can facilitate the inspection and maintenance of the upper grinding disc 3 and the lower grinding disc 2, and can also facilitate the cleaning of the gap between the two.

[0044] The lifting assembly includes a cross bar 10, a second inclined surface 15 and a third spring 27. The third spring 27 is fixedly connected between the driving rod 6 and the lower grinding disc 2. The end of the cross bar 10 is located inside the wave groove 9. The cross bar 10 is slidingly connected to the lower grinding disc 2. A support rod 11 is provided above the cross bar 10. The support rod 11 is slidingly connected to the lower grinding disc 2. A top block 12 is slidingly connected to the support rod 11. A first spring 13 is fixedly connected between the top block 12 and the side wall of the support rod 11. A first inclined surface 14 is provided at the top of the top block 12, and a second inclined surface 15 is provided at the bottom end of the driving rod 6.

[0045] like Figure 2-Figure 8 、 Figure 11-13 As shown:

[0046] When the driving assembly drives the lower grinding disc 2 to rotate, the ends of several cross bars 10 will rise and fall in a circular manner along the inner part of the wave groove 9. When the cross bar 10 rises, its end will slide up inside the lower grinding disc 2. When the top end of the cross bar 10 rises to contact the bottom of the top block 12, it will directly push the top block 12 and the support rod 11 to rise. At this time, the support rod 11 will slide up along the lower grinding disc 2. At this time, the corrugated bar 5 will be inserted into the interior of the grinding chamber 4 to prevent the halloysite particles from getting stuck. When the cross bar 10 descends, the third spring 27 can assist the corrugated bar 5 in resetting.

[0047] The first spring 13 is pulled upwards by the top block 12 and the second spring 13 is pulled downwards by the top block 12. The first spring 13 is pulled upwards by the top block 12 and the second spring 13 is pulled downwards by the top block 12.

[0048] Therefore, when the rotation speed of the lower grinding disc 2 is high, the grinding efficiency is high. At this time, when the cross bar 10 rotates with the lower grinding disc 2, the frequency of the cross bar 10 rising and falling inside the wave groove 9 will increase, but the top block 12 will gradually move away from the support frame 8 as the rotation speed increases. When the lifting frequency of the cross bar 10 increases, the distance between the driving rod 6 and the rising ribs 5 will decrease. The centrifugal force (that is, the increase in the rotation speed of the lower grinding disc 2) reduces the rising height of the ribs 5 but increases the frequency to adapt to the auxiliary crushing effect when the grinding rate increases. When the rotation speed increases, the rising amplitude of the ribs 5 becomes smaller, which can directly reduce the impact on the ribs 5 without affecting the mutual crushing of the halloysite particles inside the grinding chamber 4 and avoiding material jamming.

[0049] Moreover, the initial positions of multiple cross bars 10 in the wave groove 9 can be preset so that all of them are at the bottom or coexist in the upper and lower positions, such as Figure 5 a and Figure 5 As shown in b, the setting positions of multiple ribs 5 can be completed according to needs, that is, simultaneous rising or rising and falling can be achieved, and the change in the number of rising ribs 5 can be used to achieve the change in the extrusion pressure on the particles inside the grinding chamber 4.

[0050] The top block 12 is rotatably connected to a roller 16, and a clamp 17 is provided below the roller 16. The clamp 17 is slidably connected to the top block 12. After the cross bar 10 rises to contact the clamp 17, it drives the clamp 17 to slide along the top block 12 to a position where the roller 16 is locked to fix the position of the top block 12 at this time.

[0051] like Figure 10 and Figure 11 As shown:

[0052] When the speed of the lower grinding disc 2 increases, the top block 12 stretches the first spring 13 and slides along the support rod 11. At this time, the roller 16 will roll along the bottom of the support rod 11. When the speed of the lower grinding disc 2 is constant, the top block 12 keeps the tension on the first spring 13 and stops on the support rod 11. When the cross bar 10 rises inside the wave groove 9 and contacts with the clamp 17, it will first push the clamp 17 to slide up along the top block 12. When the clamp 17 contacts with the roller 16, it will lock the roller 16 to ensure that the roller 16 and the top block 12 stay in this position, and then the cross bar 10 directly pushes the clamp 17, the top block 12, the support rod 11, the drive rod 6 and the rib 5 to rise.

[0053] The lower grinding disc 2 includes an integrated grinding surface 18 and a contact surface 19 . The center points of the grinding surface 18 , the upper grinding disc 3 and the support frame 8 are coaxial, and the center point of the contact surface 19 is eccentrically arranged relative to the grinding surface 18 .

[0054] like Figure 2 、 Figure 3 and Figure 8 As shown:

[0055] The contact surface 19 is not coaxial with the support frame 8, the upper grinding disc 3 and the base 1, while the grinding surface 18 is coaxial with the support frame 8, the upper grinding disc 3 and the base 1. The eccentrically arranged contact surface 19 can rotate in an eccentric manner, thereby squeezing the large number of particles accumulated on the side of the grinding chamber 4, thereby avoiding the problem of material jamming and incomplete crushing that makes normal grinding inconvenient.

[0056] The driving assembly includes a rotating group, which includes several motors 20. The motors 20 are respectively fixedly connected to the support frame 8. The lower grinding disc 2 is rotatably connected to the top of the support frame 8. The rotating shafts of the motors 20 are fixedly connected to gears 21. The bottom end of the lower grinding disc 2 is provided with a tooth portion 22 that matches the gear 21.

[0057] The drive assembly also includes a lifting group.

[0058] The lifting group includes a plurality of hydraulic rods 23 , which are fixedly connected between the support frame 8 and the base 1 , and the support frame 8 is slidably connected to the inner wall of the base 1 .

[0059] like Figure 3 and Figure 13 As shown:

[0060] The rotation of the motor 20 drives the gear 21 to rotate, and the gear 21 drives the tooth portion 22 to rotate, thereby causing the lower grinding disc 2 to rotate relative to the upper grinding disc 3;

[0061] When the distance between the lower grinding disc 2 and the upper grinding disc 3 needs to be adjusted, the distance adjustment between the lower grinding disc 2 and the upper grinding disc 3 can be completed by controlling the sliding distance of the support frame 8 inside the base 1 through the telescopic control of the hydraulic rod 23.

[0062] A rib 24 is provided at the bottom of the grinding surface 18, and a number of scrapers 25 are slidably connected to the rib 24. A second spring 26 is fixedly connected between the scraper 25 and the rib 24. No less than two rings 28 are provided on the outside of the rib 24. The rings 28 are all provided on the upper grinding disc 3, and a plurality of discharge holes 29 are opened at the bottom of the ring 28.

[0063] The collar 28 and the upper grinding disc 3 are both connected by bolts.

[0064] like Figure 1-Figure 3 , Figure 9 and Figure 10 As shown:

[0065] During grinding, the lower grinding disc 2 drives the retaining edge 24 to rotate while keeping in contact with the collar 28. When the ground halloysite falls onto the collar 28, the scraper 25 can push the accumulated halloysite on the collar 28 into the discharge hole 29 for easy collection.

[0066] When fine-tuning the distance between the lower grinding disc 2 and the upper grinding disc 3, the second spring 26 pushes the scraper 25, so that the scraper 25 can continue to contact with the ring 28. If it is necessary to lower the lower grinding disc 2 for a long distance, multiple rings 28 can be removed from the upper grinding disc 3 in advance by bolts, and then the lower grinding disc 2 can be moved away from the upper grinding disc 3.

[0067] A process for separating and purifying the nano mineral halloysite, the process comprising the following steps:

[0068] Step 1: Use the driving assembly to push the lower grinding disc 2 and the upper grinding disc 3 to a specified distance in advance;

[0069] Step 2: The driving assembly drives the lower grinding disc 2 to rotate and grind the halloysite particles inside the grinding chamber 4. During the grinding process, the crossbar 10 moves up and down inside the wave groove 9, causing the ribs 5 to move up and down intermittently to avoid material jamming and assist in crushing.

[0070] Step 3: The contact surface 19 eccentrically arranged with respect to the grinding surface 18 squeezes and crushes the halloysite particles accumulated at the edge of the grinding chamber 4 while rotating. The ground halloysite falls into the collar 28 and is pushed to the discharge hole 29 by the scraper 25.

[0071] Step 4: The cooperation between the top block 12 and the first spring 13 can reduce the rising height of the rib 5 when the rotation speed of the lower grinding disc 2 increases. After the cross bar 10 rises to contact with the clamp 17, the clamp 17 locks the roller 16 so that the top block 12 cannot slide along the support rod 11 to prevent the top block 12 from deflecting.

Claims

1. A grinding device for separating and purifying nano mineral halloysite, comprising a base (1), characterized in that: A lower grinding disc (2) is provided above the base (1), an upper grinding disc (3) is provided above the lower grinding disc (2), a plurality of crushing edges (30) are fixedly connected to the upper grinding disc (3), the edge diameters of the upper grinding disc (3) and the lower grinding disc (2) are gradually reduced from top to bottom, a grinding cavity (4) is formed between the upper grinding disc (3) and the lower grinding disc (2), the upper grinding disc (3) is fixedly connected to the base (1), a driving assembly is provided between the lower grinding disc (2) and the base (1), the driving assembly is used to drive the lower grinding disc (2) to rotate and adjust the distance between the lower grinding disc (2) and the upper grinding disc (3); The lower grinding disc (2) is slidably connected to a plurality of ribs (5) distributed in a circular shape with equal distances and the rotation center of the lower grinding disc (2) being the midpoint. The bottom ends of the ribs (5) are fixedly connected to a driving rod (6). A lifting assembly (7) is provided below the driving rod (6). A support frame (8) is provided in the middle of the plurality of lifting assemblies (7). A wave groove (9) is provided on the annular side surface of the support frame (8). When the lower grinding disc (2) rotates, the lifting assembly (7) will be lifted and lowered along the trajectory of the wave groove (9) to push the driving rod (6) and the ribs (5) to lift and lower. The lifting assembly includes a cross bar (10), a second inclined surface (15) and a third spring (27), the third spring (27) is fixedly connected between the driving rod (6) and the lower grinding disc (2), the end of the cross bar (10) is located inside the wave groove (9), the cross bar (10) is slidably connected to the lower grinding disc (2), a support rod (11) is provided above the cross bar (10), the support rod (11) is slidably connected to the lower grinding disc (2), a top block (12) is slidably connected to the support rod (11), a first spring (13) is fixedly connected between the top block (12) and the side wall of the support rod (11), a first inclined surface (14) is provided at the top end of the top block (12), and the second inclined surface (15) is provided at the bottom end of the driving rod (6); The top block (12) is rotatably connected to a roller (16), and a clamping member (17) is provided below the roller (16). The clamping member (17) is slidably connected to the top block (12). After the cross bar (10) rises to contact the clamping member (17), it drives the clamping member (17) to slide along the top block (12) to a position where the roller (16) is locked and the top block (12) is fixed in position.

2. A grinding device for separation and purification of nano mineral halloysite according to claim 1, characterized in that: The lower grinding disc (2) comprises an integrated grinding surface (18) and a contact surface (19); the center points of the grinding surface (18), the upper grinding disc (3) and the support frame (8) are coaxial; and the center point of the contact surface (19) is eccentrically arranged relative to the grinding surface (18).

3. A grinding device for separation and purification of nano mineral halloysite according to claim 1, characterized in that: The driving assembly includes a rotating group, the rotating group includes a plurality of motors (20), the motors (20) are fixedly connected to the support frame (8), the lower grinding disc (2) is rotatably connected to the top of the support frame (8), the rotating shafts of the motors (20) are fixedly connected to gears (21), and the bottom end of the lower grinding disc (2) is provided with a tooth portion (22) meshing with the gear (21); The driving assembly also includes a lifting group for lifting the support frame (8).

4. A grinding device for separation and purification of nano mineral halloysite according to claim 3, characterized in that: The lifting group comprises a plurality of hydraulic rods (23), wherein the hydraulic rods (23) are fixedly connected between the support frame (8) and the base (1), and the support frame (8) is slidably connected to the inner wall of the base (1).

5. A grinding device for separation and purification of nano mineral halloysite according to claim 2, characterized in that: A retaining edge (24) is provided at the bottom of the grinding surface (18), a plurality of scrapers (25) are slidably connected to the retaining edge (24), a second spring (26) is fixedly connected between the scraper (25) and the retaining edge (24), and no less than two collars (28) are provided outside the retaining edge (24), the collars (28) are all provided on the upper grinding disc (3), and a plurality of discharge holes (29) are opened at the bottom of the collar (28).

6. A grinding device for separation and purification of nano mineral halloysite according to claim 5, characterized in that: The collar (28) and the upper grinding disc (3) are both connected via bolts.

7. A process for separating and purifying nano-mineral halloysite, using the grinding equipment for separating and purifying nano-mineral halloysite according to any one of claims 5 to 6, characterized in that: The process includes the following steps: Step 1: The lower grinding disc (2) and the upper grinding disc (3) are pre-pushed together by the driving assembly to adjust the grinding particle size; Step 2: The driving assembly drives the lower grinding disc (2) to rotate and grind the halloysite particles inside the grinding chamber (4). During the grinding, the crossbar (10) rises and falls inside the wave groove (9), causing the ribs (5) to rise and fall intermittently to avoid material jamming and assist in crushing. Step 3: The contact surface (19) eccentrically arranged with the grinding surface (18) squeezes and crushes the halloysite particles accumulated on the edge of the grinding chamber (4) while rotating, and the ground halloysite falls into the collar (28) and is pushed into the discharge hole (29) by the scraper (25); Step 4: The cooperation between the top block (12) and the first spring (13) can reduce the height of the rising of the rib (5) when the rotation speed of the lower grinding disc (2) increases. After the cross bar (10) rises to contact with the clamp (17), the clamp (17) locks the roller (16) so that the top block (12) cannot slide along the support rod (11), thereby preventing the top block (12) from deflecting.

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