Grinding equipment and process for separating and purifying nano mineral halloysite

Abstract

The invention discloses grinding equipment and technology for separation and purification of nano mineral halloysite, and relates to the technical field of halloysite grinding, the grinding equipment comprises a base, a lower grinding disc is arranged above the base, an upper grinding disc is arranged above the lower grinding disc, the upper grinding disc is fixedly connected with a plurality of crushing edges, and the crushing edges are arranged on the base. The diameters of the edges of the upper millstone and the lower millstone are gradually reduced from top to bottom, and the diameters of the edges of the upper millstone and the lower millstone are gradually reduced; the distance between the lower millstone and the upper millstone is changed, so that a gap in the edge of the grinding cavity is changed, the effect of adjusting the granularity of the ground halloysite can be achieved, and material blocking is avoided on the basis that the distance between the upper millstone and the lower millstone is convenient to adjust; after the lower millstone descends below the upper millstone, the upper millstone and the lower millstone can be conveniently overhauled and maintained, and a gap between the upper millstone and the lower millstone can be conveniently cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of halloysite grinding, and specifically to a grinding device and process for the separation and purification of nano-mineral halloysite. Background Art

[0002] Before the separation and purification of halloysite, it is necessary to grind it to improve its dissociation degree; The upper and lower grinding disks are widely used in the crushing of halloysite because of their low rotational speed requirements and uniform product particle size. Since halloysite has a relatively high hardness, and the main way of product quality control is the relative position of the two grinding disks, traditional grinding disks are prone to wear after multiple uses. It is often necessary to adjust the relative distance between the two or replace the grinding parts of the grinding disks. Since the grinding parts of the upper and lower grinding disks are often located at the lip ends, the halloysite particles before grinding are placed in the grinding cavity between the two grinding disks, and then the particles are gradually crushed through the grinding cavity with the gradually narrowing gap at the lip end edge for grinding. However, when the grinding disks rotate relative to each other, some halloysite particles will get stuck inside the grinding cavity. At this time, the remaining halloysite particles will roll inside the grinding cavity along with the relative rotation of the two grinding disks, making it difficult to break them, and thus resulting in the retention of halloysite particles inside the grinding space. Summary of the Invention

[0003] The purpose of the present invention is to provide a grinding device and process for the separation and purification of nano-mineral halloysite, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A grinding device for the separation and purification of nano-mineral halloysite, including a base. Above the base is provided a lower grinding disk, and above the lower grinding disk is provided an upper grinding disk. A plurality of crushing edges are fixedly connected to the upper grinding disk. The diameters of the edges of both the upper grinding disk and the lower grinding disk gradually decrease from top to bottom. A grinding cavity is formed between the upper grinding disk and the lower grinding disk. The upper grinding disk is fixedly connected to the base, and a driving assembly is arranged between the lower grinding disk and the base. The driving assembly is used to drive the lower grinding disk to rotate and adjust the distance between the lower grinding disk and the upper grinding disk; A plurality of ribs are slidably connected to the lower grinding disk, which are annularly and equidistantly distributed with the center of rotation of the lower grinding disk as the midpoint. The bottom ends of the ribs are fixedly connected with driving rods, and jacking assemblies are arranged below the driving rods. A support frame is commonly arranged at the middle position of the plurality of jacking assemblies. A wave groove is formed on the annular side surface of the support frame. When the lower grinding disk rotates, the jacking assemblies will lift and lower along the track of the wave groove to push the driving rods and the ribs to lift and lower.

[0005] As a further solution of the present invention, the jacking 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 arranged 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. A first inclined surface is arranged at the top end of the top block. The second inclined surface is arranged at the bottom end of the driving rod.

[0006] As a further solution of the present invention, the top block is rotatably connected with a roller. A clamping member is arranged below the roller. The clamping member is slidably connected to the top block. After the cross bar rises to contact the clamping member, it will drive the clamping member to slide along the top block to a position where the roller is locked and fix the position of the top block.

[0007] As a further solution of the present invention, the lower grinding disc includes an integrated grinding surface and a contact surface. The centers of the grinding surface, the upper grinding disc and the support frame are coaxial. The center point of the contact surface is eccentrically arranged relative to the grinding surface.

[0008] 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 end of the support frame. The rotating shafts of the motors are all fixedly connected with gears. A tooth portion meshing with the gears is arranged at the bottom end of the lower grinding disc; The driving assembly further includes a lifting group for lifting the support frame.

[0009] 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. The support frame is slidably connected to the inner wall of the base.

[0010] As a further solution of the present invention, a retaining edge is arranged at the bottom of the grinding surface. A plurality of scraping plates are slidably connected to the retaining edge. A second spring is fixedly connected between the scraping plates and the retaining edge. There are no less than two collar rings arranged outside the retaining edge. The collar rings are all arranged on the upper grinding disc. A plurality of material discharging holes are opened at the bottom of the collar rings.

[0011] As a further solution of the present invention, the collar rings and the upper grinding disc are both connected by bolts.

[0012] A process for the separation and purification of nano-mineral halloysite includes the following steps: Step 1: The driving assembly is used to pre-push the lower grinding disc and the upper grinding disc to approach to a specified distance; Step 2: The driving component drives the lower grinding disc to rotate to grind the halloysite particles inside the grinding cavity. While grinding, the cross bar rises and falls inside the wave groove to make the rib rise intermittently to avoid material jamming and assist in crushing. Step 3: The contact surface eccentrically arranged with the grinding surface will crush the halloysite particles accumulated at the edge of the grinding cavity while rotating. The ground halloysite falls into the collar and is pushed by the scraper to the blanking hole. Step 4: The cooperation of the top block and the first spring can reduce the rising height of the rib when the rotation speed of the lower grinding disc increases. After the cross bar rises to contact the clamping part, the top block is locked by the clamping part to the roller and cannot slide along the support rod to prevent the top block from shifting.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The distance between the lower grinding disc and the upper grinding disc changes, causing the gap at the edge of the grinding cavity to change, thereby achieving the effect of being able to adjust the particle size of the ground halloysite. Moreover, on the basis of the convenient adjustment of the distance between the upper grinding disc and the lower grinding disc, material jamming is avoided. After long-term use, when the lower grinding disc descends below the upper grinding disc, it is convenient to repair and maintain the upper grinding disc and the lower grinding disc, and it is also convenient to clean the gap between the two.

[0014] When the rib rises, it will enter the inside of the grinding cavity, reducing the effective movement space of the particles inside the grinding cavity, and can push the halloysite particles to move inside the grinding cavity, restricting the movement space of the halloysite particles. With the cooperation of the rib and the crushing edge, it plays an auxiliary role in squeezing and crushing the particles inside the grinding cavity, thereby increasing the mutual extrusion force between the particles without rolling, and then reducing the possibility of material jamming. Through the magnitude of the centrifugal force, that is, the increase in the rotation speed of the lower grinding disc, the rising height of the rib decreases but the frequency increases to adapt to the auxiliary crushing effect when the grinding rate increases. When the rotation speed increases, the rising amplitude of the rib becomes smaller, which can directly reduce the impact borne by the rib while not affecting the mutual crushing of the halloysite particles inside the grinding cavity and avoiding material jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the internal structural schematic diagram of the upper grinding disc and the base of the present invention; Figure 3 is the internal structural schematic diagram of the lower grinding disc of the present invention; Figure 4 is Figure 3 the partial enlarged view at A in Figure 5Schematic diagrams of different placement positions of the cross bar of the present invention in the wave groove, where the small diagram (a) is a schematic diagram when the cross bar is entirely below the interior of the wave groove, and the small diagram (b) is a schematic diagram when the cross bar is inside the wave groove and coexists downward; Figure 6 Schematic diagram of the present invention after the grinding surface descends and its initial position; Figure 7 Schematic diagram of the positional relationship between the grinding surface, the contact surface, and the tooth portion of the present invention; Figure 8 Front view of the present invention with the contact surface eccentric to the grinding surface; Figure 9 Schematic diagram of the collar and the scraper of the present invention; Figure 10 is Figure 9 Partial enlarged view at position B in; Figure 11 Schematic diagram of the driving rod, the rib, the support rod, and the cross bar of the present invention; Figure 12 Schematic diagram of the roller, the support rod, and the clamping member of the present invention; Figure 13 Schematic diagram of the hydraulic rod and the support frame of the present invention.

[0016] The reference numerals are as follows: 1, base; 2, lower grinding disc; 3, upper grinding disc; 4, grinding chamber; 5, rib; 6, driving rod; 7, jacking assembly; 8, support frame; 9, wave groove; 10, cross bar; 11, support rod; 12, top block; 13, first spring; 14, first inclined surface; 15, second inclined surface; 16, roller; 17, clamping member; 18, grinding surface; 19, contact surface; 20, motor; 21, gear; 22, tooth portion; 23, hydraulic rod; 24, edge; 25, scraper; 26, second spring; 27, third spring; 28, collar; 29, material discharge hole; 30, crushing edge. Detailed implementation manners

[0017] Please refer to Figures 1 - 13 , the present invention provides a technical solution: a grinding device for separating and purifying nano-mineral halloysite, including 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 diameters of the edges of the upper grinding disc 3 and the lower grinding disc 2 gradually decrease 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, and a driving assembly is arranged between the lower grinding disc 2 and the base 1, and 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; A number of ridges 5 are slidably connected to the lower grinding disc 2. The ridges 5 are centered on the rotation center of the lower grinding disc 2 and are evenly distributed in a ring shape at equal distances. The bottom ends of the ridges 5 are fixedly connected to driving rods 6. Below the driving rods 6, a number of jacking assemblies 7 are provided. In the middle position of the several jacking assemblies 7, a support frame 8 is jointly provided. The annular side surface of the support frame 8 is provided with a wavy groove 9. When the lower grinding disc 2 rotates, the jacking assemblies 7 will lift and lower along the track of the wavy groove 9 to push the driving rods 6 and the ridges 5 to lift and lower.

[0018] As Figures 1 - 3 shown: The halloysite particles to be ground are put into the interior of the grinding cavity 4 through the feeding holes opened at the top of the upper grinding disc 3. Here, the particles will spread towards the periphery of the grinding cavity 4. Then, the driving assembly rotates the lower grinding disc 2. At this time, the halloysite particles inside the grinding cavity 4 will be gradually ground, and the ground powder falls through the gap between the upper grinding disc 3 and the lower grinding disc 2. Most of the halloysite that is prone to jamming materials has a shape with a non-sharp surface. When halloysite particles with a non-sharp surface remain inside the grinding cavity 4, as the lower grinding disc 2 rotates, the remaining halloysite particles will roll along with the rotation of the lower grinding disc 2 without being blocked inside the grinding cavity 4. However, through the provided crushing edge 30 and multiple ridges 5, when the lower grinding disc 2 rotates, the jacking assemblies 7 will lift and lower cyclically along the track of the wavy groove 9. When the ridges 5 rise, they will enter the interior of the grinding cavity 4 to reduce the effective moving space of the particles inside the grinding cavity 4, and can push the halloysite particles to move inside the grinding cavity 4, restricting the moving space of the halloysite particles. With the cooperation of the ridges 5 and the crushing edge 30, it plays an auxiliary role in squeezing and crushing the particles inside the grinding cavity 4, thereby increasing the mutual extrusion force between the particles and preventing them from rolling, thereby reducing the possibility of jamming materials. Moreover, the ridges 5 are arranged to lift intermittently. After the ridges 5 rise, they play a role in auxiliary crushing and preventing jamming materials. After the ridges 5 descend, the particles in the grinding cavity 4 are ground and crushed through mutual extrusion and contact with the upper grinding disc 3 and the lower grinding disc 2, reducing the duration of direct contact between the ridges 5 and the particles, and thus reducing the impact directly borne by the ridges 5. Moreover, the driving assembly also has the function of completing the lifting of the lower grinding disc 2. As Figure 6 shown, it can control the distance between the lower grinding disc 2 and the upper grinding disc 3, thereby changing the gap at the edge of the grinding cavity 4, so as to achieve the effect of being able to adjust the particle size of the ground halloysite. Moreover, on the basis of the convenient adjustment of the distance between the upper grinding disc 3 and the lower grinding disc 2, it can avoid jamming materials. After long-term use, when the lower grinding disc 2 descends below the upper grinding disc 3, it is convenient to repair and maintain the upper grinding disc 3 and the lower grinding disc 2, and it is also convenient to clean the gap between the two.

[0019] 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 arranged 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 arranged at the top end of the top block 12. The second inclined surface 15 is arranged at the bottom end of the driving rod 6.

[0020] As Figures 2 - 8 , Figures 11 - 13 shown: When the driving assembly drives the lower grinding disc 2 to rotate, the ends of several cross bars 10 will cyclically lift and lower along the inside of the wave groove 9. When the cross bar 10 rises, its end will slide upward 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 upward along the lower grinding disc 2. At this time, the rib 5 will be inserted into the grinding cavity 4 to prevent the halloysite particles from jamming. When the cross bar 10 descends, the third spring 27 can assist the rib 5 to reset; Moreover, the top block 12 is slidably connected to the support rod 11. The magnitude of the centrifugal force generated by the speed of rotation of the lower grinding disc 2 will determine the length of the first spring 13 pulled by the top block 12. That is, the faster the lower grinding disc 2 rotates and the greater the centrifugal force, the farther the top block 12 will be from the support frame 8. By setting the first inclined surface 14 and the second inclined surface 15, the slope directions of the first inclined surface 14 and the second inclined surface 15 are both gradually increasing from the side close to the support frame 8 to the side far from the support frame 8. When the rising height of the cross bar 10 is fixed, the farther the first inclined surface 14 is from the support frame 8, the smaller the height by which the top block 12 will lift the driving rod 6 after contacting the second inclined surface 15 at the bottom of the driving rod 6; 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 follows the rotation of the lower grinding disc 2, the frequency of the cross bar 10 lifting and lowering inside the wave groove 9 will increase. However, as the rotation speed increases, the top block 12 gradually moves away from the support frame 8. When the frequency of the cross bar 10 lifting and lowering increases, the rising distance of the driving rod 6 and the rib 5 will decrease. The height of the rib 5 rising is reduced but the frequency increases due to the magnitude of the centrifugal force (i.e., the increase in the rotation speed of the lower grinding disc 2) to adapt to the auxiliary crushing effect when the grinding rate increases. When the rotation speed increases, the rising amplitude of the rib 5 becomes smaller, which can directly reduce the impact on the rib 5 while not affecting the mutual crushing of the halloysite particles inside the grinding cavity 4 and avoiding jamming; Moreover, the initial positions of multiple cross bars 10 inside the wave groove 9 can be preset so that they are all at the lowest position or arranged with some above and some below, such as Figure 5 a and Figure 5As shown in Fig. b, the setting positions of the multiple rib strips 5 can be completed according to requirements, that is, simultaneous rising or coexistence of rising and falling can be achieved, and the change in the extrusion force borne by the particles inside the grinding cavity 4 is completed by changing the number of rising rib strips 5.

[0021] The top block 12 is rotatably connected with a roller 16. A clamping member 17 is arranged below the roller 16. The clamping member 17 is slidably connected with the top block 12. After the cross bar 10 rises to contact the clamping member 17, it will drive the clamping member 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.

[0022] As Figure 10 and Figure 11 shown: When the rotational 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 rotational speed of the lower grinding disc 2 is constant, the top block 12 stops on the support rod 11 while keeping the first spring 13 stretched. When the cross bar 10 rises inside the wave groove 9 to contact the clamping member 17, it will first push the clamping member 17 to slide up along the top block 12. When the clamping member 17 contacts the roller 16, it will lock the roller 16 to ensure that the roller 16 and the top block 12 stay at this position. Then the cross bar 10 directly pushes the clamping member 17, the top block 12, the support rod 11, the driving rod 6 and the rib strip 5 to rise.

[0023] The lower grinding disc 2 includes an integrated grinding surface 18 and a contact surface 19. The central points of the grinding surface 18, the upper grinding disc 3 and the support frame 8 are coaxial. The central point of the contact surface 19 is eccentrically arranged relative to the grinding surface 18.

[0024] As Figure 2 , Figure 3 and Figure 8 shown: 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 present an eccentric rotation, thereby generating extrusion on the relatively large amount of particles accumulated on the side part of the grinding cavity 4, thus avoiding problems such as material jamming and incomplete crushing that are not conducive to normal grinding.

[0025] The driving assembly includes a rotating group. The rotating group includes a number of 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 all fixedly connected with gears 21. A tooth part 22 matching the gears 21 is arranged at the bottom end of the lower grinding disc 2; The driving assembly further includes a lifting group.

[0026] The lifting group includes several 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.

[0027] As Figure 3 and Figure 13 shown: By the rotation of the motor 20, the gear 21 is driven to rotate, and the gear 21 drives the tooth part 22 to rotate, thereby enabling the lower grinding disc 2 to rotate relative to the upper grinding disc 3; When it is necessary to adjust the distance between the lower grinding disc 2 and the upper grinding disc 3, the sliding distance of the support frame 8 inside the base 1 can be controlled by the telescopic movement of the hydraulic rod 23 to complete the adjustment of the distance between the lower grinding disc 2 and the upper grinding disc 3.

[0028] A retaining edge 24 is provided at the bottom of the grinding surface 18. A number of scraping plates 25 are slidably connected to the retaining edge 24. A second spring 26 is fixedly connected between the scraping plate 25 and the retaining edge 24. There are no less than two collar rings 28 provided outside the retaining edge 24. The collar rings 28 are all provided on the upper grinding disc 3, and a plurality of material discharging holes 29 are opened at the bottom of the collar rings 28.

[0029] The collar rings 28 and the upper grinding disc 3 are both connected by bolts.

[0030] As Figures 1 - 3 , Figure 9 and Figure 10 shown: During grinding, the lower grinding disc 2 drives the retaining edge 24 to rotate while keeping it in contact with the collar ring 28. When the halloysite after grinding falls onto the collar ring 28, the scraping plate 25 can push the halloysite accumulated on the collar ring 28 into the material discharging holes 29 for convenient collection; When finely adjusting the distance between the lower grinding disc 2 and the upper grinding disc 3, the scraping plate 25 can be continuously in contact with the collar ring 28 by the pushing of the second spring 26 on the scraping plate 25. If it is necessary to lower the lower grinding disc 2 over a long distance, the plurality of collar rings 28 are pre-removed from the upper grinding disc 3 by bolts, and then the lower grinding disc 2 is moved away from the upper grinding disc 3.

[0031] A separation and purification process for nano-mineral halloysite, the process comprising the following steps: Step one: The driving assembly is used to pre-push the lower grinding disc 2 and the upper grinding disc 3 to a specified distance; Step two: The driving assembly drives the lower grinding disc 2 to rotate to grind the halloysite particles inside the grinding cavity 4. While grinding, the cross bar 10 rises and falls inside the wave groove 9 to make the rib 5 rise and fall intermittently to avoid material jamming and assist in crushing; Step three: The contact surface 19 eccentrically arranged with the grinding surface 18 will crush the halloysite particles accumulated at the edge of the grinding cavity 4 while rotating. The ground halloysite falls into the collar ring 28 and is pushed into the material discharging holes 29 by the scraping plate 25; 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 the clamping member 17, the clamping member 17 locks the roller 16, preventing the top block 12 from sliding along the support rod 11 to avoid the deviation of the top block 12.

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 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); The lower grinding disc (2) is slidably connected to a plurality of ribs (5) which are equidistantly distributed in a ring 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 driving rods (6). A lifting assembly (7) is arranged below the driving rods (6). A support frame (8) is arranged 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) is 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.

2. A grinding device for separation and purification of nano mineral halloysite according to claim 1, characterized in that: The lifting assembly comprises a cross bar (10), a second inclined surface (15) and a third spring (27), wherein 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 arranged 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 arranged at the top end of the top block (12), and the second inclined surface (15) is arranged at the bottom end of the driving rod (6).

3. A grinding device for separation and purification of nano mineral halloysite according to claim 2, characterized in that: The top block (12) is rotatably connected to a roller (16), a clamping member (17) is provided below the roller (16), and the clamping member (17) is slidably connected to the top block (12). When 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, thereby fixing the top block (12) in position.

4. A grinding device for separation and purification of nano mineral halloysite according to claim 3, 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).

5. A grinding device for separation and purification of nano mineral halloysite according to claim 1, characterized in that: The driving assembly comprises a rotating group, the rotating group comprises 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 toothed portion (22) meshing with the gear (21); The driving assembly also includes a lifting group for lifting the support frame (8).

6. A grinding device for separation and purification of nano mineral halloysite according to claim 5, 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).

7. A grinding device for separation and purification of nano mineral halloysite according to claim 4, 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), at least two sleeve rings (28) are provided outside the retaining edge (24), the sleeve rings (28) are all provided on the upper grinding disc (3), and a plurality of material discharge holes (29) are provided at the bottom of the sleeve ring (28).

8. A grinding device for separation and purification of nano mineral halloysite according to claim 7, characterized in that: The collar (28) and the upper grinding disc (3) are both connected via bolts.

9. A process for separating and purifying nano mineral halloysite, using a grinding device for separating and purifying nano mineral halloysite according to any one of claims 7 to 8, characterized in that: The process includes the following steps: Step 1: The lower grinding disc (2) and the upper grinding disc (3) are pushed closer 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 in the grinding chamber (4). During the grinding, the crossbar (10) is lifted and lowered in the wave groove (9), so that the ribs (5) are lifted and lowered 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 sleeve ring (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 corrugated bar (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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