Screening device for kaolin production

Abstract

The invention relates to the technical field of kaolin screening, and discloses a screening device for kaolin production, which comprises a screening box, a crushing chamber is arranged on the screening box, a filter screen plate is mounted at the bottom of the crushing chamber, and a rotatable guide plate is arranged below the filter screen plate. A plurality of inserting columns distributed at equal intervals are slidably connected into the material guiding plate, a movable U-shaped support is arranged on one side of the screening box, and a rack and a first abutting block are arranged on the U-shaped support. A rotatable magnetic separation drum is arranged below the screening box, and a plurality of material grooves which are circumferentially distributed at equal intervals are formed in the magnetic separation drum, so that the purpose of automatic deflection and discharging of the material guide plate can be achieved, the collision process is prepared, kaolin in the crushing chamber can fall into the material grooves within a period of time, and the working efficiency is improved. The phenomenon that the magnetic separation effect and the magnetic separation efficiency of iron minerals are affected due to the fact that kaolin subjected to magnetic separation in the trough is excessive and less can be avoided.

Description

Technical Field

[0001] This invention relates to the field of kaolin screening technology, specifically a screening device for kaolin production. Background Technology

[0002] Kaolin is a non-metallic mineral, a type of clay and clay rock mainly composed of kaolinite group clay minerals. Because of its white and fine texture, it is also known as dolomite. Pure kaolin is white, fine, and soft, possessing good plasticity and refractoriness. Kaolin has a wide range of applications, primarily in papermaking, ceramics, and refractory materials, and secondarily in coatings, rubber fillers, enamel glazes, and white cement raw materials. Different industries have different particle size requirements for kaolin; for example, papermaking requires ultrafine powder smaller than 2μm, while ceramics require particles of 2-45μm. Screening can achieve precise grading. Kaolin particles contain iron minerals, mainly including magnetite, ilmenite, siderite, and pyrite. These iron minerals are coloring impurities that significantly affect the whiteness of kaolin and need to be removed by magnetic separation.

[0003] Currently, kaolin is crushed and then sieved before being used in magnetic separation equipment to adsorb iron minerals. If no blockage occurs during the sieve feeding process, the magnetic separation equipment can receive a large feed rate, leading to kaolin accumulation and potential magnetic dead zones. This results in incomplete adsorption of iron minerals. Conversely, if blockage occurs during sieve feeding, the magnetic separation equipment receives a smaller feed rate, impacting separation efficiency. Summary of the Invention

[0004] This invention provides a screening device for kaolin production, which can automatically deflect the guide plate to discharge the material. The process preparation allows the kaolin in the crushing chamber to fall into the trough within a certain period, avoiding the phenomenon of excessive or insufficient kaolin in the trough for magnetic separation, thus improving the magnetic separation effect and efficiency of iron minerals. This invention solves the problems mentioned in the background art, such as large feed rates in magnetic separation equipment, easy accumulation of kaolin, and the formation of magnetic dead zones during the magnetic separation process, leading to incomplete adsorption of iron minerals in the kaolin. It also addresses the issues of insufficient feed and reduced magnetic separation efficiency caused by clogging during kaolin screening.

[0005] The present invention provides the following technical solution: a screening device for kaolin production, comprising a screening box, a crushing chamber on the screening box, a filter screen plate installed at the bottom of the crushing chamber, a rotatable guide plate below the filter screen plate, a plurality of equally spaced inserts slidably connected inside the guide plate, and a movable U-shaped support on one side of the screening box, wherein a rack and a first abutment block are respectively provided on the U-shaped support; Below the screening box is a rotatable magnetic separator drum. The magnetic separator drum has several circumferentially distributed material troughs. The material troughs are equipped with rotatable electromagnet adsorption rollers and several movable scraper supports. One end of the magnetic separator drum is fixed with several circumferentially distributed first contact heads.

[0006] As an optional embodiment of the screening device for kaolin production described in this invention, wherein: a mounting block is fixed at the bottom of the crushing chamber, a rotating shaft is rotatably connected to the mounting block, a guide plate is fixed on the rotating shaft, a first torsion spring is connected between the guide plate and the rotating shaft, and a first gear is fixed at one end of the rotating shaft; a sliding bracket is fixed to the side wall of the screening box, and the U-shaped bracket is elastically connected to the sliding bracket by a first spring.

[0007] As an optional embodiment of the screening device for kaolin production described in this invention, the lower end of the insert is connected to a first strip plate, a second spring is connected between the first strip plate and the guide plate, a second abutting block is abutted on the first strip plate, an L-shaped abutting frame is fixed on the second abutting block, and the L-shaped abutting frame is slidably connected to the guide plate through a third spring.

[0008] As an optional embodiment of the screening device for kaolin production described in this invention, an L-shaped striking block is provided below the filter screen plate, a trapezoidal abutment block is fixed on the L-shaped striking block, the trapezoidal abutment block is elastically connected to the U-shaped bracket through a fourth spring, and a plurality of protrusions are provided on the trapezoidal abutment block.

[0009] As an optional embodiment of the screening device for kaolin production described in this invention, the following is provided: a crushing roller is provided in the crushing chamber, both ends of the crushing roller are rotatably connected to the screening box, and a first servo motor is fixed on the screening box. The motor shaft of the first servo motor is fixedly connected to one end of the crushing roller. A sealing plate is slidably connected to the bottom of the crushing chamber, and an electric push rod is fixedly connected to one side of the sealing plate. The electric push rod is fixed on the screening box.

[0010] As an optional embodiment of the screening device for kaolin production described in this invention, both ends of the magnetic separator are rotatably connected to the screening box, and a second servo motor is fixed on the screening box. The motor shaft of the second servo motor is fixedly connected to one end of the magnetic separator. A toothed ring is fixed on one side of the screening box, and a second gear is fixed on one end of the electromagnet adsorption roller. The second gear meshes with the toothed ring.

[0011] As an optional embodiment of the screening device for kaolin production described in this invention, wherein: one end of the scraper bracket is fixed with an abutment rod, the abutment rod is slidably connected to the magnetic separation drum, a fifth spring is connected between the abutment rod and the magnetic separation drum, and a rotatable fourth abutment block is provided inside the screening box, the fourth abutment block being fixed to one end of the electromagnet adsorption roller.

[0012] As an optional embodiment of the screening device for kaolin production described in this invention, the scraper support is provided with a plurality of oscillating plates, a rotating rod is fixed on the oscillating plates, the rotating rod is rotatably connected to the scraper support, and a second torsion spring is connected between the rotating rod and the scraper support. A second strip plate is provided in the material trough, the second strip plate is fixed in the magnetic separation drum, and a plurality of equally spaced strips are fixed on the second strip plate.

[0013] As an optional embodiment of the screening device for kaolin production described in this invention, the bottom of the screening box is fixed with a mounting base, a wiping block is provided above the mounting base, a guide rod is fixed at the lower end of the wiping block, and the guide rod is elastically connected to the mounting base through a sixth spring.

[0014] As an optional embodiment of the screening device for kaolin production described in this invention, wherein: a rectangular block is fixed to one end of the wiping block, a second contact head is abutting on the rectangular block, one end of the second contact head is elastically connected to the screening box through a seventh spring, and an arc-shaped contact strip is fixed to the second contact head.

[0015] The present invention has the following beneficial effects: 1. In this screening device for kaolin production, the crushed kaolin is conveniently screened and filtered through the filter screen plate at the bottom of the crushing chamber, and then falls into the material trough on the magnetic separation drum. The iron minerals are magnetically adsorbed by the electromagnet adsorption roller. The guide plate can rotate at the bottom of the crushing chamber, so that the kaolin particles falling from the filter screen plate come into contact with the guide plate, which can limit the falling range and guide the material, preventing the kaolin from scattering when falling, so that the kaolin particles can fall into the material trough in the magnetic separation drum for magnetic separation. Several first contact heads corresponding to several material troughs can rotate synchronously with the magnetic separation drum. During the rotation, the first contact heads can intermittently contact the U-shaped support. During the contact process, the rack and pinion and the first gear can automatically deflect the guide plate to discharge the material. The contact process allows the kaolin in the crushing chamber to fall into the material trough within a certain period of time, which can avoid the phenomenon of excessive or insufficient kaolin in the material trough, which would affect the magnetic separation effect and efficiency of iron minerals. When the first contact head contacts the trapezoidal contact block, the L-shaped striking block can automatically strike the filter screen plate, which can improve the smoothness of kaolin discharge.

[0016] 2. In this kaolin production screening device, several equally spaced inserts are slidably connected inside the guide plate. When the guide plate is in contact with the lower surface of the filter screen plate, the inserts can be inserted into the corresponding filter holes on the filter screen plate, which can clean the blockage in the filter holes and improve the smoothness of kaolin screening. The sealing plate slidably connected to the crushing chamber can be controlled by an electric push rod to move horizontally when the feeding stops, which can temporarily block the filter screen plate. This prevents kaolin from falling onto the guide plate and hindering the reset when the guide plate resets and the inserts are inserted into the filter holes. When the inserts are just inserted into the filter holes of the filter screen plate, the guide plate can be unblocked, allowing the inserts to clear the blockage in the filter holes of the filter screen plate into the crushing chamber for crushing. When the U-shaped support moves upward, the first contact block and the L-shaped contact frame can be made to contact each other, so that the L-shaped contact frame can drive the second contact block to release from contact with the first strip plate. This causes the insert to automatically disengage from the filter hole of the filter screen plate and retract into the guide plate, so that the kaolin crushed in the crushing chamber can be screened and discharged through the filter hole of the filter screen plate. At the same time, it can avoid obstructing the rotation of the guide plate.

[0017] 3. In this screening device for kaolin production, a toothed ring fixed on one side of the screening box can mesh with the second gear on the electromagnet adsorption roller. This causes the electromagnet adsorption roller to rotate automatically in the material trough during the rotation of the magnetic separation drum, increasing the adsorption area of ​​ferrites. This allows the iron minerals in the kaolin to be distributed on the surface of the electromagnet adsorption roller, preventing the iron minerals from accumulating on the electromagnet adsorption roller and affecting the adsorption effect of ferrites. At the same time, the scraper bracket can move back and forth in the material trough during the rotation of the electromagnet adsorption roller, making it easy to scrape the kaolin accumulated in the material trough to a lower position, reducing the thickness of the kaolin magnetic separation and the dead angle of the electromagnet adsorption roller for adsorption of iron minerals, thereby improving the magnetic separation effect of kaolin. When the several oscillating blades set by the scraper bracket are deflected by the resistance, they can move the kaolin in the trough for magnetic separation, improve the fluidity of the kaolin, and further increase the contact area between the electromagnet adsorption roller and the kaolin, which greatly improves the magnetic separation effect on iron minerals. Through the wiping block set at the bottom of the screening box, after the electromagnet adsorption roller is de-energized and the adsorbed iron minerals are discharged from the trough, the wiping block can automatically move up to contact the electromagnet adsorption roller. During the rotation of the electromagnet adsorption roller, the wiping block can wipe away the remaining impurities on the electromagnet adsorption roller, which can improve the effect of removing iron minerals from the kaolin. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a cross-sectional view of the structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the screening box structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal structure of the screening box of the present invention.

[0022] Figure 5 This is a schematic diagram of the magnetic separation drum structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the scraper support structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the internal structure of the guide plate of the present invention.

[0025] Figure 8 for Figure 4 A magnified view of a portion of point A in the middle.

[0026] Figure 9 for Figure 4 A magnified view of a portion of point B in the middle.

[0027] In the diagram: 1. Screening box; 2. Crushing chamber; 3. Filter screen plate; 4. Guide plate; 5. Insert column; 6. U-shaped bracket; 7. Rack; 8. First contact block; 9. Magnetic separator drum; 10. Feed trough; 11. Electromagnetic adsorption roller; 12. First contact head; 13. Scraper bracket; 14. Mounting block; 15. Rotating shaft; 16. First torsion spring; 17. First gear; 18. Sliding bracket; 19. First spring; 20. Seventh spring; 21. First strip plate; 22. Second spring; 23. Second contact block; 24. L-shaped contact frame; 25. Third spring; 26. Arc-shaped contact. 27. L-shaped striking block; 28. Trapezoidal abutment block; 29. ​​Fourth spring; 30. Protrusion; 31. Crushing roller; 32. First servo motor; 33. Second servo motor; 34. Gear ring; 35. Second gear; 36. Abutment rod; 37. Fifth spring; 38. Fourth abutment block; 39. Swinging plate; 40. Rotating rod; 41. Second torsion spring; 42. Second strip plate; 43. Strip plate; 44. Mounting base; 45. Wiping block; 46. Guide rod; 47. Sixth spring; 48. Rectangular block; 49. Second abutment head; 50. Sealing plate; 51. Electric push rod. Detailed Implementation

[0028] 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, and 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.

[0029] Example 1, please refer to Figures 1 to 9 A screening device for kaolin production includes a screening box 1, a crushing chamber 2 on the screening box 1, a filter screen plate 3 installed at the bottom of the crushing chamber 2, a rotatable guide plate 4 below the filter screen plate 3, a number of equally spaced inserts 5 slidably connected inside the guide plate 4, and a movable U-shaped support 6 on one side of the screening box 1, with a rack 7 and a first abutting block 8 respectively installed on the U-shaped support 6. Below the screening box 1 is a rotatable magnetic separator drum 9. The magnetic separator drum 9 has several circumferentially distributed material troughs 10. The material troughs 10 are equipped with rotatable electromagnet adsorption rollers 11 and several movable scraper supports 13. One end of the magnetic separator drum 9 is fixed with several circumferentially distributed first contact heads 12.

[0030] A mounting block 14 is fixed at the bottom of the crushing chamber 2. A rotating shaft 15 is rotatably connected to the mounting block 14. A guide plate 4 is fixed on the rotating shaft 15. A first torsion spring 16 is connected between the guide plate 4 and the rotating shaft 15. A first gear 17 is fixed at one end of the rotating shaft 15. A sliding bracket 18 is fixed on the side wall of the screening box 1. A U-shaped bracket 6 is elastically connected to the sliding bracket 18 through a first spring 19.

[0031] The lower end of the insert 5 is connected to a first strip plate 21. A second spring 22 is connected between the first strip plate 21 and the guide plate 4. A second abutting block 23 is abutted on the first strip plate 21. An L-shaped abutting frame 24 is fixed on the second abutting block 23. The L-shaped abutting frame 24 is slidably connected to the guide plate 4 through a third spring 25.

[0032] An L-shaped striking block 27 is provided below the filter screen plate 3. A trapezoidal abutment block 28 is fixed on the L-shaped striking block 27. The trapezoidal abutment block 28 is elastically connected to the U-shaped bracket 6 through the fourth spring 29, and several protrusions 30 are provided on the trapezoidal abutment block 28.

[0033] A crushing roller 31 is installed inside the crushing chamber 2. Both ends of the crushing roller 31 are rotatably connected to the screening box 1. A first servo motor 32 is fixed on the screening box 1. The motor shaft of the first servo motor 32 is fixedly connected to one end of the crushing roller 31. A sealing plate 50 is slidably connected to the bottom of the crushing chamber 2. An electric push rod 51 is fixedly connected to one side of the sealing plate 50. The electric push rod 51 is fixed on the screening box 1.

[0034] refer to Figures 1 to 9 Large kaolin particles are fed into the crushing chamber 2. The first servo motor 32 drives the crushing roller 31 to rotate, further crushing the kaolin. When the second servo motor 33 drives the magnetic separator drum 9 to rotate, several first contact heads 12 fixed on the magnetic separator drum 9 also rotate synchronously, causing the first contact heads 12 to intermittently contact the U-shaped support 6. When the U-shaped support 6 is contacted and moves vertically on the sliding support 18, the first spring 19 stores force, causing the U-shaped support 6 to drive the first contact block 8 to first contact the L-shaped contact frame 24. The third spring 25 stores force, causing the L-shaped contact frame 24 to drive the second contact block 2... 3. After the first strip plate 21 is released from contact, the second spring 22 releases its elastic force, causing the first strip plate 21 to drive several inserts 5 to disengage from the filter holes of the filter screen plate 3. Then, the U-shaped bracket 6 drives the rack 7 to move upward and mesh with the first gear 17 fixed on the rotating shaft 15, causing the rotating shaft 15 to drive the guide plate 4 to rotate on the mounting block 14 at the bottom of the crushing chamber 2. The first torsion spring 16 stores its force, causing the guide plate 4 to deflect, so that the crushed kaolin particles in the crushing chamber 2 fall downward through the filter screen plate 3. Then, through the deflected guide plate 4, the kaolin particles can accurately flow into the material trough 10 on the magnetic separation drum 9. When the first contact head 12 continues to rotate, it can intermittently contact the protrusion 30 at the bottom of the trapezoidal contact block 28, causing the trapezoidal contact block 28 to slide back and forth on the U-shaped support 6. The fourth spring 29 continuously stores and releases its elasticity, so that the kaolin in the crushing chamber 2 can fall into the material trough 10 within a certain period of time. This can prevent the kaolin in the material trough 10 from being too much or too little, thus affecting the magnetic separation effect and efficiency of the iron mineral. At the same time, the trapezoidal contact block 28 drives the L-shaped striking block 27 to automatically strike the bottom of the filter screen plate 3 continuously, which can improve the smoothness of the kaolin falling through the screen. When the feeding is completed and the guide plate 4 deflects and resets, the sealing plate 50 is moved horizontally by the electric push rod 51. This temporarily seals the filter screen plate 3, so that when the guide plate 4 resets and the insert 5 is inserted into the filter hole, the kaolin will not fall onto the guide plate 4 and obstruct the reset. When the insert 5 is just inserted into the filter hole of the filter screen plate 3, the guide plate 4 can be unsealed, so that the insert 5 can clear the blockage in the filter hole of the filter screen plate 3 into the crushing chamber 2 for crushing.

[0035] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 9 Both ends of the magnetic separator drum 9 are rotatably connected to the screening box 1, and a second servo motor 33 is fixed on the screening box 1. The motor shaft of the second servo motor 33 is fixedly connected to one end of the magnetic separator drum 9. A toothed ring 34 is fixed on one side of the screening box 1, and a second gear 35 is fixed on one end of the electromagnet adsorption roller 11. The second gear 35 and the toothed ring 34 mesh with each other.

[0036] A contact rod 36 is fixed at one end of the scraper bracket 13. The contact rod 36 is slidably connected to the magnetic separation drum 9. A fifth spring 37 is connected between the contact rod 36 and the magnetic separation drum 9. A rotatable fourth contact block 38 is provided inside the screening box 1. The fourth contact block 38 is fixed to one end of the electromagnet adsorption roller 11.

[0037] The scraper support 13 is provided with several swing blades 39, and a rotating rod 40 is fixed on the swing blades 39. The rotating rod 40 is rotatably connected to the scraper support 13, and a second torsion spring 41 is connected between the rotating rod 40 and the scraper support 13. A second strip plate 42 is provided in the material trough 10. The second strip plate 42 is fixed in the magnetic separation drum 9, and several equally spaced strip pieces 43 are fixed on the second strip plate 42.

[0038] refer to Figures 2 to 6When the electromagnet adsorption roller 11 is energized, it generates magnetic force, attracting ferrite to the surface of the magnetic pole. Non-magnetic kaolin particles can be separated when the magnetic separation drum 9 rotates to a certain angle and the material trough 10 tilts downwards. During the rotation of the magnetic separation drum 9, the second gear 35 on the electromagnet adsorption roller 11 rotates on the gear ring 34 on one side of the screening box 1. The transmission ratio between the second gear 35 and the gear ring 34 is large, resulting in a high rotation speed of the electromagnet adsorption roller 11 within the material trough 10. This facilitates the rapid distribution of ferrite on the surface of the electromagnet adsorption roller 11, reducing the accumulation of ferrite. Accumulation affects the magnetic separation effect. When kaolin falls into the trough 10, the rotation of the electromagnet adsorption roller 11 can drive the fourth contact block 38 to rotate synchronously, causing the fourth contact block 38 to contact one end of the contact rod 36 during the rotation. The fifth spring 37 continuously stores and releases its elastic force, causing the contact rod 36 to drive the scraper bracket 13 to move horizontally back and forth in the trough 10. This facilitates scraping the accumulated kaolin in the trough 10 to a lower position, avoiding accumulation during the magnetic separation process. This can reduce the thickness of the kaolin magnetic separation and the dead angle of the electromagnet adsorption roller 11 for iron mineral adsorption, thereby improving the magnetic separation effect of kaolin. Meanwhile, as the scraper support 13 moves, it can drive several oscillating plates 39 to move synchronously, causing the oscillating plates 39 to come into contact with the strip plates 43 on the second strip plate 42 during the movement, causing the oscillating plates 39 to deflect, and the rotating rod 40 fixed on the oscillating plates 39 to rotate on the scraper support 13. The second torsion spring 41 continuously stores and releases its elasticity. When the kaolin comes into contact with the deflected oscillating plates 39, the kaolin can be evenly dispersed during the magnetic separation process, improving its fluidity. This can further increase the contact area between the electromagnet adsorption roller 11 and the kaolin, and further improve the magnetic separation effect on iron minerals.

[0039] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 9 The bottom of the screening box 1 is fixed with a mounting base 44, and a wiping block 45 is provided above the mounting base 44. A guide rod 46 is fixed at the lower end of the wiping block 45, and the guide rod 46 is elastically connected to the mounting base 44 through a sixth spring 47.

[0040] A rectangular block 48 is fixed to one end of the wiping block 45. A second contact head 49 is abutted on the rectangular block 48. One end of the second contact head 49 is elastically connected to the screening box 1 through the seventh spring 20, and an arc-shaped contact strip 26 is fixed on the second contact head 49.

[0041] refer to Figures 2 to 5When the ferrite in the trough 10 is cleaned, the rotation of the magnetic separator drum 9 causes the trough 10 containing kaolin to tilt, allowing the non-magnetic kaolin particles to be quickly discharged. The electromagnet adsorption roller 11 with attached ferrite can move with the magnetic separator drum 9 to the bottom of the screening box 1. When the electromagnet adsorption roller 11 is de-energized, the magnetic force disappears, causing the ferrite to detach from the electromagnet adsorption roller 11. As the electromagnet adsorption roller 11 gradually approaches the wiping block 45, the first contact head 12 comes into contact with the arc-shaped contact strip 26, promoting... The arc-shaped contact strip 26 drives the second contact head 49 to move horizontally on the screening box 1, so that the second contact head 49 abuts against the rectangular block 48 fixed below the wiping block 45. This allows the wiping block 45 to move upward and abut against the surface of the rotating electromagnet adsorption roller 11. The guide rod 46 slides on the mounting base 44, and the sixth spring 47 stores force, so that during the rotation of the electromagnet adsorption roller 11, the wiping block 45 can wipe away the residual impurities on the electromagnet adsorption roller 11, which can improve the effect of removing iron minerals from kaolin.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A screening device for kaolin production, comprising a screening box (1), characterized in that: The screening box (1) is provided with a crushing chamber (2), and a filter screen plate (3) is installed at the bottom of the crushing chamber (2). A rotatable guide plate (4) is provided below the filter screen plate (3). Several equally spaced inserts (5) are slidably connected in the guide plate (4). A movable U-shaped bracket (6) is provided on one side of the screening box (1). A rack (7) and a first contact block (8) are respectively provided on the U-shaped bracket (6). The screening box (1) is provided with a rotatable magnetic separation drum (9) below it. The magnetic separation drum (9) is provided with several circumferentially distributed material troughs (10). The material troughs (10) are provided with rotatable electromagnet adsorption rollers (11) and several movable scraper supports (13). Several circumferentially distributed first contact heads (12) are fixed at one end of the magnetic separation drum (9).

2. The screening device for kaolin production according to claim 1, characterized in that: The bottom of the crushing chamber (2) is fixed with an installation block (14), and a rotating shaft (15) is rotatably connected to the installation block (14). The guide plate (4) is fixed on the rotating shaft (15), and a first torsion spring (16) is connected between the guide plate (4) and the rotating shaft (15). A first gear (17) is fixed at one end of the rotating shaft (15). A sliding bracket (18) is fixed on the side wall of the screening box (1). The U-shaped bracket (6) is elastically connected to the sliding bracket (18) through a first spring (19).

3. The screening device for kaolin production according to claim 1, characterized in that: The lower end of the insert (5) is connected to a first strip plate (21), and a second spring (22) is connected between the first strip plate (21) and the guide plate (4). A second abutting block (23) is abutted on the first strip plate (21), and an L-shaped abutting frame (24) is fixed on the second abutting block (23). The L-shaped abutting frame (24) is slidably connected to the guide plate (4) through a third spring (25).

4. The screening device for kaolin production according to claim 1, characterized in that: The filter screen plate (3) is provided with an L-shaped striking block (27) below it. A trapezoidal abutment block (28) is fixed on the L-shaped striking block (27). The trapezoidal abutment block (28) is elastically connected to the U-shaped bracket (6) through a fourth spring (29). A number of protrusions (30) are provided on the trapezoidal abutment block (28).

5. The screening device for kaolin production according to claim 1, characterized in that: The crushing chamber (2) is equipped with a crushing roller (31), both ends of which are rotatably connected to the screening box (1). A first servo motor (32) is fixed on the screening box (1). The motor shaft of the first servo motor (32) is fixedly connected to one end of the crushing roller (31). A sealing plate (50) is slidably connected to the bottom of the crushing chamber (2). An electric push rod (51) is fixedly connected to one side of the sealing plate (50). The electric push rod (51) is fixed on the screening box (1).

6. The screening device for kaolin production according to claim 1, characterized in that: Both ends of the magnetic separator drum (9) are rotatably connected to the screening box (1), and a second servo motor (33) is fixed on the screening box (1). The motor shaft of the second servo motor (33) is fixedly connected to one end of the magnetic separator drum (9). A toothed ring (34) is fixed on one side of the screening box (1), and a second gear (35) is fixed on one end of the electromagnet adsorption roller (11). The second gear (35) meshes with the toothed ring (34).

7. The screening device for kaolin production according to claim 1, characterized in that: One end of the scraper bracket (13) is fixed with an abutment rod (36), which is slidably connected to the magnetic separation drum (9). A fifth spring (37) is connected between the abutment rod (36) and the magnetic separation drum (9). A rotatable fourth abutment block (38) is provided inside the screening box (1), which is fixed to one end of the electromagnet adsorption roller (11).

8. The screening device for kaolin production according to claim 7, characterized in that: The scraper support (13) is provided with a plurality of oscillating plates (39), and a rotating rod (40) is fixed on the oscillating plate (39). The rotating rod (40) is rotatably connected to the scraper support (13), and a second torsion spring (41) is connected between the rotating rod (40) and the scraper support (13). A second strip plate (42) is provided in the material trough (10). The second strip plate (42) is fixed in the magnetic separation drum (9), and a plurality of equally spaced strips (43) are fixed on the second strip plate (42).

9. The screening device for kaolin production according to claim 1, characterized in that: The bottom of the screening box (1) is fixed with a mounting base (44), and a wiping block (45) is provided above the mounting base (44). A guide rod (46) is fixed at the lower end of the wiping block (45), and the guide rod (46) is elastically connected to the mounting base (44) through a sixth spring (47).

10. The screening device for kaolin production according to claim 9, characterized in that: One end of the wiping block (45) is fixed with a rectangular block (48), and a second contact head (49) is abutted on the rectangular block (48). One end of the second contact head (49) is elastically connected to the screening box (1) through a seventh spring (20), and an arc-shaped contact strip (26) is fixed on the second contact head (49).

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