A grinding equipment for dry preparation of ultrafine kaolin

Abstract

This invention relates to the field of grinding equipment technology, and specifically discloses a grinding equipment for the dry preparation of ultrafine kaolin, comprising an equipment base, a grinding device fixedly connected to the top of the equipment base, a feed pipe connected to the side of the grinding device, a cooling device fixedly connected to the end of the grinding device away from the feed pipe, a fixed end of a drive motor fixedly connected to the top of the cooling device, a reversing component fixedly connected to the side of the grinding scraper, the side of the reversing component fixedly connected to the side of the inner wall of the grinding outer tube, the side of the grinding outer tube communicating with the side of the feed pipe, and the bottom of the grinding outer tube fixedly connected to the top of the equipment base. Raw materials are introduced into the interior of the grinding outer tube through the feed pipe. This grinding equipment for the dry preparation of ultrafine kaolin achieves the purpose of heat dissipation for the internal raw materials.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a grinding equipment for the dry preparation of ultrafine kaolin. Background Technology

[0002] Kaolin, as an important non-metallic mineral material, is widely used in ceramics, papermaking, coatings, rubber, plastics, catalysts, and high-end composite materials. With the technological upgrading of downstream industries, increasingly higher requirements are being placed on the fineness, particle size distribution, whiteness, chemical purity, and surface activity of kaolin products. In particular, ultrafine kaolin (typically referring to particle sizes D97 ≤ 10μm, or even D90 ≤ 2μm) has significantly increased its application value in high-performance coatings, advanced paper coatings, special ceramics, and polymer composite materials due to its larger specific surface area, higher surface activity, and better dispersibility and reinforcing properties. This process utilizes water or solvents as a medium in equipment such as sand mills and stirred mills. Its advantages include relatively high grinding efficiency, fine and uniform particle size distribution, and ease of classification. However, its disadvantages are also significant: the process is lengthy, involving dehydration and drying (extremely energy-intensive, accounting for over 60% of total production costs), potential agglomeration after drying requiring further deagglomeration, and the generation of large amounts of wastewater, posing a significant environmental burden. Direct crushing and classification of the dried raw materials are also crucial. Its advantages lie in its simple process flow, zero wastewater discharge, small footprint, and theoretically lower investment and production costs (especially energy consumption), which aligns better with the green and low-carbon development direction of modern industry. Therefore, developing efficient dry ultrafine grinding technology has become an important trend in the mineral processing field.

[0003] Some components of kaolin (such as bound water and organic matter) are sensitive to temperature. During dry continuous grinding, a large amount of mechanical energy is converted into heat energy, causing a rapid increase in the system temperature. If the temperature is not effectively controlled, it may cause changes in the material properties. Summary of the Invention

[0004] To solve the above technical problems, the present invention is achieved through the following technical solution: a grinding device for dry preparation of ultrafine kaolin, comprising a base, a grinding device fixedly connected to the top of the base, a feed pipe connected to the side of the grinding device, a cooling device fixedly connected to the end of the grinding device away from the feed pipe, a fixed end of a drive motor fixedly connected to the top of the cooling device, the drive end of the drive motor being connected to the input end of the grinding device via a belt, and the bottom of the cooling device being fixedly connected to the top of the base;

[0005] The grinding device includes a grinding outer tube, a filter assembly rotatably connected to the inner wall of the grinding outer tube, a grinding scraper rotatably connected to the inner wall of the filter assembly, a reversing assembly fixedly connected to the side of the grinding scraper, the side of the reversing assembly fixedly connected to the inner wall of the grinding outer tube, the side of the grinding outer tube communicating with the side of the feed pipe, and the bottom of the grinding outer tube fixedly connected to the top of the equipment base. Raw materials are introduced into the interior of the grinding outer tube through the feed pipe. The drive motor is started, and the drive motor drives the grinding device to rotate via a belt drive, thus refining and pulverizing the raw materials. The rotation of the filter assembly drives the reversing assembly to rotate, which in turn drives the grinding scraper to rotate. The filter assembly and the grinding scraper rotate in opposite directions, facilitating bidirectional compression and pulverization of the raw materials under the combined action of the filter assembly and the grinding scraper. A cooling device removes heat from the interior of the grinding outer tube, allowing for timely cooling of the raw materials during the refining process and preventing accumulation due to heat, thereby facilitating the pulverization and refining of the raw materials.

[0006] Preferably, the filter assembly includes a positive base plate, a separation tube fixedly connected to the side of the positive base plate, a filter hole opened at the top of the separation tube, a crushing inner tube fixedly connected to the side of the positive base plate inside the separation tube, a rotation hole opened on the side of the positive base plate, a side of the positive base plate fixedly connected to the side of the reversing assembly, and a top of the positive base plate rotatably connected to the inner wall side of the grinding outer tube.

[0007] Preferably, the inner crushing tube includes a rotating cylinder with a discharge hole on its side. A crushing plate is fixedly connected to the inner wall of the rotating cylinder. The side of the rotating cylinder is fixedly connected to the side of the positive base plate. The rotating cylinder is positioned inside the positive base plate. The rotation of the positive base plate drives the rotating cylinder to rotate, which in turn drives the crushing plate to beat and crush the raw material. The raw material is then discharged through the discharge hole, thus performing primary refinement. The raw material is further refined step by step through the combined extrusion of the separation tube and the rotating cylinder, and then discharged through the filter holes. This allows the refined raw material to move from the center of the outer grinding tube to the inner wall of the outer grinding tube. During this movement, the centrifugal force of the rotating cylinder and the separation tube causes the raw material to be thrown out. Compared with traditional separation methods, this reduces the possibility of clogging. The arc-shaped arrangement of the filter holes facilitates the extrusion of the raw material by squeezing it along the inner wall of the filter holes.

[0008] Preferably, the grinding scraper includes a reverse base plate, an upper scraper is fixedly connected to the side of the reverse base plate, a lower scraper is fixedly connected to the side of the upper scraper, a connecting pipe is fixedly connected to the side of the reverse base plate, the side of the reverse base plate is rotatably connected to the inner wall of the grinding outer tube, the upper and lower scrapers are disposed on the side of the rotating cylinder and slidably connected to the side of the rotating cylinder, and the upper and lower scrapers are disposed on the inner wall of the separation tube and slidably connected to the inner wall of the separation tube.

[0009] Preferably, the reversing assembly includes a reversing bracket, a driving gear rotatably connected to the side of the reversing bracket, a discharge pipe penetrating and fixedly connected to the side of the driving gear, a fixed end of an electric piston fixedly connected to the inner wall of the discharge pipe, a movable end of the electric piston slidably connected to the inner wall of the discharge pipe, a conveying pipe rotatably connected to the inner wall of the discharge pipe, a driven gear meshing with the side of the reversing bracket, a gear ring adapted to the driven gear fixedly connected to the side of the forward base plate, a side of the driving gear fixedly connected to the side of the connecting pipe, and a side of the conveying pipe communicating with the side of the feed pipe. Rotation of the reverse base plate drives the upper and lower scrapers to rotate, and the upper and lower scrapers slide along the outer side of the rotating cylinder and the inner wall of the separating pipe, thereby further refining the raw material passing through the discharge hole. The material is pulverized and extruded along the inner wall of the filter holes by the guiding and squeezing action of the upper and lower scrapers, facilitating the discharge of the refined material. The combined action of the upper and lower scrapers guides and squeezes the material, making it easier to extrude. During material introduction, the material enters the conveying pipe along the feed pipe. The electric piston is activated, and its retraction causes the material to pass through the side of the discharge pipe and enter the center of the rotating cylinder. The rotating connecting pipe drives the discharge pipe to rotate, which in turn drives the drive gear, which in turn drives the driven gear, which in turn drives the forward base plate. This causes the reverse and forward base plates to rotate in opposite directions, facilitating double compression and pulverization of the material, and its gradual discharge, thus ensuring the fine pulverization of the material.

[0010] Preferably, the cooling device includes a rotating tube with a water inlet at the top. A water supply fan blade is fixedly connected to the top of the rotating tube on one side of the water inlet. A return flow assembly is fixedly connected to the side of the rotating tube. The side of the rotating tube is fixedly connected to the side of the reverse base plate. The end of the rotating tube away from the return flow assembly is fixedly connected to the drive shaft of the drive motor via a belt drive device.

[0011] Preferably, the return assembly includes a water supply pipe, a water inlet pipe connected to the side of the water supply pipe, a return vane fixedly connected to the side of the water supply pipe, a return pipe fixedly connected to the side of the return vane, a return hole opened at the top of the return pipe, a side of the return pipe fixedly connected to the side of the rotating pipe, the water supply pipe disposed inside the connecting pipe and rotatably connected to the connecting pipe, the return vane disposed inside the connecting pipe and rotatably connected to the connecting pipe, the drive shaft of the drive motor drives the rotating pipe to rotate via a belt drive device, the rotation of the rotating pipe drives the water supply fan blade to rotate, and the rotation of the water supply fan blade drives the water... Water is introduced into the inlet pipe through the inlet hole, then enters the delivery pipe and flows back inside the connecting pipe. As the rotating pipe rotates, it drives the return pipe to rotate, which in turn drives the return blades to rotate. The rotation of the return blades guides the water flow inside the connecting pipe along the side of the return blades and back along the return hole, thus allowing it to flow again with the side of the rotating pipe. This facilitates the circulation of water inside the connecting pipe, enabling timely cooling of the raw materials during the crushing and refining process and preventing the accumulation of raw materials due to excessive temperature.

[0012] This invention provides a grinding apparatus for the dry preparation of ultrafine kaolin. It has the following beneficial effects:

[0013] 1. This dry-process grinding equipment for producing ultrafine kaolin features an outer grinding tube. Raw materials are introduced into the outer grinding tube through a feed pipe. Upon starting the drive motor, the motor drives the grinding device to rotate via a belt drive, refining and pulverizing the raw materials. The rotation of the filter assembly drives the reversing assembly, which in turn drives the grinding scraper. The filter assembly and the grinding scraper rotate in opposite directions, causing the raw materials to undergo bidirectional compression and pulverization under their combined action. A cooling device dissipates heat from inside the outer grinding tube, allowing the raw materials to cool promptly during the refining process and preventing accumulation due to heat, thus facilitating the refining and pulverization of the raw materials.

[0014] 2. This dry-process grinding equipment for producing ultrafine kaolin features a separation tube. The rotating base plate drives a rotating drum, which in turn drives a crushing plate to pulverize the raw material. The material is then discharged through a discharge hole, achieving primary refining. Through the combined extrusion of the separation tube and rotating drum, the raw material can be progressively refined and pulverized. The refined material is then discharged through filter holes, moving from the center of the outer grinding tube to the inner wall. During this movement, the centrifugal force of the rotating drum and separation tube propels the material out, reducing the possibility of clogging compared to traditional separation methods. The filter holes are arranged in an arc shape, facilitating the extrusion of the material along its inner wall.

[0015] 3. This dry-process grinding equipment for producing ultrafine kaolin features a lower scraper. The rotation of the reverse bottom plate drives the upper and lower scrapers to rotate. The upper and lower scrapers slide along the outer side of the rotating cylinder and the inner wall of the separation tube, further refining and pulverizing the raw material passing through the discharge hole. The material is then extruded along the inner wall of the filter holes through a guiding and squeezing action, facilitating the removal of the refined material. Under the combined action of the upper and lower scrapers, the raw material is guided, squeezed, and extruded. When the raw material is introduced, it enters the conveying pipe along the feed pipe. The electric piston is activated, and its contraction causes the raw material to enter the center of the rotating cylinder through the side of the discharge pipe. The rotation of the connecting pipe drives the discharge pipe to rotate, which in turn drives the drive gear to rotate. The drive gear then drives the driven gear to rotate, which in turn drives the forward bottom plate to rotate. This causes the reverse bottom plate to rotate in the opposite direction to the forward bottom plate, thus achieving double squeezing and pulverizing of the raw material and its gradual removal, facilitating the fine pulverization of the material.

[0016] 4. This dry-process grinding equipment for producing ultrafine kaolin features a rotating tube. The drive shaft of the motor drives the rotating tube via a belt drive, which in turn rotates the water delivery fan blades, drawing water from the inlet hole into the inlet pipe. The water then enters the delivery pipe through the inlet pipe and flows back within the connecting pipe. The rotating tube's rotation drives the return pipe, which in turn rotates the return blades. These blades guide the water flow inside the connecting pipe along its side and back through the return hole, re-merging with the side of the rotating tube. This design allows the water to circulate within the connecting pipe, facilitating timely cooling of the raw materials during the grinding and refining process and preventing overheating and material accumulation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the grinding equipment used in the dry preparation of ultrafine kaolin according to the present invention.

[0018] Figure 2 This is a schematic diagram of the grinding device of the present invention;

[0019] Figure 3 This is a schematic diagram of the filter component structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the crushing inner tube structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the grinding scraper structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the commutation component structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the cooling device structure of the present invention;

[0024] Figure 8 This is a schematic diagram of the recirculation component structure of the present invention.

[0025] In the diagram: 1. Equipment base; 2. Grinding device; 3. Feed pipe; 4. Cooling device; 5. Drive motor; 201. Grinding outer tube; 202. Filter assembly; 203. Grinding scraper; 204. Reversing assembly; 2021. Forward base plate; 2022. Separation pipe; 2023. Filter hole; 2024. Crushing inner tube; 2025. Rotating hole; 20241. Rotating cylinder; 20242. Discharge hole; 20243. Crushing plate; 2031. Reverse base plate; 20 32. Upper scraper; 2033. Lower scraper; 2034. Connecting pipe; 2041. Reversing bracket; 2042. Drive gear; 2043. Discharge pipe; 2044. Electric piston; 2045. Conveying pipe; 2046. Driven gear; 401. Rotating pipe; 402. Water inlet; 403. Water supply fan blade; 404. Return assembly; 4041. Water supply pipe; 4042. Water inlet pipe; 4043. Return blade; 4044. Return pipe; 4045. Return hole. Detailed Implementation

[0026] 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.

[0027] For the first embodiment, please refer to... Figures 1-2 The present invention provides a technical solution: a grinding device for dry preparation of ultrafine kaolin, comprising a base 1, a grinding device 2 fixedly connected to the top of the base 1, a feed pipe 3 connected to the side of the grinding device 2, a cooling device 4 fixedly connected to the end of the grinding device 2 away from the feed pipe 3, a fixed end of a drive motor 5 fixedly connected to the top of the cooling device 4, the drive end of the drive motor 5 being connected to the input end of the grinding device 2 via a belt, and the bottom of the cooling device 4 being fixedly connected to the top of the base 1.

[0028] The grinding device 2 includes a grinding outer tube 201, a filter assembly 202 rotatably connected to the inner wall of the grinding outer tube 201, a grinding scraper 203 rotatably connected to the inner wall of the filter assembly 202, a reversing assembly 204 fixedly connected to the side of the grinding scraper 203, the side of the reversing assembly 204 fixedly connected to the inner wall of the grinding outer tube 201, the side of the grinding outer tube 201 communicating with the side of the feed pipe 3, and the bottom of the grinding outer tube 201 fixedly connected to the top of the equipment base 1.

[0029] The raw material is introduced into the grinding outer tube 201 through the feed pipe 3. The drive motor 5 is started, and the drive motor 5 drives the grinding device 2 to rotate through the belt drive device to refine and crush the raw material. The rotation of the filter component 202 drives the reversing component 204 to rotate, and the rotation of the reversing component 204 drives the grinding scraper 203 to rotate. The filter component 202 and the grinding scraper 203 are in opposite rotation directions, which facilitates the bidirectional extrusion and crushing of the raw material under the combined action of the filter component 202 and the grinding scraper 203. The cooling device 4 removes heat from the inside of the grinding outer tube 201, which facilitates timely cooling of the raw material during the refining process, thereby preventing the accumulation of raw material due to heat and facilitating the crushing and refining of the raw material.

[0030] For the second embodiment, please refer to... Figures 1-4 Based on the first embodiment, the present invention provides a technical solution: the filter assembly 202 includes a positive base plate 2021, a separation tube 2022 is fixedly connected to the side of the positive base plate 2021, a filter hole 2023 is opened at the top of the separation tube 2022, a crushing inner tube 2024 is fixedly connected to the side of the positive base plate 2021 at a position inside the separation tube 2022, a rotation hole 2025 is opened on the side of the positive base plate 2021, the side of the positive base plate 2021 is fixedly connected to the side of the reversing assembly 204, and the top of the positive base plate 2021 is rotatably connected to the inner wall side of the grinding outer tube 201.

[0031] The inner crushing tube 2024 includes a rotating cylinder 20241. A discharge hole 20242 is provided on the side of the rotating cylinder 20241. A crushing plate 20243 is fixedly connected to the inner wall side of the rotating cylinder 20241. The side of the rotating cylinder 20241 is fixedly connected to the side of the positive base plate 2021. The rotating cylinder 20241 is located inside the positive base plate 2021.

[0032] The rotation of the base plate 2021 drives the rotating cylinder 20241 to rotate, which in turn drives the crushing plate 20243 to crush the raw material. The raw material is then discharged through the discharge hole 20242, thus performing primary refinement. The raw material is further refined through the combined extrusion of the separation tube 2022, the rotating cylinder 20241, and the grinding scraper 203. The raw material is then discharged through the filter hole 2023. This allows the refined raw material to move from the center of the grinding outer tube 201 to the inner wall of the grinding outer tube 201. During this movement, the centrifugal force of the rotating cylinder 20241 and the separation tube 2022 causes the raw material to be thrown out. Compared with traditional separation methods, this reduces the possibility of clogging. The arc-shaped arrangement of the filter hole 2023 facilitates the extrusion of the raw material by squeezing it along the inner wall of the filter hole 2023.

[0033] Third embodiment, please refer to Figures 1-6 Based on the second embodiment, the present invention provides a technical solution: the grinding scraper 203 includes a reverse base plate 2031, an upper scraper 2032 is fixedly connected to the side of the reverse base plate 2031, a lower scraper 2033 is fixedly connected to the side of the upper scraper 2032, a connecting pipe 2034 is fixedly connected to the side of the reverse base plate 2031, the side of the reverse base plate 2031 is rotatably connected to the side of the inner wall of the grinding outer tube 201, the upper scraper 2032 and the lower scraper 2033 are disposed on the side of the rotating cylinder 20241 and are slidably connected to the side of the rotating cylinder 20241, and the upper scraper 2032 and the lower scraper 2033 are disposed on the inner wall of the separation tube 2022 and are slidably connected to the inner wall of the separation tube 2022.

[0034] The reversing assembly 204 includes a reversing bracket 2041. A drive gear 2042 is rotatably connected to the side of the reversing bracket 2041. A discharge pipe 2043 is passed through and fixedly connected to the side of the drive gear 2042. The fixed end of an electric piston 2044 is fixedly connected to the inner wall of the discharge pipe 2043. The movable end of the electric piston 2044 is slidably connected to the inner wall of the discharge pipe 2043. A conveying pipe 2045 is rotatably connected to the inner wall of the discharge pipe 2043. A driven gear 2046 meshes with the side of the reversing bracket 2041. A gear ring adapted to the driven gear 2046 is fixedly connected to the side of the positive base plate 2021. The side of the drive gear 2042 is fixedly connected to the side of the connecting pipe 2034. The side of the conveying pipe 2045 communicates with the side of the feed pipe 3.

[0035] The rotation of the reverse bottom plate 2031 drives the upper scraper 2032 and lower scraper 2033 to rotate. The upper scraper 2032 and lower scraper 2033 slide along the outer side of the rotating cylinder 20241 and the inner wall of the separation tube 2022, thereby further refining and crushing the raw material passing through the discharge hole 20242. The guiding and squeezing action of the upper scraper 2032 and lower scraper 2033 forces the raw material out along the inner wall of the filter hole 2023, facilitating the discharge of the refined raw material. The combined action of the upper scraper 2032 and lower scraper 2033 guides and squeezes the raw material, facilitating its extrusion. During raw material introduction, the raw material flows along the feed... The material pipe 3 enters the interior of the conveying pipe 2045. The electric piston 2044 is activated. The electric piston 2044 retracts, causing the raw material to pass through the side of the discharge pipe 2043 and enter the center of the rotating cylinder 20241. The connecting pipe 2034 rotates, driving the discharge pipe 2043 to rotate. The rotation of the discharge pipe 2043 drives the drive gear 2042 to rotate. The rotation of the drive gear 2042 drives the driven gear 2046 to rotate. The rotation of the driven gear 2046 drives the forward base plate 2021 to rotate, thereby causing the reverse base plate 2031 and the forward base plate 2021 to rotate in opposite directions. This facilitates the double extrusion and crushing of the raw material and its gradual discharge, thus facilitating the fine crushing of the raw material.

[0036] For the fourth embodiment, please refer to [link / reference]. Figures 1-8 Based on the third embodiment, the present invention provides a technical solution: the cooling device 4 includes a rotating tube 401, a water inlet hole 402 is provided at the top of the rotating tube 401, a water delivery fan blade 403 is fixedly connected to the top of the rotating tube 401 at one side of the water inlet hole 402, a return flow assembly 404 is fixedly connected to the side of the rotating tube 401, the side of the rotating tube 401 is fixedly connected to the side of the reverse base plate 2031, and the end of the rotating tube 401 away from the return flow assembly 404 is fixedly connected to the drive shaft of the drive motor 5 through a belt drive device.

[0037] The reflux assembly 404 includes a water supply pipe 4041, a water inlet pipe 4042 connected to the side of the water supply pipe 4041, a reflux vane 4043 fixedly connected to the side of the water supply pipe 4041, a reflux pipe 4044 fixedly connected to the side of the reflux vane 4043, a reflux hole 4045 opened at the top of the reflux pipe 4044, a side of the reflux pipe 4044 fixedly connected to the side of the rotating pipe 401, the water supply pipe 4041 being disposed inside the connecting pipe 2034 and rotatably connected to the connecting pipe 2034, and the reflux vane 4043 being disposed inside the connecting pipe 2034 and rotatably connected to the connecting pipe 2034.

[0038] The drive shaft of the drive motor 5 drives the rotating tube 401 to rotate via a belt drive. The rotation of the rotating tube 401 drives the water delivery fan blade 403 to rotate. The rotation of the water delivery fan blade 403 drives water to be introduced into the water inlet pipe 4042 through the water inlet hole 402. The water enters the water delivery pipe 4041 through the water inlet pipe 4042 and flows back into the connecting pipe 2034. During the rotation of the rotating tube 401, the return pipe 4044 is driven to rotate. The rotation of the connecting pipe 2034 drives the return blade 4043 to rotate. The rotation of the return blade 4043 drives the water flow inside the connecting pipe 2034 to be guided along the side of the return blade 4043 and flow back along the return hole 4045, thus re-flowing with the side of the rotating tube 401. This facilitates the circulation of water inside the connecting pipe 2034, which facilitates timely cooling of the raw materials during the crushing and refining process, thereby avoiding the problem of raw materials accumulating due to excessive temperature.

[0039] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A grinding apparatus for the dry preparation of ultrafine kaolin, characterized in that: The equipment includes a base (1), a grinding device (2) is fixedly connected to the top of the base (1), a feed pipe (3) is connected to the side of the grinding device (2), a cooling device (4) is fixedly connected to the end of the grinding device (2) away from the feed pipe (3), a fixed end of a drive motor (5) is fixedly connected to the top of the cooling device (4), the drive end of the drive motor (5) is connected to the input end of the grinding device (2) via a belt, and the bottom of the cooling device (4) is fixedly connected to the top of the base (1). The grinding device (2) includes a grinding outer tube (201), a filter assembly (202) is rotatably connected to the inner wall side of the grinding outer tube (201), a grinding scraper (203) is rotatably connected to the inner wall of the filter assembly (202), a reversing assembly (204) is fixedly connected to the side of the grinding scraper (203), the side of the reversing assembly (204) is fixedly connected to the inner wall side of the grinding outer tube (201), the side of the grinding outer tube (201) is connected to the side of the feed pipe (3), and the bottom of the grinding outer tube (201) is fixedly connected to the top of the equipment base (1). The filter assembly (202) includes a positive base plate (2021), and a crushing inner tube (2024) is fixedly connected to the side of the positive base plate (2021) at a position inside the separation tube (2022). The inner crushing tube (2024) includes a rotating cylinder (20241), a discharge hole (20242) is provided on the side of the rotating cylinder (20241), and a crushing plate (20243) is fixedly connected to the inner wall side of the rotating cylinder (20241). The grinding scraper (203) includes a reverse base plate (2031), an upper scraper (2032) is fixedly connected to the side of the reverse base plate (2031), a lower scraper (2033) is fixedly connected to the side of the upper scraper (2032), and a connecting pipe (2034) is fixedly connected to the side of the reverse base plate (2031). The reversing assembly (204) includes a reversing bracket (2041), a drive gear (2042) is rotatably connected to the side of the reversing bracket (2041), a discharge pipe (2043) is connected through and fixedly to the side of the drive gear (2042), a fixed end of an electric piston (2044) is fixedly connected to the inner wall side of the discharge pipe (2043), the movable end of the electric piston (2044) is slidably connected to the inner wall of the discharge pipe (2043), a conveying pipe (2045) is rotatably connected to the inner wall of the discharge pipe (2043), and a driven gear (2046) is meshed with the side of the reversing bracket (2041). The cooling device (4) includes a rotating tube (401), with a water inlet (402) at the top of the rotating tube (401), a water delivery fan blade (403) fixedly connected to the top of the rotating tube (401) on one side of the water inlet (402), and a return flow assembly (404) fixedly connected to the side of the rotating tube (401). The side of the rotating tube (401) is fixedly connected to the side of the reverse base plate (2031), and the end of the rotating tube (401) away from the return assembly (404) is fixedly connected to the drive shaft of the drive motor (5) through a belt drive device. The reflux assembly (404) includes a water supply pipe (4041), a water inlet pipe (4042) connected to the side of the water supply pipe (4041), a reflux vane (4043) fixedly connected to the side of the water supply pipe (4041), a reflux pipe (4044) fixedly connected to the side of the reflux vane (4043), and a reflux hole (4045) opened at the top of the reflux pipe (4044). The rotating base plate (2021) drives the rotating cylinder (20241) to rotate. The rotating cylinder (20241) drives the crushing plate (20243) to crush the raw material. The raw material is discharged through the discharge hole (20242), thus refining the raw material. The raw material is further refined step by step by the combined extrusion of the separation tube (2022), the rotating cylinder (20241), and the grinding scraper (203). The raw material is discharged through the filter hole (2023), so that the refined raw material moves from the center of the grinding outer tube (201) to the inner wall side of the grinding outer tube (201). During the movement, the raw material is thrown out by the centrifugal force of the rotating cylinder (20241) and the separation tube (2022). The arc arrangement of the filter hole (2023) facilitates the extrusion of the raw material along the inner wall of the filter hole (2023). The rotating reverse bottom plate (2031) drives the upper scraper (2032) and lower scraper (2033) to rotate. The upper scraper (2032) and lower scraper (2033) slide along the outer side of the rotating cylinder (20241) and the inner wall of the separation tube (2022), thereby further refining and crushing the raw material passing through the discharge hole (20242). The raw material is squeezed out along the inner wall of the filter hole (2023) by the guiding and squeezing action of the upper scraper (2032) and lower scraper (2033). The raw material is guided and squeezed under the combined action of the upper scraper (2032) and lower scraper (2033). During raw material introduction, the raw material enters the interior of the conveying pipe (2045) along the feed pipe (3). The electric piston (2022) is activated, and the electric piston (2044) contracts, causing the raw material to pass through the side of the discharge pipe (2043) and enter the center position of the rotating cylinder (2041). The connecting pipe (2034) rotates, driving the discharge pipe (2043) to rotate. The rotation of the discharge pipe (2043) drives the drive gear (2042) to rotate. The rotation of the drive gear (2042) drives the driven gear (2046) to rotate. The rotation of the driven gear (2046) drives the forward base plate (2021) to rotate, thereby causing the reverse base plate (2031) and the forward base plate (2021) to rotate in opposite directions, performing double extrusion and crushing on the raw material, and then discharging it step by step. The drive shaft of the drive motor (5) drives the rotating tube (401) to rotate via a belt drive device. The rotation of the rotating tube (401) drives the water delivery fan blades (403) to rotate. The rotation of the water delivery fan blades (403) drives the water to be introduced into the water inlet pipe (4042) through the water inlet hole (402). The water enters the water delivery pipe (4041) through the water inlet pipe (4042) and flows back into the connecting pipe (2034). During the rotation of the rotating tube (401), the water is driven to rotate. The reflux pipe (4044) rotates, and the connecting pipe (2034) rotates, which drives the reflux blade (4043) to rotate. The rotation of the reflux blade (4043) drives the water inside the connecting pipe (2034) to be guided along the side of the reflux blade (4043) and to reflux along the reflux hole (4045), so that it flows again with the side of the rotating pipe (401). The water flows in a circulation inside the connecting pipe (2034), and the raw material is cooled in time during the crushing and refining process.

2. The grinding equipment for dry preparation of ultrafine kaolin as described in claim 1, characterized in that: A separation tube (2022) is fixedly connected to the side of the positive base plate (2021). A filter hole (2023) is opened at the top of the separation tube (2022). A rotation hole (2025) is opened on the side of the positive base plate (2021). The side of the positive base plate (2021) is fixedly connected to the side of the reversing assembly (204). The top of the positive base plate (2021) is rotatably connected to the inner wall side of the grinding outer tube (201).

3. The grinding equipment for dry preparation of ultrafine kaolin as described in claim 2, characterized in that: The side of the rotating cylinder (20241) is fixedly connected to the side of the positive base plate (2021), and the rotating cylinder (20241) is located inside the positive base plate (2021).

4. The grinding equipment for dry preparation of ultrafine kaolin as described in claim 3, characterized in that: The side of the reverse base plate (2031) is rotatably connected to the inner wall of the grinding outer tube (201). The upper scraper (2032) and the lower scraper (2033) are disposed on the side of the rotating cylinder (20241) and are slidably connected to the side of the rotating cylinder (20241). The upper scraper (2032) and the lower scraper (2033) are disposed on the inner wall of the separation tube (2022) and are slidably connected to the inner wall of the separation tube (2022).

5. The grinding equipment for dry preparation of ultrafine kaolin as described in claim 2, characterized in that: The side of the positive base plate (2021) is fixedly connected to a gear ring that is compatible with the driven gear (2046), the side of the driving gear (2042) is fixedly connected to the side of the connecting pipe (2034), and the side of the conveying pipe (2045) is connected to the side of the feed pipe (3).

6. The grinding equipment for dry preparation of ultrafine kaolin as described in claim 5, characterized in that: The side of the return pipe (4044) is fixedly connected to the side of the rotating pipe (401). The water supply pipe (4041) is located inside the connecting pipe (2034) and is rotatably connected to the connecting pipe (2034). The return blade (4043) is located inside the connecting pipe (2034) and is rotatably connected to the connecting pipe (2034).

Images