Flour mill for producing superfine ground calcium carbonate

Abstract

The invention provides a pulverizer for superfine ground calcium carbonate production, and relates to the field of calcium carbonate production.The pulverizer comprises a pulverizing box, the lower portion of the pulverizing box is fixedly communicated with a grinding box, the bottom end of the grinding box is fixedly connected with a driving box, the interior of the pulverizing box is slidably connected with a screening plate, and the interior of the pulverizing box is rotatably connected with a transmission rotating shaft; vibration mechanisms are arranged at the two ends of the transmission rotating shaft correspondingly, and a driving mechanism used for driving the upper grinding disc and the lower grinding disc is arranged in the driving box. By arranging the grinding box, the screening plate, the vibrating mechanism, the driving mechanism and the like, the device can perform multi-stage screening and automatic recovery when producing superfine heavy calcium carbonate powder, so that not only are the processing precision and the production efficiency of the superfine heavy calcium carbonate powder improved, but also full utilization of materials is realized, the production cost is reduced, and the production efficiency of the superfine heavy calcium carbonate powder is improved. The service life of the device is prolonged, and good equipment support is provided for the production of superfine heavy calcium carbonate.

Description

Technical Field

[0001] This invention relates to a grinding mill, specifically a grinding mill for producing ultrafine heavy calcium carbonate, belonging to the field of calcium carbonate production technology. Background Technology

[0002] Ultrafine heavy calcium carbonate powder is a fine powder with high whiteness, made from natural minerals such as calcite and limestone through a fine ultrafine grinding process. The particle size of this powder typically ranges from 400 mesh to 3000 mesh, exhibiting extremely fine physical properties. Ultrafine heavy calcium carbonate powder possesses excellent properties in many aspects, including chemical stability, odorlessness, tastelessness, extremely high whiteness, and uniform particle size distribution. Due to its unique physical and chemical properties, ultrafine heavy calcium carbonate powder is widely used in various industrial fields, especially in the production of plastic composite materials and high-end coatings.

[0003] According to patent CN111545322B, a grinding mill for the production of heavy calcium carbonate is disclosed, which includes a feeding port opened at the top of the grinding mill body, a feeding cylinder connected to the feeding port on the outer side of the top of the grinding mill body, a first arc-shaped through groove opened along the periphery on the cylinder wall of the feeding cylinder, the first through groove being an arc, and a circular filter cloth provided on the outer side of the feeding cylinder.

[0004] The above-mentioned solution can effectively block dust and reduce dust pollution by covering the feeding cylinder with the installation frame and filter cloth. However, it is difficult to perform multi-stage screening and automatic recycling of raw materials during implementation, which can easily affect the processing accuracy of the device for ultrafine heavy calcium carbonate powder. Furthermore, over-grinding can increase equipment wear and energy waste, and reduce the utilization efficiency of material production. Therefore, we provide a grinding mill for ultrafine heavy calcium carbonate production to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a grinding mill for the production of ultrafine heavy calcium carbonate in order to solve the above-mentioned problems. This addresses the issue in the prior art where it is inconvenient to perform multi-stage screening and recycling of materials when grinding ultrafine heavy calcium carbonate powder, which affects the production accuracy of the equipment.

[0006] This invention is achieved through the following technical solution: a grinding mill for producing ultrafine heavy calcium carbonate, comprising a grinding chamber, a polishing chamber fixedly connected to the lower part of the grinding chamber, a drive box fixedly connected to the bottom end of the polishing chamber, a slidably connected sieve plate inside the grinding chamber, a rotatably connected drive shaft inside the grinding chamber, vibration mechanisms provided at both ends of the drive shaft, an upper polishing disc and a lower polishing disc rotatably mounted inside the polishing chamber, a drive mechanism for driving the upper polishing disc and the lower polishing disc inside the drive box, the vibration mechanism comprising a transmission frame and an eccentric wheel, the transmission frame and the eccentric wheel being adapted to each other, the eccentric wheel being fixedly mounted on the surface of the drive shaft, the drive mechanism comprising a limiting connecting frame fixedly mounted inside the drive box, a drive rod rotatably connected inside the limiting connecting frame, a drive bevel gear fixedly connected to the end of the drive rod, and driven bevel gear one and driven bevel gear two respectively meshing with the outside of the drive bevel gear.

[0007] Preferably, a transmission sleeve is fixedly connected to the top surface of the driven bevel gear one, and a transmission column is fixedly connected inside the driven bevel gear two. The transmission column rotates inside the transmission sleeve, and the transmission sleeve and the transmission column are rotatably connected to the two ends of the limiting connection frame, respectively.

[0008] Preferably, a set of fixed connecting rods is fixedly connected to the top of the transmission column, and the end of each fixed connecting rod is fixedly connected to the upper grinding disc.

[0009] Preferably, the outer surface of the limiting connection frame is fixedly connected to two support rods, and each support rod is fixedly connected to the inner wall of the drive box.

[0010] Preferably, two support plates are fixedly connected to the outer surface of the transmission frame, the sieve plate is fixedly connected to the corresponding support plate, and two limiting blocks are fixedly connected to the inner wall of the crushing box, with the two support plates slidably connected to the two limiting blocks respectively.

[0011] Preferably, a cleaning plate is fixedly connected to the outer surface of the transmission sleeve, the cleaning plate is rotatably connected to the inner bottom wall of the grinding box, and a recovery pipe is fixedly connected to the outer surface of the grinding box.

[0012] Preferably, two exhaust fans are fixedly installed on the outer surface of the grinding box, and a collection box is movably installed at the output end of each exhaust fan. A ventilation duct is provided on the top surface of the grinding box.

[0013] Preferably, a support base is fixedly connected to the bottom of the drive box, a drive motor is fixedly installed on the outer surface of the drive box, and the drive rod is fixedly connected to the output shaft of the drive motor.

[0014] Preferably, two crushing rollers are rotatably installed inside the crushing box, and a transmission gear is fixedly connected to the end of each crushing roller. The two transmission gears mesh with each other. A crushing motor is fixedly installed outside the crushing box. The output shaft of the crushing motor is fixedly connected to the crushing rollers. The transmission shaft and the output shaft of the crushing motor are connected by a belt and a pulley.

[0015] Preferably, a controller is fixedly installed on the outer surface of the crushing box, a bucket elevator is provided outside the crushing box, the recovery pipe is fixedly connected to the bucket elevator, and a return pipe is fixedly connected to the outer surface of the crushing box.

[0016] This invention provides a grinding mill for producing ultrafine heavy calcium carbonate, which has the following beneficial effects:

[0017] 1. This application, by incorporating components such as a grinding box, sieve plate, vibration mechanism, and drive mechanism, enables the device to perform multi-stage sieving and automatic recovery during the production of ultrafine heavy calcium carbonate powder. This not only improves the processing accuracy and production efficiency of ultrafine heavy calcium carbonate powder but also achieves full utilization of materials and reduces production costs. Simultaneously, the device's power structure is rationally designed, with high energy utilization efficiency, reducing energy waste, improving the stability and reliability of the device, and extending its service life. This provides excellent equipment support for the production of ultrafine heavy calcium carbonate and can meet the needs of large-scale production.

[0018] 2. This application, through the setting of components such as the limiting connecting frame, drive rod, transmission sleeve and transmission column, enables the drive rod to rotate in the opposite direction, thereby providing stable and reliable support for the grinding work of the upper and lower grinding discs, improving the overall stability and reliability of the device, reducing the probability of failure, lowering maintenance costs, extending the service life of the device, and providing a strong guarantee for the production of ultrafine heavy calcium carbonate.

[0019] 3. This application utilizes components such as a transmission shaft, transmission frame, eccentric wheel, and sieve plate. The rotation of the transmission shaft drives the sieve plate to reciprocate within the crushing chamber via a vibration mechanism. This vibration process allows the sieve plate to effectively screen the materials entering the crushing chamber. Materials meeting certain particle size requirements pass through the sieve plate into the grinding chamber, facilitating subsequent grinding. Larger particles that do not meet the requirements are automatically transported to a bucket elevator for secondary crushing via a return pipe under the vibration of the sieve plate. This real-time separation of qualified and substandard particles avoids energy waste and equipment wear caused by over-crushing. Substandard particles are re-crushed through the return system, effectively improving the utilization rate of raw materials. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the internal structure of the crushing chamber of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the crushing chamber of the present invention;

[0023] Figure 4 This is a schematic diagram of the sieve plate of the present invention;

[0024] Figure 5 This is a schematic diagram of the vibration mechanism of the present invention;

[0025] Figure 6 This is a partial structural cross-sectional view of the present invention;

[0026] Figure 7 This is a cross-sectional view of the internal structure of the grinding box of the present invention;

[0027] Figure 8 This is a cross-sectional view of the internal structure of the drive box of the present invention;

[0028] Figure 9 This is a schematic diagram of the grinding part of the present invention;

[0029] Figure 10 This is an exploded view of the grinding disc structure of the present invention;

[0030] Figure 11 This is a schematic diagram of the drive mechanism of the present invention;

[0031] Figure 12 This is an exploded view of the drive mechanism of the present invention.

[0032] [Explanation of Key Component Symbols]

[0033] 1. Crushing box; 2. Grinding box; 3. Drive box; 4. Sieve plate; 5. Transmission shaft;

[0034] 6. Vibration mechanism; 601. Transmission frame; 602. Eccentric wheel; 603. Support plate; 604. Limit block;

[0035] 7. Upper grinding disc; 8. Lower grinding disc;

[0036] 9. Drive mechanism; 901. Limiting connection frame; 902. Drive rotating rod; 903. Drive bevel gear; 904. Driven bevel gear one; 905. Driven bevel gear two; 906. Transmission sleeve; 907. Transmission column; 908. Fixed connecting rod; 909. Support rod;

[0037] 10. Cleaning plate; 11. Recycling pipe; 12. Exhaust fan; 13. Collection box; 14. Ventilation duct; 15. Support base; 16. Drive motor; 17. Crushing roller; 18. Transmission gear; 19. Crushing motor; 20. Controller; 21. Bucket elevator; 22. Return pipe. Detailed Implementation

[0038] This invention provides a grinding mill for producing ultrafine heavy calcium carbonate.

[0039] Example 1;

[0040] Please see Figure 1 and Figure 2 The device includes a crushing box 1, on the outer surface of which a controller 20 is fixedly installed. The controller 20 is used to control the operation of various electrical devices in the device. The controller 20 can be installed in a suitable location according to actual needs. The structural components shown in the accompanying drawings are all illustrative examples. Their specific real-time operation should be adapted and optimized based on the functional requirements, assembly conditions and process limitations in the actual application scenario, and the structural parameters, size specifications and connection methods should be adjusted accordingly. All electrical devices involved in this application are existing technologies well known to those skilled in the art, and will not be described in detail in this application.

[0041] Please see Figure 1 and Figure 7 The crushing box 1 is equipped with a bucket elevator 21 on its exterior. The recovery pipe 11 is fixedly connected to the bucket elevator 21. The outer surface of the crushing box 1 is fixedly connected to the return pipe 22. The bucket elevator 21 is used to transport the pre-treated ore raw materials to the crushing box 1 for processing. The return pipe 22 is located outside the screening plate 4 and can transport the large particles screened out on the screening plate 4 back to the bucket elevator 21 to re-crush the large particles, so as to avoid the large particles entering the grinding box 2 and increasing the wear of the internal equipment of the grinding box 2, thus extending the service life of the device. The recovery pipe 11 can transport the fine particles that do not meet the requirements of ultrafine heavy calcium carbonate powder back to the bucket elevator 21, thereby realizing multi-stage screening and automatic recovery of materials, improving the processing accuracy of ultrafine heavy calcium carbonate powder. The output end of the bucket elevator 21 has a good sealing effect with the crushing box 1, which can effectively prevent dust from entering the inside of the device and affecting the production quality of the powder.

[0042] Please see Figure 1 , Figure 6 and Figure 7The grinding chamber 1 is fixedly connected to the bottom of the grinding chamber 2. Two exhaust fans 12 are fixedly installed on the outer surface of the grinding chamber 2. A collection box 13 is movably installed at the output end of each exhaust fan 12. A ventilation duct 14 is opened on the top surface of the grinding chamber 2. The exhaust fans 12 can generate a certain airflow inside the grinding chamber 2, thereby drawing calcium carbonate powder from the grinding chamber 2 and conveying it to the collection box 13. The collection box 13 can collect the qualified ultrafine heavy calcium carbonate powder. The collection box 13 includes a fixed frame and a barrier bag covering the outer surface of the frame. The material of the bag is selected according to the diameter of the powder being processed, ensuring that while ventilating, it can also intercept the powder, avoiding powder scattering and material waste. The ventilation duct 14 provides a ventilation environment for the operation of the exhaust fans 12. The ventilation duct 14 can also block dust in the air, preventing dust from entering the grinding chamber 2 and affecting the production precision of calcium carbonate powder.

[0043] The bottom of the grinding box 2 is fixedly connected to the drive box 3, and the bottom of the drive box 3 is fixedly connected to the support base 15. The drive box 3 provides support and protection for the installation and use of the drive mechanism 9. The drive box 3 and the grinding box 2 have good sealing performance, which can prevent the powder generated in the grinding box 2 from entering the drive box 3 and affecting the normal use of the drive mechanism 9. It can also prevent the waste of leveling. The support base 15 plays a role in stabilizing the entire device and ensuring that the entire device will not shake or tip over during operation.

[0044] A drive motor 16 is fixedly mounted on the outer surface of the drive housing 3. The drive rod 902 is fixedly connected to the output shaft of the drive motor 16. The drive motor 16 serves as a power source, providing power for the rotation of the drive rod 902. When the drive motor 16 starts, its output shaft drives the drive rod 902 to rotate, and the drive bevel gear 903 at the end of the drive rod 902 rotates accordingly. This, in turn, drives the driven bevel gear 1 904 and driven bevel gear 2 905 to rotate through meshing, providing power for the transmission operation of the subsequent drive mechanism 9.

[0045] Please see Figure 1 , Figure 2 and Figure 3 The crushing box 1 has two crushing rollers 17 rotatably installed inside. The crushing box 1 is equipped with a protective cover, which is used to cover the two crushing rollers 17 without obstructing their use. This ensures that all the material entering the crushing box 1 via the bucket elevator 21 can enter the crushing rollers 17 and be crushed, thus preventing the material from splashing out of the crushing range of the crushing rollers 17 and causing waste of raw materials.

[0046] Each crushing roller 17 is fixedly connected to a transmission gear 18 at its end. The two transmission gears 18 mesh with each other. A crushing motor 19 is fixedly installed on the outside of the crushing box 1. The output shaft of the crushing motor 19 is fixedly connected to the crushing roller 17. When the crushing motor 19 starts, its output shaft drives the crushing roller 17 to rotate. Since the transmission gears 18 at the ends of the two crushing rollers 17 mesh with each other, the two crushing rollers 17 can rotate synchronously in opposite directions. This allows the two crushing rollers 17 to crush the material conveyed by the bucket elevator 21, crushing the stone to a feed particle size of about 1 cm, which meets the feeding requirements of the grinding mill and facilitates the subsequent grinding work of the upper grinding disc 7 and the lower grinding disc 8.

[0047] The transmission shaft 5 is connected to the output shaft of the crushing motor 19 via a belt and pulleys. Both the end of the transmission shaft 5 and the output shaft of the crushing motor 19 are fixedly mounted with pulleys, which are connected by a belt drive. When the crushing motor 19 starts and drives the two upper grinding discs 7 to crush the stone, the power of the crushing motor 19 can also be transmitted to the transmission shaft 5 through the belt and pulleys, thereby driving the transmission shaft 5 to rotate. The rotation of the transmission shaft 5 can provide power for the operation of the subsequent vibration mechanism 6, which reasonably simplifies the power structure of the device and improves the energy utilization efficiency of the device.

[0048] Example 2;

[0049] Please see Figure 2 , Figure 3 and Figure 4 The crushing box 1 is internally connected to a slidable screen plate 4, and internally connected to a rotatable drive shaft 5. Both ends of the drive shaft 5 are equipped with vibration mechanisms 6. The screen plate 4 has a screen of a certain diameter and is installed at a certain angle. When the drive shaft 5 rotates, it can drive the screen plate 4 to vibrate back and forth inside the crushing box 1 through the vibration mechanism 6. This vibration process enables the screen plate 4 to effectively screen the material entering the crushing box 1, leaving large particles on the screen plate 4 and sliding them into the return pipe 22 under the tilt and vibration of the screen plate 4. Finally, the material is transported again to the bucket elevator 21 for secondary crushing through the return pipe 22. The material that meets certain particle size requirements will enter the grinding box 2 through the screen plate 4 for the next grinding process.

[0050] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5The vibration mechanism 6 includes a transmission frame 601 and an eccentric wheel 602. The transmission frame 601 and the eccentric wheel 602 are adapted to each other. The eccentric wheel 602 is fixedly installed on the surface of the transmission shaft 5. There is a certain deviation between the eccentric wheel 602 and the center of the transmission shaft 5. When the transmission shaft 5 rotates, due to the deviation between the eccentric wheel 602 and the center of the transmission shaft 5, the eccentric wheel 602 will make eccentric circular motion, which will drive the transmission frame 601 adapted to it to make reciprocating motion. Two support plates 603 are fixedly connected to the outer surface of the transmission frame 601, and the sieve plate 4 is fixedly connected to the corresponding support plate 603. Therefore, the reciprocating motion of the transmission frame 601 will drive the sieve plate 4 to reciprocate and vibrate inside the crushing box 1, providing power for the sieve plate 4 to perform the sieving function.

[0051] Two support plates 603 are fixedly connected to the outer surface of the transmission frame 601. The sieve plate 4 is fixedly connected to the corresponding support plate 603. Two limiting blocks 604 are fixedly connected to the inner wall of the crushing box 1. The two support plates 603 are slidably connected to the two limiting blocks 604 respectively. This sliding connection method ensures the stable sliding of the sieve plate 4 in the crushing box 1 and prevents it from shifting or shaking during the vibration sieve process. The limiting blocks 604 play a guiding and supporting role for the support plates 603, making the reciprocating vibration of the sieve plate 4 smoother and more accurate, further improving the sieve effect and stability, and improving the transmission stability of the vibration mechanism 6.

[0052] Example 3;

[0053] Please see Figure 6 , Figure 7 , Figure 9 and Figure 10 The grinding box 2 is equipped with an upper grinding disc 7 and a lower grinding disc 8 that are rotatably mounted inside. The drive box 3 is equipped with a drive mechanism 9 for driving the upper grinding disc 7 and the lower grinding disc 8. When the material passing through the sieve plate 4 enters the drive box 3, it will enter the top surface of the lower grinding disc 8 through the hole in the middle of the upper grinding disc 7. As the lower grinding disc 8 continues to rotate, it will be slowly moved to the edge of the lower grinding disc 8 by centrifugal force. Two rings of grinding rollers are installed on the bottom surface of the upper grinding disc 7 and the top surface of the lower grinding disc 8. The grinding rollers are made of ZGMn13 material, which has the advantages of high toughness and low cost. The surface of the grinding rollers has a certain roughness. When the upper grinding disc 7 and the lower grinding disc 8 rotate relative to each other, the grinding rollers can fully grind the material that has entered the grinding box 2 after being sieved by the sieve plate 4, so that the material meets the particle size requirements of ultrafine heavy calcium carbonate powder. The ground calcium carbonate powder will be thrown out from the lower grinding disc 8 and drawn into the collection box 13 by the exhaust fan 12 for collection.

[0054] A cleaning plate 10 is fixedly connected to the outer surface of the transmission sleeve 906. The cleaning plate 10 is rotatably connected to the inner bottom wall of the grinding box 2. A recovery pipe 11 is fixedly connected to the outer surface of the grinding box 2. The setting of the cleaning plate 10 ensures the stability of the rotation of the transmission sleeve 906, making the drive mechanism 9 more stable and reliable when driving the upper grinding disc 7 and the lower grinding disc 8 to rotate. At the same time, it can also clean up the fine particles that do not meet the requirements of ultrafine heavy calcium carbonate powder that fall on the inner bottom wall of the grinding box 2, and transport them to the recovery pipe 11 by centrifugal force. The recovery pipe 11 is used to transport the fine particles that do not meet the requirements of ultrafine heavy calcium carbonate powder back to the bucket elevator 21 to realize the recycling of materials and further improve the device's multi-stage screening and automatic recovery capabilities.

[0055] Please see Figure 6 , Figure 8 , Figure 9 , Figure 11 and Figure 12 The drive mechanism 9 includes a limiting connecting frame 901 fixedly installed inside the drive box 3. A drive rod 902 is rotatably connected inside the limiting connecting frame 901. A drive bevel gear 903 is fixedly connected to the end of the drive rod 902. A driven bevel gear 904 and a driven bevel gear 905 are respectively meshed on the outside of the drive bevel gear 903. When the drive motor 16 starts and drives the drive rod 902 to rotate, the drive bevel gear 903 at the end of the drive rod 902 rotates accordingly. Since the drive bevel gear 903 is respectively meshed with the driven bevel gear 904 and the driven bevel gear 905, the driven bevel gear 904 and the driven bevel gear 905 will rotate synchronously in opposite directions under the drive of the drive bevel gear 903, thereby providing power for the subsequent reverse rotation of the upper grinding disc 7 and the lower grinding disc 8.

[0056] A transmission sleeve 906 is fixedly connected to the top surface of the driven bevel gear 904, and a transmission column 907 is fixedly connected inside the driven bevel gear 905. The transmission column 907 rotates inside the transmission sleeve 906. The transmission sleeve 906 and the transmission column 907 are rotatably connected to both ends of the limiting connecting frame 901, respectively. The transmission column 907 is rotatably connected to the inner bottom wall of the drive box 3. This connection method allows the driven bevel gear 904 and the driven bevel gear 905 to maintain a relatively stable state when rotating, reducing vibration and noise. At the same time, the rotatable connection between the transmission sleeve 906 and the transmission column 907 and the limiting connecting frame 901 ensures the smooth operation of the entire transmission system.

[0057] A set of fixed connecting rods 908 are fixedly connected to the top of the transmission column 907. The end of each fixed connecting rod 908 is fixedly connected to the upper grinding disc 7. The transmission sleeve 906 passes through the grinding box 2 and is rotatably connected to the grinding box 2. The top of the transmission sleeve 906 is fixedly connected to the lower grinding disc 8. When the driven bevel gear 1 904 and the driven bevel gear 2 905 rotate, the transmission sleeve 906 and the transmission column 907 will also rotate accordingly, thereby driving the upper grinding disc 7 and the lower grinding disc 8 connected to them to rotate. Since the driven bevel gear 1 904 and the driven bevel gear 2 905 rotate synchronously in opposite directions, the upper grinding disc 7 and the lower grinding disc 8 will also rotate in opposite directions. This reverse rotation method can grind the material more effectively. During the grinding process, the material is squeezed and rubbed between the upper grinding disc 7 and the lower grinding disc 8, thereby being crushed into finer particles. Moreover, the rotation of the transmission sleeve 906 and the transmission column 907 can also make the material more evenly distributed in the grinding box 2, improving the grinding efficiency and quality. In addition, the design of this transmission structure makes the cooperation between various components closer, improves the overall stability and reliability of the device, reduces the probability of failure, lowers maintenance costs, and extends the service life of the device, providing a strong guarantee for the production of ultrafine heavy calcium carbonate.

[0058] Please see Figure 8 , Figure 9 , Figure 11 and Figure 12 Two support rods 909 are fixedly connected to the outer surface of the limiting connection frame 901. Each support rod 909 is fixedly connected to the inner wall of the drive box 3. The setting of the support rods 909 enhances the stability of the limiting connection frame 901 inside the drive box 3, making the drive mechanism 9 run more smoothly and further ensuring the stability and reliability of the rotation of the upper grinding plate 7 and the lower grinding plate 8.

[0059] Working principle: In use, the controller 20 first starts the electrical equipment in the device. The bucket elevator 21 transports the pre-treated ore raw material to the crushing box 1. The crushing motor 19 starts, and its output shaft drives the crushing roller 17 to rotate. Since the transmission gears 18 at the ends of the two crushing rollers 17 mesh, the two crushing rollers 17 rotate synchronously in opposite directions to crush the material transported by the bucket elevator 21. At the same time, the crushing motor 19 can also drive the transmission shaft 5 to rotate through the belt and pulley. The rotation of the transmission shaft 5 can drive the screening plate 4 to vibrate back and forth inside the crushing box 1 through the vibration mechanism 6, so that the screening plate 4 can screen the material entering the crushing box 1. Large particles are transported to the return pipe 22 by tilting and vibration, and then transported back to the bucket elevator 21 for secondary crushing through the return pipe 22. The material that meets the particle size requirements enters the grinding box 2 through the screening plate 4. Material entering the grinding chamber 2 passes through the central hole of the upper grinding disc 7 to the top surface of the lower grinding disc 8. At this time, the drive motor 16 starts, driving the drive rod 902 to rotate. The drive rod 902 can drive the driven bevel gear 1 904 and driven bevel gear 2 905 to rotate synchronously in opposite directions through the drive bevel gear 903, thereby driving the transmission sleeve 906 and transmission column 907 to rotate, so that the upper grinding disc 7 and the lower grinding disc 8 rotate in opposite directions. The opposite rotation of the upper grinding disc 7 and the lower grinding disc 8 can fully grind the material through the grinding rollers, so that the material meets the particle size requirements of ultrafine heavy calcium carbonate powder. The ground calcium carbonate powder is thrown out from the lower grinding disc 8. The exhaust fan 12 generates a certain airflow inside the grinding chamber 2, which draws the calcium carbonate powder out of the grinding chamber 2 and transports it to the collection box 13 for collection. Fine particles that do not meet the requirements for ultrafine heavy calcium carbonate powder and fall onto the bottom wall of the grinding chamber 2 will be transported to the recovery pipe 11 by the cleaning plate 10 through centrifugal force. The recovery pipe 11 will then transport these fine particles to the bucket elevator 21 again to achieve material recycling.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A grinding mill for producing ultrafine heavy calcium carbonate, comprising a grinding chamber (1), characterized in that: The grinding box (1) is fixedly connected to the bottom of the grinding box (2), and the bottom of the grinding box (2) is fixedly connected to the drive box (3). The grinding box (1) is slidably connected to the inside of the grinding box (1), and the grinding box (1) is rotatably connected to the inside of the grinding box (1). Both ends of the drive shaft (5) are provided with vibration mechanisms (6). The grinding box (2) is rotatably installed with an upper grinding disc (7) and a lower grinding disc (8). The drive box (3) is provided with a drive mechanism (9) for driving the upper grinding disc (7) and the lower grinding disc (8). The vibration mechanism (6) includes a transmission frame (601) and an eccentric wheel (602), the transmission frame (601) and the eccentric wheel (602) are adapted to each other, and the eccentric wheel (602) is fixedly installed on the surface of the transmission shaft (5); The drive mechanism (9) includes a limiting connecting frame (901) fixedly installed inside the drive box (3). The limiting connecting frame (901) is rotatably connected to a drive rod (902). The end of the drive rod (902) is fixedly connected to a drive bevel gear (903). The drive bevel gear (903) is meshed with a driven bevel gear one (904) and a driven bevel gear two (905) on the outside.

2. The grinding mill for producing ultrafine heavy calcium carbonate according to claim 1, characterized in that: A transmission sleeve (906) is fixedly connected to the top surface of the driven bevel gear one (904), and a transmission column (907) is fixedly connected inside the driven bevel gear two (905). The transmission column (907) rotates inside the transmission sleeve (906), and the transmission sleeve (906) and the transmission column (907) are rotatably connected to both ends of the limiting connection frame (901).

3. The grinding mill for producing ultrafine heavy calcium carbonate according to claim 2, characterized in that: The top end of the transmission column (907) is fixedly connected to a set of fixed connecting rods (908), and the end of each fixed connecting rod (908) is fixedly connected to the upper grinding disc (7).

4. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 1, characterized in that: The outer surface of the limiting connecting frame (901) is fixedly connected to two support rods (909), and each support rod (909) is fixedly connected to the inner wall of the drive box (3).

5. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 1, characterized in that: Two support plates (603) are fixedly connected to the outer surface of the transmission frame (601). The sieve plate (4) is fixedly connected to the corresponding support plate (603). Two limiting blocks (604) are fixedly connected to the inner wall of the crushing box (1). The two support plates (603) are slidably connected to the two limiting blocks (604) respectively.

6. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 2, characterized in that: A cleaning plate (10) is fixedly connected to the outer surface of the transmission sleeve (906). The cleaning plate (10) is rotatably connected to the inner bottom wall of the grinding box (2). A recovery pipe (11) is fixedly connected to the outer surface of the grinding box (2).

7. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 1, characterized in that: Two exhaust fans (12) are fixedly installed on the outer surface of the grinding box (2). A collection box (13) is movably installed at the output end of each exhaust fan (12). A ventilation channel (14) is opened on the top surface of the grinding box (2).

8. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 1, characterized in that: The bottom of the drive box (3) is fixedly connected to a support base (15), and a drive motor (16) is fixedly installed on the outer surface of the drive box (3). The drive rod (902) is fixedly connected to the output shaft of the drive motor (16).

9. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 1, characterized in that: The crushing box (1) has two crushing rollers (17) rotatably mounted inside. Each crushing roller (17) is fixedly connected to a transmission gear (18) at its end. The two transmission gears (18) mesh with each other. The crushing box (1) has a crushing motor (19) fixedly mounted outside. The output shaft of the crushing motor (19) is fixedly connected to the crushing roller (17). The transmission shaft (5) and the output shaft of the crushing motor (19) are connected by a belt and a pulley.

10. A grinding mill for producing ultrafine heavy calcium carbonate according to claim 6, characterized in that: A controller (20) is fixedly installed on the outer surface of the crushing box (1), a bucket elevator (21) is provided outside the crushing box (1), the recovery pipe (11) is fixedly connected to the bucket elevator (21), and a return pipe (22) is fixedly connected to the outer surface of the crushing box (1).

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