Segmented grinding and separate sorting grinding system

Abstract

This invention discloses a segmented grinding and separate sorting grinding system, comprising: a roller press grinding unit, a ball mill grinding unit, and a finished product discharge unit. The roller press grinding unit uses a roller press to circulate and grind the material, sorting materials that meet the particle size requirements and sending them to the finished product discharge unit, while materials that do not meet the particle size requirements are sorted and sent to the ball mill grinding unit. The ball mill grinding unit uses a ball mill to circulate and grind the material, sorting materials that meet the particle size requirements and sending them to the finished product discharge unit. Five feeding points are provided, located at the roller press inlet, roller press outlet, ball mill inlet, ball mill outlet, and mixer. This invention has the advantages of segmented grinding, separate sorting, and controllability and adjustability. It can select different grinding stages according to different material compositions, select powders according to different grinding fineness requirements, and precisely control the material composition and particle size. The five-point feeding process is flexible and highly adaptable.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and more specifically, to a grinding system for segmented grinding and separate sorting. Background Technology

[0002] Cement grinding involves grinding clinker with admixtures such as gypsum and slag to obtain cement products that meet performance requirements. Current cement grinding systems mainly include ball mill final grinding systems and roller press final grinding systems. Ball mill final grinding systems produce cement of the highest quality, with a wide particle size distribution, high particle sphericity, low water demand, moderate hydration rate, and excellent strength development. However, they have a high fine particle content and extremely low energy utilization, only about 3%, leading to significant energy consumption. Roller press final grinding systems produce cement with a wide particle size range, but the polarization is severe, with both fine and coarse particles concentrated in one area. The particle morphology is irregular, with flakes and strips, and poor sphericity. They also have a higher water demand, faster setting speed, slower hydration rate, and less ideal strength development. However, they have higher energy utilization and significant energy-saving effects.

[0003] In the prior art, such as Chinese Patent Application No. 202111209972.8, a high-performance grinding process system combining an external circulation vertical mill and a cement mill is disclosed. This system includes an external circulation vertical mill, a combined air classifier, a cyclone dust collector, a first conveying chute, a dry-mixed mill, a second conveying chute, a fine powder blending bin, a coarse powder blending bin, and a mixer. The external circulation vertical mill and the combined air classifier are connected end-to-end. The discharge port of the combined air classifier is connected to the cyclone dust collector, and the discharge port of the cyclone dust collector is connected to the first conveying chute. The outlet of the first conveying chute splits into two paths: one connected to the dry-mixed mill, and the other connected to the coarse powder blending bin. The discharge port of the dry-mixed mill is connected to the second conveying chute, and the outlet of the second conveying chute is connected to the fine powder blending bin. The outlets of both the fine powder blending bin and the coarse powder blending bin are connected to the mixer. This scheme combines the coarse grinding process of the external circulation vertical mill and the fine grinding process of the mixed mill, allowing them to leverage their respective advantages in terms of process and energy consumption.

[0004] However, this solution only sets feeding points at the combined classifier and the external circulation vertical mill, and cannot select different grinding sections according to different material components, thus making it impossible to control the particle size of different material components.

[0005] Therefore, it is necessary to propose a segmented grinding and separate sorting grinding system to at least partially solve the problems existing in the prior art. Summary of the Invention

[0006] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a grinding system for segmented grinding and separate sorting, comprising:

[0008] The unit consists of a roller press grinding unit, a ball mill grinding unit, and a finished product discharge unit. The roller press grinding unit uses a roller press to circulate and grind the material. The material that meets the particle size requirements is sorted and sent to the finished product discharge unit, while the material that does not meet the particle size requirements is sorted and sent to the ball mill grinding unit. The ball mill grinding unit uses a ball mill to circulate and grind the material. The material that meets the particle size requirements is sorted and sent to the finished product discharge unit. A mixer is installed at the end of the finished product discharge unit.

[0009] There are five feeding points, A1-A5, located at the inlet end of the roller press, the outlet end of the roller press, the inlet end of the ball mill, the outlet end of the ball mill, and the mixer, respectively.

[0010] Preferably, the roller press grinding unit is equipped with a first classifier, which is a three-separation classifier that separates the material according to a preset particle size standard to form large particles, medium and coarse powder and fine powder.

[0011] Preferably, a first grinding circuit is formed within the roller press grinding unit: the outlet end of the roller press is connected to the inlet end of the first classifier, the fine powder outlet end of the first classifier is connected to the finished product discharge unit, the medium and coarse powder outlet end of the first classifier is connected to the inlet end of the ball mill, and the large particle outlet end of the first classifier is connected to the inlet end of the roller press.

[0012] Preferably, the ball mill grinding unit is equipped with a second classifier, which is a dual-separation classifier that separates the material according to a preset particle size standard to form coarse powder and fine powder.

[0013] Preferably, a second grinding loop is formed within the ball mill grinding unit: the outlet end of the ball mill is connected to the inlet end of the second classifier, the fine powder outlet end of the second classifier is connected to the finished product discharge unit, and the coarse powder outlet end of the second classifier is connected to the inlet end of the ball mill.

[0014] Preferably, the segmented grinding and separate sorting grinding system further includes a dust removal unit, which is connected to the first and second air classifiers.

[0015] Preferably, the mixer includes:

[0016] The machine body has a mixing tank connected to its center. The mixing tank is used to hold finished materials. The top of the machine body is connected to an inlet pipe that extends into the mixing tank. The bottom of the mixing tank is connected to an outlet pipe that is slidably connected to the bottom of the machine body.

[0017] A partition is connected to the inner wall of the machine body and is arranged above the mixing tank;

[0018] A turntable, which is rotatably connected to the center of the partition and has a bevel gear ring connected to its edge;

[0019] The bevel gear meshes with the bevel gear ring on the turntable.

[0020] Rotating shaft one is horizontally rotatably connected to the side wall of the machine body. One end of rotating shaft one is connected to the center of the bevel gear, and the other end is connected to the output end of the motor installed on the side wall of the machine body.

[0021] The stirring rod is vertically connected to the center of the turntable and extends into the mixing tank.

[0022] Preferably, the mixer further includes a vibration unit, which includes:

[0023] Rotary shaft two is rotatably connected to the side wall of the machine body. A cam is connected to rotary shaft two. Rotary shaft one and rotary shaft two are connected by a pulley assembly.

[0024] Cylinder 1 is vertically connected to the inner wall of the machine body. The top of the piston rod of cylinder 1 abuts against the cam. A spring connects the piston of cylinder 1 to the inner wall of cylinder 1.

[0025] Cylinder 2, multiple cylinders 2 are connected to the bottom of the inner wall of the machine body and are evenly arranged on the outside of the mixing box. The top of the piston rod of cylinder 2 is connected to the side wall of the mixing box. A spring is connected between the piston of cylinder 2 and the inner wall of cylinder 2. The lower part of cylinder 2 is connected to the lower part of cylinder 2 through a pipeline.

[0026] Preferably, an air pump is connected to the top of the turntable, and the air outlet of the air pump is connected to the stirring rod cavity. The stirring rod includes:

[0027] An air intake plate is connected to the inner wall of the stirring rod and has multiple vertical through holes.

[0028] The guide impeller is rotatably connected to the bottom end of the air intake plate;

[0029] The first and second air guide plates are arranged vertically and slidably connected to the inner wall of the stirring rod cavity. Both the first and second air guide plates are provided with air guide grooves. The first air guide plate is connected to the bottom end of the guide impeller, and the bottom end of the second air guide plate is connected to the inner wall of the stirring rod with a spring.

[0030] The vertical rod is vertically connected to the bottom of the air guide plate, and multiple conical blocks are connected at intervals on the vertical rod. The sides of the conical blocks are set as inclined surfaces.

[0031] Preferably, the stirring rod further includes:

[0032] Telescopic rods, multiple telescopic rods are slidably connected to the side wall of the stirring rod, and the inner end of the telescopic rods abuts against the conical surface of the conical block, and a limit block is connected to the telescopic rods;

[0033] The limiting cavity is located on the side wall of the stirring rod, and the limiting block is slidably connected inside the limiting cavity. A spring is connected to one end of the limiting block and the limiting cavity.

[0034] The three-way pipe has an air inlet end connected to the stirring rod cavity, a first air outlet end connected to the limiting cavity, and a second air outlet end extending out of the stirring rod toward the outer end of the telescopic rod, with a dustproof net connected to the second air outlet end.

[0035] Compared with the prior art, the present invention has at least the following beneficial effects:

[0036] It features segmented grinding, separate sorting, and controllable adjustment, allowing for the selection of different grinding stages based on different material compositions and the separate selection of powder according to different grinding fineness requirements. The material composition and particle size are precisely controllable, and the five-point feeding process offers flexibility and strong adaptability.

[0037] (1) Segmented grinding: The roller press grinding unit and the ball mill grinding unit are set as two independent systems. The five-point feeding process is flexible. Different grinding segments can be selected according to different material components. It has strong adaptability and gives full play to the working efficiency of each grinding segment.

[0038] (2) Separate sorting: Different particle sizes are sorted according to the characteristic requirements of different components;

[0039] (3) Controllable and adjustable: Select the percentage of each material component according to the requirements of cement preparation, and the particle size requirements of different material components to achieve precise controllability and adjustability.

[0040] The segmented grinding and separate sorting grinding system of the present invention, other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of the present invention. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0042] Figure 1 This is a flow chart of the segmented grinding and separate sorting grinding system of the present invention;

[0043] Figure 2 This is a process flow diagram of the roller press grinding unit in the segmented grinding and separate sorting grinding system of the present invention;

[0044] Figure 3 This is a process flow diagram of the ball mill grinding unit in the segmented grinding and separate sorting grinding system of the present invention;

[0045] Figure 4 This is a schematic diagram of the mixer in the segmented grinding and separate sorting grinding system of the present invention;

[0046] Figure 5 This is a schematic diagram of the mixer in the segmented grinding and separate sorting grinding system of the present invention;

[0047] Figure 6 This is a schematic cross-sectional view of the stirring rod in the segmented grinding and separate sorting system of the present invention.

[0048] Figure 7 The present invention provides a segmented grinding and separate sorting grinding system. Figure 6 A magnified view of the structure at point A in the middle;

[0049] Figure 8 The present invention provides a segmented grinding and separate sorting grinding system. Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0050] Figure 9 This is a schematic diagram of the guide impeller in the segmented grinding and separate sorting system of the present invention.

[0051] Figure 10 This is a schematic diagram of the air guide plate in the segmented grinding and sorting system of the present invention.

[0052] In the diagram: 1. Roller press grinding unit; 2. Ball mill grinding unit; 3. Finished product discharge unit; 4. Roller press; 5. Ball mill; 7. First classifier; 8. Second classifier; 9. Dust removal unit; 11. Machine body; 12. Mixing box; 13. Baffle plate; 14. Turntable; 15. Bevel gear; 16. Shaft one; 17. Motor; 18. Stirring rod; 19. Feed pipe; 20. Discharge pipe; 21. Shaft two; 22. Convex... 23. Pulley assembly; 24. Cylinder 1; 25. Piston rod 1; 26. Piston 1; 27. Cylinder 2; 28. Piston rod 2; 29. ​​Piston 2; 30. Pipeline; 31. Air pump; 32. Air inlet plate; 33. Guide impeller; 34. Air guide plate 1; 35. Air guide plate 2; 36. Air guide groove; 37. Vertical rod; 38. Conical block; 39. Telescopic rod; 40. Limiting block; 41. Limiting cavity; 42. T-shaped pipeline. Detailed Implementation

[0053] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0054] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0055] Example 1:

[0056] like Figure 1-3 As shown, the present invention provides a grinding system for segmented grinding and separate sorting, comprising:

[0057] The unit consists of a roller press grinding unit 1, a ball mill grinding unit 2, and a finished product discharge unit 3. The roller press grinding unit 1 uses a roller press 4 to circulate and grind the material. The material that meets the particle size requirements is sorted and sent to the finished product discharge unit 3, while the material that does not meet the particle size requirements is sorted and sent to the ball mill grinding unit 2. The ball mill grinding unit 2 uses a ball mill 5 to circulate and grind the material. The material that meets the particle size requirements is sorted and sent to the finished product discharge unit 3. A mixer is installed at the end of the finished product discharge unit 3.

[0058] There are five feeding points, A1-A5, located at the inlet end of roller press 4, the outlet end of roller press 4, the inlet end of ball mill 5, the outlet end of ball mill 5, and the mixer, respectively.

[0059] The working principle and beneficial effects of the above technical solution are as follows:

[0060] The segmented grinding and separate sorting grinding system selects the percentage of each material component according to the requirements of cement preparation. The material is added to the grinding system, and the roller press grinding unit 1 and the ball mill grinding unit 2 are set as two independent systems. After the material is circulated and ground and sorted by the roller press grinding unit 1, materials that meet the particle size requirements and materials that do not meet the particle size requirements are obtained. The materials that do not meet the particle size requirements are sent to the ball mill grinding unit 2 for further grinding, and the materials that meet the particle size requirements are sent to the finished product discharge unit 3 and transported to the finished product silo.

[0061] During the grinding process, materials are added at five feeding points according to the particle size requirements of different material components. These five feeding points are respectively set at the inlet end of roller press 4, the outlet end of roller press 4, the inlet end of ball mill 5, the outlet end of ball mill 5, and the mixer. This allows different materials to be added at different nodes of the process and enter different grinding sections, so that the particle size obtained by grinding can meet the requirements of each component and give full play to the work efficiency of each grinding section.

[0062] The segmented grinding and separate sorting grinding system provided by this invention has the advantages of segmented grinding, separate sorting, and controllability and adjustability. It can select different grinding stages according to different material components, and select powders according to different grinding fineness requirements. The material composition and particle size are precisely controllable. The five-point feeding process is flexible and highly adaptable.

[0063] (1) Segmented grinding: The roller press grinding unit 1 and the ball mill grinding unit 2 are set as two independent systems. The five-point feeding process is flexible. Different grinding segments are selected according to different material components, which is highly adaptable and makes full use of the working efficiency of each grinding segment.

[0064] (2) Separate sorting: Different particle sizes are sorted according to the characteristic requirements of different components;

[0065] (3) Controllable and adjustable: Select the percentage of each material component according to the requirements of cement preparation, and the particle size requirements of different material components to achieve precise controllability and adjustability.

[0066] Example 2:

[0067] like Figure 1-3 As shown, based on the above embodiment 1, the roller press grinding unit 1 is equipped with a first classifier 7, which is a three-separation classifier that separates the material according to the preset particle size standard to form large particles, medium and coarse powder and fine powder.

[0068] The first grinding circuit is formed in the roller press grinding unit 1: the outlet end of the roller press 4 is connected to the inlet end of the first classifier 7, the fine powder outlet end of the first classifier 7 is connected to the finished product discharge unit 3, the medium and coarse powder outlet end of the first classifier 7 is connected to the inlet end of the ball mill 5, and the large particle outlet end of the first classifier 7 is connected to the inlet end of the roller press 4.

[0069] The ball mill grinding unit 2 is equipped with a second classifier 8, which is a dual separation classifier that separates the material according to a preset particle size standard to form coarse powder and fine powder.

[0070] A second grinding circuit is formed within the ball mill grinding unit 2: the outlet end of the ball mill 5 is connected to the inlet end of the second classifier 8, the fine powder outlet end of the second classifier 8 is connected to the finished product discharge unit 3, and the coarse powder outlet end of the second classifier 8 is connected to the inlet end of the ball mill 5.

[0071] The working principle and beneficial effects of the above technical solution are as follows:

[0072] The roller press grinding unit 1 forms a first grinding loop. First, the material is added to the roller press 4 for grinding. Then, the ground material is sent to the first classifier 7 for sorting. The first classifier 7 is a three-stage classifier that separates the material according to a preset particle size standard. Large particles are returned to the roller press 4 through pipelines for further grinding. Medium and coarse powder enters the ball mill grinding unit 2, and fine powder is sent to the finished product discharge unit 3 and conveyed to the finished product silo. The first grinding loop circulates the material for grinding, repeatedly grinding large particles that do not meet the particle size requirements to obtain a smaller finished product, improving grinding efficiency and obtaining more finished products. A feeding point A1 is set at the inlet end of the roller press 4 to supplement the material entering the roller press 4, and a feeding point A2 is set at the outlet end of the roller press 4 to supplement the material entering the first classifier 7.

[0073] A second grinding loop is formed within the ball mill grinding unit 2. Medium and coarse powder separated by the first classifier 7 is added to the ball mill 5 for grinding. The ground material is then fed into the second classifier 8 for further separation. The second classifier 8 is a dual-separation classifier, where coarse powder is returned to the ball mill 5 via pipeline for further grinding, while fine powder is sent to the finished product discharge unit 3 and conveyed to the finished product silo. The second grinding loop circulates and grinds the medium and coarse powder formed in the roller press grinding unit 1, repeatedly grinding coarse powder that does not meet the particle size requirements to obtain a finished product with a smaller particle size. A feeding point A3 is set at the inlet end of the ball mill 5 to supplement the material entering the ball mill 5, and a feeding point A4 is set at the outlet end of the ball mill 5 to supplement the material entering the second classifier 8.

[0074] A feeding point A5 is set at the mixer to add supplementary materials before the finished product is conveyed to the finished product warehouse.

[0075] Through the above structural design, the roller press grinding unit 1 and the ball mill grinding unit 2 are set as two independent systems, and a grinding loop is formed in each unit, which improves the grinding efficiency of materials and obtains more finished materials. After grinding in the roller press grinding unit 1, medium and coarse powder is separated, and the medium and coarse powder is ground and separated again to make the material separation more accurate.

[0076] Example 3:

[0077] like Figure 1-3 As shown, based on the above embodiment 1, the segmented grinding and separate sorting grinding system further includes: a dust removal unit 9, which is connected to the first classifier 7 and the second classifier 8.

[0078] The working principle and beneficial effects of the above technical solution are as follows:

[0079] Ball mill 5, first classifier 7 and second classifier 8 are all equipped with air outlets during use. The air outlets will mix with some materials. The dust removal unit 9 is set as a bag dust collector. The bag dust collector collects the materials escaping from the air outlets of ball mill 5, first classifier 7 and second classifier 8, and sends the fine powder with qualified particle size to the finished product discharge unit 3, effectively reducing external discharge and improving the utilization rate of materials.

[0080] Example 4:

[0081] like Figure 4 , 5 As shown, based on the above embodiment 1, the mixer includes:

[0082] The machine body 11 has a mixing box 12 connected to its center. The mixing box 12 is used to hold finished materials. The top of the machine body 11 is connected to an inlet pipe 19 that extends into the mixing box 12. The bottom of the mixing box 12 is connected to an outlet pipe 20, which is slidably connected to the bottom of the machine body 11.

[0083] Partition 13 is connected to the inner wall of the machine body 11 and arranged above the mixing box 12;

[0084] Turntable 14 is rotatably connected to the center of partition 13 and has a bevel gear ring connected to its edge;

[0085] Bevel gear 15 is meshed with the bevel gear ring above the turntable 14;

[0086] Rotating shaft 16 is horizontally rotatably connected to the side wall of machine body 11. One end of rotating shaft 16 is connected to the center of bevel gear 15, and the other end is connected to the output end of motor 17 installed on the side wall of machine body 11.

[0087] A stirring rod 18 is vertically connected to the center of the turntable 14 and extends into the mixing tank 12.

[0088] The working principle and beneficial effects of the above technical solution are as follows:

[0089] The finished materials formed in different grinding stages need to be mixed evenly before being transported to the finished product warehouse. When the mixer is in use, the finished materials are fed into the mixing box 12 through the feed pipe 19. The motor 17 is started to drive the rotating shaft 16 to rotate. The rotating shaft 16 drives the bevel gear 15 to rotate. The bevel gear 15 meshes with the bevel gear ring of the turntable 14, driving the turntable 14 to rotate on the partition plate 13. The bevel gear transmission plays a speed reduction role. When the turntable 14 rotates, it drives the stirring rod 18 to rotate. The stirring rod 18 stirs the finished materials in the mixing box 12, mixing the finished materials formed in different grinding stages, making the components in the finished product more evenly distributed, and improving the quality of the finished product.

[0090] Example 5:

[0091] like Figure 4 , 5 As shown, based on the above embodiment 4, the mixer further includes a vibration unit, which includes:

[0092] Rotary shaft 21 is rotatably connected to the side wall of machine body 11. A cam 22 is connected to rotary shaft 21. Rotary shaft 16 and rotary shaft 21 are connected by pulley group 23.

[0093] Cylinder 24 is vertically connected to the inner wall of the machine body 11. The top of the piston rod 25 of cylinder 24 abuts against the cam 22. A spring connects the piston 26 of cylinder 24 to the inner wall of cylinder 24.

[0094] Cylinder 27, multiple cylinders 27 are connected to the bottom of the inner wall of the machine body 11 and are evenly arranged on the outside of the mixing box 12. The top of the piston rod 28 of cylinder 27 is connected to the side wall of the mixing box 12. A spring is connected between the piston 29 of cylinder 27 and the inner wall of cylinder 27. The lower part of cylinder 27 is connected to the lower part of cylinder 1 24 through pipe 30.

[0095] The working principle and beneficial effects of the above technical solution are as follows:

[0096] The first shaft 16 drives the second shaft 21 to rotate synchronously through the pulley group 23. The pulley group 23 includes two pulleys located on the first shaft 16 and the second shaft 21 respectively, and a synchronous belt connected to the two pulleys. When the rotating shaft 21 rotates, it drives the cam 22 to rotate. The cam 22 has a protruding end. After the protruding end of the cam 22 contacts the piston rod 25, it squeezes the piston rod 25 to move downward, pushing the piston 26 to slide downward along the inner wall of the cylinder 24, squeezing the gas in the lower part of the cylinder 24. The gas flows through the pipe 30 to the lower part of the cylinder 27 and pushes the piston 29 to slide upward along the inner wall of the cylinder 27, driving the piston rod 28 to move upward. The piston rod 28 drives the mixing box 12 to move upward. When the protruding end of the cam 22 separates from the piston rod 25, all components return to their original positions under the action of the spring. As the rotating shaft 21 rotates, the protruding end of the cam 22 contacts the piston rod 25 intermittently, causing the mixing box 12 to move cyclically in the vertical direction. When the mixing box 12 rises, the stirring rod 18 stirs the finished product at the bottom of the mixing box 12, and when the mixing box 12 falls, it turns the finished product to the upper part of the mixing box 12, increasing the fluidity of the finished product. When the mixing box 12 falls, the spring acts as a buffer and shock absorber. When the mixing box 12 moves, it drives the discharge pipe 20 to slide at the bottom of the machine body 11, and the mixed material is discharged through the discharge pipe 20.

[0097] Through the above structural design, while stirring the finished material, the finished material is effectively turned upside down, so that the stirring rod 18 can contact the finished material at different positions, turn up the material at the bottom, reduce the dead corners of the stirring, and avoid the situation where the density of different components in the finished material is different, causing the high-density material to accumulate at the bottom of the mixing box 12 due to its large mass. This improves the fluidity of the finished material and the stirring and mixing effect is better.

[0098] Example 6:

[0099] like Figure 6-10 As shown, based on the above embodiment 4,

[0100] An air pump 31 is connected to the top of the turntable 14. The air outlet of the air pump 31 is connected to the cavity of the stirring rod 18. The stirring rod 18 includes:

[0101] The air intake plate 32 is connected to the inner wall of the stirring rod 18 and has multiple through holes vertically.

[0102] The guide impeller 33 is rotatably connected to the bottom end of the air intake plate 32;

[0103] The first air guide plate 34 and the second air guide plate 35 are arranged vertically. The first air guide plate 34 and the second air guide plate 35 are slidably connected to the inner wall of the stirring rod 18 cavity. Both the first air guide plate 34 and the second air guide plate 35 are provided with air guide grooves 36. The first air guide plate 34 is connected to the bottom end of the guide impeller 33. The bottom end of the second air guide plate 35 is connected to the inner wall of the stirring rod 18 by a spring.

[0104] The vertical rod 37 is vertically connected to the bottom end of the air guide plate 35, and multiple conical blocks 38 are connected to the vertical rod 37 at intervals. The side of the conical block 38 is set as an inclined surface, and the top diameter of the conical block 38 is larger than the bottom diameter of the conical block 38.

[0105] Telescopic rod 39, multiple telescopic rods 39 are slidably connected to the side wall of stirring rod 18, and the inner end of telescopic rod 39 abuts against the conical surface of conical block 38, and limit block 40 is connected to telescopic rod 39;

[0106] The limiting cavity 41 is opened on the side wall of the stirring rod 18, and the limiting block 40 is slidably connected in the limiting cavity 41. A spring is connected to one end of the limiting block 40 and the limiting cavity 41.

[0107] The three-way pipe 42 has an air inlet end connected to the cavity of the stirring rod 18, a first air outlet end connected to the limiting cavity 41, and a second air outlet end extending out of the stirring rod 18 toward the outer end of the telescopic rod 39, and a dustproof net is connected to the second air outlet end.

[0108] The working principle and beneficial effects of the above technical solution are as follows:

[0109] When the stirring rod 18 is in use, air is pumped into it by the air pump 31. The high-pressure gas enters the guide impeller 33 through the through hole of the air inlet plate 32, driving the guide impeller 33 to rotate. This causes the high-pressure gas to rotate, and the first air guide plate 34 rotates synchronously. Then, the high-pressure gas enters the air guide groove 36 of the first air guide plate 34. When the air guide groove 36 of the first air guide plate 34 and the air guide groove 36 of the second air guide plate 35 are connected over a small area, the high-pressure gas acts on the surface of the second air guide plate 35 and pushes the second air guide plate 35 along the stirring rod. The inner wall of the mixing rod 18 slides downwards, while the spring is compressed to store energy. The second air guide plate 35 drives the vertical rod 37 to move downwards. The side of the conical block 38 contacts the telescopic rod 39, pushing the telescopic rod 39 outwards and extending its extension length. The telescopic rod 39 stirs the finished raw materials at a distance. The outer end of the telescopic rod 39 can also be connected to a pusher plate to push the finished raw materials closer to the center outwards, realizing the movement of the finished raw materials inside and outside the mixing box 12 and improving the fluidity of the finished raw materials. At the same time, high-pressure gas flows into the mixing rod 18 through the connection of the air guide groove 36, and then through the air inlet of the three-way pipe 42. A part of the high-pressure gas flows into the limiting cavity 41 through the first air outlet, pushing the limiting block 40 to move, providing assistance for the extension of the telescopic rod 39, accelerating the extension speed of the telescopic rod 39, and ensuring that the telescopic rod 39 can overcome the resistance of the finished material and extend smoothly. The other part of the high-pressure gas flows into the finished material through the second air outlet. As the first air guide plate 34 rotates, when the air guide grooves 36 of the first air guide plate 34 and the second air guide plate 35 are in large-area communication, high-pressure gas flows through the air guide grooves 36 into the cavity of the stirring rod 18. The pressure of the high-pressure gas on the second air guide plate 35 decreases, causing the second air guide plate 35 to return to its original position under the action of the spring. The high-pressure gas flows out through the second outlet of the three-way pipe 42. The telescopic rod 39 returns to its original position under the action of the spring. The gas in the limiting cavity 41 acts as a buffer for the retraction of the telescopic rod 39, reducing the retraction speed of the telescopic rod 39 and preventing the finished product from being blocked by the excessively fast retraction speed. Furthermore, the high-pressure gas flowing out from the second outlet forms a spiral airflow as the stirring rod 18 rotates, further agitating and loosening the finished product. A dustproof net is installed on the second outlet to block the finished product when the telescopic rod 39 retracts. As the guide impeller 33 rotates, the telescopic rod 39 repeats the above actions, cyclically pushing out and retracting.

[0110] A heating wire can also be installed inside the mixing rod 18 chamber to heat the high-pressure gas, so that the high-pressure gas forms a high-temperature airflow in the finished material and comes into full contact with the finished material, reducing the humidity of the finished material and preventing the finished material from absorbing water and clumping during transportation.

[0111] Through the above structural design, the stirring rod 18 is used to stir the finished material. A telescopic rod 39 is set on the stirring rod 18, which extends and retracts cyclically as the stirring rod 18 rotates, realizing the movement of the finished raw material inside and outside the mixing box 12, improving the fluidity of the finished raw material, reducing the mixing dead zone, and blowing out high-pressure gas to loosen the material during stirring. The high-pressure gas forms a spiral airflow as the stirring rod 18 rotates, preventing the finished material from being blown out, improving the mixing efficiency of the finished material, and reducing the agglomeration of the finished material.

[0112] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0113] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0114] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A grinding system for segmented grinding and separate sorting, characterized in that, include: The roller press grinding unit (1), the ball mill grinding unit (2) and the finished product discharge unit (3) are used. The roller press grinding unit (1) uses a roller press (4) to circulate and grind the material. The material that meets the particle size requirements is sorted and sent to the finished product discharge unit (3), and the material that does not meet the particle size requirements is sorted and sent to the ball mill grinding unit (2). The ball mill grinding unit (2) uses a ball mill (5) to circulate and grind the material. The material that meets the particle size requirements is sorted and sent to the finished product discharge unit (3). The finished product discharge unit (3) is equipped with a mixer at the end. There are five feeding points, A1-A5, respectively located at the inlet end of the roller press (4), the outlet end of the roller press (4), the inlet end of the ball mill (5), the outlet end of the ball mill (5), and the mixer. The roller press grinding unit (1) is equipped with a first classifier (7), which is a three-separation classifier that separates the material according to the preset particle size standard to form large particles, medium and coarse powder and fine powder. The mixing machine includes: The machine body (11) has a mixing tank (12) connected to its center. The mixing tank (12) is used to hold finished materials. The top of the machine body (11) is connected to a feed pipe (19) extending into the mixing tank (12). The bottom of the mixing tank (12) is connected to a discharge pipe (20). The discharge pipe (20) is slidably connected to the bottom of the machine body (11). Partition (13) is connected to the inner wall of the machine body (11) and arranged above the mixing box (12); Turntable (14) is rotatably connected to the center of partition (13) and a bevel gear ring is connected to the edge of turntable (14); A bevel gear (15) meshes with the bevel gear ring of the turntable (14); Rotary shaft 1 (16) is horizontally rotatably connected to the side wall of the machine body (11). One end of the rotating shaft 1 (16) is connected to the center of the bevel gear (15), and the other end is connected to the output end of the motor (17) installed on the side wall of the machine body (11). A stirring rod (18) is vertically connected to the center of a turntable (14) and extends into a mixing tank (12); An air pump (31) is connected to the top of the turntable (14). The air outlet of the air pump (31) is connected to the cavity of the stirring rod (18). The stirring rod (18) includes: An air intake plate (32) is connected to the inner wall of the stirring rod (18) and has multiple through holes vertically. The guide impeller (33) is rotatably connected to the bottom end of the air intake plate (32); The first air guide plate (34) and the second air guide plate (35) are arranged vertically. The first air guide plate (34) and the second air guide plate (35) are slidably connected to the inner wall of the stirring rod (18). The first air guide plate (34) and the second air guide plate (35) are both provided with air guide grooves (36). The first air guide plate (34) is connected to the bottom end of the guide impeller (33). The bottom end of the second air guide plate (35) is connected to the inner wall of the stirring rod (18) with a spring. A vertical rod (37) is vertically connected to the bottom end of the air guide plate (35), and multiple conical blocks (38) are connected at intervals on the vertical rod (37). The side of the conical blocks (38) is set as an inclined surface. Telescopic rod (39), multiple telescopic rods (39) are slidably connected to the side wall of the stirring rod (18), and the inner end of the telescopic rod (39) abuts against the conical surface of the conical block (38), and a limit block (40) is connected on the telescopic rod (39). The limiting cavity (41) is opened on the side wall of the stirring rod (18), and the limiting block (40) is slidably connected in the limiting cavity (41). A spring is connected to one end of the limiting block (40) and the limiting cavity (41). The three-way pipe (42) has an air inlet end connected to the cavity of the stirring rod (18), a first air outlet end connected to the limiting cavity (41), and a second air outlet end passing through the stirring rod (18) toward the outer end of the telescopic rod (39).

2. The segmented grinding and separate sorting grinding system according to claim 1, characterized in that, The first grinding circuit is formed in the roller press grinding unit (1): the outlet end of the roller press (4) is connected to the inlet end of the first classifier (7), the fine powder outlet end of the first classifier (7) is connected to the finished product discharge unit (3), the medium and coarse powder outlet end of the first classifier (7) is connected to the inlet end of the ball mill (5), and the large particle outlet end of the first classifier (7) is connected to the inlet end of the roller press (4).

3. The segmented grinding and separate sorting grinding system according to claim 1, characterized in that, The ball mill grinding unit (2) is equipped with a second classifier (8). The second classifier (8) is a double separation classifier that separates the material according to the preset particle size standard to form coarse powder and fine powder.

4. The segmented grinding and separate sorting grinding system according to claim 3, characterized in that, A second grinding circuit is formed in the ball mill grinding unit (2): the outlet end of the ball mill (5) is connected to the inlet end of the second classifier (8), the fine powder outlet end of the second classifier (8) is connected to the finished product discharge unit (3), and the coarse powder outlet end of the second classifier (8) is connected to the inlet end of the ball mill (5).

5. The segmented grinding and separate sorting grinding system according to claim 3, characterized in that, Also includes: Dust removal unit (9) is connected to the first classifier (7) and the second classifier (8).

6. The segmented grinding and separate sorting grinding system according to claim 1, characterized in that, The mixer also includes a vibration unit, which includes: Rotary shaft two (21) is rotatably connected to the side wall of the machine body (11). A cam (22) is connected to the rotating shaft two (21). Rotary shaft one (16) and rotating shaft two (21) are connected by a pulley group (23). Cylinder 1 (24) is vertically connected to the inner wall of the machine body (11). The top of the piston rod 1 (25) of cylinder 1 (24) abuts against the cam (22). A spring is connected between the piston 1 (26) of cylinder 1 (24) and the inner wall of cylinder 1 (24). Cylinder 2 (27), multiple cylinders 2 (27) are connected to the bottom of the inner wall of the machine body (11) and are evenly arranged on the outside of the mixing box (12). The top of the piston rod 2 (28) of cylinder 2 (27) is connected to the side wall of the mixing box (12). A spring is connected between the piston 2 (29) of cylinder 2 (27) and the inner wall of cylinder 2 (27). The lower part of cylinder 2 (27) is connected to the lower part of cylinder 1 (24) through pipe (30).

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