Horizontal backflow ball mill

Abstract

The invention relates to the technical field of grinding, in particular to a horizontal backflow ball mill which comprises a machine frame, rotating shafts are arranged on the two sides of the top of the machine frame, a barrel is connected between the two rotating shafts, and barrel-shaped filter screens with the two ends adopting opening type design are connected to the inner side wall of one side of the barrel in the axial direction at intervals. The diameters of filter holes of all the cylindrical filter screens are sequentially decreased from inside to outside, a batch of grinding balls are arranged in the cylindrical filter screen at the innermost end, the rotating shafts are of hollow design, a spiral conveyor is installed on the rack, a pipe body of the spiral conveyor penetrates through one rotating shaft and extends into the cylindrical filter screen at the innermost end, and the pipe body of the spiral conveyor is connected with the rotating shafts. And a rotary backflow device is arranged on the inner side wall of the other side of the cylinder body. The effect that the materials can be efficiently ground to the required fineness standard at a time is achieved, the consistency of the particle sizes of the produced materials is guaranteed, excessive grinding of the materials is effectively avoided, continuous grinding of the materials is achieved, the production efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and particularly to a horizontal reflux ball mill. Background Art

[0002] In the new energy field, a large amount of manganese powder is required for preparing manganese tetraoxide as a cathode material, and there are relatively high requirements for the particle size of the manganese powder. At present, the quality of the equipment on the market for processing electrolytic manganese sheets into applicable manganese powder varies, and a ball mill is generally used to grind electrolytic manganese sheets into manganese powder. However, the existing ball mills have limitations in controlling the final particle size distribution of the materials, and it is difficult to accurately ensure the consistency of the particle size of the produced materials, resulting in a wide range of particle sizes and uneven particle sizes of the products. This means that some materials may be over-ground and too fine, while others may not meet the required fineness standard. Therefore, it is usually necessary to additionally equip screening or grading devices to separate unqualified products, and then send these non-compliant materials back to the ball mill for secondary or even multiple grindings. This method not only increases energy consumption but also significantly reduces production efficiency. In addition, since this operation mode is essentially intermittent, it is difficult to ensure that the materials are ground to the required fineness standard at one time, which further limits the processing efficiency. Summary of the Invention

[0003] The present invention provides a horizontal reflux ball mill, which aims to grind materials to the required fineness standard at one time to ensure the consistency of the particle size of the produced materials and effectively avoid over-grinding of the materials.

[0004] To achieve the above object, the present invention provides the following technical solution: A horizontal reflux ball mill, including a frame. On both sides of the top of the frame, there are rotating shafts. A cylinder body is connected between the two rotating shafts. The cylinder body is circumferentially and spacedly provided with discharge ports. An outer cylinder is rotatably connected to the outer wall of the cylinder body. The bottom of the outer cylinder is communicated with a discharge hopper fixed on the frame. A driving component for driving the cylinder body to rotate is provided on the frame. On the inner side wall of one side of the cylinder body, there are axially spacedly connected cylindrical filters with both ends designed to be open. The pore diameters of the cylindrical filters from the inside to the outside gradually decrease. Inside the innermost cylindrical filter, there is a batch of grinding balls. The rotating shaft is designed to be hollow. A screw conveyor is installed on the frame. The pipe body of the screw conveyor passes through one of the rotating shafts and extends into the innermost cylindrical filter to feed materials into the innermost cylindrical filter. On the inner side wall of the other side of the cylinder body, there is a rotary reflux device. Inside the remaining cylindrical filters except the innermost one, there are screw push rods. The screw push rods are fixedly connected to the side wall of the rotary reflux device. The screw push rods rotate to feed the materials in the corresponding cylindrical filters into the rotary reflux device, and the rotary reflux device feeds the materials inside it back into the innermost cylindrical filter.

[0005] Preferably, the rotary refluxer includes a circular seat rotatably connected to the inner side wall on the other side of the cylinder body. A plurality of annular grooves are circumferentially spaced on the circular seat, and the annular grooves correspond to the cylindrical filters one by one. The cylindrical filters are slidably arranged in the corresponding annular grooves. A plurality of return material grooves are circumferentially spaced on the circular seat, and the return material grooves communicate with the annular grooves except the innermost annular groove. A plurality of discharge grooves are circumferentially spaced on the circular seat, and the discharge grooves correspond to the return material grooves one by one. The discharge grooves communicate with the corresponding return material grooves, and the discharge grooves are used to return the material to the innermost cylindrical filter. A plurality of return plates are circumferentially spaced and connected to the inner wall of the outermost annular groove, and the return plates correspond to the return material grooves one by one. The return plates are located in the corresponding return material grooves, and the return plates are used to guide the material into the discharge grooves. A servo motor is installed on the frame, a rotating shaft is connected to the output shaft of the servo motor, the rotating shaft passes through the adjacent rotating shaft and the cylinder body, the rotating shaft is connected to the circular seat, and the spiral push rod is fixedly connected to the side wall of the circular seat.

[0006] Preferably, a lining is connected to the inner wall of the cylinder body to protect the cylinder body and the grinding balls. A plurality of discharge ports for discharging materials are circumferentially spaced on the lining.

[0007] Preferably, a scraping plate for cleaning the inner wall of the lining is connected to the side surface of the circular seat.

[0008] Preferably, the shape of the scraping plate is spiral.

[0009] Preferably, a baffle that can be pulled outwards is slidably connected to the discharge port of the discharge hopper.

[0010] Preferably, a scraping plate located inside the outer cylinder is connected to the outer wall of the cylinder body to clean the materials inside the outer cylinder.

[0011] Preferably, the driving assembly includes a driving motor installed on the frame. A gear is connected to the output shaft of the driving motor, and a gear ring meshing with the gear is connected to the outer wall of the cylinder body.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: By arranging cylindrical filters with gradually decreasing filter hole diameters from the inside to the outside in the cylinder body and arranging grinding balls inside the innermost cylindrical filter, finer particles can be gradually screened out to ensure that the particle size of the final product meets the requirements. Through the cooperation of the spiral push rod and the rotary refluxer, the unqualified materials inside the cylindrical filters except the innermost cylindrical filter can be returned to the innermost cylindrical filter for grinding, achieving the effect of efficiently grinding the materials to the required fineness standard at one time, ensuring the consistency of the particle size of the produced materials, and effectively avoiding over-grinding of the materials. It not only realizes continuous grinding of the materials, improves production efficiency, but also reduces energy consumption, reflecting the advantages of energy conservation and environmental protection. Description of the Drawings

[0013] Figure 1 Schematic three-dimensional structure diagram of the present invention.

[0014] Figure 2 Schematic three-dimensional structure diagram of the drive assembly of the present invention.

[0015] Figure 3 Partial cross-sectional view of the present invention.

[0016] Figure 4 Installation schematic diagram of the rotary refluxer, spiral push rod and scraper of the present invention.

[0017] Figure 5 Schematic three-dimensional structure diagram of the screw conveyor of the present invention.

[0018] Figure 6 Installation schematic diagram of the screw conveyor and rotary refluxer of the present invention.

[0019] Figure 7 Schematic three-dimensional structure diagram of the rotary refluxer of the present invention.

[0020] Figure 8 Partial three-dimensional structure diagram of the rotary refluxer of the present invention.

[0021] The reference signs in the drawings are: 1-frame, 2-rotating shaft, 3-barrel, 31-discharge port, 32-lining, 4-outer cylinder, 41-discharge hopper, 42-baffle, 51-drive motor, 52-gear, 53-toothed ring, 6-cylindrical filter screen, 7-grinding balls, 8-screw conveyor, 9-rotary refluxer, 91-round seat, 92-annular groove, 93-reflux groove, 94-discharge groove, 95-reflux plate, 96-servo motor, 97-rotating shaft, 10-spiral push rod, 11-scraper, 12-scraping plate. Detailed implementation manners

[0022] See Figures 1-5, a horizontal reflux ball mill, comprising a frame 1. The left and right sides of the top of the frame 1 are both rotatably connected by bearings to a rotating shaft 2. A cylinder 3 is connected between the two rotating shafts 2. The cylinder 3 is circumferentially spaced with discharge ports 31. An outer cylinder 4 is rotatably connected to the outer wall of the cylinder 3. The bottom of the outer cylinder 4 communicates with a discharge hopper 41. The discharge hopper 41 is fixedly connected to the frame 1 through a fixed rod. A driving assembly for driving the cylinder 3 to rotate is provided on the frame 1. The driving assembly includes a driving motor 51 installed at the lower part of the left inner wall of the frame 1. A gear 52 is connected to the output shaft of the driving motor 51. A gear ring 53 located on the left side of the outer cylinder 4 is connected to the outer wall of the cylinder 3. The gear ring 53 meshes with the gear 52. Three cylindrical filters 6 are axially spaced and connected to the left inner wall of the cylinder 3. The pore diameters of the three cylindrical filters 6 from the inside to the outside decrease in sequence, so as to be able to gradually screen out finer particles and ensure that the particle size of the final product meets the requirements. A batch of grinding balls 7 is provided inside the innermost cylindrical filter 6. The rotating shaft 2 is of a hollow design. A screw conveyor 8 is installed on the left side of the frame 1. The pipe body of the screw conveyor 8 passes through the left rotating shaft 2 and extends into the innermost cylindrical filter 6. The discharge port of the screw conveyor 8 is opened at the bottom of the pipe body and is in a strip shape, so as to be able to evenly feed the material into the innermost cylindrical filter 6. The screw conveyor 8 is a prior art and will not be elaborated here. A rotary reflux device 9 is provided on the right inner wall of the cylinder 3. Two spiral push rods 10 are circumferentially spaced in each of the cylindrical filters 6 except the innermost one. The right ends of the spiral push rods 10 are fixedly connected to the left side wall of the rotary reflux device 9. The spiral push rods 10 are in contact with the inner wall of the cylindrical filter 6. The rotation of the rotary reflux device 9 drives the spiral push rods 10 to rotate. The rotation of the spiral push rods 10 sends the material in the corresponding cylindrical filter 6 into the rotary reflux device 9. The rotation of the rotary reflux device 9 sends the material inside it back to the innermost cylindrical filter 6.

[0023] See Figures 6-8, the rotary refluxer 9 includes a circular seat 91 rotatably connected to the inner wall on the right side of the cylinder body 3. Three annular grooves 92 are circumferentially spaced apart on the left side of the circular seat 91. The three annular grooves 92 correspond to the three cylindrical filters 6 one by one. The cylindrical filters 6 are slidably arranged in the corresponding annular grooves 92. Eight material return grooves 93 are circumferentially spaced apart on the left side of the circular seat 91. The material return grooves 93 communicate with the annular grooves 92 except for the innermost annular groove 92. Eight discharge grooves 94 are circumferentially spaced apart on the left side of the circular seat 91. The eight discharge grooves 94 correspond to the eight material return grooves 93 one by one. The discharge groove 94 communicates with the corresponding material return groove 93. The discharge groove 94 is located inside the innermost annular groove 92. The discharge groove 94 is designed to be inclined with the left end lower and the right end higher, so as to smoothly introduce the material into the innermost cylindrical filter 6 to the left. Along the circumferential direction, eight material return plates 95 are spaced apart and connected to the inner wall of the outermost annular groove 92. The eight material return plates 95 correspond to the eight material return grooves 93 one by one. The material return plate 95 is located in the corresponding material return groove 93. The inner wall of the annular groove 92 is designed to be an inclined surface, so as to smoothly introduce the material between two adjacent material return plates 95 to the right. The material return plate 95 is used to introduce the material into the discharge groove 94. A servo motor 96 is installed on the upper right side of the frame 1. A rotating shaft 97 is connected to the output shaft of the servo motor 96. The rotating shaft 97 passes through the right rotating shaft 2 and the cylinder body 3 and is connected to the circular seat 91. The rotating shaft 97 is rotatably matched with the cylinder body 3. The right end of the spiral push rod 10 is fixedly connected to the left side wall of the circular seat 91.

[0024] Pour the electrolytic manganese flakes into the feed hopper of the screw conveyor 8, and the electrolytic manganese flakes will then enter the tube body of the screw conveyor 8. Controlling the screw conveyor 8 to work can convey the electrolytic manganese flakes to the right. Subsequently, the electrolytic manganese flakes are discharged from the long strip-shaped discharge port at the bottom of the tube body of the screw conveyor 8 into the innermost cylindrical filter 6. Control the driving motor 51 to work to drive the gear 52 to drive the gear ring 53 to rotate, thereby driving the cylinder body 3 to rotate, and then driving the cylindrical filter 6 to rotate. During the rotation of the cylinder body 3 and the cylindrical filter 6, due to the action of centrifugal force, the grinding balls 7 will be lifted to a certain height and then fall to impact and friction the material in the innermost cylindrical filter 6, so as to realize the crushing and refinement of the material, and then grind the electrolytic manganese flakes into powder. As the cylinder body 3 and the cylindrical filter 6 rotate, the powder with a particle size smaller than the filter holes of the innermost cylindrical filter 6 will be discharged into the middle cylindrical filter 6, and the powder with a particle size smaller than the filter holes of the middle cylindrical filter 6 will continue to be discharged into the outermost cylindrical filter 6. The qualified manganese powder with a particle size smaller than the filter holes of the outermost cylindrical filter 6 is discharged into the cylinder body 3 and discharged from the discharge port 31 on the cylinder body 3 into the outer cylinder 4, and finally discharged downward from the discharge hopper 41. A container can be placed below the discharge hopper 41 to collect the manganese powder.

[0025] Meanwhile, the control servo motor 96 drives the rotating shaft 97 to drive the circular seat 91 to rotate, and the circular seat 91 rotates in the opposite direction to the rotation direction of the cylinder body 3. The rotation of the circular seat 91 drives the return material plate 95 and the spiral push rod 10 to rotate. The spiral push rod 10 inside the middle cylindrical filter screen 6 rotates, and pushes the materials blocked by the middle cylindrical filter screen 6 to the right into the middle annular groove 92. The spiral push rod 10 inside the outermost cylindrical filter screen 6 rotates, and pushes the materials blocked by the outermost part to the right into the outermost annular groove 92. The materials then enter between two adjacent return material plates 95. When the return material plate 95 rotates, it pushes the materials upward. When the return material plate 95 rotates to the upper side, the materials slide along the return material plate 95 into the discharge groove 94, and flow back into the innermost cylindrical filter screen 6 through the discharge groove 94 for re-grinding. In this way, this ball mill can gradually screen out finer particles by arranging cylindrical filter screens 6 with gradually decreasing filter hole diameters from the inside to the outside in the cylinder body 3, and setting grinding balls 7 inside the innermost cylindrical filter screen 6, ensuring that the particle size of the final product meets the requirements. Through the cooperation of the spiral push rod 10 and the rotary reflux device 9, the unqualified materials inside the other cylindrical filter screens 6 except the innermost cylindrical filter screen 6 can be refluxed into the innermost cylindrical filter screen 6 for grinding, achieving the effect of being able to efficiently grind the materials to the required fineness standard at one time, ensuring the consistency of the particle size of the produced materials, and effectively avoiding the over-grinding of the materials. It not only realizes the continuous grinding of the materials, improves the production efficiency, but also reduces the energy consumption, reflecting the advantages of energy conservation and environmental protection.

[0026] See Figures 2-3 , a lining 32 is connected to the inner wall of the cylinder body 3. Discharge ports for discharging materials are arranged at intervals along the circumference on the lining 32. The discharge ports correspond to the discharge openings 31 one by one. The lining 32 is made of polyurethane material. The polyurethane lining 32 has elasticity, which can not only effectively protect the cylinder body 3 and the grinding balls 7, but also absorb impact force, thereby prolonging the service life of the cylinder body 3 and the grinding balls 7, reducing the maintenance and replacement frequency caused by wear. The lining 32 is connected inside the cylinder body 3 by bolts for easy replacement after wear.

[0027] See Figure 4 , a scraper 11 is connected to the left side surface of the circular seat 91. The shape of the scraper 11 is spiral. The spiral scraper 11 contacts the outer wall of the outermost cylindrical filter screen 6 and the inner wall of the lining 32. When the scraper 11 follows the circular seat 91 to rotate, it can effectively scrape off the manganese powder adhered to the lining 32, realizing the cleaning of the lining 32, avoiding the residual accumulation of manganese powder on the lining 32. In this way, not only can the equipment be kept clean, but also the material loss can be reduced. In addition, the rotation of the spiral scraper 11 can also convey the materials to the right, promoting the dispersed discharge of the materials, thereby reducing the risk of blockage of the discharge ports on the lining 32 and the discharge openings 31 on the cylinder body 3.

[0028] See Figure 2, a baffle plate 42 that can be pulled out forward is slidably connected to the discharge port of the discharging hopper 41. By pulling the baffle plate 42 forward, the manganese powder in the discharging hopper 41 can be smoothly discharged downward. When the container for collecting manganese powder is full and needs to be replaced, only by inserting the baffle plate 42 back into the discharge port of the discharging hopper 41 can the discharging be stopped. This not only facilitates the replacement of the container but also effectively avoids the waste and cleaning work caused by the overflow of manganese powder.

[0029] See Figure 2 , two scraping plates 12 located inside the outer cylinder 4 are circumferentially and spacedly connected to the outer wall of the cylinder body 3. The scraping plates 12 are in contact with the inner wall of the outer cylinder 4. When the scraping plates 12 rotate with the cylinder body 3, they can scrape off the manganese powder adhering to the inner wall of the outer cylinder 4, realizing the cleaning of the outer cylinder 4 to avoid the residual accumulation of manganese powder on the inner wall of the outer cylinder 4. This not only keeps the equipment clean but also reduces the loss of materials.

Claims

1. A horizontal reflux ball mill, comprising a frame (1), wherein rotating shafts (2) are provided on both sides of the top of the frame (1), a barrel (3) is connected between the two rotating shafts (2), discharge openings (31) are spaced apart along the circumferential direction on the barrel (3), an outer barrel (4) is rotatably connected to the outer wall of the barrel (3), and the bottom of the outer barrel (4) is connected to a discharge hopper (41) fixed to the frame (1), and a driving component for driving the barrel (3) to rotate is provided on the frame (1), characterized in that: A cylindrical filter screen (6) with both ends of the cylindrical filter screen (6) being open-ended is connected to the inner wall of one side of the cylinder (3) at intervals along the axial direction. The filter holes of the cylindrical filter screens (6) decrease in diameter from the inside to the outside. A group of grinding balls (7) are arranged inside the innermost cylindrical filter screen (6). The rotating shaft (2) is hollow. A screw conveyor (8) is installed on the frame (1). The pipe body of the screw conveyor (8) passes through one of the rotating shafts (2) and extends into the innermost cylindrical filter screen (6) to convey the material into the innermost cylindrical filter screen (6). A rotary return device (9) is provided on the inner side wall of the other side of the cylindrical body (3) in the cylindrical filter screen (6). A screw push rod (10) is provided in each of the cylindrical filter screens (6) except the innermost cylindrical filter screen (6). The screw push rod (10) is fixedly connected to the side wall of the rotary return device (9). The screw push rod (10) rotates to send the material in the corresponding cylindrical filter screen (6) into the rotary return device (9). The rotary return device (9) sends the material in the cylindrical filter screen (6) back to the innermost cylindrical filter screen (6).

2. A horizontal reflux ball mill according to claim 1, characterized in that: The rotary reflow device (9) comprises a round seat (91) rotatably connected to the inner side wall of the other side of the cylinder (3); a plurality of annular grooves (92) are spaced apart along the circumferential direction on the round seat (91); the annular grooves (92) correspond one to one with the cylindrical filter screen (6); the cylindrical filter screen (6) is slidably arranged in the annular grooves (92) corresponding thereto; a plurality of return grooves (93) are spaced apart along the circumferential direction on the round seat (91); the return grooves (93) are connected to the remaining annular grooves (92) except the innermost annular groove (92); a plurality of discharge grooves (94) are spaced apart along the circumferential direction on the round seat (91); the discharge grooves (94) correspond one to one with the return grooves (93); the discharge grooves (94) are connected to the corresponding return grooves (93) The discharge trough (94) is used to return the material to the innermost cylindrical filter screen (6). A plurality of return plates (95) are connected to the inner wall of the outermost annular groove (92) at intervals along the circumferential direction. The return plates (95) correspond to the return troughs (93) one by one. The return plates (95) are located in the corresponding return troughs (93). The return plates (95) are used to guide the material into the discharge trough (94). A servo motor (96) is installed on the frame (1). A rotating shaft (97) is connected to the output shaft of the servo motor (96). The rotating shaft (97) passes through the rotating shaft (2) and the cylinder (3) adjacent thereto. The rotating shaft (97) is connected to the round seat (91). The screw push rod (10) is fixedly connected to the side wall of the round seat (91).

3. A horizontal reflux ball mill according to claim 2, characterized in that: An inner liner (32) is connected to the inner wall of the cylinder (3) for protecting the cylinder (3) and the grinding balls (7). Discharge ports for discharging materials are spaced apart along the circumferential direction on the inner liner (32).

4. A horizontal reflux ball mill according to claim 3, characterized in that: A scraper (11) for cleaning the inner wall of the liner (32) is connected to the side surface of the round seat (91).

5. A horizontal reflux ball mill according to claim 4, characterized in that: The scraper (11) is in the shape of a spiral.

6. A horizontal reflux ball mill according to claim 5, characterized in that: A baffle (42) that can be pulled outward is slidably connected to the discharge port of the discharge hopper (41).

7. A horizontal reflux ball mill according to claim 6, characterized in that: The outer wall of the cylinder (3) is connected to a scraper plate (12) located inside the outer cylinder (4) for cleaning the material inside the outer cylinder (4).

8. A horizontal reflux ball mill according to claim 1, characterized in that: The driving assembly comprises a driving motor (51) mounted on the frame (1); a gear (52) is connected to the output shaft of the driving motor (51); and a gear ring (53) meshing with the gear (52) is connected to the outer wall of the cylinder (3).

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