Mining roller type comminution mill

Abstract

The utility model discloses a mining roller type comminutor, which belongs to the field of ore crushing and grinding processing, and comprises a disc body, the disc body is connected with a main motor, a shell is arranged on the disc body, and the middle of the top of the shell extends towards the inside of the shell and is provided with a blanking pipe; a support is arranged on the periphery of the disc body, a grinding roller assembly is arranged on the top face of the support in a supporting mode, and the grinding roller assembly extends into the shell from the exterior of the shell and is in lap joint with the disc body; a stirring bin is arranged on the inner side of the support and surrounds the disc body by a circle, and a discharging opening is formed in the bottom of the stirring bin. A plurality of scraping plates are arranged on the bottom surface of the edge of the disc body, and the scraping plates rotate along with the disc body to stir materials in the stirring bin and push the materials to be discharged along the discharging opening; the roller type comminuting machine for material layer grinding is adopted to grind ores, efficient grinding can be achieved, dry materials or slurry mixtures can be discharged after grinding, and the roller type comminuting machine is suitable for different ore separation systems.

Description

Technical Field

[0001] The utility model belongs to the technical field of ore crushing and grinding processing, and particularly relates to a mine roller crusher. Background Art

[0002] In 2023, the global output of major metals was approximately 250 million tons, and the annual amount of ore processed by ore dressing was approximately 3 billion tons; the steel output was approximately 1.6 billion tons, and the annual amount of ore processed by ore dressing was approximately 3 billion tons. As an industrial power, China processes approximately 1.5 billion tons of ore annually. The processing of ore requires crushing and grinding the ore according to the requirements of ore dressing equipment. Currently, ore processing equipment mainly includes crushers and ball mills. Among them, crushers have a large processing capacity, large product particle size, low efficiency, and high wear. While ball mills have small product particle size, low processing capacity, serious over-grinding, and high power consumption. In the cement industry, vertical roller mills are used. These vertical roller mills adopt bed grinding, integrating drying and powder selection, with a large processing capacity, small finished product particle size, high efficiency, and low power consumption, and are widely used. However, the particle size of ore grinding is larger than that in the cement industry, and there are no drying and air separation conditions, so this type of vertical roller mill cannot be directly applied to the field of ore grinding. At the same time, due to the design of a high baffle ring at the edge of the grinding table, it is not easy to discharge the ground material, resulting in relatively serious over-grinding. After the ore is over-ground, the particle size is too fine to be effectively sorted and refined. Summary of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides a mine roller crusher.

[0004] The utility model is realized as follows: A mine roller crusher includes a disc body. The disc body is connected with a main motor. A housing is arranged on the disc body. A feeding pipe extends from the middle of the top of the housing into the housing. Supports are arranged around the disc body. A grinding roller assembly is supported on the top surface of the supports. The grinding roller assembly extends from the outside of the housing into the housing and is suspended on the disc body.

[0005] A stirring bin is arranged inside the support. The stirring bin surrounds the disc body for one week and has a discharge port at the bottom. The cross-section of the stirring bin is U-shaped, and the U-shaped opening faces the disc body, so that the ground material falls from the edge of the disc body into the stirring bin. A plurality of scraping plates are arranged on the bottom surface of the edge of the disc body. The scraping plates rotate with the disc body. The scraping plates extend into the stirring bin to stir the material in the stirring bin and push the material to be discharged along the discharge port.

[0006] Furthermore, a water spraying pipe penetrates through the side wall of the housing. The water outlet of the water spraying pipe is arranged above the stirring bin. The water spraying pipe injects water into the stirring bin.

[0007] Further, a buffer plate is fixedly connected to the inner wall of the blanking pipe. The buffer plate is inclined from the fixed point towards the inside of the blanking pipe, and its lowest end extends beyond the center line of the blanking pipe.

[0008] Further, a plurality of buffer plates are provided, which are oppositely arranged in sequence along the blanking pipe, and the opposite buffer plates are staggered with each other to slow down the splashing of the material hitting the disc body.

[0009] Further, the grinding roll assembly includes a loading arm. The loading arm is L-shaped. One end of the L-shape is provided with a roller shaft, and a roller is rotatably connected to the roller shaft; the other end of the L-shape of the loading arm is hinged with a loading oil cylinder.

[0010] Further, a loading arm support is arranged on the top surface of the bracket. An articulated hole is arranged on the loading arm support, and the turning point of the L-shape of the loading arm is articulated to the loading arm support.

[0011] Further, the fixed end of the loading oil cylinder is hinged with an oil cylinder base, and the oil cylinder base is fixedly connected to the ground foundation.

[0012] Further, a maintenance hole is provided on the housing corresponding to the grinding roll assembly. A maintenance door is provided on the housing corresponding to the maintenance hole. A matching hole is provided on the maintenance door. The matching hole cooperates with the loading arm so that the loading arm extends into the housing through the matching hole; the maintenance door is used to close the maintenance hole when the crusher is working.

[0013] Further, a movable retaining ring is arranged around the edge of the top surface of the disc body. The movable retaining ring rotates synchronously with the disc body; a fixed retaining ring is arranged on the movable retaining ring. The fixed retaining ring is fixedly connected to the inner wall of the housing. The number of the fixed retaining rings is the same as that of the rollers, and it extends from the feeding end of the roller to the discharging end of the roller to prevent the material from being discharged without being ground.

[0014] Further, the height of the movable retaining ring is set to be 40 - 80 mm.

[0015] The advantages and technical effects of the present utility model are as follows:

[0016] 1. The roller crusher for layer grinding of the present utility model is used to grind ores, which can achieve high-efficiency grinding, and at the same time, the discharged dry materials or slurry mixtures after grinding can be realized, adapting to different ore separation systems.

[0017] 2. Through the design of the combination of the movable retaining ring and the fixed ring, the unmilled materials are guided to the rollers for grinding, reducing the discharge of the unmilled materials and reducing the ineffective circulation amount of the mill. At the same time, the ground materials are discharged in time, reducing the over-grinding of the materials.

[0018] 3. Through the buffer feeding design of the feeding pipe and the design of the grinding disc speed, the stability of the mill operation is ensured, and high efficiency and low power consumption operation are maintained.

[0019] 4. The utility model adopts bed layer grinding, and there is no direct contact between the roller and the disc body, with less wear and low abrasion. Brief Description of the Drawings

[0020] Figure 1 is the top view provided by the embodiment of the utility model;

[0021] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0022] Figure 3 is Figure 2 the sectional view taken along the line B-B in

[0023] Figure 4 is Figure 2 the partial enlarged view at C in

[0024] In the figure: 1. Main motor; 2. Reducer; 3. Disc body; 4. Housing; 5. Feeding pipe; 6. Water spraying pipe; 7. Grinding roller assembly; 8. Roller shaft; 9. Loading arm; 10. Support; 11. Loading oil cylinder; 12. Oil cylinder base; 13. Stirring bin; 14. Combined baffle ring; 15. Scraper; 16. Inspection door; 17. Buffer plate; 18. Roller; 19. Loading arm support; 20. Movable retaining ring; 21. Fixed retaining ring; 22. Fixed plate; 23. Discharge port; 24. Connecting plate; 25. Inspection hole; 26. Piston rod. Detailed Embodiment

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the following further details the utility model in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In the embodiments, unless otherwise specified, the technical means used are the conventional technical means in the art.

[0026] In the embodiments, unless otherwise specified, the technical means used are the conventional technical means in the art.

[0027] Referring to Figures 1 to 4 , a roller crusher for mining, including a disc body 3, the disc body 3 is fixedly connected to a reducer 2, a main motor 1 and the reducer 2 are connected by a coupling, and the main motor 1 drives the disc body 3 to rotate. The speed of the main motor 1 is selected according to the K value, K = n * D(0.5), where n is the grinding disc speed and D is the grinding disc diameter. When grinding ore, the K value is taken as 40 - 55.

[0028] A housing 4 is provided on the disk body 3. The center of the housing 4 coincides with the center line of the disk body 3, and the housing 4 serves to enclose the grinding area. In the middle of the top of the housing 4, a feeding pipe 5 extends into the housing 4. The feeding pipe 5 is fixedly welded to the housing 4.

[0029] A buffer plate 17 is fixedly connected to the inner wall of the feeding pipe 5. The buffer plate 17 is inclined towards the inside of the feeding pipe 5 along the fixed point, and the inclination angle is set to 40 ± 5 degrees, and the lowest end of the buffer plate 17 extends beyond the center line of the feeding pipe 5. The number of the buffer plates 17 is determined according to the length of the feeding pipe 5. The buffer plates 17 are arranged oppositely downward in sequence along the feeding pipe 5, and the oppositely arranged buffer plates 17 are staggered with each other. When the material passes through the buffer plate and falls on the disk body, the impact of the material on the disk body 3 is slowed down and splashing is reduced.

[0030] An inspection hole 25 corresponding to the grinding roller assembly 7 is provided on the housing 4, and the number of the inspection holes 25 is the same as the number of the grinding roller assemblies 7; an inspection door 16 corresponding to the inspection hole 25 is also provided on the housing 4; a fitting hole is machined on the inspection door 16, and the fitting hole is hermetically fitted with the loading arm 9, so that the loading arm 9 extends into the housing 4 from the outside of the housing 4 through the fitting hole. When the crusher is operating, the inspection door 16 closes the inspection hole 25; when the grinder is being inspected, the inspection door 16 can be opened.

[0031] Supports 10 are arranged around the disk body 3. A stirring bin 13 is welded to the inner side of the supports 10. The stirring bin 13 surrounds the disk body 3 for one week. A discharge port 23 is provided at the bottom of the stirring bin 13; the cross section of the stirring bin 13 is U-shaped, and the U-shaped opening is upward, so that the ground material falls from the edge of the disk body 3 into the stirring bin 13; a plurality of connecting plates 24 are welded to the bottom surface of the edge of the disk body 3, and the connecting plates 24 extend into the stirring bin 13. A scraping plate 15 is welded to the part of the connecting plate 24 located in the stirring bin 13. The scraping plate 15 rotates with the disk body 3 to stir the material in the stirring bin 13 and push the material to be discharged along the discharge port 23. Further, the number of the scraping plates 15 is determined according to the material stirring requirement and the size of the disk body 3.

[0032] A water spraying pipe 6 penetrates through the side wall of the housing 4. The water outlet of the water spraying pipe 6 is arranged above the stirring bin 13, and the water spraying pipe 6 can inject water into the stirring bin 13; for some ores, such as graphite ore, water separation is adopted for subsequent separation. Before entering the separation system, the discharged material and water need to be stirred into a slurry state. When water separation is required for separation, the water spraying pipe 6 is opened to inject water into the stirring bin 13, and at the same time, the scraping plate 15 rotates synchronously with the disk body 3 to stir and mix the material and water in the stirring bin 13 into a slurry state and then discharge it, meeting the requirements of subsequent water separation.

[0033] The top surface of the support 10 is provided with a grinding roller assembly 7. The grinding roller assembly 7 extends from the outside of the housing 4 into the inside of the housing 4. The grinding roller assembly 7 includes a loading arm 9. The loading arm 9 is arranged in an L shape, and one end of it is fixedly connected with a roller shaft 8. The roller shaft 8 is rotatably connected with a roller 18. The roller 18 is suspended on the disc body 3 and is used for grinding the materials on the disc body 3. The other end of the L-shaped loading arm 9 is provided with a loading oil cylinder 11. The loading oil cylinder 11 includes a piston rod 26. The other end of the L-shaped loading arm 9 is hinged with the piston rod 26.

[0034] The top surface of the support 10 is provided with a loading arm support 19. The loading arm support 19 is provided with a hinge hole. Preferably, the turning point of the L-shaped loading arm 9 is hinged between two loading arm supports 19.

[0035] The end of the loading oil cylinder 11 is hinged with an oil cylinder base 12. The oil cylinder base 12 is fixedly connected with the ground foundation. The loading oil cylinder 11 drives the roller 18 to rotate along the hinge center line of the loading arm 9 and the loading arm support 19 through the telescopic movement of the piston rod 26. When the disc body 3 rotates, it drives the roller 18 to rotate together, so that the roller 18 grinds the materials on the disc body 3. When the piston rod 26 extends upward, the roller 18 approaches the disc body 3. By adjusting the extension amount of the piston rod 26, the distance between the roller 18 and the disc body 3 is adjusted, that is, the grinding pressure of the roller 18 on the materials is adjusted, and the particle size of the ground materials is controlled.

[0036] A moving retaining ring 20 is bolted to the periphery of the top surface of the disc body 3. The moving retaining ring 20 rotates synchronously with the disc body 3 and bears the pressure of the roller 18 at the same time. The height of the moving retaining ring 20 is set to be 40 - 80 mm. A fixed retaining ring 21 is arranged above the moving retaining ring 20. The fixed retaining ring 21 is welded to the inner wall of the housing 4 through a fixing plate 22. The number of the fixed retaining rings 21 is the same as that of the rollers 18, and it extends from the feeding end of the roller 18 to the discharging end of the roller 18 to prevent the materials from being discharged without being ground. The area where there is no fixed retaining ring 21 between two adjacent rollers 18 is the discharging area. The materials ground by the rollers 18 are discharged from the discharging area in time and enter the mixing bin 13. The newly added materials are blocked by the fixed retaining ring 21 and conveyed under the rollers 18 for grinding. The combined setting of the moving retaining ring 20 and the fixed retaining ring 21 not only reduces the over-grinding of the materials caused by multiple grinding of the materials on the disc body, but also reduces the improper discharge of the unground materials between the two rollers, and reduces the ineffective circulation of the system.

[0037] The working principle of the present utility model is introduced as follows: Taking the roller crusher with two rollers as an example, the material falls to the center of the disk body through the feeding pipe for buffering. Under the action of the centrifugal force of the rotating disk body, it is evenly spread on the disk body to form a material layer. Then, the piston rod of the loading oil cylinder jacks upward, driving the roller to move downward close to the disk body. Driven by the disk body, the roller rotates while rolling the material on the disk body. The rolled material is discharged in time from the discharge area between the two rollers where no fixed retaining ring is provided, and falls into the mixing bin and is then conveyed to the discharge port by the scraper for discharge. Or, when water separation is required for sorting, it is discharged after adding water and stirring. When the grinding is completed and the machine needs to be stopped, first retract the piston rod of the loading oil cylinder to drive the roller to move upward away from the disk body. Then stop the rotation of the grinding disk and stop the mill.

[0038] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A roller crusher for mining, comprising a disk body (3), the disk body (3) is connected with a main motor (1), a housing (4) is arranged on the disk body (3), and a feeding pipe (5) extends from the middle of the top of the housing (4) into the housing (4); brackets (10) are arranged around the disk body (3), a grinding roll assembly (7) is supported on the top surface of the brackets (10), the grinding roll assembly (7) extends from the outside of the housing (4) into the housing (4) and is suspended on the disk body (3). It is characterized in that: A stirring bin (13) is arranged inside the bracket (10), the stirring bin (13) surrounds the disk body (3) for one week, and a discharge port (23) is arranged at the bottom; the cross section of the stirring bin (13) is U-shaped, and the U-shaped opening faces the disk body (3), so that the ground materials fall from the edge of the disk body (3) into the stirring bin (13); a plurality of scraping plates (15) are arranged on the bottom surface of the edge of the disk body (3), the scraping plates (15) rotate with the disk body (3), and the scraping plates (15) extend into the stirring bin (13) to stir the materials in the stirring bin (13) and push the materials to be discharged along the discharge port (23).

2. The roller crusher for mining according to claim 1, wherein: A water spraying pipe (6) penetrates through the side wall of the housing (4), the water outlet of the water spraying pipe (6) is arranged at the upper part of the stirring bin (13), and the water spraying pipe (6) injects water into the stirring bin (13).

3. The roller crusher for mining according to claim 1, wherein: A buffer plate (17) is fixedly connected to the inner wall of the feeding pipe (5), the buffer plate (17) is inclined from the fixed point towards the inside of the feeding pipe (5), and the lowest end of the buffer plate (17) extends beyond the center line of the feeding pipe (5).

4. The roller crusher for mining according to claim 3, wherein: A plurality of buffer plates (17) are arranged, and are arranged oppositely in sequence along the feeding pipe (5), and the opposite buffer plates (17) are staggered with each other to slow down the splashing of the materials hitting the disk body (3).

5. The roller crusher for mining according to claim 1, wherein: The grinding roll assembly (7) comprises a loading arm (9), the loading arm (9) is L-shaped, one end of the L-shape is provided with a roller shaft (8), and a roller (18) is rotatably connected to the roller shaft (8); the other end of the L-shape of the loading arm (9) is hinged with a loading oil cylinder (11).

6. The roller crusher for mining according to claim 5, wherein: A loading arm support (19) is arranged on the top surface of the bracket (10), a hinge hole is arranged on the loading arm support (19), and the turning point of the L-shape of the loading arm (9) is hinged to the loading arm support (19).

7. The roller crusher for mining according to claim 6, wherein: The fixed end of the loading oil cylinder (11) is hinged with an oil cylinder base (12), and the oil cylinder base (12) is fixedly connected with the ground foundation.

8. The roller crusher for mining according to claim 5, wherein: An inspection hole (25) is provided on the housing (4) corresponding to the grinding roller assembly (7), and an inspection door (16) is provided on the housing (4) corresponding to the inspection hole (25). A mating hole is provided on the inspection door (16), and the mating hole cooperates with the loading arm (9) so that the loading arm (9) extends into the housing (4) through the mating hole; when the crusher is working, the inspection door (16) is used to close the inspection hole (25).

9. The mining roller crusher according to claim 5, wherein: A moving retaining ring (20) is provided around the top edge of the disc body (3), and the moving retaining ring (20) rotates synchronously with the disc body (3); a fixed retaining ring (21) is provided on the moving retaining ring (20), and the fixed retaining ring (21) is fixedly connected to the inner wall of the housing (4). The number of the fixed retaining rings (21) is the same as that of the rollers (18), and the fixed retaining rings (21) extend from the feeding end of the rollers (18) to the discharging end of the rollers (18) to prevent the material from being discharged without being ground.

10. The mining roller crusher according to claim 9, wherein: The height of the moving retaining ring (20) is set to be 40 - 80 mm.

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