A dry ball mill

Abstract

The utility model belongs to the technical field of ball mill device, disclose a kind of dry method ball mill, including ball mill barrel, the one end of ball mill barrel is equipped with conical opening, another end is fixedly connected with support shaft, and the inner wall of conical opening is rotatably connected with feed hopper by rotating sealing plate, the top of feed hopper is equipped with first sealing cover, and the side of feed hopper is connected with vacuum discharge device, the lower end of vacuum discharge device is connected with barrel, the one end of ball mill barrel away from feed hopper is equipped with air inlet, and the bottom of ball mill barrel is equipped with sundry material separation port, and sundry material separation port is equipped with ball separation grid and second sealing cover;The utility model is connected feed hopper by rotating sealing, and it is convenient to feed when ball milling, and it is convenient to continuous ball milling, by setting vacuum discharge device on feed hopper, it is convenient to mill while discharging powder, improve ball milling efficiency, by setting rotating sealing plate, it is convenient to rotatably connect feed hopper, and it is convenient to feed without stopping, by setting filter plate, it is convenient to avoid material from air inlet leakage.

Description

Technical Field

[0001] This utility model relates to a dry ball mill and belongs to the technical field of ball mill equipment. Background Technology

[0002] The main methods for recycling cemented carbide include zinc melting, mechanical crushing, electrochemical methods, air oxidation, and acid leaching. Air oxidation involves placing waste cemented carbide metal in a container in an open, enclosed, or partially enclosed environment and heating it to accelerate oxidation. Oxidized waste cemented carbide metal may clump or be too large, requiring pulverization to facilitate subsequent recycling processes. Horizontal ball mills are commonly used cemented carbide pulverizing devices, but existing horizontal ball mills typically involve batch grinding. All material in the mill must be ground to the required powder size before the powder can be unloaded, and then material can be added for the next batch of grinding, resulting in poor efficiency. Therefore, a dry ball mill that allows for simultaneous grinding and powder output is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a dry ball mill that facilitates simultaneous ball milling and powder output.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dry ball mill, comprising a ball mill cylinder, one end of which is provided with a conical opening, and a support shaft is fixedly connected to the outer wall of the other end. The conical opening and the support shaft are mounted on a frame through bearings sleeved on their outer walls. A geared motor is mounted on the frame, and the geared motor is drivenly connected to the outer wall of the ball mill cylinder. A feed hopper is rotatably connected to the inner wall of the conical opening through a rotating sealing plate. A first sealing cover is provided at the top of the feed hopper. A vacuum discharge device is connected to one side of the feed hopper through a discharge pipe. A material bucket is connected to the lower end of the vacuum discharge device. An air inlet is provided at the end of the ball mill cylinder away from the feed hopper. A debris separation port is provided at the bottom of the ball mill cylinder, and a ball-separating grid and a second sealing cover are provided inside the debris separation port.

[0005] Preferably, a cooling water jacket is fixedly fitted onto the outer wall of the ball mill cylinder. The support shaft is a hollow rotating shaft, and the inner cavity of the support shaft is connected to the cooling water jacket. A water inlet pipe, which is not connected to the inner cavity of the support shaft, is provided inside the inner cavity of the support shaft. A double-channel rotary joint is rotatably connected to the end of the support shaft away from the ball mill cylinder. One passage of the double-channel rotary joint is connected to the inner cavity of the support shaft and is connected to a water outlet pipe. One end of the water inlet pipe is connected to the water inlet pipe through the other passage of the double-channel rotary joint, and the other end extends to the end of the ball mill cylinder away from the support shaft and is connected to the cooling water jacket. The air inlet passes through the cooling water jacket and is connected to the outside.

[0006] Preferably, the feed hopper and the vacuum discharge device are fixedly connected to the same horizontally movable support, the discharge pipe is a U-shaped pipe, the air inlet is provided with a filter plate, the filter plate is provided with a plurality of conical filter holes, the conical filter holes are larger at the end near the ball mill cylinder and smaller at the end away from the ball mill cylinder, and the ball separator grid and the second sealing cover are detachably installed on the impurity separation port by bolts.

[0007] Preferably, the rotary sealing plate is fixedly sleeved on the outer wall of one end of the feed hopper extending into the conical opening. A first annular groove is provided on the outer wall of the rotary sealing plate, and a first O-ring is installed in the first annular groove. The outer wall of the first O-ring slides against the inner wall of the conical opening. A second O-ring is provided on the outer wall of the rotary sealing plate and on both sides of the first O-ring.

[0008] Preferably, the second O-ring is snapped onto the outer wall of the rotary sealing plate by a snap-fit ​​post.

[0009] Preferably, the lower surface of the first sealing cover is provided with a first rubber sealing ring, and a telescopic rod is hinged to the bottom of one end of the first sealing cover through a first hinge seat. The end of the telescopic rod away from the first sealing cover is hinged to the outer wall of the feed hopper through a second hinge seat. The first sealing cover is hinged to the feed hopper through a third hinge seat. The telescopic rod is an electric push rod or a hydraulic rod.

[0010] Preferably, the vacuum discharge device includes a filter, the upper end of which is connected to a vacuum pump, one side of which is connected to a discharge pipe, and the discharge port at the lower end of the filter is connected to a material tank via a connector.

[0011] Preferably, the connector includes a connecting tube sleeved on the outer wall of the discharge port, the connecting tube being threaded to the discharge port, a third O-ring being provided on the inner wall of the connecting tube, and a second rubber sealing ring being fixedly connected to the lower end of the connecting tube.

[0012] Preferably, the outer wall of the discharge port is a smooth surface or has a self-lubricating coating, and a rotating ring is fixedly connected to the outer wall of the connecting pipe, the outer wall of the rotating ring being an anti-slip surface.

[0013] Preferably, the outer wall of the lower end of the connecting pipe is provided with an external thread, and the inner wall of the inlet at the top of the material barrel is provided with a corresponding internal thread.

[0014] Beneficial effects

[0015] The dry ball mill of this invention uses a rotary seal to connect the feed hopper, which facilitates feeding during ball milling and enables continuous ball milling. By setting a vacuum discharge device on the feed hopper, it is easy to discharge powder while ball milling, thereby improving ball milling efficiency. By setting a rotary seal plate, it is easy to rotate the feed hopper, which is convenient for feeding without stopping the machine. By setting a filter plate, it is easy to prevent material from leaking out of the air inlet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the first sealing cover and the feed hopper in this utility model;

[0018] Figure 3 This is a partial side sectional view of the rotating sealing plate in Embodiment 1 of this utility model;

[0019] Figure 4 This is a partial side sectional view of the filter plate in this utility model;

[0020] Figure 5 This is a side sectional view of the discharge port in Embodiment 1 of this utility model;

[0021] Figure 6 This is a partial side sectional view of the rotating sealing plate in Embodiment 2 of this utility model;

[0022] Figure 7 This is a side sectional view of the discharge port in Embodiment 3 of this utility model.

[0023] In the diagram: 1. Grinding mill cylinder; 2. Conical opening; 3. Support shaft; 4. Bearing; 5. Gear motor; 6. Rotary sealing plate; 7. Feed hopper; 8. First sealing cover; 9. Discharge pipe; 10. Material bucket; 11. Air inlet; 12. Impurity separation port; 13. Cooling water jacket; 14. Double-channel rotary joint; 15. Filter plate; 16. Conical filter hole; 17. First O-ring seal; 18. Second O-ring seal; 19. Snap-fit ​​post; 20. First rubber seal; 21. First hinge seat; 22. Telescopic rod; 23. Second hinge seat; 24. Third hinge seat; 25. Filter; 26. Vacuum pump; 27. Discharge port; 28. Connecting pipe; 29. ​​Third O-ring seal; 30. Second rubber seal. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] like Figure 1-5 As shown, this embodiment provides a technical solution: a dry ball mill, including a ball mill cylinder 1. One end of the ball mill cylinder 1 has a conical opening 2 coaxially arranged with the ball mill cylinder 1, and a support shaft 3 coaxially arranged with the ball mill cylinder 1 is fixedly connected to the outer wall of the other end. The conical opening 2 and the support shaft 3 are mounted on a frame through bearings 4 sleeved on their outer walls. The inner wall of the conical opening 2 is a smooth surface or has a wear-resistant non-stick coating. A geared motor 5 is mounted on the frame, and the geared motor 5 is drivenly connected to the outer wall of the ball mill cylinder 1. In this embodiment, the geared motor 5 and the ball mill cylinder 1 are linked... In this embodiment, the geared motor 5 is a reversible motor. A feed hopper 7 is rotatably connected to the inner wall of the conical opening 2 via a rotating sealing plate 6. The rotating sealing plate 6 rotates and seals the conical opening 2. The rotating sealing plate 6 is fixedly sleeved on the outer wall of the end of the feed hopper 7 extending into the conical opening 2. A first annular groove is formed on the outer wall of the rotating sealing plate 6, and a first O-ring seal 17 is installed in the first annular groove. The outer wall of the first O-ring seal 17 slides against the inner wall of the conical opening 2, sealing the conical opening 2. A second O-ring 18 is provided on both sides of the first O-ring 17 on the outer side wall. There is one or more rotating sealing plates 6. A first sealing cover 8 is provided at the top of the feed hopper 7. A vacuum discharge device is connected to one side of the feed hopper 7 via a discharge pipe 9. The inner wall of the discharge pipe 9 is smooth or has a wear-resistant non-stick coating. A material bucket 10 is connected to the lower end of the vacuum discharge device. The vacuum discharge device includes a filter 25, which in this embodiment is a bag filter. The upper end of the filter 25 is connected to a vacuum pump 26 in this embodiment. 6 is a Roots vacuum pump 26. One side of the filter 25 is connected to the discharge pipe 9. The discharge port 27 at the lower end of the filter 25 is connected to the inlet at the top of the material barrel 10 through a connector. The ball mill cylinder 1 has an air inlet 11 at the end away from the feed hopper 7. The bottom of the ball mill cylinder 1 has a debris separation port 12, which facilitates the separation of particles that cannot be crushed by ball milling from the grinding media balls in the lumps of hard alloy. The debris separation port 12 is equipped with a ball-separating grid and a second sealing cover. The grid holes of the ball-separating grid are larger than the outer diameter of the particles that cannot be crushed by ball milling and smaller than the diameter of the grinding media balls.

[0027] Specifically, a cooling water jacket 13 is fixedly fitted onto the outer wall of the ball mill cylinder 1. The support shaft 3 is a hollow rotating shaft. The inner cavity of the support shaft 3 is connected to the cooling water jacket 13. The inner cavity of the support shaft 3 is provided with a water inlet pipe that is not connected to the inner cavity of the support shaft 3. A double-channel rotary joint 14 is rotatably connected to the end of the support shaft 3 away from the ball mill cylinder 1. One passage of the double-channel rotary joint 14 is connected to the inner cavity of the support shaft 3 and is connected to a water outlet pipe. One end of the water inlet pipe is connected to the water inlet pipe through the other passage of the double-channel rotary joint 14, and the other end extends to the end of the ball mill cylinder 1 away from the support shaft 3 and is connected to the cooling water jacket 13. The air inlet 11 passes through the cooling water jacket 13 and is connected to the outside, but is not connected to the cooling water jacket 13.

[0028] Specifically, the feed hopper 7 and the vacuum discharge device are fixedly connected to the same horizontally movable support. The discharge pipe 9 is a ︿-shaped pipe. The air inlet 11 is equipped with a filter plate 15. The filter plate 15 has several conical filter holes 16 that penetrate through the filter plate 15 from the thickness direction. The conical filter holes 16 are larger at the end near the ball mill cylinder 1 and smaller at the end away from the ball mill cylinder 1. The ball separator and the second sealing cover are detachably installed on the impurity separation port 12 by bolts. During ball milling, the ball separator is removed and the second sealing cover is installed on the impurity separation port 12 to seal the cylinder wall of the ball mill cylinder 1. When it is necessary to discharge particles that cannot be crushed by ball milling from the ball mill cylinder 1, the second sealing cover is removed, the ball separator is installed on the impurity separation port 12, and the ball mill cylinder 1 is rotated to discharge particles that cannot be crushed by ball milling, while the grinding media balls are retained inside the ball mill cylinder 1.

[0029] Specifically, the lower surface of the first sealing cover 8 is provided with a first rubber sealing ring 20 to facilitate sealing of the feed hopper 7. The bottom of one end of the first sealing cover 8 is hinged to a telescopic rod 22 through a first hinge seat 21. The end of the telescopic rod 22 away from the first sealing cover 8 is hinged to the outer wall of the feed hopper 7 through a second hinge seat 23. The first sealing cover 8 is hinged to the feed hopper 7 through a third hinge seat 24. The telescopic rod 22 is an electric push rod or a hydraulic rod.

[0030] Specifically, the connector includes a connecting tube 28 sleeved on the outer wall of the discharge port 27. The connecting tube 28 is threaded to the discharge port 27. The outer wall of the discharge port 27 is provided with an external thread. The inner wall of the upper end of the connecting tube 28 is provided with a corresponding internal thread. A third O-ring seal 29 is provided on the inner wall of the connecting tube 28 below the internal thread. The inner side wall of the third O-ring seal 29 slides and fits against the outer wall of the discharge port 27. A third annular groove is provided on the inner wall of the connecting tube 28. The third O-ring seal 29 is installed in the third annular groove. A second rubber seal 30 is fixedly connected to the lower end of the connecting tube 28. The lower surface of the second rubber seal 30 fits tightly against the inlet at the top of the material barrel 10 and seals the inlet of the material barrel 10. The outer wall of the discharge port 27 and the lower side of the external thread are smooth surfaces or have a self-lubricating coating. A rotating ring is fixedly connected to the outer wall of the connecting tube 28. The outer wall of the rotating ring is an anti-slip surface.

[0031] The working process of this utility model is as follows: First, the first sealing cover 8 is opened, and the crushed, lumpy recycled cemented carbide is fed into the ball mill cylinder 1 through the feed hopper 7. Then, the first sealing cover 8 is closed to seal the feed hopper 7. The reduction motor 5 drives the ball mill cylinder 1 to rotate, grinding the recycled cemented carbide. Simultaneously, the vacuum pump 26 on the vacuum discharge device operates. Air inside the ball mill cylinder 1 is extracted by the vacuum pump 26 through the discharge pipe 9 and filter 25, creating a negative pressure inside the ball mill cylinder 1. External air flows into the ball mill cylinder 1 through the air inlet 11, blowing the ground powder to move. The powder, along with the airflow, enters the filter 25 through the discharge pipe 9 for gas-solid separation. The air is then drawn away and discharged by the vacuum pump 26. Alloy powder falls into the material bucket 10 through the discharge port 27 at the bottom of the filter 25. After the lumpy hard alloy in the ball mill 1 is ball-milled for a certain period of time, the first sealing cover 8 is opened, and new lumpy recycled hard alloy is fed into the ball mill 1 through the feed hopper 7, so that continuous ball milling can be carried out without stopping the machine. The dry ball mill of this utility model has a rotary sealing connection to the feed hopper, which facilitates feeding during ball milling and continuous ball milling. By setting a vacuum discharge device on the feed hopper, it is convenient to discharge powder while ball milling, which improves ball milling efficiency. By setting a rotary sealing plate, it is convenient to rotate the feed hopper, which facilitates feeding without stopping the machine. By setting a filter plate, it is convenient to prevent material from leaking out from the air inlet.

[0032] Example 2:

[0033] like Figure 6As shown, this embodiment provides a technical solution: a dry ball mill, including a ball mill cylinder 1, one end of which is provided with a conical opening 2, and a support shaft 3 is fixedly connected to the outer wall of the other end. A feed hopper 7 is rotatably connected to the inner wall of the conical opening 2 through a rotating sealing plate 6. A first annular groove is provided on the outer wall of the rotating sealing plate 6, and a first O-ring 17 is installed in the first annular groove. The outer wall of the first O-ring 17 slides against the inner wall of the conical opening 2. A second O-ring 18 is provided on the outer wall of the rotating sealing plate 6 and on both sides of the first O-ring 17. The second O-ring 18 is snapped onto the outer wall of the rotating sealing plate 6 by a snap-fit ​​post 19. The snap-fit ​​post 19 is fixedly connected to the second O-ring 18. A spherical or umbrella-shaped snap-fit ​​connector is provided at the end of the snap-fit ​​post 19 away from the second O-ring 18. A snap-fit ​​groove adapted to the snap-fit ​​post 19 is provided on the outer wall of the rotating sealing plate 6. Other structures are the same as in Embodiment 1.

[0034] Example 3:

[0035] like Figure 7 As shown, this embodiment provides a technical solution: a dry ball mill, including a ball mill cylinder 1. One end of the ball mill cylinder 1 is provided with a conical opening 2, and a support shaft 3 is fixedly connected to the outer wall of the other end. A feed hopper 7 is rotatably connected to the inner wall of the conical opening 2 through a rotating sealing plate 6. A vacuum discharge device is connected to one side of the feed hopper 7 through a discharge pipe 9. The vacuum discharge device includes a filter 25. The upper end of the filter 25 is connected to a vacuum pump 26, and one side of the filter 25 is connected to the discharge pipe 9. The discharge port 27 at the lower end of the filter 25 is connected to the inlet at the top of the material barrel 10 through a connector. The connector includes a connecting pipe 28 sleeved on the outer wall of the discharge port 27. The connecting pipe 28 is threaded to the discharge port 27. The outer wall at the lower end of the connecting pipe 28 is provided with an external thread, and the inner wall at the inlet at the top of the material barrel 10 is provided with a corresponding internal thread, which facilitates stable connection of the material barrel 10. Other structures are the same as in Embodiment 1 or 2.

Claims

1. A dry ball mill, comprising a ball mill cylinder (1), wherein one end of the ball mill cylinder (1) is provided with a conical opening (2) and a support shaft (3) is fixedly connected to the outer wall of the other end, the conical opening (2) and the support shaft (3) are mounted on a frame through a bearing (4) sleeved on its outer wall, a geared motor (5) is mounted on the frame, and the geared motor (5) is drivenly connected to the outer wall of the ball mill cylinder (1), characterized in that: The inner wall of the conical opening (2) is rotatably connected to the feed hopper (7) via a rotating sealing plate (6). The top of the feed hopper (7) is provided with a first sealing cover (8). One side of the feed hopper (7) is connected to a vacuum discharge device via a discharge pipe (9). The lower end of the vacuum discharge device is connected to a material bucket (10). The end of the ball mill cylinder (1) away from the feed hopper (7) is provided with an air inlet (11). The bottom of the ball mill cylinder (1) is provided with a material separation port (12). The material separation port (12) is provided with a ball-separating grid and a second sealing cover.

2. The dry ball mill according to claim 1, characterized in that: A cooling water jacket (13) is fixedly sleeved on the outer wall of the ball mill cylinder (1). The support shaft (3) is a hollow rotating shaft. The inner cavity of the support shaft (3) is connected to the cooling water jacket (13). The inner cavity of the support shaft (3) is provided with an inlet pipe that is not connected to the inner cavity of the support shaft (3). A double-channel rotary joint (14) is rotatably connected to one end of the support shaft (3) away from the ball mill cylinder (1). One passage of the double-channel rotary joint (14) is connected to the inner cavity of the support shaft (3) and is connected to an outlet pipe. One end of the inlet pipe is connected to the inlet pipe through the other passage of the double-channel rotary joint (14), and the other end extends to the end of the ball mill cylinder (1) away from the support shaft (3) and is connected to the cooling water jacket (13). The air inlet (11) passes through the cooling water jacket (13) and is connected to the outside.

3. A dry ball mill according to claim 1, characterized in that: The feed hopper (7) and the vacuum discharge device are fixedly connected to the same horizontally movable support. The discharge pipe (9) is a ︿-shaped pipe. The air inlet (11) is provided with a filter plate (15). The filter plate (15) is provided with a number of conical filter holes (16). The conical filter holes (16) are larger at the end near the ball mill cylinder (1) and smaller at the end away from the ball mill cylinder (1). The ball separator and the second sealing cover are detachably installed on the impurity separation port (12) by bolts.

4. A dry ball mill according to claim 1, characterized in that: The rotating sealing plate (6) is fixedly sleeved on the outer wall of one end of the feed hopper (7) extending into the conical opening (2). A first annular groove is provided on the outer wall of the rotating sealing plate (6). A first O-ring (17) is installed in the first annular groove. The outer wall of the first O-ring (17) slides against the inner wall of the conical opening (2). A second O-ring (18) is provided on the outer wall of the rotating sealing plate (6) and on both sides of the first O-ring (17).

5. A dry ball mill according to claim 4, characterized in that: The second O-ring (18) is snapped onto the outer wall of the rotating sealing plate (6) by a snap-fit ​​post (19).

6. A dry ball mill according to claim 1, characterized in that: The lower surface of the first sealing cover (8) is provided with a first rubber sealing ring (20). The bottom of one end of the first sealing cover (8) is hinged to a telescopic rod (22) through a first hinge seat (21). The end of the telescopic rod (22) away from the first sealing cover (8) is hinged to the outer wall of the feed hopper (7) through a second hinge seat (23). The first sealing cover (8) is hinged to the feed hopper (7) through a third hinge seat (24). The telescopic rod (22) is an electric push rod or a hydraulic rod.

7. A dry ball mill according to claim 1, characterized in that: The vacuum discharge device includes a filter (25), the upper end of which is connected to a vacuum pump (26), one side of which is connected to a discharge pipe (9), and the discharge port (27) at the lower end of the filter (25) is connected to a material bucket (10) via a connector.

8. A dry ball mill according to claim 7, characterized in that: The connector includes a connecting tube (28) sleeved on the outer wall of the outlet (27), the connecting tube (28) being threaded to the outlet (27), a third O-ring (29) being provided on the inner wall of the connecting tube (28), and a second rubber sealing ring (30) being fixedly connected to the lower end of the connecting tube (28).

9. A dry ball mill according to claim 8, characterized in that: The outer wall of the discharge port (27) is a smooth surface or has a self-lubricating coating. A rotating ring is fixedly connected to the outer wall of the connecting pipe (28), and the outer wall of the rotating ring is an anti-slip surface.

10. A dry ball mill according to claim 8, characterized in that: The lower end of the connecting pipe (28) is provided with an external thread on the outer wall, and the top inlet of the material barrel (10) is provided with a corresponding internal thread on the inner wall.

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