A ball milling system

Abstract

The application provides a ball milling system, which comprises a fixed outer cylinder and a rotating inner cylinder coaxially arranged in the fixed outer cylinder, one end of the fixed outer cylinder is fixedly connected with a feeding hopper, a communication passage is arranged between the feeding hopper and the rotating inner cylinder to make the material in the feeding hopper enter the rotating inner cylinder, the lower wall of the end of the fixed outer cylinder away from the feeding hopper is fixedly connected with a discharging hopper, the rotating inner cylinder is provided with a discharging port which can intermittently communicate with the discharging hopper when the rotating inner cylinder rotates; the ball milling system further comprises at least two groups of annular partitions, the outer ring wall of each annular partition is fixedly connected with the inner wall of the rotating inner cylinder, and a plurality of notches are arranged on the annular partition; the ball milling system further comprises two air blowers respectively connected with the two ends of the fixed outer cylinder to supply high-speed airflow into the rotating inner cylinder, a wind collecting cover is fixedly connected with the upper wall of the fixed outer cylinder, and a first air vent is arranged on the rotating inner cylinder and surrounds the rotating inner cylinder. The application solves the problem that the rusted cast iron ball needs to be processed for multiple times when ball milling is performed, so that the efficiency cannot be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball milling equipment, in particular to a ball milling system. BACKGROUND

[0002] The ball mill is a device for grinding materials, such as grinding powder, grinding ball, and grinding pulp. When grinding hard and large particle materials, a dry grinding method is generally used. Specifically, the dry grinding ball milling equipment generally adopts a rotating cylinder structure, high chromium grinding balls are filled in the rotating cylinder as ball milling media, and then the material is introduced from one end of the rotating cylinder and the rotating cylinder is started to rotate. During the rotation, the high chromium grinding balls and the material roll with the rotation and collide and rub with each other, so that the surface of the material is processed to be smoother, and then it can be discharged from the other end. The dry grinding ball milling equipment can be used for ball milling and polishing of rusted cast iron balls, but the debris falling during the ball milling and polishing process cannot leave the ball milling system in time and is continuously processed with the cast iron balls. In order to achieve the purpose of ball milling and polishing, it is often necessary to carry out ball milling for several times, that is, the cast iron balls and debris are discharged for screening, and then the cast iron balls are introduced again for ball milling. This needs to be carried out at least twice, so that the overall efficiency cannot be improved. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application provides a ball milling system which solves the problem that the rusted cast iron balls need to be processed for several times in the prior art, resulting in low efficiency.

[0004] According to an embodiment of the present application, a ball milling system comprises a fixed outer cylinder and a rotating inner cylinder coaxially arranged in the fixed outer cylinder, one end of the fixed outer cylinder is fixedly connected with a feeding hopper, and a communication passage is arranged between the feeding hopper and the rotating inner cylinder to enable the material in the feeding hopper to enter the rotating inner cylinder, the lower wall of the end of the fixed outer cylinder away from the feeding hopper is fixedly connected with a discharging hopper, the rotating inner cylinder is provided with a discharging port, and the discharging port can intermittently communicate with the discharging hopper with the rotation of the rotating inner cylinder; at least two groups of annular partitions are further included, the outer ring wall of each annular partition is fixedly connected with the inner wall of the rotating inner cylinder, and a plurality of notches are arranged on the annular partition; two air blowers are further included and connected with the two ends of the fixed outer cylinder to supply high-speed airflow into the rotating inner cylinder, and a wind collecting cover is fixedly connected to the upper wall of the fixed outer cylinder, and a first ventilation hole is formed on the rotating inner cylinder and surrounds the rotating inner cylinder.

[0005] In the above embodiment, the material (i.e. the rusted cast iron ball) and the high-chromium iron ball are introduced into the rotating inner cylinder through the feeding hopper, and then the material and the high-chromium iron ball are ball-milled to achieve ball polishing as the rotating inner cylinder rotates. In the process, two air blowers are arranged to send high-speed airflow into the rotating inner cylinder from both ends, and the high-speed airflow carries the debris into the air collector through the first ventilation hole, and then leaves to separate from the cast iron ball in the rotating inner cylinder. Therefore, the polishing purpose can be achieved through one ball milling process, and the processing efficiency is improved. The problem that the rusted cast iron ball needs to be processed multiple times in the prior art, resulting in low efficiency, is solved.

[0006] Further, the slag receiving hopper is fixedly connected to the lower wall of the fixed outer cylinder, and all the first ventilation holes can intermittently communicate with the slag receiving hopper during the rotation of the rotating inner cylinder.

[0007] Further, the air extractor is further arranged in communication with the air collector.

[0008] Further, a plurality of magnetic adsorption rods are further arranged on the air collector, and all the magnetic adsorption rods are parallel to the axis of the rotating inner cylinder.

[0009] Further, a communication hole is arranged on the end face of the rotating inner cylinder close to the feeding hopper, and the communication passage includes a connecting hopper fixedly connected to the feeding hopper at one end and penetrating through the communication hole at the other end, and the connecting hopper is in communication with the space above the partition hole plate.

[0010] Further, the upper end and the lower end of the feeding hopper are open, and the partition hole plate is fixedly connected in the feeding hopper.

[0011] Further, a plurality of second ventilation holes are arranged on the end face of the rotating inner cylinder away from the feeding hopper.

[0012] Further, the driving motor is further fixedly arranged outside the fixed outer cylinder, the driving shaft is coaxially arranged in the rotating inner cylinder, one end of the driving shaft is rotatably extended outside the fixed outer cylinder and fixedly connected to the rotating shaft of the driving motor, and the inner wall of the annular partition plate is fixedly connected to the driving shaft through the connecting rod.

[0013] Further, the annular partition plate includes a first ring wall, a second ring wall and a third ring wall arranged from inside to outside and fixedly connected through the first connecting block, and the gap is formed between the adjacent two first connecting blocks.

[0014] Further, the outer wall of the annular partition plate is fixedly connected to the inner wall of the rotating inner cylinder through a plurality of second connecting blocks, and the gap is formed between the adjacent two second connecting blocks.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] During the ball milling process, two blowers are installed to send high-speed airflow into the rotating inner cylinder from both ends. The high-speed airflow carries debris into the air collection hood through the first ventilation hole and then leaves, thus separating it from the cast iron balls in the rotating inner cylinder. Therefore, the polishing purpose can be achieved in one ball milling process, which improves the processing efficiency and solves the problem that the existing technology requires multiple operations to ball mill rusted cast iron balls, resulting in no improvement in efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0019] Figure 3 for Figure 1 Enlarged schematic diagram of the local structure at point B;

[0020] Figure 4 This is a top view schematic diagram of the annular partition structure according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the elastic block structure according to an embodiment of the present invention;

[0022] In the above attached figures:

[0023] 1. Fixed outer cylinder, 2. Rotating inner cylinder, 3. Feed hopper, 4. Discharge hopper, 5. Discharge port, 6. Annular partition, 7. Notch, 8. Blower, 9. Air collector, 10. Exhaust fan, 11. Slag receiving hopper, 12. Magnetic adsorption rod, 13. Support part, 14. Elastic block, 15. Locking hole, 16. Connecting hopper, 17. Separating plate, 18. Drive motor, 19. Connecting rod, 20. First ring wall, 21. Second ring wall, 22. Third ring wall, 23. First connecting block, 24. Second connecting block, 25. Detailed Implementation

[0024] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] 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 do not 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.

[0026] like Figure 1 , 2 As shown in Figures 3, 4, and 5, this embodiment provides a ball milling system, which includes a fixed outer cylinder 1 and a rotating inner cylinder 2 rotatably disposed within the fixed outer cylinder 1 along a coaxial axis. A feed hopper 3 is fixedly connected to one end of the fixed outer cylinder 1, and a communication channel is provided between the feed hopper 3 and the rotating inner cylinder 2 to allow material from the feed hopper 3 to enter the rotating inner cylinder 2. A discharge hopper 4 is fixedly connected to the lower wall of the end of the fixed outer cylinder 1 facing away from the feed hopper 3. A discharge port 5 is provided on the rotating inner cylinder 2, and the discharge port 5 can intermittently communicate with the discharge hopper 4 as the rotating inner cylinder 2 rotates. The system also includes at least two sets of annular baffles 6, the outer ring wall of each annular baffle 6 being fixedly connected to the inner wall of the rotating inner cylinder 2, and several notches 7 being provided on the annular baffle 6. The system also includes two blowers 8 connected to both ends of the fixed outer cylinder 1 to supply high-speed airflow into the rotating inner cylinder 2. An air collecting hood 9 is fixedly connected to the upper wall of the fixed outer cylinder 1, and a first ventilation hole is opened on the rotating inner cylinder 2 surrounding it.

[0027] In the above embodiment, the material (i.e., rusty cast iron balls) and high-chromium iron balls are introduced into the rotating inner cylinder 2 through the feed hopper 3. Then, as the rotating inner cylinder 2 rotates, the material and the high-chromium iron balls are ball-milled for polishing. During the process, two blowers 8 are installed to send high-speed airflow into the rotating inner cylinder 2 from both ends. The high-speed airflow carries debris into the air collection hood 9 through the first ventilation hole and then leaves, thus separating it from the cast iron balls in the rotating inner cylinder 2. Therefore, the polishing purpose can be achieved in one ball milling process, which improves the processing efficiency and solves the problem that the existing technology requires multiple operations when ball-milling rusty cast iron balls, resulting in no improvement in efficiency.

[0028] Unlike existing technologies, this embodiment has a fixed outer cylinder 1 outside the rotating inner cylinder 2, which provides a direct mounting base for other components, such as the feed hopper 3 and the discharge hopper 4. During processing, the high-chromium iron balls and materials are moved inside the rotating inner cylinder 2 through the notch 7. During the rotation, the high-chromium iron balls and materials tumble, causing the debris on the material to fall off. Then, the debris moves upward to the air collecting hood 9 with the high-speed airflow sent by the blower 8. In order to make the high-speed airflow more capable of carrying debris, this embodiment also has an exhaust fan 10 connected to the air collecting hood 9 to guide the high-speed airflow and increase the power to make the debris enter the air collecting hood 9.

[0029] Furthermore, a slag hopper 11 is fixedly connected to the lower wall of the fixed outer cylinder 1, and all the first ventilation holes can intermittently communicate with the slag hopper 11 during the rotation of the inner cylinder 2. Some larger debris that cannot be drawn away by the high-speed airflow can enter the slag hopper 11 through the first ventilation holes and be separated from the material. In particular, the high-speed airflow and debris also enter the air collecting hood 9 through the first ventilation holes. When the blower 8 and the exhaust fan 10 are running at the same time, the high-speed airflow will not enter the slag hopper 11. The lower end of the slag hopper 11 is equipped with a door to close it, so external impurities will not be sucked into the system.

[0030] Preferably, the air collecting hood 9 is also equipped with several magnetic adsorption rods 12, and all the magnetic adsorption rods 12 are parallel to the axis of the rotating inner cylinder 2. This allows the air collecting hood 9 to adsorb debris (mainly iron filings), thereby reducing the amount of debris entering the exhaust fan 10. In particular, in this embodiment, both ends of the magnetic adsorption rods 12 are connected to the air collecting hood 9, thus ensuring their stable placement within the air collecting hood 9. Specifically:

[0031] A support portion 13 is recessed on one side of the inner wall of the air collecting hood 9, and an elastic block 14 is snapped onto the other side. The elastic block 14 is provided with multiple snap holes 15 for each magnetic adsorption rod 12 to snap onto. That is, all the magnetic adsorption rods 12 are snapped onto the elastic block 14, and then the elastic block 14 together with the magnetic adsorption rods 12 are snapped onto the air collecting hood 9. In this way, one end of the magnetic adsorption rod 12 is supported by the elastic block 14 and the other end is supported by the support portion 13, so that it can be stably placed inside the air collecting hood 9. The elastic block 14 can also seal the connection between it and the air collecting hood 9.

[0032] Preferably, a connecting hole 16 is provided on the end face of the rotating inner cylinder 2 near the feed hopper 3. The connecting channel includes a connecting bucket 17, one end of which is fixedly connected to the feed hopper 3 and the other end of which passes through the connecting hole 16. The connecting bucket 17 is connected to the feed hopper 3. In particular, the connecting hole 16 is set to be large so that the connecting bucket 17 does not come into contact with the rotating inner cylinder 2 during the rotation of the rotating inner cylinder 2 and thus does not collide. At the same time, the high-speed airflow sent by the blower 8 can enter the rotating inner cylinder 2. Furthermore, a number of second ventilation holes are provided on the end face of the rotating inner cylinder 2 away from the feed hopper 3. The second ventilation holes allow the high-speed airflow sent by another blower 8 to enter the rotating inner cylinder 2.

[0033] Preferably, the upper and lower ends of the feed hopper 3 are open and a partition plate 18 is fixedly connected inside it. The space above the connecting hopper 17 and the partition plate 18 is connected. When the material falls into the feed hopper 3 with the high-chromium iron ball, some debris will fall off. These debris can fall through the partition plate 18 and be separated below the feed hopper 3, thereby preventing these debris from entering the rotating inner cylinder 2 and increasing the load on the overall equipment operation.

[0034] Preferably, the ball mill system further includes a drive motor 19 fixedly mounted outside the fixed outer cylinder 1. A drive shaft is coaxially mounted inside the rotating inner cylinder 2, with one end of the drive shaft extending rotatably to the outside of the fixed outer cylinder 1 and fixedly connected to the rotating shaft of the drive motor 19. The inner ring wall of the annular partition 6 is fixedly connected to the drive shaft via a connecting rod 20. This allows the drive motor 19 to drive the annular partition 6 to rotate via the drive shaft, thereby achieving rotational drive of the rotating inner cylinder 2. The rotating inner cylinder 2 is divided into multiple tumbling sections by the annular partition 6, and the material and high-chromium iron balls undergo multiple tumbling cycles within the rotating inner cylinder 2. After ball milling and polishing, the material is discharged from the discharge port 5 at the end into the discharge hopper 4. In particular, the particle size of the high-chromium iron balls used is smaller than that of the material, while the particle size of the material is smaller than that of the set notch 7. In this embodiment, the ratio of high-chromium iron balls to material is 3:(1-2). More high-chromium iron balls enter together with the material during the ball milling process, so that the high-chromium iron balls enter and exit slowly with the material. That is, the high-chromium iron balls and the material enter together, and after all the material is discharged, the high-chromium iron balls are completely discharged, ensuring that the material is fully in contact with the high-chromium iron balls to achieve ball milling and polishing.

[0035] Preferably, the annular partition 6 includes a first annular wall 21, a second annular wall 22, and a third annular wall 23 arranged from the inside to the outside, and the three are fixedly connected by a first connecting block 24. A gap 7 is formed between two adjacent first connecting blocks 24. Further, the outer annular wall of the annular partition 6 is fixedly connected to the inner wall of the rotating inner cylinder 2 by a number of second connecting blocks 25 (i.e., the outer annular wall of the third annular wall 23). A gap 7 is formed between two adjacent second connecting blocks 25, so that the gap 7 is arranged on the annular surface of the entire annular partition 6, and the channel through which the high-chromium iron ball and material pass is more three-dimensional. At the same time, a similar channel is also provided between each connecting rod 20. Further, this also allows the drive shaft to be indirectly fixedly connected to the rotating inner cylinder 2.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A ball milling system, characterized in that, The system includes a fixed outer cylinder and a rotating inner cylinder rotatably mounted coaxially within the fixed outer cylinder. A feed hopper is fixedly connected to one end of the fixed outer cylinder, and a communication channel is provided between the feed hopper and the rotating inner cylinder to allow material from the feed hopper and high-chromium iron balls to enter the rotating inner cylinder. A discharge hopper is fixedly connected to the lower wall of the end of the fixed outer cylinder opposite to the feed hopper. A discharge port is provided on the rotating inner cylinder, and the discharge port can intermittently communicate with the discharge hopper as the rotating inner cylinder rotates. The system also includes at least two sets of annular baffles, each annular baffle having its outer ring wall fixedly connected to the inner wall of the rotating inner cylinder, and several notches on the annular baffles. Furthermore, the system includes two blowers connected to both ends of the fixed outer cylinder to supply high-speed airflow into the rotating inner cylinder. A wind collector is fixedly connected to the upper wall of the fixed outer cylinder, and a first ventilation hole is opened around the wind collector on the rotating inner cylinder. A communication hole is opened on the end face of the rotating inner cylinder near the feed hopper, and the communication channel includes a section fixedly connected to the feed hopper at one end. The other end passes through the connecting hole, and the connecting hopper is connected to the feeding hopper; the upper and lower ends of the feeding hopper are open and a partition plate is fixedly connected inside it, and the connecting hopper is connected to the space above the partition plate; it also includes a drive motor fixedly installed outside the fixed outer cylinder, and a drive shaft is set on the coaxial center line inside the rotating inner cylinder, and one end of the drive shaft extends to the outside of the fixed outer cylinder and is fixedly connected to the rotating shaft of the drive motor. The inner ring wall of the annular partition is fixedly connected to the drive shaft through a connecting rod. The annular partition includes a first ring wall, a second ring wall and a third ring wall arranged from the inside to the outside, and the three are fixedly connected by a first connecting block. A gap is formed between two adjacent first connecting blocks. The outer ring wall of the annular partition is fixedly connected to the inner wall of the rotating inner cylinder through several second connecting blocks. A gap is formed between two adjacent second connecting blocks; the particle size of the high-chromium iron balls is smaller than that of the material, the particle size of the material is smaller than the set gap, and the ratio of the number of high-chromium iron balls to the material is 3:(1-2).

2. The ball milling system as described in claim 1, characterized in that, A slag hopper is fixedly connected to the lower wall of the fixed outer cylinder, and all the first ventilation holes can intermittently communicate with the slag hopper as the inner cylinder rotates.

3. The ball milling system as described in claim 2, characterized in that, It also includes the exhaust fan connected to the air collection hood.

4. The ball milling system as described in claim 3, characterized in that, The air collecting hood is also equipped with several magnetic adsorption rods that can be pulled out, and all of the magnetic adsorption rods are parallel to the axis of the rotating inner cylinder.

5. The ball milling system as described in claim 1, characterized in that, Several second ventilation holes are provided on the end face of the rotating inner cylinder away from the feed hopper.

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