Ball mill for processing silicon carbide powder

Abstract

The utility model relates to a ball mill for processing silicon carbide powder, which comprises a rack, a ball mill assembly for grinding silicon carbide into powder is arranged at the top of the rack, and a discharging assembly capable of conveniently discharging the powder in the ball mill assembly is arranged at the discharging end of the ball mill assembly. The discharging assembly comprises a negative pressure fan fixed to the side face of the rack, the feeding end of the negative pressure fan is connected with an air opening, a filter screen is arranged in the air opening, and the discharging assembly further comprises a brush wheel which can make contact with the surface of the filter screen and scrape off particles on the filter screen. According to the principle of air flow, powder in the rotary drum is sucked into the collecting bag, shutdown during discharging of the ball mill is not needed, and the ball mill can conduct continuous production.

Description

Technical Field

[0001] This utility model relates to the field of ball mill technology, specifically a ball mill for processing silicon carbide powder. Background Technology

[0002] Silicon carbide (SiC), a typical covalent compound, possesses high hardness, high melting point, low coefficient of thermal expansion, and excellent chemical stability, making it widely used in abrasives, ceramic materials, semiconductor substrates, and refractory materials. With the increasing demands for particle size, purity, and morphology of silicon carbide powder from advanced ceramics, composite materials, and semiconductor industries, its fine processing technology has become a key factor restricting industrial development. Ball mills, as the core equipment for silicon carbide powder processing, achieve material pulverization through collision and friction between the grinding media and the material.

[0003] Existing ball mills grind silicon carbide into powder by feeding material into a rotating drum and having the grinding steel balls inside continuously collide with the silicon carbide as the drum rotates. However, after grinding, the machine must be stopped and the drum opened, and the powder must be removed manually or mechanically. During this process, residual material and steel balls need to be cleaned. Each operation is time-consuming, the equipment utilization rate is insufficient, and it cannot meet the needs of large-scale continuous production. Utility Model Content

[0004] The purpose of this invention is to provide a ball mill for processing silicon carbide powder. It utilizes the principle of air flow to draw the powder from inside the rotating drum into a collection bag, eliminating the need to stop the ball mill when discharging material, thus enabling continuous production.

[0005] To address the problems of existing technologies, this utility model provides a ball mill for processing silicon carbide powder, including a frame. A ball mill assembly for grinding silicon carbide into powder is provided on the top of the frame. The discharge end of the ball mill assembly is provided with a discharge component that can conveniently discharge the powder from the ball mill assembly. The discharge component includes a negative pressure fan fixed to the side of the frame. The inlet end of the negative pressure fan is connected to an air inlet, and a filter screen is provided inside the air inlet. The discharge component also includes a brush wheel that can contact the surface of the filter screen and scrape off the particles on the filter screen.

[0006] Preferably, the discharge assembly further includes a bracket fixed to the air vent and movably connected to the brush wheel, the brush wheel being able to rotate to scrape off the powder on the filter screen.

[0007] Preferably, the discharge end of the negative pressure fan is connected to a connecting pipe, a material tank is connected to the connecting pipe, a discharge port is connected to the bottom end of the material tank, a collection bag is fitted over the discharge port, and a clamping component for fixing the collection bag is also provided on the discharge port.

[0008] Preferably, the clamping assembly includes two telescopic drive members evenly distributed on the discharge port, and the output end of the telescopic drive member is connected to the clamping member.

[0009] Preferably, the cross-section of the clamping member is arc-shaped.

[0010] Preferably, the ball mill assembly includes a rotating drum disposed directly above the frame, the outer surface of the rotating drum is provided with a toothed ring, the air inlet extends into the interior of the rotating drum, the interior of the rotating drum is provided with a plurality of grinding steel balls for grinding, and the ball mill assembly also includes a drive mechanism for driving the ball mill assembly to rotate.

[0011] Preferably, the drive mechanism includes a reducer mounted on the top of the frame, the output end of the reducer is connected to a gear, the gear meshes with a gear ring, and the drive mechanism also includes a rotary drive component fixed on the top of the frame, the output end of the rotary drive component being connected to the input end of the reducer.

[0012] Preferably, the ball mill assembly further includes a feed inlet disposed at the feed end of the rotary drum for feeding silicon carbide into the rotary drum.

[0013] The advantages of this utility model compared to the prior art are:

[0014] 1. This application extends the air vent into the interior of the rotating drum and utilizes a negative pressure fan to generate continuous suction, causing airflow within the drum. This airflow carries the ground silicon carbide powder directly into the collection bag through the vent, achieving powder separation and collection. This design avoids the need to stop the machine to remove material, as required by traditional ball mills, allowing the equipment to maintain continuous operation and significantly improving production efficiency.

[0015] 2. To prevent large, incompletely ground particles from entering the collection system, this application adds a filter screen at the air outlet, with an aperture designed to allow only qualified powder to pass through. Simultaneously, by arranging a brush wheel on the windward side of the filter screen, the airflow drives the brush wheel to rotate continuously, achieving dynamic cleaning of the filter screen surface. This effectively avoids the risk of blockage caused by the accumulation of large particles, ensuring the long-term stable operation of the system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first three-dimensional structure of a ball mill for processing silicon carbide powder.

[0017] Figure 2 This is a schematic diagram of the second three-dimensional structure of a ball mill for silicon carbide powder processing.

[0018] Figure 3 This is a three-dimensional structural diagram of a ball mill component for processing silicon carbide powder.

[0019] Figure 4This is a first three-dimensional structural diagram of the discharge component of a ball mill for silicon carbide powder processing.

[0020] Figure 5 This is a schematic diagram of the second three-dimensional structure of the discharge component of a ball mill for silicon carbide powder processing.

[0021] Figure 6 It is a ball mill for silicon carbide powder processing. Figure 4 Enlarged structural diagram at point A in the middle.

[0022] Figure 7 It is a ball mill for silicon carbide powder processing. Figure 5 Enlarged structural diagram at point B.

[0023] The following are the labels in the diagram: 1. Frame; 2. Ball mill assembly; 21. Rotary drum; 211. Gear ring; 22. Reducer; 221. Rotary drive component; 222. Gear; 23. Feed inlet; 3. Discharge assembly; 31. Negative pressure fan; 311. Air outlet; 3111. Filter screen; 32. Brush wheel; 321. Support; 33. Connecting pipe; 34. Material tank; 341. Discharge port; 35. Clamping assembly; 351. Telescopic drive component; 3511. Clamping component. Detailed Implementation

[0024] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figures 1-7 As shown, this utility model provides a ball mill for processing silicon carbide powder, including a frame 1. A ball mill assembly 2 for grinding silicon carbide into powder is provided on the top of the frame 1. A discharge assembly 3 is provided at the discharge end of the ball mill assembly 2 to facilitate the discharge of powder from the ball mill assembly 2. The discharge assembly 3 includes a negative pressure fan 31 fixed to the side of the frame 1. The feed end of the negative pressure fan 31 is connected to an air inlet 311, and a filter screen 3111 is provided inside the air inlet 311. The discharge assembly 3 also includes a brush wheel 32 that can contact the surface of the filter screen 3111 and scrape off the particles on the filter screen 3111. The brush wheel 32 can rotate to scrape off any particles that may be attached to the filter screen 3111, preventing the filter screen 3111 from clogging and ensuring that the negative pressure fan 31 can continuously and effectively suck out the powder, maintaining smooth discharge. The function of filter screen 3111 is to filter powder and prevent larger particles or impurities from being sucked into the negative pressure fan 31 when it is working, thus protecting the normal operation of the negative pressure fan 31 and ensuring that the particle size of the discharged powder meets the requirements.

[0026] When the ball mill for silicon carbide powder processing is in operation, the silicon carbide raw material is first placed into the ball mill assembly 2. The ball mill assembly 2 starts operating, and the silicon carbide is ground into powder by the internal grinding media (such as steel balls). Simultaneously with the grinding in the ball mill assembly 2, the negative pressure fan 31 in the discharge assembly 3 starts, generating negative pressure at the air inlet 311. Under the action of negative pressure, the ground silicon carbide powder in the ball mill assembly 2 is drawn into the air inlet 311. At this time, the filter screen 3111 inside the air inlet 311 filters the drawn-in powder, blocking larger particles or impurities from passing through. Only powder that meets the particle size requirements can pass through the filter screen 3111 and enter the negative pressure fan 31, and finally be discharged from the negative pressure fan 31, completing the powder collection.

[0027] The discharge assembly 3 also includes a bracket 321 fixed to the air outlet 311 and movably connected to the brush wheel 32. The brush wheel 32 can rotate to scrape off the powder on the filter screen 3111. The discharge end of the negative pressure fan 31 is connected to a connecting pipe 33, and a material tank 34 is connected to the connecting pipe 33. The bottom end of the material tank 34 is connected to a discharge port 341. A collection bag is fitted over the discharge port 341, and a clamping assembly 35 is also provided on the discharge port 341 to fix the collection bag.

[0028] The powder discharged by the negative pressure fan 31 enters the material tank 34 through the connecting pipe 33, where it undergoes buffering and sedimentation. A collection bag is then fitted over the discharge port 341 at the bottom of the material tank 34 and secured firmly using the clamping assembly 35. The discharge port 341 is then opened, allowing the powder to exit and enter the collection bag, completing the collection process of the silicon carbide powder.

[0029] The clamping assembly 35 includes two telescopic drive members 351 evenly distributed on the discharge port 341, and the output end of the telescopic drive member 351 is connected to the clamping member 3511. The clamping member 3511 has an arc-shaped cross-section.

[0030] The clamping member 3511 has an arc-shaped cross-section. This arc design better conforms to the shape of the discharge port 341 and the shape of the collection bag, increasing the contact area during clamping and improving clamping stability and sealing. When the telescopic drive member 351 drives the clamping member 3511 to move towards the center of the discharge port 341, the clamping member 3511 tightly clamps the collection bag fitted outside the discharge port 341, preventing the collection bag from falling off or leaking powder during powder discharge.

[0031] The ball mill assembly 2 includes a rotating drum 21 positioned directly above the frame 1. A gear ring 211 is also provided on the outer surface of the rotating drum 21. An air inlet 311 extends into the interior of the rotating drum 21. Several grinding steel balls for grinding are also provided inside the rotating drum 21. The ball mill assembly 2 also includes a drive mechanism for rotating the ball mill assembly 2. The drive mechanism includes a reducer 22 mounted on the top of the frame 1. A gear 222 is connected to the output end of the reducer 22, and the gear 222 meshes with the gear ring 211. The drive mechanism also includes a rotary drive component 221 fixed to the top of the frame 1, and the output end of the rotary drive component 221 is connected to the input end of the reducer 22. The ball mill assembly 2 also includes a feed inlet 23 located at the feed end of the rotating drum 21 for feeding silicon carbide into the rotating drum 21.

[0032] Before starting the ball mill for silicon carbide powder processing, silicon carbide raw material is fed into the rotating drum 21 through the feed inlet 23. Grinding steel balls are pre-placed inside the drum 21. The rotary drive 221 is started, outputting power. After reduction and torque amplification by the reducer 22, the drive gear 222 rotates. Since the gear 222 meshes with the gear ring 211 on the outer surface of the rotating drum 21, the rotation of the gear 222 causes the rotating drum 21 to begin rotating. As the drum 21 rotates, the grinding steel balls inside continuously collide, rub, and squeeze with the silicon carbide raw material under the action of centrifugal force and their own gravity, grinding the silicon carbide raw material. With the continuous rotation of the drum 21, the silicon carbide raw material is gradually ground into powder.

[0033] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A ball mill for processing silicon carbide powder, characterized in that: The assembly includes a frame (1), on the top of which is a ball mill assembly (2) for grinding silicon carbide into powder. The discharge end of the ball mill assembly (2) is provided with a discharge assembly (3) that can conveniently discharge the powder in the ball mill assembly (2). The discharge assembly (3) includes a negative pressure fan (31) fixed to the side of the frame (1). The feed end of the negative pressure fan (31) is connected to an air inlet (311), and a filter screen (3111) is provided inside the air inlet (311). The discharge assembly (3) also includes a brush wheel (32) that can contact the surface of the filter screen (3111) and scrape off the particles on the filter screen (3111).

2. The ball mill for silicon carbide powder processing according to claim 1, characterized in that: The discharge assembly (3) also includes a bracket (321) fixed on the air vent (311) and movably connected to the brush wheel (32), which can rotate to scrape off the powder on the filter screen (3111).

3. The ball mill for silicon carbide powder processing according to claim 1, characterized in that: The negative pressure fan (31) is connected to a connecting pipe (33) at its discharge end. A material tank (34) is connected to the connecting pipe (33). The bottom end of the material tank (34) is connected to a discharge port (341). A collection bag is fitted around the discharge port (341). A clamping component (35) that can fix the collection bag is also provided on the discharge port (341).

4. A ball mill for silicon carbide powder processing according to claim 3, characterized in that: The clamping assembly (35) includes two telescopic drive members (351) evenly distributed on the discharge port (341), and the output end of the telescopic drive member (351) is connected to the clamping member (3511).

5. A ball mill for silicon carbide powder processing according to claim 4, characterized in that: The clamping member (3511) has an arc-shaped cross-section.

6. A ball mill for silicon carbide powder processing according to claim 1, characterized in that: The ball mill assembly (2) includes a rotating drum (21) positioned directly above the frame (1). The outer surface of the rotating drum (21) is also provided with a toothed ring (211). The air vent (311) extends into the interior of the rotating drum (21). The interior of the rotating drum (21) is also provided with a number of grinding steel balls for grinding. The ball mill assembly (2) also includes a drive mechanism for driving the ball mill assembly (2) to rotate.

7. A ball mill for silicon carbide powder processing according to claim 6, characterized in that: The drive mechanism includes a reducer (22) mounted on the top of the frame (1), the output end of the reducer (22) is connected to a gear (222), the gear (222) meshes with a gear ring (211), and the drive mechanism also includes a rotary drive (221) fixed on the top of the frame (1), the output end of the rotary drive (221) is connected to the input end of the reducer (22).

8. A ball mill for silicon carbide powder processing according to claim 6, characterized in that: The ball mill assembly (2) also includes a feed inlet (23) disposed at the feed end of the rotary drum (21) for feeding silicon carbide into the rotary drum (21).

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