Low-abrasion protection type high-purity silicon nitride ball mill and matched tail gas filtering and recycling device

Abstract

The invention relates to the technical field of ball mills, and discloses a low-wear protection type high-purity silicon nitride ball mill and a matched tail gas filtering and recycling device, the low-wear protection type high-purity silicon nitride ball mill comprises a base, a processing tank arranged on the base, and a driving part arranged on the base and the processing tank. According to the low-abrasion protection type high-purity silicon nitride ball mill and the matched tail gas filtering and recycling device, when the tank body rolls, grinding balls and materials can roll in the frame body and the grating, refined materials can fall to the bottom of the tank body, and when the tank body rolls, under the action of gravity, the refined materials rotate by a certain angle, and then the tail gas can be filtered and recycled. The coarse materials and the grinding balls can fall under the action of gravity, the coarse materials and the grinding balls are located in the frame body and the grating in the process, the device can separate the refined materials from the coarse materials and the grinding balls in the material grinding process, and the refined materials are prevented from being excessively ground.

Description

Technical Field

[0001] This invention relates to the field of ball mill technology, specifically to a low-wear protective high-purity silicon nitride ball mill and a matching exhaust gas filtration and recovery device. Background Technology

[0002] High-purity silicon nitride is a covalently bond-dominated ultra-hard ceramic material with excellent high-temperature stability, chemical inertness, and insulation properties. Free from impurities, it is a core high-end raw material for hot-end components in aero-engines and semiconductor wafer substrates, meeting the precision application requirements under harsh conditions. High-purity silicon nitride powder requires processing using a specialized ball mill to achieve uniform and refined particle size, enhancing sintering activity and providing crucial process support for the fabrication of dense, high-performance silicon nitride ceramic devices.

[0003] After the grinding balls and material are lifted by the ball mill cylinder, they fall under gravity. Through impact, the material is refined. The refined material mixes with the coarse material. The refined material is continuously impacted and squeezed by the grinding balls, resulting in over-grinding of the powder. At the same time, the refined material also affects the grinding of the coarse material. Therefore, a low-wear protective high-purity silicon nitride ball mill and a matching exhaust gas filtration and recovery device are proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a low-wear protective high-purity silicon nitride ball mill and a matching exhaust gas filtration and recovery device, which can separate the refined material from the coarse material and grinding balls during the material grinding process, thus solving the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-wear protective high-purity silicon nitride ball mill and a matching tail gas filtration and recovery device, comprising a base, a processing tank disposed on the base, a driving component disposed on the base and the processing tank, and a screening component disposed on the processing tank. The screening component comprises a frame, an inner ring of which is fixed with a grid, an outer ring of which is fixed with a filter screen, and a first feed port installed on the frame.

[0006] Furthermore, the base includes a steel frame, on which a bearing seat is provided, and a connecting plate is fixed to the bearing seat via a rotating cylinder.

[0007] With the above scheme, the bearing seats are symmetrically arranged at both ends of the steel frame, and the bearing seats are used to support the tank body through the rotating cylinder and connecting plate.

[0008] Furthermore, the processing tank includes a tank body, which is fixed to a connecting plate, and a second feed port is installed on the tank body.

[0009] With the above scheme, the tank can rotate on the upper bearing seat through the connecting plate and the rotating drum. The second material port is fixed to the tank by bolts. Specifically, for ease of use, the second material port can be fixed to the tank by a quick-release lock as used in existing technology.

[0010] Furthermore, the driving component includes a geared motor, which is fixed on a steel frame. A gear is fixed to the output end of the geared motor. The driving component also includes a gear ring, which is fixed to the circumferential side of the tank body. The gear meshes with the gear ring.

[0011] Through the above scheme, the power output of the geared motor is transmitted to the tank through gears and gear rings, driving the tank to rotate at a set speed, providing power for the rotation of grinding balls and materials.

[0012] Furthermore, the base also includes a discharge plate, which is fixed on the steel frame and extends to the bottom of the tank.

[0013] By rotating the second feed port downwards and opening it, the ground material will fall onto the discharge plate for easy subsequent processing.

[0014] The exhaust gas filtration and recovery device includes a cyclone dust collector. The cyclone dust collector includes a body, with a pipe connected to the top of the body and the other end of the pipe connected to a tank. A dust collection box is installed at the bottom of the body, and a fan is installed on the side of the body. The fan generates negative pressure to guide the exhaust gas in the tank into the body, and the body achieves gas-dust separation. The dust collection box collects the dust, thus achieving the functions of exhaust gas purification and material recovery.

[0015] Furthermore, the machine body includes a cylindrical body, a conical body, and a discharge valve. The cylindrical body is fixed on the conical body, the pipe extends into the cylindrical body, the discharge valve is installed at the bottom of the conical body, and the dust collection box is connected to the conical body.

[0016] With the above method, the dust rotates downward along the cylinder, and the rotational inertia generates centrifugal force. When it reaches the bottom, it separates the particulate matter in the gas. The dust enters the dust collection box through the discharge valve, and the filtered gas rotates upward and is discharged by the fan.

[0017] Furthermore, the aperture of the grid is larger than that of the filter screen, the grid is evenly distributed along the inner circle of the frame, and the filter screen completely covers the outer circle of the frame; during the material grinding process, the refined material that meets the particle size requirements passes through the grid and the filter screen in sequence and falls to the bottom of the tank, while the coarse material and grinding balls are confined within the space enclosed by the frame and the grid for continuous grinding, thereby realizing the real-time separation of refined material from coarse material and grinding balls.

[0018] Furthermore, the gear and the gear ring are fully meshed, and the inner ring of the gear ring is welded and fixed to the circumferential side of the tank body; both ends of the rotating drum are respectively interference-fitted with the inner ring of the bearing seat, the middle section of the rotating drum is fixedly connected to the connecting plate, and the end of the connecting plate away from the rotating drum is bolted to the end face of the tank body. When the geared motor drives the gear to rotate, it drives the tank body to rotate smoothly around the axis of the rotating drum through the gear ring.

[0019] Furthermore, the end of the pipe furthest from the tank extends to below the central axis of the cylindrical body of the machine, and the connection between the pipe and the cylindrical body is sealed with a flange; the air inlet of the blower is connected to the side flange of the machine body, and the negative pressure generated by the blower guides the exhaust gas in the tank into the cylindrical body along the pipe; the inlet of the discharge valve is sealed and connected to the bottom of the cone, and the outlet of the discharge valve corresponds to the top opening of the dust collection box, and the separated dust falls into the dust collection box for collection through the discharge valve.

[0020] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: When the tank of this low-wear protective high-purity silicon nitride ball mill and its matching exhaust gas filtration and recovery device is rotating, the grinding balls and materials will roll within the frame and grid. The refined material will fall to the bottom of the tank. As the tank rotates, the refined material will fall off under the influence of gravity after rotating a certain angle. During the above process, the coarse material and grinding balls are located within the frame and grid. This device can separate the refined material from the coarse material and grinding balls during the grinding process, thus preventing the refined material from being over-ground. Attached Figure Description

[0021] Figure 1 This is a diagram illustrating the overall structure of this application; Figure 2 This is a structural diagram of the drive component of this application; Figure 3 This is a three-dimensional structural diagram of the frame and grid of this application; Figure 4 This is a front view of the frame and grid of this application.

[0022] In the picture: 1. Base; 101. Steel frame; 102. Bearing housing; 103. Connecting plate; 104. Discharge plate; 2. Screening components; 201. Frame; 202. Grating; 203. Filter screen; 204. First feed inlet; 3. Processing tank; 301. Tank body; 302. Second feed inlet; 4. Drive components; 401. Gear motor; 402. Gear; 403. Gear ring; 5. Cyclone dust collector; 501. Machine body; 502. Pipeline; 503. Fan; 504. Dust collection box. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Please see Figures 1 to 4 This embodiment discloses a low-wear protective high-purity silicon nitride ball mill and a matching exhaust gas filtration and recovery device, including a base 1. The base 1 includes a steel frame 101, on which a bearing seat 102 is mounted. The bearing seat 102 is fixed to a connecting plate 103 via a rotating cylinder. The bearing seats 102 are symmetrically arranged at both ends of the steel frame 101, and the bearing seats 102, through the rotating cylinder and the connecting plate 103, support the tank body 301. The base 1 also includes a discharge plate 104, which is fixed to the steel frame 101. The upper end of the discharge plate 104 extends to the bottom of the tank body 301. By rotating the second feed port 302 to a downward direction and then opening the second feed port 302, the ground material will fall onto the discharge plate 104 for subsequent processing.

[0025] Please see Figure 1 and Figure 2 It also includes a processing tank 3, which is set on the base 1. The processing tank 3 includes a tank body 301, which is fixed to the connecting plate 103. A second material port 302 is installed on the tank body 301. The tank body 301 can rotate on the upper bearing seat 102 through the rotating drum and the connecting plate 103. The second material port 302 is fixed to the tank body 301 by bolts. Specifically, for ease of use, the second material port 302 can be fixed to the tank body 301 by a quick-release lock in the prior art.

[0026] Please see Figure 1 and Figure 2 It also includes a drive component 4, which is mounted on the base 1 and the processing tank 3. The drive component 4 includes a geared motor 401, which is fixed on the steel frame 101. A gear 402 is fixed to the output end of the geared motor 401. The drive component 4 also includes a gear ring 403, which is fixed to the circumferential side of the tank body 301. The gear 402 meshes with the gear ring 403. The power output by the geared motor 401 is transmitted to the tank body 301 through the gear 402 and the gear ring 403, driving the tank body 301 to rotate at a set speed, thus providing power for the rotation of the grinding balls and materials.

[0027] Please see Figure 3 and Figure 4It also includes a screening component 2, which is set on the processing tank 3. The screening component 2 includes a frame 201, with a grid 202 fixed to the inner ring of the frame 201 and welded to the frame 201. A filter screen 203 is fixed to the outer ring of the frame 201 and is fixed to the frame 201 by bolts. A first material port 204 is installed on the frame 201 and is fixed to the frame 201 by bolts. For ease of use, the first material port 204 can also be fixed by a quick-release lock.

[0028] Please see Figure 1 The exhaust gas filtration and recovery device includes a cyclone dust collector 5, which is an existing device. The cyclone dust collector 5 includes a body 501, with a pipe 502 connected to the top of the body 501. The other end of the pipe 502 is connected to a tank 301. A dust collection box 504 is installed at the bottom of the body 501. A fan 503 is installed on the side of the body 501. The fan 503 generates negative pressure to guide the exhaust gas in the tank 301 into the body 501. The body 501 achieves gas-dust separation, and the dust collection box 504 collects the dust, thus achieving the functions of exhaust gas purification and material recovery.

[0029] The body 501 includes a cylindrical body, a conical body, and a discharge valve. The cylindrical body is fixed on the conical body. The pipe 502 extends into the cylindrical body. The discharge valve is installed at the bottom of the conical body. The dust collection box 504 is connected to the conical body. The dust rotates downward along the cylindrical body. The rotational inertia generates centrifugal force. When it reaches the bottom, it separates the particulate matter in the gas. The dust enters the dust collection box 504 through the discharge valve. The filtered gas rotates upward and is discharged by the fan 503.

[0030] In this invention, the aperture of the grid 202 is larger than that of the filter screen 203. The grid 202 is evenly distributed along the inner ring of the frame 201, and the filter screen 203 completely covers the outer ring of the frame 201. During the material grinding process, the refined material that meets the particle size requirements passes through the grid 202 and the filter screen 203 in sequence and falls to the bottom of the tank 301. The coarse material and the grinding balls are confined within the space enclosed by the frame 201 and the grid 202 and continue to grind, thereby realizing the real-time separation of refined material from coarse material and grinding balls.

[0031] In this invention, the gear 402 and the gear ring 403 are fully meshed, and the inner ring of the gear ring 403 is welded and fixed to the circumferential side of the tank body 301; both ends of the rotating drum are respectively interference-fitted with the inner ring of the bearing seat 102, the middle section of the rotating drum is fixedly connected to the connecting plate 103, and the end of the connecting plate 103 away from the rotating drum is bolted to the end face of the tank body 301. When the geared motor 401 drives the gear 402 to rotate, the gear ring 403 drives the tank body 301 to rotate smoothly around the axis of the rotating drum.

[0032] In this invention, the end of the pipe 502 away from the tank 301 extends to below the central axis of the cylindrical body of the machine body 501, and the connection between the pipe 502 and the cylindrical body is sealed by a flange; the air inlet of the fan 503 is connected to the side flange of the machine body 501, and the negative pressure generated by the operation of the fan 503 guides the exhaust gas in the tank 301 into the cylindrical body along the pipe 502; the inlet of the discharge valve is sealed and connected to the bottom of the cone, and the outlet of the discharge valve corresponds to the top opening of the dust collection box 504, and the separated dust falls into the dust collection box 504 for collection through the discharge valve.

[0033] The working principle of the above embodiment is as follows: Open the second feed port 302 and the first feed port 204, add the grinding balls and materials into the frame 201 and the grid 202, start the reduction motor 401, the reduction motor 401 will drive the gear 402 to rotate, the gear 402 meshes with the gear ring 403, which will drive the gear ring 403 to rotate, and the gear ring 403 will drive the tank 301, the frame 201, the grid 202, and the filter screen 203 to rotate.

[0034] When the tank 301 is rolling, the grinding balls and materials will roll inside the frame 201 and the grid 202. The refined material will fall to the bottom of the tank 301. When the tank 301 is rolling, the refined material will fall off under the action of gravity after rotating at a certain angle. During the above process, the coarse material and the grinding balls are located inside the frame 201 and the grid 202. This device can separate the refined material from the coarse material and the grinding balls during the grinding process, so as to avoid the refined material being over-grinded.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-wear protective high-purity silicon nitride ball mill, comprising a base (1), characterized in that: it further comprises a processing tank (3) arranged on the base (1); it further comprises a driving component (4) arranged on the base (1) and the processing tank (3); it further comprises a screening component (2) arranged on the processing tank (3); the screening component (2) comprises a frame (201), the inner ring of the frame (201) is fixed with a grid (202), the outer ring of the frame (201) is fixed with a filter screen (203), and the frame (201) is installed with a first material port (204). The base (1) comprises a steel frame (101), the steel frame (101) is provided with a bearing seat (102), and the bearing seat (102) is fixed with a connecting plate (103) through a rotating drum. The processing tank (3) comprises a tank body (301), the tank body (301) is fixed with the connecting plate (103), and the tank body (301) is installed with a second material port (302). The driving component (4) comprises a speed reducer motor (401), the speed reducer motor (401) is fixed on the steel frame (101), the output end of the speed reducer motor (401) is fixed with a gear (402), the driving component (4) further comprises a gear ring (403), the gear ring (403) is fixed on the circumferential side of the tank body (301), and the gear (402) is engaged with the gear ring (403). The base (1) further comprises a discharge plate (104), the discharge plate (104) is fixed on the steel frame (101), and the upper end of the discharge plate (104) extends below the tank body (301).

2. A low-wear protective high-purity silicon nitride ball mill according to claim 1, characterized in that: It comprises a cyclone dust collector (5), the cyclone dust collector (5) comprises a machine body (501), the top of the machine body (501) is communicated with a pipeline (502), the other end of the pipeline (502) is communicated with the tank body (301), the bottom of the machine body (501) is installed with a dust collection box (504), and the side of the machine body (501) is installed with a fan (503).

3. A low-wear protective high-purity silicon nitride ball mill according to claim 2, characterized in that: The machine body (501) comprises a cylindrical body, a conical body and a discharge valve, the cylindrical body is fixed on the conical body, the pipeline (502) extends into the cylindrical body, the discharge valve is installed at the bottom of the conical body, and the dust collection box (504) is connected with the conical body.

4. A low-wear protective high-purity silicon nitride ball mill according to claim 3, characterized in that: The aperture of the grid (202) is larger than that of the filter screen (203), the grid (202) is uniformly distributed along the inner ring of the frame (201), and the filter screen (203) completely covers the outer ring of the frame (201); during the grinding process of the material, the material meeting the particle size requirement after refinement falls through the grid (202) and the filter screen (203) to the bottom of the tank body (301) in sequence, and the coarse material and the grinding ball are continuously ground in the space surrounded by the frame (201) and the grid (202).

5. A low-wear protective high-purity silicon nitride ball mill according to claim 3, characterized in that: ​ 6. A tail gas filtration and recovery device for use with a low-wear protection type high purity silicon nitride ball mill as claimed in any one of claims 1 to 5, characterised in that: ​ 7. The exhaust gas filtering and recycling device according to claim 6, characterized in that: ​ 8. A low-wear protective high-purity silicon nitride ball mill according to claim 1, characterized in that ​ 9. A low-wear protective type high purity silicon nitride ball mill according to claim 4, characterized in that, The gear (402) and the gear ring (403) are full-tooth surface engagement, the inner ring of the gear ring (403) is welded and fixed with the circumferential side of the tank body (301); the both ends of the rotating drum are interference fit with the inner rings of the bearing seats (102) respectively, the middle section of the rotating drum is fixedly connected with the connecting plate (103), the end of the connecting plate (103) away from the rotating drum is bolted and fixed with the end face of the tank body (301), when the reduction motor (401) drives the gear (402) to rotate, the tank body (301) is driven by the gear ring (403) to rotate stably around the axis of the rotating drum.

10. The tail gas filtration and recovery apparatus of claim 7, wherein, The end of the pipeline (502) away from the tank body (301) extends to below the middle axis of the cylindrical body of the machine body (501), and the connection between the pipeline (502) and the cylindrical body is sealed by a flange; the air inlet end of the fan (503) is connected with the side flange of the machine body (501), and the negative pressure generated by the working fan (503) guides the tail gas in the tank body (301) to enter the cylindrical body along the pipeline (502); the inlet of the unloading valve is sealingly connected with the bottom of the conical body, and the outlet of the unloading valve corresponds to the top opening of the dust collecting box (504), and the separated dust falls into the dust collecting box (504) through the unloading valve for collection.

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