Convenient discharge's silicon micro powder production uses ball mill

Abstract

The application discloses a ball mill for silicon powder production with convenient discharging, which comprises a front-end bin, a middle-end bin and a rear-end bin. The ball mill for silicon powder production with convenient discharging is characterized in that a plurality of middle-end bins are arranged adjacently, the front-end bin, the middle-end bin and the rear-end bin are concentrically arranged and are compatible with each other, a plurality of middle-end bins are arranged, a first connecting flange is arranged at the tail end of the front-end bin and the tail end of the middle-end bin, a second connecting flange is arranged at the front end of the middle-end bin and the front end of the rear-end bin, and the coaxial splicing and flexible disassembly of the multi-section bin body are realized by means of bolt penetration of the flanges, so that the number of the middle-end bins can be increased or reduced according to the production batch size to adjust the total volume of the cylinder body. The modular combination structure solves the problems of high idle rate of equipment and relatively high unit energy consumption caused by the fact that the traditional fixed-volume ball mill cannot adapt to multi-category and small-batch customized production, simultaneously avoids the increase of the production line investment cost caused by the purchase of another complete machine to adapt to the large-capacity demand, and significantly improves the production adaptability and flexibility.

Description

Technical Field

[0001] This invention relates to a ball mill, specifically a ball mill for producing silicon micro powder with convenient discharge. Background Technology

[0002] Silica powder, as a high-performance inorganic non-metallic functional filler, is widely used in electronic packaging, high-end building materials, specialty coatings, and photovoltaic new energy fields due to its high insulation, low thermal expansion, and chemical corrosion resistance. As downstream industries upgrade towards higher precision and customization, the market's requirements for the particle size uniformity, purity, and production flexibility of silica powder continue to increase. The grinding process, as the core link in silica powder production, directly determines product quality and production efficiency through the performance of its equipment.

[0003] Ball mills are the mainstream core equipment for dry grinding of silicon micron powder. Currently, the traditional ball mills widely used in the industry have two significant structural shortcomings that restrict the improvement of production efficiency and product quality. First, the cylinder volume is a fixed, integrated design, and the rated processing capacity cannot be flexibly adjusted according to the batch size and capacity requirements of production orders. When facing customized production tasks with small batches and multiple product categories, high idle rate and high unit energy consumption are likely to occur. If large-capacity demands are met, additional equipment is required, significantly increasing production line investment costs, resulting in insufficient production adaptability and flexibility.

[0004] Secondly, the discharge end generally adopts a single-layer single-grate structure, with uniform grate hole shape and size. The ultrafine powder particles generated during the silicon micron powder grinding process are prone to adhering to and clogging the inside of the grate holes, directly leading to increased discharge resistance, material retention inside the mill, reduced grinding efficiency, and disruption of product particle size distribution stability. At the same time, grate cleaning and maintenance require frequent machine shutdowns, increasing labor costs and production interruption losses.

[0005] Therefore, a ball mill for silicon micropowder production with convenient material discharge is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a ball mill for producing silicon micropowder that facilitates material discharge, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A ball mill for producing silicon micropowder with convenient discharge includes a front chamber, a middle chamber, and a rear chamber. Multiple middle chambers are arranged adjacent to each other. The front, middle, and rear chambers are concentrically arranged and compatible. The front, middle, and rear chambers are arranged sequentially. A first connecting flange is fixedly connected to the tail end of both the front and middle chambers. A second connecting flange is fixedly connected to the front end of both the middle and rear chambers. The second connecting flanges are compatible with the first connecting flanges and are fixedly installed by a first bolt. Through holes are formed on the circumference of both the first and second connecting flanges for the first bolt to pass through. The flange is threaded with a nut. The front end of the front chamber is fixedly connected to a feed pipe that communicates with it. The feed pipe is concentric with the front chamber and rotatably connected to the first support. The rear end of the rear chamber is fixedly connected to a rotating shaft that is concentric with it and rotatably connected to the second support. The inner walls of the front and middle chambers are fixedly connected with grinding plates. Grinding balls are provided in both the front and middle chambers. The rear chamber has a discharge port. Grate plates are provided between the front and middle chambers, between two adjacent middle chambers, and between the middle and rear chambers. The first connecting flange has a groove for placing the grate plates. The mesh size of the grate holes on the grate plates increases sequentially.

[0008] As a further aspect of the present invention: a motor is fixedly connected to the first support base, a first synchronous pulley is fixedly connected to the output end of the motor, a second synchronous pulley is fixedly connected to the front end, and the second synchronous pulley and the first synchronous pulley are connected by a synchronous belt drive.

[0009] As a further embodiment of the present invention: the front end of the feed pipe is rotatably connected to a hopper adapted thereto, the hopper is fixedly connected to the first support base, and a spiral blade is fixedly connected inside the feed pipe, with the spiral blade inserted into the hopper.

[0010] As a further embodiment of the present invention: the top of the hopper is covered with a cover plate adapted to it, a one-way vent valve is fixedly installed on the cover plate, one side of the cover plate is hinged to the hopper, and the other side of the cover plate is fixedly connected to a pressure lug.

[0011] As a further embodiment of the present invention: the clamping ear is provided in the shape of an open slot, a threaded sleeve is pressed on the clamping ear, a rotating handle is fixedly connected to the outside of the threaded sleeve, a threaded rod is threadedly connected to the inside of the threaded sleeve, and the threaded rod is hinged to the hopper.

[0012] As a further embodiment of the present invention: a discharge chamber adapted to the rear end chamber is provided on the outside of the discharge port, the discharge chamber is rotatably connected to the rear end chamber, a discharge pipe is fixedly connected to the discharge chamber, and the discharge chamber is fixedly connected to the second support base.

[0013] As a further embodiment of the present invention: a rotating support base is provided below each of the intermediate compartments, and a support wheel is circumferentially connected to the rotating support base. A support ring adapted to the support wheel is fitted on the outer wall of the intermediate compartment. The support ring is supported on the support wheel and is adapted to the support wheel. The support ring is fixedly installed to the intermediate compartment by a second bolt. The second bolt passes through the support ring and is fixedly installed to the intermediate compartment. A threaded hole for threaded connection of the second bolt is opened on the intermediate compartment, and a countersunk hole for installation of the second bolt is opened on the support ring.

[0014] As a further embodiment of the present invention: the support ring is composed of two half-rings, the two ends of the half-rings are fixedly installed by a third bolt, the third bolt passes through the half-ring and is threadedly connected to a nut, and the half-rings are provided with countersunk holes for the installation of the third bolt.

[0015] As a further embodiment of the present invention: the rotating support, the first support and the second support are spaced at equal intervals, and a support base plate is provided below the rotating support, the first support and the second support. Opening slots are provided at equal intervals on the support base plate. Inserts are fixedly connected to the bottom surfaces of the rotating support, the first support and the second support, and the inserts are inserted into the opening slots and are compatible with each other.

[0016] As a further embodiment of the present invention: a positioning stop is also assembled on the support base plate. The positioning stop is fixedly installed to the support base plate by a fourth bolt. After the fourth bolt passes through the positioning stop, it is threadedly connected to the support base plate. The support base plate is provided with a threaded hole for the threaded connection of the fourth bolt. The positioning stop is provided with a countersunk hole for the fourth bolt to pass through. The positioning stop fits against the rotating support, the first support and the second support, and the end of the opening slot is flush with the slot.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention sets up multiple intermediate chambers, with first connecting flanges at the tail ends of the front and intermediate chambers, and second connecting flanges at the front ends of the intermediate and rear chambers. Bolts are used to pass through the flanges to achieve coaxial splicing and flexible disassembly of the multiple chamber sections. This allows the number of intermediate chambers to be increased or decreased according to the production batch size to adjust the total volume of the cylinder. This modular combination structure solves the problem of high equipment idle rate and high unit energy consumption caused by the inability of traditional fixed volume ball mills to adapt to multi-category, small-batch customized production. At the same time, it avoids the increase in production line investment costs caused by purchasing additional complete machines to meet the needs of large production capacity, and significantly improves production adaptability and flexibility.

[0018] 2. This invention features grates between the front and middle silos, between adjacent middle silos, and between the middle and rear silos. The mesh size of the grates increases progressively along the material conveying direction. During operation, only powder particles smaller than the corresponding grate size are allowed to enter the next silo, while larger particles are blocked in the current silo for further grinding. This multi-stage gradient filtration structure effectively solves the problem of frequent clogging caused by concentrated adhesion of ultrafine powder in traditional single-layer single-grates filtration. It disperses the pressure of single-layer filtration and avoids increased discharge resistance. While ensuring product particle size uniformity and distribution stability, it reduces the frequency of downtime required for grate cleaning, thereby reducing labor maintenance costs and production interruption losses.

[0019] 3. This invention features a cover plate at the top of the hopper, with a one-way vent valve installed on the cover plate. The cover plate is sealed and locked to the hopper by a clamping mechanism consisting of a handle, a threaded sleeve, and a threaded rod. During operation, air is only drawn out of the hopper through the one-way vent valve. This sealed feed end structure solves the problem of dust escaping during negative pressure discharge and grinding processes in open feed ports. The one-way vent valve directionally balances the air pressure inside and outside the hopper, effectively reducing dust diffusion in the working environment while avoiding poor discharge due to negative pressure vacuum inside the hopper, thus ensuring continuous and stable discharge.

[0020] 4. This invention arranges the first support base, the second support base, and the rotating support base together on the support base plate, and supports the middle chamber on the support wheels arranged circumferentially on the top of the rotating support base through the support ring, forming a support system based on the support base plate and with multiple support points of each support base working together to bear the load; this multi-segment support structure effectively solves the problem of flexural deformation and swaying caused by the self-weight and rotational load of long-distance spliced ​​cylinders, ensuring the coaxiality and stability of the entire cylinder when rotating, thereby ensuring the smooth operation of the grinding operation.

[0021] 5. The support ring of the present invention is composed of two half-rings assembled on the outer wall of the middle compartment by a third bolt, and the support ring is then locked to the middle compartment by a second bolt. This combined fixing structure can achieve local quick replacement of worn parts by disassembling the second and third bolts after the outer surface of the support ring is worn due to long-term rolling contact, without disassembling or scrapping the middle compartment body, thereby reducing the maintenance cost of vulnerable parts and simplifying the maintenance operation procedure.

[0022] 6. The present invention provides insert strips on the bottom surfaces of the first support base, the second support base, and the rotating support base, and equally spaced matching opening slots on the support base plate. The insertion of the insert strips into the opening slots enables the rapid alignment of each support body on the base plate. Then, the positioning stop strips that fit against the sides of each support body are used in conjunction with the fourth bolt to achieve unified and centralized positioning. This insert-type positioning and fixing structure avoids the tedious operation of locking each anchor bolt to the hole, greatly improving the assembly and adjustment efficiency of multi-section support bodies. At the same time, the centralized constraint of the positioning stop strips also enhances the vibration resistance and anti-slip capability of each support body during the rotation of the cylinder. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a ball mill for producing silicon micropowder with convenient material discharge.

[0024] Figure 2 This is a perspective view of a ball mill for producing silicon micropowder that facilitates material discharge.

[0025] Figure 3 This is an enlarged view of component A in a ball mill used for the production of silicon micropowder, which facilitates material discharge.

[0026] Figure 4 This is a cross-sectional view of a ball mill used for the production of silicon micropowder, which facilitates material discharge.

[0027] Figure 5 This is a longitudinal sectional view of a ball mill for producing silicon micropowder with convenient material discharge.

[0028] Figure 6 This is a diagram illustrating the support substrate in a ball mill for producing silicon micropowder, designed for convenient material discharge.

[0029] Figure 7 This is a diagram showing the front-end hopper of a ball mill used for the production of silicon micropowder, which facilitates material discharge.

[0030] Figure 8 This is a diagram showing the mid-end hopper of a ball mill used for the production of silicon micropowder, which facilitates material discharge.

[0031] Figure 9 This is a diagram showing the rear end hopper of a ball mill used for the production of silicon micropowder, which facilitates material discharge.

[0032] Figure 10 This is a split diagram of the support ring in a ball mill for producing silicon micropowder with convenient material discharge.

[0033] Figure 11 This is a diagram illustrating the rotating support base in a ball mill used for the production of silicon micropowder, designed for convenient material discharge.

[0034] In the diagram: 1. Front-end bin; 2. Middle-end bin; 3. Rear-end bin; 4. First connecting flange; 5. Second connecting flange; 6. First bolt; 7. Feed pipe; 8. First support base; 9. Rotating shaft; 10. Second support base; 11. Inner grinding plate; 12. Grinding ball; 13. Discharge port; 14. Grate; 15. One-way vent valve; 16. Groove; 17. Motor; 18. First synchronous pulley; 19. Second synchronous pulley; 20. Hopper ; 21. Spiral blade; 22. Cover plate; 23. Pressing lug; 24. Threaded sleeve; 25. Rotary handle; 26. Threaded rod; 27. Discharge bin; 28. Discharge pipe; 29. ​​Rotary support base; 30. Support wheel; 31. Support ring; 32. Second bolt; 33. Half ring; 34. Third bolt; 35. Support base plate; 36. Opening slot; 37. Insert bar; 38. Positioning stop bar; 39. Fourth bolt; 40. Synchronous belt. Detailed Implementation

[0035] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation in the specification, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0038] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0039] Please see Figures 1-11In this embodiment of the invention, a ball mill for producing silicon micropowder with convenient discharge includes a front chamber 1, a middle chamber 2, and a rear chamber 3. Multiple middle chambers 2 are arranged adjacent to each other. The front chamber 1, middle chamber 2, and rear chamber 3 are concentrically arranged and compatible, and are arranged sequentially. A first connecting flange 4 is fixedly connected to the tail end of the front chamber 1 and the tail end of the middle chamber 2. A second connecting flange 5 is fixedly connected to the front end of the middle chamber 2 and the rear chamber 3. The second connecting flange 5 is compatible with the first connecting flange 4 and is fixedly installed by a first bolt 6. The first connecting flange 4 and the second connecting flange 5 have through holes on their circumferences for the first bolt 6 to pass through. The first bolt 6 passes through the first connecting flange 4 and the second connecting flange 5 and is threaded with a nut. A feed pipe 7 is fixedly connected to the front end of the front chamber 1 and communicates with it. The feed pipe 7 is concentrically arranged with the front chamber 1 and is rotatably connected to a first support base 8. The rear end of the rear compartment 3 is fixedly connected to a rotating shaft 9 concentrically arranged therewith, and the rotating shaft 9 is rotatably connected to the second support base 10. The inner walls of the front end compartment 1 and the middle end compartment 2 are both fixedly connected to inner grinding plates 11, and grinding balls 12 are provided in the front end compartment 1 and the middle end compartment 2. The rear end compartment 3 is provided with a discharge port 13. A grate plate 14 is provided between the front end compartment 1 and the middle end compartment 2, between two adjacent middle end compartments 2, and between the middle end compartment 2 and the rear end compartment 3. The first connecting flange 4 is provided with a groove 16 for placing the grate plate 14, and the mesh size of the grate plate 14 increases sequentially.

[0040] A motor 17 is fixedly connected to the first support base 8. A first synchronous pulley 18 is fixedly connected to the output end of the motor 17. A second synchronous pulley 19 is fixedly connected to the front end compartment 1. The second synchronous pulley 19 and the first synchronous pulley 18 are connected by a synchronous belt 40.

[0041] A hopper 20 is rotatably connected to the front end of the feed pipe 7, and the hopper 20 is fixedly connected to the first support base 8. A spiral blade 21 is fixedly connected inside the feed pipe 7, and the spiral blade 21 is inserted into the hopper 20.

[0042] The top of the hopper 20 is covered with a matching cover plate 22, and a one-way vent valve 15 is fixedly installed on the cover plate 22. One side of the cover plate 22 is hinged to the hopper 20, and the other side of the cover plate 22 is fixedly connected to a clamping lug 23.

[0043] The clamping ear 23 is an open slot-shaped setting, and a threaded sleeve 24 is pressed on the clamping ear 23. A rotating handle 25 is fixedly connected to the outside of the threaded sleeve 24, and a threaded rod 26 is threadedly connected to the inside of the threaded sleeve 24. The threaded rod 26 is hinged to the hopper 20.

[0044] A discharge chamber 27 adapted to the rear end chamber 3 is provided on the outer side of the discharge port 13. The discharge chamber 27 is rotatably connected to the rear end chamber 3. A discharge pipe 28 is fixedly connected to the discharge chamber 27, and the discharge chamber 27 is fixedly connected to the second support base 10.

[0045] Each intermediate compartment 2 is equipped with a rotating support base 29 at its lower part, and a support wheel 30 is circumferentially connected to the rotating support base 29. A matching support ring 31 is fitted onto the outer wall of the intermediate compartment 2, and the support ring 31 is supported on and matched with the support wheel 30. The support ring 31 is fixedly installed to the intermediate compartment 2 by a second bolt 32. The second bolt 32 passes through the support ring 31 and is fixedly installed to the intermediate compartment 2. The intermediate compartment 2 has a threaded hole for threaded connection of the second bolt 32, and the support ring 31 has a countersunk hole for mounting the second bolt 32.

[0046] The support ring 31 consists of two half-rings 33. The two ends of the half-rings 33 are fixedly installed by a third bolt 34. The third bolt 34 passes through the half-rings 33 and is threaded with a nut. The half-rings 33 are provided with countersunk holes for the installation of the third bolt 34.

[0047] The rotating support 29, the first support 8, and the second support 10 are spaced equally apart, and a support base plate 35 is provided below the rotating support 29, the first support 8, and the second support 10. Opening slots 36 are provided at equal intervals on the support base plate 35. Inserts 37 are fixedly connected to the bottom surfaces of the rotating support 29, the first support 8, and the second support 10, and the inserts 37 are inserted into and fitted into the opening slots 36.

[0048] A positioning stop 38 is also mounted on the support base plate 35. The positioning stop 38 is fixedly mounted to the support base plate 35 by a fourth bolt 39. After passing through the positioning stop 38, the fourth bolt 39 is threadedly connected to the support base plate 35. The support base plate 35 has a threaded hole for the threaded connection of the fourth bolt 39, and the positioning stop 38 has a countersunk hole for the fourth bolt 39 to pass through. The positioning stop 38 fits against the rotating support 29, the first support 8, and the second support 10, and the end face of the positioning stop 38 is flush with the end of the opening slot 36.

[0049] The working principle and usage process of this invention are as follows: When clamping and fixing the equipment, firstly, select the corresponding number of intermediate compartments 2 and rotating support seats 29 according to the production capacity requirements of the production batch. Place the first support seat 8, the selected number of rotating support seats 29 and the second support seat 10 sequentially on the support base plate 35, so that the insert strips 37 at the bottom of each seat are inserted into the equally spaced slots 36 on the support base plate 35, achieving initial alignment of each seat on the support base plate 35. Then, place the positioning stop strips 38 against the sides of the first support seat 8, each rotating support seat 29 and the second support seat 10, and screw the fourth bolt 39 through the countersunk hole on the positioning stop strip 38 into the threaded hole on the support base plate 35. Tighten the fourth bolt 39 to lock and fix the positioning stop strip 38, thereby axially and laterally limiting the first support seat 8, the rotating support seat 29 and the second support seat 10 on the support base plate 35, preventing the base from shifting during the rotation of the cylinder. Next, the cylinder support structure is assembled. For each intermediate compartment 2, two semi-rings 33 are fitted around the corresponding positions on the outer wall of the intermediate compartment 2. The third bolt 34 is passed through the countersunk holes at the ends of the two semi-rings 33 and threaded onto the nuts and tightened, so that the two semi-rings 33 are assembled into a complete support ring 31. Then, the second bolt 32 is passed through the countersunk hole on the support ring 31 and screwed into the threaded hole on the outer wall of the intermediate compartment 2, so that the support ring 31 is fixedly installed on the intermediate compartment 2. After assembly, the intermediate compartment 2 is supported by the support ring 31 on the support wheels 30 arranged circumferentially on the top of the rotating support base 29, and the support wheels 30 provide stable rotational support for the intermediate compartment 2. Finally, the multi-section cylinder is spliced. A grate 14 of the corresponding mesh size is placed in the groove 16 of the first connecting flange 4 at the tail end of the front chamber 1. After filling each chamber with grinding balls 12 of the corresponding specification, the second connecting flange 5 at the front end of the middle chamber 2 is aligned with the first connecting flange 4 at the tail end of the front chamber 1. The first bolt 6 is passed through the through holes on the first connecting flange 4 and the second connecting flange 5, and then the threaded nut is tightened. In this manner, the remaining middle chambers 2 are spliced ​​sequentially. Finally, the second connecting flange 5 at the front end of the rear chamber 3 is locked and fixed to the first connecting flange 4 at the tail end of the last middle chamber 2 using the first bolt 6, completing the coaxial splicing of the entire cylinder section. After splicing, the feed pipe 7 at the front end of the front chamber 1 is rotatably supported on the first support base 8, and the rotating shaft 9 at the tail end of the rear chamber 3 is rotatably supported on the second support base 10, forming a synchronously rotatable integral structure for the entire cylinder section.

[0050] During the preparation and height adjustment before installation, since the device achieves stable installation on the ground through the structure of the support base 35 and the support seat, no additional height adjustment steps are required. The entire device can be positioned by the insertion of the insert 37 and the opening slot 36.

[0051] When clamping the equipment and coarsely adjusting the X-axis position, after the assembly of the above-mentioned mechanical structure is completed, the X-axis positions of the rotating support 29, the first support 8 and the second support 10 in this device are determined by the insertion position of the insert 37 and the opening slot 36 and the locking limit of the positioning stop 38, thus realizing the precise positioning and fixation of each support on the support base plate 35.

[0052] When performing fine-tuning of the Y-axis position, the device ensures the positional accuracy of each support in the Y-axis by engaging the insert strip 37 at the bottom of each support with the opening slot 36 on the support base plate 35 in a single degree of freedom. The lateral contact of the positioning stop strip 38 further enhances the limiting stability in this direction.

[0053] During installation and operation, first connect the discharge pipe 28 to the bag filter collector via a negative pressure pipeline. To perform the feeding operation, rotate the handle 25. The handle 25 drives the threaded sleeve 24 to rotate on the threaded rod 26, causing the threaded sleeve 24 to unscrew upwards along the threaded rod 26, releasing the clamping limit on the pressure ear 23. Then, deflect the threaded rod 26 laterally around its hinge point with the hopper 20, completely disengaging the pressure ear 23 from the constraint of the threaded sleeve 24. This allows the cover plate 22 at the top of the hopper 20 to be opened around the hinge axis, allowing the silicon micropowder raw material to be fed into the hopper 20. After feeding, reverse the operation to close the cover plate 22, and tighten the threaded sleeve 24 using the handle 25 to clamp the pressure ear 23 for a secure seal. Start the motor 17, which drives the first synchronous pulley 18 to rotate. The first synchronous pulley 18 drives the second synchronous pulley 19 to rotate synchronously via the synchronous belt 40, thereby driving the front chamber 1 and the entire spliced ​​cylinder to rotate synchronously. During the rotation of the cylinder, the front chamber 1 drives the feed pipe 7 to rotate synchronously. The spiral blades 21 fixed inside the feed pipe 7 rotate together with it, and the raw materials in the hopper 20 are continuously transported to the front chamber 1 through the spiral pushing action, so as to achieve continuous and stable feeding. After the raw materials enter the front chamber 1, the grinding balls 12 in the front chamber 1 and each intermediate chamber 2 are continuously lifted and thrown down with the rotation of the cylinder. Together with the inner lining grinding plates 11 fixed on the inner wall of the chamber, they exert impact, compression and grinding action on the raw materials, and gradually crush and refine the raw materials. Since there are grates 14 between the front chamber 1 and the intermediate chamber 2, between two adjacent intermediate chambers 2, and between the intermediate chamber 2 and the rear chamber 3, and the mesh size of the grates 14 increases sequentially along the material conveying direction, only powder with a particle size smaller than the corresponding grate size can pass through the grates 14 to enter the next stage chamber. Large particles are blocked in the current chamber for further grinding. The multi-stage silo structure, with its progressively denser grates 14, forms a gradient-graded grinding structure, ensuring uniform particle size in the final output and preventing large particles from directly entering the discharge end and clogging the grates, thus improving grinding efficiency and smooth discharge. After grinding to the required standard, the silicon micropowder passes through the final grate 14 into the rear silo 3. Under negative pressure suction, the silicon micropowder in the rear silo 3 enters the discharge silo 27 through the discharge port 13, and is then continuously drawn out and collected through the discharge pipe 28, completing the discharge operation. The discharge silo 27 is rotatably connected to the rear silo 3 and fixed to the second support base 10, remaining fixed during the cylinder's rotation to ensure the continuity and sealing of the discharge process. During negative pressure discharge, a one-way vent valve 15 on the cover plate 22 replenishes outside air into the silo in one direction, balancing the pressure difference between the inside and outside of the silo, preventing the formation of a negative pressure vacuum that would increase discharge resistance, ensuring a stable and smooth discharge process, and preventing powder from overflowing from the feed end.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ball mill for producing silicon micro powder with convenient discharge, comprising a front chamber (1), a middle chamber (2), and a rear chamber (3), characterized in that: Multiple intermediate compartments (2) are arranged adjacent to each other. The front compartment (1), intermediate compartment (2), and rear compartment (3) are concentrically arranged and compatible. The front compartment (1), intermediate compartment (2), and rear compartment (3) are arranged sequentially. The tail end of the front compartment (1) and the tail end of the intermediate compartment (2) are both fixedly connected to a first connecting flange (4). The front end of the intermediate compartment (2) and the rear compartment (3) are both fixedly connected to a second connecting flange (5). The second connecting flange (5) and the first connecting flange (4) are compatible and fixedly installed by a first bolt (6). The first connecting flange (4) and the second connecting flange (5) have through holes on their circumference for the first bolt (6) to pass through. After the first bolt (6) passes through the first connecting flange (4) and the second connecting flange (5), a nut is threaded onto it. The front end of the front compartment (1) is fixedly connected to a connection that communicates with it. Feed pipe (7) is concentrically set with front end chamber (1). Feed pipe (7) is rotatably connected to first support base (8). The tail end of rear end chamber (3) is fixedly connected to a rotating shaft (9) concentrically set with it. Rotating shaft (9) is rotatably connected to second support base (10). The inner walls of front end chamber (1) and middle end chamber (2) are fixedly connected to inner grinding plates (11). Grinding balls (12) are provided in front end chamber (1) and middle end chamber (2). The rear end chamber (3) is provided with a discharge port (13). A grate plate (14) is provided between front end chamber (1) and middle end chamber (2), between two adjacent middle end chambers (2), and between middle end chamber (2) and rear end chamber (3). A groove (16) for placing the grate plate (14) is opened on the first connecting flange (4). The mesh number of the grate holes on the grate plate (14) increases sequentially.

2. The ball mill for producing silicon micropowder with convenient discharge as described in claim 1, characterized in that: A motor (17) is fixedly connected to the first support base (8), and a first synchronous pulley (18) is fixedly connected to the output end of the motor (17). A second synchronous pulley (19) is fixedly connected to the front end compartment (1). The second synchronous pulley (19) and the first synchronous pulley (18) are connected by a synchronous belt (40).

3. The ball mill for producing silicon micropowder with convenient discharge as described in claim 1, characterized in that: The front end of the feed pipe (7) is rotatably connected to a hopper (20) that is compatible with it. The hopper (20) is fixedly connected to the first support base (8). A spiral blade (21) is fixedly connected inside the feed pipe (7). The spiral blade (21) is inserted into the hopper (20).

4. The ball mill for producing silicon micropowder with convenient discharge as described in claim 3, characterized in that: The top of the hopper (20) is covered with a cover plate (22) that is compatible with it. A one-way vent valve (15) is fixedly installed on the cover plate (22). One side of the cover plate (22) is hinged to the hopper (20), and the other side of the cover plate (22) is fixedly connected with a pressure lug (23).

5. A ball mill for producing silicon micropowder with convenient discharge as described in claim 4, characterized in that: The clamping ear (23) is set in an open slot shape. A threaded sleeve (24) is pressed on the clamping ear (23). A rotating handle (25) is fixedly connected to the outside of the threaded sleeve (24). A threaded rod (26) is threadedly connected inside the threaded sleeve (24). The threaded rod (26) is hinged to the hopper (20).

6. A ball mill for producing silicon micropowder with convenient discharge according to claim 1, characterized in that: The outer side of the discharge port (13) is provided with a discharge chamber (27) that is compatible with the rear chamber (3). The discharge chamber (27) is rotatably connected to the rear chamber (3). The discharge pipe (28) is fixedly connected to the discharge chamber (27). The discharge chamber (27) is fixedly connected to the second support seat (10).

7. A ball mill for producing silicon micropowder with convenient discharge according to claim 1, characterized in that: Each of the intermediate compartments (2) is provided with a rotating support base (29) below. A support wheel (30) is circumferentially connected to the rotating support base (29). A support ring (31) is fitted on the outer wall of the intermediate compartment (2). The support ring (31) is supported on the support wheel (30) and is fitted. The support ring (31) is fixedly installed to the intermediate compartment (2) by a second bolt (32). The second bolt (32) passes through the support ring (31) and is fixedly installed to the intermediate compartment (2). A threaded hole for the threaded connection of the second bolt (32) is opened on the intermediate compartment (2). A countersunk hole for the installation of the second bolt (32) is opened on the support ring (31).

8. A ball mill for producing silicon micro powder with convenient discharge according to claim 7, characterized in that: The support ring (31) consists of two half rings (33). The two ends of the half rings (33) are fixedly installed by a third bolt (34). The third bolt (34) passes through the half ring (33) and is threaded with a nut. The half ring (33) is provided with a countersunk hole for the installation of the third bolt (34).

9. A ball mill for producing silicon micropowder with convenient discharge according to claim 7, characterized in that: The rotating support base (29), the first support base (8), and the second support base (10) are spaced at equal intervals. A support base plate (35) is provided below the rotating support base (29), the first support base (8), and the second support base (10). Opening slots (36) are provided at equal intervals on the support base plate (35). Inserts (37) are fixedly connected to the bottom surfaces of the rotating support base (29), the first support base (8), and the second support base (10). The inserts (37) are inserted into the opening slots (36) and are compatible.

10. A ball mill for producing silicon micropowder with convenient discharge according to claim 9, characterized in that: A positioning stop (38) is also assembled on the support base plate (35). The positioning stop (38) is fixedly installed on the support base plate (35) by a fourth bolt (39). After the fourth bolt (39) passes through the positioning stop (38), it is threadedly connected to the support base plate (35). The support base plate (35) has a threaded hole for the threaded connection of the fourth bolt (39). The positioning stop (38) has a countersunk hole for the fourth bolt (39) to pass through. The positioning stop (38) fits against the rotating support base (29), the first support base (8), and the second support base (10). The end of the opening slot (36) is flush with the slot.

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