Silicon powder preparation device and preparation process thereof

Abstract

The application is suitable for the technical field of silicon powder production, and provides a silicon powder preparation device and a preparation process thereof, which comprises a shell, four supporting columns are symmetrically and fixedly connected to the lower side wall of the shell, a distribution table is arranged on the upper top wall of the shell, a plurality of material guide grooves are uniformly arranged on the outer wall of the distribution table, a plurality of discharge holes are arranged on the inner bottom wall of each material guide groove, a fixed rod is fixedly connected to the left inner wall of the shell, a rectangular shell is fixedly connected to the end of the fixed rod, guide rods that are in sliding connection with the inner wall of the shell are symmetrically and fixedly connected to the lower side wall of the distribution table, a rotating shaft one that extends to the outside is rotatably arranged in the rectangular shell, and the top end of the rotating shaft one is fixedly connected to the lower side wall of the distribution table. The device solves the problems of concentrated accumulation and single screening mode in the process of silicon powder feeding, achieves easy concentrated accumulation of silicon powder in the process of screening and feeding, thereby affecting the cooperation of silicon powder screening and three different screening modes, and improves the effect of silicon powder screening quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silicon powder production, and more particularly to a silicon powder preparation device and a preparation process thereof. BACKGROUND

[0002] Silicon powder, also known as micro-silicon powder, is a special collection and processing of smoke dust from the exhaust of industrial electric furnaces during the high-temperature smelting of industrial silicon and ferrosilicon. In the exhaust smoke dust, the SiO2 content accounts for about 90% of the total amount of smoke dust, and the particle size is very small, with an average particle size of almost nanometer level, so it is called silicon powder. The silicon powder needs to be screened during preparation. The current silicon powder screening equipment has the following deficiencies:

[0003] 1. During the screening and feeding process of silicon powder, the silicon powder is easily accumulated, which affects the screening effect of the silicon powder;

[0004] 2. The current silicon powder screening uses multiple screens of the same type for screening. The setting of multiple screens only changes the diameter of the screen holes, and the single screening method cannot improve the screening quality of the silicon powder. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a silicon powder preparation device and a preparation process thereof, which can uniformly disperse the silicon powder on the screen by using the cooperation of the setting of the distribution table, the guide chute, the discharge hole and the rotation of the distribution table, avoid the problem of concentrated accumulation of the silicon powder during feeding, and affect the screening effect, and the cooperation of three different screening methods improves the screening quality of the silicon powder.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A silicon powder preparation device, comprising a shell, the lower side wall of the shell is symmetrically fixedly connected with four supporting columns, the upper top wall of the shell is provided with a distribution table, the outer wall of the distribution table is uniformly provided with a plurality of guide chutes, the inner bottom wall of each guide chute is provided with a plurality of discharge holes, the left side inner wall of the shell is fixedly connected with a first fixed rod, the end of the first fixed rod is fixedly connected with a rectangular shell, and the lower side wall of the distribution table is symmetrically fixedly connected with guide rods which are slidingly connected with the inner wall of the shell.

[0008] The inside of the rectangular shell is rotationally provided with a rotating shaft I extending to the outside, the top end of the rotating shaft I is fixedly connected with the lower side wall of the material distribution table, a worm gear is fixedly sleeved on the outer wall of the rotating shaft I in the inside of the rectangular shell, a worm is rotationally connected to the right outer wall of the shell body and extends to the inside of the rectangular shell and is engaged with the worm gear, a sieve plate I is fixedly connected to the inner wall of the shell body and is located below the rectangular shell and is arranged outside the rotating shaft I, a sieve plate II is fixedly connected to the inner wall of the shell body and is located below the sieve plate I, and an agitating assembly is arranged on the outer wall of the rotating shaft I.

[0009] The outer wall of the agitating assembly is fixedly connected with a horizontal rod in a symmetrical manner, the lower outer wall of the horizontal rod is fixedly connected with a plurality of scraper plates in a symmetrical manner and in sliding contact with the sieve plate II, the inner wall of the shell body is fixedly connected with horizontal plates in a symmetrical manner and located below the sieve plate II, the lower side walls of the two horizontal plates are fixedly connected with springs, the end portions of the two springs are fixedly connected with a sieve plate III in sliding connection with the inner wall of the shell body, the right outer wall of the shell body is provided with a driving assembly, the bottom wall of the inner wall of the shell body is provided with a material guiding block, and the lower end of the material guiding block is fixedly inserted with a discharging pipe extending to the outside of the shell body.

[0010] The application is further provided that the lower side wall of the sieve plate III is fixedly connected with four vertical columns in a symmetrical manner, connecting rods are fixedly connected between adjacent vertical columns, the outer walls of two connecting rods located in the left-right direction are fixedly and jointly sleeved with a second fixing rod in sliding connection with the inner wall of the shell body, and the right end of the second fixing rod is fixedly connected with a mounting plate.

[0011] The application is further provided that the driving assembly comprises support rods fixedly connected to the outer wall of the shell body in a symmetrical manner, the end portions of the two support rods are fixedly connected with a motor, the driving end of the motor is fixedly connected with a rotating shaft II, the left end of the rotating shaft II is fixedly connected with a disc, a resisting rod is fixedly arranged at the left side wall of the disc away from the center, the right side wall of the mounting plate is fixedly connected with vertical rods in a symmetrical manner, the right ends of the two vertical rods are fixedly connected with a rectangular frame, the rectangular frame is slidingly sleeved on the outer wall of the resisting rod, the outer wall of the rotating shaft II is fixedly sleeved with a belt pulley I, the right end of the worm is fixedly connected with a belt pulley II, and the outer walls of the belt pulley I and the belt pulley II are jointly sleeved with a belt.

[0012] The application is further provided that the inner wall of the shell body is provided with an annular groove I matched with a guide rod, the outer wall of the shell body is provided with discharge ports matched with the sieve plate I in a symmetrical manner, and the sieve plate I is arranged in a conical manner.

[0013] The application is further provided that the right side wall of the shell body is fixedly connected with a guide plate, and the lower side wall of the rectangular frame is fixedly connected with a sliding rod penetrating through the guide plate.

[0014] The application is further provided that the inner wall of the shell body is provided with sliding grooves matched with the second fixing rod in a symmetrical manner.

[0015] The application is further provided with the feature that the outer wall of the shell is symmetrically provided with a through hole between the first sieve plate and the second sieve plate.

[0016] The application is further provided with the feature that the inner wall of the shell is provided with a second annular groove matching the third sieve plate, and the thickness of the second annular groove is greater than the thickness of the third sieve plate.

[0017] The application is further provided with a silicon powder preparation device and a preparation process, including the following steps:

[0018] SS01, first start the motor, the driving end of the motor drives the rotating shaft and the pulley one to rotate, and then drives the pulley two and the worm through the belt, so that the worm drives the meshed worm gear, rotating shaft one and the distribution table to rotate.

[0019] SS02, then put the silicon powder on the distribution table, the silicon powder will be evenly distributed on the first sieve plate along the guide chute and the discharge hole, the larger silicon powder particles flow out from the discharge port, and the smaller silicon powder particles flow to the second sieve plate.

[0020] SS03, at the same time, the rotating shaft one drives the cross rod and the scraper to rotate, so that the scraper continuously scrapes the silicon powder, so that the silicon powder is further screened, and the silicon powder under the second sieve plate needs to be connected to the suction pump for subsequent use, so that the suction pump extracts the silicon powder on the second sieve plate from the through hole.

[0021] SS04, the silicon powder flowing through the third sieve plate will be driven by the motor to rotate the rotating shaft two, the disc and the stop rod, the circular motion of the stop rod will decompose the motion in the horizontal direction and the vertical direction, in the horizontal direction, the stop rod will move along the inner wall of the rectangular frame, in the vertical direction, the stop rod drives the rectangular frame, the mounting plate, the second fixed rod and the third sieve plate to move upward, the up and down reciprocating movement of the third sieve plate cooperates with the use of the spring, so that the third sieve plate continuously shakes in the vertical direction, thereby completing the third rapid screening of the silicon powder.

[0022] SS05, finally, the fine silicon powder after screening will flow into the guide block and be discharged from the discharge pipe to the outside of the shell.

[0023] The application has the following advantages:

[0024] 1. By setting the distribution table, guide chute, discharge hole and the rotation of the distribution table, the silicon powder is evenly distributed on the first sieve plate, avoiding the problem of concentrated accumulation of silicon powder, which affects the screening effect.

[0025] 2. By using three different screening methods, the quality of the silicon powder screening is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1This is a three-dimensional structural diagram of the present invention.

[0027] Figure 2 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention.

[0028] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure in right-side cross-section.

[0029] Figure 4 for Figure 1 Enlarged view of point B in the middle.

[0030] Figure 5 This is a three-dimensional structural diagram of the connection between the material distribution platform, the material guide trough, and the material discharge hole in this invention.

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0032] Figure 7 This is a cross-sectional planar structural diagram of the connection between the rectangular shell, the rotating shaft, the worm gear, and the worm in this invention.

[0033] In the diagram: 1. Shell; 2. Support column; 3. First fixing rod; 4. Rectangular shell; 5. Guide rod; 6. Annular groove one; 7. Material distribution platform; 8. Material guide groove; 9. Discharge hole; 10. Rotating shaft one; 11. Worm gear; 12. Worm; 13. Screen plate one; 14. Discharge port; 15. Screen plate two; 16. Crossbar; 17. Scraper; 18. Screen plate three; 19. Horizontal plate; 20. Spring; 21. Annular groove two 22. Column; 23. Connecting rod; 24. Second fixing rod; 25. Slide groove; 26. Support rod; 27. Motor; 28. Mixing assembly; 29. ​​Disc; 30. Second rotating shaft; 31. Support rod; 32. Rectangular frame; 33. Column; 34. Mounting plate; 35. First pulley; 36. Guide plate; 37. Slide rod; 38. Through hole; 39. Second pulley; 40. Guide block; 41. Drive assembly. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] In the present application, the orientation such as "upper, lower" is generally directed to the direction shown in the drawings, or is directed to the vertical, perpendicular or gravity direction, unless otherwise stated; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component, but the above orientation words are not used to limit the present application.

[0037] Embodiment one

[0038] Please refer to Figures 1-7 The present application provides the following technical solutions:

[0039] Specifically refers to a kind of silicon powder preparation device, including shell 1, the lower side wall of shell 1 is symmetrically fixedly connected with four support columns 2, the upper top wall of shell 1 is provided with distribution table 7, the outer wall of distribution table 7 is uniformly provided with multiple guide slots 8, the inner bottom wall of each guide slot 8 is uniformly provided with multiple discharge holes 9, the left side inner wall of shell 1 is fixedly connected with first fixed rod 3, the end of first fixed rod 3 is fixedly connected with rectangular shell 4, the lower side wall of distribution table 7 is symmetrically fixedly connected with the guide rod 5 slidably connected with the inner wall of shell 1;The inside of rectangular shell 4 is rotatably provided with a shaft one 10 extending to the outside, the top end of shaft one 10 is fixedly connected with the lower side wall of distribution table 7, the outer wall of shaft one 10 located in the inside of rectangular shell 4 is fixedly sleeved with worm gear 11, the right outer wall of shell 1 is rotatably connected with worm 12 extending to the inside of rectangular shell 4 and meshing with worm gear 11, the inner wall of shell 1 is fixedly connected with sieve plate one 13 located below rectangular shell 4 and arranged outside shaft one 10, the inner wall of shell 1 is provided with annular groove one 6 matched with guide rod 5, the outer wall of shell 1 is symmetrically provided with discharge port 14 matched with sieve plate one 13, sieve plate one 13 is arranged in the form of a cone, the inner wall of shell 1 is fixedly connected with sieve plate two 15 located below sieve plate one 13, the outer wall of shell 1 is symmetrically provided with through hole 38 between sieve plate one 13 and sieve plate two 15, the outer wall of shaft one 10 is provided with stirring assembly 28;The outer wall of stirring assembly 28 is symmetrically fixedly connected with cross rod 16, the lower outer wall of cross rod 16 is symmetrically fixedly connected with multiple scraper plates 17 slidably contacting with sieve plate two 15, the inner wall of shell 1 is symmetrically fixedly connected with cross plate 19 located below sieve plate two 15, the lower side wall of two cross plates 19 is fixedly connected with spring 20, the end of two springs 20 is fixedly connected with sieve plate three 18 slidably connected with the inner wall of shell 1, the inner wall of shell 1 is provided with annular groove two 21 matched with sieve plate three 18, the thickness of annular groove two 21 is greater than the thickness of sieve plate three 18, the right outer wall of shell 1 is provided with driving assembly 41, the inner wall bottom wall of shell 1 is provided with guide block 40, the lower end of guide block 40 is fixedly inserted with discharge pipe extending to the outside of shell 1.

[0040] The specific application of the embodiment is: the silicon powder is put on the distribution table 7, the silicon powder is uniformly distributed on the sieve plate one 13 along the guide groove 8 and the discharge hole 9, the larger silicon powder particles flow out from the discharge port 14, the smaller silicon powder particles flow to the sieve plate two 15, the rotation of the worm 12 drives the worm wheel 11, the rotating shaft one 10 and the distribution table 7 to rotate, so that the silicon powder is uniformly distributed on the sieve plate one 13, the problem of concentrated accumulation of the silicon powder is avoided, and the screening effect is affected, the rotating shaft one 10 drives the cross rod 16 and the scraper 17 to rotate, so that the scraper 17 continuously scrapes the silicon powder, and the silicon powder is further screened, the silicon powder under the sieve plate two 15 needs to be connected to the suction pump in sequence, so that the suction pump extracts the silicon powder on the sieve plate two 15 from the through hole 38, and the silicon powder flows to the sieve plate three 18, so that the rectangular frame 32 drives the sieve plate three 18 to move up and down reciprocatingly, and the spring 20 is used to make the sieve plate three 18 continuously shake in the vertical direction, so that the silicon powder is screened for the third time, the efficiency of the silicon powder screening is improved, and the screening quality of the silicon powder is improved through the cooperation of the three different screening modes.

[0041] Embodiment two

[0042] Please refer to Figures 1-7 , the lower side wall of the sieve plate three 18 is symmetrically and fixedly connected with four stand columns 22, adjacent stand columns 22 are fixedly connected with connecting rods 23, the outer walls of the two connecting rods 23 in the left-right direction are commonly fixedly connected with a second fixed rod 24 which is slidably connected with the inner wall of the shell 1, the inner wall of the shell 1 is symmetrically provided with a sliding groove 25 matched with the second fixed rod 24, and the right end of the second fixed rod 24 is fixedly connected with a mounting plate 34.

[0043] One specific application of the embodiment is: after the mounting plate 34 is stressed, the second fixed rod 24, the connecting rod 23 and the stand column 22 are moved upwards or downwards, so that the second fixed rod 24 moves in the sliding groove 25.

[0044] Embodiment three

[0045] Please refer to Figures 1-7The third embodiment is improved based on the first embodiment, and specifically, the driving assembly 41 comprises support rods 26 fixedly connected to the outer wall of the shell 1 in a symmetrical mode, the end portions of the two support rods 26 are fixedly connected to a motor 27, the driving end of the motor 27 is fixedly connected to a rotating shaft two 30, the left end of the rotating shaft two 30 is fixedly connected to a disc 29, the left side wall of the disc 29 is fixedly connected to a resisting rod 31 at a position deviated from the center, the right side wall of the mounting plate 34 is fixedly connected to vertical rods 33 in a symmetrical mode, the right ends of the two vertical rods 33 are fixedly connected to a rectangular frame 32, the right side wall of the shell 1 is fixedly connected to a guide plate 36, the lower side wall of the rectangular frame 32 is fixedly connected to a sliding rod 37 penetrating through the guide plate 36, the rectangular frame 32 is slidingly sleeved on the outer wall of the resisting rod 31, the outer wall of the rotating shaft two 30 is fixedly sleeved with a belt pulley one 35, the right end of the worm 12 is fixedly connected to a belt pulley two 39, and the outer walls of the belt pulley one 35 and the belt pulley two 39 are fixedly sleeved with a belt.

[0046] One specific application of the embodiment is that the driving end of the motor 27 drives the rotating shaft two 30 and the belt pulley one 35 to rotate, and then drives the belt pulley two 39 and the worm 12 to rotate through the belt, the motor 27 drives the rotating shaft two 30, the disc 29 and the resisting rod 31 to rotate, the circumferential movement of the resisting rod 31 decomposes the movement in the horizontal direction and the vertical direction, in the horizontal direction, the resisting rod 31 moves along the inner wall of the rectangular frame 32, in the vertical direction, the resisting rod 31 drives the rectangular frame 32 to move upward or downward, and the reciprocating movement of the screen plate three 18 upward and downward provides power for the rotation of the worm 12 and the reciprocating movement of the rectangular frame 32 upward and downward.

[0047] The working principle of the application is as follows:

[0048] First start the motor 27, the drive end of the motor 27 drives the shaft two 30 and the pulley one 35 to rotate, and then drives the pulley two 39 and the worm 12 to rotate through the belt, so that the worm 12 drives the worm gear 11, the shaft one 10 and the distribution table 7 to rotate, at the same time, the silicon powder is put on the distribution table 7, the silicon powder will be evenly distributed on the sieve plate one 13 along the guide groove 8 and the discharge hole 9, the larger silicon powder particles flow out from the discharge port 14, and the smaller silicon powder particles flow to the sieve plate two 15, at the same time, the shaft one 10 drives the cross rod 16 and the scraper 17 to rotate, so that the scraper 17 continuously scrapes the silicon powder, so that the silicon powder is further sieved, the silicon powder under the sieve plate two 15 needs to be connected to the suction pump, so that the suction pump extracts the silicon powder on the sieve plate two 15 from the through hole 38, and then the silicon powder flowing to the sieve plate three 18 will be rotated by the motor 27 driving the shaft two 30, the disc 29 and the stop rod 31, the circular motion of the stop rod 31 will decompose the motion in the horizontal direction and the vertical direction, in the horizontal direction, the stop rod 31 will move along the inner wall of the rectangular frame 32, in the vertical direction, the stop rod 31 drives the rectangular frame 32, the mounting plate 34, the second fixed rod 24 and the sieve plate three 18 to move upward, the up and down reciprocating movement of the sieve plate three 18 cooperates with the use of the spring 20, so that the sieve plate three 18 continuously shakes in the vertical direction, so as to complete the third rapid screening of the silicon powder, and finally the screened fine silicon powder will flow into the guide block 40 and be discharged to the outside of the shell 1 from the discharge pipe.

[0049] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0050] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0051] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0052] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0053] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A silicon powder preparation apparatus, comprising a housing (1), characterized in that: The lower sidewall of the housing (1) is symmetrically fixedly connected with four support columns (2), the upper top wall of the housing (1) is provided with a material distribution platform (7), the outer wall of the material distribution platform (7) is evenly provided with multiple guide grooves (8), the inner bottom wall of each guide groove (8) is provided with multiple discharge holes (9), the left inner wall of the housing (1) is fixedly connected with a first fixing rod (3), the end of the first fixing rod (3) is fixedly connected with a rectangular shell (4), the lower sidewall of the material distribution platform (7) is symmetrically fixedly connected with guide rods (5) that are slidably connected to the inner wall of the housing (1); The rectangular shell (4) is rotatably provided with a rotating shaft (10) extending to the outside. The top of the rotating shaft (10) is fixedly connected to the lower side wall of the material distribution platform (7). The rotating shaft (10) is fixedly fitted with a worm gear (11) on the outer wall inside the rectangular shell (4). The right outer wall of the shell (1) is rotatably connected with a worm (12) extending into the rectangular shell (4) and meshing with the worm gear (11). The inner wall of the shell (1) is fixedly connected with a sieve plate (13) located below the rectangular shell (4) and outside the rotating shaft (10). The inner wall of the shell (1) is fixedly connected with a sieve plate (15) located below the sieve plate (13). The outer wall of the rotating shaft (10) is provided with a stirring assembly (28). The outer wall of the stirring assembly (28) is symmetrically fixed with a crossbar (16). The lower outer wall of the crossbar (16) is symmetrically fixed with a plurality of scrapers (17) that slide in contact with the second sieve plate (15). The inner wall of the shell (1) is symmetrically fixed with a horizontal plate (19) located below the second sieve plate (15). The lower side walls of the two horizontal plates (19) are fixedly connected with springs (20). The ends of the two springs (20) are fixedly connected with a third sieve plate (18) that slides in contact with the inner wall of the shell (1). The right outer wall of the shell (1) is provided with a driving assembly (41). The bottom wall of the inner wall of the shell (1) is provided with a guide block (40). The lower end of the guide block (40) is fixedly inserted with a discharge pipe extending to the outside of the shell (1).

2. The silicon powder preparation apparatus according to claim 1, characterized in that: Four columns (22) are symmetrically fixedly connected to the lower side wall of the sieve plate three (18). A connecting rod (23) is fixedly connected between adjacent columns (22). The outer walls of the two connecting rods (23) located in the left and right directions are jointly fixedly fitted with a second fixing rod (24) that is slidably connected to the inner wall of the shell (1). The right end of the second fixing rod (24) is fixedly connected to an installation plate (34).

3. The silicon powder preparation apparatus according to claim 2, characterized in that: The drive assembly (41) includes support rods (26) symmetrically fixedly connected to the outer wall of the housing (1). The ends of the two support rods (26) are fixedly connected to a motor (27). The drive end of the motor (27) is fixedly connected to a rotating shaft (30). The left end of the rotating shaft (30) is fixedly connected to a disc (29). The left side wall of the disc (29) is fixedly connected to a stop rod (31) off-center. The right side wall of the mounting plate (34) is symmetrically fixedly connected to a vertical rod (33). The right ends of the two vertical rods (33) are fixedly connected to a rectangular frame (32). The rectangular frame (32) is slidably sleeved on the outer wall of the stop rod (31). The outer wall of the rotating shaft (30) is fixedly sleeved with a pulley (35). The right end of the worm gear (12) is fixedly connected to a pulley (39). The outer walls of the pulley (35) and the pulley (39) are both sleeved with a belt.

4. The silicon powder preparation apparatus according to claim 3, characterized in that: The inner wall of the housing (1) is provided with an annular groove (6) that matches the guide rod (5), and the outer wall of the housing (1) is symmetrically provided with a discharge port (14) that matches the screen plate (13). The screen plate (13) is cone-shaped.

5. The silicon powder preparation apparatus according to claim 4, characterized in that: A guide plate (36) is fixedly connected to the right side wall of the housing (1), and a slide rod (37) that passes through the guide plate (36) is fixedly connected to the lower side wall of the rectangular frame (32).

6. The silicon powder preparation apparatus according to claim 5, characterized in that: The inner wall of the housing (1) is symmetrically provided with grooves (25) that match the second fixing rod (24).

7. The silicon powder preparation apparatus according to claim 6, characterized in that: The outer wall of the shell (1) is symmetrically provided with through holes (38) located between the first sieve plate (13) and the second sieve plate (15).

8. The silicon powder preparation apparatus according to claim 7, characterized in that: The inner wall of the housing (1) is provided with an annular groove (21) that matches the sieve plate (18), and the thickness of the annular groove (21) is greater than the thickness of the sieve plate (18).

9. A silicon powder preparation process using a silicon powder preparation apparatus according to any one of claims 1-8, characterized in that, Includes the following steps: SS01. First, start the motor (27). The drive end of the motor (27) drives the rotating shaft two (30) and the pulley one (35) to rotate. Then, the belt drives the pulley two (39) and the worm (12) to rotate, so that the worm (12) drives the worm wheel (11), the rotating shaft one (10) and the material distribution table (7) to rotate. SS02. Then, put the silicon powder onto the distribution table (7). The silicon powder will be evenly distributed on the first sieve plate (13) along the guide groove (8) and the discharge hole (9). Larger silicon powder particles flow out from the discharge port (14), and smaller silicon powder particles flow to the second sieve plate (15). SS03. At the same time, the rotating shaft (10) drives the crossbar (16) and scraper (17) to rotate, so that the scraper (17) continuously scrapes the silicon powder, so that the silicon powder is further screened. The silicon powder that does not flow to the bottom of the screen plate (15) needs to be connected to an external pump to extract the silicon powder on the screen plate (15) from the through hole (38). SS04. The silicon powder flowing through the sieve plate three (18) will be driven by the motor (27) to rotate the shaft two (30), the disc (29) and the push rod (31). The circular motion of the push rod (31) will be decomposed into horizontal and vertical motion. In the horizontal direction, the push rod (31) will move along the inner wall of the rectangular frame (32). In the vertical direction, the push rod (31) will drive the rectangular frame (32), the mounting plate (34), the second fixed rod (24) and the sieve plate three (18) to move up or down. The sieve plate three (18) moves up and down repeatedly. With the use of the spring (20), the sieve plate three (18) will shake continuously in the vertical direction, thereby completing the third rapid screening of silicon powder. SS05. The final screened high-quality silicon powder will flow into the feed block (40) and be discharged from the feed pipe to the outside of the shell (1).

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