Collecting equipment for preparing high-purity silicon powder

Abstract

The collecting equipment comprises a shell, a magnetic suction cavity is formed in the shell, a material distributing barrel is arranged on the inner top wall of the magnetic suction cavity, a communicating channel is formed in the inner top wall of the magnetic suction cavity and communicates with an inner channel of the material distributing barrel, and the bottom of the inner channel of the material distributing barrel is expanded. By using the material collecting assembly, the material distributing plate is used for separating the cavity body of the material feeding cavity to generate a plurality of closed cavity bodies, so that the air pressure change generated in the raw material collecting procedure does not influence the inner cavity of the magnetic suction cavity, the air flow does not enter the material distributing barrel through the material feeding cavity, and the situation that the air flow is generated to blow the surface of the magnetic separation roller, so that adsorbed impurities fall off is avoided.

Description

Technical Field

[0001] The invention belongs to the field of high-purity silicon powder collection, and specifically relates to a collection device for preparing high-purity silicon powder. Background Art

[0002] The steps for preparing high-purity silicon powder include mechanically crushing natural quartz or quartzite to form raw material particles to expose internal impurities, facilitating the removal of pollutants such as metal oxides in subsequent purification processes. A magnetic separation device is required to remove residual trace metals and metal oxide impurities to improve the purity of the powder. The existing one has the characteristics of "simple and easy to maintain, and relatively strong versatility", but there are still some deficiencies. For example, its automation level is relatively low, and some steps need to be completed by manual intervention. The magnetic field generating mechanism is generally a permanent magnet, resulting in poor controllability of the magnetic field, making it difficult to flexibly control the release and removal of impurities. Therefore, a collection device for preparing high-purity silicon powder is proposed. Summary of the Invention

[0003] The purpose of this part is to outline some aspects of the embodiments of the invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the invention.

[0004] In view of the following technical problems in the prior art: the automation level is relatively low, some steps need to be completed by manual intervention, and the magnetic field generating mechanism is generally a permanent magnet, resulting in poor controllability of the magnetic field, making it difficult to flexibly control the release and removal of impurities.

[0005] To solve the above technical problems, the invention provides the following technical solution: A collection device for preparing high-purity silicon powder, including a housing. A magnetic attraction chamber is provided inside the housing. A material distribution cylinder is provided on the inner top wall of the magnetic attraction chamber. A communication channel is opened on the inner top wall of the magnetic attraction chamber, and the communication channel is connected to the internal channel of the material distribution cylinder. The bottom of the internal channel of the material distribution cylinder bulges. A magnetic separation roller is rotatably connected to the middle of the magnetic attraction chamber. The opening at the bottom end of the internal channel of the material distribution cylinder faces the magnetic separation roller. A baffle plate is rotatably connected to the top of one side of the magnetic attraction chamber. The bottom of the magnetic attraction chamber forms a material distribution chamber, an impurity separation chamber, and a water washing chamber. A magnetic field generating mechanism is provided inside the magnetic separation roller; the material distribution chamber and the impurity separation chamber are located below the magnetic separation roller. An aggregate component is provided at the top end of the housing. Another side of the magnetic attraction chamber is provided with a drying chamber.

[0006] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, the aggregate assembly includes a material suction table. One side of the material suction table is connected with a material suction disc through a feed pipe. An inlet cavity is recessed inside the material suction table. The top of one side of the inlet cavity is connected to the feed pipe. A filter screen is arranged at the top of the other side of the inlet cavity. The filter screen is connected to a connecting pipe. A material leakage hole is recessed at the bottom end of the inlet cavity. The material leakage hole is connected to a communication channel;

[0007] The cavity of the inlet cavity is separated by a material distribution plate to generate multiple closed cavities, so that the air pressure change generated in the process of collecting raw materials will not affect the inner cavity of the magnetic adsorption cavity, and the air flow will not reach the material distribution cylinder through the inlet cavity, avoiding the air flow blowing the surface of the magnetic separation roller and causing the adsorbed impurities to fall off.

[0008] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, a guide material bulge is arranged at the bottom of the internal channel of the material distribution cylinder. The guide material bulge has a structure that is convex upward and flat downward, similar to the shape of an airplane wing;

[0009] The raw material particles are deflected by the guide material bulge and fly, so that the raw material particles are dispersed in the enlarged part of the material distribution cylinder.

[0010] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, a material distribution arc plate is rotatably connected to the position of the internal channel of the material distribution cylinder below the guide material bulge. The material distribution arc plate is in a scimitar shape;

[0011] The material distribution arc plate shunts the flying raw material particles to make the raw material particles move towards a position farther away from the middle of the housing, so that the raw material particles are more evenly dispersed to the top of the outer ring of the magnetic separation roller, making the impurities in the raw material particles fully exposed and making the impurities in the raw material particles more fully contact with the outer ring of the magnetic separation roller, so as to be adsorbed by the magnetic separation roller, enabling the material distribution cylinder and the magnetic separation roller to process more raw material particles per unit time, thus greatly improving the working efficiency.

[0012] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, the water washing cavity is a space separated by a scraping plate one, a scraping plate two and a magnetic separation roller. The scraping plate one and the scraping plate two are both movably connected to the magnetic separation roller. The scraping plate one and the scraping plate two are both made of rubber;

[0013] The scraping plate two continues to scrape the surface of the magnetic separation roller and blocks the water liquid to prevent the water liquid from flowing out of the inner cavity of the water washing cavity through the gap between the scraping plate two and the magnetic separation roller.

[0014] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, a flushing nozzle is arranged at the top of the water washing cavity. The orientation of the flushing nozzle is tangent to the magnetic separation roller;

[0015] The magnetic separation roller continues to rotate to the corresponding position of the water washing chamber, and the flushing nozzle sprays out the aqueous solution to wash the surface of the magnetic separation roller, so as to wash away the impurities on the surface of the magnetic separation roller.

[0016] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, a jet head is arranged at the bottom end outside the material distribution cylinder, the orientation of the jet head is tangent to the magnetic separation roller, an air pipe is arranged on the jet head, and the air pipe extends out of the shell from inside the magnetic attraction cavity;

[0017] The air pipe is connected to an air pump.

[0018] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, a circulating water absorption wheel is rotatably connected to the top of the impurity separation cavity, and the circulating water absorption wheel is movably connected to the periphery of the magnetic separation roller;

[0019] The capillary water absorption rods on the circulating water absorption wheel absorb the aqueous solution, the water absorption cavity accommodates the aqueous solution, and the water absorption channel guides the aqueous solution to the circulating water absorption wheel for absorption. The flowing aqueous solution on the surface enters the material distribution cavity through the magnetic attraction layer along the outer ring of the magnetic separation roller, causing pollution.

[0020] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, an extrusion seat is arranged below the circulating water absorption wheel, the central shaft II is arranged in the middle of the circulating water absorption wheel, the circulating water absorption wheel is rotatably connected to the impurity separation cavity, the shape of the extrusion seat is "7" shaped, a drainage channel is recessed inside the extrusion seat, and the drainage channel runs up and down;

[0021] The extrusion seat extrudes the circulating water absorption wheel to release the aqueous solution, so that the circulating water absorption wheel has the ability to absorb the aqueous solution again, and the drainage channel drains away the infusion liquid.

[0022] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, a circle of capillary water absorption rods is arranged on the outer ring of the circulating water absorption wheel, and the capillary water absorption rods form a capillary water absorption layer. The capillary water absorption rods are mutually extruded with the circulating water absorption wheel. The material of the circulating water absorption wheel is sponge; the capillary water absorption rods are composed of fiber long hairs. An absorption cavity is arranged at the top of the capillary water absorption rod. A water absorption channel is arranged below the absorption cavity of the capillary water absorption rod. An oval cavity is arranged inside the water absorption channel. The top of the capillary water absorption rod is frustum-shaped;

[0023] The material of the magnetic attraction layer is ceramic or soft magnetic material. The connecting pipe is connected to an air suction pump, and the air suction pump generates suction force on the suction tray through the connecting pipe, the feeding cavity and the feeding pipe.

[0024] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, the top end of the air drying cavity corresponds to the scraping plate II.

[0025] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, one end of a connecting pipe is provided with a suction pump. An inner side of the material suction table is concavely provided with a feeding cavity. An inner side of the feeding cavity is rotatably connected with a first central shaft. Six distributing plates are annularly arrayed around the first central shaft. The distributing plates are fan-shaped. An outer ring of each distributing plate is provided with an elastic sealing frame, and the elastic sealing frame is made of rubber;

[0026] One end of the distributing plate away from the first central shaft is movably connected with an inner wall of the feeding cavity.

[0027] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, one end of an electromagnet is electrically connected with a first conductive ring, the other end of the electromagnet is electrically connected with a graphite head, the graphite head is slidably connected with a second conductive ring, the second conductive ring is connected with a power supply, and the first conductive ring is connected with the power supply.

[0028] As a preferred technical solution of a collecting device for preparing high-purity silicon powder, the magnetic field generating mechanism includes a magnetic attraction layer, a partition plate, a first magnetic shielding cylinder, a second magnetic shielding cylinder, a third central shaft, a graphite head, an electromagnet and a first conductive ring. Electromagnets are annularly arrayed inside the magnetic separation roller. The first magnetic shielding cylinders are annularly arrayed and distributed inside the magnetic separation roller. A plurality of magnetic attraction layers are evenly arrayed on an outer ring of the magnetic separation roller, and the magnetic attraction layers correspond to the electromagnets;

[0029] The second conductive ring is a circular ring with a notch, and the magnetic attraction layers are separated by the partition plate;

[0030] One end of the first magnetic shielding cylinder is connected with the second magnetic shielding cylinder. The second magnetic shielding cylinder and the first magnetic shielding cylinder form a cavity with a notch. Both the first magnetic shielding cylinder and the second magnetic shielding cylinder are made of shielding materials.

[0031] The beneficial effects of a collecting device for preparing high-purity silicon powder according to the present invention: By using the aggregate assembly, the feeding cavity is partitioned by the distributing plates to generate multiple closed cavities, so that the air pressure change generated in the process of collecting raw materials does not affect the inner cavity of the magnetic attraction cavity, and the air flow does not reach the inside of the distributing cylinder through the feeding cavity, avoiding the air flow blowing the surface of the magnetic separation roller and causing the adsorbed impurities to fall off;

[0032] The raw material particles flowing through the internal channel of the distributing cylinder are deflected by the guiding drum bulge and fly, so that the raw material particles are dispersed in the enlarged part of the distributing cylinder. The distributing arc plates shunt the flying raw material particles to make the raw material particles move to a position farther away from the middle of the housing, so that the raw material particles are more evenly dispersed to the top of the outer ring of the magnetic separation roller, making the impurities in the raw material particles fully exposed and making the impurities in the raw material particles more fully contact with the outer ring of the magnetic separation roller, so as to be adsorbed by the magnetic separation roller, enabling the distributing cylinder and the magnetic separation roller to process more raw material particles per unit time, thereby greatly improving the working efficiency;

[0033] By using the graphite head and the second conductive ring, the magnetic field generated by the electromagnet can be precisely controlled to adsorb impurities at specific positions or cancel the magnetic field at specific positions to release impurities. The magnetic separation roller regains its high-efficiency impurity absorption ability, and the entire process is highly automated. Brief Description of the Drawings

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0035] Figure 1 is the overall structural schematic diagram of the present invention;

[0036] Figure 2 is the internal structural schematic diagram of the material suction table of the present invention Figure 1 ;

[0037] Figure 3 is the internal structural schematic diagram of the material suction table of the present invention Figure 2 ;

[0038] Figure 4 is the internal structural schematic diagram of the circulating water suction wheel of the present invention;

[0039] Figure 5 is the internal structural schematic diagram of the capillary water suction rod of the present invention;

[0040] Figure 6 is for the present invention Figure 1 partial enlarged structural schematic diagram of part A therein;

[0041] Figure 7 is for the present invention Figure 1 partial enlarged structural schematic diagram of part B therein;

[0042] Figure 8 is for the present invention Figure 1 partial enlarged structural schematic diagram of part C therein;

[0043] Figure 9 is the connection structural schematic diagram of the second conductive ring and the graphite head of the present invention;

[0044] Figure 10 is the circuit structural schematic diagram of the graphite head of the present invention.

[0045] Reference numerals: 1, housing; 2, magnetic suction chamber; 3, material distribution chamber; 4, circulating water suction wheel; 5, impurity separation chamber; 6, water washing chamber; 7, scraping plate I; 8, scraping plate II; 9, air drying chamber; 10, magnetic separation roller; 11, material distribution cylinder; 12, material suction table; 13, feeding chamber; 14, central shaft I; 15, material distribution plate; 16, filter screen; 17, elastic sealing frame; 18, feeding pipe; 19, flushing nozzle; 20, air jet head; 21, connecting pipe; 22, capillary water absorption rod; 23, central shaft II; 24, communication channel; 25, water absorption chamber; 26, water absorption channel; 27, magnetic suction layer; 28, partition plate; 29, magnetic shielding cylinder I; 30, magnetic shielding cylinder II; 31, central shaft III; 32, graphite head; 33, graphite head; 34, material distribution arc plate; 35, material guiding bulge; 36, extrusion seat; 37, drainage channel; 38, material suction disc; 39, conductive ring I; 40, conductive ring II; 41, material blocking plate. Detailed implementation manners

[0046] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0047] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0048] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0049] Furthermore, the present invention will be described in detail in conjunction with the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0050] Such as Figures 1 to 8As shown in the figure, the present invention provides a collection device for preparing high-purity silicon powder, including a housing 1. Inside the housing 1, a magnetic adsorption chamber 2 is provided. On the inner top wall of the magnetic adsorption chamber 2, a material distribution cylinder 11 is arranged. On the inner top wall of the magnetic adsorption chamber 2, a communication channel 24 is opened, and the communication channel 24 is connected to the internal channel of the material distribution cylinder 11. The bottom of the internal channel of the material distribution cylinder 11 bulges. In the middle of the magnetic adsorption chamber 2, a magnetic separation roller 10 is rotatably connected. The opening at the bottom end of the internal channel of the material distribution cylinder 11 faces the magnetic separation roller 10. On the top of one side of the magnetic adsorption chamber 2, a baffle plate 41 is rotatably connected. The bottom of the magnetic adsorption chamber 2 forms a material distribution chamber 3, an impurity separation chamber 5, and a water washing chamber 6. Inside the magnetic separation roller 10, a magnetic field generating mechanism is provided; the material distribution chamber 3 and the impurity separation chamber 5 are located below the magnetic separation roller 10. At the top end of the housing 1, an aggregate collection assembly is provided. On the other side of the magnetic adsorption chamber 2, an air drying chamber 9 is provided.

[0051] The aggregate collection assembly includes a material suction table 12. On one side of the material suction table 12, a material suction disc 38 is connected through a feed pipe 18. Inside the material suction table 12, a feeding cavity 13 is recessed. At the top of one side of the feeding cavity 13, it is connected to the feed pipe 18. At the top of the other side of the feeding cavity 13, a filter screen 16 is provided. The filter screen 16 is connected to a connecting pipe 21. At the bottom end of the feeding cavity 13, a leakage hole is recessed, and the leakage hole is connected to the communication channel 24;

[0052] The feeding cavity 13 is divided by a material distribution plate 15 to generate multiple closed cavities, so that the air pressure change generated in the process of collecting raw materials will not affect the inner cavity of the magnetic adsorption chamber 2, and the air flow will not reach the inside of the material distribution cylinder 11 through the feeding cavity 13, avoiding the air flow blowing on the surface of the magnetic separation roller 10 and causing the adsorbed impurities to fall off.

[0053] At the bottom of the internal channel of the material distribution cylinder 11, a guiding drum bulge 35 is provided. The guiding drum bulge 35 has an upwardly convex and downwardly flat structure, similar to the shape of an airplane wing;

[0054] The raw material particles are deflected by the guiding drum bulge 35 and fly, so that the raw material particles are dispersed in the bulging part of the material distribution cylinder 11.

[0055] Inside the internal channel of the material distribution cylinder 11, at the position below the guiding drum bulge 35, a material distribution arc plate 34 is rotatably connected. The material distribution arc plate 34 is in a scimitar shape;

[0056] The material distribution arc plate 34 shunts the flying raw material particles to a position farther away from the middle of the housing 1, so that the raw material particles are more evenly dispersed on the top of the outer ring of the magnetic separation roller 10, making the impurities in the raw material particles fully exposed and the impurities in the raw material particles more fully contact with the outer ring of the magnetic separation roller 10, so as to be adsorbed by the magnetic separation roller 10, enabling the material distribution cylinder 11 and the magnetic separation roller 10 to process more raw material particles per unit time, thus greatly improving the working efficiency.

[0057] The water washing chamber 6 is a space separated by a first scraping plate 7, a second scraping plate 8 and a magnetic separation roller 10. Both the first scraping plate 7 and the second scraping plate 8 are movably connected to the magnetic separation roller 10, and both the first scraping plate 7 and the second scraping plate 8 are made of rubber;

[0058] The second scraping plate 8 continues to scrape the surface of the magnetic separation roller 10 and blocks the water liquid to prevent the water liquid from flowing out of the inner cavity of the water washing chamber 6 between the second scraping plate 8 and the magnetic separation roller 10.

[0059] A flushing nozzle 19 is arranged at the top of the water washing chamber 6, and the orientation of the flushing nozzle 19 is tangent to the magnetic separation roller 10;

[0060] The magnetic separation roller 10 continues to rotate to the corresponding position of the water washing chamber 6, and the flushing nozzle 19 sprays water liquid to wash the surface of the magnetic separation roller 10, so as to wash away the impurities on the surface of the magnetic separation roller 10.

[0061] An air jet head 20 is arranged at the bottom end outside the material distribution cylinder 11, the orientation of the air jet head 20 is tangent to the magnetic separation roller 10, an air pipe is arranged on the air jet head 20, and the air pipe extends out of the housing 1 from inside the magnetic attraction chamber 2;

[0062] The air pipe is connected to an air pump.

[0063] A circulating water absorption wheel 4 is rotatably connected to the top of the impurity separation chamber 5, and the circulating water absorption wheel 4 is movably connected to the periphery of the magnetic separation roller 10;

[0064] The capillary water absorption rods 22 on the circulating water absorption wheel 4 absorb water liquid, the water absorption chamber 25 accommodates the water liquid, and the water absorption channel 26 guides the water liquid to the circulating water absorption wheel 4 for absorption. The water liquid flowing on the surface enters the material distribution chamber 3 through the magnetic attraction layer 27 along the outer ring of the magnetic separation roller 10, causing pollution.

[0065] An extrusion seat 36 is arranged below the circulating water absorption wheel 4. The second central shaft 23 is arranged in the middle of the circulating water absorption wheel 4. The circulating water absorption wheel 4 is rotatably connected to the impurity separation chamber 5. The shape of the extrusion seat 36 is "7" - shaped, and a drainage channel 37 is recessed inside the extrusion seat 36, and the drainage channel 37 runs up and down;

[0066] The extrusion seat 36 extrudes the circulating water absorption wheel 4 to release the water liquid, enabling the circulating water absorption wheel 4 to have the ability to absorb water liquid again, and the drainage channel 37 drains away the liquid.

[0067] A capillary water absorption layer is formed by a ring of capillary water absorption rods 22 arranged on the outer ring of the circulating water absorption wheel 4. The capillary water absorption rods 22 are in mutual extrusion with the circulating water absorption wheel 4. The material of the circulating water absorption wheel 4 is sponge. The capillary water absorption rods 22 are composed of fiber long hairs. A water absorption cavity 25 is arranged at the top of the capillary water absorption rods 22. A water absorption channel 26 is arranged on the lower side of the capillary water absorption rods 22 where the water absorption cavity 25 is located. An oval cavity is arranged inside the water absorption channel 26. The top of the capillary water absorption rods 22 is frustum-shaped.

[0068] The material of the magnetic attraction layer 27 is ceramic or soft magnetic material. The connecting pipe 21 is connected to an air suction pump. The air suction pump generates suction force on the material suction disc 38 through the connecting pipe 21, the feeding cavity 13 and the feeding pipe 18.

[0069] The feeding pipe 18 corresponds to the filter screen 16.

[0070] The top end of the air drying cavity 9 corresponds to the scraping plate II 8.

[0071] An air suction pump is arranged at one end of the connecting pipe 21. A feeding cavity 13 is concavely arranged inside the material suction table 12. A central shaft I 14 is rotatably connected inside the feeding cavity 13. Six feeding plates 15 are annularly arrayed around the periphery of the central shaft I 14. The feeding plates 15 are fan-shaped. An elastic sealing frame 17 is arranged on the outer ring of the feeding plates 15. The elastic sealing frame 17 is made of rubber.

[0072] One end of the feeding plate 15 away from the central shaft I 14 is movably connected to the inner wall of the feeding cavity 13.

[0073] One end of the electromagnet 33 is electrically connected to the conductive ring I 39. The other end of the electromagnet 33 is electrically connected to the graphite head 32. The graphite head 32 is slidably connected to the conductive ring II 40. The conductive ring II 40 is connected to the power supply. The conductive ring I 39 is connected to the power supply.

[0074] The magnetic field generating mechanism includes a magnetic attraction layer 27, a partition plate 28, a magnetic shielding cylinder I 29, a magnetic shielding cylinder II 30, a central shaft III 31, a graphite head 32, an electromagnet 33 and a conductive ring I 39. The electromagnets 33 are annularly arrayed inside the magnetic separation roller 10. The magnetic shielding cylinder I 29 is annularly arrayed and distributed inside the magnetic separation roller 10. Several magnetic attraction layers 27 are evenly arrayed on the outer ring of the magnetic separation roller 10. The magnetic attraction layers 27 correspond to the electromagnets 33.

[0075] The conductive ring II 40 is a ring with a notch. The magnetic attraction layers 27 are separated by the partition plate 28.

[0076] One end of the magnetic shielding cylinder 1 29 is connected to the magnetic shielding cylinder 2 30. The magnetic shielding cylinder 2 30 and the magnetic shielding cylinder 1 29 form a cavity with a notch. Both the magnetic shielding cylinder 1 29 and the magnetic shielding cylinder 2 30 are made of shielding materials.

[0077] The specific implementation method is as follows: The material suction disc 38 sucks and collects high-purity silicon raw material particles. The raw material particles enter the top of the feeding cavity 13 through the feeding pipe 18. The filter screen 16 intercepts the raw material particles. The raw material particles remain in the space above the central shaft 1 14 and between the distribution plates 15. The distribution plates 15 are used to separate the cavity of the feeding cavity 13, generating multiple closed cavities, so that the air pressure change generated during the process of collecting raw materials will not affect the inner cavity of the magnetic adsorption cavity 2, and the air flow will not reach the inside of the distribution cylinder 11 through the feeding cavity 13, avoiding the air flow blowing the surface of the magnetic separation roller 10 and causing the adsorbed impurities to fall off; The motor is used to control the slow rotation of the distribution plate 15. The closed cavity at the top of the feeding cavity 13 intercepts and collects the raw material particles. As the distribution plate 15 slowly rotates, the closed cavity of the collected raw material particles rotates to the bottom of the feeding cavity 13, so that the raw material particles in the closed cavity at the bottom of the feeding cavity 13 reach the communication channel 24 by gravity, and reach the internal channel of the distribution cylinder 11 through the communication channel 24;

[0078] The raw material particles flowing in the internal channel of the distribution cylinder 11 are deflected by the guiding drum bulge 35 and fly, so that the raw material particles are dispersed in the enlarged part of the distribution cylinder 11. The distribution arc plate 34 shunts the flying raw material particles so that the raw material particles move to a position farther away from the middle of the housing 1, so that the raw material particles are more evenly dispersed to the top of the outer ring of the magnetic separation roller 10, making the impurities in the raw material particles fully exposed and making the impurities in the raw material particles more fully contact with the outer ring of the magnetic separation roller 10, so as to be adsorbed by the magnetic separation roller 10, enabling the distribution cylinder 11 and the magnetic separation roller 10 to process more raw material particles per unit time, thus greatly improving the working efficiency;

[0079] During the rotation of the magnetic separation roller 10, some of the graphite heads 32 come into contact with the second conductive ring 40. The electromagnet 33 where the graphite head 32 is located is connected to the circuit and is energized to generate a magnetic field. The magnetic field generated by the electromagnet 33 is used to adsorb the impurities in the raw material particles. When the part of the electromagnet 33 that adsorbs the impurities rotates to the impurity separation cavity 5 along with the magnetic separation roller 10, the graphite head 32 on the electromagnet 33 in this part is separated from the second conductive ring 40, so that the magnetic field of the electromagnet 33 in this part disappears, and the adsorbed impurities fall due to gravity. In addition, some of the impurities adhering to the magnetic adsorption layer 27 of the magnetic separation roller 10 are scraped off by the first scraping plate 7;

[0080] The magnetic separation roller 10 continues to rotate to the position corresponding to the water washing chamber 6, and the flushing nozzle 19 sprays out the aqueous solution to wash the surface of the magnetic separation roller 10, so as to wash away the impurities on the surface of the magnetic separation roller 10. The second scraping plate 8 continues to scrape the surface of the magnetic separation roller 10 and blocks the aqueous solution to prevent the aqueous solution from flowing out of the inner cavity of the water washing chamber 6 through the gap between the second scraping plate 8 and the magnetic separation roller 10;

[0081] If part of the aqueous solution passes through the first scraping plate 7, the water droplets sliding down along the surface of the magnetic separation roller 10 will encounter the circulating water absorption wheel 4. The capillary water absorption rods 22 on the circulating water absorption wheel 4 absorb the aqueous solution, the water absorption cavity 25 accommodates the aqueous solution, and the water absorption channel 26 guides the aqueous solution to the circulating water absorption wheel 4 for absorption. The aqueous solution flowing on the surface enters the material distribution chamber 3 through the magnetic absorption layer 27 along the outer ring of the magnetic separation roller 10, causing pollution;

[0082] The extrusion seat 36 extrudes the circulating water absorption wheel 4 to release the aqueous solution, enabling the circulating water absorption wheel 4 to have the ability to absorb the aqueous solution again. The air jet head 20 generates an air flow to spray on the magnetic separation roller 10 to dry the surface of the magnetic separation roller 10, enabling the magnetic separation roller 10 to regain the ability to efficiently absorb impurities, and the entire process is highly automated.

[0083] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those ordinary technical personnel who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine task of design, manufacturing, and production.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A collection device for preparing high-purity silicon powder, characterized in that: The invention comprises a shell (1), wherein a magnetic suction chamber (2) is provided inside the shell (1), a material distribution barrel (11) is provided on the inner top wall of the magnetic suction chamber (2), a connecting channel (24) is provided on the inner top wall of the magnetic suction chamber (2), the connecting channel (24) is connected to the inner channel of the material distribution barrel (11), the bottom of the inner channel of the material distribution barrel (11) is enlarged, a magnetic separation roller (10) is rotatably connected to the middle of the magnetic suction chamber (2), the opening at the bottom end of the inner channel of the material distribution barrel (11) faces the magnetic separation roller (10), a material blocking plate (41) is rotatably connected to the top of one side of the magnetic suction chamber (2), the bottom of the magnetic suction chamber (2) is formed into a material distribution chamber (3), an impurity separation chamber (5) and a water washing chamber (6), and a magnetic field generating mechanism is provided inside the magnetic separation roller (10); The material separation chamber (3) and the impurity separation chamber (5) are located below the magnetic separation roller (10), a material collection assembly is provided at the top of the shell (1), and an air drying chamber (9) is provided on the other side of the magnetic suction chamber (2).

2. A collection device for preparing high-purity silicon powder according to claim 1, characterized in that: The material collection assembly comprises a suction platform (12), one side of the suction platform (12) is connected to a suction plate (38) via a feed pipe (18), a feed chamber (13) is recessed inside the suction platform (12), the top of one side of the feed chamber (13) is connected to the feed pipe (18), a filter screen (16) is provided at the top of the other side of the feed chamber (13), the filter screen (16) is connected to a connecting pipe (21), a leakage hole is recessed at the bottom end of the feed chamber (13), and the leakage hole is connected to a connecting channel (24).

3. The collection device for preparing high-purity silicon powder according to claim 1, characterized in that: A material guiding bulge (35) is arranged at the bottom of the internal channel of the material distributing barrel (11), and the material guiding bulge (35) is a structure that is convex at the top and flat at the bottom, and is similar in shape to an airplane wing.

4. A collection device for preparing high-purity silicon powder according to claim 3, characterized in that: The internal channel of the material distribution barrel (11) is rotatably connected to a material distribution arc plate (34) located below the material guide bulge (35), and the material distribution arc plate (34) is in a scimitar shape.

5. The collection device for preparing high-purity silicon powder according to claim 1, characterized in that: The water washing chamber (6) is a space separated by a scraper plate 1 (7), a scraper plate 2 (8) and a magnetic separation roller (10). The scraper plate 1 (7) and the scraper plate 2 (8) are both movably connected to the magnetic separation roller (10). The scraper plate 1 (7) and the scraper plate 2 (8) are both made of rubber.

6. A collection device for preparing high-purity silicon powder according to claim 5, characterized in that: A flushing nozzle (19) is arranged at the top of the water washing chamber (6), and the direction of the flushing nozzle (19) is tangential to the magnetic separation roller (10).

7. The collection device for preparing high-purity silicon powder according to claim 1, characterized in that: A nozzle (20) is arranged at the bottom end of the outer side of the distributing barrel (11), and the nozzle head (20) is tangent to the magnetic separation roller (10). An air pipe is arranged on the nozzle head (20), and the air pipe extends out of the shell (1) from the inside of the magnetic suction chamber (2).

8. The collection device for preparing high-purity silicon powder according to claim 1, characterized in that: The top of the impurity separation chamber (5) is rotatably connected to a circulating water suction wheel (4), and the circulating water suction wheel (4) is movably connected to the periphery of the magnetic separation roller (10).

9. A collection device for preparing high-purity silicon powder according to claim 8, characterized in that: An extrusion seat (36) is arranged below the circulating water suction wheel (4), the central axis (23) is arranged in the middle of the circulating water suction wheel (4), the circulating water suction wheel (4) is rotatably connected to the impurity separation chamber (5), the extrusion seat (36) is in the shape of a "7", a drainage channel (37) is recessed inside the extrusion seat (36), and the drainage channel (37) runs up and down.

10. A collection device for preparing high-purity silicon powder according to claim 9, characterized in that: The outer ring of the circulating water absorption wheel (4) is provided with a circle of capillary water absorption rods (22), the capillary water absorption rods (22) form a capillary water absorption layer, the capillary water absorption rods (22) and the circulating water absorption wheel (4) are mutually squeezed, and the material of the circulating water absorption wheel (4) is sponge; The capillary water absorption rod (22) is made of long fiber hairs, a water absorption cavity (25) is arranged at the top of the capillary water absorption rod (22), a water absorption channel (26) is arranged at the lower side of the water absorption cavity (25) of the capillary water absorption rod (22), an elliptical cavity is arranged inside the water absorption channel (26), and the top of the capillary water absorption rod (22) is truncated cone-shaped; The material of the magnetic absorption layer (27) is ceramic or soft magnetic material. The connecting pipe (21) is connected to the suction pump. The suction pump generates suction force on the suction plate (38) through the connecting pipe (21), the feeding cavity (13) and the feeding pipe (18).

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