A sieving device for removing powder from silicon material
By designing an automatic feeder, a multi-layer screening frame, and a screening device with a vibrating motor, the problem of powder adhesion on the surface of silicon material was solved, achieving efficient and precise powder separation and meeting the quality requirements of polycrystalline silicon material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG EAST HOPE NEW ENERGY CO LTD
- Filing Date
- 2024-11-26
- Publication Date
- 2026-05-26
AI Technical Summary
In the existing technology, powder adhering to the surface of silicon material during the screening process leads to a decrease in quality and affects the quality of silicon material.
Design a screening device including an automatic feeder, a screening frame and a vibrating motor. The screening frame can be slidably connected in the track. Screening is achieved through multiple layers of screen plates and the vibrating motor. The screen plate aperture gradually decreases. Combined with strong magnetic components and polyurethane coating, the screening efficiency and accuracy are improved.
It effectively reduces the powder content on the surface of silicon material, improves screening efficiency and accuracy, and ensures that the powder content in every 10 kg of polycrystalline silicon material does not exceed 5 grams, meeting the requirements for re-feeding.
Smart Images
Figure CN224272202U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of polycrystalline silicon processing equipment, and more particularly to the technical field of a sieving device for removing powder from silicon material. Background Technology
[0002] The market demand for silicon material has shifted from bulk materials to reprocessed feedstocks, leading to adjustments in silicon material processing techniques. When using a jaw crusher to crush silicon material, adjusting the crushing aperture size to accommodate reprocessed feedstocks revealed a significant increase in the powder content within the feedstock. This is because smaller silicon particle sizes result in a larger surface area, leading to greater contact between the silicon surface and its surrounding environment, making it easier for metal elements to be adsorbed onto the surface. A large amount of powder adhering to the silicon surface increases the surface metal content, negatively impacting silicon material quality. Utility Model Content
[0003] The technical problem to be solved by this utility model is how to reduce the surface contamination of silicon material after screening and reduce the amount of powder adhering to the surface of silicon material during the screening process.
[0004] To solve the above-mentioned technical problems, this utility model provides a sieving device for removing powder from silicon material, comprising:
[0005] A screening device, wherein an automatic feeder is provided at the inlet end of the screening device.
[0006] The screening device includes a fixed frame, a screening frame, and a vibrating motor; the fixed frame has tracks on both sides for the vibration of the screening frame, and the two sides of the screening frame are slidably connected to the tracks; the vibrating motor drives the screening frame to vibrate, thereby realizing the screening of powder.
[0007] Furthermore, the high screening frame structure includes multiple sieve plates and a vertical frame; all the sieve plates are arranged sequentially from top to bottom within the vertical frame; the aperture size of the same sieve plate is consistent, and the aperture size of all the sieve plates gradually decreases from top to bottom.
[0008] Furthermore, the aperture of the sieve plate is conical.
[0009] Furthermore, the inner wall of the vertical frame is provided with slide rails on both sides, and the two sides of the sieve plate are slidably connected to the slide rails on the same side.
[0010] Furthermore, the fixed frame includes two side plates, a top plate, and a bottom plate with the track provided; the top plate and the bottom plate are each provided with a groove for the side plates to slide.
[0011] Furthermore, a feed hopper is installed at one end of the top plate; a discharge pipe assembly is provided at the end of the screening frame facing away from the feed hopper, and the discharge pipe assembly has multiple discharge ports; the two discharge ports are installed on the left and right sides, and the lowest discharge port is located at the lower part of the main body of the screening machine.
[0012] Furthermore, the discharge pipe assembly is equipped with a strong magnetic component, which is located at the discharge port below.
[0013] Furthermore, the surface of the sieve plate and the inner wall of the discharge pipe assembly are both coated with polyurethane.
[0014] Furthermore, the base plate is provided with multiple support legs, and each support leg is provided with a shock absorption component.
[0015] Furthermore, a sheet metal mounting plate is also provided on the outside of the fixed frame.
[0016] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:
[0017] First, this utility model achieves automatic transfer of silicon material by setting an automatic feeder at the inlet end of the screening device 1, reducing manual operation and thus improving production efficiency.
[0018] Secondly, this utility model allows the screening frame to be slidably connected to the track on both sides, which makes the screening frame stable during vibration, facilitates maintenance and replacement, and also improves the stability of screening.
[0019] Third, this utility model uses a vibrating motor to drive the screening frame to vibrate, thereby achieving effective screening of powder in silicon material and improving screening efficiency and accuracy.
[0020] Fourth, by designing sieve plates with different aperture sizes, this utility model can accurately separate silicon materials of different particle sizes, thereby improving the sieving accuracy.
[0021] Fifth, this utility model increases the screening area through the design of multi-layer sieve plates, so that the powder adhering to the silicon material is separated more times when passing through the screening device, thereby improving the separation effect.
[0022] Sixth, by controlling the aperture size of the sieve plate to ≤3mm, this utility model ensures that the powder content in every 10 kg of polycrystalline silicon material does not exceed 5 grams after the polycrystalline silicon material is processed by the sieve plate, thus effectively reducing the powder content. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.
[0024] Figure 1 This is a front view of a sieving device for removing powder from silicon material according to the present invention;
[0025] Figure 2 This is a top view of a sieving device for removing powder from silicon material according to the present invention;
[0026] Figure 3 This is a perspective view of the screening frame, two side plates, and bottom plate of a screening device for removing powder from silicon material according to this utility model.
[0027] Figure 4 This is a perspective view of the screening frame, side plates, top plate, and bottom plate of a screening device for removing powder from silicon material according to the present invention.
[0028] Figure 5 This is a perspective view of the screening frame, one side plate, and the bottom plate of a screening device for removing powder from silicon material according to this utility model.
[0029] In the picture:
[0030] Fixed frame 11
[0031] Side plate 11a
[0032] Top plate 11b
[0033] 11c base plate
[0034] Screening frame 12
[0035] Vibration motor 13
[0036] Track 121
[0037] Vertical frame 122
[0038] Slide rail 122a
[0039] Sieve plate 123
[0040] Guide post 124
[0041] Feed hopper 2
[0042] Discharge pipe assembly 21
[0043] Discharge port 22
[0044] Strong magnetic component 211
[0045] Outrigger 3
[0046] Shock Absorption Component 31
[0047] Sheet metal mounting plate 5 Detailed Implementation
[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0049] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.
[0050] refer to Figures 1 to 5 This utility model provides a sieving device for removing powder from silicon material, comprising:
[0051] Screening device 1, with an automatic feeder (not shown in the figure) at the inlet end of the screening device 1;
[0052] The screening device 1 includes a fixed frame 11, a screening frame 12 and a vibration motor 13; the fixed frame 11 has rails 121 on both sides for the vibration of the screening frame 12, and the two sides of the screening frame 12 are slidably connected to the rails 121; the vibration motor 13 drives the screening frame 12 to vibrate, thereby realizing the screening of powder.
[0053] This invention features an automatic feeder at the inlet of the screening device 1, which automatically transports silicon material into the screening device, reducing manual operation and improving production efficiency. Furthermore, the screening frame 12 of this invention is slidably connected to the track 121 on both sides, ensuring stability during vibration and facilitating maintenance and replacement. Additionally, this invention uses a vibration motor 13 to drive the screening frame 12 to vibrate, achieving effective screening of powder in the silicon material and improving screening efficiency and accuracy.
[0054] In a preferred embodiment, such as Figure 3 As shown, the screening frame 12 includes multiple screen plates 123 and a vertical frame 122; all screen plates 123 are arranged sequentially from top to bottom within the vertical frame 122.
[0055] In a preferred embodiment, the vertical frame 122 is provided with a plurality of slots for sliding the screen plate 123, and the screen plate 123 with a larger aperture can be inserted into the upper slot first.
[0056] In a preferred embodiment, the aperture size of the same sieve plate 123 is consistent, and the aperture size of all sieve plates 123 gradually decreases from top to bottom. This invention, by using sieve plates with different aperture sizes, can accurately separate silicon materials of different particle sizes, improving the sieving accuracy. Furthermore, the multi-layer sieve plate design increases the sieving area, allowing powder adhering to the silicon material to be separated more times as it passes through the sieving device, thus enabling powders of different sizes to be separated according to their particle size.
[0057] In a preferred embodiment, the aperture of the sieve plate 123 is conical.
[0058] In a preferred embodiment, such as Figure 5 As shown, multiple guide posts 124 are provided on both sides of the vertical frame 122. Each guide post is slidably connected to the corresponding track 121, so that the vertical frame 122 can vibrate up and down within the height range of the track 121.
[0059] In a preferred embodiment, since the size of the material fed in the polysilicon production process is usually between 5mm and 50mm, the size of the sieve plate 123 needs to be controlled to ≤3mm, so that the polysilicon material can pass through the first layer (counting from top to bottom) of the sieve plate 123, and the powder adhering to the polysilicon material will fall from the sieve holes of the first layer of the sieve plate 123 to the lower layer.
[0060] In a preferred embodiment, after testing, it was found that controlling the size of the sieve plate 123 to ≤3mm ensures that after the polysilicon feed is processed by the sieve plate 123, the powder content in every 10 kg of polysilicon material does not exceed 5 grams.
[0061] In a preferred embodiment, the present invention uses high-frequency vibration screening technology to accelerate the movement of polycrystalline silicon material on the screen plate, improve screening efficiency, reduce the possibility of screen hole blockage, and achieve a screening device processing capacity of ≥2t / h (i.e., processing 2 tons of feed per hour).
[0062] In a preferred embodiment, such as Figure 3 As shown, slide rails 122a are provided on both sides of the inner wall of the vertical frame 122, and the corresponding sieve plate 123 is slidably connected to the slide rail 121a on the same side. The sieve plate 123 can be gradually slid into the front inlet of the vertical frame 122, which provides efficiency for disassembly and maintenance.
[0063] In a preferred embodiment, such as Figures 3 to 5As shown, the fixed frame 11 includes two side plates 11a, a top plate 11b, and a bottom plate 11c, each with a track 121. Both the top plate 11b and the bottom plate 11c have grooves for sliding the side plates 11a. Specifically, the bottom plate 11c can be mounted on multiple support legs 3, then the two side plates 11a are respectively mounted on the grooves on both sides of the bottom plate 11c, and then the top plate 11b is placed over the two side plates 11a, with two grooves on the lower end face of the top plate 11b respectively located on the two side plates 11a.
[0064] In order to fix the side plate 11a, top plate 11b and bottom plate 11c, the connection between the side plate 11a and the top plate 11b can be fixed with fasteners. Similarly, the connection between the side plate 11a and the bottom plate 11c can be fixed with fasteners.
[0065] In a preferred embodiment, such as Figure 4 As shown, a feed hopper 2 is installed at one end of the top plate 11b; specifically, an opening is made at one end of the top plate 11b, and the feed hopper 2 is installed at the opening. The feed hopper 2 is installed at one end of the top plate 11b, so that silicon material can be easily poured into the screening device 1 to start the screening process.
[0066] In a preferred embodiment, such as Figure 2 As shown, the end of the screening frame 12 facing away from the feed hopper 2 is provided with a discharge pipe group 21, and the discharge pipe group 21 is provided with multiple discharge ports 22; the two discharge ports 22 are installed on the left and right sides, and the lowermost discharge port 22 is located at the lower part of the main body of the screening device 1.
[0067] In a preferred embodiment, such as Figure 2 As shown, the discharge pipe assembly 21 is equipped with a strong magnetic component (not shown in the figure), which is located at the lower discharge port 22. Specifically, the strong magnetic component is located below one of the discharge ports of the discharge pipe assembly 21, and its main function is to use magnetism to adsorb and separate ferromagnetic impurities in the material. Since the powder currently adsorbed on the polycrystalline silicon feed includes Fe, Gr, Ni, Cu, Zn, and Na, the strong magnetic component 211 can effectively separate Fe (iron), Co (cobalt), and Ni (nickel).
[0068] In a preferred embodiment, both the surface of the sieve plate 123 and the inner wall of the discharge pipe assembly 21 are coated with polyurethane. Polyurethane is a wear-resistant material, and coating it on the surface of the sieve plate 123 and the inner wall of the discharge pipe assembly 21 can improve wear resistance and extend the service life of the sieve plate 123 and the discharge pipe assembly 21. In addition, the smooth surface of polyurethane can reduce the adhesion of silicon material during the screening process and improve screening efficiency.
[0069] In a preferred embodiment, such as Figures 1 to 5As shown, the base plate 11c is provided with multiple support legs 3, and each support leg 3 is provided with a shock-absorbing component 41. The shock-absorbing component 41 can absorb the vibration generated during the screening process, reduce the impact on the surrounding environment, and also protect the screening device itself and extend its service life.
[0070] In a preferred embodiment, such as Figure 1 As shown, a sheet metal mounting plate 5 is also provided on the outer side of the fixed frame 11. The sheet metal mounting plate 5 can reduce the impact of the external environment on the internal mechanical parts, such as preventing the intrusion of dust and moisture, thereby reducing maintenance requirements.
[0071] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.
Claims
1. A sieving device for removing powder from silicon material, characterized in that, include: A screening device, wherein an automatic feeder is provided at the inlet end of the screening device. The screening device includes a fixed frame, a screening frame, and a vibrating motor; the fixed frame has tracks on both sides for the vibration of the screening frame, and the two sides of the screening frame are slidably connected to the tracks; the vibrating motor drives the screening frame to vibrate, thereby realizing the screening of powder.
2. The sieving device for removing powder from silicon material according to claim 1, characterized in that, The screening frame includes multiple sieve plates and a vertical frame; all the sieve plates are arranged sequentially from top to bottom within the vertical frame; the aperture size of the same sieve plate is consistent, and the aperture size of all the sieve plates gradually decreases from top to bottom.
3. A sieving device for removing powder from silicon material according to claim 2, characterized in that, The sieve plate has a conical aperture.
4. A sieving device for removing powder from silicon material according to claim 2, characterized in that, The inner wall of the vertical frame is provided with slide rails on both sides, and the two sides of the sieve plate are slidably connected to the slide rails on the same side.
5. A sieving device for removing powder from silicon material according to claim 2, characterized in that, The fixed frame includes two side plates, a top plate, and a bottom plate with the track provided; the top plate and the bottom plate are each provided with a groove for the side plates to slide.
6. A sieving device for removing powder from silicon material according to claim 5, characterized in that, A feed hopper is installed at one end of the top plate; a discharge pipe assembly is provided at the end of the screening frame facing away from the feed hopper, and the discharge pipe assembly has multiple discharge ports; the two discharge ports are installed on the left and right sides, and the lowest discharge port is located at the bottom of the main body of the screening machine.
7. A sieving device for removing powder from silicon material according to claim 6, characterized in that, The discharge pipe assembly is equipped with a strong magnetic component, which is located at the discharge port below.
8. A sieving device for removing powder from silicon material according to claim 6, characterized in that, The surface of the sieve plate and the inner wall of the discharge pipe assembly are both coated with polyurethane.
9. A sieving device for removing powder from silicon material according to claim 5, characterized in that, The base plate is provided with multiple support legs, and each support leg is provided with a shock absorption component.
10. A sieving device for removing powder from silicon material according to claim 5, characterized in that, The fixed frame is also provided with a sheet metal mounting plate on its outer side.