Silicon powder impurity removal device
By designing a multi-stage magnetic separation and decomposition device, the problem of low passing efficiency of screens for fine materials in silicon powder production is solved, and efficient decomposition and particle size screening is achieved, which significantly improves the purity and particle size consistency of silicon powder.
Patent Information
- Application Number
- CN202421420656.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-20
AI Technical Summary
In the existing silicon powder production process, the screen has low efficiency in passing on fine materials, resulting in poor impurity removal, especially when the particle size requirements are small.
A silicon powder removal device including multiple magnetic separator is designed. Through the combination of L-shaped feed barrels, Shakron, induced fan and magnetic separator, multi-stage impurity removal and particle size screening are achieved, avoiding the efficiency problems of traditional screens.
Through multi-stage magnetic separation and decomposition, the purity and particle size consistency of silicon powder are significantly improved, and the efficiency of decomposition is improved, and the problem of low screening and decomposition efficiency is solved.
Smart Images
Figure CN222753465U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silicon powder production equipment, in particular to a silicon powder impurity removal device. Background Art
[0002] Silica powder is widely used in daily life and has high value. It is the main raw material for high-temperature refractory materials, iron, aluminum alloy, silica sol, silicone, etc. The raw materials of silica powder are mainly silicon ore or quartz sand, which is made through crushing, grinding, screening, drying and other processes. Granulation is also required under specific needs. In the current process, it is screened through a vibrating screen, and the coarse particles on the screen are returned to the grinder, and the fine particles under the screen enter the next process. Impurities are also removed during the screening process, mainly to remove iron-containing impurities. However, for the demand for small particle size, the mesh size of the screen is small and the pass rate is low, which further causes the screening and impurity removal efficiency to be low. Therefore, further improvements are needed. Utility Model Content
[0003] In view of the above technical problems, the utility model provides a device for removing impurities from silicon powder with smaller particle size.
[0004] In order to solve the above technical problems, a silicon powder impurity removal device described in the utility model includes a feed barrel, which is an L-shaped structure. One end of the upper part of the feed barrel is fixedly connected to the feed port, the other end is connected to the side wall of the shaker through a pipeline, and the bottom end is connected to the return pipe through a pipeline. The lower part of the feed barrel is fixedly connected to the first air lock, and the first magnetic separation cylinder is fixedly connected below the first air lock. The lower part of the shaker is fixedly connected to the second air lock, and the second magnetic separation cylinder is fixedly connected to the lower part of the second air lock. The bottom end of the shaker is also connected to the return pipe through a pipeline, and the top of the shaker is fixedly connected to the input end of the induced draft fan through a pipeline, the output end of the induced draft fan is fixedly connected to the bag collector, and the output end of the bag collector is fixedly connected to the finished product bin, and the top of the finished product bin is fixedly connected to the third magnetic separation cylinder.
[0005] Furthermore, the first magnetic separation cylinder, the second magnetic separation cylinder and the third magnetic separation cylinder have the same structure and all include magnetic separation rollers and a central axis. The magnetic separation rollers are arranged at intervals around the central axis and both ends are fixedly connected to the connecting disk. One end of the central axis passes through the connecting disk and is fixedly connected thereto.
[0006] Furthermore, the first magnetic separation cylinder, the second magnetic separation cylinder, the third magnetic separation cylinder, the first air lock, and the second air lock are all driven by a motor.
[0007] Compared with the prior art, the utility model has the following advantages:
[0008] 1. The utility model can remove impurities from silicon powder of different particle sizes by arranging multiple magnetic separation drums. The purity of the finished product is ensured through multi-stage impurity removal. Silicon powder with larger particle sizes is removed twice or even multiple times, which ensures the impurity removal effect while screening the particle size of the silicon powder. The conveying and screening method of the induced draft fan and the Shakron is used to avoid the problem of low efficiency of the traditional screen for the passage of fine materials, which leads to poor impurity removal effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the utility model.
[0010] Figure 2 This is a schematic diagram of the structure of the magnetic separation cylinder of the utility model.
[0011] In the figure: 1. feed barrel, 2. Shakron, 3. induced draft fan, 4. bag collector, 5. finished product bin, 6. first air lock, 7. second air lock, 8. first magnetic separation barrel, 9. second magnetic separation barrel, 10. third magnetic separation barrel, 11. feed port, 12. return pipe, 13. connecting plate, 14. middle shaft, 15. magnetic separation roller. DETAILED DESCRIPTION
[0012] The utility model will be further described below in conjunction with the accompanying drawings.
[0013] like Figure 1 , Figure 2 A silicon powder impurity removal device shown includes a feed barrel 1, which is an L-shaped structure. One end of the upper part of the feed barrel 1 is fixedly connected to the feed port 11, the other end is connected to the side wall of the shaker 2 through a pipeline, and the bottom end is connected to the return pipe 12 through a pipeline. The lower part of the feed barrel 1 is fixedly connected to the first air lock 6, and the first magnetic separation cylinder 8 is fixedly connected below the first air lock 6. The lower part of the shaker 2 is fixedly connected to the second air lock 7, and the second magnetic separation cylinder 9 is fixedly connected below the second air lock 7. The bottom end of the shaker 2 is also connected to the return pipe 12 through a pipeline. The top of the shaker 2 is fixedly connected to the input end of the induced draft fan 3 through a pipeline, the output end of the induced draft fan 3 is fixedly connected to the bag collector 4, the output end of the bag collector 4 is fixedly connected to the finished product bin 5, and the top of the finished product bin 5 is fixedly connected to the third magnetic separation cylinder 10.
[0014] It should be noted that: in this embodiment, the model of the Shaklong 2 is XFXF-1200; the model of the induced draft fan 3 is HYY9-28.
[0015] In order to perform multi-stage impurity removal, the first magnetic separation cylinder 8, the second magnetic separation cylinder 9, and the third magnetic separation cylinder 10 used have the same structure, all of which include magnetic separation rollers 15 and a central axis 14. The magnetic separation rollers 15 are arranged at intervals around the central axis 14 and both ends are fixedly connected to the connecting disk 13. One end of the central axis 14 passes through the connecting disk 13 and is fixedly connected thereto.
[0016] In order to increase the impurity removal effect, the first magnetic separation drum 8, the second magnetic separation drum 9, the third magnetic separation drum 10, the first air shutoff device 6, and the second air shutoff device 7 are all driven by a motor, so that the magnetic separation roller 15 rotates around the central axis 14 to increase the contact time with its material, thereby increasing the impurity removal effect.
[0017] The working process of this embodiment is as follows:
[0018] Turn on the induced draft fan 3 and the motors on the first magnetic separator 8, the second magnetic separator 9, the third magnetic separator 10, the first air lock 6, and the second air lock 7, and then pour the crushed and ground silicon powder into the feed port 11, where the silicon powder particles with larger particle sizes will fall due to their own gravity, enter the first magnetic separator 8 through the first air lock 6 for magnetic separation and impurity removal, and then enter the return pipe 12 through the pipeline for secondary grinding, and another part of the silicon powder enters the Shaklong 2 for separation, and the silicon powder with larger particle size is magnetically separated through the second air lock 7 and the second magnetic separator 9 at the bottom of the Shaklong 2, and finally The silicon powder enters the return pipe 12 through a pipeline and returns for secondary grinding. The silicon powder with qualified particle size enters the bag collector 4 through the pipeline on the top of the Shaklong 2 and the induced draft fan 3. The silicon powder enters the finished product bin 5 through the discharge end of the bag collector 4. A third magnetic separation cylinder is arranged above the finished product bin 5 to perform magnetic separation and impurity removal on the silicon powder to ensure the purity of the finished product. After multi-stage impurity removal is performed on silicon powder of different particle sizes, the impurity removal effect is guaranteed while the efficiency is improved. At the same time, the silicon powder with larger particle size is de-impurized twice or even multiple times to ensure the particle size of the finished product while further ensuring the purity of the finished product.
Claims
1. A silicon powder impurity removal device, comprising a feed barrel (1), characterized in that: The feed barrel (1) is an L-shaped structure, one end of the upper part of the feed barrel (1) is fixedly connected to the feed port (11), the other end is connected to the side wall of the shaker (2) through a pipeline, and the bottom end is connected to the return pipe (12) through a pipeline. The lower part of the feed barrel (1) is fixedly connected to the first air blocker (6), and the lower part of the first air blocker (6) is fixedly connected to the first magnetic separation cylinder (8). The lower part of the shaker (2) is fixedly connected to the second air blocker (7), and the lower part of the second air blocker (7) is fixedly connected to the second magnetic separation cylinder (9). The bottom end of the shaker (2) is also connected to the return pipe (12) through a pipeline. The top end of the shaker (2) is fixedly connected to the input end of the induced draft fan (3) through a pipeline, the output end of the induced draft fan (3) is fixedly connected to the bag collector (4), the output end of the bag collector (4) is fixedly connected to the finished product bin (5), and the top of the finished product bin (5) is fixedly connected to the third magnetic separation cylinder (10).
2. The silicon powder impurity removal device according to claim 1, characterized in that: The first magnetic separation cylinder (8), the second magnetic separation cylinder (9), and the third magnetic separation cylinder (10) have the same structure and all comprise magnetic separation rollers (15) and a central axis (14); the magnetic separation rollers (15) are arranged at intervals around the central axis (14) and both ends are fixedly connected to the connecting disk (13); one end of the central axis (14) passes through the connecting disk (13) and is fixedly connected thereto.
3. The silicon powder impurity removal device according to claim 1, characterized in that: The first magnetic separation cylinder (8), the second magnetic separation cylinder (9), the third magnetic separation cylinder (10), the first air lock (6) and the second air lock (7) are all driven by a motor.