Granular silicon demagnetizing device

Abstract

The utility model provides a granular silicon demagnetizing device which comprises a trough, a plurality of magnetic bars are erected in the trough, granular silicon can enter from the top of the trough, penetrate through the plurality of magnetic bars and are discharged from the bottom of the trough, and the magnetic bars can adsorb magnetic impurities on the surface of the granular silicon. The automatic demagnetizing device has the beneficial effects that automatic demagnetizing of a small amount of silicon particles is realized, the demagnetizing effect is ensured, the labor is saved, the production cost is reduced, the structure is simple, and the operation is convenient and fast.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor material manufacturing, in particular to a granular silicon demagnetization device. Background Art

[0002] Granular silicon will produce magnetic impurities during the production process. Granular silicon with magnetic impurities on its surface will affect the life of the monocrystalline silicon if it is directly used to produce monocrystalline silicon. In the prior art, special demagnetization equipment is usually used to remove magnetic impurities on the surface of batch granular silicon. However, during use, such as during the loading process or leakage of the re-feeder, a small amount of granular silicon will fall on the ground and come into contact with the steel plates or other metal objects on the ground, causing some magnetic impurities to adhere to the surface of the granular silicon. When demagnetizing a small amount of granular silicon, the cost of using special equipment is relatively high. Operators usually use magnetic tools such as magnetic bars to remove magnetic impurities, which is inefficient and has high labor costs. In addition, due to operational differences, the demagnetization effect cannot be guaranteed. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a granular silicon demagnetization device, which effectively solves the problems of low manual demagnetization efficiency of a small amount of granular silicon, high production cost, and unguaranteed demagnetization effect, and overcomes the shortcomings of the prior art.

[0004] The technical solution adopted by the utility model is: a granular silicon demagnetization device, including a material trough, in which a plurality of magnetic bars are arranged, and the granular silicon can enter from the top of the material trough, pass through the plurality of magnetic bars and be discharged from the bottom of the material trough, and the magnetic bars can adsorb magnetic impurities on the surface of the granular silicon.

[0005] Optionally, the magnetic bars are arranged horizontally in layers, each layer is provided with a plurality of the magnetic bars, and the magnetic bars at different heights are parallel to each other and staggered in the vertical direction.

[0006] Optionally, the magnetic bars located at the bottom layer are arranged at equal intervals with a first gap, and the magnetic bars located at other layers are arranged at equal intervals with a second gap, and the first gap is smaller than the second gap.

[0007] Optionally, a through hole is provided in the material trough at a position relative to the magnetic rod, and two ends of the magnetic rod are connected to the through hole.

[0008] Optionally, the through holes located at the bottom layer are horizontally arranged long holes, and both ends of the magnetic rod are detachably connected to the long holes.

[0009] Optionally, the through hole above the elongated hole is a circular hole, and the circular hole is connected to two ends of the magnetic bar to horizontally limit the magnetic bar.

[0010] Optionally, fasteners are provided at both ends of the magnetic bar, and the fasteners are arranged on the outside of the material trough to detachably connect the magnetic bar to the circular hole.

[0011] Optionally, two ends of the magnetic bar are provided with connecting pieces to rotatably connect the magnetic bar to the circular hole.

[0012] Optionally, the material trough includes an upper section and a lower section which are connected to each other, the magnetic bar is mounted on the lower section, the upper section is vertically arranged, and the two sides of the lower section where the magnetic bar is not arranged are inclined close to the central axis of the material trough.

[0013] Optionally, support frames are arranged opposite to each other on both sides of the upper section.

[0014] The advantages and positive effects of the utility model are: due to the adoption of the above technical scheme, automatic demagnetization of a small amount of granular silicon is achieved, the demagnetization effect is guaranteed, labor is saved, production costs are reduced, the structure is simple, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a granular silicon demagnetization device according to an embodiment of the utility model.

[0016] Figure 2 It is a side view of a granular silicon demagnetization device according to an embodiment of the utility model.

[0017] Figure 3 It is a side view of a granular silicon demagnetization device according to another embodiment of the utility model.

[0018] Figure 4 It is a top view of a granular silicon demagnetization device according to an embodiment of the utility model.

[0019] In the figure:

[0020] 1. Material trough 2. Magnetic bar 3. Material inlet

[0021] 4. Discharge port 5. Long hole 6. Fixing bolt

[0022] 7. Fasteners 8. Connectors 9. Upper section

[0023] 10. Lower section 11. Support frame DETAILED DESCRIPTION

[0024] The embodiment of the utility model provides a granular silicon demagnetization device, and the embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0025] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0026] like Figure 1 As shown, a granular silicon demagnetization device according to an embodiment of the utility model comprises a material trough 1 and a plurality of magnetic bars 2. The top and bottom of the material trough 1 are both in an open state, the top of the material trough 1 is a feed port 3, and the bottom of the material trough 1 is a discharge port 4. A plurality of magnetic bars 2 are set up inside the material trough 1. Granular silicon with magnetic impurities on the surface enters the material trough 1 from the feed port 3, passes through a plurality of magnetic bars 2 and is discharged from the discharge port 4. When the granular silicon passes through the magnetic bars 2, the magnetic bars 2 can adsorb and remove the magnetic impurities on the surface of the granular silicon.

[0027] Specifically, the magnetic rods 2 are arranged horizontally in layers, and each layer is provided with a plurality of magnetic rods 2. The magnetic rods 2 at different heights are arranged parallel to each other and staggered in the vertical direction, and the specific number of layers is not limited. In this embodiment, a plurality of horizontally arranged magnetic rods 2 are arranged at the same height of the material trough 1, so that the magnetic rods 2 are arranged in layers to form four magnetic rod layers. The magnetic rods 2 at different layers are parallel to each other. In order to allow the surface of the granular silicon to fully contact the magnetic rods 2, the magnetic rods 2 at different layers are staggered in the vertical direction. The spacing height between each layer is the same.

[0028] Preferably, the magnetic bars 2 located at the bottom layer are arranged at equal intervals of the first gap, and the magnetic bars 2 located at other layers are arranged at equal intervals of the second gap, and the first gap is smaller than the second gap. In order to prevent the granular silicon from being stuck by the magnetic bars 2, the gap between the magnetic bars 2 needs to be larger than the particle size of the granular silicon. Both the first gap and the second gap need to be larger than the particle size of the granular silicon. In order to ensure the demagnetization effect, the first gap is smaller than the second gap to prevent the granular silicon from passing through the magnetic bars at the top of the bottom layer without contacting the magnetic bars, and further demagnetization is performed through the first gap with a smaller gap value.

[0029] Specifically, in order to facilitate the installation of the magnetic rod 2, a through hole is opened at a position of the material trough 1 relative to the magnetic rod 2, and both ends of the magnetic rod 2 are connected to the through hole.

[0030] Preferably, the through hole at the bottom layer is a horizontally arranged long strip hole 5, and the two ends of the magnetic rod 2 are detachably connected to the long strip hole 5. In this embodiment, in order to facilitate connection, threaded holes are provided at both ends of the magnetic rod 2, and fixed to the long strip hole 5 with fixing bolts 6. Due to the difference in the particle size of granular silicon, it ranges from a few tenths of a millimeter to more than ten millimeters. The particle size of the granular silicon to be demagnetized is different each time. At the same time, in order to ensure the demagnetization effect of the granular silicon, the setting of the first gap should not be too large. By setting the long strip hole 5, the first gap between the magnetic rods 2 can be changed, so that the first gap can be adjusted according to the particle size of the granular silicon to be demagnetized to ensure the demagnetization effect. When the particle size of the particles to be demagnetized is large, the first gap can be increased, and when the particle size of the particles to be demagnetized is small, the first gap can be reduced. The setting of the second gap needs to be greater than the maximum value of the first gap.

[0031] Specifically, the through hole above the long hole 5 is a circular hole, which is connected to both ends of the magnetic bar 2 to limit the horizontal position of the magnetic bar 2 .

[0032] In certain embodiments, such as Figure 2 As shown, fasteners 7 are provided at both ends of the magnetic bar 2, and the fasteners 7 are arranged outside the trough 1 to detachably connect the magnetic bar 2 to the round hole. The fasteners 7 can be set as fixing bolts 6, and threaded holes are provided at both ends of the magnetic bar 2. The fixing bolts 6 pass through the round hole outside the trough 1 and are connected to the threaded holes at the ends of the magnetic bar 2, so that the magnetic bar 2 is fixed to the trough 1. This can prevent the magnetic bar 2 from falling off from the trough 1 and facilitate disassembly and cleaning.

[0033] In certain embodiments, such as Figure 3 As shown, connecting pieces 8 are provided at both ends of the magnetic bar 2 to rotatably connect the magnetic bar 2 to the circular hole. In the present embodiment, the connecting piece 8 is configured as a connecting bolt, and threaded holes are provided at both ends of the magnetic bar 2. The connecting bolt passes through the circular hole on the outside of the material trough 1 and is connected to the threaded hole at the end of the magnetic bar 2. It is worth noting that a spacing is provided between the connecting nut and the outside of the material trough 1 in the present embodiment, and the magnetic bar 2 is only connected to the circular hole, but the magnetic bar 2 is not fixed to the material trough 1. When the granular silicon passes through the first gap, it contacts the magnetic bar 2, which can drive the magnetic bar 2 to rotate. The rotation of the magnetic bar 2 is more conducive to the smooth passage of the granular silicon. The connecting piece 8 is configured as a connecting bolt, which is more convenient for the disassembly and cleaning of the magnetic bar 2.

[0034] Preferably, the trough 1 includes an upper section 9 and a lower section 10 which are connected to each other, a magnetic rod 2 is mounted on the lower section 10, and the upper section 9 is vertically arranged. In order to facilitate the falling of granular silicon, the lower section 10 is not provided with both sides of the magnetic rod 2 and is inclined near the central axis of the trough 1. In this embodiment, the cross-section of the trough 1 is rectangular. In order to install more magnetic rods 2, the height of the lower section 10 is greater than the height of the upper section 9. The lower section 10 is not provided with both sides of the magnetic rod 2 and is inclined near the central axis of the trough 1. The lower section 10 is provided with both sides of the magnetic rod 2 arranged vertically. It is worth noting that the material of the trough 1 cannot use metal or other materials that may affect the performance of granular silicon.

[0035] Preferably, Figure 4 As shown, support frames 11 are arranged on both sides of the upper section 9. The shape of the support frame 11 is not limited. The support frame 11 is fixedly connected to the outer side of the upper section 9. The support frame 11 can be used to mount the trough 1 on the supporting tooling, which is more convenient for the use of the device.

[0036] Usage: According to the particle size of the granular silicon to be demagnetized, adjust the first gap between the bottom magnetic bars 2, use a special polyurethane shovel to pour the granular silicon to be demagnetized from the top feed port 3 into the trough 1 at a uniform speed, and the granular silicon passes through the layers of magnetic bars 2 and is discharged at the discharge port. The magnetic bars 2 in the silo adsorb the magnetic impurities on the surface of the granular silicon, realizing the automatic demagnetization of the granular silicon.

[0037] The advantages and positive effects of the utility model are:

[0038] 1. It realizes the automatic demagnetization of a small amount of granular silicon, improves work efficiency and ensures the demagnetization effect.

[0039] 2. Save labor and reduce production costs.

[0040] 3. The first gap between the bottom magnetic bars can be adjusted according to the particle size of the silicon particles to be demagnetized, further ensuring the demagnetization effect.

[0041] 4. Compared with existing large-scale demagnetization equipment, it has a simple structure and is easy to operate.

[0042] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A granular silicon demagnetization device, characterized in that: It comprises a material trough, in which a plurality of magnetic bars are arranged, and granular silicon can enter from the top of the material trough, pass through the plurality of magnetic bars and be discharged from the bottom of the material trough, and the magnetic bars can adsorb magnetic impurities on the surface of the granular silicon.

2. A granular silicon demagnetization device according to claim 1, characterized in that: The magnetic bars are arranged horizontally in layers, and each layer is provided with a plurality of the magnetic bars. The magnetic bars at different heights are parallel to each other and staggered in the vertical direction.

3. A granular silicon demagnetization device according to claim 2, characterized in that: The magnetic bars located at the bottom layer are arranged at equal intervals with a first gap, and the magnetic bars located at other layers are arranged at equal intervals with a second gap, and the first gap is smaller than the second gap.

4. A granular silicon demagnetization device according to claim 3, characterized in that: A through hole is provided at a position of the material trough relative to the magnetic rod, and two ends of the magnetic rod are connected to the through hole.

5. A granular silicon demagnetization device according to claim 4, characterized in that: The through holes located at the bottom layer are horizontally arranged long strip holes, and the two ends of the magnetic rod are detachably connected to the long strip holes.

6. A granular silicon demagnetization device according to claim 5, characterized in that: The through hole located above the long strip hole is a circular hole, and the circular hole is connected to the two ends of the magnetic bar to limit the horizontal position of the magnetic bar.

7. A granular silicon demagnetization device according to claim 6, characterized in that: Fasteners are provided at both ends of the magnetic bar, and the fasteners are arranged on the outside of the material trough to detachably connect the magnetic bar with the circular hole.

8. The granular silicon demagnetization device according to claim 6, characterized in that: Connectors are provided at both ends of the magnetic bar to rotatably connect the magnetic bar with the circular hole.

9. A granular silicon demagnetization device according to any one of claims 1 to 8, characterized in that: The material trough comprises an upper section and a lower section which are connected to each other, the magnetic bar is mounted on the lower section, the upper section is vertically arranged, and the two sides of the lower section which are not provided with the magnetic bar are inclined close to the central axis of the material trough.

10. The granular silicon demagnetization device according to claim 9, characterized in that: Support frames are arranged opposite to each other on both sides of the upper section.

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