A screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste

Abstract

This utility model discloses a spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste, including a base. An electric furnace body is fixedly connected to the upper end of the base. A conveyor body is positioned above the base. Multiple fixing frames are fixedly connected to the side wall of the conveyor body, and the lower ends of each fixing frame are connected to the base via columns. A control box is located on one side of the conveyor body. A feed cylinder is connected to the inlet of the conveyor body, and a feeding device is fixedly connected to the upper end of the feed cylinder. A pushing device is located on one side of the conveyor body at a corresponding position. A storage device is fixedly connected to the upper end of the base. This utility model offers the advantages of convenient screening and recycling of substandard silicon waste, protection of the conveyor's internal structure from damage, simple device design, and low-cost installation.

Description

Technical Field

[0001] This utility model relates to the field of silicon waste refining and processing technology, specifically to a spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste. Background Technology

[0002] In the semiconductor industry, the purity requirements for silicon materials are extremely high. The spiral feeding device for remelting and refining silicon waste in a medium-frequency electric furnace provides stable and precise feeding assurance for the production of high-purity semiconductor-grade silicon, helping to improve the purity and quality of silicon materials and meet the needs of high-end fields such as semiconductor chip manufacturing. The solar photovoltaic industry is one of the main application areas for silicon materials. The production of solar cells requires a large amount of high-purity silicon material. The spiral feeding device can be applied to the remelting and refining process of silicon waste, improving the recycling rate of silicon materials, reducing production costs, ensuring product quality, and promoting the sustainable development of the solar photovoltaic industry.

[0003] In the existing technology, during the recycling and processing of silicon waste, the silicon waste is fed into the electric furnace for melting using a screw conveyor. However, due to the high hardness of the silicon waste, the material entering the conveyor in order to completely crush it is prone to causing internal damage. Therefore, we propose a screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste. Utility Model Content

[0004] The purpose of this invention is to provide a spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste, so as to solve the problems existing in the prior art mentioned in the background.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste includes a base, an electric furnace body fixedly connected to the upper end of the base, a conveyor body arranged above the base, multiple fixed frames fixedly connected to the side wall of the conveyor body, the lower ends of the multiple fixed frames being connected to the base via columns, a control box arranged on one side of the conveyor body, a feed cylinder connected to the inlet of the conveyor body, a feeding device fixedly connected to the upper end of the feed cylinder, a pushing device arranged on one side of the conveyor body at a corresponding position, and a storage device fixedly connected to the upper end of the base.

[0007] Preferably, the feeding device includes a feeding plate fixedly connected to the upper end of the feeding cylinder, a material trough is provided through the feeding plate, the material trough and the feeding cylinder are connected to each other through a conveying trough, a filter plate is fixedly connected to the opening of the conveying trough, and a plurality of filter holes are provided through the filter plate.

[0008] Preferably, the pushing device includes a hydraulic rod disposed on one side of the conveyor body, a connecting rod fixedly connected to the side wall of one of the fixed frames, the hydraulic rod being fixedly connected to the connecting rod, and a push plate being fixedly connected to the extended end of the hydraulic rod.

[0009] Preferably, the storage device includes a device base fixedly connected to the upper end of the base. A groove is provided through the side wall of the device base, and a collection frame is slidably connected in the groove. A slide plate is fixedly connected to the upper end of the device base. Another groove is provided through the slide plate. The inner bottom of the groove is connected to the groove in the device base through a feeding groove. The other end of the slide plate is mated to the side wall of the feeding cylinder. An opening is provided through the side wall of the feeding plate at the corresponding position. The slide plate and the base maintain a 20-degree angle.

[0010] Preferably, the filter plate is completely flush with the opening of the trough.

[0011] Preferably, a handle is fixedly connected to the side wall of the collection frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, by setting up a feeding device, a pushing device, and a storage device in cooperation, and designing an additional screening at the feeding cylinder, unqualified silicon waste is blocked by the filter plate. The push plate on one side can periodically push it away and let it fall into the chute on the slide plate through the opening. Finally, it slides down the discharge chute into the collection frame in the device base for collection. This can prevent excessive silicon waste from affecting the internal structure of the screw conveyor. The device is simple in design and can be added to the existing screw conveyor, reducing cost investment. It is worth promoting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the feed cylinder structure of a spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste proposed in this utility model;

[0016] Figure 3 This is a side view of the device base of a spiral feeding device for medium-frequency electric furnace remelting and refining silicon waste proposed in this utility model.

[0017] In the diagram: 1. Base, 2. Electric furnace body, 3. Column, 4. Conveyor body, 5. Fixing frame, 6. Hydraulic rod, 7. Connecting rod, 8. Push plate, 9. Feed plate, 10. Slide plate, 11. Device base, 12. Control box, 13. Feed cylinder, 14. Filter plate, 15. Collection frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-3 A spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste includes a base 1, which is welded from high-strength steel plate and can effectively support the operation of the entire equipment. The upper end of the base 1 is fixedly connected to the electric furnace body 2, and a conveyor body 4 is installed above the base 1. The conveyor body 4 is made of 304 stainless steel, which has excellent corrosion resistance. Multiple fixing brackets 5 are fixedly connected to the side wall of the conveyor body 4, and the fixing brackets 5 are bolted together to ensure stability. The lower ends of the multiple fixing brackets 5 are connected to the base 1 via columns 3, which are heat-treated to have excellent mechanical strength. A control box 12 is installed on one side of the conveyor body 4. The control box 12 is equipped with an intelligent PLC control system, which can realize automated operation. A feed cylinder 13 is connected to the inlet of the conveyor body 4. The inner wall of the feed cylinder 13 is polished to reduce material adhesion. A feeding device is fixedly connected to the upper end of the feed cylinder 13. The feeding device adopts a modular design for easy maintenance and replacement. The feeding device includes a feed plate 9 fixedly connected to the upper end of the feed cylinder 13. The surface of the feed plate 9 is coated with a wear-resistant coating to extend its service life. A material trough is installed through the feed plate 9, and the size of the trough is precisely calculated to ensure uniform material feeding. The material trough and the feed cylinder 13 are interconnected by a conveying trough, which adopts an arc transition design to prevent material blockage. A filter plate 14 is fixedly connected to the opening of the conveying trough. The filter plate 14 is made of titanium alloy, which combines strength and corrosion resistance. Multiple filter holes are installed through the filter plate 14, with a diameter of 5mm, which can effectively screen qualified materials.

[0020] A pushing device is installed on one side of the conveyor body 4 at the corresponding location. The pushing device is hydraulically driven and can generate a thrust of up to 2000N. The pushing device includes a hydraulic rod 6 located on one side of the conveyor body 4. The hydraulic rod 6 is equipped with a buffer device for smoother operation. A connecting rod 7 is fixedly connected to the side wall of one of the fixed frames 5. The connecting rod 7 has undergone dynamic balancing testing to ensure vibration-free operation. The hydraulic rod 6 is fixedly connected to the connecting rod 7, and the connection is secured with a flange to enhance structural stability. A push plate 8 is fixedly connected to the extended end of the hydraulic rod 6. The edge of the push plate 8 is covered with a rubber strip to prevent damage to the conveyor belt.

[0021] Specifically, a storage device with a capacity of up to 500L is fixedly connected to the upper end of the base 1 to meet the needs of continuous production. The storage device includes a device base 11 fixedly connected to the upper end of the base 1. The device base 11 has a guide rail inside for easy pulling of the collection frame. A sliding groove is provided through the side wall of the device base 11, with a linear bearing embedded in the groove to reduce frictional resistance. A collection frame 15 is slidably connected within the groove. The collection frame 15 adopts a mesh structure design for easy heat dissipation and chip removal. A handle is fixedly connected to the side wall of the collection frame 15, with a non-slip texture on the handle surface for easy operation. A sliding plate 10 is fixedly connected to the upper end of the device base 11. The tilt angle of the sliding plate 10 is optimized by fluid dynamics calculations to improve material flow. Another sliding groove with a width of 80mm is provided through the sliding plate 10 to accommodate materials of different particle sizes. The inner bottom of the sliding groove communicates with the sliding groove inside the device base 11 through a feeding trough, which is equipped with a vibrator to prevent material accumulation. The other end of the slide plate 10 is connected to the side wall of the feed cylinder 13, and the connection is sealed with a sealing strip to prevent dust leakage. An opening is provided through the side wall of the feed plate 9 at the corresponding position, and the edges of the opening are chamfered to ensure safety. The slide plate 10 maintains a 20-degree angle with the base 1; this angle has been verified through multiple tests to achieve optimal conveying performance.

[0022] It is worth mentioning that the filter plate 14 is completely flush with the opening of the material trough. This design ensures uniform material filtration, improves product quality consistency, and prevents the push plate 8 from being blocked by the protrusion of the filter plate 14 when it is displaced.

[0023] In this invention, during the normal feeding process of the conveyor body 4 into the electric furnace body 2, the silicon waste enters the conveyor body 4 through the feed plate 9 and the feed cylinder 13 and is transported into the electric furnace body 2 for smelting. Unqualified silicon waste is blocked by the filter plate 14. The push plate 8 on one side can push the unqualified silicon waste away through the periodic displacement of the hydraulic rod 6 and drop it into the chute on the slide plate 10 through the opening. Finally, it slides down the discharge chute into the collection frame 15 in the device base 11 for collection. This can prevent excessive silicon waste from affecting the internal structure of the screw conveyor.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spiral feeding device for medium-frequency electric furnace remelting and refining of silicon waste, comprising a base (1), characterized in that, An electric furnace body (2) is fixedly connected to the upper end of the base (1). A conveyor body (4) is set above the base (1). Multiple fixed frames (5) are fixedly connected to the side wall of the conveyor body (4). The lower ends of the multiple fixed frames (5) are connected to the base (1) through columns (3). A control box (12) is set on one side of the conveyor body (4). A feed cylinder (13) is connected to the inlet of the conveyor body (4). A feeding device is fixedly connected to the upper end of the feed cylinder (13). A pushing device is set on one side of the conveyor body (4) at the corresponding position. A storage device is fixedly connected to the upper end of the base (1).

2. The screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste according to claim 1, characterized in that, The feeding device includes a feeding plate (9) fixedly connected to the upper end of the feeding cylinder (13). A material trough is provided through the feeding plate (9). The material trough and the feeding cylinder (13) are connected to each other through a conveying trough. A filter plate (14) is fixedly connected at the opening of the conveying trough. Multiple filter holes are provided through the filter plate (14).

3. The screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste according to claim 1, characterized in that, The pushing device includes a hydraulic rod (6) located on one side of the conveyor body (4), a connecting rod (7) is fixedly connected to the side wall of one of the fixed frames (5), the hydraulic rod (6) is fixedly connected to the connecting rod (7), and a push plate (8) is fixedly connected to the extended end of the hydraulic rod (6).

4. The screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste according to claim 2, characterized in that, The storage device includes a device base (11) fixedly connected to the upper end of the base (1). A groove is provided through the side wall of the device base (11). A collection frame (15) is slidably connected in the groove. A slide plate (10) is fixedly connected to the upper end of the device base (11). Another groove is provided through the slide plate (10). The bottom of the groove is connected to the groove in the device base (11) through a feeding groove. The other end of the slide plate (10) is connected to the side wall of the feeding cylinder (13). An opening is provided through the side wall of the feeding plate (9) at the corresponding position. The slide plate (10) and the base (1) maintain a 20-degree angle.

5. The screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste according to claim 2, characterized in that, The filter plate (14) is completely flush with the opening of the trough.

6. The screw feeding device for medium-frequency electric furnace remelting and refining of silicon waste according to claim 4, characterized in that, A handle is fixedly connected to the side wall of the collection box (15).

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