Silicon metal semi-finished product oxygen introduction refining device

Abstract

The utility model discloses a metal silicon semi-finished product oxygen introduction refining device, which comprises a refining tank and a filter box, a plurality of connecting pipes are inserted at equal intervals on one side of the refining tank and on the outer side of each connecting hole, a gas guide pipe is fixedly arranged at one end of each connecting pipe, and a first sealing valve is rotatably arranged on one side of the outer wall of each gas guide pipe. A plurality of supporting discs are fixedly arranged in the refining tank at equal intervals, a through groove is formed in the top end of each supporting disc, a stirring impeller is rotationally arranged on the inner wall of each through groove, and an arc-shaped guide pipe is arranged between every two supporting discs. According to the utility model, a silicon solution is supported by the supporting disc and then flows down through the through groove, the stirring impeller is rotated to stir and flap the silicon solution when the silicon solution passes through the through groove, so that the silicon solution is in full contact with oxygen, and meanwhile, the staying time of the metal silicon solution in the refining tank is prolonged under the buffering type flow guide of the arc-shaped guide pipe, so that the metal silicon solution can be in contact reaction with the oxygen for a longer time; the refining effect of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal silicon purification, in particular to an oxygen-refining device for semi-finished metal silicon products. Background Art

[0002] Metallic silicon, also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-ferrous alloys. Metallic silicon is a product smelted from quartz and coke in an electric furnace. The content of the main component silicon element is about 98% (in recent years, 99.99% Si content is also included in metallic silicon), and the remaining impurities are iron, aluminum, calcium, etc. In the modern industrial production process, the semi-finished metallic silicon solution still needs to be further refined and purified to make the purity of the obtained crystalline silicon higher. In the process of refining and purifying the semi-finished metallic silicon, this type of oxygen refining device plays a very important role.

[0003] In view of this, Chinese Patent No. CN215756467U proposes an oxygen refining device for semi-finished metal silicon. In the utility model, the upper solution and the lower solution inside the refining shell can be fully mixed through the cooperation between the three stirring knives in the mixing assembly, which will make the oxygen content of each solution inside the refining shell close when oxygen is injected into the air inlet pipe, and keep its oxidation reaction efficiency the same. Compared with the oxygen refining device for semi-finished metal silicon in the prior art, the oxygen refining effect of the semi-finished metal silicon is improved, which is conducive to the use of the oxygen refining device for semi-finished metal silicon. However, for the oxygen reaction purification method in the above technical scheme, although the oxygen and the metal silicon solution are better contacted and fused by stirring, the direction of the solution flowing down in the equipment is vertical, and the stirring of the stirring structure can slow down the descent speed, but its descent speed will still cause the oxygen to not have time to contact and react with the solution, resulting in poor refining effect. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide an oxygen refining device for semi-finished metallic silicon to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model proposes an oxygen refining device for semi-finished metal silicon, comprising a refining tank and a filter box, wherein a buffered gas-liquid contact fusion mechanism is arranged inside the refining tank, and a filter mechanism for conveniently collecting impurities is arranged inside the filter box;

[0006] The buffered gas-liquid contact fusion mechanism comprises a plurality of connecting holes equidistantly provided on one side of the refining tank, a plurality of connecting pipes equidistantly interspersed on the outside of each connecting hole on one side of the refining tank, an air guide pipe fixedly provided at one end of each connecting pipe, a first sealing valve rotatably provided on one side of the outer wall of the air guide pipe, a plurality of supporting plates equidistantly fixedly provided inside the refining tank, a through groove provided at the top of each supporting plate, a stirring impeller rotatably provided on the inner wall of each through groove, an arc-shaped conduit provided between each of the supporting plates, and the inner walls at both ends of each arc-shaped conduit are respectively connected to the inner wall of each through groove.

[0007] In one example, the bottom of the refining tank is fixedly connected to the top of the filter box, and a second sealing valve is rotatably provided on one side of the top of the filter box.

[0008] In one example, the filtering mechanism for conveniently collecting impurities includes an annular partition fixed to the inner wall of the filter box, and a docking tube is inserted into one side of the annular partition.

[0009] In one example, one end of the butt joint pipe passes through the top of the filter box and is connected to the bottom of the refining tank, and a support ring is fixedly provided on one side of the annular partition and one side of the inner wall of the filter box.

[0010] In one example, a liquid outlet groove is inserted at the lower end of one side of the outer wall of the filter box, and limiting grooves are provided in the middle positions of both sides of the inner wall of the liquid outlet groove, and a filter plate is inserted between the inner walls of the two limiting grooves.

[0011] In one example, arc-shaped cover plates are inserted on both sides of the top of the filter box, and the bottoms of the two arc-shaped cover plates are respectively in contact with the tops of the two support rings, and a liquid inlet funnel is inserted on the top of the refining tank.

[0012] The oxygen refining device for semi-finished metal silicon proposed by the utility model can bring the following beneficial effects:

[0013] 1. This is a device for refining semi-finished metal silicon through oxygen. The silicon solution is supported by a support plate and then flows down through a through slot. When passing through the through slot, a stirring impeller is rotated to stir and beat the silicon solution so that it is fully in contact with oxygen. At the same time, the buffering diversion of the arc-shaped conduit prolongs the time that the metal silicon solution stays in the refining tank, so that it can have a longer contact reaction with oxygen, thereby improving the refining effect of the device.

[0014] 2. The oxygen refining device for metallic silicon semi-finished products opens the second sealing valve to guide it into the interior of the filter box through the docking pipe, and is located on the outside of the annular partition, and is made to flow to the liquid outlet tank. Impurities are intercepted by filtering through the filter plate on the liquid outlet tank, and the refined and purified metallic silicon solution is discharged and collected. Later, the filter plate is pulled out of the limit groove, and the arc cover plate is taken out from the support ring. The residual impurities are cleaned on the outside of the annular partition, and they can be pushed into the liquid outlet tank for cleaning, which is convenient for filtering and collection during later refining and improves the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure inside the refining tank of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the adjacent support plates connected as a whole in the utility model;

[0019] Figure 4 This is a schematic diagram of the structure inside the filter box of the utility model;

[0020] Figure 5 This utility model manual is attached Figure 4 Schematic diagram of the structure enlarged at point A in the middle.

[0021] In the figure: 1. refining tank; 2. connecting hole; 3. connecting pipe; 4. air guide pipe; 5. first sealing valve; 6. support plate; 7. through groove; 8. stirring impeller; 9. arc-shaped duct; 10. filter box; 11. second sealing valve; 12. annular partition; 13. butt joint; 14. support ring; 15. liquid outlet groove; 16. limit groove; 17. filter plate; 18. arc-shaped cover plate; 19. liquid inlet funnel. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the utility model, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0023] The examples are as follows:

[0024] The utility model provides Figure 1-5 The device for refining semi-finished metal silicon through oxygen shown in the figure comprises a refining tank 1 and a filter box 10, wherein a buffer-type gas-liquid contact fusion mechanism is arranged inside the refining tank 1;

[0025] The buffer type gas-liquid contact fusion mechanism comprises a plurality of connection holes 2 which are equidistantly provided on one side of the refining tank 1, a plurality of connection pipes 3 are equidistantly interspersed on the outside of each connection hole 2 on one side of the refining tank 1, an air guide pipe 4 is fixedly provided at one end of each connection pipe 3, a first sealing valve 5 is rotatably provided on one side of the outer wall of the air guide pipe 4, a plurality of support plates 6 are equidistantly fixedly provided inside the refining tank 1, a through groove 7 is provided at the top of each support plate 6, a stirring impeller 8 is rotatably provided on the inner wall of each through groove 7, an arc-shaped conduit 9 is provided between each support plate 6, and the inner walls at both ends of each arc-shaped conduit 9 are respectively connected with the inner wall of each through groove 7, and the amount of oxygen entering can be controlled by the first sealing valve 5, and a connection hole 2 is provided between every two adjacent support plates 6, oxygen is injected into it through the connection pipe 3, so that it can fully contact and react with the solution flowing down by the buffer, and each connection pipe 3 is inclined upward, so that the solution will not flow into the connection pipe 3 and be damaged by high temperature;

[0026] Furthermore, the bottom of the refining tank 1 is fixedly connected to the top of the filter box 10, and a second sealing valve 11 is rotatably provided on one side of the top of the filter box 10;

[0027] Furthermore, the filtering mechanism for conveniently collecting impurities includes an annular partition 12 fixed to the inner wall of the filter box 10, and a docking tube 13 is inserted into one side of the annular partition 12. The filter box 10 is located between the annular partition 12 and its inner wall and is in an open state, and two arc-shaped cover plates 18 are clamped therein and supported by a support ring 14.

[0028] One end of the butt joint 13 passes through the top of the filter box 10 and is connected to the bottom of the refining tank 1 . A support ring 14 is fixedly provided on one side of the annular partition 12 and one side of the inner wall of the filter box 10 .

[0029] A liquid outlet groove 15 is inserted at the lower end of one side of the outer wall of the filter box 10 , and limiting grooves 16 are provided in the middle positions of both sides of the inner wall of the liquid outlet groove 15 , and a filter plate 17 is inserted between the inner walls of the two limiting grooves 16 .

[0030] Arc-shaped cover plates 18 are inserted on both sides of the top of the filter box 10, and the bottoms of the two arc-shaped cover plates 18 are respectively in contact with the tops of the two support rings 14, and a liquid inlet funnel 19 is inserted on the top of the refining tank 1, and the interior of the filter box 10 is located at one end of the liquid outlet trough 15, and the horizontal plane of the bottom of the inner wall is lower than other areas, so as to facilitate the flow and discharge of the solution.

[0031] Working principle: When using the oxygen refining device for semi-finished metallic silicon in the present design, it is first necessary to dock the refining tank 1 with the filter box 10 at the bottom, so that the docking pipe 13 passes through the filter box 10 and is connected to the bottom of the refining tank 1, and the semi-finished metallic silicon solution is injected into the refining tank 1 through the liquid inlet funnel 19, so that it falls on the uppermost support plate 6, and then flows from the through groove 7 on the support plate 6 to the arc-shaped conduit 9 to the support plate 6 adjacent to the lower end. When passing through each through groove 7, the metallic silicon solution will hit the stirring impeller 8 therein to make it rotate continuously in the through groove 7, thereby stirring and beating the solution. At this time, oxygen is poured into each connecting pipe 3 respectively through the air guide pipe 4, and then introduced into the refining tank 1 through each connecting hole 2 to contact and react with the solution therein. Since the solution can be fully mixed with oxygen under the stirring and beating of the stirring impeller 8, at the same time, the arc-shaped conduit 9 and the stirring impeller 8 The coordinated buffer flow reduces the falling speed of the solution, allowing it to have sufficient time to contact with oxygen, thereby increasing the reaction amount of impurities therein and allowing the metallic silicon semi-finished product to be more fully refined, thereby improving the refining effect of the device. The metallic silicon solution after the reaction gathers at the bottom of the refining tank 1, and the second sealing valve 11 is opened to introduce it into the interior of the filter box 10 through the docking pipe 13, and is located on the outside of the annular partition 12, and is made to flow to the liquid outlet trough 15. Impurities are intercepted by filtering through the filter plate 17 on the liquid outlet trough 15, and the refined and purified metallic silicon solution is discharged and collected. Later, the filter plate 17 is pulled out of the limit groove 16, and the arc cover plate 18 is taken out of the support ring 14. The residual impurities are cleaned on the outside of the annular partition 12, so that they can be pushed into the liquid outlet trough 15 for cleaning, which is convenient for filtering and collection during later refining and improves the convenience of using the device.

[0032] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0033] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A device for refining semi-finished metallic silicon by oxygen, comprising a refining tank (1) and a filter box (10), characterized in that: The refining tank (1) is provided with a buffer-type gas-liquid contact fusion mechanism inside, and the filter box (10) is provided with a filter mechanism for conveniently collecting impurities inside; The buffer-type gas-liquid contact fusion mechanism comprises a plurality of connection holes (2) equidistantly arranged on one side of a refining tank (1); a plurality of connection pipes (3) are equidistantly arranged on the outside of each connection hole (2) on one side of the refining tank (1); an air guide pipe (4) is fixedly arranged at one end of each connection pipe (3); a first sealing valve (5) is rotatably arranged on one side of the outer wall of the air guide pipe (4); a plurality of support plates (6) are equidistantly fixedly arranged inside the refining tank (1); a through groove (7) is arranged at the top of each support plate (6); a stirring impeller (8) is rotatably arranged on the inner wall of each through groove (7); an arc-shaped conduit (9) is arranged between each support plate (6); and the inner walls at both ends of each arc-shaped conduit (9) are respectively connected to the inner wall of each through groove (7).

2. The oxygen refining device for metallic silicon semi-finished products according to claim 1, characterized in that: The bottom of the refining tank (1) is fixedly connected to the top of the filter box (10), and a second sealing valve (11) is rotatably provided on one side of the top of the filter box (10).

3. The oxygen refining device for semi-finished metallic silicon according to claim 1, characterized in that: The filtering mechanism for conveniently collecting impurities comprises an annular partition (12) fixed to the inner wall of the filter box (10), and a butt joint (13) is inserted through one side of the annular partition (12).

4. The oxygen refining device for metallic silicon semi-finished products according to claim 3, characterized in that: One end of the butt joint pipe (13) passes through the top of the filter box (10) and is connected to the bottom of the refining tank (1), and a support ring (14) is fixedly provided on one side of the annular partition plate (12) and one side of the inner wall of the filter box (10).

5. The oxygen refining device for metallic silicon semi-finished products according to claim 1, characterized in that: A liquid outlet groove (15) is inserted at the lower end of one side of the outer wall of the filter box (10), and limiting grooves (16) are provided at the middle positions of both sides of the inner wall of the liquid outlet groove (15), and a filter plate (17) is inserted between the inner walls of the two limiting grooves (16).

6. The oxygen refining device for metallic silicon semi-finished products according to claim 4, characterized in that: Arc-shaped cover plates (18) are inserted on both sides of the top of the filter box (10), and the bottoms of the two arc-shaped cover plates (18) are respectively in contact with the tops of the two support rings (14), and a liquid inlet funnel (19) is inserted on the top of the refining tank (1).

Images