A device for purifying by-product microsilica powder

Abstract

The utility model discloses a byproduct microsilica purification preparation device, including pickling bucket and bucket cover, be equipped with screening board and screening hole in pickling bucket, be equipped with screening motor on the bucket cover, be equipped with screening rod and screening scraper on screening motor, the bottom of pickling bucket is equipped with drive cylinder, the output of drive cylinder is equipped with piston rod, be equipped with stirring sleeve on piston rod, be equipped with baffle and stirring board fixedly on stirring sleeve, be equipped with rotating ring on piston rod, be provided with rotating groove on stirring sleeve, drive screening rod and screening scraper to rotate through screening motor, carry out the scattering screening of the caked raw material through the screening hole on the screening board, improve the contact and reaction effect of raw material and acid solution, drive stirring sleeve to move in the vertical direction through drive cylinder, drive baffle and stirring board to rotate, and then drive the acid solution in the bottom of pickling bucket to drain to the upper, carry out the sufficient mixing of silica powder and acid solution, improve the reaction and purification effect.

Description

Technical Field

[0001] This utility model relates to the field of silicon powder purification technology, and more specifically, it relates to a device for purifying and preparing by-product micro silicon powder. Background Technology

[0002] Microsilica (also known as silica fume) is a byproduct generated during the production processes of metallurgy, ferrosilicon alloys, and polycrystalline silicon. It is mainly formed by the agglomeration of gaseous SiO2, with a particle size typically between 0.1-1μm. It has a high specific surface area (15-30m2 / g) and strong activity. Although microsilica has a wide range of applications in concrete, refractory materials, and other fields, its original state often contains metallic impurities (Fe, Al, etc.), unreacted carbon particles, and free SiO2 agglomerates. It needs to be purified to meet the requirements of high-value-added applications (such as electronic-grade silicon materials and silicon-carbon anode materials).

[0003] In existing technologies, hydrochloric acid (HCl) or hydrofluoric acid (HF) is used to dissolve metal oxides for purification. When using existing mixing devices for purifying microsilica powder, the raw materials are placed in the pickling tank in a concentrated manner, which easily causes the raw materials to clump together, increases the workload of the stirring components, and reduces the mixing efficiency. At the same time, the mixing of silica powder and acidic solution is insufficient, which can easily lead to local over-washing or unreacted areas, affecting the pickling effect. In addition, the pH value of the acidic solution needs to be detected before and after the pickling process. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the problems existing in the prior art, this utility model provides a device for purifying and preparing by-product microsilica powder, thereby solving the technical problem of insufficient mixing of acidic solutions mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a byproduct microsilica powder purification and preparation device, comprising an acid washing tank and a tank lid, wherein a sieve plate is provided inside the acid washing tank, the sieve plate is provided with sieve holes, a sieve motor is provided on the tank lid, a sieve rod is provided on the sieve motor, a sieve scraper is provided on the sieve rod, a drive cylinder is provided at the bottom of the acid washing tank, a piston rod is provided at the output end of the drive cylinder, a stirring sleeve is provided on the piston rod, a guide plate is fixedly provided circumferentially at the bottom of the stirring sleeve, a stirring plate is fixedly provided circumferentially at the top of the stirring sleeve, a rotating ring is provided on the piston rod, and a rotating groove that cooperates with the rotating ring is provided on the stirring sleeve.

[0008] The present invention is further configured such that a linear sealing bearing is provided between the piston rod and the pickling tank, which improves the sealing performance and smooth movement between the piston rod and the pickling tank.

[0009] The present invention is further configured such that the pickling tank is provided with an inlet pipe and an outlet pipe, which facilitates the addition and discharge of pickling solution.

[0010] The present invention is further configured such that the barrel lid is provided with a feed pipe, and the feed pipe is provided with a plug to facilitate the addition of silicon powder raw materials, and the plug prevents the acidic solution gas produced by the reaction from flowing out through the feed pipe.

[0011] The present invention is further provided that the pickling tank is provided with a corrosion-resistant lining, which improves the service life of the pickling tank.

[0012] The present invention is further configured such that a water pump is provided on the bucket lid, one end of the water pump is connected to a detector, and the other end is connected to a detection tube. One end of the detection tube is provided with a sampling tube, which facilitates sampling and testing of the acidic solution.

[0013] The present invention is further configured such that a sampling motor is provided on the bucket lid, a sampling screw is provided on the motor shaft of the sampling motor, a sampling block is threadedly connected to the sampling screw, and the sampling tube is fixedly installed on the sampling block, so as to facilitate sampling of acidic solutions at different heights.

[0014] The present invention is further provided that the detection tube is provided with a detection hose, which facilitates the adjustment of the height and position of the sampling tube.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a device for purifying and preparing by-product microsilica powder, which has the following beneficial effects:

[0017] 1. The screening motor drives the screening rod and screening scraper to rotate, and the clumps of raw materials are broken up and screened through the screening holes on the screening plate, thereby improving the contact and reaction effect between the raw materials and the acidic solution.

[0018] 2. The stirring sleeve is moved vertically by the driving cylinder, which in turn drives the guide plate and stirring plate to rotate. This causes the acidic solution at the bottom of the pickling tank to flow upward, so as to fully mix the silicon powder and the acidic solution and improve the reaction and purification effect.

[0019] 3. The sampling screw is driven by the sampling motor to rotate, which in turn drives the sampling block to move vertically, thereby driving the sampling tube to move vertically. The acid solution is sampled and tested through the sampling tube, ensuring that the solution in the pickling tank is in a suitable state. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of a byproduct microsilica powder purification and preparation device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the pickling tank in this utility model;

[0022] Figure 3 This is a schematic diagram of the assembly structure of the piston rod, stirring sleeve, guide plate, and stirring plate in this utility model;

[0023] Figure 4 This is a schematic diagram of the cooperative structure of the water pump, detector, detection tube, sampling tube, sampling motor, sampling screw, sampling block and detection hose in this utility model;

[0024] Figure 5 This is a schematic diagram of the combined structure of the pickling tank and the corrosion-resistant lining in this utility model.

[0025] In the diagram: 1. Pickling tank; 2. Tank lid; 3. Screening plate; 4. Screening hole; 5. Screening motor; 6. Screening rod; 7. Screening scraper; 8. Drive cylinder; 9. Piston rod; 10. Stirring sleeve; 11. Guide plate; 12. Stirring plate; 13. Rotating ring; 14. Rotating groove; 15. Linear sealed bearing; 16. Water inlet pipe; 17. Water outlet pipe; 18. Feed pipe; 19. Plug; 20. Corrosion-resistant lining; 21. Water pump; 22. Detector; 23. Detection tube; 24. Sampling tube; 25. Sampling motor; 26. Sampling screw; 27. Sampling block; 28. Detection hose. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5A byproduct microsilica powder purification and preparation device includes an acid washing tank 1 and a tank cover 2. The acid washing tank 1 is equipped with a sieve plate 3 with sieve holes 4. The tank cover 2 is equipped with a sieve motor 5 with a sieve rod 6 and a sieve scraper 7. The bottom of the acid washing tank 1 is equipped with a drive cylinder 8 with a piston rod 9 at the output end. The piston rod 9 is equipped with a stirring sleeve 10. The bottom of the stirring sleeve 10 is circumferentially fixed with a guide plate 11, and the top of the stirring sleeve 10 is circumferentially fixed with a stirring plate 12. The piston rod 9 is equipped with a rotating ring 13, and the stirring sleeve 10 is provided with a rotating groove 14 that cooperates with the rotating ring 13. A linear sealing bearing 15 is provided between the piston rod 9 and the acid washing tank 1. The acid washing tank 1 is equipped with a water inlet pipe 16 and a water outlet pipe 17. The tank cover 2 is equipped with a feed pipe 18 with a plug 19.

[0030] In this embodiment, during use, water and acidic solution are added through the water inlet pipe 16, and silicon powder raw material is added through the feed pipe 18. The silicon powder raw material slides onto the screening plate 3. The screening motor 5 is started, which drives the screening rod 6 and the screening scraper 7 to rotate, breaking up and screening the agglomerated silicon powder raw material on the screening plate 3. Then, the feed pipe 18 is blocked through the plug 19 to prevent the waste gas generated by pickling from overflowing. Then, the drive cylinder 8 is started, which drives the piston rod 9 to move at the bottom of the pickling tank 1 through the linear sealing bearing 15. The linear sealing bearing 15 is made of stainless steel. The piston rod 9 drives the stirring sleeve 1. The stirring sleeve 10 moves vertically and rotates on the piston rod 9 under the guidance of the guide plate 11 and the cooperation of the rotating ring 13 and the rotating groove 14. Under the rotation of the guide plate 11 and the stirring plate 12, the stirring sleeve 10 drives the acid solution and silicon powder to be fully disturbed and mixed in the pickling tank 1, which improves the reaction and purification and impurity removal effect. The pickling tank 1 in this application only improves the stirring and feeding structure in the pickling tank 1. The acid waste gas treatment device, the acid solution subsequent recovery treatment device, and the purified silicon powder cleaning and drying device all adopt the existing technology.

[0031] Please see Figures 4-5 As one embodiment for detecting the pH value inside the pickling tank 1: The pickling tank 1 is equipped with a corrosion-resistant lining 20, and a water pump 21 is provided on the tank cover 2. One end of the water pump 21 is connected to a detector 22, and the other end is connected to a detection tube 23. One end of the detection tube 23 is equipped with a sampling tube 24. A sampling motor 25 is provided on the tank cover 2. A sampling screw 26 is provided on the motor shaft of the sampling motor 25. A sampling block 27 is threadedly connected to the sampling screw 26. The sampling tube 24 is fixedly installed on the sampling block 27. A detection hose 28 is provided on the detection tube 23.

[0032] More specifically, the corrosion-resistant lining 20 is made of Hastelloy and polytetrafluoroethylene. During the pickling process, when the acidity and alkalinity of the acidic solution are detected, the sampling motor 25 is started. The motor shaft of the sampling motor 25 drives the sampling screw 26 to rotate. The sampling screw 26 drives the sampling block 27 to rotate. The sampling height of the sampling tube 24 is adjusted by the sampling block 27. The water pump 21 is started, and the sample is taken through the detection tube 23. The acidic solution at different heights is detected by the detector 22. The detector 22 is an industrial-grade acidity and alkalinity detection instrument. This device is an existing finished product.

[0033] In summary, during the use or operation of the overall equipment: Water and acidic solution are added through the inlet pipe 16, and silicon powder is added through the feed pipe 18. The silicon powder slides onto the screening plate 3. The screening motor 5 is started, driving the screening rod 6 and the screening scraper 7 to rotate, breaking up and screening the agglomerated silicon powder on the screening plate 3. Then, the feed pipe 18 is blocked through the plug 19 to prevent the overflow of waste gas generated during pickling. Next, the drive cylinder 8 is started, driving the piston rod 9 to move at the bottom of the pickling tank 1 via the linear sealing bearing 15 (made of stainless steel). The piston rod 9 drives the agitator... The stirring sleeve 10 moves vertically. Under the guidance of the guide plate 11, the stirring sleeve 10 rotates on the piston rod 9 through the cooperation of the rotating ring 13 and the rotating groove 14. Under the rotation of the guide plate 11 and the stirring plate 12, the stirring sleeve 10 drives the acidic solution and silicon powder to fully agitate and mix in the pickling tank 1, which improves the reaction and purification effect. The pickling tank 1 in this application only improves the stirring and feeding structure in the pickling tank 1. The acidic waste gas treatment device, the acidic solution subsequent recovery treatment device, and the purified silicon powder cleaning and drying device all adopt existing technologies.

[0034] The corrosion-resistant lining 20 is made of Hastelloy and polytetrafluoroethylene. During the pickling process, when the acidity and alkalinity of the acid solution are detected, the sampling motor 25 is started. The motor shaft of the sampling motor 25 drives the sampling screw 26 to rotate. The sampling screw 26 drives the sampling block 27 to rotate. The sampling height of the sampling tube 24 is adjusted by the sampling block 27. The water pump 21 is started, and the sample is taken through the detection tube 23. The acid solution at different heights is detected by the detector 22. The detector 22 is an industrial-grade acidity and alkalinity detection instrument. This device is an existing finished product.

[0035] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0036] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0037] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here.

[0038] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

Claims

1. A device for purifying and preparing by-product microsilica powder, comprising an acid washing bucket (1) and a bucket cover (2), characterized in that: The pickling tank (1) is equipped with a screening plate (3), the screening plate (3) is equipped with screening holes (4), the tank cover (2) is equipped with a screening motor (5), the screening motor (5) is equipped with a screening rod (6), the screening rod (6) is equipped with a screening scraper (7), the bottom of the pickling tank (1) is equipped with a driving cylinder (8), the output end of the driving cylinder (8) is equipped with a piston rod (9), the piston rod (9) is equipped with a stirring sleeve (10), the bottom of the stirring sleeve (10) is circumferentially fixed with a guide plate (11), the top of the stirring sleeve (10) is circumferentially fixed with a stirring plate (12), the piston rod (9) is equipped with a rotating ring (13), and the stirring sleeve (10) is equipped with a rotating groove (14) that cooperates with the rotating ring (13).

2. The device for purifying and preparing by-product microsilica according to claim 1, characterized in that: A linear sealed bearing (15) is provided between the piston rod (9) and the pickling tank (1).

3. The device for purifying and preparing by-product microsilica according to claim 1, characterized in that: The pickling tank (1) is equipped with an inlet pipe (16) and an outlet pipe (17).

4. The device for purifying and preparing by-product microsilica according to claim 1, characterized in that: The barrel lid (2) is provided with a feed pipe (18), and the feed pipe (18) is provided with a plug (19).

5. The device for purifying and preparing byproduct microsilica according to claim 1, characterized in that it comprises: The pickling tank (1) is equipped with a corrosion-resistant lining (20).

6. The device for purifying and preparing byproduct microsilica according to claim 1, characterized in that it comprises: The bucket lid (2) is equipped with a water pump (21), one end of which is connected to a detector (22), and the other end is connected to a detection tube (23). One end of the detection tube (23) is equipped with a sampling tube (24).

7. The device for purifying and preparing by-product microsilica according to claim 6, characterized in that it comprises: The barrel lid (2) is provided with a sampling motor (25), the motor shaft of the sampling motor (25) is provided with a sampling screw (26), the sampling screw (26) is threadedly connected with a sampling block (27), and the sampling tube (24) is fixedly installed on the sampling block (27).

8. The device for purifying and preparing by-product microsilica according to claim 7, characterized in that: The detection tube (23) is equipped with a detection hose (28).

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