A kind of air flow pulverizing system and method for processing crystalline silicon dioxide

Abstract

The present invention discloses an air flow pulverizing system and method for processing crystalline silicon dioxide, comprising an air flow pulverizer, a primary grading component, a secondary grading component and two cyclone separators, the air flow pulverizer is connected to the primary grading component, the primary grading component comprises a fixed bin, a replacement column and a plurality of grading wheels, the fixed bin has an installation cavity and a discharge channel, the replacement column can be axially rotatably installed in the installation cavity, the replacement column comprises a cylindrical main part and an adjusting rod, the cylindrical main part has a plurality of placement cavities arranged symmetrically around the circumference, a grading wheel can be vertically placed in each placement cavity, the grading wheel can be axially rotated by a driving motor, the secondary grading component comprises two clamping plates, a rotating screen plate and a blowback motor, the clamping plates are butt-jointed to form a grading cavity, the rotating screen plate is installed in the grading cavity, two through pipes are symmetrically installed on each clamping plate, the through pipes are respectively connected to the primary grading component, the blowback motor and the cyclone separator.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon dioxide processing, and in particular to an air flow pulverizing system and method for processing crystalline silicon dioxide. Background Art

[0002] Crystalline silica is a commonly used functional filling material for electronic communications. It has excellent electrical insulation and high reliability. It can be used as a chip packaging material, a high-frequency and high-speed copper-clad laminate functional filling material for 5G, or a thermally conductive interface material. Chips encapsulated with crystalline silica have good insulation and high reliability. As a functional filling material for copper plates, it can achieve high-frequency, high-speed, low-latency, low-loss, and highly reliable signal transmission. It can also improve the heat resistance and heat dissipation performance of electronic products, achieve effective thermal management, and improve the reliability of electronic products.

[0003] Crystalline silica is made from natural quartz sand through processes such as impurity removal, classification, and airflow crushing. The airflow crusher crushes the pretreated raw materials and then transports the mixed powder to the classification wheel. The particles with larger diameters will be screened by the classification wheel and returned to the airflow crusher for crushing, while the particles with smaller diameters will enter the cyclone separator for solid-gas separation to obtain the final product.

[0004] If you want to change the diameter of the product screened by the classifying wheel, you can change the speed of the classifying wheel, but the speed of the classifying wheel can only be adjusted within a certain range, and sometimes the speed adjustment range of the classifying wheel cannot meet the required change in product diameter. At this time, the classifying wheel can only be replaced to produce products of the required diameter. When replacing the classifying wheel, the entire air flow crushing system needs to stop working, which will affect the continuity and efficiency of the system production.

[0005] In addition, the grading wheel can only screen out particles with larger diameters, and small particles will be mixed in the product and cannot be separated. When the diameter of the required crystalline silica product is within a fixed range, the existing equipment cannot meet actual production needs. Summary of the invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a gas flow pulverizing system and method for processing crystalline silicon dioxide.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A gas flow pulverizing system and method for processing crystalline silicon dioxide, comprising a gas flow pulverizer, a primary classification component, a secondary classification component and two cyclone separators, the gas flow pulverizer is connected to the primary classification component, the primary classification component comprises a fixed bin, a switching column and a plurality of classification wheels, the fixed bin has a mounting cavity and a discharge channel, the gas flow pulverizer is connected to the mounting cavity, the discharge channel is connected to the mounting cavity, the switching column can be axially rotatably mounted in the mounting cavity, the switching column comprises a cylindrical main part and an adjusting rod, the cylindrical main part has a plurality of placement cavities arranged symmetrically around the circumference, the outer peripheral wall of the cylindrical main part has a side discharge port connecting each placement cavity with the outside, a classification wheel can be vertically placed in each placement cavity, and the classification wheel can be axially rotated by being driven by a driving motor;

[0009] The secondary grading assembly includes two clamping plates, a rotating screen plate and a back-blowing motor. The clamping plates are butt-jointed to form a grading chamber. The rotating screen plate is installed in the grading chamber. Two through pipes are symmetrically installed on each clamping plate. The through pipes are respectively connected to the primary grading assembly, the back-blowing motor and the cyclone separator.

[0010] Preferably, the placement cavity passes through the exchange column from top to bottom, a lining ring is provided at the lower part of the placement cavity, and the grading wheel is placed on the lining ring.

[0011] Preferably, each placement cavity and the channel into which the adjusting rod is inserted are connected by a connecting channel, a connecting rod is provided in the connecting channel, and the adjusting rod is connected to the lining ring through the connecting rod.

[0012] Preferably, the upper end of the fixed bin is covered with a cover plate, the transmission shaft of the drive motor passes through the cover plate and extends into the installation cavity, and the upper end of the grading wheel is provided with a docking sleeve corresponding to the transmission shaft of the drive motor.

[0013] Preferably, the bottom end of the adjusting rod is connected to the bottom plate of the cylindrical main part via a lifting spring.

[0014] Preferably, the inner space of the rotating screen plate is divided into a plurality of screening areas by a plurality of concentrically arranged isolation rings, each screening area is covered with a fine screen, and the aperture of the screen in each screening area is different.

[0015] Preferably, the two clamping plates are symmetrically provided with a pair of vertically extending adjustment rails, which extend in radial directions and cover various screening areas of the rotating screen plate.

[0016] Preferably, a sliding sealing block is movably installed in the adjusting guide rail, the through pipe passes through the sliding sealing block, a plurality of sealing baffles are laterally inserted into the adjusting guide rail, the sealing baffles can move horizontally, and one end of the sealing baffle can be inserted into the adjusting guide rail.

[0017] A method for using a gas flow pulverizing system for processing crystalline silicon dioxide comprises the following steps:

[0018] S1: The material is injected into the air flow mill for preliminary crushing, and the mixed coarse product after crushing is transported to the primary classification component through the discharge pipe;

[0019] S2: Press the replacement column as needed to disengage the classifying wheel from the drive motor, and rotate the replacement column as needed to align the appropriate classifying wheel with the discharge conduit;

[0020] S3: Adjust the position of the sliding seal block to align each through-tube with a fine screen with a suitable mesh diameter;

[0021] S4: The mixed crude product output from the discharge conduit enters the cyclone separator after being screened by the primary grading component and the secondary grading component, and finally separated into gas and solid.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Multiple grading wheels with different grading diameters can be pre-set in the exchange column. If the product diameter needs to be changed greatly, the grading wheel can be quickly switched by twisting the exchange column. The air flow crushing system does not need to stop working during the whole process, ensuring the continuity and efficiency of the system production.

[0024] 2. The secondary grading component can screen out products with too small diameters, so that the final product diameter is within the required stable range, meeting actual production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of an airflow pulverizing system for processing crystalline silicon dioxide according to the present invention;

[0027] Figure 2 This is a schematic diagram of the split structure of the primary grading component of the present invention;

[0028] Figure 3 It is a cross-sectional view of the fixed bin of the present invention;

[0029] Figure 4 A cross-sectional view of a replacement column according to the present invention;

[0030] Figure 5 A schematic diagram of the split structure of the secondary grading component of the present invention at one angle;

[0031] Figure 6 This is a schematic diagram of the split structure of the secondary grading component described in the present invention from another angle.

[0032] In the figure: 1. air flow mill; 11. crushing chamber; 12. venturi tube; 13. air inlet pipe; 14. discharge pipe; 2. primary classification assembly; 21. fixed chamber; 2101. installation chamber; 2102. discharge channel; 22. exchange column; 2201. placement chamber; 2202. rotating groove; 2203. communication channel; 2204. side discharge port; 221. cylindrical main part; 222. adjustment rod; 223. lining 1. Thrust ring; 224. Connecting rod; 225. Lifting spring; 23. Classifying wheel; 24. Cover plate; 2401. Array opening; 25. Driving motor; 3. Secondary grading assembly; 301. Classifying chamber; 302. Adjusting guide rail; 31. Clamp; 32. Rotating screen plate; 33. Blowback motor; 34. Isolation ring; 35. Fine screen; 36. Sliding sealing block; 37. Through pipe; 38. Sealing baffle; 4. Cyclone separator. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Reference Figure 1-6 A gas flow pulverizing system for processing crystalline silicon dioxide comprises a gas flow pulverizer 1, a primary grading component 2, a secondary grading component 3 and two cyclone separators 4. The primary grading component 2 is connected to the gas flow pulverizer 1. After being pulverized by the gas flow pulverizer 1, the raw material can enter the primary grading component 2 for coarse screening. The directly suitable product will enter the secondary grading component 3 through the primary grading component 2. The secondary grading component 3 will screen the product into two parts with different diameters. The two products with different diameters will enter the two cyclone separators 4 respectively for gas-solid separation.

[0035] The air flow mill 1 includes a crushing bin 11, a venturi tube 12, an air inlet pipe 13 and a discharge conduit 14. High-speed gas is filled into the crushing bin 11 from the air inlet pipe 13 to form a vortex airflow. The material to be processed enters the crushing bin 11 with the help of the venturi tube 12, and collides with each other and is crushed into particles with smaller diameters under the push of the high-speed vortex airflow. The crushed particles enter the discharge conduit 14 with the airflow and are pushed to the primary classification component 2.

[0036] The primary grading assembly 2 includes a fixed bin 21, a replacement column 22, a plurality of grading wheels 23 and a cover plate 24. The fixed bin 21 has an installation cavity 2101 and a discharge channel 2102. The discharge conduit 14 is connected to the installation cavity 2101, and the discharge channel 2102 is connected to the installation cavity 2101.

[0037] The exchange column 22 is installed in the installation cavity 2101. The exchange column 22 includes a cylindrical main part 221 and an adjusting rod 222. The adjusting rod 222 is vertically inserted and arranged at the axial center position of the cylindrical main part 221. The cylindrical main part 221 has a plurality of placement cavities 2201 arranged symmetrically around the circumference. A grading wheel 23 can be vertically placed in each placement cavity 2201. The grading wheel 23 can be axially rotated in the placement cavity 2201.

[0038] The placement cavity 2201 passes through the exchange column 22 from top to bottom, and a lining ring 223 is provided at one end of the placement cavity 2201 close to the discharge pipe 14, and the lining ring 223 can move up and down in the placement cavity 2201. The grading wheel 23 can be placed on the lining ring 223, so as to move up and down together with the lining ring 223.

[0039] The cylindrical main component 221 has a channel at the center of its axis for allowing the adjusting rod 222 to be inserted, and a rotating groove 2202 is vertically provided on the side wall of the channel. A rotating driving piece that can move up and down in the rotating groove 2202 is fixedly provided on the side wall of the adjusting rod 222, so that the adjusting rod 222 can drive the cylindrical main component 221 to rotate axially.

[0040] The adjusting rod 222 extends to the position where the lining ring 223 is set. Each placement cavity 2201 and the channel where the adjusting rod 222 is inserted are connected by a connecting channel 2203, and the connecting channel 2203 is set at a position close to the bottom end of the placement cavity 2201. A connecting rod 224 is set in the connecting channel 2203. The adjusting rod 222 and the lining ring 223 are connected by the connecting rod 224. The connecting channel 2203 has a certain height so that the adjusting rod 222 can drive the lining ring 223 to move up and down through the connecting rod 224. The adjusting rod 222 extends upward to the outside of the cylindrical main part 221. The technician can lift or press the adjusting rod 222 to make the grading wheel 23 placed on the lining ring 223 move vertically up and down, and can also twist the adjusting rod 222 to make the entire exchange column 22 rotate axially.

[0041] The cover plate 24 is removably mounted on the upper end of the fixed bin 21 and covers the exchange column 22. A drive motor 25 is mounted on the upper surface of the cover plate 24 near the discharge channel 2102. The drive motor 25 is arranged above the discharge conduit 14. The transmission shaft of the drive motor 25 passes through the cover plate 24 and penetrates into the installation cavity 2101. The transmission shaft inserted into the installation cavity 2101 does not affect the axial rotation of the exchange column 22 in the installation cavity 2101.

[0042] The bottom end of the adjusting rod 222 is connected to the bottom plate of the cylindrical main part 221 through a lifting spring 225. When the grading wheels 23 with different grading diameters are placed on the lining rings 223 in each placement cavity 2201, the lifting spring 225 can provide sufficient support force to keep the adjusting rod 222 in the highest position that can be reached. The upper end of the grading wheel 23 is equipped with a docking sleeve that can correspond to the transmission shaft of the driving motor 25. When the lifting spring 225 lifts the adjusting rod 222, the upper end of the grading wheel 23 protrudes upward from the placement cavity 2201 and can dock with the driving motor 25, so that the driving motor 25 drives the grading wheel 23 to rotate axially at high speed.

[0043] The outer peripheral wall of the cylindrical main part 221 also has a side discharge port 2204 that connects each placement cavity 2201 with the outside. The exchange column 22 can be rotatably adjusted so that a grading wheel 23 is located above the discharge conduit 14. The grading wheel 23 can be driven by the driving motor 25 to rotate axially at high speed, thereby performing preliminary screening on the crushed products input by the discharge conduit 14. Products with too large diameters will flow back to the crushing bin 11 through the discharge conduit 14 for technical crushing. Products that meet the diameter requirements will pass through the grading plate of the grading wheel 23 together with the airflow, and pass through the side discharge port 2204 and the discharge channel 2102 in turn to enter the secondary grading component 3.

[0044] A plurality of grading wheels 23 with different grading diameters can be installed in one of the exchange columns 22. If the required change in the product diameter is large, the technician only needs to press down the adjustment rod 222 to disengage the grading wheel 23 from the drive motor 25, and twist the exchange column 22 to quickly switch the grading wheel 23. The airflow crushing system does not need to stop working during the whole process, thereby ensuring the continuity and efficiency of the system production.

[0045] Preferably, the cover plate 24 is further provided with a plurality of array openings 2401, and the arrangement positions of the array openings 2401 correspond to the arrangement positions of the respective grading wheels 23 in the exchange column 22. The technician can directly pull the grading wheel 23 out of the placement cavity 2201 through the array openings 2401 to replace and maintain the grading wheel 23.

[0046] The secondary classification assembly 3 includes two clamping plates 31, a rotating screen plate 32 and a blow-back motor 33. The clamping plates 31 are butt-jointed to form a classification chamber 301. The rotating screen plate 32 is installed in the classification chamber 301 and is driven by the motor to perform axial rotation.

[0047] The inner space of the rotating screen plate 32 is divided into a plurality of screening areas by a plurality of concentrically arranged isolation rings 34. Each screening area is covered with a fine screen 35. The screen mesh 35 in each screening area has a different mesh size.

[0048] The two clamping plates 31 are symmetrically provided with a pair of vertically extending adjustment rails 302, and the adjustment rails 302 radially extend to cover each screening area of ​​the rotating screen plate 32. A sliding sealing block 36 is movably installed in the adjustment rails 302, and the length of the sliding sealing block 36 is not greater than the width of one screening area of ​​the rotating screen plate 32. The sliding sealing block 36 can move along the adjustment rails 302 to correspond to the fine screens 35 of different screening areas of the rotating screen plate 32.

[0049] A through pipe 37 is arranged in the sliding sealing block 36. The through pipes 37 arranged at different positions are respectively connected with the primary grading component 2, the blowback motor 33 and the cyclone separator 4. The through pipe 37 extends into the grading chamber 301 and is close to the fine screen 35, while the isolation ring 34 is close to the inner wall of the clamping plate 31. Move each sliding seal 36 to a position corresponding to the same fine screen 35, and the products screened by the primary grading assembly 2 will flow to the fine screen 35 through the through pipe 37 with the air flow, wherein the products with smaller diameters will directly pass through the mesh of the fine screen 35 and be received by the through pipe 37 on the opposite side, and this through pipe 37 is connected to a cyclone separator 4 to separate the products that are too small from the fine screen 35 by gas and solid; the product particles with larger diameters will be blocked by the fine screen 35, and then move to the through pipe 37 symmetrical with the product flowing into the through pipe 37 with the rotating fine screen 35, and the symmetrical through pipe 37 is connected to another cyclone separator 4, and the back-blowing motor 33 will blow air in the opposite side of the symmetrical through pipe 37, so as to blow the products of the required diameter intercepted by the fine screen 35 into the cyclone separator 4 for gas-solid separation, so as to obtain the products of the required diameter. The user can adjust and move the sliding seal 36 to different positions, so that the through pipe 37 can dock with the fine screen 35 with different mesh diameters, so as to obtain the required products of different diameter ranges.

[0050] A plurality of sealing baffles 38 are also inserted transversely into the adjusting guide rail 302, and one end of the sealing baffle 38 can be inserted into the adjusting guide rail 302 to fill the portion of the adjusting guide rail 302 that is not sealed by the sliding seal block 36, thereby ensuring the sealing of the grading chamber 301. The sealing baffle 38 can be moved horizontally, and when the sliding seal block 36 is adjusted, the sealing baffle 38 can be moved out of the adjusting guide rail 302 to make way for the movement of the sliding seal block 36. After the adjustment of the sliding seal block 36 is completed, the sealing baffle 38 can be moved back to keep the sliding seal block 36 at the end position.

[0051] A method for using a gas flow pulverizing system for processing crystalline silicon dioxide comprises the following steps:

[0052] S1: injecting materials into the air flow mill 1 for preliminary crushing, and the mixed coarse products after crushing are transported to the primary classification component 2 through the discharge conduit 14;

[0053] S2: Press the replacement column 22 as needed to disengage the classifying wheel 23 from the drive motor 25, and rotate the replacement column 22 as needed to align the appropriate classifying wheel 23 with the discharge conduit 14;

[0054] S3: Adjust the position of the sliding seal 36 to align each through-tube 37 with the fine screen 35 with a suitable mesh diameter;

[0055] S4: The mixed crude product outputted from the discharge conduit 14 enters the cyclone separator 4 after being screened by the primary classification component 2 and the secondary classification component 3, and finally undergoes gas-solid separation.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas flow pulverizing system for processing crystalline silicon dioxide, comprising a gas flow pulverizer (1), a primary classification component (2), a secondary classification component (3) and two cyclone separators (4), characterized in that: The air flow pulverizer (1) is connected to a primary classification component (2), and the primary classification component (2) comprises a fixed bin (21), a switching column (22), and a plurality of classification wheels (23). The air flow pulverizer (1) is connected to the fixed bin (21), and the switching column (22) is axially rotatably mounted in the fixed bin (21). The switching column (22) has a plurality of circumferentially symmetrical placement cavities (2201), and a classification wheel (23) is vertically placed in each placement cavity (2201), and the classification wheel (23) can be axially rotated; The secondary classification component (3) comprises two clamping plates (31), a rotating screen plate (32) and a blow-back motor (33); the clamping plates (31) are butt-jointed to form a classification chamber (301); the rotating screen plate (32) is installed in the classification chamber (301); two through pipes (37) are symmetrically installed on each clamping plate (31); the through pipes (37) are respectively connected to the primary classification component (2), the blow-back motor (33) and the cyclone separator (4); The placement cavity (2201) passes through the exchange column (22) from top to bottom, a lining ring (223) is provided at the lower part of the placement cavity (2201), and the grading wheel (23) is placed on the lining ring (223); An adjusting rod (222) is vertically inserted into the center of the axis of the exchange column (22); each of the placement cavities (2201) and the channel into which the adjusting rod (222) is inserted are connected via a connecting channel (2203); a connecting rod (224) is provided in the connecting channel (2203); and the adjusting rod (222) is connected to the lining ring (223) via the connecting rod (224); The upper end of the fixed bin (21) is covered with a cover plate (24), a driving motor (25) is installed on the upper surface of the cover plate (24), and a docking sleeve corresponding to the transmission shaft of the driving motor (25) is installed on the upper end of the grading wheel (23); The internal space of the rotating screen plate (32) is divided into a plurality of screening areas by a plurality of concentrically arranged isolation rings (34), each screening area is covered with a fine screen (35), and the mesh diameter of the fine screen (35) in each screening area is different; The two clamping plates (31) are symmetrically provided with a pair of vertically extending adjustment rails (302), and the adjustment rails (302) extend radially to cover various screening areas of the rotating screen plate (32); A sliding sealing block (36) is movably installed in the adjusting guide rail (302), and the through pipe (37) passes through the sliding sealing block (36). A plurality of sealing baffles (38) are transversely inserted into the adjusting guide rail (302). The sealing baffles (38) can move horizontally, and one end of the sealing baffles (38) can be inserted into the adjusting guide rail (302).

2. The air flow pulverizing system for processing crystalline silicon dioxide according to claim 1, characterized in that: The bottom end of the adjusting rod (222) is connected to the bottom plate of the exchange column (22) via a lifting spring (225).

3. The method for using a jet milling system for processing crystalline silicon dioxide according to claim 1 or 2, characterized in that: The following steps are involved: S1: injecting materials into the air flow mill (1) for preliminary crushing, and the mixed coarse products after crushing are conveyed to the primary classification component (2); S2: Pressing the exchange column (22) to disengage the classifying wheel (23) from the driving motor (25), and rotating the exchange column (22) as needed to allow the material conveyed by the air flow mill (1) to enter a suitable classifying wheel (23); S3: adjusting the position of the sliding sealing block (36) so as to align each of the through-tubes (37) with the fine screen (35) having a suitable mesh diameter; S4: The mixed coarse product outputted from the air flow pulverizer (1) is screened by the primary classification component (2) and the secondary classification component (3) and then enters the cyclone separator (4), where it is finally separated into gas and solid.

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