CN219725823U - Device for recycling boron carbide - Google Patents

Abstract

The utility model relates to the technical field of boron carbide recovery, and discloses a device for recovering boron carbide. The device comprises: the grinding mechanism is provided with a slurry outlet; the feeding hopper is communicated with the slurry outlet through a pipeline, a first filter screen and a second filter screen are arranged in the pipeline, the mesh number of the first filter screen is smaller than that of the second filter screen, and the bottom of the feeding hopper is also connected with a diversion trench; the water washing mechanism comprises an inner box body and an outer box body, wherein the inner box body is arranged in the outer box body, a spraying port and a stirring assembly are arranged in the inner box body, a heater assembly is arranged on the outer wall of the inner box body, a water outlet is further formed in the bottom of the inner box body, and a material taking port is formed in the side face of the inner box body. The device provided by the utility model can effectively recycle the boron carbide with the particle size meeting the requirement, so that the boron carbide can be reused, and the cost is effectively reduced.

Description

Device for recycling boron carbide

Technical Field

The utility model relates to the technical field of boron carbide recovery, in particular to a device for recovering boron carbide.

Background

With popularization of LEDs, intelligent terminal devices, and the like, sapphire substrate wafers are becoming more and more widely used. Before forming the sapphire substrate wafer, the sapphire is sliced and then thinned and coarsened by boron carbide.

Wherein, the thinning is to remove the thickness of the cutting sheet, and the thickness of the cutting sheet is generally 55-60 um before the cutting sheet is processed to the thickness of a finished product. The slurry prepared in the thinning step is generally prepared by mixing a certain amount of purified water with boron carbide with a D50 particle size of 60-70 um and a chemical auxiliary agent, and a part of slurry is prepared, so that 300-350 um of slurry can be removed. And the coarsening is to precisely process the roughness of the substrate slice after the thickness is reduced to the thickness requirement.

The slurry prepared in the roughening step needs to be added with a certain amount of polymer chain suspending agent, so that the boron carbide can be uniformly and fully suspended in the prepared slurry, and the best roughness processing effect is achieved. After stirring before processing and pressurizing during processing, the slurry can destroy polymer chains in the suspending agent after one-time use, so that the slurry is agglomerated and precipitated and cannot be reused.

Therefore, it is important to develop a device that can recover the boron carbide used in the roughening process so that the recovered boron carbide can be reused in the thinning process.

Disclosure of Invention

The utility model aims to solve the problem that boron carbide in grinding waste liquid cannot be reused in the prior art.

In order to achieve the above object, the present utility model provides an apparatus for recovering boron carbide, comprising:

the grinding mechanism is used for grinding the sapphire wafers, and a slurry outlet for leading out grinding waste liquid is arranged on the grinding mechanism;

the feeding hopper is communicated with the slurry outlet through a pipeline, a first filter screen and a second filter screen for filtering the grinding waste liquid are arranged in the pipeline, the mesh number of the first filter screen is smaller than that of the second filter screen, and the bottom of the feeding hopper is also connected with a diversion trench;

the washing mechanism comprises an inner box body and an outer box body, wherein the inner box body is arranged in the outer box body, a spraying opening and a stirring assembly are arranged in the inner box body, the spraying opening is used for flushing boron carbide, a heater assembly used for drying and flushing the boron carbide is arranged on the outer wall of the inner box body, a water outlet used for discharging sewage after flushing is further formed in the bottom of the inner box body, and a material taking opening used for taking out the dried boron carbide is formed in the side face of the inner box body.

Preferably, the pipeline comprises a liquid flowing pipe I and a liquid flowing pipe II which are sequentially connected with the slurry outlet, the first filter screen is arranged at the tail end of the liquid flowing pipe I, and the second filter screen is arranged at the tail end of the liquid flowing pipe II.

Preferably, the mesh size of the first filter screen is at least 30 mesh smaller than the mesh size of the second filter screen.

Preferably, the mesh number of the first filter screen is 10-20 meshes, and the mesh number of the second filter screen is 40-60 meshes.

Preferably, at least 3 diversion blocks are uniformly distributed in the diversion trench.

Preferably, the stirring assembly comprises a motor, a mounting frame, a supporting seat, a transmission shaft, a coupler and a stirring shaft, wherein the mounting frame is connected with the inner wall of the inner box body, the supporting seat is arranged on the mounting frame, the transmission shaft is inserted into the inner box body from the top end of the inner box body and penetrates through a bearing hole of the supporting seat, the motor is arranged on the outer side of the outer box body and is connected with the transmission shaft, the stirring shaft penetrates through the bearing hole of the supporting seat, and the coupler is connected with the lower end of the transmission shaft and the upper end of the stirring shaft.

Preferably, the mounting frame comprises two connecting rods, two ends of each connecting rod are respectively connected with the inner wall of the inner box body, the two connecting rods are arranged at opposite intervals along the radial direction parallel to the inner box body, and two opposite sides of the supporting seat are respectively connected with the two connecting rods in a one-to-one correspondence manner.

Preferably, the stirring shaft comprises a shaft body connected with the transmission shaft through the coupling and a first blade support arranged on the shaft body, wherein the first blade support comprises a mounting ring sleeved on the shaft body and at least two stirring blades uniformly arranged on the mounting ring at intervals along the circumferential direction of the mounting ring.

More preferably, the stirring shaft further comprises a second blade support provided on the free end of the shaft body.

Preferably, the heater assembly comprises at least two annular heating rods evenly distributed around the outer wall of the inner housing.

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the two-stage filter screens are arranged, the mesh number of the first filter screen is smaller than that of the second filter screen, so that impurities in the grinding waste liquid can be effectively filtered, and boron carbide meeting the particle size requirement is obtained.

(2) According to the utility model, the grinding waste liquid subjected to two-stage filtration is introduced into the water washing mechanism, the residual suspending agent in the grinding waste liquid is washed through the spraying port and the stirring assembly in the water washing mechanism, and then the grinding waste liquid is dried through the heater assembly, so that the boron carbide with the particle size meeting the requirement can be effectively recovered, and the boron carbide can be reused, thereby effectively reducing the cost.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic view of an apparatus for recovering boron carbide provided by the present utility model;

FIG. 2 is a schematic view of the structure of a water washing mechanism in the apparatus for recovering boron carbide provided by the utility model;

fig. 3 is a schematic structural view of a stirring assembly in the apparatus for recovering boron carbide provided by the present utility model.

Description of the reference numerals

100. Grinding mechanism 200 and feed hopper

300. Water washing mechanism 301 and inner box

302. Outer box 303, spray opening

304. Stirring assembly 3041 and motor

3042. Mounting frame 3042-1, connecting rod

3043. Support seat 3044 and transmission shaft

3045. Shaft coupling 3046 and stirring shaft

3046-1, first blade support 3046-2, mounting ring

3046-3, stirring blade 3046-4, second blade support

305. Heater assembly 306, drain outlet

307. Material taking port 400 and liquid flowing pipe I

500. First filter screen 600, liquid flow pipe II

700. Second filter screen 800, guiding gutter

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.

As shown in fig. 1 to 3, the present utility model provides a device for recovering boron carbide, which is mainly used for recovering boron carbide in a grinding waste liquid obtained after a sapphire sheet is coarsened, and comprises:

the polishing device comprises a polishing mechanism 100, wherein the polishing mechanism 100 is used for polishing a sapphire wafer, and a slurry outlet used for leading out polishing waste liquid is arranged on the polishing mechanism 100;

the feeding hopper 200 is communicated with the slurry outlet through a pipeline, a first filter screen 500 and a second filter screen 700 for filtering the grinding waste liquid are arranged in the pipeline, the mesh number of the first filter screen 500 is smaller than that of the second filter screen 700, and the bottom of the feeding hopper 200 is also connected with a diversion trench 800;

the washing mechanism 300, washing mechanism 300 includes interior box 301 and outer box 302, interior box 301 set up in the inside of outer box 302, the inside of interior box 301 is provided with spray port 303 and stirring subassembly 304, spray port 303 is used for washing boron carbide, the outer wall of interior box 301 is provided with the heater subassembly 305 that is used for drying to wash back boron carbide, the bottom of interior box 301 has still been seted up and has been used for the sewage exhaust outlet 306 after washing, the side of interior box 301 is provided with the extracting hole 307 that takes out the boron carbide after drying.

The shower port 303 is connected to a water source through a pipe, and the water source may be disposed inside the inner case 301, inside the outer case 302, or outside the washing mechanism 300, and the water source is disposed outside the washing mechanism 300 for more sufficient washing; the utility model has no special requirements on the structure of the water source, and only needs to be capable of providing sufficient water for flushing.

According to the utility model, the grinding waste liquid obtained after the coarse treatment sequentially passes through two stages of filter screens, impurities in the grinding waste liquid are effectively filtered, the filtered material is placed in a water washing mechanism 300, the residual suspending agent in the material is washed under the combined action of a spray port 303 and a stirring assembly 304, and then the material is dried under the action of a heater assembly 305, so that boron carbide with the particle size meeting the requirement is recovered.

The structure of the polishing mechanism 100 is not particularly required, and any polishing mechanism with any structure known in the art can be adopted, and only polishing and thickening of the sapphire wafer can be realized, and the polishing mechanism 100 can be a double-sided fixed abrasive polishing mechanism for sapphire thinning processing of CN205674012U, a double-sided sapphire polishing device of CN204843822U, or a double-sided gantry type sapphire wafer polishing/polishing machine of CN 205033069U.

As shown in fig. 1, the pipeline preferably includes a flow pipe I400 and a flow pipe II 600 sequentially connected to the slurry outlet 101, the first filter screen 500 is disposed at the end of the flow pipe I400, and the second filter screen 700 is disposed at the end of the flow pipe II 600.

Preferably, the mesh size of the first filter screen 500 is at least 30 mesh smaller than the mesh size of the second filter screen 700.

The inventors found that providing two stages of filter screens downstream of the grinding mechanism 100 and making the mesh number of the first filter screen 500 smaller than that of the second filter screen 700 can more effectively filter impurities in the grinding waste liquid to obtain boron carbide meeting the particle size requirement.

In order to more effectively filter out impurities in the grinding waste liquid, it is preferable that the mesh number of the first filter screen 500 is 10-20 mesh and the mesh number of the second filter screen 700 is 40-60 mesh.

Preferably, at least 3 diversion blocks (not shown in the drawing) are uniformly distributed in the diversion trench 800. The shape of the guide block is not particularly limited, and the guide block is in a cone structure in an exemplary manner. The grinding waste liquid flows into the washing mechanism 300 evenly and dispersedly under the flow guiding action of the conical flow guiding block.

As shown in fig. 3, the stirring assembly 304 preferably includes a motor 3041, a mounting frame 3042, a supporting seat 3043, a transmission shaft 3044, a coupling 3045, and a stirring shaft 3046, wherein the mounting frame 3042 is connected to an inner wall of the inner housing 301, the supporting seat 3043 is disposed on the mounting frame 3042, the transmission shaft 3044 is inserted into the inner housing 301 from a top end of the inner housing 301 and penetrates through a bearing hole of the supporting seat 3043, the motor 3041 is mounted on an outer side of the outer housing 302 and is connected to the transmission shaft 3044, the stirring shaft 3046 penetrates through the bearing hole of the supporting seat 3043, and the coupling 3045 is connected to a lower end of the transmission shaft 3044 and an upper end of the stirring shaft 3046.

According to the stirring assembly 304 provided by the utility model, the motor 3041 is adopted to drive the stirring shaft 3046 to perform forced circulation stirring on the feed liquid in the inner box 301, so that the aim of improving the flushing efficiency is fulfilled, and when the stirring shaft 3046 acts, the supporting seat 3043 not only can play a supporting role on the stirring shaft 3046, but also can avoid radial movement, and the stability of stirring movement is ensured.

In one embodiment of the present utility model, the mounting frame 3042 includes two connecting rods 3042-1, two ends of each connecting rod 3042-1 are respectively connected to the inner wall of the inner case 301, the two connecting rods 3042-1 are disposed at opposite intervals along a radial direction parallel to the inner case 301, and two opposite sides of the supporting seat 3043 are respectively connected to the two connecting rods 3042-1 in a one-to-one correspondence. The mounting frame 3042 is arranged to be two connecting rods 3042-1 which are arranged at opposite intervals, so that the mounting stability of the supporting seat 3043 can be ensured, the occupied space can be reduced, and the influence on forced circulation stirring is reduced. Specifically, in an embodiment, the supporting seat 3043 may include a bearing seat connected to the two connecting rods 3042-1, and a bearing body disposed on the bearing seat, and the stirring assembly 304 is disposed through a bearing hole of the bearing body.

Preferably, the stirring shaft 3046 comprises a shaft body connected with the transmission shaft 3044 through the coupling 3045 and a first blade support 3046-1 arranged on the shaft body, wherein the first blade support 3046-1 comprises a mounting ring 3046-2 sleeved on the shaft body and at least two stirring blades 3046-3 uniformly arranged on the mounting ring 3046-2 at intervals along the circumferential direction of the mounting ring 3046-2. The feed liquid in the inner tank 301 may be circularly stirred by the first blade support. The stirring vane 3046-3 may be detachably disposed on the mounting ring 3046-2 to facilitate replacement and repair of the stirring vane 3046-3, and at the same time, a first external thread section is formed on the shaft body 3046-1, and an internal thread screw-coupled with the first external thread section on the shaft body 3046-1 is formed on the inner side of the mounting ring 3046-2 to facilitate disassembly and adjustment of the position of the mounting ring 3046-2.

More preferably, the stirring shaft 3046 further includes a second blade support 3046-4, the second blade support 3046-4 being disposed on a free end of the shaft body 3046-1. That is, the second blade support 3046-4 may further stir the feed liquid in the inner tank 301 in a circulating manner. Specifically, a second external thread section is formed on the free end of the shaft body 3046-1, and an internal thread is formed on the inner side of the mounting ring 3046-2 of the second vane support 3046-4 to be screw-coupled with the second external thread section, thereby facilitating the disassembly and adjustment of the position of the second vane support 3046-4.

As shown in fig. 2, the heater assembly 305 preferably includes at least two annular heating rods uniformly distributed around the outer wall of the inner housing 301.

The annular heating rod has no special requirements on the type of the annular heating rod, and only needs to be satisfied.

The application flow of the device for recycling boron carbide is preferably as follows:

placing the cut sapphire sheet in a grinding mechanism 100, adding grinding fluid containing boron carbide, thinning and rough machining the sapphire sheet in the grinding mechanism 100, enabling the machined grinding waste liquid to flow into a feed hopper 200 through a slurry outlet (not shown in the drawing), sequentially passing through a liquid flowing pipe I400, a first filter screen (with 20 meshes) 500, a liquid flowing pipe II 600 and a second filter screen (with 50 meshes) 700, filtering out impurities, and uniformly and dispersedly flowing into a water washing mechanism 300 through a conical guide block (not shown in the drawing) in a guide groove 800;

and opening a spraying port 303 and a stirring assembly 304, flushing the material with water under the action of a stirring shaft 3046 to completely clean the residual suspending agent in the material, then opening an annular heating rod in a heater assembly 305 to dry the boron carbide, recovering the boron carbide with the particle size meeting the requirement, and finally taking out the dried boron carbide from a material taking port 307 to be put into a subsequent thinning and thickening process.

According to the utility model, the grinding waste liquid obtained after the thinning and coarse-drawing treatment sequentially passes through the two-stage filter screen, impurities in the grinding waste liquid are effectively filtered, the filtered material is placed in the water washing mechanism, the suspending agent remained in the material is washed under the combined action of the spray opening and the stirring assembly, and then the grinding waste liquid is dried under the action of the heater assembly, so that the boron carbide with the particle size meeting the requirement is recovered.

The preferred embodiments of the present utility model have been described in detail above, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a number of simple variants of the technical solution of the utility model are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the utility model, all falling within the scope of protection of the utility model.

Claims (10)

1. An apparatus for recovering boron carbide, the apparatus comprising:

the polishing device comprises a polishing mechanism (100), wherein the polishing mechanism (100) is used for polishing a sapphire wafer, and a slurry outlet used for leading out polishing waste liquid is arranged on the polishing mechanism (100);

the feeding hopper (200) is communicated with the slurry outlet through a pipeline, a first filter screen (500) and a second filter screen (700) for filtering the grinding waste liquid are arranged in the pipeline, the mesh number of the first filter screen (500) is smaller than that of the second filter screen (700), and the bottom of the feeding hopper (200) is also connected with a diversion trench (800);

washing mechanism (300), washing mechanism (300) include interior box (301) and outer box (302), interior box (301) set up in the inside of outer box (302), the inside of interior box (301) is provided with spray opening (303) and stirring subassembly (304), spray opening (303) are used for washing boron carbide, the outer wall of interior box (301) is provided with heater subassembly (305) that are used for stoving to wash back boron carbide, drain outlet (306) that are used for with the sewage exhaust after washing are still seted up to the bottom of interior box (301), the side of interior box (301) is provided with and takes out material mouth (307) with the boron carbide after the stoving.

2. The device according to claim 1, wherein the pipeline comprises a flow tube I (400) and a flow tube II (600) connected in sequence with the slurry outlet (101), the first filter screen (500) is arranged at the end of the flow tube I (400), and the second filter screen (700) is arranged at the end of the flow tube II (600).

3. The apparatus of claim 2, wherein the mesh size of the first filter (500) is at least 30 mesh smaller than the mesh size of the second filter (700).

4. A device according to claim 3, characterized in that the first filter screen (500) has a mesh size of 10-20 mesh and the second filter screen (700) has a mesh size of 40-60 mesh.

5. The device according to claim 1, wherein at least 3 guide blocks are uniformly distributed in the guide groove (800).

6. The device according to claim 1, wherein the stirring assembly (304) comprises a motor (3041), a mounting frame (3042), a supporting seat (3043), a transmission shaft (3044), a coupler (3045) and a stirring shaft (3046), the mounting frame (3042) is connected with the inner wall of the inner box (301), the supporting seat (3043) is arranged on the mounting frame (3042), the transmission shaft (3044) is inserted into the inner box (301) from the top end of the inner box (301) and penetrates through a bearing hole of the supporting seat (3043), the motor (3041) is mounted on the outer side of the outer box (302) and connected with the transmission shaft (3044), the stirring shaft (3046) penetrates through a bearing hole of the supporting seat (3043), and the coupler (3045) is connected with the lower end of the transmission shaft (3044) and the upper end of the stirring shaft (3046).

7. The device according to claim 6, wherein the mounting frame (3042) comprises two connecting rods (3042-1), two ends of each connecting rod (3042-1) are respectively connected with the inner wall of the inner box body (301), the two connecting rods (3042-1) are arranged at opposite intervals along the radial direction parallel to the inner box body (301), and two opposite sides of the supporting seat (3043) are respectively connected with the two connecting rods (3042-1) in a one-to-one correspondence manner.

8. The apparatus according to claim 6, wherein the stirring shaft (3046) includes a shaft body connected to the transmission shaft (3044) through the coupling (3045) and a first blade support (3046-1) provided on the shaft body, the first blade support (3046-1) including a mounting ring (3046-2) fitted over the shaft body and at least two stirring blades (3046-3) provided on the mounting ring (3046-2) at uniform intervals in a circumferential direction of the mounting ring (3046-2).

9. The apparatus of claim 8, wherein the stirring shaft (3046) further comprises a second blade support (3046-4), the second blade support (3046-4) being disposed on a free end of the shaft body.

10. The apparatus of any of claims 1-9, wherein the heater assembly (305) comprises at least two annular heating rods evenly distributed around the outer wall of the inner housing (301).