CN221018533U - Online grinding and grading device for sheet metal powder and continuous production device thereof - Google Patents
Online grinding and grading device for sheet metal powder and continuous production device thereof Download PDFInfo
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- CN221018533U CN221018533U CN202322283240.4U CN202322283240U CN221018533U CN 221018533 U CN221018533 U CN 221018533U CN 202322283240 U CN202322283240 U CN 202322283240U CN 221018533 U CN221018533 U CN 221018533U
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- 238000000227 grinding Methods 0.000 title claims abstract description 84
- 239000000843 powder Substances 0.000 title claims abstract description 84
- 239000002184 metal Substances 0.000 title claims abstract description 69
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 69
- 238000010924 continuous production Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 239000004576 sand Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 23
- 238000012216 screening Methods 0.000 claims description 23
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 27
- 239000002923 metal particle Substances 0.000 description 17
- 230000006872 improvement Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Crushing And Grinding (AREA)
Abstract
The utility model provides an online grinding grading device for sheet metal powder and a continuous production device thereof, wherein the online grinding grading device for the sheet metal powder comprises a grinding container, wherein grinding equipment is arranged in the grinding container, a screen is arranged in the grinding container, the screen is positioned below the grinding equipment, and the grinding container is divided into an upper part and a lower part; the upper portion of grinding container is equipped with the feed inlet, the bottom of grinding container is equipped with the discharge gate, the discharge gate is connected to the feed inlet through first conveying mechanism, the aperture of screen cloth is not greater than the external diameter of the slice metal powder of settlement. By adopting the technical scheme of the utility model, the phenomena of excessive processing of crushing, cold welding and ball milling of the flaky metal powder are avoided, the performance of the flaky metal powder is improved, the production efficiency is improved, and the energy consumption is reduced.
Description
Technical Field
The utility model belongs to the technical field of metal powder processing and manufacturing, and particularly relates to an online grinding grading device for sheet metal powder and a continuous production device thereof.
Background
The metal nickel powder has conductivity and ferromagnetism, and has wide application in the field of electromagnetic shielding. In particular, the flake nickel powder has more excellent electromagnetic shielding effect due to the unique two-dimensional morphology structure, and is widely applied in the fields of conductive paint, electromagnetic shielding films, conductive adhesive, conductive cloth, conductive foam, conductive paint and the like.
In industry, a ball milling method is generally adopted to produce flaky nickel powder, as disclosed in patent CN105834436A, spherical nickel powder produced by a PVD method is emulsified and dispersed to prepare slurry, and then the slurry is milled in a sand mill to prepare flaky nickel powder. Patent CN114012099a discloses that fine flake nickel powder is obtained by ball milling for more than 8 hours by using zirconia grinding balls in a ball mill by adopting a mode of primary milling and secondary ball milling. Patent CN114888294B discloses that sheet-shaped nano nickel powder is prepared by grinding nano nickel powder in a sand mill. The flake nickel powder prepared by the ball milling method disclosed above is in a closed container, and nickel metal particles are deformed into flakes under the continuous striking of the grinding balls. In order to achieve as uniform a deformation as possible of all the metal particles, a longer ball milling time is generally required. After the ball milling is finished, the ball mill is opened, taken out together with the metal powder and the grinding balls, and separated to obtain the flaky metal powder.
In the intermittent and long-time continuous ball milling process, the metal powder is knocked by the grinding balls to generate plastic deformation, crushing, cold welding, re-deformation, re-crushing, re-cold welding and other processes. Meanwhile, because of the different sizes and shapes of the metal particles, the stress and deformation states of each particle are different at the same time, and various states of the metal particles which are just deformed, the broken and cold-welded metal particles which are still broken, the flaky requirement of the metal particles which are still not deformed and the like coexist. At this ball milling time, the metal particles which have not been deformed or have just begun to be deformed are processed, the metal particles which just meet the flaking requirement are processed, and the metal particles which have been crushed and cold welded are over-processed. Due to the coexistence of multiple state of the metal powder in the ball milling process, the difference of multiple states has to be reduced as much as possible by prolonging the ball milling time, so that approximately the same flaky particles are obtained, and on one hand, the processed flaky metal powder has more processing defects and deteriorated performance; on the other hand, long-time over-processing wastes energy and reduces processing efficiency.
Therefore, development of a production device capable of timely separating and taking out metal powder deformed to meet the flaking requirement from the ball milling process is urgently needed, and excessive processing is avoided.
Disclosure of utility model
Aiming at the technical problems, the utility model discloses an online grinding grading device for sheet metal powder and a continuous production device thereof, which can avoid over-processing.
In this regard, the utility model adopts the following technical scheme:
An online grinding grading device for sheet metal powder comprises a grinding container, wherein grinding equipment is arranged in the grinding container, a screen is arranged in the grinding container, and the screen is positioned below the grinding equipment; the upper portion of grinding container is equipped with the feed inlet, the bottom of grinding container is equipped with the discharge gate, the discharge gate is connected to the feed inlet through first conveying mechanism, the aperture of screen cloth is not greater than the external diameter of the slice metal powder of settlement.
According to the technical scheme, materials containing metal particles to be ground and grinding media are put into a grinding container and ground through a basket type sand mill, after the metal particles in the basket type sand mill are ground through a high-speed motion grinding ball, the metal particles are thrown out of gaps in the wall of the basket type sand mill and fall onto a screen positioned below the metal particles, small-size particles fall into the bottom of the grinding container through the screen holes and are conveyed into the basket type sand mill again through a first conveying mechanism, and the materials are circulated for many times until the required flaking size is achieved, so that the powder meeting the flaking requirement cannot be timely separated, and the problems of metal powder performance degradation, high energy consumption and low processing efficiency caused by excessive processing are solved.
Further, the first conveying mechanism is a conveying pump.
As a further improvement of the utility model, the grinding equipment is a basket type sand mill or a stirred ball mill provided with an upper center feeding and a discharge hole on the side surface.
Further, the grinding device is a basket type sand mill. Further preferably, the discharge port is connected to the feed port through a feed pipe, and the feed pipe passes through the feed port and is connected to a position near the center of the upper end of the basket sand mill.
As a further improvement of the utility model, the grinding online grading device of the flaky metal powder comprises a screening mechanism, the grinding container is provided with a flaky metal powder outlet, the flaky metal powder outlet is positioned on one side of the screen, the bottom of the flaky metal powder outlet is not lower than the top of the screen, and the flaky metal powder outlet is communicated with a feed inlet of the screening mechanism.
As a further improvement of the utility model, the bottom of the screening mechanism is provided with a screening outlet which is communicated with the feed inlet of the grinding container through a second conveying mechanism, and the aperture of the screen mesh of the screening mechanism is not larger than the set outer diameter of the sheet metal powder.
As a further improvement of the utility model, the screening mechanism is provided with a product outlet which is positioned above the screen of the screening mechanism and is connected with the storage bucket.
As a further improvement of the utility model, the screening mechanism is a vibrating screen; a scraping plate is arranged on the screen of the screening mechanism.
As a further improvement of the utility model, the sheet metal powder outlet and the screening outlet are respectively provided with a valve.
Further, a fourth valve is arranged between the flaky metal powder outlet and the feeding port of the screening mechanism.
Further, the screening outlet is provided with a fifth valve.
As a further improvement of the utility model, the mesh number of the screen is 100-1000 meshes; the mesh number of the screen mesh of the vibrating screen is 100-1000 meshes.
As a further improvement of the utility model, the grinding balls in the basket type sand mill are made of zirconia or stainless steel, and the diameter of the grinding balls is phi 0.5-5 mm.
The utility model also discloses a continuous production device of the flaky metal powder, which comprises a powder-liquid dispersion mixing mechanism and the online grinding grading device of the flaky metal powder, wherein an outlet of the powder-liquid dispersion mixing mechanism is communicated with a feed inlet of the grinding container.
As a further improvement of the utility model, the powder-liquid dispersing and mixing mechanism comprises a dispersing container, wherein a stirrer is arranged in the dispersing container; the dispersing container is provided with a discharge hole, and the discharge hole is connected with a feed inlet of the grinding container through a first conveying mechanism.
As a further improvement of the utility model, the powder-liquid dispersing and mixing mechanism comprises a powder container, and the powder container is connected with a feed inlet of the dispersing container through a powder-liquid mixer.
As a further improvement of the utility model, the powder container is a powder barrel, the powder barrel is connected with the powder-liquid mixer through a first conveying pipeline, and a first valve is arranged on the first conveying pipeline.
As a further improvement of the utility model, the dispersing container is connected with the first conveying mechanism through a second conveying pipeline, and a second valve is arranged on the second conveying pipeline; and a third valve is arranged between the outlet and the first conveying mechanism.
Compared with the prior art, the utility model has the beneficial effects that:
Firstly, compared with the technical scheme that the ball mill or the sand mill is adopted to prepare the flaky metal powder in the prior art, and then the sieving, cyclone grading or air flow grading method is adopted to grade the flaky metal powder with different sizes, the technical scheme of the utility model adopts the timely sieving after grinding, and continuously grinds the particles which cannot meet the requirements, so that the problems of over-machining and under-machining can be well avoided, the flaky metal powder which can meet the requirements can be timely separated on line, the metal powder which cannot be processed can leak through the screen and is continuously conveyed to the basket sand mill to be continuously ground, and the continuous on-line grading method greatly avoids the phenomena of crushing, cold welding and ball milling of the flaky metal powder, so that on one hand, the occurrence probability of various defects is reduced, the performance of the flaky metal powder is improved, on the other hand, the production efficiency is improved, and the energy consumption is reduced.
Secondly, the technical scheme of the utility model realizes a continuous production mode of the flaky metal powder, and has the advantages of stable process, simple operation, suitability for industrial mass production, and good product consistency and stability. Furthermore, the technical scheme of the utility model can adopt the modes of automatic powder suction and feeding, pipeline conveying and wet screen grading, so that the appearance of metal dust is better avoided, and the problems of health injury, dust explosion, equipment safety protection and the like caused by the metal dust are effectively avoided.
Drawings
Fig. 1 is a schematic structural view of an online classifying device for grinding sheet metal powder according to embodiment 1 of the present utility model.
Fig. 2 is a schematic structural view of a continuous production apparatus for flake nickel powder according to embodiment 2 of the present utility model.
FIG. 3 is an electron microscope image of the product obtained in example 2 of the present utility model.
The reference numerals include:
1-powder charging bucket, 2-powder-liquid mixer, 3-dispersion bucket, 4-high-speed mixer, 5-grinding bucket, 6-basket sand mill, 7-screen, 8-vibrating screen, 9-vibrating screen and 10-storage bucket;
11-a first delivery pump, 12-a second delivery pump;
21-first valve, 22-second valve, 23-third valve, 24-fourth valve, 25-fifth valve, 26-sixth valve.
Detailed Description
Preferred embodiments of the present utility model are described in further detail below.
Example 1
As shown in fig. 1, an online grinding classifying device for sheet metal powder comprises a grinding barrel 5, wherein a basket type sand mill 6 and a screen 7 are arranged in the grinding barrel 5, and the screen 7 is positioned below the basket type sand mill 6 to divide the grinding barrel 5 into an upper part and a lower part; the upper portion of the grinding barrel 5 is provided with a feed inlet, the bottom of the grinding barrel 5 is provided with a discharge outlet, the discharge outlet is connected to the feed inlet through a first delivery pump 21, and the aperture of the screen 7 is not greater than the outer diameter of the set sheet metal powder. The discharge gate passes through the feed inlet and connects the feed inlet, the feed pipe passes the feed inlet and is connected to the position that is close to the center of the upper end of basket sand mill.
Further, the grinding barrel 5 is provided with a sheet metal powder outlet, the sheet metal powder outlet is positioned on one side of the screen 7, the bottom of the sheet metal powder outlet is not lower than the top of the screen 7, and the sheet metal powder outlet is communicated with a feed inlet of the vibrating screen 8. The bottom of the vibrating screen 8 is provided with a screening outlet which is communicated with the feed inlet of the grinding barrel 5 through a second conveying pump 22, and the aperture of the vibrating screen mesh 9 is not larger than the set outer diameter of the sheet metal powder; the vibrating screen 8 is provided with a product outlet, the product outlet is positioned above the vibrating screen mesh 9, and the product outlet is connected with the storage vat 10. A fourth valve 24 is arranged between the flaky metal powder outlet and the feeding port of the vibrating screen 8. The screening outlet is provided with a fifth valve 25. The product outlet is provided with a sixth valve 26.
Further, the mesh number of the screen 7 is 100-1000 meshes; the mesh number of the screen mesh 9 of the vibrating screen is 100-1000 meshes.
Further, a scraping plate is arranged on the screen mesh 9 of the vibrating screen. By adopting the technical scheme, the product can be conveniently scraped off and collected from the screen 7 of the vibrating screen 8. Further preferably, the scraping plate is connected with a driving mechanism, and can automatically scrape products.
Example 2
As shown in fig. 2, the continuous production device of the flaky nickel powder comprises a powder barrel 1, a powder-liquid dispersion mixing mechanism and an online grinding grading device of the flaky metal powder, wherein the powder-liquid dispersion mixing mechanism comprises a dispersion barrel 3, and a high-speed stirrer 4 is arranged in the dispersion barrel 3.
Specifically, the powder bucket 1 is connected with the powder-liquid mixer 2 through a conveying pipeline, and a first valve 21 is arranged on the conveying pipeline. The powder-liquid mixer 2 is connected with the feed inlet of the dispersing barrel 3. The dispersing barrel 3 is connected with a feed inlet of the grinding barrel 5 through a first conveying pump 11, and a second valve 22 is arranged between the dispersing barrel 3 and the first conveying pump 11. A third valve 23 is arranged between the discharge port of the grinding barrel 5 and the first delivery pump 11.
By adopting the technical scheme, the powder barrel 1 is used for storing nickel powder to be ground; the powder-liquid mixer 2 generates vacuum in the process of conveying liquid, can suck nickel powder into the mixing cavity, and simultaneously shears and disperses the nickel powder in the liquid at high speed, thereby effectively avoiding the generation of dust; the primarily dispersed nickel powder is sent into a dispersing barrel 3 and is further dispersed under the action of a high-speed stirrer 4; the powder barrel 1, the powder-liquid mixer 2 and the dispersing barrel 3 are combined together to form a high-efficiency dispersing and mixing system, and the combined action of the powder-liquid mixer 2 and the high-speed mixer 4 can rapidly disperse the metal nickel powder in the grinding medium, so that the dispersing efficiency is improved, and dust flying is avoided. After the nickel powder is dispersed and mixed, the powder-liquid mixer 2 and the first valve 21 are closed, the second valve 22 and the first delivery pump 11 are opened, the nickel powder dispersed in the grinding medium is pumped into the basket type sand mill 6 arranged on the grinding barrel 5 through the first delivery pump 11, after the nickel powder is conveyed, the second valve 22 is closed, and the third valve 23 is opened. After the metal particles conveyed into the basket type sand mill 6 are ground by the high-speed moving grinding balls, the metal particles are thrown out of gaps in the wall of the basket type sand mill 6 and fall onto the screen 7, small particles pass through holes of the screen 7 and fall into the lower part of the grinding barrel 5, the small particles are pumped into the basket type sand mill 6 again by the first conveying pump 11, and the metal particles are circulated for a plurality of times until the required flaking size is achieved and is trapped on the screen 7. After grinding for a period of time, the fourth valve 24 is opened, so that the flaky nickel powder trapped on the screen 7 flows into the vibrating screen 8, nickel powder meeting the flaky requirement is more accurately separated under the action of the vibrating screen 8, the fifth valve 25 and the second conveying pump 12 are opened, and the nickel powder falling below the screen 7 of the vibrating screen 8 is continuously pumped into the basket type sand mill 6 for grinding treatment. Thus, after a period of time, the sixth valve 26 is opened, the nickel powder trapped on the screen 7 of the vibrating screen 8 is scraped into the storage barrel 10, and centrifuged and dried to obtain flaky nickel powder, the electron microscope picture of which is shown in fig. 3, and the flaky nickel powder has good flaking degree, uniform morphology and size and basically no broken small-size powder or lamination cold welding phenomenon.
The device of this embodiment has formed continuous production unit, can in time separate the powder that reaches the flaking requirement, has effectively avoided the excessive processing of metal particle, and product performance is good, and production energy consumption is low, efficient. More prominently, the continuous sheet metal processing mode is suitable for industrial mass production, and the product stability and consistency are good.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (9)
1. An on-line grinding grading device for sheet metal powder is characterized in that: the grinding device comprises a grinding container, wherein grinding equipment is arranged in the grinding container, a screen is arranged in the grinding container, and the screen is positioned below the grinding equipment; the upper part of the grinding container is provided with a feed inlet, the bottom of the grinding container is provided with a discharge outlet, the discharge outlet is connected to the feed inlet through a first conveying mechanism, and the aperture of the screen is not more than the outer diameter of the set sheet metal powder;
The grinding container is provided with a flaky metal powder outlet, the flaky metal powder outlet is positioned on one side of the screen, the bottom of the flaky metal powder outlet is not lower than the top of the screen, and the flaky metal powder outlet is communicated with a feed inlet of the screening mechanism;
The grinding equipment is a basket type sand mill or a stirred ball mill provided with upper center feeding and a discharge hole on the side surface.
2. The on-line classifying device for grinding sheet metal powder according to claim 1, wherein: the grinding device is a basket type sand mill, the discharge port is connected with the feed port through the feed pipe, and the feed pipe penetrates through the feed port to be connected to the position, close to the center, of the upper end of the basket type sand mill;
The bottom of the screening mechanism is provided with a screening outlet which is communicated with the feed inlet of the grinding container through a second conveying mechanism, and the aperture of a screen of the screening mechanism is not larger than the set outer diameter of the flaky metal powder;
the screening mechanism is provided with a product outlet, the product outlet is positioned above the screen mesh of the screening mechanism, and the product outlet is connected with the storage barrel.
3. The on-line classifying device for grinding sheet metal powder according to claim 2, wherein: the screening mechanism is a vibrating screen; a scraping plate is arranged on the screen of the screening mechanism.
4. The on-line classifying device for grinding sheet metal powder according to claim 2, wherein: the flaky metal powder outlets and the screening outlets are respectively provided with a valve;
The grinding balls in the basket type sand mill are made of zirconia or stainless steel, and the diameter of each grinding ball is phi 0.5-5 mm.
5. A continuous production device of sheet metal powder is characterized in that: the online grinding classification device for the sheet metal powder comprises a powder-liquid dispersing and mixing mechanism and the online grinding classification device for the sheet metal powder according to any one of claims 1-4, wherein an outlet of the powder-liquid dispersing and mixing mechanism is communicated with a feed inlet of the grinding container.
6. The continuous production apparatus for sheet metal powder according to claim 5, wherein: the powder-liquid dispersing and mixing mechanism comprises a dispersing container, and a stirrer is arranged in the dispersing container; the dispersing container is provided with a discharge hole, and the discharge hole is connected with a feed inlet of the grinding container through a first conveying mechanism.
7. The continuous production apparatus for sheet metal powder according to claim 6, wherein: the powder-liquid dispersing and mixing mechanism comprises a powder container, and the powder container is connected with a feed inlet of the dispersing container through a powder-liquid mixer.
8. The continuous production apparatus for sheet metal powder according to claim 7, wherein: the powder container is a powder barrel, the powder barrel is connected with the powder-liquid mixer through a first conveying pipeline, and a first valve is arranged on the first conveying pipeline.
9. The continuous production apparatus for sheet metal powder according to claim 7, wherein: the dispersing container is connected with the first conveying mechanism through a second conveying pipeline, and a second valve is arranged on the second conveying pipeline; and a third valve is arranged between the outlet and the first conveying mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322283240.4U CN221018533U (en) | 2023-08-23 | 2023-08-23 | Online grinding and grading device for sheet metal powder and continuous production device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322283240.4U CN221018533U (en) | 2023-08-23 | 2023-08-23 | Online grinding and grading device for sheet metal powder and continuous production device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN221018533U true CN221018533U (en) | 2024-05-28 |
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ID=91178844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322283240.4U Active CN221018533U (en) | 2023-08-23 | 2023-08-23 | Online grinding and grading device for sheet metal powder and continuous production device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221018533U (en) |
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2023
- 2023-08-23 CN CN202322283240.4U patent/CN221018533U/en active Active
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