CN111389729A - Upgrading processing grading device and method for micro powder - Google Patents
Upgrading processing grading device and method for micro powder Download PDFInfo
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- CN111389729A CN111389729A CN202010257221.2A CN202010257221A CN111389729A CN 111389729 A CN111389729 A CN 111389729A CN 202010257221 A CN202010257221 A CN 202010257221A CN 111389729 A CN111389729 A CN 111389729A
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- micro powder
- collector
- fan
- separator
- cyclone collector
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
- B04C2009/005—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external rotors, e.g. impeller, ventilator, fan, blower, pump
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Abstract
The invention discloses an upgrading processing grading device and method for micro powder, which comprises a primary micro powder collector, a secondary micro powder separator and a cyclone collector, wherein a uniform-speed distributor is arranged at the top of the primary micro powder collector and is connected with a feeding port of the primary micro powder collector, a raw material heater is arranged at the upper part of the uniform-speed distributor, a draught fan is connected onto the cyclone collector, a discharge port of the cyclone collector is arranged at the bottom of the cyclone collector, the raw material is dried and loosened by the raw material heater, impellers of a primary fan and a secondary fan rotate at high speed, the particles are subjected to centrifugal force generated by the impellers of a secondary fan, so that the particles with the particle size of more than 0.7 micron are thrown to the inner wall, slide down to the discharge port of the separator along the wall and are discharged, the draught fan is used for sucking the particles with the particle size of less than 0.7 micron into the, finally producing the micro powder with uniform granularity, no humidity, no material wrapping, no caking and good associativity.
Description
Technical Field
The invention relates to the field of solid powder classification, in particular to an upgrading processing and classifying device and method for micro powder.
Background
The silicon micropowder is an inorganic material with wide application, and has the characteristics of small heat conductivity coefficient, excellent dielectric property, small thermal expansion coefficient, corrosion resistance and the like. The silicon micropowder has excellent physical properties and stable chemical properties, and becomes one of important raw materials in many high and new technical fields. Currently, integrated circuits are being developed in a direction of high integration, high density, and miniaturization. 70-90% of epoxy molding compound used for packaging integrated circuits is silicon micropowder. Therefore, the content and the granularity of the silicon micropowder greatly influence the flowability of the epoxy molding compound and the packaging effect of the integrated circuit. For many years, fillers used for high-end electronic packaging all depend on import, the price is up to 40000-10000 yuan/ton, and hidden dangers are brought to the national economic development and safety.
The silicon micropowder is mainly used for producing integrated circuits, discrete devices and solar cells from semiconductors and solar cells. The traditional micro powder F2000 is produced by carrying out acid washing, alkali washing and water washing on a product by flow division and extraction by using a manual flowing water and manual material extraction processing technology, wherein one batch of materials can be finished in about 4-5 months, and the yield is about 1.5 ℃. The traditional process has the defects of serious environmental pollution, long cycle time, low yield, undefined timeliness, easy generation of caking and material package of products, influence on product quality and high consumption.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the upgrading processing grading device and the upgrading processing grading method for the micro powder, and when the device is applied, the produced product has uniform granularity, no moisture, no material wrapping, no caking and good associativity.
The invention is realized by the following technical scheme:
the utility model provides an upgrading processing grading plant and method for miropowder, includes one-level miropowder collector, second grade miropowder separator, cyclone collector, the feed opening of one-level miropowder collector is connected with the material loading mouth of second grade miropowder separator, be connected by the connecting pipe between the top of one-level miropowder collector, second grade miropowder separator and the cyclone collector, be provided with the one-level fan on the one-level miropowder collector, be provided with the second grade fan on the second grade miropowder separator, the bottom of second grade miropowder separator is provided with the separator bin outlet, the top of one-level miropowder collector is provided with at the uniform velocity distributing device, the at the uniform velocity distributing device is connected with the feed inlet of one-level miropowder collector, the, the upgrading processing grading method of the micro powder comprises the following steps:
(1) fully drying the moisture contained in the micro powder by a raw material heater to loosen the dried raw material, and controlling the blanking speed by a uniform-speed distributor to ensure uniform blanking;
(2) when the uniformly falling raw materials pass through the primary micro powder collector and the secondary micro powder separator, one third of an air inlet of the primary fan is firstly closed, three fourths of an air inlet of the secondary fan is closed, air is reduced, the primary fan and the secondary fan rotate at high speed by impellers, the maximum speed per hour is mentioned, particles are subjected to centrifugal force generated by the impellers of the extension machines, and the particles with the particle size of more than 0.7 micron are thrown to the inner wall, stalled and slide down to the discharge port of the separator along the wall to be discharged when passing through the centrifugal force generated by the primary fan and the secondary.
(3) When the particles with the particle size of more than 0.7 micrometer are separated, the particles with the particle size of less than 0.7 micrometer in the raw materials are absorbed into the cyclone collector by the centripetal force generated by the draught fan while the particles with the particle size of less than 0.7 micrometer are absorbed into the cyclone collector along with the gas-solid two-phase flow and collected.
Further, the connecting pipe is communicated with the cyclone collector along the tangential direction of the cyclone collector.
Further, an upgrading processing grading plant and a method for micro powder are provided, wherein the uniform speed distributor is arranged as follows: auger and chain plate machine.
Further, a grading device and a grading method for upgrading processing of micro powder are provided, wherein a screen is arranged between the raw material heater and the uniform-speed distributor.
Furthermore, the device and the method for upgrading, processing and grading the micro powder are characterized in that the connecting outlets of the first-stage micro powder collector, the second-stage micro powder separator and the cyclone collector are respectively provided with a screen.
At present, the traditional process has serious environmental pollution, long cycle time, low yield, indefinite time, easy caking and material package of products, influences on product quality and large consumption, so the application provides an upgrading and grading device and a method for micro powder, a new F2000 production process is obtained by continuous analysis, experiment, machine equipment modification and exploration on the traditional process technology, the new process adopts airflow volume division for grading, a heater is added to feeding equipment of a machine, the raw material of the F2000 is below 0.7 micron, the humidity and temperature are high, the caking and the material package are easy, the produced products have poor associativity and are easy to stick together, the raw material of the F2000 is loose and uniform in blanking by modifying the heating equipment, the blanking speed is controlled when grading is carried out, one third of a primary air inlet is closed, and three quarters of a secondary air inlet is closed, the particle size is reduced, forced air suction of the induced draft fan is used, the first-stage and second-stage fan impellers rotate at high speed (the maximum speed per hour is mentioned), the particles are subjected to centrifugal force generated by the grading impellers, the centripetal force generated by the induced draft fan is suction air, only the first-stage and second-stage impellers can be sucked away to generate particles separated by the centrifugal force, the particles below 0.7 micrometer are thrown to the inner wall to stall and slide to the receiving port along the wall when passing through the centrifugal force generated by the first-stage and second-stage impellers, and the particles below 0.7 micrometer enter the cyclone collector along with gas-solid two-phase flow to be collected.
In summary, the following beneficial effects of the invention are:
1. according to the upgrading processing grading device and method for the micro powder, the product produced by the method is uniform in granularity, free of moisture, material wrapping and caking and good in associativity.
2. According to the upgrading processing grading device and method for the micro powder, the raw materials are heated to be loosened due to the principle of wet bonding, and then the raw materials are further separated by combining a subsequent separator, so that the micro powder meeting the requirements is produced.
3. The invention relates to an upgrading processing grading device and method for micro powder, which can improve the grading precision and can grade materials with small particle size difference.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the present invention.
Reference numbers and corresponding part names in the drawings:
1-first-stage micro powder collector, 2-second-stage micro powder separator, 3-cyclone collector, 4-first-stage fan, 5-second-stage fan, 6-raw material heater, 7-uniform-speed distributor, 8-connecting pipe, 9-cyclone collector discharge outlet, 10-separator discharge outlet and 11-induced draft fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
As shown in figure 1, an upgrading processing grading device and method for micro powder is characterized by comprising a first-level micro powder collector 1, a second-level micro powder separator 2 and a cyclone collector 3, wherein a feed opening of the first-level micro powder collector 1 is connected with a feed opening of the second-level micro powder separator 2, the tops of the first-level micro powder collector 1 and the second-level micro powder separator 2 are connected with the cyclone collector 3 through a connecting pipe 8, a first-level fan 4 is arranged on the first-level micro powder collector 1, a second-level fan 5 is arranged on the second-level micro powder separator 2, a separator discharge opening 10 is arranged at the bottom of the second-level micro powder separator 2, a uniform-speed distributing device 7 is arranged at the top of the first-level micro powder collector 1, the uniform-speed distributing device 7 is connected with a feed opening of the first-level micro powder collector 1, a raw, the cyclone collector 3 is connected with an induced draft fan 11, the bottom of the cyclone collector 3 is provided with a discharge port 9 of the cyclone collector, and the upgrading, processing and grading method of the micro powder comprises the following steps:
firstly, fully drying moisture contained in micro powder by a raw material heater 6 to loosen the dried raw material, and controlling the blanking speed by a uniform-speed distributor 7 to ensure uniform blanking;
secondly, when the uniformly falling raw materials pass through the primary micro powder collector 1 and the secondary micro powder separator 2, one third of an air inlet of the primary fan 4 is firstly closed, three fourths of an air inlet of the secondary fan 5 is closed, air is reduced, the primary fan and the secondary fan rotate at high speed by impellers, the maximum speed per hour is increased, particles are subjected to centrifugal force generated by the auxiliary machine impellers, and the particles with the particle size of more than 0.7 micron are thrown to the inner wall to stall and slide down to the discharge port 10 of the separator along the wall to be discharged when passing through the centrifugal force generated by the primary fan and the secondary fan.
And finally, separating particles with the particle size of more than 0.7 micrometer while using forced air suction of the induced draft fan 11, sucking the particles with the particle size of less than 0.7 micrometer in the raw materials to the cyclone collector 3 by the centripetal force generated by the induced draft fan 11, and allowing the particles with the particle size of less than 0.7 micrometer to enter the cyclone collector 3 along with gas-solid two-phase flow to be collected.
Specifically, the connection pipe 8 communicates with the cyclone collector 3 in a tangential direction of the cyclone collector 3.
Specifically, the uniform velocity distributing device 7 is arranged as follows: auger and chain plate machine.
Specifically, a screen is arranged between the raw material heater 6 and the uniform-speed distributor 7.
Specifically, the first-stage micro powder collector 1, the second-stage micro powder separator 2 and the cyclone collector 3 are respectively provided with a screen at the connecting outlet.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The upgrading processing grading device and the method for the micro powder are characterized by comprising a first-level micro powder collector (1), a second-level micro powder separator (2) and a cyclone collector (3), wherein a feed opening of the first-level micro powder collector (1) is connected with a feed opening of the second-level micro powder separator (2), the tops of the first-level micro powder collector (1) and the second-level micro powder separator (2) are connected with the cyclone collector (3) through a connecting pipe (8), a first-level fan (4) is arranged on the first-level micro powder collector (1), a second-level fan (5) is arranged on the second-level micro powder separator (2), a separator discharge opening (10) is arranged at the bottom of the second-level micro powder separator (2), a uniform-speed distributing device (7) is arranged at the top of the first-level micro powder collector (1), and the uniform-speed distributing device (7) is connected with a feed opening, the upper portion of at uniform velocity distributing device (7) is provided with raw materials heater (6), be connected with draught fan (11) on cyclone collector (3), the bottom of cyclone collector (3) is provided with cyclone collector bin outlet (9), the upgrading processing classification method of miropowder is:
(1) the moisture contained in the micro powder is fully dried through a raw material heater (6) to enable the dried raw material to be loose, and the blanking speed is controlled through a uniform-speed distributor (7) to enable the blanking to be uniform;
(2) when the uniformly falling raw materials pass through the primary micro powder collector (1) and the secondary micro powder separator (2), firstly, one third of an air inlet of the primary fan (4) is closed, three fourths of an air inlet of the secondary fan (5) is used for reducing air, impellers of the primary fan and the secondary fan are used for rotating at high speed, the maximum speed per hour is increased, particles are subjected to centrifugal force generated by an impeller of the extension machine, and the particles with the particle size of more than 0.7 micron are thrown to the inner wall, stalled and slide down to a discharge port (10) of the separator along the wall to be discharged when passing through the centrifugal force generated by the primary impeller and;
(3) when particles with the particle size of more than 0.7 micrometer are separated, the particles with the particle size of less than 0.7 micrometer in the raw materials are absorbed into the cyclone collector (3) by the centripetal force generated by the draught fan (11) by using the forced air suction of the draught fan (11) at the same time, and the particles with the particle size of less than 0.7 micrometer enter the cyclone collector (3) along with the gas-solid two-phase flow to be collected.
2. The upgrading processing and grading device and method for micro powder according to claim 1, characterized in that the connecting pipe (8) is communicated with the cyclone collector (3) along the tangential direction of the cyclone collector (3).
3. The upgrading processing grading device and method for micropowder according to claim 1, characterized in that the uniform velocity distributor (7) is arranged as follows: auger and chain plate machine.
4. The upgrading processing and grading device and method for micro powder according to claim 1, wherein a screen is arranged between the raw material heater (6) and the uniform speed distributor (7).
5. The upgrading processing and grading device and method for micro powder according to claim 1, wherein the first micro powder collector (1), the second micro powder separator (2) and the cyclone collector (3) are provided with screens at the connecting outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257221.2A CN111389729A (en) | 2020-04-03 | 2020-04-03 | Upgrading processing grading device and method for micro powder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010257221.2A CN111389729A (en) | 2020-04-03 | 2020-04-03 | Upgrading processing grading device and method for micro powder |
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| Publication Number | Publication Date |
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| CN111389729A true CN111389729A (en) | 2020-07-10 |
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| CN202010257221.2A Pending CN111389729A (en) | 2020-04-03 | 2020-04-03 | Upgrading processing grading device and method for micro powder |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441533A (en) * | 2011-09-30 | 2012-05-09 | 中国中材国际工程股份有限公司 | Air uniform-distribution control system of density separator |
| CN203678696U (en) * | 2014-01-17 | 2014-07-02 | 汕头市泛世矿业股份有限公司 | Graded winnowing pulverizer |
| CN205887133U (en) * | 2016-07-29 | 2017-01-18 | 扬州锦盛微粉有限公司 | Miropowder grader |
| CN206514653U (en) * | 2017-01-24 | 2017-09-22 | 祝涵钰 | A kind of Chinese medicine drying plant |
| US20190009282A1 (en) * | 2016-01-08 | 2019-01-10 | Gea Process Engineering A/S | Powder drying system and method for recovering particles in such a system |
-
2020
- 2020-04-03 CN CN202010257221.2A patent/CN111389729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441533A (en) * | 2011-09-30 | 2012-05-09 | 中国中材国际工程股份有限公司 | Air uniform-distribution control system of density separator |
| CN203678696U (en) * | 2014-01-17 | 2014-07-02 | 汕头市泛世矿业股份有限公司 | Graded winnowing pulverizer |
| US20190009282A1 (en) * | 2016-01-08 | 2019-01-10 | Gea Process Engineering A/S | Powder drying system and method for recovering particles in such a system |
| CN205887133U (en) * | 2016-07-29 | 2017-01-18 | 扬州锦盛微粉有限公司 | Miropowder grader |
| CN206514653U (en) * | 2017-01-24 | 2017-09-22 | 祝涵钰 | A kind of Chinese medicine drying plant |
Non-Patent Citations (1)
| Title |
|---|
| 何东平: "《油脂制取及加工技术》", 31 July 2000, 湖北科学技术出版社 * |
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Application publication date: 20200710 |