CN200957455Y - Apparatus for producing metal ultramicro powder - Google Patents
Apparatus for producing metal ultramicro powder Download PDFInfo
- Publication number
- CN200957455Y CN200957455Y CN 200620079601 CN200620079601U CN200957455Y CN 200957455 Y CN200957455 Y CN 200957455Y CN 200620079601 CN200620079601 CN 200620079601 CN 200620079601 U CN200620079601 U CN 200620079601U CN 200957455 Y CN200957455 Y CN 200957455Y
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- atomizer
- catheter
- lavalle
- pulverization
- subsonic speed
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Abstract
A device for producing metal submicron powder comprises a pulverization tower, which is communicated with a vacuum pump and a melt liquid cavity. The melt liquid cavity is provided with a piston. Between the melt liquid cavity and pulverization tower is a compound pulverization nozzle composed of a subsonic speed pulverization nozzle and a Laval pulverization nozzle. The melt liquid cavity is communicated with the pulverization tower through a liquid tube. The subsonic speed pulverization nozzle and Laval pulverization nozzle are provided with a subsonic speed pulverization nozzle air inlet and a Laval pulverization nozzle inlet respectively. Meanwhile, the lower part of the Laval pulverization nozzle is connected with the cathode of an electric field dispersing device. With the double-polarity pulverization of double compound pulverization nozzles, the utility model realizes the effects of double layer split and ultrasonic speed sound wave vibrating metal liquid so as to obtain grains with smaller sizes; adding the electric field in the process of metal powder falling lowers the probability of metal powder agglomeration.
Description
Technical field
It is metallurgical that the utility model belongs to, and material and engineering field are specifically related to a kind of device for preparing the ultrafine metal powders body.
Technical background
The second-rate atomization of metal liquid stream is the common method of preparation metal dust.Use conventional monolayers two flow atomization devices at present, the powder average grain diameter that can make is 10～30 μ m.Chinese patent CN200420023889.7 utility model a kind of gases at high pressure atomizer, be used to prepare metal powder material, this utility model has adopted the wall of the wall of chamber, outside wall of air cavity and inboard chamber wall to form the structure of Laval jet pipe, and use gases at high pressure that metal liquid stream is atomized, this apparatus features is the powder preparation that can be adapted to materials with high melting point, all more than 10 μ m, energy consumption is also bigger simultaneously for the average grain diameter of the powder of preparation.Chinese patent CN01106868.X utility model the solid atomizing process of a kind of liquid metals and alloy, its feature is to compare with traditional second-rate atomization powder, granularity is thinner, the powder size narrowly distributing, the average grain diameter of the metallic tin powder of preparation is 36.69 μ m, but bigger with respect to the powder size of high pressure gas atomizing powder preparation.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, and a kind of particle diameter that can effectively reduce the atomizing powder is provided, and improves uniformity, recovery rate and the purity of powder, and atomizing effect prepares the device of metal ultrafine powder significantly.
For achieving the above object, the technical solution adopted in the utility model is: comprise atomisation tower, atomisation tower is connected with vavuum pump and liquation chamber respectively, be provided with a stopper rod in the liquation chamber, also be provided with the compound atomizer that constitutes by subsonic speed atomizer and Lavalle atomizer between liquation chamber and the atomisation tower, the liquation chamber is connected with atomisation tower by catheter, this catheter runs through subsonic speed atomizer and Lavalle atomizer, be respectively arranged with subsonic speed atomizer air inlet and Lavalle atomizer air inlet on subsonic speed atomizer and the Lavalle atomizer, the liquation chamber also is connected with the negative pole of electric field discrete device respectively with the subsonic speed atomizer, and the bottom of Lavalle atomizer links to each other with the positive pole of electric field discrete device simultaneously.
The lower end of atomisation tower of the present utility model also is provided with one and receives the powder device; The liquation chamber is a funnel-shaped structure, and the periphery in the liquation chamber is provided with the heater wire bag, and liquation is provided with thermocouple in the chamber; The subsonic speed atomizer is 0 °-20 ° near the angle α of the madial wall of catheter, and the angle β of lateral wall is 30 °-60 °; The Lavalle atomizer is the circular seam type structure, the Lavalle atomizer is 30 °-60 ° near the angle theta of the madial wall of catheter, and the ratio of the slit width b at the slit width a at atomizer minimum widith place, Lavalle and maximum width place is 1: 1-1: 5; Subsonic speed atomizer and Lavalle atomizer all have 2～4 air inlets, and the direction of air inlet is identical; Catheter comprises catheter and following catheter, and the internal diameter of following catheter is greater than the internal diameter of last catheter, and leaves gap 0-10mm up and down between the catheter.
The utility model adopts the mode of the bipolar atomizing of two-layer compound atomizer, and traditional aerosolization structure is adopted on the upper strata, and lower floor adopts the Laval nozzle structure, has realized double-deck effect of tearing with supersonic speed sound wave exciting molten metal; And the employing adulterated powder, and adopt the scroll structure, both can improve the uniformity of mixing of solid and gas, can improve the momentum of vortical flow again, increase the impulsive force of air-flow to molten metal, tear up thereby reach the degree of depth, with the littler particle of acquisition particle diameter; Use the skin effect of metal-powder electric charge in addition, increase electric field by spraying in the dropping process at metal-powder, the youngster who reduces the metal-powder reunion leads.
Description of drawings
Fig. 1 is the general structure schematic diagram of the utility model atomising device;
Fig. 2 is the structural representation of the utility model liquation chamber 6 and compound atomizer;
Fig. 3 is the structural representation of the utility model subsonic speed atomizer 4;
Fig. 4 is the structural representation of the utility model Lavalle atomizer 2;
Fig. 5 is the vertical view of the utility model subsonic speed atomizer 4;
Fig. 6 is the structural representation of the utility model catheter 8;
Fig. 7 adopts the ultrafine metal powders body of device preparation of the present utility model by the Ma Er Zeta type nano particle size of Ma Erwen company manufacturing and the analysis result of Zeta potential analyzer, and wherein abscissa is the particle diameter of powder; Ordinate is the percentage composition of powder.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to Fig. 1, the utility model comprises atomisation tower 10, the inlet of atomisation tower 10 is connected with liquation chamber 6 by the compound atomizer that is made of subsonic speed atomizer 4 and Lavalle atomizer 2, the lower end of atomisation tower 10 is connected with vavuum pump 1, be provided with a stopper rod 7 in the liquation chamber 6, between liquation chamber 6 and atomisation tower 10, also be provided with the catheter 8 that runs through subsonic speed atomizer 4 and Lavalle atomizer 2, be respectively arranged with subsonic speed atomizer air inlet 5 and Lavalle atomizer air inlet 3 on subsonic speed atomizer 4 and the Lavalle atomizer 2, liquation chamber 6 also is connected with the negative pole of electric field discrete device 9 respectively with subsonic speed atomizer 4, and the bottom of Lavalle atomizer 2 links to each other with the positive pole of electric field discrete device 9 simultaneously.
Referring to Fig. 2, liquation of the present utility model chamber 6 is a funnel-shaped structure, and the periphery in liquation chamber 6 is provided with heater wire bag 14, be provided with thermocouple 15 in the liquation chamber 6, the utility model has adopted the mode of the bipolar atomizing of double-deck atomizer, and ground floor adopts traditional subsonic speed atomizer 4, and the second layer adopts circular seam type Lavalle atomizer 2, its nozzle section amasss in the subsonic speed section and shrinks, and expands behind critical cross-section.Adopting Laval nozzle 2 is in order to realize the supersonic atomization of metal-powder.Adopt the mode of double-deck atomizer, realized double-deck effect of tearing with supersonic speed sound wave exciting molten metal.The mode of the compound atomizing of gas-solid feeds pressed powder (as NaCl, KCl etc.) and inert gas, and feed high-pressure inert gas in Lavalle atomizer 2 in subsonic speed atomizer 4, the atomizing medium that adopts in test is N usually
2, than traditional atomising device, behind the interpolation pressed powder, the density of gas improves greatly, and the momentum of gas increases, thereby the impulsive force of liquid stream is improved; Simultaneously, the solid that is added can also directly pour the inside of metal liquid stream, makes liquid stream be torn more fully.Under this effect aspect two, powder size reduces greatly, makes the recovery rate of fine powder be improved.In addition, behind the interpolation pressed powder, the disturbance of air-flow operation reduces, and more liquid stream is impacted in the concentrated area, makes that the powder size distribution is more concentrated.
Referring to Fig. 3, subsonic speed atomizer 4 is 0 °-20 ° near the angle α of the madial wall of catheter 8, and the angle β of lateral wall is 30 °-60 °.
Referring to Fig. 4, Lavalle atomizer 2 is 30 °-60 ° with the angle theta of the madial wall of catheter 8, and the ratio of the slit width a at Lavalle atomizer 2 minimum widith places and the slit width b at maximum width place is 1: 1-1: 5.
Referring to Fig. 5, the air-flow of double-deck nozzle of the present utility model adopts spiral vortex type to flow, because spiral structure can provide bigger air-flow power, and considers in the time of will adding solid particle to air chamber, adopts the spiral vortex type structure that solid and gas are mixed evenly.Air inlet of the present utility model is 2～4, and the stream swirl direction of double-deck nozzle is identical,, and avoids under the stream swirl direction reverse situation loss of the energy that two strands of airflow counter-collisions cause increasing the shear action of air-flow to metal liquid stream.
Referring to Fig. 6, catheter 8 of the present utility model has adopted the form of segmented, the internal diameter of following catheter 13 is greater than the internal diameter of last catheter 12, can guarantee not bump down from the motlten metal that last catheter 12 flows out the inwall of catheter 13, it fixedly is to guarantee by the interference fits with subsonic speed atomizer 4 centre bores.Leave gap 0-10mm up and down between the catheter, prevent down that the low temperature of catheter 13 is passed to catheter 12, cause obstruction, simultaneously, when preventing 6 heating of liquation chamber, upper end, heat is passed to down catheter 13 fast, causes heat to scatter and disappear in a large number.Outside the reason of heat extraction conduction, effectively produce underbalance effect simultaneously, reach the purpose of drainage, make liquid under the effect of negative-pressure sucking, successfully in funnel, flow down.
The course of work of the present utility model is as follows: at first vacuumize by 1 pair of atomisation tower 10 of vavuum pump, and then inert gas is charged in the atomisation tower 10; Secondly metal to be prepared is placed liquation chamber 6 to carry out melting and make it fusing, again the inert gas of 0.2MPa～5Mpa and slaine powder are fed in the subsonic speed atomizers 4 by subsonic speed atomizer air inlet 5 jointly, the inert gas of 0.2MPa～5Mpa is fed in the Lavalle atomizers 2 by Lavalle atomizer air inlet 3; Opening stopper rod 7 allows molten metal bath flow in the atomisation tower 10 downwards along catheter 8, inert gas then carries out the bilayer atomizing by the molten metal of subsonic speed atomizer 4 and 2 pairs of outflows of Lavalle atomizer catheter 8, realization is torn and supersonic speed sound wave exciting the bilayer of molten metal, in the process of atomizing, 9 pairs of molten drops of electric field discrete device disperse, molten metal is rapidly solidificated into metal dust through atomization process, by receiving powder device 11, the metal that generates is collected at last.
Referring to Fig. 7, adopt the metal-powder of device preparation of the present utility model to adopt 0.7MPa at the pressure that atomizing scolding tin advances the upper strata atomizer, lower floor's pressure adopts 0.4MPa, 167 ℃ of the metal degrees of superheat, detect by Ma Erwen Zeta, use this equipment can make particle diameter less than 8 μ m reach 75%, average grain diameter is 1.7612 μ m, the primary peak value in the grading curve reaches about 500nm.
The utility model utilization electric field dispersion technology is in order to reduce the possibility that metal dust is reunited.At liquation chamber 6 and subsonic speed atomizer 4 logical 200-300V direct currents, electrode is for negative, and each droplet when making the molten metal bath atomizing all has negative electrical charge, adds a battery lead plate in the nozzle bottom simultaneously, and electrode forms a stronger electric field for just; Electronegative minute metallic drop is by behind the positive plate, because electronegative and second more weak electric field of positive plate formation.Under normal conditions, droplet has to be broken up fast, and------polymerization---is broken up a series of compound movement state such as---collision---polymerization etc. in collision, and after the utilization electric field technology, make uniform electric charge only be distributed in the outer surface of spheroid, the electric field skin effect makes between each molten drop mutually exclusive.Increase electric field by spraying in the dropping process, reduce the probability that metal-powder is reunited at metal-powder.
Claims (7)
1, a kind of device for preparing metal ultrafine powder, comprise atomisation tower (10), atomisation tower (10) is connected with vavuum pump (1) and liquation chamber (6) respectively, be provided with a stopper rod (7) in the liquation chamber (6), it is characterized in that: also be provided with the compound atomizer that constitutes by subsonic speed atomizer (4) and Lavalle atomizer (2) between said liquation chamber (6) and the atomisation tower (10), liquation chamber (6) is connected with atomisation tower (10) by catheter (8), this catheter (8) runs through subsonic speed atomizer (4) and Lavalle atomizer (2), be respectively arranged with subsonic speed atomizer air inlet (5) and Lavalle atomizer air inlet (3) on subsonic speed atomizer (4) and the Lavalle atomizer (2), liquation chamber (6) also is connected with the negative pole of electric field discrete device (9) respectively with subsonic speed atomizer (4), and the bottom of Lavalle atomizer (2) links to each other with the positive pole of electric field discrete device (9) simultaneously.
2, the device of preparation metal ultrafine powder according to claim 1 is characterized in that: the lower end of said atomisation tower (10) also is provided with one and receives powder device (11).
3, the device of preparation metal ultrafine powder according to claim 1 is characterized in that: said liquation chamber (6) is a funnel-shaped structure, and the periphery in liquation chamber (6) is provided with heater wire bag (14), is provided with thermocouple (15) in liquation chamber (6).
4, the device of preparation metal ultrafine powder according to claim 1 is characterized in that: said subsonic speed atomizer (4) is 0 °-20 ° near the angle α of the madial wall of catheter (8), and the angle β of lateral wall is 30 °-60 °.
5, the device of preparation metal ultrafine powder according to claim 1, it is characterized in that: said Lavalle atomizer (2) is the circular seam type structure, Lavalle atomizer (2) is 30 °-60 ° near the angle theta of the madial wall of catheter (8), and the ratio of the slit width b at the slit width a at Lavalle atomizer (2) minimum widith place and maximum width place is 1: 1-1: 5.
6, the device of preparation metal ultrafine powder according to claim 1 is characterized in that: said subsonic speed atomizer (4) and Lavalle atomizer (2) all have 2～4 air inlets, and the direction of air inlet is identical.
7, the device of preparation metal ultrafine powder according to claim 1, it is characterized in that: said catheter (8) comprises catheter (12) and following catheter (13), the internal diameter of following catheter (13) is greater than the internal diameter of last catheter (12), and leaves gap 0-10mm up and down between the catheter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620079601 CN200957455Y (en) | 2006-08-18 | 2006-08-18 | Apparatus for producing metal ultramicro powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620079601 CN200957455Y (en) | 2006-08-18 | 2006-08-18 | Apparatus for producing metal ultramicro powder |
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| Publication Number | Publication Date |
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| CN200957455Y true CN200957455Y (en) | 2007-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620079601 Expired - Lifetime CN200957455Y (en) | 2006-08-18 | 2006-08-18 | Apparatus for producing metal ultramicro powder |
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| CN (1) | CN200957455Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413617C (en) * | 2006-08-18 | 2008-08-27 | 陕西科技大学 | Device for preparing metal ultrafine powder and its method |
| CN102029397A (en) * | 2011-01-26 | 2011-04-27 | 河南理工大学 | Airflow atomizing nozzle device suitable for metal composite atomizer |
| CN102202821A (en) * | 2008-11-04 | 2011-09-28 | 尤米科尔股份公司及两合公司 | Device and method for granulation of a metal melt |
| CN102554246A (en) * | 2012-02-29 | 2012-07-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN106493377A (en) * | 2016-12-29 | 2017-03-15 | 哈尔滨三地增材制造材料有限公司 | Annular arrangement collision type aerodynamic atomization titanium alloy powder producing equipment and preparation method |
| CN107052354A (en) * | 2017-06-13 | 2017-08-18 | 河北工业大学 | A kind of device and method for preparing high sphericity 3D printing refractory metal powder |
| CN107716934A (en) * | 2017-09-28 | 2018-02-23 | 上海材料研究所 | A kind of preparation method of Inconel718 alloy powders for 3D printing technique |
| CN108817410A (en) * | 2018-07-27 | 2018-11-16 | 昆明冶金研究院 | A kind of gas atomization pulverization device being used to prepare submicron particle |
| CN113145854A (en) * | 2021-06-10 | 2021-07-23 | 江苏智仁景行新材料研究院有限公司 | Vacuum electrode induction melting double-flow gas atomization metal powder device |
-
2006
- 2006-08-18 CN CN 200620079601 patent/CN200957455Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413617C (en) * | 2006-08-18 | 2008-08-27 | 陕西科技大学 | Device for preparing metal ultrafine powder and its method |
| CN102202821B (en) * | 2008-11-04 | 2014-01-08 | 尤米科尔股份公司及两合公司 | Device and method for granulation of a metal melt |
| CN102202821A (en) * | 2008-11-04 | 2011-09-28 | 尤米科尔股份公司及两合公司 | Device and method for granulation of a metal melt |
| CN102029397A (en) * | 2011-01-26 | 2011-04-27 | 河南理工大学 | Airflow atomizing nozzle device suitable for metal composite atomizer |
| CN102029397B (en) * | 2011-01-26 | 2012-07-25 | 河南理工大学 | Airflow atomizing nozzle device suitable for metal composite atomizer |
| CN102554246B (en) * | 2012-02-29 | 2015-02-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN102554246A (en) * | 2012-02-29 | 2012-07-11 | 上海应用技术学院 | Totally-enclosed gas-atomizing powder preparation device for solving blockage of nozzle and liquid guiding pipe caused by high-melting-point material |
| CN106493377A (en) * | 2016-12-29 | 2017-03-15 | 哈尔滨三地增材制造材料有限公司 | Annular arrangement collision type aerodynamic atomization titanium alloy powder producing equipment and preparation method |
| CN106493377B (en) * | 2016-12-29 | 2018-05-11 | 哈尔滨三地增材制造材料有限公司 | Annular arrangement collision type aerodynamic atomization titanium alloy powder producing equipment and preparation method |
| CN107052354A (en) * | 2017-06-13 | 2017-08-18 | 河北工业大学 | A kind of device and method for preparing high sphericity 3D printing refractory metal powder |
| CN107052354B (en) * | 2017-06-13 | 2019-04-12 | 河北工业大学 | A kind of device and method preparing high sphericity 3D printing refractory metal powder |
| CN107716934A (en) * | 2017-09-28 | 2018-02-23 | 上海材料研究所 | A kind of preparation method of Inconel718 alloy powders for 3D printing technique |
| CN108817410A (en) * | 2018-07-27 | 2018-11-16 | 昆明冶金研究院 | A kind of gas atomization pulverization device being used to prepare submicron particle |
| CN113145854A (en) * | 2021-06-10 | 2021-07-23 | 江苏智仁景行新材料研究院有限公司 | Vacuum electrode induction melting double-flow gas atomization metal powder device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060818 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |