CN103658667A - Atomizer for preparing fine metal powder body - Google Patents
Atomizer for preparing fine metal powder body Download PDFInfo
- Publication number
- CN103658667A CN103658667A CN201310567954.6A CN201310567954A CN103658667A CN 103658667 A CN103658667 A CN 103658667A CN 201310567954 A CN201310567954 A CN 201310567954A CN 103658667 A CN103658667 A CN 103658667A
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- China
- Prior art keywords
- nozzle
- liquid feeding
- feeding end
- metal powder
- atomizer
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- 239000000843 powder Substances 0.000 title claims abstract description 30
- 229910001111 Fine metal Inorganic materials 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 210000001163 endosome Anatomy 0.000 claims description 13
- 210000002583 cell-derived microparticle Anatomy 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract description 17
- 239000007789 gas Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000000889 atomisation Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009689 gas atomisation Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Abstract
The invention discloses an atomizer for preparing a fine metal powder body. The atomizer comprises an outer nozzle body (1), an inner nozzle body (2) and a flow guide pipe body (6). An air cavity (3) is arranged between the outer nozzle body (1) and the inner nozzle body (2). Air inlets (2) of the air cavity (3) are distributed in the periphery of the outer nozzle body. A spraying pipe (5) is arranged in the inner nozzle body and the flow guide pipe body is embedded in the spraying pipe in a sleeved mode. The spraying pipe is a symmetric multiple-loop pipe type Laval spraying pipe and the spraying pipe and the flow guide pipe body are installed at the center of the inner nozzle body. The flow guide pipe body is of a spilt two-section three-part structure and is composed of a liquid guide pipe (7) located on the lower portion, a liquid inlet end (8) and a liquid inlet end outer sleeve (9), wherein the liquid inlet end (8) and the liquid inlet end outer sleeve are located on the upper portion. By means of the atomizer for preparing the fine metal powder body, molten metal in a flow guide pipe is effectively prevented from being cooled by atomized supersonic-speed low-temperature gases so as to prevent a fluid guide pipe from being plugged. Meanwhile, installation or replacement of the flow guide pipe is facilitated and production efficiency and economic benefits are effectively improved.
Description
Technical field
The present invention relates to a kind of device that utilizes gas atomization molten metal to manufacture refining metallic powder, specifically a kind of fine metal powder atomizer of preparing.
Background technology
In the prior art, gas atomization technology is the main method of producing metal dust.Atomized powder has that sphericity is high, powder size is controlled, oxygen content is low and the advantage such as production cost is low, therefore, gas atomization technology not only provides the raw material of high-quality for powder metallurgy industry, also for using other relevant industries of metal dust, as the industries such as spraying, surfacing, scolder provide metal and the alloy powder of high-quality.
The basic principle of gas atomization is the process that with supersonic airstream, liquid metal stream is ground into little liquid and is frozen into powder.Its core is to control the mechanism of gas to metal liquid stream, makes the kinetic energy of air-flow be converted into greatest extent the surface energy of new fecula.
At present, atomizer is carried out to improved technology a lot, be mainly divided into restraint-type and unrestricted formula.Restraint-type refers to that molten metal relies on the moving effect of suction of high-speed gas, arrives atomization point.Metal liquid stream velocity ratio is more steady, and in atomization process, energy transmission is even, is conducive to obtain the fine powder of narrow particle size distribution.The phenomenon but nozzle is easily gaged somebody, on wanting to produce the fine powder of narrow particle size distribution, not affect again production efficiency be a difficult problem for this.Unrestricted formula refers to that metal liquid stream exports between atomizing medium engagement point from catheter, relies on the unconfined free-falling of self gravitation of metal liquid stream.Its shortcoming is that gas is sailed against the current along catheter when atomization gas air pressure is greater than fluid pressure, forms bubbling phenomenon, cause the unstable even atomization of liquid stream to stop, and the prepared metal-powder particle diameter of this free fall style nozzle is larger, and fine powder yield is few, and product profit is low.
Summary of the invention
The problem existing for above-mentioned prior art, the invention provides a kind of fine metal powder atomizer of preparing, and prevents the clogging of atomizer nozzle, is convenient to installation or the replacing of mozzle simultaneously, effectively enhances productivity and economic benefit.
To achieve these goals, this is prepared fine metal powder and comprises nozzle ectosome, nozzle endosome and diversion tube with atomizer;
Between described nozzle ectosome and nozzle endosome, be provided with air cavity, the air inlet of air cavity is distributed in nozzle ectosome around; Described nozzle endosome is provided with jet pipe, and described diversion tube is nested in jet pipe, and described jet pipe is symmetrical many annular tube types Laval nozzle, and described jet pipe and diversion tube are installed on the center of nozzle endosome;
Described diversion tube is that split type two section of three part-structure forms, and by being positioned at the catheter of bottom and superposed liquid feeding end and liquid feeding end overcoat, forms, and the middle part of described catheter is liquation runner.
The Outlet Section of described diversion tube apart from the length of the Outlet Section of jet pipe in 0-20mm.
Described catheter, liquid feeding end and liquid feeding end overcoat all adopt the material high temperature resistant, pyroconductivity is low to make.
Between described catheter and liquid feeding end, pass through high-temperature-resistant thermal-insulation material seal.
Between described liquid feeding end and liquid feeding end overcoat, be filled with high-temperature-resistant thermal-insulation material.
Compared with prior art, this prepares the atomizer symmetrical many annular tube types Laval nozzle of employing and split type diversion tube for fine metal powder.Atomizer can form the air curtain of one taper from nozzle hole to gas joint after passing into Compressed Gas, the steady air current in cone now, and in mozzle, form negative pressuren zone, guarantee that molten metal enters atomization disintegrating area with stable flow, to obtain the metal-powder of narrower particle size distribution; Catheter adopts with liquid feeding end the material that identical high temperature heat-resistant conductivity is low, liquid feeding end overcoat adopts exotic material to make, in the middle of liquid feeding end and liquid feeding end overcoat, be filled with high-temperature-resistant thermal-insulation material (as silicate aluminum board), and select silicate aluminum board to seal at catheter and liquid feeding end seal groove place.
This is prepared fine metal powder and passes through to change atomizer and nozzle arrangements with atomizer, and nozzle is selected to the low material of high temperature heat-resistant conductivity, can effectively prevent cooling to molten metal in mozzle of atomization supersonic speed cryogenic gas, thereby prevent the phenomenon that catheter stops up, produce narrow particle size distribution, metal-powder that fineness is less; Adopt split type diversion tube simultaneously, be very easy to installation or the replacing of mozzle, effectively improved production efficiency and economic benefit.
Accompanying drawing explanation
Fig. 1 is agent structure cutaway view of the present invention;
Fig. 2 is the cutaway view Amplified image of diversion tube in the present invention.
In figure: 1, nozzle ectosome, 2, air inlet, 3, air cavity, 4, nozzle endosome, 5, jet pipe, 6, diversion tube, 7, catheter, 8, liquid feeding end, 9, liquid feeding end overcoat, 10, liquation runner.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As depicted in figs. 1 and 2, this is prepared fine metal powder and comprises nozzle ectosome 1, nozzle endosome 4 and diversion tube 6 with atomizer;
Between described nozzle ectosome 1 and nozzle endosome 4, be provided with air cavity 3, the air inlet 2 of air cavity 3 is distributed in nozzle ectosome 1 around; Described nozzle endosome 4 is provided with jet pipe 5, and described diversion tube 6 is nested in jet pipe 5, and described jet pipe 5 is symmetrical many annular tube types Laval nozzle, and described jet pipe 5 and diversion tube 6 are installed on the center of nozzle endosome 4; Laval nozzle is Laval jet pipe, the present invention adopts speed that this structure of many annular tube types Laval nozzle can make air-flow to change because of the variation of the interior spray sectional area of jet pipe 5, air-flow is accelerated as converging at same joint after supersonic airstream, realized the atomization preparation to metal-powder.
Described diversion tube 6 is that split type two section of three part-structure forms, and by being positioned at the catheter 7 of bottom and superposed liquid feeding end 8 and liquid feeding end overcoat 9, forms, and the middle part of described catheter 7 is liquation runner 10.
Further, the Outlet Section of described diversion tube 6 apart from the length of the Outlet Section of jet pipe 5 in 0-20mm, to reduce the gag somebody generation of situation and molten metal is controlled in effective atomization region of molten metal condensation.
As preferably, described catheter 7, liquid feeding end 8 all adopt the material high temperature resistant, pyroconductivity is low to make with liquid feeding end overcoat 9, as adopted graphite, zirconia and soapstone etc., also can adopt other similarly low materials of high temperature resistant, pyroconductivity.
As preferably, between described catheter 7 and liquid feeding end 8, by high-temperature-resistant thermal-insulation material seal, as adopted silicate aluminum board as encapsulant, also can adopt other similar high-temperature-resistant thermal-insulation materials as sealing.
As preferably, between described liquid feeding end 8 and liquid feeding end overcoat 9, be filled with high-temperature-resistant thermal-insulation material, if alumina silicate is as packing material, also can adopt other similar high-temperature-resistant thermal-insulation materials.
Atomizer of the present invention accelerates as after supersonic airstream by jet pipe 5 passing into Compressed Gas, gas is by one taper air curtain of formation and be intersected in same point, the steady air current in cone air curtain now, and at the interior formation negative pressuren zone of diversion tube 6, guarantee that molten metal enters atomization disintegrating area with stable flow, to obtain the metal-powder of narrower particle size distribution.
Supersonic airstream by 5 ejections of many annular tube types of symmetry Laval nozzle impacts into the liquation of outflow tiny drop and is cooled to rapidly metal-powder, simultaneously, due to catheter 7 high temperature resistant, the material that pyroconductivity low identical with liquid feeding end 8 employings, can effectively prevent that in catheter 7, metal liquid stream is stopped up the phenomenon of catheter 7 by extremely cold gas cooled; Even if there is catheter 7 phenomenon of gaging somebody, because atomizer and drain body 6 are split type, nozzle ectosome 1 can be removed and taken out catheter 7 and then it is dredged or be changed, convenient to operation, can effectively ensure the continuity of production.
This prepares fine metal powder can effectively prevent cooling to molten metal in mozzle of atomization supersonic speed cryogenic gas with atomizer, thereby prevents the phenomenon that catheter stops up; Be convenient to installation or the replacing of mozzle simultaneously, effectively improved production efficiency and economic benefit.
Claims (5)
1. prepare a fine metal powder atomizer, comprise nozzle ectosome (1), nozzle endosome (4) and diversion tube (6);
It is characterized in that, between described nozzle ectosome (1) and nozzle endosome (4), be provided with air cavity (3), the air inlet (2) of air cavity (3) is distributed in nozzle ectosome (1) around; Described nozzle endosome (4) is provided with jet pipe (5), described diversion tube (6) is nested in jet pipe (5), described jet pipe (5) is symmetrical many annular tube types Laval nozzle, and described jet pipe (5) and diversion tube (6) are installed on the center of nozzle endosome (4);
Described diversion tube (6) is that split type two section of three part-structure forms, and by the catheter (7) and superposed liquid feeding end (8) and liquid feeding end overcoat (9) formation that are positioned at bottom, the middle part of described catheter (7) is liquation runner (10).
2. a kind of fine metal powder atomizer of preparing according to claim 1, is characterized in that, the Outlet Section of described diversion tube (6) apart from the length of the Outlet Section of jet pipe (5) in 0-20mm.
3. a kind of fine metal powder atomizer of preparing according to claim 1, is characterized in that, described catheter (7), liquid feeding end (8) all adopt the material high temperature resistant, pyroconductivity is low to make with liquid feeding end overcoat (9).
4. according to a kind of fine metal powder atomizer of preparing described in claim 1 or 3, it is characterized in that, between described catheter (7) and liquid feeding end (8), pass through high-temperature-resistant thermal-insulation material seal.
5. a kind of fine metal powder atomizer of preparing according to claim 1, is characterized in that, between described liquid feeding end (8) and liquid feeding end overcoat (9), is filled with high-temperature-resistant thermal-insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567954.6A CN103658667B (en) | 2013-11-14 | 2013-11-14 | One prepares fine metal powder body nebulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567954.6A CN103658667B (en) | 2013-11-14 | 2013-11-14 | One prepares fine metal powder body nebulizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103658667A true CN103658667A (en) | 2014-03-26 |
| CN103658667B CN103658667B (en) | 2017-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310567954.6A Active CN103658667B (en) | 2013-11-14 | 2013-11-14 | One prepares fine metal powder body nebulizer |
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| Country | Link |
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| CN (1) | CN103658667B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018010584A1 (en) * | 2016-07-13 | 2018-01-18 | 深圳市知赢科技有限公司 | System for preparing powder by means of gas phase and liquid phase |
| CN111195731A (en) * | 2020-01-10 | 2020-05-26 | 上海电气集团股份有限公司 | Bottom hole type crucible induction melting gas atomization powder making device and method |
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| JP2007511728A (en) * | 2003-11-13 | 2007-05-10 | ザ・ビーオーシー・グループ・ピーエルシー | Liquid cooling |
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| CN202861405U (en) * | 2012-11-16 | 2013-04-10 | 广州有色金属研究院 | Atomizer for preparation of metal or alloy powder |
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2013
- 2013-11-14 CN CN201310567954.6A patent/CN103658667B/en active Active
Patent Citations (8)
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| JP2007511728A (en) * | 2003-11-13 | 2007-05-10 | ザ・ビーオーシー・グループ・ピーエルシー | Liquid cooling |
| US7827822B2 (en) * | 2007-07-25 | 2010-11-09 | Schott Corporation | Method and apparatus for spray-forming melts of glass and glass-ceramic compositions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018010584A1 (en) * | 2016-07-13 | 2018-01-18 | 深圳市知赢科技有限公司 | System for preparing powder by means of gas phase and liquid phase |
| CN111195731A (en) * | 2020-01-10 | 2020-05-26 | 上海电气集团股份有限公司 | Bottom hole type crucible induction melting gas atomization powder making device and method |
| CN111195731B (en) * | 2020-01-10 | 2023-03-24 | 上海电气集团股份有限公司 | Bottom hole type crucible induction melting gas atomization powder making device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103658667B (en) | 2017-01-04 |
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Address after: 223800 Suqian province high tech Development Zone, Jiangshan Road, No. 23, No. Patentee after: Jiangsu Bo move new materials Limited by Share Ltd Address before: 223800 Huashan Road, Suyu Economic Development Zone, Jiangsu, No. 109, No. Patentee before: Jiangsu Boqian New Materials Co., Ltd. |
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