CN102489712B - Atomizer and application thereof - Google Patents
Atomizer and application thereof Download PDFInfo
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- CN102489712B CN102489712B CN201110452080.0A CN201110452080A CN102489712B CN 102489712 B CN102489712 B CN 102489712B CN 201110452080 A CN201110452080 A CN 201110452080A CN 102489712 B CN102489712 B CN 102489712B
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- metal
- coating
- atomizer
- mozzle
- heater
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Abstract
The invention discloses an atomizer. The atomizer comprises a honeycomb duct, a metal jacket, a nozzle, a heating element, a ceramic sealing ring and the like, wherein a clearance is reserved between the honeycomb duct and the metal jacket; the heating element is arranged in the clearance; the inner surface of the metal jacket is provided with a metal reflective film or a sprayed reflective coating; one end of the metal jacket is tapered into an outer conical body from up to down from the position between one third and one half near an outlet of the lower end, and the lower end of the metal jacket is flush with the honeycomb duct; and the clearance between the outer conical body of the metal jacket and an outlet of the lower end of the honeycomb duct is sealed by the ceramic sealing ring. The atomizer can effectively prevent metals and alloys from blocking, so that the aim of solving the blocking is fulfilled. The atomizer is applicable to the diversion of atomized melts of the metals or the alloys; and the invention has the advantages that: the atomizer has a simple structure and is convenient to install, the production efficiency can be improved and the like.
Description
Technical field
The present invention relates to manufacture ultra-fine powder technology field with atomizing molten materials with gases, more specifically to a kind of atomizer and the application in metal or alloy ultra-micro powder preparation process thereof.
Background technology
Gas atomization is widely used in the preparation of metal and alloy powder, and the principle of its powder process is the gas shock molten metal with high-speed motion, liquid metals is broken into droplet and at cooled and solidified powdered fast in-flight subsequently.Gas atomization powder has the advantages such as sphericity is high, powder size is controlled, has become the main direction of high-performance metal and special alloy powder preparation.
Atomizer nozzle is the core of gas atomization technology, the mechanism of Jet control air-flow to metal liquid stream, and the surface energy that the kinetic transformation that makes air-flow is new green powder, therefore atomizer has determined performance and the nebulization efficiency of atomized powder.
In prior art, the version of atomizer is varied, be divided into annular distance type atomizer and ring-crack ventilation atomizer according to nozzle arrangements, no matter be ring-crack ventilation or the atomizer of ring pass structure, in use often there is the phenomenon that mozzle stops up, this is at least caused by following two reasons, and the one, molten metal occurs solidifying because temperature reduces in flow process.The 2nd, because backwash appears in molten drop in atomization process, be that the drop of atomization is to the direction flight of aerodynamic atomization nozzle, the molten drop of backwash adheres to the lower end of aerodynamic atomization nozzle, and constantly solidify accumulation, finally cause the mozzle on the centre bore of aerodynamic atomization nozzle stop up and atomization process is interrupted.Once mozzle stops up, production cannot be proceeded.In this case, only have the whole atomizer of replacing, this has increased production cost greatly, and affects preparation efficiency and product quality.
At present, atomizer is improved to the technology of upgrading to be had a lot, Patents also has a lot, but these technology are relevant how to control metal dust granularity and the aspect such as how to enhance productivity mostly, seldom have about the patent and the technology that how to solve atomizer blockage problem.
Patent CN201744413U is disclosed prepares the Anti-blocking atomizer nozzle that micro-fine metal powder is used, in mozzle, increase combination electrode rod, in the time stopping up generation, on combination electrode rod and mozzle, switch on, tamper is heated, make its instantaneous intensification fusing, prevent from stopping up, solving thereby reach the object of stopping up.But following several problem values that this atomizer exists must be discussed, first, mozzle has conductive high temperature resistance performance, the first electrode and the second electrode are high temperature resistant electrode, this requires very high to mozzle and electrode material used, and mozzle often energising can deform and affect atomizing effect, electrode material need to prevent with metal bath react and high temperature resistant; The second, because the general diameter of mozzle is smaller, usually, at the order of magnitude of millimeter, therefore place combination electrode in mozzle inside, the more difficult realization of introducing of extraneous power supply, and in operability, also there is difficulty; The 3rd, mozzle contains this design of combination electrode, obtains the granularity control of particle more difficult for atomization process, and this is while spraying from draft tube outlets due to melt, presents the melt of a hollow, and circumference is larger, more difficult for the particle diameter control of powder; The 4th, any collision between mozzle and combination electrode, all likely causes damage to mozzle, even causes the appearance of short circuit phenomenon.The 5th, this atomizer dismounting difficulty, just in case run into the situation that lead rupture and metal or alloy stop up, whole atomizer can only be pulled down, and come, the metal or alloy fusing of stopping up, to take out electrode by external heat, exchange after electrode, atomizer is fixed, the workload of so each dismounting is very large, has reduced production efficiency again.Therefore, the design of this atomizer structure is implemented more difficult.
In a word, how to solve the blockage problem of atomizer, and don't to affect production efficiency be a difficult problem.Therefore, find a kind of effective solution, can solve atomizer blockage problem, can also ensure simple and practical, for the skilled person or a difficult problem.
Summary of the invention
One of object of the present invention is to provide a kind of atomizer in order to prevent the problem that metal or alloy stops up.
Two of object of the present invention provides above-mentioned a kind of atomizer application process in metal or alloy ultra-micro powder preparation process.
Technical scheme of the present invention
A kind of atomizer of the present invention, by changing the structure of atomizer, is installed heater between mozzle and metal-coating, prevents from stopping up, solving thereby reach the object of stopping up.
Described a kind of atomizer comprises mozzle, nozzle, also comprises in addition metal-coating, heater, ceramic-seal ring etc.;
Described nozzle is provided with air inlet pipe and gas outlet;
The upper end core of described metal-coating has the hole adapting with mozzle external diameter, and in order to mozzle to be installed, the lower end of metal-coating is uncovered, and metal-coating is apered to 80 in the one end at 1/3 ~ 1/2 place near bottom outlet from top to bottom
~ 89
outer cone body;
Be provided with screw thread in the outside of the part that is apered to bullet of metal-coating and match with the screw thread on the side of nozzle Nei center taper hole, to realize support, the location and fixing to metal-coating, metal-coating remainder does not contact with nozzle;
When installation, make mozzle and metal-coating concentric, the bottom of mozzle is concordant with the bottom of metal-coating;
Between mozzle and metal-coating, there is the gap of 10mm ~ 100mm, heater is installed in gap; So that mozzle does not directly contact with metal-coating, can prevent the conduction between heater and metal-coating on the one hand, can greatly reduce on the other hand scattering and disappearing of mozzle heat;
Described heater is provided with external power interface and is connected with extraneous power supply, in case there is metal or low melting point stop up in a kind of atomizer of the present invention use in the situation that, can switch on by heater, to tamper, heating makes its fusing that heats up, and reaches and solves the object that metal or alloy stops up;
In addition, being preferably provided with metallic reflective coating or spraying at metal-coating near the surface of heater and forming one deck white reflectance coating, is the energy for reflecting heater radiation, reduces the energy-conservation effect of energy loss thereby reach;
Described white reflectance coating coating used is preferably tin oxide;
Adopt ceramic-seal ring sealing at the gap location of metal-coating and mozzle bottom, ceramic-seal ring adopts and is threaded with metal-coating bottom;
Described mozzle, metal-coating can, according to atomization metal or alloy powder difference, be selected different materials;
Even that described mozzle can be selected is high temperature resistant, thermal insulation good, inertia, be easy to processing or be difficult to processing but can be made into the material of simple shape, as aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics, silicon carbide ceramics and other refractory ceramics;
Described metal-coating is can selection intensity high, be easy to processing, inexpensive material, as carbon steel or stainless steel.
Described ceramic-seal ring material selection zirconyl phosphate ceramics, aluminum phosphate or microcrystal glass processable ceramic;
Described heater is according to atomization metal or alloy powder difference, optional with electric furnace heating wire, silicon carbon rod heater.
The installation process of above-mentioned a kind of atomizer is as follows:
First the metal-coating on atomizer is threaded connection and is installed on nozzle, the outer cone body of metal-coating is matched with nozzle Nei center taper hole, metal-coating remainder does not contact with nozzle;
Then in metal-coating the inside, heater is installed;
Put into mozzle in heater inner side subsequently, the center of mozzle and the center superposition of metal-coating, finally at metal-coating and exit, mozzle bottom placing ceramic sealing ring, install thereby complete atomizer.
Utilize above-mentioned a kind of atomizer to carry out atomization and prepare metal or alloy ultra-micro powder, after being connected with the pipeline on melt stove by the mozzle of above-mentioned atomizer, can produce, in production process, just in case there is the situation that metal or alloy blocks, heating or replacing mozzle switch on power.
Beneficial effect of the present invention
A kind of atomizer of the present invention, it is the structure by changing atomizer, between mozzle and metal-coating, heater is installed, by heating, can effectively eliminate the low melting point tamper that metal or alloy forms, can also play insulation effect to molten metal, can effectively prevent from the cooled and solidified that produces in flow process that molten metal causes because of reasons such as Changes in weather from thereby avoid mozzle bottom to stop up, the phenomenon that atomization cannot continue being occurred.
In a kind of atomizer of the present invention, most of material adopts metal material, not only cheap, easy to process, reusable, and can prevent that mozzle end from contacting with high speed cold air-flow, and heating status is significantly improved, and thermal shock resistance improves, and is difficult for bursting.Due to the protection of metal-coating, mozzle security performance improves, and difficultly fractures or damages.
Gapped heat insulation between mozzle and metal-coating, metal-coating only contacts with exit, mozzle bottom with a cone section, area of dissipation reduces, mozzle does not directly contact high speed cold air-flow, these measures can significantly keep the temperature of melt, reduce the melt atomization degree of superheat and reduce the danger of stopping up; The use of heater, also provides guarantee for reducing the atomization degree of superheat.The reduction of melt overheat degree, can effectively weaken reacting between melt and mozzle, alleviates composition and pollutes, and improves the quality of powder.
As can be seen here, a kind of atomizer of the present invention, simple in structure, easy to use, cost is low, can be repeatedly used, and anti-clogging, dredge blockage are effective, can will stop up dredging rapidly and do not damage atomizer.Can greatly save the work into dredging or replacing mozzle, enhance productivity, reduce labour intensity.
Brief description of the drawings
Fig. 1, atomizer structure schematic diagram of the present invention, in figure, 1 is mozzle, and 2 is metal-coating, and 3 is nozzle, and 4 is nozzle air inlet pipe, and 5 is nozzle gas outlet, and 6 is ceramic-seal ring, and 7 is the gap between mozzle and metal-coating, and 8 is heater, and 9 is reflectance coating.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is further set forth below by embodiment, but do not limit the present invention.
embodiment 1
A kind of atomizer, as shown in Figure 1, it also comprises gap 7, heater 8, reflectance coating 9, ceramic-seal ring 6 between metal-coating 2, mozzle and metal-coating by mozzle 1, nozzle 3 to its structural representation.
Described nozzle 3 is provided with nozzle air inlet pipe 4, nozzle gas outlet 5;
The upper part of described metal-coating 2 has the hole adapting with mozzle 1 external diameter, and in order to mozzle 1 to be installed, the lower end of metal-coating 2 is uncovered, and metal-coating 2 is apered to 80 in the one end at 1/3 ~ 1/2 place near bottom outlet from top to bottom
~ 89
outer cone body;
Be provided with screw thread in the outside of the part that is apered to bullet of metal-coating 2 and match with the screw thread on the side of nozzle 3 Nei center taper holes, to realize support, the location and fixing to metal-coating 2, metal-coating 2 remainders do not contact with nozzle 3;
Described mozzle 1 adopts aluminium oxide ceramics, makes mozzle 1 concentric with metal-coating 2 when installation, and mozzle 1 is concordant with metal-coating 2 bottoms;
Between mozzle 1 and metal-coating 2, there is the gap 7 of 10mm ~ 100mm, 7 li heater 8 is installed in gap, heater 8 is provided with external power interface and is connected with extraneous power supply, the in the situation that of there is metal or low melting point obstruction in a kind of atomizer use procedure of the present invention, can switch on by heater 8, to tamper, heating makes its fusing that heats up, and reaches and solves the object that metal or alloy stops up;
Surface spraying one deck white reflectance coating 9 at metal-coating 2 near heater 8, in the time that heater 8 is worked, white reflectance coating 9 plays reflex to the heat of heater 8 radiation, prevents the consumption of heat;
Adopt ceramic-seal ring 6 to seal in gap 7 near mozzle 1 bottom, ceramic-seal ring 6 adopts and is threaded with metal-coating 2 bottoms.
application Example 1
The application of a kind of atomizer described in embodiment 1 in the preparation of superfine metal aluminium powder, concrete grammar is as follows:
The assembling of atomizer
First the outer cone body of metal-coating 2 is matched with nozzle 3 Nei center taper holes, the outside of the part that is apered to bullet of metal-coating 2 is provided with screw thread and matches with the screw thread on the side of nozzle Nei center taper hole, realize support, location and fixing to metal-coating 2, metal-coating 2 remainders do not contact with nozzle 3; Then in metal-coating 2 the insides, heater 8 is installed; Put into mozzle 1 in heater 8 inner sides subsequently; Finally load onto ceramic-seal ring 6 at metal-coating 2 and mozzle 1 lower end, thereby complete the installation of atomizer;
Utilize above-mentioned a kind of atomizer to carry out atomization and prepare metallic aluminium powder, after being connected with the pipeline on melt stove by the mozzle 1 of above-mentioned atomizer, can produce, just in case there is the situation that metallic aluminium blocks in mozzle in production process, heating switches on power, there is not the phenomenon that metal stops up in exit, result mozzle bottom, and can produce continuously the whole year, flour extraction and production efficiency are greatly improved.
Can find out from the above results, compared with existing atomizer, the use of a kind of atomizer of the present invention in the preparation of metal or alloy ultra-micro powder not only can solve the obstructing problem of metal or alloy, thereby reduce the loss of material, saved material, reduce production cost, also improved the quality of product, improved production efficiency.
Foregoing is only the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (8)
1. an atomizer, comprises mozzle, nozzle, characterized by further comprising metal-coating, heater, ceramic-seal ring;
The upper end core of described metal-coating has the hole adapting with mozzle external diameter, and in order to mozzle to be installed, the lower end of metal-coating is uncovered, and metal-coating is apered to 80 in the one end at 1/3 ~ 1/2 place near bottom outlet from top to bottom
~ 89
bullet;
Be provided with screw thread in the outside of the part that boils down into bullet of metal-coating and match with the screw thread on the side of nozzle Nei center taper hole, to realize support, the location and fixing to metal-coating, metal-coating remainder does not contact with nozzle;
Mozzle is concentric with metal-coating, and when installation, mozzle bottom is concordant with metal-coating bottom;
Between mozzle and metal-coating, be provided with the gap of 10mm ~ 100mm, heater is installed in gap;
Described heater is provided with external power interface and is connected with extraneous power supply;
Adopt ceramic-seal ring sealing at the gap location of metal-coating and mozzle bottom, ceramic-seal ring adopts and is threaded with metal-coating bottom.
2. a kind of atomizer as claimed in claim 1, is characterized in that being provided with near the inner surface of heater one deck white reflectance coating that metallic reflective coating or spraying form at metal-coating.
3. a kind of atomizer as claimed in claim 2, is characterized in that it is tin oxide that described reflectance coating sprays coating used.
4. a kind of atomizer as claimed in claim 3, is characterized in that described heater is electric furnace heating wire or silicon carbon rod.
5. a kind of atomizer as claimed in claim 4, is characterized in that described ceramic-seal ring material selection zirconyl phosphate ceramics.
6. a kind of atomizer as claimed in claim 5, is characterized in that described metal-coating adopts carbon steel or stainless steel.
7. a kind of atomizer as described in claim as arbitrary in claim 1 ~ 6, is characterized in that described mozzle material selection aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, zirconia ceramics or silicon carbide ceramics.
8. a kind of atomizer as described in claim as arbitrary in claim 1 ~ 6 is in the application of preparing in metal or alloy ultra-micro powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452080.0A CN102489712B (en) | 2011-12-30 | 2011-12-30 | Atomizer and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452080.0A CN102489712B (en) | 2011-12-30 | 2011-12-30 | Atomizer and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102489712A CN102489712A (en) | 2012-06-13 |
| CN102489712B true CN102489712B (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110452080.0A Expired - Fee Related CN102489712B (en) | 2011-12-30 | 2011-12-30 | Atomizer and application thereof |
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| Country | Link |
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| CN (1) | CN102489712B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769588A (en) * | 2014-01-24 | 2014-05-07 | 江苏理工学院 | 3D (three-dimensional) printing metal melt conveying device |
| CN103737001B (en) * | 2014-01-24 | 2016-05-18 | 江苏理工学院 | Metal 3D prints atomising device |
| CN109806988B (en) * | 2019-04-13 | 2023-10-03 | 江苏华威机械制造有限公司 | Molten metal jet deposition atomizer capable of preventing nodulation and nozzle blockage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2603210A1 (en) * | 1986-08-28 | 1988-03-04 | Serole Bernard | Jet for liquid metal spray - includes electrodes delivering high current via arc to provide additional heating of atomised metal |
| CN2587553Y (en) * | 2002-12-30 | 2003-11-26 | 北京有色金属研究总院 | Apparatus for reducing heat loss in metal atomization guiding system |
| CN201255566Y (en) * | 2008-07-31 | 2009-06-10 | 上海沃迪科技有限公司 | Spray drying machine |
| CN101879600A (en) * | 2010-07-06 | 2010-11-10 | 河南省远洋铝业有限公司 | Anti-blocking atomizer nozzle for preparing micro-fine metal powder and anti-blocking method thereof |
| CN202411422U (en) * | 2011-12-30 | 2012-09-05 | 上海应用技术学院 | Atomizer |
-
2011
- 2011-12-30 CN CN201110452080.0A patent/CN102489712B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2603210A1 (en) * | 1986-08-28 | 1988-03-04 | Serole Bernard | Jet for liquid metal spray - includes electrodes delivering high current via arc to provide additional heating of atomised metal |
| CN2587553Y (en) * | 2002-12-30 | 2003-11-26 | 北京有色金属研究总院 | Apparatus for reducing heat loss in metal atomization guiding system |
| CN201255566Y (en) * | 2008-07-31 | 2009-06-10 | 上海沃迪科技有限公司 | Spray drying machine |
| CN101879600A (en) * | 2010-07-06 | 2010-11-10 | 河南省远洋铝业有限公司 | Anti-blocking atomizer nozzle for preparing micro-fine metal powder and anti-blocking method thereof |
| CN202411422U (en) * | 2011-12-30 | 2012-09-05 | 上海应用技术学院 | Atomizer |
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| Publication number | Publication date |
|---|---|
| CN102489712A (en) | 2012-06-13 |
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Granted publication date: 20140820 Termination date: 20161230 |