CN107570720A - A kind of quantitative centrifugal atomization prepares the method and device of uniform grading metal dust - Google Patents
A kind of quantitative centrifugal atomization prepares the method and device of uniform grading metal dust Download PDFInfo
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- CN107570720A CN107570720A CN201710561191.2A CN201710561191A CN107570720A CN 107570720 A CN107570720 A CN 107570720A CN 201710561191 A CN201710561191 A CN 201710561191A CN 107570720 A CN107570720 A CN 107570720A
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Abstract
The present invention discloses the method and device that a kind of quantitative centrifugal atomization prepares uniform grading metal dust.The present invention utilizes motor driven crucible rotation with holes, so that molten metal liquid is sprayed by the aperture on crucible under the influence of centrifugal force in crucible, molten metal is after aperture is sprayed, molten drop is atomized into because of the effect of centrifugal force, spherical metal drop is formed in the presence of gravity and surface tension, and the prill of uniform particle sizes is formed in dropping process.By matching different crucible hole diameters and crucible rotation speed, different types of metal dust, and size tunable can be prepared.Metal dust prepared by this method has the characteristics of high size tunable, sphericity, epigranular.
Description
Technical field
The invention belongs to technical field prepared by spherical metal powder, more particularly to a kind of quantitative centrifugal atomization prepares equal
The method and device of even particle diameter metal dust.
Background technology
With the development of material science, the status that globular metallic powder occupies in material processing has increasingly been improved.At present,
Globular metallic powder be widely used to solar cell, semiconductor integrated circuit, Electronic Packaging, precision manufactureing, chemical catalysis,
The fields such as raw body material.And size, sphericity and the particle size uniformity of spherical powder then become the pass for influenceing product quality
Key factor.
At present, the method for preparing globular metallic powder both at home and abroad mainly has remelting process, uniform droplet spray and atomization.
Wherein remelting process is that raw metal is made after filament to cut into uniform segment, and the deep fat for being then immersed in proper temperature is allowed to molten
Change, be frozen into spheroidal particle, this method principle is simple, but high and poor for small particle or plasticity to manufacture schedule requirement
Material processing difficulties, and production efficiency is low；Uniform droplet spray is to melt raw metal, will by vibration-extrusion
Liquid metal is extruded from crucible bottom with holes and forms liquid bead, so as to be frozen into globular metallic powder, prepared by this method
Spherical powder size uniform, quality is good, but preparation process must be by the way of vibration-extrusion, can be to the liquid material in crucible
Stability causes necessarily to influence, and is reduced in particular with liquid material, and its stability can worse and worse, and this method prepares effect
Rate is low, is not suitable for industrialized mass production；Atomization is broadly divided into gas atomization, water atomization and centrifugal atomization, because of such
The production efficiency of method is high, turns into globular metallic powder production method the most frequently used at present, wherein gas atomization and water atomization
All it is that liquid metal is formed using high-speed Medium to impact, metal dust is prepared so as to crush flow of liquid metal, and centrifugal atomizing
Rule is to flow into liquid metal at a high speed on the disk of rotation, and metal is prepared so as to crush liquid metal using the effect of centrifugal force
Powder, be the defects of such method maximum, liquid metal can not be implemented it is quantitative broken, so as to cause prepared spherical gold
Category powder diameter is uncontrollable, it is necessary to screened the powder that can obtain appropriate particle size layer by layer, and easily produces and largely defend
Star drips, and has a strong impact on the performance of globular metallic powder.
In summary, still lacking both at home and abroad at present can continuous and stable production size be controllable, sphericity is high, size distribution is equal
Even globular metallic powder method.
The content of the invention
For the deficiency of above-mentioned powder preparation method, the present invention is proposed using centrifugal action, is quantitatively sprayed metal and is melted
Liquid, form spherical metal drop and be cooled into metal dust, metal dust prepared by this method has size tunable, sphericity
The characteristics of height, epigranular.
The technical scheme is that：Utilize motor（18）Drive crucible with holes（13）Rotation so that melted in crucible
Molten metal（14）Under the influence of centrifugal force by the aperture on crucible（4）Spray, molten metal is after aperture is sprayed, because of centrifugal force
Act on and be atomized into molten drop（5）, spherical metal drop is formed in the presence of gravity and surface tension, and in dropping process
The middle prill for forming uniform particle sizes, eventually enters into powder catcher（20）, it is concretely comprised the following steps：
Open vent valve（9）, wait after deflating, open door（19）, it is put into powder catcher（20）Behind crucible underface
Close door（20）, open door（1）, raw metal to be melted is put into crucible, the raw metal amount of being put into is no more than crucible
Volume 2/3, covers crucible cover（3）And it is fixed, close door（1）, close vent valve（9）, open mechanical pump（10）By storehouse internal pressure
Power is evacuated to 1Pa, then uses diffusion pump（11）Pressure in storehouse is further evacuated to 0.01Pa, passes through admission line（2）It is filled with into storehouse
High purity inert gas so that storehouse internal and external pressure balance, close admission line（2）, being powered makes sensing heater（6）Begin to warm up molten
Change the raw metal in crucible, and keep molten metal temperature to be higher than 30 ~ 50 DEG C of the fusing point of raw metal, open motor（18）Open
Begin rotation crucible so that the molten metal in crucible under the influence of centrifugal force, by the aperture on crucible（4）Outwards spray, gold
After belonging to liquid ejection crucible outer wall, under gravitational and centrifugal forces, dispersed molten drop is formed（5）And fall, gold
Belong to drop and fall into powder catcher because surface tension forms spherical droplets and is cooled to prill during whereabouts（20）,
After prepared by powder, stop crucible rotation, disconnect load coil power supply, open vent valve, wait after deflating, open
Door, powder catcher is taken out, close door, close vent valve, then be evacuated to pressure in storehouse by mechanical pump and diffusion pump
0.01Pa, keep the high vacuum state in storehouse.
The key technology of the present invention is：According to prepared metal dust species and particle diameter, it is necessary to match different earthenwares
Crucible hole diameter and crucible rotation speed.Its reason is：1）The density of variety classes liquid metal, therefore in identical crucible
Under rotary speed, the centrifugal force that different liquid metals are obtained is of different sizes； 2）Crucible hole diameter and liquid metal viscosity are determined
Determine to spray the direct cohesive force size of liquid metal in the liquid metal and aperture outside crucible aperture.And in the core of the present invention
Appearance be exactly to utilize centrifugal action so that ejection crucible aperture outside liquid metal it is quantitative shake off cohesive force, form spherical gold
Belong to drop, and then the globular metallic powder of uniform particle sizes is formed after cooling down.
Beneficial effect of the present invention is：By adjusting aperture and the rotary speed of crucible, it is small that control ejection crucible can be quantified
The size of the liquid metal droplet in hole, so as to control prepared powder diameter, and powder preparation efficiency is high.
Brief description of the drawings：
Accompanying drawing 1 prepares the schematic diagram of uniform grading globular metallic powder device for a kind of quantitative centrifugal atomization, in figure（1）To be upper
Door,（2）For admission line,（3）For crucible cover.（4）For aperture,（5）For molten drop,（6）For sensing heater,（7）For
Rotary shaft,（8）For motor support bar,（9）For vent valve,（10）For mechanical pump,（11）For diffusion pump,（12）For pressure gauge,
（13）For crucible,（14）For molten metal,（15）For viewer,（16）For observation panel,（17）For thermocouple,（18）For motor,
（19）For lower door,（20）For powder catcher.
Accompanying drawing 2 is crucible front view.
Embodiment：
Technical solution of the present invention and device are described further with reference to specific embodiment：
Embodiment one：The spherical powder of metallic aluminium is prepared, powder diameter is 100 μm, and crucible hole diameter is 80 μm, crucible rotation
Speed is 3000 revs/min, is concretely comprised the following steps：
Open vent valve（9）, wait after deflating, open door（19）, it is put into powder catcher（20）Behind crucible underface
Close door（19）, open door（1）, metallic aluminium is put into crucible, the amount of being put into of metallic aluminium is no more than crucible volume 2/3,
Cover crucible cover（3）And it is fixed, close door（1）, close vent valve（9）, open mechanical pump（10）Pressure in storehouse is evacuated to
1Pa, then use diffusion pump（11）Pressure in storehouse is further evacuated to 0.01Pa, passes through admission line（2）It is filled with into storehouse high-purity lazy
Property gas so that storehouse internal and external pressure balance, close admission line（2）, being powered makes sensing heater（6）Begin to warm up fusion crucible
Interior metallic aluminium, and keep aluminum melt in crucible temperature be 690 ~ 710 DEG C, open motor（18）Start to rotate crucible, control
Crucible rotation speed be 3000 revs/min so that the aluminum melt in crucible under the influence of centrifugal force, by the aperture on crucible
（4）Outwards spray, after aluminum melt sprays crucible outer wall, under gravitational and centrifugal forces, form dispersed aluminium liquid drop
（5）And fall, aluminium liquid is dropped in during whereabouts because surface tension forms spherical droplets and is cooled to aluminum metal bead and falls into powder
Last collector（20）, after prepared by powder, stop crucible rotation, disconnect load coil power supply, open vent valve, wait to put
After gas, door is opened, takes out powder catcher, closes door, closes vent valve, then by mechanical pump and diffusion pump by storehouse
Interior pressure is evacuated to 0.01Pa, keeps the high vacuum state in storehouse.
Embodiment two：High temperature alloy Inconel 718 spherical powder is prepared, powder diameter is 50 μm, and crucible aperture is straight
Footpath is 60 μm, and crucible rotation speed is 1800 revs/min, is concretely comprised the following steps：
Open vent valve（9）, wait after deflating, open door（19）, it is put into powder catcher（20）Behind crucible underface
Close door（19）, open door（1）, high temperature alloy Inconel 718 is put into crucible, the amount of being put into is no more than crucible volume
2/3, cover crucible cover（3）And it is fixed, close door（1）, close vent valve（9）, open mechanical pump（10）Pressure in storehouse is taken out
To 1Pa, then use diffusion pump（11）Pressure in storehouse is further evacuated to 0.01Pa, passes through admission line（2）It is filled with into storehouse high-purity
Inert gas so that storehouse internal and external pressure balance, close admission line（2）, being powered makes sensing heater（6）Begin to warm up fusing earthenware
High temperature alloy Inconel 718 in crucible, and keep aluminum melt in crucible temperature be 1350 ~ 1370 DEG C, open motor（18）
Start to rotate crucible, it is 1800 revs/min to control crucible rotation speed so that the high temperature alloy liquation in crucible is in centrifugal force
Under effect, by the aperture on crucible（4）Outwards spray, after liquation sprays crucible outer wall, under gravitational and centrifugal forces, shape
Into dispersed drop（5）And fall, drop is during whereabouts because surface tension forms spherical droplets and is cooled to height
The prills of temperature alloy Inconel 718 fall into powder catcher（20）, after prepared by powder, stop crucible rotation, disconnect
Load coil power supply, vent valve is opened, is waited after deflating, open door, take out powder catcher, close door, closed
Vent valve is closed, then pressure in storehouse is evacuated to by 0.01Pa by mechanical pump and diffusion pump, keeps the high vacuum state in storehouse.
Claims (3)
1. a kind of method that quantitative centrifugal atomization prepares uniform grading metal dust, it is characterised in that：Utilize motor（18）Band
Move crucible with holes（13）Rotation so that molten metal liquid in crucible（14）Under the influence of centrifugal force by small on crucible side
Hole（4）Spray, molten metal shakes off crucible aperture because of the effect of centrifugal force and be atomized into molten drop after aperture is sprayed（5）,
Spherical metal drop is formed in the presence of gravity and surface tension, and the prill of uniform particle sizes is formed in dropping process,
Eventually enter into powder catcher（20）, it is concretely comprised the following steps：
Open vent valve（9）, wait after deflating, open lower door（19）, it is put into powder catcher（20）Immediately below crucible
After close door（19）, door in opening（1）, raw metal to be melted is put into crucible, the raw metal amount of being put into is no more than
Crucible volume 2/3, covers crucible cover（3）And it is fixed, close door（1）, close vent valve（9）, open mechanical pump（10）By storehouse
Interior pressure is evacuated to 1Pa, then uses diffusion pump（11）Pressure in storehouse is further evacuated to 0.01Pa, passes through admission line（2）Into storehouse
It is filled with high purity inert gas so that storehouse internal and external pressure balance, close admission line（2）, being powered makes sensing heater（6）Start to add
Raw metal in heat fusing crucible, and keep molten metal temperature to be higher than 30 ~ 50 DEG C of the fusing point of raw metal, open motor
（18）Start to rotate crucible so that the molten metal in crucible（14）Under the influence of centrifugal force, by the aperture on crucible（4）To
Outer ejection, after molten metal sprays crucible outer wall, under gravitational and centrifugal forces, form dispersed molten drop（5）
And fall, molten drop falls into powder because surface tension forms spherical droplets and is cooled to prill during whereabouts and received
Storage（20）, after prepared by powder, stop crucible rotation, disconnect load coil power supply, open vent valve, wait to have deflated
Bi Hou, door is opened, take out powder catcher, close door, close vent valve, then by mechanical pump and diffusion pump by storehouse internal pressure
Power is evacuated to 0.01Pa, keeps the high vacuum state in storehouse.
2. a kind of quantitative centrifugal atomization prepares the device of uniform grading metal dust, it is characterised in that：Device is by housing（21）、
Motor（18）, crucible（13）, crucible cover（3）, sensing heater（6）, thermocouple（7）, powder catcher（20）And viewer
（15）Composition, is wherein provided with mechanical pump on housing（10）, diffusion pump（11）, pressure gauge（12）, vent valve（9）, observation panel
（16）And admission line（2）, and it is provided with door in case top and side-lower（1）With lower door（19）, enclosure interior is equipped with
Support bar（8）, motor is fixed on support bar, and crucible is located at directly over motor, and by axle（7）It is connected with motor, crucible side
It is provided with circular micropore（4）, sensing heater（6）With temperature thermocouple（17）On the outside of crucible bottom, collector（20）It is located at
The underface of motor and crucible.
3. a kind of quantitative centrifugal atomization prepares the device of uniform grading metal dust, its feature as claimed in claim 2
It is：By matching different crucible hole diameters and crucible rotation speed, the metal dust of variety classes and particle diameter can be prepared.
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| CN201710561191.2A CN107570720A (en) | 2017-07-11 | 2017-07-11 | A kind of quantitative centrifugal atomization prepares the method and device of uniform grading metal dust |
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| CN201710561191.2A CN107570720A (en) | 2017-07-11 | 2017-07-11 | A kind of quantitative centrifugal atomization prepares the method and device of uniform grading metal dust |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941593A (en) * | 2018-07-09 | 2018-12-07 | 华中科技大学 | A kind of device and method preparing metal powder using electromagnetic force |
| CN108971506A (en) * | 2018-07-02 | 2018-12-11 | 王尚木 | A kind of device and method of the mass low cost production small ball of noble metal |
| CN109290585A (en) * | 2018-11-07 | 2019-02-01 | 深圳市圆梦精密技术研究院 | Prepare the device and preparation method thereof of spherical powder |
| CN109622981A (en) * | 2018-11-29 | 2019-04-16 | 北京康普锡威科技有限公司 | A kind of device and method efficiently preparing metal powder |
| CN110961640A (en) * | 2019-12-27 | 2020-04-07 | 深圳微纳增材技术有限公司 | Device and method for preparing metal powder for 3D printing |
| CN111940749A (en) * | 2020-07-08 | 2020-11-17 | 沙洋富栩新材料技术有限公司 | Metal powder material preparation device and method |
| CN112584950A (en) * | 2018-07-03 | 2021-03-30 | 格勒诺布尔综合理工学院 | Granulation method and apparatus |
| CN112589107A (en) * | 2020-11-23 | 2021-04-02 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Raw material crushing device for alloy type 3D printer |
| CN115555573A (en) * | 2022-09-29 | 2023-01-03 | 西华大学 | Method for crushing low-melting-point active metal |
| CN117548679A (en) * | 2024-01-09 | 2024-02-13 | 湖南艾缇欧新材料有限公司 | Tin powder preparation equipment and operation method |
| CN118513559A (en) * | 2024-05-27 | 2024-08-20 | 泸溪县群祥新材料有限责任公司 | Optimized metal powder preparation device and preparation method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971506A (en) * | 2018-07-02 | 2018-12-11 | 王尚木 | A kind of device and method of the mass low cost production small ball of noble metal |
| CN112584950B (en) * | 2018-07-03 | 2023-10-10 | 格勒诺布尔综合理工学院 | Granulation method and apparatus |
| CN112584950A (en) * | 2018-07-03 | 2021-03-30 | 格勒诺布尔综合理工学院 | Granulation method and apparatus |
| CN108941593A (en) * | 2018-07-09 | 2018-12-07 | 华中科技大学 | A kind of device and method preparing metal powder using electromagnetic force |
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| CN109622981A (en) * | 2018-11-29 | 2019-04-16 | 北京康普锡威科技有限公司 | A kind of device and method efficiently preparing metal powder |
| CN110961640A (en) * | 2019-12-27 | 2020-04-07 | 深圳微纳增材技术有限公司 | Device and method for preparing metal powder for 3D printing |
| CN110961640B (en) * | 2019-12-27 | 2023-12-01 | 深圳微纳增材技术有限公司 | Device and method for preparing metal powder for 3D printing |
| CN111940749A (en) * | 2020-07-08 | 2020-11-17 | 沙洋富栩新材料技术有限公司 | Metal powder material preparation device and method |
| CN112589107A (en) * | 2020-11-23 | 2021-04-02 | 安徽省春谷3D打印智能装备产业技术研究院有限公司 | Raw material crushing device for alloy type 3D printer |
| CN115555573A (en) * | 2022-09-29 | 2023-01-03 | 西华大学 | Method for crushing low-melting-point active metal |
| CN115555573B (en) * | 2022-09-29 | 2023-11-21 | 西华大学 | Method for crushing low-melting-point active metal |
| CN117548679A (en) * | 2024-01-09 | 2024-02-13 | 湖南艾缇欧新材料有限公司 | Tin powder preparation equipment and operation method |
| CN117548679B (en) * | 2024-01-09 | 2024-03-22 | 湖南艾缇欧新材料有限公司 | Tin powder preparation equipment and operation method |
| CN118513559A (en) * | 2024-05-27 | 2024-08-20 | 泸溪县群祥新材料有限责任公司 | Optimized metal powder preparation device and preparation method thereof |
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