CN107812953A - A kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant - Google Patents
A kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant Download PDFInfo
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- CN107812953A CN107812953A CN201710963195.3A CN201710963195A CN107812953A CN 107812953 A CN107812953 A CN 107812953A CN 201710963195 A CN201710963195 A CN 201710963195A CN 107812953 A CN107812953 A CN 107812953A
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- whirlwind
- powder case
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- powder
- case processed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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Abstract
The invention discloses a kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant, including powder case processed, super high speed motor, centrifugal turntable, barrel, high-speed electric expreess locomotive, whirlwind rotating disk, spray boom, screen box, vibrating motor and stirring roller, the base is provided with powder case processed, it is described, super high speed motor output shaft is connected with main shaft by shaft coupling, and main shaft lower end is fixedly connected with centrifugal turntable；High-speed electric expreess locomotive is installed with outer wall at left and right sides of the powder case processed, whirlwind rotating disk is also rotatablely equipped with inside the powder case processed, the other end of the whirlwind rotating disk is also associated with being pressurized airduct.By the effect of centrifugal force so that metal liquid uniformly flows out before powder processed, so as to which the in the same size of metallic particles after powder processed be effectively ensured, pass through the collective effect of whirlwind rotating disk and supercharging airduct in pulverizing process simultaneously, the intensity of shearing wind-force is further improved, so that the metallic particles degree after shearing is smaller.
Description
Technical field
The present invention relates to metal pink collar domain, specifically a kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant.
Background technology
Powder by atomization is generally divided into water atomization pulverization and gas-atomized powder, and water atomization pulverization constantly first uses electric furnace or induction furnace
It is the qualified alloy liquid of composition (typically overheating 100~150 DEG C) by raw metal melting, is then injected into positioned at atomization spray
In tundish on mouth, aluminium alloy is flowed out by tundish bottom leakage eye, met when passing through nozzle with high velocity air or current by
It is atomized and is rapidly solidificated into alloy powder in the atomizing cup of closing for fine drop, atomized drop.But water atomized powder particle is more
For irregular shape, oxygen content is high (being higher than 600 × 10), must annealed processing.Conventional gas-atomized powder particle after powder processed
It is not of uniform size, and the circularity of particle is not high.
The content of the invention
It is an object of the invention to provide a kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the present invention provides following technical scheme：
A kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant, including powder case processed, super high speed motor, centrifugal turntable, barrel, high speed
Motor, whirlwind rotating disk, spray boom, screen box, vibrating motor and stirring roller, the base are provided with powder case processed, base and powder case processed
Between be fixedly connected by screw, the powder case upper center position processed is installed with super high speed motor, super high speed motor
Output shaft is downward and stretches into inside powder case processed, and super high speed motor output shaft is connected with main shaft by shaft coupling, and main shaft lower end is fixed
It is connected with centrifugal turntable, material-holding chamber is used to hold the metal liquid after fusing, is additionally provided with barrel inside the powder case processed, in barrel
Portion is fixedly connected between hollow-core construction and barrel and powder chamber interior wall processed by screw, and barrel is also by resistant to elevated temperatures metal material system
Into the centrifugal turntable is located at the inside of barrel and coordinated between centrifugal turntable and barrel for gap, molten metal after fusing
Body is entered inside powder case processed by charging aperture, is then electrified to make super high speed motor start working, and super high speed motor drives centrifugation to turn
Disk starts high-speed rotation, when liquid metals is dropped into inside the material-holding chamber in centrifugal turntable, because centrifugal turntable rotates at a high speed,
In the presence of centrifugal force, metal liquid is uniformly distributed on the inwall of barrel, then between centrifugal turntable and material tube inner wall
Gap in flow out.
High-speed electric expreess locomotive is installed with outer wall at left and right sides of the powder case processed, is also rotatablely installed inside the powder case processed
There is whirlwind rotating disk, connected between whirlwind rotating disk and high-speed electric expreess locomotive by airduct, the other end of the whirlwind rotating disk is also associated with increasing
Pressure ventilation pipe, the both ends diameter of bore for being pressurized airduct are less than center section diameter of bore, described so as to play a part of strengthening wind-force
The supercharging airduct other end is connected with spray boom, when being flowed out in gap of the liquid metals between centrifugal turntable and material tube inner wall, together
Shi Tong electricity makes high-speed electric expreess locomotive start working, and high-speed electric expreess locomotive is drawn air into inside whirlwind rotating disk, so as to drive whirlwind rotating disk to open
Beginning to rotate, whirlwind rotating disk, so as to which air is converted into whirlwind shape, then passes through the pressurization of supercharging airduct in rotation process,
So as to further improve the pressure of whirlwind, and air is sprayed by the air-out pore on spray boom, because now air is high speed
Motion, so as to carry out lateral shear to liquid metals powder, liquid metals homogeneous shear into graininess and is passed through into the cold of air
But it is solidified into round granular.
Screen box is additionally provided with inside the powder case processed, screen box both sides are provided with connecting rod, lead between connecting rod and screen box
Cross and be welded to connect, the powder case both sides outer wall processed is also welded with fixed plate, passes through spring between fixed plate and the connecting rod of lower section
Connection, the screen box bottom are provided with screen cloth, are additionally provided with vibrating motor below the screen cloth, circular granular when cured is fallen into
When on to screen cloth, energization makes vibrating motor start working, under the vibration of vibrating motor, so that screen box up-down vibration, from
And greatly improve breakneck acceleration of the metallic particles on screen cloth.
Also it is installed with motor in the powder case outer right wall processed, the output shaft level of motor to the left and is stretched
Enter inside powder case processed, be rotatablely connected between the casing of the output shaft of motor and powder case processed by bearing, motor it is defeated
Shaft is fixedly connected with rotating shaft inside powder case processed by shaft coupling, and interference fit is provided with stirring roller, the powder processed in rotating shaft
Bottom portion, which is additionally provided with, draws flitch, and the height for drawing flitch is gradually successively decreased from centre to both sides, and the left and right sides of the powder case processed is also opened
There is powder case discharging opening processed.
As the further scheme of the present invention：It is symmetrical on the upside of the powder case processed to be provided with two groups of charging apertures, on charging aperture
Feed pipe is installed, feed pipe is made up of resistant to elevated temperatures alloy material, and feed pipe is stretched into inside powder case processed.
As further scheme of the invention：Material-holding chamber is provided with inside the centrifugal turntable, material-holding chamber is semiellipse shape.
As further scheme of the invention：Wind chamber is provided with inside the spray boom, the spray boom side is also provided with some
Group air-out pore, a diameter of 1-1.5mm of air-out pore.
As further scheme of the invention：Air outlet, air outlet and outside are also provided with left and right sides of the powder case processed
Induced-draught fan be connected.
As further scheme of the invention：Some groups of round sieves are evenly distributed with the screen cloth.
As further scheme of the invention：The stirring roller it is cylindrical on be evenly distributed with some groups of claws.
Compared with prior art, the beneficial effects of the invention are as follows：Structure of the present invention is novel, passes through centrifugal force before powder processed
Effect is so that metal liquid uniformly flows out, so as to which the in the same size of metallic particles after powder processed be effectively ensured, while in powder mistake processed
By the collective effect of whirlwind rotating disk and supercharging airduct in journey, the intensity for shearing wind-force is further improved, so that after shearing
Metallic particles degree is smaller, while adds screening function in a device, effectively avoids the larger metallic particles of particle and remaining metal
Particle batch mixing, while radiating is stirred to the metallic particles after screening using stirring roller after screening, avoid metallic particles temperature
Spend height and cause particle deformation, further improve the circularity of particle, it is easy and effective.
Brief description of the drawings
Fig. 1 is a kind of structural representation of liquid metals whirlwind aerosolization formula fuel pulverizing plant.
Fig. 2 is a kind of structural representation of centrifugal turntable in liquid metals whirlwind aerosolization formula fuel pulverizing plant.
Fig. 3 is a kind of structural representation of whirlwind rotating disk in liquid metals whirlwind aerosolization formula fuel pulverizing plant.
Fig. 4 is a kind of structural representation of spray boom section view in liquid metals whirlwind aerosolization formula fuel pulverizing plant.
In figure：1- bases, 2- powder case, 3- charging apertures, 4- super high speed motors, 5- main shafts, 6- centrifugal turntables, 7- hold material
Chamber, 8- barrels, 9- high-speed fans, 10- whirlwind rotating disk, 11- superchargings airduct, 12- spray booms, 13- wind chamber, 14- air-out pore, 15-
Air outlet, 16- screen boxes, 17- screen clothes, 18- connecting rods, 19- fixed plates, 20- springs, 21- vibrating motors, 22- motors,
23- rotating shafts, 24- stirring rollers, 25- draw flitch, 26- discharging openings.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Refer to Fig. 1-4, a kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant, including powder case 2 processed, super high speed motor 4,
Centrifugal turntable 6, barrel 8, high-speed electric expreess locomotive 9, whirlwind rotating disk 10, spray boom 12, screen box 16, vibrating motor 21 and stirring roller 24, institute
State base 1 and be provided with powder case 2 processed, be fixedly connected between base 1 and powder case 2 processed by screw, the upside left and right of powder case 2 processed is right
Title is provided with two groups of charging apertures 3, feed pipe is provided with charging aperture 3, feed pipe is made up of resistant to elevated temperatures alloy material, and feed pipe is stretched
Enter inside powder case 2 processed, the upper center position of powder case 2 processed is installed with super high speed motor 4, the output of super high speed motor 4
Under axially and stretch into inside powder case 2 processed, the output shaft of super high speed motor 4 is connected with main shaft 5 by shaft coupling, and the lower end of main shaft 5 is fixed
Centrifugal turntable 6 is connected with, the inside of centrifugal turntable 6 is provided with material-holding chamber 7, and material-holding chamber 7 is semiellipse shape, and material-holding chamber 7 is molten for holding
Metal liquid after change, barrel 8 is additionally provided with inside the powder case 2 processed, and the inside of barrel 8 is hollow-core construction and barrel 8 and powder case 2 processed
It is fixedly connected between inwall by screw, barrel 8 is also made up of resistant to elevated temperatures metal material, and the centrifugal turntable 6 is located at barrel 8
Inside and coordinate between centrifugal turntable 6 and barrel 8 for gap, metal liquid after fusing enters powder processed by charging aperture 3
Inside case 2, it is then electrified to make super high speed motor 4 start working, super high speed motor 4 drives centrifugal turntable 6 to start high-speed rotation, when
Liquid metals is dropped into inside the material-holding chamber 7 in centrifugal turntable 6, because centrifugal turntable 6 rotates at a high speed, in the effect of centrifugal force
Under, metal liquid is uniformly distributed on the inwall of barrel 8, is then flowed in the gap between centrifugal turntable 6 and the inwall of barrel 8
Go out.
High-speed electric expreess locomotive 9 is installed with the left and right sides outer wall of powder case processed 2, is also rotated inside the powder case 2 processed
Whirlwind rotating disk 10 is installed, connected between whirlwind rotating disk 10 and high-speed electric expreess locomotive 9 by airduct, the other end of the whirlwind rotating disk 10
It is also associated with being pressurized airduct 11, the both ends diameter of bore of supercharging airduct 11 is less than center section diameter of bore, so as to play enhancing
The effect of wind-force, the supercharging other end of airduct 11 are connected with spray boom 12, and the inside of spray boom 12 is provided with wind chamber 13, the spray boom 12 1
Side is also provided with some groups of air-out pores 14, a diameter of 1-1.5mm of air-out pore 14, when liquid metals from centrifugal turntable 6 with expecting
When being flowed out in the gap between 8 inwalls of cylinder, while being powered makes high-speed electric expreess locomotive 9 start working, and high-speed electric expreess locomotive 9 draws air into rotation
Inside wind rotating disk 10, so as to drive whirlwind rotating disk 10 to start to rotate, whirlwind rotating disk 10 is in rotation process so that air be changed
Into whirlwind shape, then by the pressurization of supercharging airduct 11, so as to further improve the pressure of whirlwind, and by spray boom 12
Air-out pore 14 air is sprayed, because now air is high-speed motion, so as to liquid metals powder carry out lateral shear,
By liquid metals homogeneous shear into graininess and by the cooling and solidifying of air into round granular.
The left and right sides of powder case processed 2 is also provided with air outlet 15, and air outlet 15 is connected with the induced-draught fan of outside, so as to make
Air inside powder case 2 is extracted, and screen box 16 is additionally provided with inside the powder case 2 processed, and the both sides of screen box 16 are provided with connecting rod 18, even
By being welded to connect between extension bar 18 and screen box 16, the both sides outer wall of powder case 2 processed is also welded with fixed plate 19, fixed plate 19
It is connected between the connecting rod 18 of lower section by spring 20, the bottom of screen box 16 is provided with screen cloth 17, uniformly divides on screen cloth 17
Some groups of round sieves are furnished with, the lower section of screen cloth 17 is additionally provided with vibrating motor 21.
Also be installed with motor 22 in the outer right wall of powder case 2 processed, the output shaft level of motor 22 to
A left side is simultaneously stretched into inside powder case 2 processed, is rotatablely connected between the casing of the output shaft of motor 22 and powder case 2 processed by bearing, is driven
The output shaft of dynamic motor 22 is fixedly connected with rotating shaft 23 inside powder case 2 processed by shaft coupling, and installation is interference fitted in rotating shaft 23
Have a stirring roller 24, stirring roller 24 it is cylindrical on be evenly distributed with some groups of claws, metallic particles after screening is entered so as to convenient
Row stirring radiating, avoids metallic particles temperature is too high from causing particle deformation, further improves the circularity of particle, the powder case 2 processed
Bottom, which is additionally provided with, draws flitch 25, and the height for drawing flitch 25 is gradually successively decreased from centre to both sides, and the left and right sides of the powder case 2 processed is also
It is provided with powder case discharging opening 26 processed.
The present invention operation principle be：In use, metal liquid after fusing is entered in powder case 2 processed by charging aperture 3
Portion, it is then electrified to make super high speed motor 4 start working, super high speed motor 4 drives centrifugal turntable 6 to start high-speed rotation, works as liquid
Metal is dropped into inside the material-holding chamber 7 in centrifugal turntable 6, because centrifugal turntable 6 rotates at a high speed, under the influence of centrifugal force, gold
Category liquid is uniformly distributed on the inwall of barrel 8, is then flowed out in the gap between centrifugal turntable 6 and the inwall of barrel 8；When
When liquid metals flows out in the gap between centrifugal turntable 6 and the inwall of barrel 8, while being powered makes high-speed electric expreess locomotive 9 start working,
High-speed electric expreess locomotive 9 is drawn air into inside whirlwind rotating disk 10, and so as to drive whirlwind rotating disk 10 to start to rotate, whirlwind rotating disk 10 is turning
So as to which air is converted into whirlwind shape during dynamic, then by the pressurization of supercharging airduct 11, so as to further improve rotation
The pressure of wind, and sprayed air by the air-out pore 14 on spray boom 12, because now air is high-speed motion, so as to liquid
Body metal dust carries out lateral shear, by liquid metals homogeneous shear into graininess and by the cooling and solidifying of air into circular
It is granular；When circular granular when cured is dropped on screen cloth 17, energization makes vibrating motor 21 start working, in vibrating motor 21
Vibration under so that the up-down vibration of screen box 16, so as to greatly improve breakneck acceleration of the metallic particles on screen cloth 17, simultaneously
Energization makes motor 22 start working, and motor 22 moves stirring roller 24 and starts to rotate, so as to the metallic particles after screening
Agitation radiating is carried out, avoids metallic particles temperature is too high from causing particle deformation, further the circularity of raising particle, after the completion of powder processed
Discharging opening 26 is opened to take out metallic particles.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge
Make a variety of changes.
Claims (7)
1. a kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant, including powder case processed（2）, super high speed motor（4）, centrifugal turntable
（6）, barrel（8）, high-speed electric expreess locomotive（9）, whirlwind rotating disk（10）, spray boom（12）, screen box（16）, vibrating motor（21）And stirring roller
（24）, it is characterised in that：The base（1）It is provided with powder case processed（2）, base（1）With powder case processed（2）Between fixed by screw
Connection, the powder case processed（2）Upper center position is installed with super high speed motor（4）, super high speed motor（4）Output axial direction
Descend and stretch into powder case processed（2）Inside, super high speed motor（4）Output shaft is connected with main shaft by shaft coupling（5）, main shaft（5）Lower end
It is fixedly connected with centrifugal turntable（6）, the powder case processed（2）Inside is additionally provided with barrel（8）, barrel（8）Inside for hollow-core construction and
Barrel（8）With powder case processed（2）It is fixedly connected between inwall by screw, barrel（8）Also it is made up of resistant to elevated temperatures metal material, institute
State centrifugal turntable（6）Positioned at barrel（8）Inside and centrifugal turntable（6）With barrel（8）Between for gap coordinate；The powder case processed
（2）High-speed electric expreess locomotive is installed with the outer wall of the left and right sides（9）, the powder case processed（2）Inside is also rotatablely equipped with whirlwind and turned
Disk（10）, whirlwind rotating disk（10）With high-speed electric expreess locomotive（9）Between connected by airduct, the whirlwind rotating disk（10）The other end also connect
It is connected to supercharging airduct（11）, it is pressurized airduct（11）Both ends diameter of bore be less than center section diameter of bore, the supercharging airduct
（11）The other end is connected with spray boom（12）；The powder case processed（2）Inside is additionally provided with screen box（16）, screen box（16）Both sides are provided with
Connecting rod（18）, connecting rod（18）With screen box（16）Between by being welded to connect, the powder case processed（2）Both sides outer wall also welds
There is fixed plate（19）, fixed plate（19）With the connecting rod of lower section（18）Between pass through spring（20）Connection, the screen box（16）
Bottom is provided with screen cloth（17）, screen cloth（17）Lower section is additionally provided with vibrating motor（21）；The powder case processed（2）It is also fixed in outer right wall
Motor is installed（22）, motor（22）Output shaft level to the left and stretch into powder case processed（2）Inside, motor
（22）Output shaft and powder case processed（2）Casing between be rotatablely connected by bearing, motor（22）Output shaft in powder processed
Case（2）Inside is fixedly connected with rotating shaft by shaft coupling（23）, rotating shaft（23）Upper interference fit is provided with stirring roller（24）, it is described
Powder case processed（2）Bottom, which is additionally provided with, draws flitch（25）, draw flitch（25）Height gradually successively decrease from centre to both sides, the powder case processed
（2）The left and right sides be also provided with powder case discharging opening processed（26）.
A kind of 2. liquid metals whirlwind aerosolization formula fuel pulverizing plant according to claim 1, it is characterised in that：The powder processed
Case（2）Upside is symmetrical to be provided with two groups of charging apertures（3）, charging aperture（3）On feed pipe is installed, feed pipe is by resistant to elevated temperatures conjunction
Golden material is made, and feed pipe stretches into powder case processed（2）It is internal.
A kind of 3. liquid metals whirlwind aerosolization formula fuel pulverizing plant according to claim 1, it is characterised in that：The centrifugation
Rotating disk（6）Inside is provided with material-holding chamber（7）, material-holding chamber（7）For semiellipse shape.
A kind of 4. liquid metals whirlwind aerosolization formula fuel pulverizing plant according to claim 1, it is characterised in that：The spray boom
（12）Inside is provided with wind chamber（13）, the spray boom（12）Side is also provided with some groups of air-out pores（14）, air-out pore（14）'s
A diameter of 1-1.5mm.
A kind of 5. liquid metals whirlwind aerosolization formula fuel pulverizing plant according to claim 1, it is characterised in that：The powder processed
Case（2）The left and right sides is also provided with air outlet（15）, air outlet（15）It is connected with the induced-draught fan of outside.
A kind of 6. liquid metals whirlwind aerosolization formula fuel pulverizing plant according to claim 1, it is characterised in that：The screen cloth
（17）On be evenly distributed with some groups of round sieves.
A kind of 7. liquid metals whirlwind aerosolization formula fuel pulverizing plant according to claim 1, it is characterised in that：The agitation
Roller（24）It is cylindrical on be evenly distributed with some groups of claws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710963195.3A CN107812953A (en) | 2017-10-17 | 2017-10-17 | A kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710963195.3A CN107812953A (en) | 2017-10-17 | 2017-10-17 | A kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107812953A true CN107812953A (en) | 2018-03-20 |
Family
ID=61608313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710963195.3A Withdrawn CN107812953A (en) | 2017-10-17 | 2017-10-17 | A kind of liquid metals whirlwind aerosolization formula fuel pulverizing plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107812953A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449602A (en) * | 2020-03-24 | 2020-07-28 | 佛山市顺德区美的洗涤电器制造有限公司 | Spray lance, connecting piece, connector, spray lance assembly and belt cleaning device |
| CN112091227A (en) * | 2020-10-16 | 2020-12-18 | 天工爱和特钢有限公司 | Powder-making and mixing integrated equipment for powder die steel metallurgy production and use method thereof |
| CN112974817A (en) * | 2021-02-04 | 2021-06-18 | 江苏威拉里新材料科技有限公司 | Device for producing metal powder for 3D printing through gas atomization |
| CN113798502A (en) * | 2021-09-16 | 2021-12-17 | 无锡锋速钢丸有限公司 | Cooling forming device and production process of stainless steel shot |
-
2017
- 2017-10-17 CN CN201710963195.3A patent/CN107812953A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449602A (en) * | 2020-03-24 | 2020-07-28 | 佛山市顺德区美的洗涤电器制造有限公司 | Spray lance, connecting piece, connector, spray lance assembly and belt cleaning device |
| CN111449602B (en) * | 2020-03-24 | 2021-08-06 | 佛山市顺德区美的洗涤电器制造有限公司 | Spray lance, connecting piece, connector, spray lance assembly and belt cleaning device |
| CN112091227A (en) * | 2020-10-16 | 2020-12-18 | 天工爱和特钢有限公司 | Powder-making and mixing integrated equipment for powder die steel metallurgy production and use method thereof |
| CN112974817A (en) * | 2021-02-04 | 2021-06-18 | 江苏威拉里新材料科技有限公司 | Device for producing metal powder for 3D printing through gas atomization |
| CN113798502A (en) * | 2021-09-16 | 2021-12-17 | 无锡锋速钢丸有限公司 | Cooling forming device and production process of stainless steel shot |
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Application publication date: 20180320 |
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