CN110899713B - Novel close coupling gas atomizing nozzle - Google Patents
Novel close coupling gas atomizing nozzle Download PDFInfo
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- CN110899713B CN110899713B CN201911323841.5A CN201911323841A CN110899713B CN 110899713 B CN110899713 B CN 110899713B CN 201911323841 A CN201911323841 A CN 201911323841A CN 110899713 B CN110899713 B CN 110899713B
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- 238000010168 coupling process Methods 0.000 title claims description 6
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- 238000009689 gas atomisation Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 11
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- 229910000831 Steel Inorganic materials 0.000 abstract description 19
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- 239000002184 metal Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- 238000000889 atomisation Methods 0.000 description 9
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- 238000011010 flushing procedure Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
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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
- B22F9/082—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 atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
- B05B7/068—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet the annular gas outlet being supplied by a gas conduit having an axially concave curved internal surface just upstream said outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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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
- B22F9/082—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 atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
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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
- B22F9/082—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 atomising using a fluid
- B22F2009/0892—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 atomising using a fluid casting nozzle; controlling metal stream in or after the casting nozzle
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
- C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Nozzles (AREA)
- Glanulating (AREA)
Abstract
The invention relates to the field of preparation of vacuum induction gas atomization metal powder, and provides a novel tightly-coupled gas atomization nozzle suitable for preparing metal powder. The invention fully combines the conditions of strong negative pressure suction of the draft tube required by the tightly coupled nozzle for completely spraying the molten steel in the high-capacity tundish in the actual production process, and simultaneously ensures the key factors such as supersonic gas velocity, angle, gas-liquid ratio and the like required by atomized fine powder. The tightly coupled atomizing nozzle structure mainly comprises an air inlet channel, an air chamber, a circumferential seam spray pipe of a first air outlet channel, a plurality of annular hole structures of a second air outlet channel and a middle flow guide channel structure. The air chamber is simultaneously communicated with the air inlet channel, the second air outlet channel and the first air outlet channel. The second air outlet channel is closer to the nozzle air inlet channel than the first air outlet channel. The double-airflow-channel tightly-coupled nozzle provided by the invention is suitable for high-capacity tundish anti-hardening steel and can be used for efficiently preparing ultrafine spherical metal powder.
Description
Technical Field
The invention relates to the field of gas atomization powder preparation, in particular to a tightly coupled nozzle for preparing superfine spherical powder by a high-capacity tundish.
Background
With the development of technologies such as 3D printing, the demand for high sphericity powder is increasing. A powder preparation method by vacuum induction gas atomization is a method for efficiently preparing spherical metal powder. Wherein the close coupling nozzle structure of the core component determines the key factors such as the granularity, sphericity and the like of the final atomized powder.
The powder making nozzle in practical application at present mainly comprises a free-fall nozzle and a tightly coupled nozzle, and although the free-fall nozzle is simple in structure and can also finish the tilting atomization of the molten steel in a large tundish, the atomization efficiency is low, and the prepared powder is thick, so that the free-fall nozzle is not very suitable for producing fine powder in the large tundish.
In the actual gas atomization powder preparation process, the fine powder preparation is difficult to realize by improving the gas flow velocity at the outlet of the nozzle, so that most methods for preparing the fine powder are realized by reasonably determining the gas jet injection angle, slowing down the outflow speed of liquid flow in a tundish from the bottom of a flow guide pipe, improving the gas-liquid relative velocity and the gas-liquid ratio and achieving the purpose of preparing the fine powder. However, the method is generally only suitable for the tundish with small capacity and relatively small powder spraying amount, and for the tundish with large capacity and large powder spraying amount, the phenomenon that the guide pipe is steel-bonded and finally blocked along with the prolonging of the powder spraying time often occurs. Consequently design a nozzle that is fit for atomizing powder process of package in the middle of the large capacity to satisfy when having stronger suction to the interior molten steel of nozzle draft tube, can guarantee the gas-liquid ratio when atomizing again, strengthen gas-liquid interaction, and then make the molten steel broken abundant, have the realistic meaning of pressing and being important again.
Disclosure of Invention
The invention aims to provide an air atomization nozzle for preparing superfine spherical powder by using a high-capacity tundish, which can ensure that molten metal flows out quickly in a guide pipe to prevent scaling and pipe blockage, ensure the gas-liquid ratio of the molten metal during atomization, enhance the gas-liquid interaction during atomization, and ensure that the nozzle can prepare fine powder stably and efficiently for a long time.
The tight coupling nozzle is realized by the following steps:
the utility model provides a close coupling nozzle, includes nozzle body and honeycomb duct, its characterized in that:
the nozzle body is a ring body, and a hollow inner ring of the nozzle body forms a flow guide channel for placing a flow guide pipe;
an annular air chamber is formed inside the nozzle body, at least one air inlet channel is formed in the nozzle body, one end of the air inlet channel is opened on the side wall of the nozzle body, and the other end of the air inlet channel is opened on the wall of the annular air chamber, so that the annular air chamber is communicated with the outside of the nozzle body;
at least a first air outlet channel and a second air outlet channel are formed in the nozzle body at the lower part of the annular air chamber; one end of the first air outlet channel is opened at the lower part of the nozzle body, and the other end of the first air outlet channel is opened at the wall of the annular air chamber, so that the annular air chamber is communicated with the outside of the nozzle body; one end of the second air outlet channel is opened at the lower part of the nozzle body, and the other end of the second air outlet channel is opened at the wall of the annular air chamber, so that the annular air chamber is communicated with the outside of the nozzle body; the distance between the opening of the first air outlet channel at the lower part of the nozzle body and the liquid flow path sprayed by the nozzle is smaller than the distance between the opening of the second air outlet channel at the lower part of the nozzle body and the liquid flow path sprayed by the nozzle.
Further preferably, the direction of the gas flow ejected from the first gas outlet channel and the second gas outlet channel intersects with the liquid flow path.
Further preferably, an included angle formed by the intersection of the direction of the air flow sprayed from the first air outlet channel and the liquid flow path is 18-24 degrees.
Further preferably, an included angle formed by the intersection of the direction of the air flow sprayed from the second air outlet channel and the liquid flow path is 12-15 degrees.
Preferably, the number of the first air outlet channels is one, and the first air outlet channels are annular gaps, one end of each annular gap is opened at the annular air chamber, and the other end of each annular gap is opened at the lower part of the nozzle body.
Preferably, the inner circumferential surface of the annular gap-shaped first air outlet channel is a supersonic nozzle profile, the contraction section adopts a quintic curve or a bicubic curve, the throat section and the expansion section adopt MATLAB to write a calculation program, firstly, a one-dimensional flow theory is adopted to estimate the Mach number of the nozzle outlet, then, a characteristic line method is used for solving the core area of the flow field, the core area reaches the designed Mach number, the position of the outlet wall surface point is obtained according to the conservation of mass and the characteristic line, a quadratic function is used for obtaining the profile of the expansion section, and coordinates of other displacements of the circumferential seam profile are obtained by using a characteristic line method.
Further preferably, when the first air outlet channel starts from the annular air chamber, the air inlet position gradually shortens the cross section by combining an arc line and a straight line, so as to obtain stable inlet airflow.
Further preferably, the second gas outlet channel is a plurality of independent cylindrical gas channels with the diameter of 1.5-2.5 mm.
Further preferably, the number of the second air outlet channels is 8-18.
Further preferably, the position of the opening of the first air outlet channel at the lower part of the nozzle body is higher than the position of the opening of the second air outlet channel at the lower part of the nozzle body, so that the bottom surface of the nozzle body between the openings of the first air outlet channel and the second air outlet channel is in inclined surface transition, and an included angle between the inclined surface and a liquid flow path is 45-70 degrees.
The invention has the beneficial effects that: the tightly coupled nozzle for preparing the fine powder by the high-capacity tundish is obtained through the design, and is provided with an air flow channel and a liquid flow channel. The air flow channel is provided with a first air outlet channel and a second air outlet channel at the same time. This gas atomizing nozzle forms annular gas efflux through first outlet channel and guarantees the air current to the interior strong suction pressure of flow guide pipe, the stifled pipe phenomenon of knot steel that the time of preventing the large capacity tundish from dusting longer causes appears, the gas efflux that second outlet channel formed can effectually prevent the molten steel that the honeycomb duct bottom flows to the washing away of air current, the annular efflux that causes first gas outlet to form deflects and causes the appearance of atomization efficiency reduction phenomenon, strengthen gas-liquid interaction promptly, when making guarantee that the molten steel is high speed in the flow guide pipe and flowing and prevent the knot steel, the fine metal powder of preparation that can the high yield.
Drawings
For the purpose of clearly illustrating the technical aspects of the embodiments of the present invention, the drawings used in the embodiments will be described in detail below.
FIG. 1 is a schematic longitudinal sectional view of a tightly coupled nozzle for producing fine powder in a large-capacity tundish according to the present invention;
FIG. 2 is a schematic three-dimensional view of a tightly coupled nozzle of the present invention for producing fine powder in a large-capacity tundish;
FIG. 3 is a schematic longitudinal sectional view showing a state in which a tightly coupled nozzle for preparing fine powder in a large-capacity tundish according to the present invention is used;
FIG. 4 is a scanning electron microscope image of stainless steel 316L powder prepared by a preferred process.
Wherein, 1, an air inlet channel; 2. the upper part of the nozzle body; 3. an air chamber; 4. a flow guide channel; 5. a first air outlet channel; 6. a second air outlet channel; 7. the lower part of the nozzle body; 8. a first gas jet strike point; 9. a second gas jet strike point; 10. a fluid flow path; and 11, a flow guide pipe.
Detailed Description
The key of the invention for preparing the superfine spherical powder in the high-capacity tundish is as follows: 1) the flow velocity of the molten steel in the guide pipe is improved, the phenomenon of steel bonding in the middle of atomization is prevented, and the molten steel in the tundish is guaranteed to smoothly flow out. 2) The annular gas jet is prevented from deflecting under the high-speed continuous molten steel flushing to reduce the atomization efficiency. Therefore, the first air outlet channel ensures that the molten steel smoothly passes through the flow guide pipe through the shape of the double-outlet air flow channel; the second air outlet channel prevents the deflection of the first gas jet inside, and strengthens the interaction of the first gas jet on molten steel.
Please refer to fig. 1 to 4 for explanation.
Referring to fig. 1 and 2, the annular nozzle body of the close-coupled nozzle includes an upper nozzle body 2 and a lower nozzle body 7, and the flow channel of the close-coupled nozzle mainly includes an air inlet channel 1, an air chamber 3, a first air outlet channel 5 and a second air outlet channel 6.
Referring to fig. 1, the hollow inner ring of the nozzle body of the close-coupled nozzle is formed as a guide channel 4 for placing a guide tube, the guide channel 4 is used for placing a guide tube 11 for conveying molten steel, and the guide tube is placed into the guide channel 4 from the top of the nozzle. The material of the flow conduit is generally not limited, but in this example a ceramic flow conduit structure is used.
An annular air chamber 3 is formed inside the nozzle body, at least one air inlet channel 1 is formed in the nozzle body, one end of the air inlet channel 1 is opened on the side wall of the nozzle body, and the other end of the air inlet channel 1 is opened on the wall of the annular air chamber, so that the annular air chamber 3 is communicated with the outside of the nozzle body;
at least a first air outlet channel 5 and a second air outlet channel 6 are arranged in the nozzle body at the lower part of the annular air chamber 3; one end of the first air outlet channel 5 is opened at the lower part 7 of the nozzle body, and the other end is opened at the wall of the annular air chamber, so that the annular air chamber 3 is communicated with the outside of the nozzle body; one end of the second air outlet channel 6 is opened at the lower part 7 of the nozzle body, and the other end is opened at the wall of the annular air chamber, so that the annular air chamber 3 is communicated with the outside of the nozzle body; the distance between the opening of the first air outlet channel 5 at the lower part 7 of the nozzle body and the liquid flow path 10 sprayed by the nozzle is smaller than the distance between the opening of the second air outlet channel 6 at the lower part 7 of the nozzle body and the liquid flow path 10 sprayed by the nozzle.
In order to effectively suck and crush the liquid flow left at the bottom of the flow guide pipe, the direction of the gas flow ejected from the first gas outlet channel 5 and the second gas outlet channel 6 is preferably intersected with the liquid flow path 10.
Referring to fig. 1 and 2, the shape and number of the nozzle inlet channels 1 are not specified, but in this example, for the sake of simplicity of processing, the inlet channels 1 are arranged as cylindrical channels, the number being such as to form a rotating inlet flow, i.e. two inlets with a certain tangential angle are provided.
Referring to fig. 1, the gas chamber 3 is an annular cavity with a rotating structure. In this example, the second gas outlet channel 6 provided at the bottom of the gas chamber 3 is 8 to 18 independent cylindrical gas channels with a diameter of 1.5 to 2.5 mm; meanwhile, in order to enable the first gas outlet channel 5 to form high-quality gas jet flow, the section is gradually shortened near the first gas outlet channel 5 in a mode of combining an arc line and a straight line, and relatively stable gas is formed to enter the first gas outlet channel 5.
Referring to fig. 1, a first air outlet channel 5 is formed in a contraction portion of an air chamber 3 close to a middle flow guide channel 4, and is an annular gap, one end of the annular gap is opened in the annular air chamber 3, the other end of the annular gap is opened in a lower portion 7 of the nozzle body, an inner peripheral surface of the first air outlet channel 5 is of a supersonic nozzle structure, a contraction profile is a quintic curve or a bicubic curve, and a throat portion to an expansion section are obtained by iterative calculation through a characteristic line method.
Referring to fig. 3, in order to form a reasonable high-speed gas jet in the first gas outlet channel 5, ensure a strong pumping action on the intermediate draft tube, and suppress the occurrence of a steel-forming phenomenon caused by an excessively large tundish capacity during the powder making process, the included angle between the gas flow direction ejected from the first gas outlet channel 5 and the liquid flow path 10 is limited to 18-24 ℃.
Referring to fig. 3, in order to effectively enhance the atomization and fragmentation of the molten steel flowing out from the bottom of the draft tube through the second gas outlet channels 6 and prevent the high-speed gas jet formed by the first gas outlet channels 5 from deflecting under the complex flushing action of the molten steel, the included angle between the ejected gas flow direction of the second gas outlet channels 6 and the liquid flow path is limited to 12-15 ℃. At the same time, it is ensured that the first gas jet impact point 8 formed by the first outlet channel 5 is located above the second gas jet impact point 9 formed by the second outlet channel 6.
Referring to fig. 4, the nozzle structure of this example was atomized and sprayed with 316L of stainless steel under a main gas pressure of 3.5MPa, with a flow of molten steel of substantially 15kg/min, a fine powder particle size and a high sphericity.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. The utility model provides a close coupling nozzle, includes nozzle body and honeycomb duct, its characterized in that:
the nozzle body is a ring body, and a hollow inner ring of the nozzle body forms a flow guide channel for placing a flow guide pipe;
an annular air chamber is formed inside the nozzle body, at least one air inlet channel is formed in the nozzle body, one end of the air inlet channel is opened on the side wall of the nozzle body, and the other end of the air inlet channel is opened on the wall of the annular air chamber, so that the annular air chamber is communicated with the outside of the nozzle body;
at least a first air outlet channel and a second air outlet channel are formed in the nozzle body at the lower part of the annular air chamber; one end of the first air outlet channel is opened at the lower part of the nozzle body, and the other end of the first air outlet channel is opened at the wall of the annular air chamber, so that the annular air chamber is communicated with the outside of the nozzle body; one end of the second air outlet channel is opened at the lower part of the nozzle body, and the other end of the second air outlet channel is opened at the wall of the annular air chamber, so that the annular air chamber is communicated with the outside of the nozzle body; the distance between the opening of the first air outlet channel at the lower part of the nozzle body and the liquid flow path sprayed by the nozzle is smaller than the distance between the opening of the second air outlet channel at the lower part of the nozzle body and the liquid flow path sprayed by the nozzle;
an included angle formed by the intersection of the direction of the airflow sprayed from the first air outlet channel and the liquid flow path is 18-24 degrees;
the number of the first air outlet channels is one, the first air outlet channels are annular gaps, one ends of the annular gaps are opened in the annular air chamber, and the other ends of the annular gaps are opened at the lower part of the nozzle body; the inner peripheral surface of the annular gap-shaped first air outlet channel is a supersonic nozzle molded surface, a quintic curve or a bicubic curve is adopted for a contraction section, a calculation program is compiled from a throat part to an expansion section by using MATLAB, firstly, a one-dimensional flow theory is adopted to estimate the Mach number of an outlet of the nozzle, then, a characteristic line method is used for solving a core area of a flow field, the core area reaches the designed Mach number, the position of an outlet wall surface point is obtained according to conservation of mass and a characteristic line, a quadratic function is used for obtaining the molded surface of the expansion section, and a characteristic line method is used for obtaining parameter coordinates; the first air outlet channel starts from the annular air chamber, and the section of the first air outlet channel is gradually shortened in a mode of combining an arc line and a straight line so as to obtain stable air flow entering the first air outlet channel;
the position of the opening of the first air outlet channel at the lower part of the nozzle body is higher than that of the opening of the second air outlet channel at the lower part of the nozzle body, so that the bottom surface of the nozzle body between the openings of the first air outlet channel and the second air outlet channel is in inclined surface transition, and the included angle between the inclined surface and a liquid flow path is 45-70 degrees.
2. The close-coupled nozzle of claim 1, wherein the first and second air outlet channels emit air streams in directions that intersect the liquid flow path.
3. The close-coupled nozzle of claim 2, wherein an included angle formed by the intersection of the direction of the gas flow emitted from the second gas outlet channel and the liquid flow path is 12-15 degrees.
4. The close-coupled nozzle of claim 1, wherein the second gas outlet channel is a plurality of independent cylindrical gas channels with a diameter of 1.5-2.5 mm.
5. The close-coupled nozzle of claim 1, wherein the number of the second air outlet channels is 8-18.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911323841.5A CN110899713B (en) | 2019-12-20 | 2019-12-20 | Novel close coupling gas atomizing nozzle |
| JP2020208468A JP6922063B2 (en) | 2019-12-20 | 2020-12-16 | New tightly coupled air spray nozzle |
| DE102020134364.7A DE102020134364A1 (en) | 2019-12-20 | 2020-12-21 | A novel, tightly coupled aerosol nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911323841.5A CN110899713B (en) | 2019-12-20 | 2019-12-20 | Novel close coupling gas atomizing nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN110899713A CN110899713A (en) | 2020-03-24 |
| CN110899713B true CN110899713B (en) | 2020-09-08 |
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| CN201911323841.5A Active CN110899713B (en) | 2019-12-20 | 2019-12-20 | Novel close coupling gas atomizing nozzle |
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| JP (1) | JP6922063B2 (en) |
| CN (1) | CN110899713B (en) |
| DE (1) | DE102020134364A1 (en) |
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|---|---|---|---|---|
| CN111804925B (en) * | 2020-09-11 | 2020-12-11 | 陕西斯瑞新材料股份有限公司 | Method and device for preparing GRCop-42 spherical powder based on VIGA process |
| CN112091226B (en) * | 2020-10-29 | 2024-05-28 | 佛山中研磁电科技股份有限公司 | Stable spraying device |
| CN112809010A (en) * | 2020-12-29 | 2021-05-18 | 辽宁冠达新材料科技有限公司 | Preparation method of GH5188 cobalt-based high-temperature alloy powder for 3D printing |
| CN113681017B (en) * | 2021-09-22 | 2023-06-02 | 北京机科国创轻量化科学研究院有限公司 | Gas heating spiral-flow type tight coupling circular seam nozzle |
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| JPH0649512A (en) * | 1992-08-03 | 1994-02-22 | Hitachi Metals Ltd | Device for producing gas-atomized metal powder |
| JP2005139471A (en) * | 2003-11-04 | 2005-06-02 | Daido Steel Co Ltd | Gas atomizing nozzle, and metal melting/atomizing apparatus using the same |
| JP2005213617A (en) * | 2004-01-30 | 2005-08-11 | Daido Steel Co Ltd | Gas atomizing method and gas atomizing apparatus used in the same |
| JP4207954B2 (en) * | 2005-12-20 | 2009-01-14 | セイコーエプソン株式会社 | Metal powder production equipment |
| US9981315B2 (en) * | 2013-09-24 | 2018-05-29 | Iowa State University Research Foundation, Inc. | Atomizer for improved ultra-fine powder production |
| CN104057097B (en) * | 2014-06-09 | 2017-02-15 | 浙江亚通焊材有限公司 | Dual-ring supersonic atomizer |
| CN106180739B (en) * | 2016-10-10 | 2018-08-14 | 江西悦安超细金属有限公司 | A kind of aerosolization nozzle being used to prepare minute spherical powder |
| CN206215920U (en) * | 2016-11-21 | 2017-06-06 | 华南理工大学 | A kind of two-nozzle atomization device for preparing 3D printing globular metallic powder |
| CN206605034U (en) * | 2017-01-22 | 2017-11-03 | 广州纳联材料科技有限公司 | Aerosolization nozzle and gas atomization device |
| CN107900366B (en) * | 2017-12-27 | 2020-12-01 | 北京康普锡威科技有限公司 | Device and method for continuously preparing titanium or titanium alloy powder for 3D printing through gas atomization |
| CN208879705U (en) * | 2018-09-06 | 2019-05-21 | 上海电气集团股份有限公司 | A kind of metal powder atomizer being used to prepare increasing material manufacturing |
| CN109570517B (en) * | 2019-01-17 | 2020-05-12 | 北京科技大学 | Design method of supersonic laval nozzle structure alloy melt atomizer |
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2019
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| CN110899713A (en) | 2020-03-24 |
| JP6922063B2 (en) | 2021-08-18 |
| DE102020134364A8 (en) | 2021-08-19 |
| DE102020134364A1 (en) | 2021-06-24 |
| JP2021098893A (en) | 2021-07-01 |
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