CN116352096A - Plasma atomizing and spheroidizing device for preparing refractory metal spherical powder - Google Patents
Plasma atomizing and spheroidizing device for preparing refractory metal spherical powder Download PDFInfo
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- CN116352096A CN116352096A CN202310291834.1A CN202310291834A CN116352096A CN 116352096 A CN116352096 A CN 116352096A CN 202310291834 A CN202310291834 A CN 202310291834A CN 116352096 A CN116352096 A CN 116352096A
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- 239000000843 powder Substances 0.000 title claims abstract description 71
- 239000003870 refractory metal Substances 0.000 title claims abstract description 21
- 238000000889 atomisation Methods 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 9
- 239000011229 interlayer Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims 4
- 238000009792 diffusion process Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
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- 238000011197 physicochemical method Methods 0.000 description 3
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- 239000002245 particle Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
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- IADRPEYPEFONML-UHFFFAOYSA-N [Ce].[W] Chemical compound [Ce].[W] IADRPEYPEFONML-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
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Classifications
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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
- B22F9/14—Making metallic powder or suspensions thereof using physical processes using electric discharge
-
- 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
- B22F1/14—Treatment of metallic powder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Plasma Technology (AREA)
Abstract
The invention relates to the technical field of thermal plasma application, and particularly discloses a plasma atomization and spheroidization device for preparing refractory metal spherical powder, which comprises the following components: a direct current arc plasma torch for generating a plasma jet for atomizing a wire or spheroidizing a powder to produce a spherical powder; the feeding guide pipe is used for conveying wires or powder to enable the wires or powder to be fed into the plasma jet, and the torch fixing seat is used for detachably fixing the direct-current arc plasma torch and the feeding guide pipe. The invention adopts the direct current arc plasma torch jet as a heat source to atomize and spheroidize the wire or powder to prepare the spherical powder, meets the requirements of different application conditions of metal wire atomization and powder spheroidization to prepare the spherical powder on the performance of the plasma jet, and has lower running cost and good controllability.
Description
Technical Field
The invention relates to the technical field of thermal plasma application, in particular to a plasma atomizing and spheroidizing device for preparing refractory metal spherical powder.
Background
In recent years, the development of material manufacturing and processing technologies such as additive manufacturing (3D printing), thermal spraying and the like is rapid, and along with the rapid development of the material manufacturing and processing technologies, new requirements on the performance of powder such as sphericity, dispersity, purity and the like are put forward, wherein the sphericity, sphericity and the like are key indexes for the technical requirements of refractory metal powder materials. The research of the high-quality spherical refractory metal preparation technology has important significance for improving the performance and optimizing the process of molded parts in the processing and manufacturing fields such as additive manufacturing.
Currently, spherical refractory metal powders are prepared by means such as physicochemical methods, plasma spheroidization, plasma atomization, plasma rotating electrodes, and the like. The physicochemical methods such as vapor deposition method, hydrogenation and dehydrogenation have the defects of high energy consumption, high production cost, easy pollution generation and the like, while the plasma rotating electrode has the advantages of low fine powder yield with particle size smaller than 45 μm, pure high sphericity and the like, but the high-frequency thermal plasma spheroidization method has the risk of possible damage of a high-frequency plasma torch in the spheroidization process, low coupling efficiency and the like.
Disclosure of Invention
The invention aims to provide a plasma atomizing and spheroidizing device for preparing refractory metal spherical powder, which adopts direct-current arc plasma torch jet as a heat source to atomize and spheroidize wires or powder to prepare spherical powder, meets the requirements of different application working conditions of metal wire atomization and powder spheroidization to prepare spherical powder on the performance of the plasma jet, and has lower running cost and good controllability.
The invention is realized by the following technical scheme:
a plasma atomizing and spheroidizing apparatus for preparing a spherical powder of a refractory metal, comprising:
a direct current arc plasma torch for generating a plasma jet for atomizing a wire or spheroidizing a powder to produce a spherical powder;
a feeding guide pipe for conveying the wire or powder to the plasma jet,
the torch fixing seat is used for detachably fixing the direct-current arc plasma torch and the feeding guide pipe.
The key point of spherical powder preparation by taking thermal plasma as a high-temperature heat source is to generate high-strength plasma jet flow suitable for a flow field, wherein the flow field distribution form (comprising a temperature field, a speed field and the like) of the plasma jet flow is critical to the performance influence of powder atomization and spheroidization. Under the general condition, a direct current arc plasma torch is adopted as a high-temperature heat source, and the requirements of different application working conditions on plasma jet flow are different, for example, the plasma jet flow has larger arc volume and longer high-temperature area when powder is spheroidized and pulverized, so that the effective melting of the powder and the improvement of the efficiency are facilitated; the plasma jet speed is required to be higher and the temperature is higher during atomization powder preparation, which is favorable for effective breaking of molten drops and control of particle size. Aiming at the application requirement of the preparation of the spherical refractory metal powder, the requirements of the plasma torch are that the length, the speed, the temperature and other state parameters of the jet flow are modulated and matched so as to ensure the stability and the uniformity of the flow field and the quality of the spherical powder.
Therefore, the invention adopts the plasma jet generated by the direct current arc plasma torch as the heat source for metal powdering, atomizes and spheroidizes the wire or powder to prepare the spherical powder, meets the requirements of different application conditions of metal wire atomization and powder spheroidization to prepare the spherical powder on the performance of the plasma jet, and has the advantages of lower operation cost and good controllability compared with the existing physicochemical method, plasma spheroidization, plasma atomization, plasma rotating electrode and other methods.
Further, the torch fixing seat comprises a bottom plate, a solid table top used for fixing the direct-current arc plasma torch is arranged on the bottom plate, the solid table top is obliquely arranged, a torch mounting hole is formed in the solid table top, and the direct-current arc plasma torch is detachably mounted in the torch mounting hole; the solid table top is provided with a material guide pipe inserting opening, the material guide pipe inserting opening is vertically arranged, the material guide pipe is detachably fixed in the material guide pipe inserting opening, and the bottom plate is provided with a through hole for circulating plasma jet.
According to the invention, through reasonably designing the structure of the torch fixing seat, not only can the detachable fixation of the direct-current arc plasma torch and the feeding guide pipe be realized, but also the direct-current arc plasma torches with different numbers can be fixed according to the needs.
In addition, the plasma jet generated by a plurality of direct current arc plasma torches can be converged.
Further, the direct current arc plasma torch is provided with two at least, and a plurality of direct current arc plasma torches are arranged circumferentially, and the plasma jet that a plurality of direct current arc plasma torches produced gathers in the torch fixing base and forms the plasma jet that gathers, and the pay-off stand pipe sets up in the plasma jet top that gathers, the solid mesa quantity that sets up on the bottom plate is greater than or equal to the pay-off stand pipe, and a fixed pay-off stand pipe of solid mesa forms the passageway with the through-hole intercommunication between a plurality of solid mesas, gathers the plasma jet and flows out the torch fixing base through passageway, through-hole in proper order.
Further, the included angle between the central axis of the direct current arc plasma torch and the feeding guide pipe is 30-60 degrees.
Further, an insulating sealing gasket is arranged between the solid table top and the direct-current arc plasma torch, and the inner side and the outer side of the insulating sealing gasket are detachably connected with the direct-current arc plasma torch and the solid table top respectively.
Further, a cooling water inlet and a cooling water outlet are formed in the torch fixing seat, and a cooling channel communicated with the cooling water inlet and the cooling water outlet is formed in the torch fixing seat.
Further, the dc arc plasma torch includes a cathode assembly and an anode assembly, and an insulating sleeve positioned between the cathode assembly and the anode assembly; the anode assembly includes a nozzle.
Further, the nozzle is designed to be detachable, the nozzle comprises two designs of a converging-straight pipe type nozzle and a converging-diverging type Laval nozzle, and when plasma atomization is carried out to prepare powder, the anode component adopts the converging-straight pipe type nozzle; during spheroidization of the plasma powder, the anode assembly employs a converging-diverging laval nozzle.
Further, the feeding guide pipe comprises a guide pipe provided with a wire preheating mechanism and a guide pipe provided with an interlayer water cooling mechanism, when the wires are atomized, the guide pipe provided with the wire preheating mechanism is adopted, and when the powder is spheroidized, the guide pipe provided with the interlayer water cooling mechanism is adopted.
Further, the diameter of the feeding guide pipe is between 16 and 20 mm.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the plasma torch can stably operate under low air pressure, effectively reduces oxidation of powder at high temperature in the atomization and spheroidization process, and is convenient to maintain and overhaul due to independent cooling and insulation of each electrode and the fixing seat.
2. The invention integrates plasma atomization and spheroidization, and the nozzle and the feeding guide pipe adopt different structural designs to ensure the stability of a flow field, thereby meeting the requirements of different application conditions of atomization and spheroidization powder preparation and being convenient to replace.
3. The plasma atomizing and spheroidizing device is relatively simple and convenient to operate, low in running cost and good in controllability.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a plasma atomizing and spheroidizing apparatus according to the present invention;
FIG. 2 is a schematic view of a plasma atomizing nozzle;
FIG. 3 is a schematic view of a plasma spheroidizing nozzle.
In the drawings, the reference numerals and corresponding part names:
1-a direct current arc plasma torch; a 2-cathode assembly; a 3-anode assembly; 4-an insulating sleeve; 5-nozzle; 6-a torch fixing seat; 7-a feeding guide pipe; 8-converging the plasma jet; 9-insulating sealing gaskets; 10-feed inlet.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1:
as shown in fig. 1 to 3, a plasma atomizing and spheroidizing apparatus for preparing a refractory metal spherical powder, comprising:
a dc arc plasma torch 1 for generating a plasma jet for atomizing a wire or spheroidizing a powder to produce a spherical powder.
The direct current arc plasma torch 1 comprises a cathode assembly 2 and an anode assembly 3, and an insulating sleeve 4 positioned between the cathode assembly 2 and the anode assembly 3; the anode component 3 comprises a nozzle 5, the nozzle 5 is used as an anode of the direct current arc plasma torch 1, and meanwhile, the distribution of plasma jet is controlled, and the material of the anode component is red copper; the nozzle 5 is of a detachable design, the nozzle 5 comprises a converging-straight pipe type nozzle and a converging-diverging type Laval nozzle, and the anode assembly 3 adopts the converging-straight pipe type nozzle when the plasma is atomized to prepare powder; the anode assembly 3 employs a converging-diverging laval nozzle during spheroidization of the plasma powder.
The cathode assembly 2 comprises a cathode fixing seat, a cathode head and a cathode water cooling jacket; the cathode fixing seat and the cathode head are coaxially arranged in a hot press fit manner to form a cathode, and the cathode fixing seat and the cathode head are made of red copper and cerium tungsten; one end of the cathode water cooling sleeve is provided with a cooling water inlet, and the side surface of the cathode water cooling sleeve is provided with a cooling water outlet; and one end of the cathode fixing seat is connected with the cathode water cooling sleeve by adopting threads and is sealed with the rubber sealing ring.
The anode assembly 3 comprises an anode with a Laval structure design and an anode water cooling jacket; the anode is made of red copper, is a nozzle of plasma jet flow, and is designed in a Laval type structure; cooling water inlets and outlets are arranged on two symmetrical sides of the anode water cooling sleeve; the anode is positioned in the anode water cooling sleeve and is fixedly connected with the inner layer sleeve body of the anode cooling sleeve in a sealing way; the anode water cooling jacket is provided with a working medium gas inlet.
The insulating sleeve 4 is positioned outside the cathode water cooling jacket and is provided with a certain gap with the cathode water cooling jacket as a working medium gas channel, and the gap is communicated with an anode channel on the anode; the insulating sleeve is tightly attached to the inner layer sleeve body of the anode water cooling sleeve, 10 working medium gas inlet holes are uniformly arranged on the circumference of the insulating sleeve, and one working medium gas inlet hole is communicated with the working medium gas inlet hole on the anode water cooling sleeve.
The cathode component 2, the anode component 3 and the insulating sleeve 4 are coaxially arranged to form a direct current non-transferred arc plasma torch, and the plasma torch can work in a low-pressure environment with the absolute pressure ranging from 10 Pa to 80000Pa.
A feeding guide pipe 7 for conveying the wire or powder so that the wire or powder is fed into the plasma jet, specifically, a feeding inlet 10 is provided on the central axis of the feeding guide pipe 7, and the wire or powder is fed into the plasma jet through the feeding inlet 10.
The feeding guide pipe 7 comprises a guide pipe provided with a wire preheating mechanism and a guide pipe provided with an interlayer water cooling mechanism, when the wires are atomized, the guide pipe provided with the guide pipe is made of high-temperature resistant ceramic materials, the wire preheating mechanism can adopt any existing heating technology, can be a heating wire or a heating belt wound on the guide pipe, when powder is spheroidized, the guide pipe provided with the interlayer water cooling mechanism is adopted, namely the feeding guide pipe 7 is provided with an interlayer, the interlayer is matched with a water inlet and a water outlet, and cooling of the feeding guide pipe 7 is realized by introducing cold water into the interlayer so as to prevent the feeding guide pipe from being inserted into a high-temperature area of plasma jet to be melted and damaged. The diameter of the feeding guide pipe 7 is between 16 and 20 mm.
As shown in fig. 2 and 3, when the plasma is atomized to prepare powder, a converging-straight pipe type nozzle design is adopted, so that the speed of the plasma jet and the crushing effect of wires are improved; when the plasma powder is spheroidized, a convergent-divergent Laval nozzle design is adopted, which is beneficial to increasing the arc volume area and improving the spheroidization efficiency.
The torch fixing seat 6 is used for detachably fixing the direct-current arc plasma torch 1 and the feeding guide pipe 7;
the torch fixing seat 6 comprises a bottom plate 61, a solid table top 62 for fixing the direct current arc plasma torch 1 is arranged on the bottom plate 61, the solid table top 62 is obliquely arranged, a torch mounting hole is formed in the solid table top 62, the direct current arc plasma torch 1 is detachably mounted in the torch mounting hole, and an included angle between the central axis of the direct current arc plasma torch 1 and the feeding guide pipe 7 is 30-60 degrees; specifically, an insulating sealing gasket 9 is arranged between the solid table 62 and the direct current arc plasma torch 1, the inner side and the outer side of the insulating sealing gasket 9 are respectively connected with the direct current arc plasma torch 1 and the solid table 62 through bolts, a material guide pipe insertion opening is arranged on the solid table 62, the material guide pipe insertion opening is vertically arranged, a material guide pipe 7 is detachably fixed in the material guide pipe insertion opening, and a through hole for circulating plasma jet is arranged on the bottom plate 61.
In a specific preferred case, at least two direct current arc plasma torches 1 are arranged, a plurality of direct current arc plasma torches 1 are circumferentially arranged, plasma jet generated by the plurality of direct current arc plasma torches 1 are converged in a torch fixing seat 6 to form converged plasma jet 8, a feeding guide pipe 7 is arranged above the converged plasma jet 8, the number of solid table tops 62 arranged on a bottom plate 61 is greater than or equal to that of the feeding guide pipe 7, one feeding guide pipe 7 is fixed on one solid table top 62, a channel communicated with a through hole is formed among the plurality of solid table tops 62, and the converged plasma jet 8 flows out of the torch fixing seat 6 through the channel and the through hole in sequence.
In a particularly preferred case, the torch fixing seat 6 is provided with a cooling water inlet and a cooling water outlet, and a cooling channel which is communicated with the cooling water inlet and the cooling water outlet is arranged in the torch fixing seat 6.
Exemplary: as shown in fig. 1, cooling water inlets and outlets are arranged at the bottom and the top of the torch fixing seat 6, and the material is 304 stainless steel; the torch fixing seat 6 is provided with 3 solid table boards 62, the normal angle between every two adjacent solid table boards 62 is 120 degrees, the angle between the normal line of each solid table board 62 and the central axis (the central axis of the feeding guide pipe 7) is 30 degrees, and the center of each solid table board 62 is provided with a torch mounting hole; the top of the torch fixing seat 6 is provided with a feeding guide pipe 7 insertion opening; the torch holder 6 has an outlet for guiding out the converging plasma jet 8, the outlet diameter being 50mm, the outlet being constituted by the through hole and the channel as described above. The 3 direct current arc plasma torches 1 and the insulating sealing gasket 9 are coaxially arranged on the torch fixing seat 6 sequentially through screw fixation, the feeding guide pipe 7 is axially inserted into the central area of the plasma jet and is fixed at the top of the torch fixing seat 6 through screws, and the plasma atomizing and spheroidizing device is formed together
The working principle of this embodiment is as follows:
when the device works, high voltage of more than 1 ten thousand volts is applied between the cathode component 2 and the anode component 3, working medium gas fed into the direct current arc plasma torch 1 breaks down to form a converging plasma jet 8, metal wires or micron-sized powder are axially fed into the center of the converging plasma jet 8 formed by 3 bundles of plasma jet through a feeding inlet 10 through a feeding guide pipe 7, and the wires and the powder are atomized and spheroidized through the converging plasma jet 8 to form liquid drops, and finally spherical powder is formed and collected.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are for understanding and reading only by those skilled in the art, and are not intended to limit the scope of the invention, so that any structural modifications, proportional changes, or size adjustments should fall within the scope of the invention without affecting the efficacy and achievement of the present invention. Also, the terms such as "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.
Claims (10)
1. A plasma atomizing and spheroidizing apparatus for preparing a spherical powder of a refractory metal, comprising:
a direct current arc plasma torch (1) for generating a plasma jet for atomizing a wire or spheroidizing a powder to produce a spherical powder;
a feeding guide pipe (7) for conveying the wire or powder to the plasma jet,
the torch fixing seat (6) is used for detachably fixing the direct-current arc plasma torch (1) and the feeding guide pipe (7).
2. A plasma atomizing and spheroidizing apparatus for producing refractory metal spherical powder according to claim 1, wherein the torch holder (6) comprises a bottom plate (61), a solid table (62) for fixing a dc arc plasma torch (1) is provided on the bottom plate (61), the solid table (62) is provided obliquely, a torch mounting hole is provided on the solid table (62), and the dc arc plasma torch (1) is detachably mounted in the torch mounting hole; the solid table-board (62) is provided with a material guiding pipe inserting opening, the material guiding pipe inserting opening is vertically arranged, the material feeding guiding pipe (7) is detachably fixed in the material guiding pipe inserting opening, and the bottom board (61) is provided with a through hole for circulating plasma jet.
3. The plasma atomizing and spheroidizing device for preparing refractory metal spherical powder according to claim 2, wherein at least two direct current arc plasma torches (1) are arranged circumferentially, a plurality of direct current arc plasma torches (1) are arranged circumferentially, plasma jet generated by the plurality of direct current arc plasma torches (1) are converged in a torch fixing seat (6) to form converged plasma jet (8), a feeding guide pipe (7) is arranged above the converged plasma jet (8), the number of solid table tops (62) arranged on the bottom plate (61) is larger than or equal to that of the feeding guide pipe (7), one solid table top (62) is used for fixing one feeding guide pipe (7), a channel communicated with a through hole is formed between the plurality of solid table tops (62), and the converged plasma jet (8) flows out of the torch fixing seat (6) through the channel and the through hole sequentially.
4. A plasma atomizing and spheroidizing apparatus for producing refractory metal spherical powder as claimed in claim 3, wherein the angle between the central axis of the dc arc plasma torch (1) and the feed guide tube (7) is 30 ° -60 °.
5. The plasma atomizing and spheroidizing apparatus for preparing refractory metal spherical powder according to claim 2, wherein an insulating sealing gasket (9) is arranged between the solid table top (62) and the direct current arc plasma torch (1), and the inner side and the outer side of the insulating sealing gasket (9) are detachably connected with the direct current arc plasma torch (1) and the solid table top (62) respectively.
6. The plasma atomizing and spheroidizing apparatus for preparing refractory metal spherical powder according to claim 2, wherein a cooling water inlet and a cooling water outlet are provided on the torch holder (6), and a cooling channel communicating the cooling water inlet and the cooling water outlet is provided in the torch holder (6).
7. A plasma atomizing and spheroidizing apparatus for producing refractory metal spherical powder according to claim 1, wherein the dc arc plasma torch (1) comprises a cathode assembly (2) and an anode assembly (3), and an insulating sleeve (4) between the cathode assembly (2) and the anode assembly (3); the anode assembly (3) comprises a nozzle (5).
8. The plasma atomizing and spheroidizing apparatus for preparing the spherical refractory metal powder of claim 7, wherein the said spray nozzle (5) is removable design, the said spray nozzle (5) includes converging-straight tube type spray nozzle and converging-diffusion type Laval nozzle two kinds of designs, while atomizing the powder preparation in plasma, the positive pole assembly (3) adopts converging-straight tube type spray nozzle; during spheroidization of the plasma powder, the anode assembly (3) employs a converging-diverging laval nozzle.
9. The plasma atomizing and spheroidizing apparatus for preparing refractory metal spherical powder as recited in claim 8, wherein the feeding guide tube (7) comprises two designs of a guide tube provided with a wire preheating mechanism and a guide tube provided with an interlayer water cooling mechanism, the guide tube provided with the wire preheating mechanism is adopted during wire atomization, and the guide tube provided with the interlayer water cooling mechanism is adopted during powder spheroidization.
10. A plasma atomizing and spheroidizing apparatus for producing refractory metal spherical powder according to any one of claims 1-9, wherein the diameter of the feed guide tube (7) is between 16-20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310291834.1A CN116352096A (en) | 2023-03-23 | 2023-03-23 | Plasma atomizing and spheroidizing device for preparing refractory metal spherical powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310291834.1A CN116352096A (en) | 2023-03-23 | 2023-03-23 | Plasma atomizing and spheroidizing device for preparing refractory metal spherical powder |
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| Publication Number | Publication Date |
|---|---|
| CN116352096A true CN116352096A (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310291834.1A Pending CN116352096A (en) | 2023-03-23 | 2023-03-23 | Plasma atomizing and spheroidizing device for preparing refractory metal spherical powder |
Country Status (1)
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|---|---|
| CN (1) | CN116352096A (en) |
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2023
- 2023-03-23 CN CN202310291834.1A patent/CN116352096A/en active Pending
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