CN209754020U - Preparation device of spherical tungsten powder - Google Patents
Preparation device of spherical tungsten powder Download PDFInfo
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- CN209754020U CN209754020U CN201822224557.XU CN201822224557U CN209754020U CN 209754020 U CN209754020 U CN 209754020U CN 201822224557 U CN201822224557 U CN 201822224557U CN 209754020 U CN209754020 U CN 209754020U
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Abstract
The utility model discloses a preparation facilities of spherical tungsten powder relates to metal powder preparation field. Solves the problems of complex production process and low powder sphericity in the existing tungsten powder preparation process. The device includes: the plasma torch cathode part and the plasma torch anode part are oppositely arranged in the atomizing chamber; the inlet of the water inlet pipe is arranged outside the atomizing chamber, and the other end of the water inlet pipe extends into the atomizing chamber and is in contact with the plasma cathode part; the outlet of the water return pipe is arranged at the outer side of the atomizing chamber, and the other end of the water return pipe extends into the atomizing chamber and is communicated with the water inlet pipe; the water-cooling pipe traverses the atomizing chamber, and the part of the water-cooling pipe in the atomizing chamber is contacted with the plasma anode part; one end of the gas supply pipeline comprises two gas inlets positioned outside the atomizing chamber, and the gas outlet of the gas supply pipeline extends into the atomizing chamber, and the distance between the gas outlet of the gas supply pipeline and the cathode part of the plasma torch is smaller than that between the gas outlet of the gas supply pipeline and the anode part of the plasma torch; the cyclone separator and the vacuum system are respectively communicated with the atomizing chamber.
Description
Technical Field
the utility model relates to a metal powder technical field, more specifically relate to a preparation facilities of spherical tungsten powder.
Background
in recent years, spherical tungsten powder has been widely used in the fields of low-temperature molten metal porous filters, ionizers, and electron tube cathodes, and thermal spraying. At present, chemical vapor deposition is mostly adopted in China to act on tungsten hexafluoride gas to produce large-particle-size spherical tungsten powder with the particle size of 40-650 mu m. The method has complicated production process and low sphericity.
SUMMERY OF THE UTILITY MODEL
the embodiment of the utility model provides a preparation facilities of spherical tungsten powder reaches for it is more complicated to solve current production technology, and the powder that forms has the not high problem of sphericity.
the embodiment of the utility model provides a preparation facilities of spherical tungsten powder, include: a plasma torch system, an atomization chamber, a cyclone separator and a vacuum system;
The plasma torch system comprises a plasma torch cathode part, a plasma torch anode part, a water return pipe, a water inlet pipe, a water cooling pipe and a gas supply pipeline;
the plasma torch cathode part and the plasma torch anode part are oppositely arranged in the atomizing chamber;
The inlet of the water inlet pipe is arranged outside the atomizing chamber, and the other end of the water inlet pipe extends into the atomizing chamber and is in contact with the plasma cathode part; the outlet of the water return pipe is arranged at the outer side of the atomizing chamber, and the other end of the water return pipe extends into the atomizing chamber and is communicated with the water inlet pipe;
The water-cooling pipe traverses the atomizing chamber, and the part of the water-cooling pipe in the atomizing chamber is in contact with the plasma anode part;
one end of the gas supply pipeline comprises two gas inlets positioned outside the atomizing chamber, and the gas outlet of the gas supply pipeline extends into the atomizing chamber, and the distance between the gas outlet of the gas supply pipeline and the cathode part of the plasma torch is smaller than that between the gas outlet of the gas supply pipeline and the anode part of the plasma torch;
The cyclone separator and the vacuum system are respectively communicated with the atomizing chamber.
Preferably, one section of the water inlet pipe extending into the atomizing chamber comprises an inner ring and an outer ring, the inner ring is communicated with the inlet, the outer ring is in seamless contact with the plasma cathode component, and the part of the water return pipe extending into the atomizing chamber is in seamless contact with the outer ring.
Preferably, the import of wet return, the export of inlet tube with the air inlet of air feed line all sets up the intermediate position on the top of atomizer chamber.
Preferably, the cyclone separator comprises a cone, a powder inlet arranged on the cone, an air outlet and a fine powder collecting end;
The powder inlet is communicated with the atomizing chamber and is used for sucking tungsten powder with small particle size and hydrogen fluoride gas in the atomizing chamber, and the hydrogen fluoride gas is discharged out of the cyclone separator through the air outlet; the fine particle size tungsten powder having a small particle size falls down at the fine powder collection end.
Preferably, the device also comprises a coarse powder collecting end arranged at the lower end of the atomizing chamber and used for collecting the tungsten powder with larger particle size of the metal powder formed in the atomizing chamber;
preferably, the atomization chamber, the coarse powder collection end and the cyclone classifierThe vacuum degree of (2) reaches 5X 10-3Pa, and the pressure in the atomizing chamber is between 0.04 and 0.06 MPa.
Preferably, the gas supply pipeline is used for filling high-purity hydrogen and a mixed gas of tungsten hexafluoride and hydrogen into the atomization chamber, wherein the purity of the tungsten hexafluoride is greater than 99.999%, and the purity of the hydrogen is greater than 99.999%;
The pressure in the atomizing chamber is 0.04-0.06 MPa.
the volume ratio of the tungsten hexafluoride and the hydrogen included in the mixed gas is 1: 3.
The embodiment of the utility model provides a preparation facilities of spherical tungsten powder, the device includes: a plasma torch system, an atomization chamber, a cyclone separator and a vacuum system; the plasma torch system comprises a plasma torch cathode part, a plasma torch anode part, a water return pipe, a water inlet pipe, a water cooling pipe and a gas supply pipeline; the plasma torch cathode part and the plasma torch anode part are oppositely arranged in the atomizing chamber; the inlet of the water inlet pipe is arranged outside the atomizing chamber, and the other end of the water inlet pipe extends into the atomizing chamber and is in contact with the plasma cathode part; the outlet of the water return pipe is arranged at the outer side of the atomizing chamber, and the other end of the water return pipe extends into the atomizing chamber and is communicated with the water inlet pipe; the water-cooling pipe traverses the atomizing chamber, and the part of the water-cooling pipe in the atomizing chamber is in contact with the plasma anode part; one end of the gas supply pipeline comprises two gas inlets positioned outside the atomizing chamber, and the gas outlet of the gas supply pipeline extends into the atomizing chamber and is less than the distance between the gas outlet of the gas supply pipeline and the cathode part of the plasma torch; the cyclone separator and the vacuum system are respectively communicated with the atomizing chamber. The device heats the mixed gas of high-purity tungsten hexafluoride and hydrogen through the high-temperature plasma torch in the atomizing chamber, the mixed gas of the high-purity tungsten hexafluoride and the hydrogen generates chemical reaction to generate solid tungsten powder, and the tungsten powder can obtain better sphericity under the action of surface tension during solidification, and meanwhile, the whole preparation process has controllable reaction atmosphere, high speed, high efficiency and can realize continuous production. The device solves the problems that the existing tungsten powder production process is complex and the formed powder has low sphericity.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
fig. 1 is a schematic structural diagram of a device for preparing spherical tungsten powder according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of a plasma torch provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a preparation apparatus for spherical tungsten powder provided by an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a plasma torch provided by an embodiment of the present invention. As shown in FIG. 1, the apparatus mainly comprises a vacuum system 1, an atomization chamber 2, a coarse powder collection end 3, a plasma torch system 4, a cyclone separator 5 and a support platform 6. Wherein, plasma torch system 4 sets up in atomizing chamber 2, and plasma torch system 4 includes plasma torch negative pole part 10, plasma torch positive pole part 11, wet return 7, inlet tube 8, water-cooled tube 12 and gas supply line 9.
Specifically, as shown in fig. 2, the plasma torch cathode member 10 and the plasma torch anode member 11 are oppositely disposed in the atomizing chamber 2, and the distance between the plasma torch cathode member 10 and the tip of the atomizing chamber 2 is smaller than the distance between the plasma torch anode member 11 and the tip of the atomizing chamber 2.
In order to cool the plasma torch cathode member 10 and ensure the life of the plasma torch cathode, it is preferable that the plasma torch system 4 is in a transferred arc type operation mode, in which a water inlet pipe 8 and a water return pipe 7 are provided at the upper end of the plasma torch cathode member 10 in the atomizing chamber 2, and the temperature of the plasma torch cathode member 10 is reduced by the water inlet pipe 8 and the water return pipe 7. Specifically, as shown in fig. 2, the inlet of the water inlet pipe 8 is arranged outside the atomizing chamber 2, and the other end extends into the atomizing chamber 2, it should be noted that a section of the water inlet pipe 8 extending into the atomizing chamber 2 includes two layers of an inner ring and an outer ring, one end of the inner ring extending into the atomizing chamber 2 is communicated with the inlet of the water inlet pipe 8, the other end and the outer ring extend to the plasma torch cathode part 10 at the same time, and the outer ring is in seamless contact with the plasma torch cathode part 10; further, a water inlet pipe 8 of the water return pipe 7 extends into the atomizing chamber 2 and is in seamless contact with the outer ring, and an outlet of the water return pipe 7 is arranged outside the atomizing chamber 2.
In practical application, cooling water flows into the inner ring of the water inlet pipe 8 through the inlet of the water inlet pipe 8, when the cooling water flows into the accessory of the plasma torch cathode component 10, the cooling water flows into the outer ring from the inner ring, and the cooling water is in contact with the plasma torch cathode component 10 due to the seamless contact between the outer ring and the plasma torch cathode component 10, so that the effect of cooling the plasma torch cathode component 10 is achieved; further, the cooling water flows out of the atomizing chamber 2 through a return pipe 7 in contact with the outer ring.
in order to be able to cool the plasma torch anode part 11, to ensure the service life of the plasma torch anode part 11, etc., it is preferred that a water-cooled tube 12 is provided in the atomization chamber 2, the water-cooled tube 12 traverses the atomization chamber 2, and the portion of the water-cooled tube 12 in the atomization chamber 2 is in contact with the plasma torch anode part 11. By providing a water-cooled tube 12 near the plasma torch anode member 11, the plasma torch anode member 11 may be cooled, thereby determining the useful life of the plasma torch anode member 11.
Further, the gas is supplied into the plasma torch system 4 through two gas inlets of the gas supply pipeline 9, specifically, one end of the gas supply pipeline 9 comprises two gas inlets located outside the atomizing chamber 2, and a gas outlet of the gas supply pipeline 9 extends into the atomizing chamber 2 and is spaced from the plasma torch cathode part 10 by a distance smaller than that from the plasma torch anode part 11.
Through the gas supply pipeline 9, on one hand, hydrogen can be filled into the plasma torch system 4, so that the pressure in the vacuumized atomization chamber 2 reaches 0.04-0.06 MPa; on the other hand, the mixed gas of tungsten hexafluoride and hydrogen can be charged into the atomizing chamber 2 through two gas inlets provided outside the atomizing chamber 2.
In practical application, the plasma torch cathode part 10 and the plasma torch anode part 11 heat the mixed gas of tungsten hexafluoride and hydrogen, so as to generate reaction to generate tungsten powder with fine particle size and hydrogen fluoride gas. In the embodiment of the invention, the tungsten powder can be prepared by the method, so that the problems of complex process and low sphericity of the powder existing in the prior art of preparing the tungsten powder by adopting a tungsten raw material are different.
As shown in fig. 1, the embodiment of the present invention provides a preparation device for spherical tungsten powder, which includes a vacuum system 1 and an atomizing chamber 2, wherein a coarse powder collecting end 3 is disposed at the lower end of the atomizing chamber 2, a cyclone separator 5 is disposed in the atomizing chamber 2, and a support platform 6 is disposed in the atomizing chamber 2 and the cyclone separator 5.
In practical application, the vacuum system 1 is used for vacuumizing the atomizing chamber 2 and the cyclone separator 5; the coarse powder collecting end 3 is used for collecting the powder from the atomizing chamber 2; the cyclone separator 5 is used for sucking fine-particle-size tungsten powder and hydrogen fluoride gas with small particle sizes in the atomizing chamber 2.
as shown in fig. 1, the cyclone separator 5 provided by the embodiment of the present invention mainly includes a cavity, a powder inlet disposed on the cavity, an air outlet, and a fine powder collecting end; specifically, the powder inlet is communicated with the atomizing chamber 2 and is used for sucking the tungsten powder with small particle size and the hydrogen fluoride gas in the atomizing chamber 2, and further the hydrogen fluoride gas is discharged out of the cyclone separator 5 through the air outlet; the fine particle size tungsten powder having a small particle size falls to the fine powder collection end.
in order to introduce the preparation apparatus of spherical tungsten powder more clearly, the embodiment of the present invention provides a preparation method of spherical tungsten powder, which can understand the structure of the preparation apparatus of spherical tungsten powder and the specific powder process step more clearly.
The preparation method of the spherical tungsten powder mainly comprises the following steps:
the atomizing chamber 2, the coarse powder collecting end 3 and the cyclone separator are vacuumized by the vacuum system 1, and when the vacuum degree of the atomizing chamber 2, the coarse powder collecting end 3 and the cyclone separator 5 reaches 5 multiplied by 10-3After Pa, the vacuum-pumping operation was stopped.
Then high-purity hydrogen is filled into the atomizing chamber 2 and the cyclone separator 5, and the pressure in the atomizing chamber 2 is set to be 0.04-0.06 MPa.
And starting a power supply of the 100kW plasma torch system 4, ionizing the plasma torch cathode part 10 and the plasma torch anode part 11 which are arranged in the atomizing chamber 2 and the high-purity hydrogen filled in through the gas supply pipeline 9 to generate plasma arcs, wherein the temperature of the plasma arcs in the atomizing chamber 2 can reach 10000 degrees at most.
The mixed gas of tungsten hexafluoride and hydrogen is filled into the atomizing chamber 2 through two air inlets arranged outside the atomizing chamber 2. In practical application, the plasma torch cathode part 10 and the plasma torch anode part 11 heat the mixed gas of tungsten hexafluoride and hydrogen to react to generate tungsten powder with fine particle size and hydrogen fluoride gas; in the embodiment of the present invention, the purity of tungsten hexafluoride is greater than 99.999%, and the purity of hydrogen is greater than 99.999%, wherein the volume ratio of the mixed gas of tungsten hexafluoride and hydrogen is 1: 3.
Further, the flow rate of the mixed gas of tungsten hexafluoride and hydrogen is 60-100L/min, and it should be noted that in practical application, the flow rate and pressure of the mixed gas can be adjusted.
Further, the hydrogen fluoride gas is classified by the cyclone 5, and the solid tungsten powder is collected in the atomizing chamber 2 and the cyclone 5.
the mixed gas of tungsten hexafluoride and hydrogen is heated to generate chemical reaction to generate tungsten powder with fine particle size and hydrogen fluoride gas. Cyclone 5 with 2 UNICOMs of atomizer chamber at the during operation, can extract the hydrogen fluoride gas that forms in the atomizer chamber 2, when hydrogen fluoride gas enters into cyclone 5, can discharge away through the air outlet that sets up on 5 tops of cyclone, furtherly, when cyclone 5 extracts the hydrogen fluoride gas in atomizer chamber 2, can take out cyclone 5 simultaneously with the tungsten powder that has less particle diameter in the atomizer chamber 2 in, in the embodiment of the utility model provides an in, the tungsten powder that has less particle diameter in entering cyclone 5 can fall to the farine collection end that sets up in 5 cavity bottoms of cyclone 5. Furthermore, the particle diameter ratio of the tungsten powder not extracted by the cyclone 5 in the atomizing chamber 2 is large relative to the particle diameter ratio of the extracted tungsten powder, and the tungsten powder remaining in the atomizing chamber 2 can be collected by the coarse powder collecting end 3 disposed below the atomizing chamber 2.
the embodiment of the utility model provides an in, collect the end through setting up two tungsten powders, can distinguish the tungsten powder that has prepared according to the powder particle diameter naturally, improved the production efficiency of tungsten powder on the one hand, on the other hand, whole tungsten powder preparation process can be through the entering amount of control air inlet tungsten hexafluoride and hydrogen, the preparation speed of control tungsten powder, moreover, the mist of high-purity tungsten hexafluoride and hydrogen takes place chemical reaction and can produce solid-state tungsten powder, can obtain better sphericity under the surface tension effect during the tungsten powder solidification.
To sum up, the embodiment of the utility model provides a preparation facilities of spherical tungsten powder, the device includes: a plasma torch system, an atomization chamber, a cyclone separator and a vacuum system; the plasma torch system comprises a plasma torch cathode part, a plasma torch anode part, a water return pipe, a water inlet pipe, a water cooling pipe and a gas supply pipeline; the plasma torch cathode part and the plasma torch anode part are oppositely arranged in the atomizing chamber; the inlet of the water inlet pipe is arranged outside the atomizing chamber, and the other end of the water inlet pipe extends into the atomizing chamber and is in contact with the plasma cathode part; the outlet of the water return pipe is arranged at the outer side of the atomizing chamber, and the other end of the water return pipe extends into the atomizing chamber and is communicated with the water inlet pipe; the water-cooling pipe traverses the atomizing chamber, and the part of the water-cooling pipe in the atomizing chamber is in contact with the plasma anode part; one end of the gas supply pipeline comprises two gas inlets positioned outside the atomizing chamber, and the gas outlet of the gas supply pipeline extends into the atomizing chamber and is less than the distance between the gas outlet of the gas supply pipeline and the cathode part of the plasma torch; the cyclone separator and the vacuum system are respectively communicated with the atomizing chamber. The device heats the mixed gas of high-purity tungsten hexafluoride and hydrogen through the high-temperature plasma torch in the atomizing chamber, the mixed gas of the high-purity tungsten hexafluoride and the hydrogen generates chemical reaction to generate solid tungsten powder, and the tungsten powder can obtain better sphericity under the action of surface tension during solidification, and meanwhile, the whole preparation process has controllable reaction atmosphere, high speed, high efficiency and can realize continuous production. The device solves the problems that the existing tungsten powder production process is complex and the formed powder has low sphericity.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A spherical tungsten powder production apparatus, comprising: a plasma torch system, an atomization chamber, a cyclone separator and a vacuum system;
The plasma torch system comprises a plasma torch cathode part, a plasma torch anode part, a water return pipe, a water inlet pipe, a water cooling pipe and a gas supply pipeline;
The plasma torch cathode part and the plasma torch anode part are oppositely arranged in the atomizing chamber;
The inlet of the water inlet pipe is arranged outside the atomizing chamber, and the other end of the water inlet pipe extends into the atomizing chamber and is in contact with the plasma cathode part; the outlet of the water return pipe is arranged at the outer side of the atomizing chamber, and the other end of the water return pipe extends into the atomizing chamber and is communicated with the water inlet pipe;
the water-cooling pipe traverses the atomizing chamber, and the part of the water-cooling pipe in the atomizing chamber is in contact with the plasma anode part;
One end of the gas supply pipeline comprises two gas inlets positioned outside the atomizing chamber, and the gas outlet of the gas supply pipeline extends into the atomizing chamber, and the distance between the gas outlet of the gas supply pipeline and the cathode part of the plasma torch is smaller than that between the gas outlet of the gas supply pipeline and the anode part of the plasma torch;
The cyclone separator and the vacuum system are respectively communicated with the atomizing chamber.
2. The apparatus of claim 1, wherein a section of the water inlet pipe extending into the atomizing chamber includes two layers, an inner ring and an outer ring, the inner ring is communicated with the inlet, the outer ring is in seamless contact with the plasma cathode component, and a portion of the water return pipe extending into the atomizing chamber is in seamless contact with the outer ring.
3. The apparatus of claim 1, wherein the inlet of the water return pipe, the outlet of the water inlet pipe and the air inlet of the air supply pipe are disposed at a middle position of a top end of the atomization chamber.
4. The apparatus of claim 1, wherein the cyclone separator comprises a cone, a powder inlet disposed on the cone, an air outlet, and a fines collection end;
The powder inlet is communicated with the atomizing chamber and is used for sucking tungsten powder with small particle size and hydrogen fluoride gas in the atomizing chamber, and the hydrogen fluoride gas is discharged out of the cyclone separator through the air outlet; the fine particle size tungsten powder having a small particle size falls down at the fine powder collection end.
5. The apparatus according to claim 1, further comprising a coarse powder collecting end provided at a lower end of the atomizing chamber for collecting coarse-sized tungsten powder having a large particle size among the metal powder formed in the atomizing chamber.
6. The apparatus of claim 5, wherein the atomization chamber, the coarse powder collection end and the cyclone achieve a vacuum of 5 x 10-3Pa, and the pressure in the atomizing chamber is between 0.04 and 0.06 MPa.
7. The apparatus of claim 1, wherein the gas supply conduit is configured to supply high purity hydrogen gas and a mixture of tungsten hexafluoride and hydrogen gas into the atomization chamber, wherein the purity of the tungsten hexafluoride is greater than 99.999% and the purity of the hydrogen gas is greater than 99.999%;
The pressure in the atomizing chamber is 0.04-0.06 MPa;
the volume ratio of the tungsten hexafluoride and the hydrogen included in the mixed gas is 1: 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822224557.XU CN209754020U (en) | 2018-12-28 | 2018-12-28 | Preparation device of spherical tungsten powder |
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| CN201822224557.XU CN209754020U (en) | 2018-12-28 | 2018-12-28 | Preparation device of spherical tungsten powder |
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| CN209754020U true CN209754020U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396456A (en) * | 2018-12-28 | 2019-03-01 | 西安赛隆金属材料有限责任公司 | A kind of preparation facilities and method at globular tungsten powder end |
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2018
- 2018-12-28 CN CN201822224557.XU patent/CN209754020U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396456A (en) * | 2018-12-28 | 2019-03-01 | 西安赛隆金属材料有限责任公司 | A kind of preparation facilities and method at globular tungsten powder end |
| CN109396456B (en) * | 2018-12-28 | 2024-02-13 | 西安赛隆金属材料有限责任公司 | Preparation device and method of spherical tungsten powder |
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Address after: Room 303-46, building a, Kairui, Fengcheng 12th Road, Xi'an Economic and Technological Development Zone, Shaanxi 710018 Patentee after: Xi'an Sailong Additive Technology Co.,Ltd. Address before: 710020 middle section of Jinggao West Road, Jingwei new town new material industrial park, Xi'an Economic and Technological Development Zone, Xi'an City, Shaanxi Province Patentee before: XI'AN SAILONG METAL MATERIALS Co.,Ltd. |
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