CN112570722A - Device for preparing ultrafine powder by plasma arc atomization method - Google Patents
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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
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
Abstract
The invention discloses a device for preparing ultrafine powder by a plasma arc atomization method, which relates to the technical field of powder preparation, and adopts the technical scheme that the device comprises an atomization tank, wherein a melting heat-preserving furnace is arranged at the top of the atomization tank, a liquid guide pipe is arranged at the bottom of the melting heat-preserving furnace, and the liquid guide pipe guides a molten liquid in the melting heat-preserving furnace into the atomization tank in a liquid injection mode and forms liquid drops when the liquid is guided into the atomization tank; be provided with plasma atomizing spray gun system and be located the cooling gas entry of plasma atomizing spray gun system lower extreme on the lateral wall of atomizing jar, the tip of plasma atomizing spray gun system is formed with and is used for towards the liquid drop and with liquid drop heating fragmentation's plasma arc, the cooling gas entry is used for will smashing the liquid drop cooling and form the powder. The invention fills the blank of powder industrial production with the particle size of 1-20 mu m in the powder preparation, and expands the selection of raw materials in the powder preparation field to realize the preparation of metal and nonmetal ultrafine powder.
Description
Technical Field
The invention relates to the technical field of powder preparation, in particular to a device for preparing ultrafine powder by a plasma arc atomization method.
Background
The powder is used as an important industrial raw material and can be widely applied to the fields of automobiles, national defense, electronics, metallurgy, aerospace and the like. With the continuous improvement of powder preparation process and the continuous optimization of powder processing sintering and other processes, the preparation of high-performance powder becomes an urgent need.
At present, for the preparation of large-particle powder, an atomization method is generally applied in industry, and the method has the advantages of high production efficiency, simple equipment and the like. Among the atomization methods, water atomization and gas atomization are most widely used, i.e., a technique of rapidly atomizing molten metal into powder by using high-pressure gas or high-pressure liquid which impinges on a flow of molten metal at a high flow rate. The development of the atomization method has been about a hundred years, and the atomization method has been developed very well technically by continuously optimizing the nozzle structure, increasing the flow rate and pressure of the atomization medium, increasing the condensation speed and the like, and the prepared powder has the particle size distribution of 20-300 mu m, but the particle size distribution is wider and the ratio of small-particle-size powder is extremely low.
For the preparation of nano-powder, a gas phase method is generally applied in industry, that is, a solid is vaporized by using certain energy and then finally becomes nano-powder through processes such as chemical reaction or physical change. The nanometer powder prepared by the method has the particle size distribution of 10-100 nm.
Therefore, the powder prepared by the current powder preparation technology has a blank in particle size distribution, namely, ultrafine powder with the particle size of 1-20 mu m is difficult to obtain. According to the powder forming principle, before powder is pressed and formed, powder particles with different particle sizes need to be mixed, particularly, the size proportion of the particles in the powder needs to be adjusted, and small particles are filled into gaps among large particles to improve the apparent density of the large particles, so that the powder is beneficial to subsequent pressing, sintering and the like. According to the basic theory of free packing of powders, if the particle size ratio is 7:1, the well-mixed powder has a higher apparent density. Therefore, the preparation of the powder with the particle size of 1-20 μm is very important, and if the powder can be industrially produced in a large scale and applied to the field of materials, the mechanical properties, the electrical properties and other properties of the materials can be greatly improved.
In the prior art, in order to obtain ultrafine powder, a raw material is first made into ultrafine filaments or particles having a large particle size, and then the filament-shaped raw material is directly gasified by utilizing the high-temperature characteristics of plasma arc, and further cooled to obtain powder.
In addition, chinese patent No. CN209288280U discloses a method for producing powder by atomizing a high-melting metal, in which a heating and heat-insulating device is used to heat and insulate a molten liquid after melting raw materials.
However, the two modes utilize the high-temperature action of the plasma arc, and the particle size of the powder obtained by high-temperature evaporation is kept in a nanometer level, so that the requirement for industrially preparing the powder with the particle size of 1-20 mu m is not met; the first method is only suitable for metals or alloys which have good ductility, can be drawn into wires and have low boiling points, and has limited feeding; the second method has the problem of high production and manufacturing cost, so that the existing technology is difficult to meet the requirement of industrial preparation and needs to be improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for preparing ultrafine powder by a plasma arc atomization method, which has the effects of industrial production and ultrafine powder with the particle size of 1-20 mu m.
In order to achieve the purpose, the invention provides the following technical scheme:
a plasma arc atomization method prepares the apparatus of the superfine powder, including the atomization tank, the top of the said atomization tank has melting holding furnaces, there are liquid conduits in the bottom of the said melting holding furnace, the said liquid conduit introduces the molten liquid in the said melting holding furnace into the said atomization tank in the form of liquid injection, and form the liquid droplet while introducing into the atomization tank; be provided with plasma atomizing spray gun system and be located on the lateral wall of atomizing jar cooling gas entry of plasma atomizing spray gun system lower extreme, the tip of plasma atomizing spray gun system is formed with and is used for towards the liquid drop will liquid injection heating hits garrulous plasma arc, the cooling gas entry is used for will hitting garrulous liquid drop and cool off in the twinkling of an eye and form the powder.
By adopting the technical scheme, when the melted liquid in the melting and heat-preserving furnace enters the atomizing tank through the liquid guide pipe, liquid injection is formed in the liquid guide pipe, liquid drops are formed when the melted liquid leaves the liquid guide pipe and enters the atomizing tank, the melted liquid is smashed into superfine liquid drops under the action of a plasma arc generated by a plasma atomizing spray gun system, and then the superfine powder with the particle size smaller than 20 mu m is formed by cooling gas; furthermore, through the supersonic speed and high temperature characteristics of the plasma arc, the temperature of the atomization medium is obviously improved, and the kinetic energy of the plasma arc is increased, so that the effects of improving the atomization efficiency, reducing the average particle size of the powder and reducing the particle size distribution of the powder are realized; the device for preparing the ultrafine powder by the plasma arc atomization method has the effects of filling the blank of industrial production of the powder with the particle size of 1-20 mu m in the powder preparation, expanding the raw material selection in the powder preparation field and realizing the preparation of the ultrafine metal powder and the ultrafine nonmetal powder.
The invention is further configured to: the lower end of the atomization tank is provided with a powder collecting cylinder positioned at the bottom and a cloth bag collector positioned at the upper end of the powder collecting cylinder and used for collecting powder with the particle size of less than 20 mu m.
By adopting the technical scheme, the powder collecting cylinder is used for recovering the particle powder with larger particle size and reduced by gravity, and the powder with smaller particle size and particle size less than 20 mu m is recovered by the cloth bag collector, so that the aim of further improving the preparation efficiency and precision of the ultrafine powder is fulfilled.
The invention is further configured to: the cooling gas inlet is a cooling gas circulation inlet, the cloth bag collector is communicated with the cooling gas circulation inlet, and a cooling gas circulation outlet is arranged between the atomization tank and the cloth bag collector; and a high-pressure air circulating system is arranged between the cloth bag collector and the cooling air circulating inlet.
Through adopting above-mentioned technical scheme, high-pressure gas circulation system drive cooling gas recycles in the atomizing jar, when further reducing industrial production cost, takes out the powder that the particle size is less than 20 mu m from the atomizing jar through the cooling gas to collect through the sack collector, with the collection efficiency of effective promotion powder.
The invention is further configured to: the cooling air circulation inlets are arranged in two, are bilaterally symmetrical and are connected with the high-pressure air circulation system.
Through adopting above-mentioned technical scheme, show the efficiency that promotes the liquid drop that smashes become the powder under the cooling action to make the powder that obtains possess regular structure.
The invention is further configured to: the outer side of the liquid guide pipe is provided with a heat insulation material; the diameter of the catheter is 1-20mm, and the thickness of the heat-insulating material is 10-200 mm.
By adopting the technical scheme, the temperature and the diameter of the liquid injection are stably controlled, so that the aim of improving the powder preparation effect is fulfilled.
The invention is further configured to: the plasma atomization spray gun system is provided with at least two and is distributed in the periphery of the atomization tank in the equal radian circumferential direction.
Through adopting above-mentioned technical scheme, a plurality of plasma atomizing spray gun systems further heat and smash the liquid drop that gets into in the atomizer jar in coordination each other to realize showing the purpose that promotes powder preparation effect.
The invention is further configured to: the number of the plasma atomization spray gun systems is 2-8, and the vertical angle between the plasma atomization spray gun systems and the side wall of the atomization tank is 30-90 degrees.
By adopting the technical scheme, a plurality of plasma atomization spray gun systems are mutually cooperated; and further effective heating and crushing operation is carried out on the liquid drops entering the atomizing tank so as to achieve the purpose of remarkably improving the powder preparation effect.
The invention is further configured to: the distance from the port of the plasma atomization spray gun system to the bottom of the liquid guide pipe is more than 1 mm; the plasma atomization spray gun system adopts nitrogen, hydrogen, argon, helium or water vapor as working medium gas; and the power of the plasma atomization spray gun system is 5-100 kW.
By adopting the technical scheme, the effect of effectively obtaining the ultrafine powder with the particle size of 1-20 mu m is realized.
The invention is further configured to: the ratio of the diameter to the height of the atomization tank is 1: 1-8.
By adopting the technical scheme, the device for preparing the ultrafine powder by the plasma arc atomization method has the effects of industrial production and obtaining the ultrafine powder with the particle size of 1-20 mu m.
The invention is further configured to: the temperature of the liquid injection is higher than the melting point of the raw material by 100-1500 ℃; and the cooling gas in the high-pressure gas circulating system is nitrogen, argon or helium.
By adopting the technical scheme, the device for preparing the ultrafine powder by the plasma arc atomization method has the effects of industrial production and obtaining the ultrafine powder with the particle size of 1-20 mu m.
In conclusion, the invention has the following beneficial effects: melting and insulating the raw materials by a melting and insulating furnace, and controlling the temperature to be 100-1500 ℃ above the melting point of the raw materials; then pouring the molten liquid in the melting and heat preserving furnace into an atomizing tank through a liquid guide pipe; the plasma atomization spray gun system is matched with the cooling gas circulation inlet to obtain ultrafine powder with the particle size of 1-20 mu m, and the ultrafine powder enters the cloth bag collector through the cooling gas circulation outlet under the action of cooling gas while the powder collecting cylinder collects powder with larger particle size, so that the aim of remarkably improving the powder preparation efficiency is fulfilled, and the device for preparing ultrafine powder by the plasma arc atomization method has the effects of industrial production and obtaining ultrafine powder with the particle size of 1-20 mu m.
Drawings
Fig. 1 is a schematic structural diagram of the present embodiment.
Description of reference numerals: 1. a melting holding furnace; 2. a plasma atomizing spray gun system; 3. a catheter; 4. liquid injection; 5. an atomization interlayer; 6. a cooling gas circulation inlet; 7. a plasma arc; 8. powder; 9. an atomizing tank; 10. a powder collecting cylinder; 11. a cooling gas circulation outlet; 12. a bag collector; 13. high-pressure gas circulation system.
Detailed Description
In order to make the technical solution and advantages of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings.
It should be noted that the plasma atomizing torch system 2 indicated in the present application is composed of a plasma arc 7 generator, a water supply system, a power supply system and a gas supply system, which are required for generating a plasma arc 7, so as to achieve the purpose of providing the plasma arc 7 required for atomization; in the application, in order to obtain the powder 8 with the required particle size through the plasma arc 7, the heating and crushing effect of the plasma arc 7 on the molten liquid needs to be effectively controlled; and meanwhile, the form control and the temperature control of the molten liquid are combined, so that the effective acquisition and recovery of the powder 8 are realized.
Example one
As shown in figure 1, the device for preparing ultrafine powder by a plasma arc atomization method comprises an atomization tank 9. The ratio of the diameter to the height of the atomizer tank 9 is 1: 2. The atomizing tank 9 is used for directly obtaining the powder 8 with the required grain diameter so as to achieve the aim of industrially producing the powder 8 with the grain diameter of 1-20 mu m.
It should be mentioned that a melting holding furnace 1 is arranged on the top of the atomization tank 9, the metal or nonmetal material is in a molten state in the melting holding furnace 1, and the temperature of the molten liquid after heat preservation is higher than the melting point of the raw material by more than 100 ℃. In order to save energy and achieve the purpose of effectively obtaining the powder 8 with the required grain diameter, the temperature of the molten liquid is controlled to be higher than the melting point of the raw material by 120 ℃, 200 ℃ and 300 ℃ to 1500 ℃. A liquid guide pipe 3 is arranged at the bottom of the melting holding furnace 1. The liquid guide pipe 3 guides the molten liquid in the melting holding furnace 1 into the atomizing tank 9 in the form of liquid injection 4, and correspondingly, the temperature of the liquid injection 4 is 100-1500 ℃ higher than the melting point of the raw material, so as to realize the effect of effectively and industrially producing the powder 8 with the particle size of 1-20 mu m. The outside of the liquid guide tube 3 is provided with a heat insulating material. And the diameter of the liquid guide pipe 3 is 1mm, and the thickness of the heat insulation material is 20mm, so that the aims of stably controlling the temperature of the liquid injection 4 and improving the preparation effect of the powder 8 are fulfilled.
When the liquid injection 4 is guided into the atomizing pipe through the liquid guide pipe 3, the liquid injection 4 separated from the liquid guide pipe 3 forms liquid drops in a first dispersion state;
a plasma atomizing spray gun system 2 and a cooling gas inlet at the lower end of the plasma atomizing spray gun system 2 are arranged on the side wall of the atomizing tank 9. The distance from the plasma atomization spray gun system 2 to the bottom of the liquid guide pipe 3 is 1 mm; a plasma arc 7 for facing the liquid drops and heating and breaking the liquid drops is formed at the end part of the plasma atomizing spray gun system 2, so that the liquid drops heated and broken by the plasma arc 7 form a second dispersion form;
as the droplets forming the second dispersion form fall under the influence of gravity, they are cooled by the cooling gas at the cooling gas inlet, instantly cooling the droplets broken up into the second dispersion form and forming the desired powder 8.
As shown in fig. 1, an atomization partition 5 is arranged in the atomization tank 9, and the plasma atomization spray gun system 2 and the liquid guide tube 3 are both arranged above the atomization partition 5. In the using process of the device, when the melted liquid in the melting holding furnace 1 enters the atomizing tank 9 through the liquid guide pipe 3, liquid injection 4 is formed in the liquid guide pipe 3, liquid drops are formed when the melted liquid leaves the liquid guide pipe 3 and enters the atomizing tank 9, the melted liquid is smashed into superfine liquid drops under the action of a plasma arc 7 generated by a plasma atomizing spray gun system 2, and then the superfine powder 8 with the particle size of less than 20 mu m is formed after cooling by cooling gas; furthermore, through the supersonic speed and high temperature characteristics of the plasma arc 7, the temperature of the atomizing medium is obviously improved, and the kinetic energy of the medium is increased, so that the effects of improving the atomizing efficiency, reducing the average particle size of the powder 8 and reducing the particle size distribution of the powder 8 are realized; the device for preparing the ultrafine powder 8 by the plasma arc 7 atomization method has the effects of filling the blank of industrial production of the powder with the particle size of 1-20 mu m in the preparation of the powder 8 and expanding the selection of raw materials in the field of the preparation of the powder 8 so as to realize the preparation of the metal and nonmetal ultrafine powder 8.
In order to further improve the preparation efficiency and precision of the ultra-fine powder 8, a powder collecting cylinder 10 positioned at the bottom and a cloth bag collector 12 positioned at the upper end of the powder collecting cylinder 10 and used for collecting the powder 8 with the particle size of less than 20 microns are arranged at the lower end of the atomizing tank 9. The powder collecting cylinder 10 is used for recovering the granular powder 8 with larger particle size and reduced by gravity, and the powder 8 with smaller particle size and less than 20 μm particle size is recovered by the cloth bag collector 12, so that the powder 8 with larger particle size is collected by the powder collecting cylinder 10 and the powder 8 with smaller particle size is collected by the cloth bag collector 12 in the obtained powder 8, and the effect of low separation difficulty and suitability for industrial production is achieved.
As shown in fig. 1, the cooling gas inlet is a cooling gas circulation inlet 6, the bag collector 12 is communicated with the cooling gas circulation inlet 6, and a cooling gas circulation outlet 11 is arranged between the atomization tank 9 and the bag collector 12. Meanwhile, a high-pressure air circulation system 13 is arranged between the bag collector 12 and the cooling air circulation inlet 6. Therefore, the high-pressure air circulation system 13 drives the cooling air to be recycled in the atomization tank 9, so that the industrial production cost is further reduced, and meanwhile, the powder 8 with the particle size of less than 20 microns is taken out of the atomization tank 9 through the cooling air and collected by the cloth bag collector 12, and the collection efficiency of the powder 8 is effectively improved.
Note that two cooling air circulation inlets 6 are provided. And two cooling gas circulation inlets 6 are bilateral symmetry and are all connected with high-pressure gas circulation system 13, and then realize showing the effect that promotes the liquid drop that breaks up and become the efficiency of powder 8 under the cooling action to make the powder 8 that obtains possess regular structure.
In order to achieve the purpose of significantly improving the preparation effect of the powder 8, the plasma atomization spray gun system 2 is provided with at least two and is circumferentially distributed around the atomization tank 9 in an equal radian. Therefore, the plurality of plasma atomizing spray gun systems 2 are cooperated with each other to further heat and crush the liquid droplets entering the atomizing tank 9, so that when the cooling gas is cooled to form the powder 8, the powder 8 with the required particle size of 1-20 μm is obtained. While the plasma spray torch system 2 is perpendicular to the side wall of the atomization tank 9 at an angle of 30-90 deg., and in this embodiment 30 deg.. 2 plasma atomizing spray gun systems 2 are arranged, so that the 2 plasma atomizing spray gun systems 2 are mutually cooperated; and further effective heating and crushing operation is performed on the liquid droplets entering the atomizing tank 9.
It should be noted that nitrogen, hydrogen, argon, helium or water vapor is used as working medium gas in the plasma atomization spray gun system 2; in the embodiment, the working medium gas is nitrogen. And the power of the plasma atomizing spray gun system 2 is 5 kW. The cooling gas in the high pressure gas circulation system 13 is nitrogen, argon or helium, and in the present embodiment, the cooling gas is nitrogen. So that the device for preparing the ultrafine powder 8 by the plasma arc 7 atomization method has the effects of industrial production and ultrafine powder 8 with the particle size of 1-20 mu m.
Example two
The difference between the second embodiment and the first embodiment is that 5 plasma atomizing spray gun systems 2 are provided in the second embodiment, and the vertical angle between the plasma atomizing spray gun system 2 and the side wall of the atomizing tank 9 is 60 °.
EXAMPLE III
The third embodiment is different from the first embodiment in that 8 plasma atomizing spray gun systems 2 are provided, and the vertical angle between the plasma atomizing spray gun system 2 and the side wall of the atomizing tank 9 is 90 °.
Example four
The difference between the fourth embodiment and the first embodiment is that the plasma atomization spray gun system 2 in the fourth embodiment adopts argon as working medium gas; and the power of the plasma atomizing spray gun system 2 is 50 kW.
EXAMPLE five
The difference between the fifth embodiment and the first embodiment is that the plasma atomization spray gun system 2 in the fifth embodiment adopts helium as working medium gas; and the power of the plasma atomizing spray gun system 2 is 100 kW.
EXAMPLE six
The difference between the sixth embodiment and the first embodiment is that the distance from the plasma atomizing spray gun system 2 to the bottom of the liquid guide tube 3 in the sixth embodiment is 10 mm.
EXAMPLE seven
The seventh embodiment is different from the first embodiment in that the distance from the plasma atomizing spray gun system 2 to the bottom of the liquid guide tube 3 in the seventh embodiment is 20 mm.
Example eight
Example eight differs from example one in that the diameter to height ratio of the aerosol canister 9 in example eight is 1: 5.
Example nine
Example nine differs from example one in that the diameter to height ratio of the aerosol canister 9 in example nine is 1: 8.
Example ten
The tenth embodiment is different from the first embodiment in that the diameter of the catheter 3 in the tenth embodiment is 10mm, and the thickness of the heat insulating material is 100 mm.
EXAMPLE eleven
The difference between the eleventh embodiment and the first embodiment is that the diameter of the catheter 3 in the eleventh embodiment is 20mm, and the thickness of the thermal insulation material is 150 mm.
In conclusion, the raw materials are melted and insulated through the melting and heat-insulating furnace 1, and the temperature is controlled to be 100-1500 ℃ above the melting point of the raw materials; then the liquid guide pipe 3 pours the melting liquid in the melting holding furnace 1 into the atomization tank 9; the plasma atomization spray gun system 2 is matched with the cooling gas circulation inlet 6 to obtain ultrafine powder 8 with the particle size of 1-20 microns, and then when the powder collection cylinder 10 collects powder 8 with larger particle size, the ultrafine powder 8 enters the cloth bag collector 12 through the cooling gas circulation outlet 11 under the action of cooling gas, so that the purpose of remarkably improving the preparation effect of the powder 8 is realized, and the device for preparing the ultrafine powder 8 by the plasma arc 7 atomization method has the effects of industrial production and obtaining the ultrafine powder 8 with the particle size of 1-20 microns.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the present invention may occur to those skilled in the art without departing from the principle of the present invention, and such modifications and embellishments should also be considered as within the scope of the present invention.
Claims (10)
1. A device for preparing ultrafine powder by a plasma arc atomization method is characterized in that: the device comprises an atomizing tank (9), wherein a melting heat-preserving furnace (1) is arranged at the top of the atomizing tank (9), a liquid guide pipe (3) is arranged at the bottom of the melting heat-preserving furnace (1), and the liquid guide pipe (3) guides the molten liquid in the melting heat-preserving furnace (1) into the atomizing tank (9) in a liquid injection (4) mode and forms liquid drops when being guided into the atomizing tank (9); be provided with plasma atomizing spray gun system (2) and be located on the lateral wall of atomizing jar (9) cooling gas entry of plasma atomizing spray gun system (2) lower extreme, the tip of plasma atomizing spray gun system (2) is formed with and is used for the orientation the liquid drop and with liquid drop heating smash plasma arc (7), cooling gas entry is used for will smash the liquid drop and cool off in the twinkling of an eye and form powder (8).
2. A plasma arc atomization method for preparing superfine powder according to claim 1, which is characterized in that: the lower end of the atomization tank (9) is provided with a powder collecting cylinder (10) positioned at the bottom and a cloth bag collector (12) positioned at the upper end of the powder collecting cylinder (10) and used for collecting powder (8) with the particle size of less than 20 mu m.
3. A plasma arc atomization method for preparing superfine powder according to claim 2, which is characterized in that: the cooling gas inlet is a cooling gas circulation inlet (6), the cloth bag collector (12) is communicated with the cooling gas circulation inlet (6), and a cooling gas circulation outlet (11) is arranged between the atomization tank (9) and the cloth bag collector (12); and a high-pressure air circulating system (13) is arranged between the cloth bag collector (12) and the cooling air circulating inlet.
4. A plasma arc atomization method for preparing superfine powder according to claim 3, which is characterized in that: the cooling air circulation inlets (6) are arranged in two, and the two cooling air circulation inlets (6) are bilaterally symmetrical and are connected with the high-pressure air circulation system (13).
5. A plasma arc atomization method for preparing superfine powder according to claim 1, which is characterized in that: the outer side of the liquid guide pipe (3) is provided with a heat insulation material; the diameter of the liquid guide pipe (3) is 1-20mm, and the thickness of the heat insulation material is 10-200 mm.
6. A plasma arc atomization method for preparing superfine powder according to claim 1, which is characterized in that: the plasma atomization spray gun system (2) is provided with at least two and is distributed circumferentially around the atomization tank (9) in an equal radian manner.
7. A plasma arc atomization method for preparing superfine powder according to claim 6, which is characterized in that: the number of the plasma atomizing spray gun systems (2) is 2-8, and the vertical angle between the plasma atomizing spray gun systems (2) and the side wall of the atomizing tank (9) is 30-90 degrees.
8. A plasma arc atomization method for preparing superfine powder according to claim 7, which is characterized in that: the distance from the port of the plasma atomization spray gun system (2) to the bottom of the liquid guide pipe (3) is more than 1 mm; the plasma atomization spray gun system (2) adopts nitrogen, hydrogen, argon, helium or water vapor as working medium gas; and the power of the plasma atomization spray gun system (2) is 5-100 kW.
9. A plasma arc atomization method for preparing superfine powder according to claim 1, which is characterized in that: the ratio of the diameter to the height of the atomization tank (9) is 1: 1-8.
10. A plasma arc atomization method for preparing superfine powder according to claim 3, which is characterized in that: the temperature of the liquid injection (4) is higher than the melting point of the raw material by 100-1500 ℃; and the cooling gas in the high-pressure gas circulating system (13) is nitrogen, argon or helium.
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| CN202011495719.9A CN112570722A (en) | 2020-12-17 | 2020-12-17 | Device for preparing ultrafine powder by plasma arc atomization method |
| PCT/CN2021/119301 WO2022127244A1 (en) | 2020-12-17 | 2021-09-18 | Device for preparing ultrafine powder by plasma arc atomization method |
| JP2021199756A JP7386839B2 (en) | 2020-12-17 | 2021-12-09 | Plasma arc atomization ultrafine powder manufacturing equipment |
| TW110146429A TWI798989B (en) | 2020-12-17 | 2021-12-10 | Device for preparing ultrafine powder by plasma arc atomization method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321238A (en) * | 2021-06-04 | 2021-08-31 | 昆明理工大学 | Preparation method of nano ITO powder |
| CN114226739A (en) * | 2021-12-24 | 2022-03-25 | 湖州慧金材料科技有限公司 | Preparation method of metal powder |
| WO2022127244A1 (en) * | 2020-12-17 | 2022-06-23 | 江苏博迁新材料股份有限公司 | Device for preparing ultrafine powder by plasma arc atomization method |
| WO2022248981A1 (en) * | 2021-05-23 | 2022-12-01 | Abenz 81-40 | Method for treating gases and gas mixtures, by intermediate temperature plasma referred to as pit pttm, device and use |
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| JPS4925554B1 (en) * | 1969-05-16 | 1974-07-01 | ||
| JPS4920869B1 (en) * | 1970-06-08 | 1974-05-28 | ||
| JPS514951B1 (en) * | 1973-02-15 | 1976-02-16 | ||
| JPS62207802A (en) * | 1986-03-10 | 1987-09-12 | Hitachi Ltd | Apparatus for forming ultrafine particle |
| CA2000025A1 (en) * | 1989-10-02 | 1991-04-02 | Thomas Leslie Price | Baghouse |
| US5935461A (en) * | 1996-07-25 | 1999-08-10 | Utron Inc. | Pulsed high energy synthesis of fine metal powders |
| JP2000319706A (en) * | 1999-04-30 | 2000-11-21 | Mitsui Kinzoku Toryo Kagaku Kk | Producing equipment of zinc powder and its production |
| US20160332232A1 (en) * | 2015-05-14 | 2016-11-17 | Ati Properties, Inc. | Methods and apparatuses for producing metallic powder material |
| JP6544836B2 (en) * | 2017-07-03 | 2019-07-17 | 株式会社 東北テクノアーチ | Device and method for producing metal powder |
| JP6962825B2 (en) * | 2018-01-04 | 2021-11-05 | 日本電子株式会社 | High frequency induced thermal plasma device |
| CN109304471B (en) * | 2018-10-30 | 2023-10-03 | 湖南天际智慧材料科技有限公司 | Plasma atomizing powder process equipment suitable for high-melting point metal |
| CN209288280U (en) * | 2018-10-30 | 2019-08-23 | 湖南天际智慧材料科技有限公司 | A kind of plasma powder by atomization equipment suitable for refractory metal |
| CN109967755B (en) * | 2019-05-14 | 2023-08-18 | 湖州恒合科技有限公司 | Spherical fine metal powder production system and method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127244A1 (en) * | 2020-12-17 | 2022-06-23 | 江苏博迁新材料股份有限公司 | Device for preparing ultrafine powder by plasma arc atomization method |
| WO2022248981A1 (en) * | 2021-05-23 | 2022-12-01 | Abenz 81-40 | Method for treating gases and gas mixtures, by intermediate temperature plasma referred to as pit pttm, device and use |
| CN113321238A (en) * | 2021-06-04 | 2021-08-31 | 昆明理工大学 | Preparation method of nano ITO powder |
| CN114226739A (en) * | 2021-12-24 | 2022-03-25 | 湖州慧金材料科技有限公司 | Preparation method of metal powder |
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