CN110883338A - Device for preparing micro-nano powder material by radio frequency plasma - Google Patents
Device for preparing micro-nano powder material by radio frequency plasma Download PDFInfo
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- CN110883338A CN110883338A CN201911269451.4A CN201911269451A CN110883338A CN 110883338 A CN110883338 A CN 110883338A CN 201911269451 A CN201911269451 A CN 201911269451A CN 110883338 A CN110883338 A CN 110883338A
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- 239000000463 material Substances 0.000 title claims abstract description 46
- 239000011858 nanopowder Substances 0.000 title claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 104
- 238000003723 Smelting Methods 0.000 claims abstract description 72
- 239000000843 powder Substances 0.000 claims abstract description 58
- 238000002844 melting Methods 0.000 claims abstract description 52
- 230000008018 melting Effects 0.000 claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 36
- 230000006698 induction Effects 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 239000000725 suspension Substances 0.000 claims description 16
- 238000000889 atomisation Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 15
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009835 boiling Methods 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract description 2
- 238000010494 dissociation reaction Methods 0.000 abstract description 2
- 230000005593 dissociations Effects 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 abstract description 2
- 238000002309 gasification Methods 0.000 abstract description 2
- 238000010899 nucleation Methods 0.000 abstract description 2
- 230000006911 nucleation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000000155 melt Substances 0.000 description 8
- 238000009413 insulation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 238000005339 levitation Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000005092 sublimation method Methods 0.000 description 1
Images
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
- B22F1/054—Nanosized particles
Abstract
The invention provides a device for preparing a micro-nano powder material by using radio frequency plasma, which comprises a vacuum smelting chamber, an atomizing chamber and a powder collecting system, wherein the upper end of the atomizing chamber is provided with the vacuum smelting chamber, the lower end of the atomizing chamber is connected with the powder collecting system through a pipeline, the bottom of the atomizing chamber is provided with a first powder collector, the top in the atomizing chamber is provided with a plasma atomizing device, and the vacuum smelting chamber is internally provided with a processing device for melting a raw material rod. The scheme directly sends the smelted molten metal flow beam into the radio frequency plasma torch, thereby saving the working procedure, the cost and the loss, and reducing the probability of raw material pollution; raw materials after the smelting treatment have high temperature, are closer to the boiling point of the raw materials, are more beneficial to excitation, gasification and dissociation in a plasma torch, are cooled in a reaction chamber to form nucleation and condensation into micro-nano powder, effectively improve the processing efficiency and quality, facilitate the loss of energy sources, and effectively improve the purity of the powder.
Description
Technical Field
The invention relates to plasma metal powder manufacturing equipment, in particular to a device for preparing a micro-nano powder material by using radio frequency plasma.
Background
Along with the development and progress of science and technology, the requirement of each field to the material also increases gradually, the applied field of nano-material metal powder is more and more extensive, also higher and more to the production requirement, and the volume of demand is also bigger and more, it is more extensive to use in 3D prints, the temperature when nevertheless metal melt liquid in the production process through plasma atomization is at the high temperature of several thousand degrees, need cool down the processing to it, then collect metal powder, conventional production process is all processing after smashing raw and other materials earlier, impurity is more in the course of working, energy loss increases.
Patent No. CN108213449A discloses an apparatus for preparing titanium-based powder material, which is characterized by at least comprising: a vacuum chamber, a feeding chamber is arranged above the vacuum chamber; the magnetic suspension smelting furnace is arranged in the vacuum chamber; the atomizing chamber is arranged below the vacuum chamber and is connected with the vacuum chamber into a whole; and the powder collecting unit comprises a powder collecting chamber arranged below the atomizing chamber. When the magnetic suspension smelting furnace works, after high-frequency alternating current is conducted to the magnetic suspension smelting furnace, a high-frequency alternating magnetic field is generated in the space around the coil, and the high-frequency alternating magnetic field generates induced eddy current in furnace materials. The interaction of the induced eddy and the external alternating magnetic field causes the furnace burden to generate suspension force, the suspension force balances with the self weight of the material to cause the material to suspend, simultaneously, the eddy loop generates a large amount of heat to cause the furnace burden to melt rapidly, and the melt is subjected to deslagging, degassing and purification under the action of strong electromagnetic stirring. And (3) dropping the purified melt into an air atomization chamber by controlling a magnetic field, and atomizing the melt into titanium-based powder under the action of a supersonic high-pressure argon atomizer and a cooling device. However, this device has the following disadvantages: 1. the raw material must be a powdery material, which requires a preliminary powdering treatment of the raw material, increasing the process flow, cost and raw material loss. In addition, the increased process steps also increase the probability of the raw material impurity content rising; 2. in the traditional method, the temperature of the powdery raw material before treatment is normal temperature, and the raw material needs to absorb heat in a radio frequency plasma torch again, so that the efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a device which can be used for processing a raw material rod, is convenient for energy conservation, improves the production quality, efficiency and powder purity of the raw material rod, and is convenient for reducing the preparation of a micro-nano powder material by using radio frequency plasma on the raw material rod.
The technical scheme of the invention is as follows: the utility model provides a device of micro-nano powder material of radio frequency plasma preparation, vacuum melting chamber, atomizer chamber and powder collecting system, the atomizer chamber upper end is equipped with vacuum melting chamber, and its lower extreme passes through pipe connection powder collecting system, and its bottom is equipped with first album powder ware, and the top is equipped with plasma atomizing device in the atomizer chamber, be equipped with the processingequipment who is used for melting raw materials stick in the vacuum melting chamber.
The scheme has the advantages that: the processing procedure of the raw materials is effectively solved, the raw material rods can be directly processed, the risk of impurity incorporation in the processing process of the raw material rods is reduced, the pollution of the raw materials is reduced, the defect that only powder raw materials can be processed is overcome, meanwhile, the raw material rods are directly processed after being melted, the raw materials are prevented from being greatly heated again, the energy loss is effectively reduced, and the raw materials are further excited, gasified and dissociated in a plasma torch and cooled, nucleated and condensed into micro-nano powder in a reaction chamber; meanwhile, the processing efficiency and quality of the plasma torch on the raw materials are improved, and the batch production is facilitated.
Further, the processing device comprises a raw material fixing piece, a raw material rod, an induction coil and an electrode, wherein the raw material fixing piece is provided with the top of the inner side of the vacuum melting chamber, the raw material rod is installed on the raw material fixing piece, one end of the induction coil penetrates through the vacuum melting chamber and is electrically connected with the electrode outside the vacuum melting chamber, the other end of the induction coil is sleeved on the raw material rod, and the raw material rod is heated to be melted after the induction coil is electrified.
Preferably, add the former material stick mount pad raw and other materials mounting of man-hour, raw and other materials stick can reciprocate relatively induction coil, is convenient for to make progress and progressively melt from the lower extreme to former material stick, prevents to melt in the middle of the former material stick and makes it drop, causes the melt after melting to be blocked up, can't get into the atomizer chamber, the improvement of the machining efficiency of being convenient for.
Furthermore, the induction coil is a horn-shaped coil with an upward opening, and the diameter of the lower end of the horn-shaped coil is larger than that of the raw material rod. The horn coil upper end opening is big, can preheat earlier the upper end of raw material stick, and raw material stick and induction coil are higher more closely the temperature, are convenient for once melt raw material stick from the tip, prevent that bold raw and other materials from dropping, make raw and other materials stick can obtain abundant melting.
Furthermore, the raw material fixing piece is provided with a telescopic piece, and the telescopic piece moves up and down under the driving of the driving device. During the use, former material mounting receives drive arrangement's drive, will install the raw materials stick slowly decline on it, makes the tip of raw materials stick flush with induction coil's lower extreme opening, what make raw materials stick can be abundant melts, makes the lower extreme drippage of the molten liquid following raw materials stick after melting simultaneously, prevents that the molten liquid from drippage on induction coil, is convenient for improve induction coil to raw materials stick's machining efficiency.
Further, processingequipment includes stopper rod and smelting furnace, and the smelting furnace is located the inboard lower extreme of vacuum melting chamber, and the smelting furnace bottom is equipped with the melt small opening, is equipped with the stopper rod in the melt small opening for open or close the downflow of melt, the smelting furnace is intermediate frequency smelting furnace or resistance heating smelting furnace.
Preferably, the smelting furnace adopts intermediate frequency smelting furnace, is convenient for improve machining efficiency and the effect to raw and other materials stick, can reduce the pollution risk to raw and other materials simultaneously.
Furthermore, the processing device comprises a magnetic suspension induction smelting furnace, the magnetic suspension induction smelting furnace is arranged at the lower end of the inner side of the vacuum smelting chamber, a raw material rod is placed in the magnetic suspension induction smelting furnace, and the molten raw material enters the atomizing chamber through a leakage hole at the lower end of the magnetic suspension induction smelting furnace.
Further, the processing device comprises an intermediate frequency smelting furnace and an intermediate heat-preserving container, the intermediate frequency smelting furnace is arranged in the vacuum smelting chamber, the intermediate heat-preserving container is arranged in the middle of the bottom of the vacuum smelting chamber, a molten steel stream beam is arranged at the lower end of the intermediate heat-preserving container, the molten steel after melting can fall into the atomizing chamber from the bottom of the intermediate heat-preserving container, the intermediate frequency smelting furnace is used for melting raw steel materials, the melting efficiency and the melting effect are convenient to improve, and the molten steel after melting is poured into the intermediate heat-preserving container to play roles in storing the molten steel and preserving the heat.
Preferably, the periphery of the middle heat-insulating ladle can be additionally provided with a heat-insulating and heating device, so that the temperature of the molten steel in the middle heat-insulating ladle is conveniently ensured, and the influence of the temperature reduction on the fluidity of the molten steel is prevented.
Further, the plasma atomization device comprises a radio frequency plasma generator, a plasma torch and a radio frequency plasma gas source, wherein the radio frequency plasma generator is arranged at the top of the inner side of the atomization chamber, the plasma torch is arranged in the radio frequency plasma generator, the radio frequency plasma generator is connected with the radio frequency plasma gas source, and the radio frequency plasma gas source is communicated with an external high-pressure gas source outside the atomization chamber.
Furthermore, the powder collecting system comprises a cyclone type powder collecting device, a pulse bag-type dust collector and a fan, wherein the cyclone type powder collecting device is connected with the atomizing chamber through a conveying pipeline, the top of the cyclone type powder collecting device is connected with the pulse bag-type dust collector through a pipeline, and the pulse bag-type dust collector is connected with the fan through an air pipe.
Furthermore, the lower end of the cyclone-type powder collecting device is connected with a second powder collector, and the lower end of the pulse bag-type dust collector is connected with a third powder collector.
Furthermore, a cooling device is arranged at the lower end of the atomizing chamber. Preferably, the cooling device adopts water cooling or air cooling, and the atomized raw materials enter the collecting system after being fully cooled, so that the collecting efficiency is improved, the damage to equipment is reduced, and the maintenance cost is effectively reduced.
The invention has the following characteristics:
the scheme directly sends the smelted molten metal flow beam into the radio frequency plasma torch, thereby saving the working procedure, the cost and the loss, and reducing the probability of raw material pollution; raw materials after the smelting treatment have high temperature, are closer to the boiling point of the raw materials, are more beneficial to excitation, gasification and dissociation in a plasma torch, are cooled in a reaction chamber to form nucleation and condensation into micro-nano powder, effectively improve the processing efficiency and quality, facilitate the loss of energy sources, and effectively improve the purity of the powder.
The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic structural view of the vacuum melting chamber in FIG. 1;
FIG. 3 is another schematic structural view of the vacuum melting chamber;
FIG. 4 is a schematic view of yet another configuration of a vacuum melting chamber;
1-radio frequency plasma generator, 2-plasma torch, 3-vacuum smelting chamber, 4-stopper rod, 5-smelting furnace, 6-molten steel stream, 7-radio frequency plasma gas source, 8-atomizing chamber, 9-first powder collector, 10-second powder collector, 11-cyclone powder collecting device, 12-pipeline, 13-pulse bag dust collector, 14-third powder collector, 15-fan, 16-induction coil, 17-raw material rod, 18-raw material fixing piece, 19-electrode, 20-magnetic suspension induction smelting furnace, 21-feeding door, 22-observation window, 23-intermediate frequency smelting furnace and 24-intermediate heat-preservation bag.
Detailed Description
As shown in the attached drawings: the utility model provides a device of micro-nano powder material of radio frequency plasma preparation, vacuum melting chamber 3, atomizer chamber 8 and powder collecting system, 8 upper ends of atomizer chamber are equipped with vacuum melting chamber 3, and its lower extreme passes through pipeline 12 and connects powder collecting system, and its bottom is equipped with first album powder ware 9, and the top is equipped with plasma atomizing device in the atomizer chamber 8, is equipped with the processingequipment who is used for melting raw materials stick 17 in the vacuum melting chamber 3. The top of the vacuum melting chamber 3 is provided with a feeding door 21 for adding the raw material rod 17, the side wall of the vacuum melting chamber is provided with an observation window 22, and the vacuum melting chamber is used for observing the melting condition of the raw material rod in the processing process, so that the processing temperature and other parameters can be conveniently adjusted.
The scheme effectively solves the processing procedure of raw materials, can directly process the raw material rod 17, simultaneously reduces the risk of impurity incorporation in the processing process of the raw material rod 17, reduces the pollution of the raw materials, breaks through the defect that only powder raw materials can be processed, simultaneously directly processes the raw material rod 17 after being melted, avoids large temperature rise of the raw materials again, effectively reduces the energy loss, and further excites, gasifies and dissociates the raw materials in the plasma torch 2, and the raw materials are cooled, nucleated and condensed into micro-nano powder in a reaction chamber; meanwhile, the processing efficiency and quality of the plasma torch 2 to raw materials are improved, and the batch production is facilitated.
In this embodiment, processingequipment includes stopper rod 4 and smelting furnace 5, and the inboard lower extreme of vacuum melting chamber 3 is located to smelting furnace 5, and smelting furnace 5 bottom is equipped with the melt small opening, is equipped with stopper rod 4 in the melt small opening for open or close the downflow of melt, smelting furnace 5 are intermediate frequency smelting furnace or resistance heating smelting furnace.
Preferably, the smelting furnace 5 adopts a medium frequency smelting furnace, which is convenient for improving the processing efficiency and effect of the raw material rods 17 and simultaneously can reduce the pollution risk to the raw materials.
The processing device effectively simplifies the melting part of the traditional equipment, and reduces the shortage that partial raw materials can be remained in the melting furnace 5 due to the fact that the molten liquid needs to be poured into the melting furnace 5 or the crucible in a pouring mode in the conventional processing; in addition, the process of pouring molten steel is not needed, the molten steel directly leaks downwards to the central position of the radio frequency plasma torch 2, and the temperature of the molten steel flow beam 6 is reduced less, so that the atomization effect is improved and the energy loss is reduced; the smelting part of the equipment is simplified, and the equipment investment cost is saved.
During the use, 5 bottom small opening blocks up of smelting furnace through special stopper rod 4, treats that raw and other materials smelt after suitable temperature, mentions stopper rod 4, and high temperature molten metal stream has passed through the smelting furnace 5 bottom fretwork and has leaked down, forms even molten steel stream 6, and plasma torch 2 carries out atomizing processing to molten steel stream 6, collects the powder through powder collection system after the processing is accomplished.
As shown in fig. 2, in another embodiment, the processing device includes a raw material fixing member 18, a raw material rod 17, an induction coil 16 and an electrode 19, the raw material fixing member 18 is provided with the top of the inner side of the vacuum melting chamber 3, the raw material fixing member 18 is provided with the raw material rod 17, one end of the induction coil 16 is arranged on the vacuum melting chamber 3 in a penetrating manner and is electrically connected with the electrode 19 outside the vacuum melting chamber 3, the other end of the induction coil is sleeved on the raw material rod 17, and the induction coil 16 heats the raw material rod 17 to be melted after being electrified.
Preferably, when processing, the raw material rod 17 is provided with the raw material fixing part 18, the raw material rod 17 can move up and down relative to the induction coil 16, so that the raw material rod 17 is conveniently and gradually melted from the lower end upwards, the raw material rod 17 is prevented from being melted down in the middle, the melted liquid is blocked and cannot enter the atomizing chamber 8, and the processing efficiency is improved.
The induction coil 16 is a flared coil which is opened upward, and the diameter of the lower end of the flared coil is larger than that of the raw material rod 17. The horn coil upper end opening is big, can preheat earlier raw and other materials stick 17's upper end, and raw and other materials stick 17 and induction coil 16 are higher with getting close to the temperature, are convenient for once melt raw and other materials stick 17 from the tip, prevent that the bold raw and other materials from dropping, make raw and other materials stick 17 can obtain abundant melting.
The flame of the plasma torch 2 of this embodiment converges into the high temperature region, makes molten steel stream 6 fully contact the flame interweaving region of high temperature region, makes it obtain abundant being heated, is convenient for the improvement of atomization effect and the improvement of machining efficiency.
The raw material fixing member 18 is provided with an extensible member which moves up and down by the driving of the driving device. When the device is used, the raw material fixing piece 18 is driven by the driving device, the raw material rod 17 mounted on the raw material fixing piece slowly descends, the end part of the raw material rod 17 is flush with the lower end opening of the induction coil 16, the raw material rod 17 can be fully melted, melted liquid can drop along the lower end of the raw material rod 17, the melted liquid is prevented from dropping on the induction coil 16, and the processing efficiency of the induction coil 16 on the raw material rod 17 is improved conveniently.
When the processing device is used, the raw material rod 17 is not contacted with other media in the smelting process, so that the raw material is not further polluted, and the high purity is ensured; the effectual atomizing effect and the quality of processing of having improved, atomizing accomplish after the back through the powder collection system to the powder collect can, compare traditional production mode and effectively improved raw and other materials purity 5% at least.
As shown in fig. 3, in another embodiment, the processing device comprises a magnetic levitation induction melting furnace 20, the magnetic levitation induction melting furnace 20 is arranged at the inner lower end of the vacuum melting chamber 3, the magnetic levitation induction melting furnace 20 is provided with a raw material rod 17, and the melted raw material enters the atomizing chamber 8 through a leak hole at the lower end of the magnetic levitation induction melting furnace 20.
The smelting process is pollution-free, and the high purity is ensured; the high-frequency induction coil 16 is used for suspension smelting, so that the smelting time is short and the efficiency is high; and the structure is simple. When in use, the material is placed in the opened magnetic suspension smelting furnace 5, and various parameters, such as temperature, time and the like, of the smelting furnace 5 are controlled, so that the material is suspended in the air while being smelted. After smelting, controlling the material to fall to the bottom of the smelting furnace 5, forming uniform molten steel flow beams 6 through bottom leakage holes, processing the molten steel flow beams 6 through the plasma torch 2, and collecting the processed molten steel flow beams through a powder collecting system.
As shown in fig. 4, in another embodiment, the processing apparatus includes an intermediate frequency smelting furnace 23 and an intermediate thermal insulation package 24, the intermediate frequency smelting furnace 23 is disposed in the vacuum smelting chamber 3, the intermediate thermal insulation package 24 is disposed in the middle of the bottom of the vacuum smelting chamber 3, a molten steel stream 6 is disposed at the lower end of the intermediate thermal insulation package 24, so that the molten steel after melting can fall from the bottom of the intermediate thermal insulation package 24 to the atomizing chamber 8, the intermediate frequency smelting furnace 23 is used for melting the steel raw material, so as to improve the melting efficiency and effect, the molten steel after melting is poured into the intermediate thermal insulation package 24, so as to achieve the effects of storing the molten steel and preserving heat, preferably, a heat preservation and heating apparatus may be further added to the periphery of the intermediate thermal insulation package 24, so as to ensure the temperature of the molten steel in the intermediate.
The plasma atomization device comprises a radio frequency plasma generator 1, a plasma torch 2 and a radio frequency plasma gas source 7, wherein the radio frequency plasma generator 1 is arranged at the top of the inner side of an atomization chamber 8, the plasma torch 2 is arranged in the radio frequency plasma generator 1, the radio frequency plasma generator 1 is connected with the radio frequency plasma gas source 7, and the radio frequency plasma gas source 7 is communicated with an external high-pressure gas source of the atomization chamber 8.
The powder collecting system comprises a cyclone type powder collecting device 11, a pulse bag-type dust collector 13 and a fan 15, wherein the cyclone type powder collecting device 11 is connected with the atomizing chamber 8 through a conveying pipeline 12, the top of the cyclone type powder collecting device 11 is connected with the pulse bag-type dust collector 13 through a pipeline 12, and the pulse bag-type dust collector 13 is connected with the fan 15 through an air pipe.
The lower end of the cyclone-type powder collecting device 11 is connected with a second powder collector 10, and the lower end of the pulse bag-type dust collector 13 is connected with a third powder collector 14.
The lower end of the atomizing chamber 8 is provided with a cooling device. Preferably, the cooling device adopts water cooling or air cooling, and the atomized raw materials enter the collecting system after being fully cooled, so that the collecting efficiency is improved, the damage to equipment is reduced, and the maintenance cost is effectively reduced.
The working principle of the invention is as follows: the raw materials are placed in a smelting furnace 5 for smelting, then the molten metal is conveyed to an atomizing chamber 8, preferably, the molten liquid after being molten can be poured into a middle heat-preserving container preheated in advance, uniform molten steel flow beams 6 are formed through a leakage hole at the bottom of the middle heat-preserving container, the molten steel flow beams 6 enter the center of a plasma torch 2 generated by a radio frequency plasma generator 1, under the impact and ultrahigh temperature treatment of plasma, fine and uniform molten steel flow beams 6 are directly bombarded and simultaneously form micro-nano liquid drops along with the sublimation process, the liquid drops pass through the atomizing chamber 8, are gradually cooled and finally solidified into powder materials, and the powder is collected through a powder collecting system under the suction effect of a Roots blower 15 and is respectively stored in each powder collector.
The preferred embodiments of the invention have been described in detail above, but it is apparent that the invention is not limited to the above embodiments only. Within the scope of the inventive idea, many equivalent variations can be made to the inventive solution, all falling within the scope of protection of the invention. In addition, it should be noted that the respective technical features described in the above-described embodiments may be separately and independently combined as long as they are within the technical concept of the invention.
Claims (10)
1. The utility model provides a device of micro-nano powder material of radio frequency plasma preparation, vacuum melting chamber, atomizer chamber and powder collecting system, the atomizer chamber upper end is equipped with vacuum melting chamber, and its lower extreme passes through pipe connection powder collecting system, and its bottom is equipped with first album powder ware, and the top is equipped with plasma atomizing device, its characterized in that in the atomizer chamber: and a processing device for melting the raw material rod is arranged in the vacuum melting chamber.
2. The device for preparing the micro-nano powder material by the radio frequency plasma according to claim 1, characterized in that: the processing device comprises a raw material fixing piece, a raw material rod, an induction coil and an electrode, wherein the raw material fixing piece is provided with the top of the inner side of a vacuum melting chamber, the raw material rod is installed on the raw material fixing piece, one end of the induction coil penetrates through the vacuum melting chamber and is electrically connected with the electrode outside the vacuum melting chamber, the other end of the induction coil is sleeved on the raw material rod, and the induction coil heats the raw material rod to be melted after being electrified.
3. The apparatus for preparing micro-nano powder material by radio frequency plasma according to claim 2, wherein: the induction coil is a horn-shaped coil with an upward opening, and the diameter of the lower end of the horn-shaped coil is larger than that of the raw material rod.
4. The device for preparing the micro-nano powder material by the radio frequency plasma according to claim 3, characterized in that: the raw material fixing piece is provided with a telescopic piece, and the telescopic piece moves up and down under the driving of the driving device.
5. The device for preparing the micro-nano powder material by the radio frequency plasma according to claim 1, characterized in that: the processing device comprises a stopper rod and a smelting furnace, the smelting furnace is arranged at the lower end of the inner side of the vacuum smelting chamber, a molten liquid leak hole is formed in the bottom of the smelting furnace, the stopper rod is arranged in the molten liquid leak hole and used for opening or closing the downward flow of molten liquid, and the smelting furnace is an intermediate frequency smelting furnace or a resistance heating smelting furnace.
6. The device for preparing the micro-nano powder material by the radio frequency plasma according to claim 1, characterized in that: the processing device comprises a magnetic suspension induction smelting furnace, the magnetic suspension induction smelting furnace is arranged at the lower end of the inner side of the vacuum smelting chamber, a raw material rod is placed in the magnetic suspension induction smelting furnace, and the molten raw material enters the atomizing chamber through a leak hole at the lower end of the magnetic suspension induction smelting furnace.
7. The device for preparing the micro-nano powder material by the radio frequency plasma according to claim 1, characterized in that: the processing device comprises a medium-frequency smelting furnace and a middle heat-preserving container, the medium-frequency smelting furnace is arranged in a vacuum smelting chamber, the middle heat-preserving container is arranged in the middle of the bottom of the vacuum smelting chamber, and molten steel flow beams are arranged at the lower end of the middle heat-preserving container, so that molten steel falls into an atomizing chamber from the bottom of the middle heat-preserving container.
8. The apparatus for preparing micro-nano powder material by radio frequency plasma according to any one of claims 1 to 7, wherein: the plasma atomization device comprises a radio frequency plasma generator, a plasma torch and a radio frequency plasma gas source, wherein the radio frequency plasma generator is arranged at the top of the inner side of the atomization chamber, the plasma torch is arranged in the radio frequency plasma generator, the radio frequency plasma generator is connected with the radio frequency plasma gas source, and the radio frequency plasma gas source is communicated with an external high-pressure gas source of the atomization chamber.
9. The apparatus for preparing micro-nano powder material by radio frequency plasma according to any one of claims 1 to 7, wherein: the powder collecting system comprises a cyclone type powder collecting device, a pulse bag-type dust collector and a fan, wherein the cyclone type powder collecting device is connected with the atomizing chamber through a conveying pipeline, the top of the cyclone type powder collecting device is connected with the pulse bag-type dust collector through a pipeline, and the pulse bag-type dust collector is connected with the fan through an air pipe.
10. The apparatus for preparing micro-nano powder material by radio frequency plasma according to any one of claims 1 to 7, wherein: the lower end of the cyclone type powder collecting device is connected with a second powder collector, the lower end of the pulse bag-type dust collector is connected with a third powder collector, and the lower end of the atomizing chamber is provided with a cooling device.
Priority Applications (1)
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| TWI798989B (en) * | 2020-12-17 | 2023-04-11 | 大陸商江蘇博遷新材料股份有限公司 | Device for preparing ultrafine powder by plasma arc atomization method |
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