CN108031855A - A kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system - Google Patents
A kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system Download PDFInfo
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- CN108031855A CN108031855A CN201810046290.1A CN201810046290A CN108031855A CN 108031855 A CN108031855 A CN 108031855A CN 201810046290 A CN201810046290 A CN 201810046290A CN 108031855 A CN108031855 A CN 108031855A
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- radio frequency
- frequency induction
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The present invention relates to a kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, including high-frequency induction heating apparatus, radio frequency induction plasma apparatus, vacuum extractor, atomization collection device, separation dust-extraction unit and silk material conveying device.Present invention design is reasonable, it is easy to operate, the technology being combined using high-frequency induction heating with radio frequency plasma melting and aerosolization, whole heating, fusing, aerosolization process is vacuumized by system to be re-filled with indifferent gas and is protected, it is pollution-free, nothing is mingled with, silk material is preheated by high-frequency induction heating apparatus to be combined with radio frequency plasma device fusing silk material, improve heat absorption rate in preheating and fusion process, improve liquid stream or the degree of superheat of drop, so that high sphericity can be obtained after aerosolization, Oxygen potential, smaller particle size, high quality spherical powder without hollow ball, high pressure atomizing nozzle is used in atomization process, add the output capacity of the metal dust of unit interval.
Description
Technical field
The present invention relates to powder metallurgical technology, and in particular to a kind of sensing heating and radio frequency plasma combined atomizing system
Powder system.
Background technology
With flourishing for the technologies such as increasing material manufacturing (3D printing), injection moulding, thermal spraying, the spherical infusibility of high quality
Metal dust and active metal powder are all important source material necessary to these fields, spherical infusibility and active metal powder production
Count for much in whole product manufacturing process, closed for the refractory metal of the higher melts such as tungsten, molybdenum, tantalum, niobium, and titanium and titanium
Golden etc. both active and dystectic metal or alloy, it is difficult to obtain the spherical of high quality with conventional melting and aerosolization method
Powder.
At present, the technology of the spherical infusibility of the high quality that is produced on a large scale and active metal powder mainly has plasma electric rotating
Pole method (PREP), induction melting inert gas atomizer technology (PIGA, EIGA), plasma torch atomization (PA), radio frequency etc. from
Bulbec method (RF) etc..
Plasma rotating electrode process (PREP) melts high-speed rotating metal bar material front end with high-temperature plasma line, relies on
The high-speed rotating centrifugal force of bar disperses to throw away molten melt drop, and molten melt drop relies on surface tension polycondensation glomeration again, and cold
Cure during solidifying, due to the plasma gun power limited applied at present, and the raw material used is mostly the gold of 50~80mm of diameter
Belong to bar, so existing plasma rotating electrode powder-making technique can carry out the rotation of titanium alloy, nickel-base alloy and cobalt-base alloys
Powder by atomization, but rotary-atomizing powder can not be carried out to more dystectic tungsten, molybdenum, tantalum, niobium Base Metal and alloy.In addition, wait from
The rotating speed of metal bar material can not provide the metal drop of higher generally within 20000r/min in sub- rotation electrode powder-making technique
The centrifugal force of aerosol dispersion, therefore, the spherical powder granularity which prepares are generally relatively thick, big absolutely such as titanium or titanium alloy powder
For most granularities between 100~250 μm, the powder yield of less than 50 μm particle diameters is extremely low.
For inert gas atomizer technology (PIGA), since extreme is presented in some rare metals during high melt
Activity, so fusion process is mostly in a vacuum or inert atmosphere, and using the induction melting mode of cold-crucible, or using gold
Belong to bar and the direct induction melting (EIGA) of silk material；At present using induction melting mode powder mostly as titanium or titanium alloy,
The relatively not high metal of the fusing points such as nickel-base alloy, can not just carry out for more dystectic tungsten, molybdenum, tantalum, niobium Base Metal and alloy
Melt and powder processed.In addition occur electrode not during using induction melting aerosolization technology smelting metal bar or silk material
It is completely melt and falls into diversion pipe, causes to block, thus the continuous-stable of holding liquid stream is a technological difficulties of EIGA.Separately
Outside, the drop after induction melting departs from high-temperature region and is atomized immediately, thus the degree of superheat of the molten drop after general fusing compared with
It is low, there is no enough temperature and times to ensure that drop shrinks balling-up under surface tension effects during temperature reconstruction,
Therefore the sphericity of powder is bad, can also produce hollow ball.
Plasma torch atomization (PA) is using Canadian AP＆C companies as representative.The technology is using silk material as raw material, with direct current
The high temperature plasma jet of plasmatorch is heat source, under an argon atmosphere, using the high temperature of plasmatorch, high speed characteristics, with more
Silk material is melted by plasmatorch and is atomized into small drop, is then cooled to spherical powder.This method can produce sphericity height
And the high quality spherical powder that particle diameter is small, but the technology causes powder due to being subject to plasmatorch and silk material heat transfer efficiency etc. to limit
Last yield is relatively low.
Radio frequency plasma (RF) is using Canadian TEKNA companies as representative.The technology is using radio frequency plasma torch to raw material
Heated, there is that the incomparable plasma temperature of other methods is high, electrodeless pollution；Using metal dust as original
Material, after plasma high temperature melting, drop shrinks balling-up under surface tension effects and then solidifies, and can obtain sphericity
Good spherical powder.Shortcoming is that powder purity, granularity are limited in itself by raw material, and powder output is relatively low.
The content of the invention
It is an object of the invention to provide a kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, to solve
Existing dystectic refractory metal, and titanium or titanium alloy etc. is both active and dystectic metal or alloy is difficult to obtain high quality
The problem of spherical powder.
To achieve the above object, the technical scheme is that：
A kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, including high-frequency induction heating apparatus, radio frequency sense
Answer plasma apparatus, vacuum extractor, atomization collection device, separation dust-extraction unit and silk material conveying device, the high-frequency induction
The insulator seal tubulature of heating unit and plasma lamp torch the being integrated molding structure of the radio frequency induction plasma apparatus, use
Seal Design；
Further, the atomization collection device includes atomizer, atomization reative cell and atomization reative cell rewinding tank；
Further, the vacuum extractor includes level-one high vacuum oil diffuse pump series connection level-one mechanical pump；
Further, the separation dust-extraction unit includes cyclone separator, deduster, separator rewinding tank and deduster receipts
Collect tank；
Further, the silk material conveying device includes wire dispenser, straightener and wire feeder, the silk material conveying device
Power is 1~3KW, and frequency control, wire feed rate is 1~20m/min；
Further, the high-frequency induction heating apparatus includes high-frequency induction heating power, radio-frequency induction coil, insulator seal
Tubulature and encapsulating structure, the power of the high-frequency induction heating power are 15~100KW, and frequency of oscillation is 50~500KHz, institute
The radio-frequency induction coil stated is 4~10 circles, and a diameter of 6~20mm, usesHollow copper tubing makes, the high frequency
The insulator seal tubulature is inserted among induction coil, the insulator seal tubulature is made using silica glass material, the envelope
The high-frequency induction heating apparatus and silk material conveying device are connected and sealed assembling structure；
Further, the radio frequency induction plasma apparatus include radio frequency induction heating power supply, radio frequency induction coil, etc. from
Sub- lamp torch and plasma lamp torch fixture, the power of the radio frequency induction heating power supply are 50~200KW, frequency of oscillation for 3~
300MHz, the radio frequency induction coil are 4~6 circles, and a diameter of 60~90mm, usesHollow copper tubing makes,
The plasma lamp torch uses three layers of water-cooling structure, passes through the plasma lamp torch fixture and the high-frequency induction heating apparatus phase
Even；
Further, whole system is evacuated to 10 by the vacuum extractor-1~10-3Pa, system leak rate ＜
0.005PaL/s, is re-filled with helium or argon gas establishes protective atmosphere, and system pressure is controlled in -50KPa~+50KPa；
Further, the plasma lamp torch establishes stable plasmatorch, the helium or argon using helium or argon gas
The primary air amount of gas is 10~100L/min, and side throughput is 20~300L/min, and the purity of the helium or argon gas is not less than
99.995%；
Further, the atomizer is high pressure atomizing nozzle, the atomization gas of the atomizer be argon gas or
Helium, selected atomizing pressure are 5~10MPa, and atomization gas flow is 2~20m3/min。
The invention has the advantages that：
1st, a kind of sensing heating of the present invention and radio frequency plasma combined atomizing pulverized coal preparation system including high-frequency induction heating apparatus,
Radio frequency induction plasma apparatus, vacuum extractor, atomization collection device, separation dust-extraction unit and silk material conveying device, system are set
Meter is reasonable, easy to operate, the technology being combined using high-frequency induction heating with radio frequency plasma melting and aerosolization, whole to add
Heat, fusing, aerosolization process vacuumize by system and are re-filled with indifferent gas and are protected, no gaseous contamination, electrodeless pollution, nothing
It is mingled with.
2nd, the present invention melts silk material with radio frequency plasma device by high-frequency induction heating apparatus preheated metallic silk material and mutually ties
Close, improve heat absorption rate in preheating and fusion process, by the power and vibration frequency that adjust radio frequency induction heating unit
Rate, improves liquid stream or the degree of superheat of drop so that high sphericity, Oxygen potential, smaller particle size, nothing can be obtained after aerosolization
The high quality spherical powder of hollow ball, will not using high pressure atomizing nozzle and inert atomizing gas, atomization process in atomization process
Impurity is produced, adds the output capacity of the metal dust of unit interval.
Brief description of the drawings
Fig. 1 is a kind of sensing heating of the present invention and the system diagram of radio frequency plasma combined atomizing pulverized coal preparation system.
Wherein, 1. high-frequency induction heating apparatus, 2. radio frequency induction plasma apparatus, 3. vacuum extractors, 4. atomizations are collected
Device, 5. separation dust-extraction units, 6. silk material conveying devices, 7. atomizers, 8. atomization reative cells, 9. atomization reative cell rewindings
Tank, 10. high vacuum oil diffuse pumps, 11. mechanical pumps, 12. cyclone separators, 13. dedusters, 14. separator rewinding tanks, 15, put
Line device, 16, straightener, 17, wire feeder, 18. high-frequency induction heating powers, 19. radio-frequency induction coils, 20. insulator seal tubulatures,
21. encapsulating structure, 22. radio frequency induction heating power supplies, 23. radio frequency induction coils, 24. plasma lamp torches, 25. plasma lamp torch cards
Tool, 26. deduster collecting tanks.
Embodiment
Following embodiments are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, including high-frequency induction heating fill
Put 1, radio frequency induction plasma apparatus 2, vacuum extractor 3, atomization collection device 4, separation dust-extraction unit 5 and silk material conveying device
6, the high-frequency induction heating apparatus 1 includes high-frequency induction heating power 18, radio-frequency induction coil 19, insulator seal tubulature 20 and envelope
Assembling structure 21, the power of the high-frequency induction heating power 18 are 30KW, and frequency of oscillation is 100~300KHz, the high frequency sense
It is 6 circles to answer coil 19, and a diameter of 10mm, usesHollow copper tubing makes, insertion institute among the radio-frequency induction coil 19
State insulator seal tubulature 20, the insulator seal tubulature 20 is made using silica glass material, and the encapsulating structure 21 is by high frequency
Heating induction device 1 is connected and sealed with silk material conveying device 6, and the radio frequency induction plasma apparatus 2 includes radio frequency induction
Heating power supply 22, radio frequency induction coil 23, plasma lamp torch 24 and plasma lamp torch fixture 25, the radio frequency induction heating power supply
22 power is 100KW, and frequency of oscillation 3MHz, the radio frequency induction coil 23 is 4 circles, and a diameter of 80mm, usesHollow copper tubing makes, and the plasma lamp torch 24 uses three layers of water-cooling structure, passes through the plasma lamp torch fixture
25 are connected with the high-frequency induction heating apparatus 1, and the plasma lamp torch 24 establishes stable plasmatorch using helium, described
The primary air amount of helium is 10~50L/min, and side throughput is 20~100L/min, and the purity of the helium is not less than
99.995%, the plasma of the insulator seal tubulature 20 of the high-frequency induction heating apparatus 1 and the radio frequency induction plasma apparatus 2
24 being integrated molding structure of lamp torch, using Seal Design, the vacuum extractor 3 is gone here and there including level-one high vacuum oil diffuse pump 10
Join level-one mechanical pump 11, the pressure of whole system is vacuumized 10-1~10-3Pa, system leak rate ＜ 0.005PaL/s, then
It is filled with helium and establishes protective atmosphere, system pressure control includes atomization and spray in -20KPa~+20KPa, the atomization collection device 4
Mouth 7, atomization reative cell 8 and atomization reative cell rewinding tank 9, the atomizer 7 are high pressure atomizing nozzle, the atomizer 7
Atomization gas is helium, and selected atomizing pressure is 5~8MPa, and atomization gas flow is 2~10m3/ min, the separation remove
Dirt device 5 includes cyclone separator 12, deduster 13, separator rewinding tank 14 and deduster collecting tank 26, the silk material conveying
Device 6 includes wire dispenser 15, straightener 16 and wire feeder 17, and the power of the silk material conveying device 6 is 1~3KW, becomes frequency modulation
Speed, wire feed rate are 2~6m/min.
A kind of sensing heating and the milling method of radio frequency plasma combined atomizing pulverized coal preparation system, by vacuum extractor 3 first
Indifferent gas is re-filled with after whole system is vacuumized, the silk material prepared is transported to by high-frequency induction by silk material conveying device 6
Heating unit 1 is preheated, and the silk material after preheating carries out melting by radio frequency plasma device 2, and the drop after melting is being atomized
Fine droplets are atomized into collection device 4 and are cooled to spherical powder, are separated and collected through separating dust-extraction unit 5, and by screening
Obtain required metal dust.
Embodiment 2
As shown in Figure 1, a kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, including high-frequency induction heating fill
Put 1, radio frequency induction plasma apparatus 2, vacuum extractor 3, atomization collection device 4, separation dust-extraction unit 5 and silk material conveying device
6, the high-frequency induction heating apparatus 1 includes high-frequency induction heating power 18, radio-frequency induction coil 19, insulator seal tubulature 20 and envelope
Assembling structure 21, the power of the high-frequency induction heating power 18 are 60KW, and frequency of oscillation is 200~400KHz, the high frequency
Induction coil 19 is 8 circles, and a diameter of 12mm, usesHollow copper tubing makes, insertion among the radio-frequency induction coil 19
The insulator seal tubulature 20, the insulator seal tubulature 20 are made using silica glass material, and the encapsulating structure 21 is by height
Frequency heating induction device 1 is connected and sealed with silk material conveying device 6, and the radio frequency induction plasma apparatus 2 includes radio frequency sense
Answer heating power supply 22, radio frequency induction coil 23, plasma lamp torch 24 and plasma lamp torch fixture 25, the radio frequency induction heating electricity
The power in source 22 is 200KW, and frequency of oscillation 50MHz, the radio frequency induction coil 23 is 5 circles, and a diameter of 90mm, usesHollow copper tubing makes, and the plasma lamp torch 24 uses three layers of water-cooling structure, passes through the plasma lamp torch fixture
25 are connected with the high-frequency induction heating apparatus 1, and the plasma lamp torch 24 establishes stable plasmatorch using argon gas, described
The primary air amount of argon gas is 30~80L/min, and side throughput is 50~200L/min, and the purity of argon is not less than
99.995%, the plasma of the insulator seal tubulature 20 of the high-frequency induction heating apparatus 1 and the radio frequency induction plasma apparatus 2
24 being integrated molding structure of lamp torch, using Seal Design, the vacuum extractor 3 is gone here and there including level-one high vacuum oil diffuse pump 10
Join level-one mechanical pump 11, the pressure of whole system is evacuated to 10 by the vacuum extractor 3-1~10-3Pa, system leak rate
＜ 0.005PaL/s, are re-filled with argon gas and establish protective atmosphere, system pressure control is received in -30KPa~+30KPa, the atomization
Acquisition means 4 include atomizer 7, atomization reative cell 8 and atomization reative cell rewinding tank 9, and the atomizer 7 sprays for high-pressure atomization
Mouth, the atomization gas of the atomizer 7 is argon gas, and selected atomizing pressure is 5~10MPa, atomization gas flow for 5~
15m3/ min, the separation dust-extraction unit 5 include cyclone separator 12, deduster 13, separator rewinding tank 14 and deduster and receive
Collect tank 26, the silk material conveying device 6 includes wire dispenser 15, straightener 16 and wire feeder 17, the work(of the silk material conveying device 6
Rate is 1~3Kw, and frequency control, wire feed rate is 3~5m/min.
A kind of sensing heating and the milling method of radio frequency plasma combined atomizing pulverized coal preparation system, by vacuum extractor 3 first
Indifferent gas is re-filled with after whole system is vacuumized, the silk material prepared is transported to by high-frequency induction by silk material conveying device 6
Heating unit 1 is preheated, and the silk material after preheating carries out melting by radio frequency plasma device 2, and the drop after melting is being atomized
Fine droplets are atomized into collection device 4 and are cooled to spherical powder, are separated and collected through separating dust-extraction unit 5, and by screening
Obtain required metal dust.
Embodiment 3
As shown in Figure 1, a kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, including high-frequency induction heating fill
Put 1, radio frequency induction plasma apparatus 2, vacuum extractor 3, atomization collection device 4, separation dust-extraction unit 5 and silk material conveying device
6, the high-frequency induction heating apparatus 1 includes high-frequency induction heating power 18, radio-frequency induction coil 19, insulator seal tubulature 20 and envelope
Assembling structure 21, the power of the high-frequency induction heating power 18 are 40Kw, and frequency of oscillation is 100~300KHz, the high frequency
Induction coil 19 is 8 circles, and a diameter of 10mm, usesHollow copper tubing makes, insertion among the radio-frequency induction coil 19
The insulator seal tubulature 20, the insulator seal tubulature 20 are made using silica glass material, and the encapsulating structure 21 is by height
Frequency heating induction device 1 is connected and sealed with silk material conveying device 6, and the radio frequency induction plasma apparatus 2 includes radio frequency sense
Answer heating power supply 22, radio frequency induction coil 23, plasma lamp torch 24 and plasma lamp torch fixture 25, the radio frequency induction heating electricity
The power in source 22 is 120Kw, and frequency of oscillation 20MHz, the radio frequency induction coil 23 is 5 circles, and a diameter of 75mm, usesHollow copper tubing makes, and the plasma lamp torch 24 uses three layers of water-cooling structure, passes through the plasma lamp torch fixture
25 are connected with the high-frequency induction heating apparatus 1, and the plasma lamp torch 24 establishes stable plasmatorch using helium, described
The primary air amount of helium is 10~60L/min, and side throughput is 20~100L/min, and the purity of the helium is not less than
99.995%, the plasma of the insulator seal tubulature 20 of the high-frequency induction heating apparatus 1 and the radio frequency induction plasma apparatus 2
24 being integrated molding structure of lamp torch, using Seal Design, the vacuum extractor 3 is gone here and there including level-one high vacuum oil diffuse pump 10
Join level-one mechanical pump 11, the pressure of whole system is evacuated to 10 by the vacuum extractor 3-1~10-3Pa, system leak rate
＜ 0.005PaL/s, and be filled with helium and establish protective atmosphere, system pressure control is received in -50KPa~+50KPa, the atomization
Acquisition means 4 include atomizer 7, atomization reative cell 8 and atomization reative cell rewinding tank 9, and the atomizer 7 sprays for high-pressure atomization
Mouth, the atomization gas of the atomizer 7 is helium, and selected atomizing pressure is 8~10MPa, atomization gas flow for 10~
20m3/ min, the separation dust-extraction unit 5 include cyclone separator 12, deduster 13, separator rewinding tank 14 and deduster and receive
Collect tank 26, the silk material conveying device 6 includes wire dispenser 15, straightener 16 and wire feeder 17, the work(of the silk material conveying device 6
Rate is 1~3Kw, and frequency control, wire feed rate is 5~8m/min.
A kind of sensing heating and the milling method of radio frequency plasma combined atomizing pulverized coal preparation system, by vacuum extractor 3 first
Indifferent gas is re-filled with after whole system is vacuumized, the silk material prepared is transported to by high-frequency induction by silk material conveying device 6
Heating unit 1 is preheated, and the silk material after preheating carries out melting by radio frequency plasma device 2, and the drop after melting is being atomized
Fine droplets are atomized into collection device 4 and are cooled to spherical powder, are separated and collected through separating dust-extraction unit 5, and by screening
Obtain required metal dust.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention.
Claims (10)
1. a kind of sensing heating and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：The sensing heating and radio frequency
Plasma combined atomizing pulverized coal preparation system includes high-frequency induction heating apparatus (1), radio frequency induction plasma apparatus (2), vacuum means
Put (3), atomization collection device (4), separation dust-extraction unit (5) and silk material conveying device (6), the high-frequency induction heating apparatus
(1) insulator seal tubulature (20) and the plasma lamp torch (24) of the radio frequency induction plasma apparatus (2) are integrated chemical conversion type knot
Structure, using Seal Design.
2. sensing heating according to claim 1 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Being atomized collection device (4) includes atomizer (7), atomization reative cell (8) and atomization reative cell rewinding tank (9).
3. sensing heating according to claim 1 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Vacuum extractor (3) includes level-one high vacuum oil diffuse pump (10) series connection level-one mechanical pump (11).
4. sensing heating according to claim 1 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Separation dust-extraction unit (5) includes cyclone separator (12), deduster (13), separator rewinding tank (14) and deduster collecting tank
(26)。
5. sensing heating according to claim 1 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Silk material conveying device (6) includes wire dispenser (15), straightener (16) and wire feeder (17), the work(of the silk material conveying device (6)
Rate is 1~3KW, and frequency control, wire feed rate is 1~20m/min.
6. sensing heating according to claim 1 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
High-frequency induction heating apparatus (1) include high-frequency induction heating power (18), radio-frequency induction coil (19), insulator seal tubulature (20) and
Encapsulating structure (21), the power of the high-frequency induction heating power (18) is 15~100Kw, and frequency of oscillation is 50~500KHz,
The radio-frequency induction coil (19) is 4~10 circles, and a diameter of 6~20mm, usesHollow copper tubing makes, institute
State and the insulator seal tubulature (20) is inserted among radio-frequency induction coil (19), the insulator seal tubulature (20) uses quartz glass material
Material is made, and the encapsulating structure (21) is sealed the high-frequency induction heating apparatus (1) and silk material conveying device (6)
Connection.
7. sensing heating according to claim 1 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Radio frequency induction plasma apparatus (2) includes radio frequency induction heating power supply (22), radio frequency induction coil (23), plasma lamp torch (24)
With plasma lamp torch fixture (25), the power of the radio frequency induction heating power supply (22) is 50~200KW, frequency of oscillation for 3~
300MHz, the radio frequency induction coil (23) are 4~6 circles, and a diameter of 60~90mm, usesHollow copper tubing
Make, the plasma lamp torch (24) uses three layers of water-cooling structure, passes through the plasma lamp torch fixture (25) and the high frequency
Induction heating apparatus (1) is connected.
8. sensing heating according to claim 3 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Whole system is evacuated to 10 by vacuum extractor (3)-1~10-3Pa, system leak rate ＜ 0.005PaL/s, is re-filled with helium
Gas or argon gas establish protective atmosphere, and system pressure is controlled in -50KPa~+50KPa.
9. sensing heating according to claim 7 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：It is described
Plasma lamp torch (24) establishes stable plasmatorch using argon gas or helium, the primary air amount of the helium or argon gas for 10~
100L/min, side throughput are 20~300L/min, and the helium or purity of argon are not less than 99.995%.
10. sensing heating according to claim 2 and radio frequency plasma combined atomizing pulverized coal preparation system, it is characterised in that：Institute
It is high pressure atomizing nozzle to state atomizer (7), and the atomization gas of the atomizer (7) is argon gas or helium, selected mist
Change pressure is 5~10MPa, and atomization gas flow is 2~20m3/min。
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| CN113042740A (en) * | 2021-02-07 | 2021-06-29 | 北京七弟科技有限公司 | Method for preparing high-melting-point metal or alloy spherical powder by adopting gas atomization |
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