CN105458277A - Device and method for producing high-purity metal powder through multi-head non-transferred arc plasma polymerization - Google Patents
Device and method for producing high-purity metal powder through multi-head non-transferred arc plasma polymerization Download PDFInfo
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- CN105458277A CN105458277A CN201510967413.1A CN201510967413A CN105458277A CN 105458277 A CN105458277 A CN 105458277A CN 201510967413 A CN201510967413 A CN 201510967413A CN 105458277 A CN105458277 A CN 105458277A
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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
- B22F9/12—Making metallic powder or suspensions thereof using physical processes starting from gaseous material
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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
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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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 invention relates to a device and a method for producing a high-purity metal powder through multi-head non-transferred arc plasma polymerization. The device is characterized in that: a feed pipe and more than two non-transferred arc plasma torches are arranged on a furnace cover of a vaporizing furnace; a discharge pipe orderly communicates with a collector, a gas-solid separator, an exhaust fan, a heat exchanger and the vaporizing furnace, and a vacuum pump is arranged on a communicating pipeline; the feed pipe extending out of the furnace cover is connected with a flow control valve and then communicates with an inner cavity of a storage barrel, and a vacuum pump is mounted on a pipeline or a component communicating with an inner cavity of a cooling pipe; the method comprises: vacuumizing an inner cavity of the vaporizing furnace by using the vacuum pump and then injecting an inert gas of 10-90KPa into the inner cavity, starting the non-transferred arc plasma torches and other devices, and then feeding materials from the feed pipe and collecting materials from the collector. The device and the method for producing the high-purity metal powder through multi-head non-transferred arc plasma polymerization have the advantage that the produced metal powder is high in purity, good in uniformity and accurate in alloy ratio, and thus conductive to subsequent production of various electronic slurries and welding colloidal materials.
Description
Technical field
The invention belongs to metal-powder device for making technical field, refer in particular to the device and method of a kind of bull plasma untransferable arc polymerization high purity micro-nano or alloy micro-nano metal-powder.
Background technology
Chinese patent CN102211197B discloses one " evaporation of metal device and prepare the method for ultra tiny metal dust with this device ", this device comprises crucible (1), plasma transferred arc torch (2), plasma transferred arc (3), graphite (4), additional power source and wire, forms electric loop between them, the air inlet pipe (2.1) that supplied gas enters is provided with in described plasma transferred arc torch (2), described plasma transferred arc (3) is placed between plasma transferred arc torch (2) and crucible (1), described graphite (4) is located at the bottom of crucible (1), the top of described plasma transferred arc (3) is provided with the feed pipe (2.2) added for raw metal, its weak point is: one is that plasma transferred arc arc (3) needs to support the use graphite (4) and crucible (1), make the raw material of equipment use many, production cost is high, two is the insulation materials arranging resistant to elevated temperatures crucible in vapourizing furnace and be incubated crucible, when metal material is flashed to metal gas by the fused solution of the nearly boiling point of high temperature, vapourizing furnace inner chamber as easy as rolling off a log pollution by impurity element in impurity in crucible and crucible Self substances element and insulation material under negative pressure normality is doped in high pure metal boil-off gas, cause high pure metal or the serious secondary pollution of high purity alloys metal, the object of producing high pure metal or high purity alloys metal powder material cannot be reached, have a strong impact on the quality of produced high pure metal or high purity alloys metal micro nano powder material, cause high-end electronic product, new forms of energy industry, space flight and aviation industry is to the demand of high pure metal or high purity alloys metal micro nano powder material and application, three is evaporate under the nearly boiling temperature state of alloy material high temperature in crucible, cause the boiling temperature that alloy material is different, its boiling temperature difference is very large, under high temperature fused state, the metal material of the low boiling temperature in crucible is caused to evaporate in advance in a large number, higher boiling temperature metal material slow evaporation is (as 1. sn-ag alloy: the boiling temperature of tin is 2602 DEG C, and silver-colored boiling temperature is 2162 DEG C, 2. ormolu: the boiling temperature of copper is 2562 DEG C, the boiling temperature of zinc is 907 DEG C), cause the alloy material of required proportioning cannot synchronously evenly evaporate in proportion at all, the alloy powder material of requirement ratio cannot be reached.
Summary of the invention
The object of this invention is to provide the device and method of a kind of bull plasma untransferable arc polymerization high purity metal-powder.
The object of the present invention is achieved like this:
The device of bull plasma untransferable arc polymerization high purity metal-powder, comprise the vapourizing furnace connected into by furnace wall and bell, described bell is provided with feed pipe, bell outer surface outside feed pipe is laid with plural plasma untransferable arc rifle, the discharging opening of feed pipe and the shower nozzle of plasma untransferable arc rifle all stretch in vapourizing furnace inner chamber, one end of discharge nozzle and vapourizing furnace inner space, the other end is communicated with the charging aperture of the collector with drainage conduit, the gas outlet of collector is provided with gas-solid separator, the gas outlet of gas-solid separator connects air exhauster successively by cooling tube, circulate with vapourizing furnace inner chamber after heat exchanger and be communicated with, stretch out the inner space with storage vat after the feed pipe connection traffic control valve outside bell, with on the pipeline of the inner space of cooling tube or parts, vavuum pump is installed.
Above-mentioned plasma untransferable arc rifle has 2-10, the axis angle of the axis and vapourizing furnace that often prop up plasma untransferable arc rifle is 5-40 to spend, the axis of all plasma untransferable arc rifles and the axes intersect of feed pipe are in a bit, and plasma untransferable arc rifle provides power supply by plasma-arc cabinet.
The internal diameter of above-mentioned feed pipe is 0.5-10mm.
Above-mentioned discharge nozzle is disposed with cooling water jacket layer, adiabator layer, exotic material layer from outside to inside, and described exotic material is zirconia or graphite or high temperature resistant synthetic material or high temperature resistant quartz material.
Above-mentioned furnace wall and bell are double-layer stainless steel jacket structure for water, furnace wall with bell is provided with the Inlet and outlet water joint be communicated with double-layer stainless steel water jacket, bell or furnace wall are provided with the visor observing vapourizing furnace inner case.
That above-mentioned shower nozzle stretches into vapourizing furnace inner chamber and be coated with at the outer surface of the shower nozzle stretching into vapourizing furnace inner chamber the sheath that exotic material makes, described sheath zirconia or graphite or high temperature resistant synthetic material or high temperature resistant quartz material manufacture.
The concrete structure of above-mentioned collector is: collector shell is with cooling jacket, the skin of cooling jacket is provided with water inlet and delivery port, collector lumen segmentation is become epicoele and cavity of resorption by the dividing plate of the transverse direction arranged in collector inner chamber, gas solid separation screen pipe has been spaced in cavity of resorption, the lower end closed of gas solid separation screen pipe, the tube connector that upper end connects passes dividing plate after-opening in epicoele, each tube connector in epicoele is provided with the solenoid electric valve of blow-back, tube connector between solenoid electric valve with dividing plate is connected with the air supply pipe be communicated with high pressure tank by Y-pipe, described discharge nozzle is communicated with the cavity of resorption of collector, the gas outlet of described collector is arranged on the epicoele of collector, the solenoid electric valve of described blow-back is controlled by controller.
Above-mentioned cooling tube is communicated with the cooling bronchus be communicated with the cavity of resorption of collector with discharge nozzle respectively.
The external diameter of above-mentioned gas solid separation screen pipe is 8-85mm, the wall thickness of gas solid separation screen pipe is 1-5mm, described gas solid separation screen pipe has 8-80, in cavity of resorption, the length of gas solid separation screen pipe is 20-3000mm, distance between adjacent two gas solid separation screen pipe outer walls is 1-500mm, and the distance between the gas solid separation screen pipe outer wall of ragged edge and inner collector wall is 1-500mm.
The method of the device high purity metal-powder of above-mentioned bull plasma untransferable arc polymerization high purity metal-powder, comprises the steps:
(1) start vavuum pump, after discharge nozzle inner chamber vapourizing furnace inner chamber, collector inner chamber and circulation are communicated with, cooling tube inner chamber vacuumize, inject the inert gas of 10-90KPa;
(2) single solid metal or metal alloy are pulverized the metal dust grinding to form 1-300um, this metal dust is dropped in storage vat;
(3) start plasma-arc cabinet and make the work of plasma untransferable arc rifle, open the recirculated cooling water device on vapourizing furnace, collector, start the cooling air circulation system of collector, gas-solid separator, air exhauster, heat exchanger, vapourizing furnace composition, to control the temperature of vapourizing furnace inner chamber, discharge nozzle inner chamber, cooling tube inner chamber, collector inner chamber;
(4) by the valve on feed pipe and flow control valve by the metal dust stored in storage vat quantitatively and send into vapourizing furnace inner chamber from the axis direction of feed pipe continuously and become gaseous metal with the crossing transient evaporation of arc light that plasma untransferable arc rifle sprays;
(5) after the gaseous metal in stove to be evaporated reaches certain concentration or gasification certain hour, start vavuum pump and air exhauster, gaseous metal enters the cavity of resorption of collector through discharge nozzle, through the filtration of gas solid separation screen pipe, gas has a road to be communicated with the vacuum keeping collector inner chamber with vavuum pump, another road is through gas-solid separator, air exhauster, heat exchanger, vapourizing furnace inner chamber is returned after gas purification filter, the cavity of resorption that portion gas enters discharge nozzle and collector through bronchus participates in cooling, submicron metal after gas solid separation screen pipe filters regularly is discharged by the drainage conduit of collector cavity of resorption,
(6) blowback in the gases at high pressure stored in high pressure tank are regularly sent into gas solid separation screen pipe by the solenoid electric valve controlled by controller centre bore by Y-pipe air supply pipe, blows down the submicron metal of shutoff on gas solid separation screen pipe micropore and on collector intracavity sidewall and regularly discharges through drainage conduit.
Above-mentioned nano metal is one of nano level silicon, silver, tin, copper, aluminium, lead, chromium, manganese, described nano metal alloy is nano level tin Kufil or the nano metal alloy such as corronil or cupromanganese, described inert gas is one of nitrogen or argon gas, and the injection rate of inert gas is preferably 60-70KPa.
The present invention gives prominence to compared to existing technology and useful technique effect is:
1, resistant to elevated temperatures crucible is not set in vapourizing furnace of the present invention and crucible has been carried out to the insulation material of insulation, avoid high temperature metallic material when the fused solution evaporated metal gas of the nearly boiling point of high temperature, impurity element in impurity in crucible, crucible Self substances element and insulation material pollutes and is doped in high pure metal boil-off gas by vapourizing furnace inner chamber under negative pressure normality, avoid the secondary pollution of the metal dust that above-mentioned impurity of the prior art causes, the purity of the single metal or alloy metal dust of production is high.
2, the axis of the plasma untransferable arc rifle of vapourizing furnace of the present invention and the axes intersect of vapourizing furnace are in a bit, the metal dust raw material of 1-300um from feed pipe quantitatively slowly reinforced enter the inner chamber of vapourizing furnace after, gaseous metal is become through high temperature flash evapn in described joining, the submicron metal of 30-1200nm is produced through collector, particularly for two or more metal alloys, the uniformity of the submicron metal processed is good, the uniformity of required proportioning is high, alloy ratio is accurate, be conducive to later stage various electric slurry, the factures and applicationsh of welding colloidal materials.
3, the present invention is applicable to high-end electronic product, new forms of energy industry, space flight and aviation industry to the demand of nanoscale high pure metal or nanoscale high purity alloys metal powder material and application.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is the close-up schematic view of collector in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, see Fig. 1-Fig. 2:
The device of bull plasma untransferable arc polymerization high purity metal-powder, comprise the vapourizing furnace 12 connected into by furnace wall 11 and bell 23, described bell 23 is provided with feed pipe 20, bell 23 outer surface outside feed pipe 20 is laid with plural plasma untransferable arc rifle 17, the discharging opening of feed pipe 20 and the shower nozzle 22 of plasma untransferable arc rifle 17 all stretch in vapourizing furnace inner chamber 41, one end of discharge nozzle 24 is communicated with vapourizing furnace inner chamber 41, the other end is communicated with the charging aperture 51 of the collector 50 with drainage conduit 28, the gas outlet of collector 50 is provided with gas-solid separator 30, the gas outlet of gas-solid separator 30 connects air exhauster 31 successively by cooling tube 32, circulate with vapourizing furnace 12 inner chamber after heat exchanger 35 and be communicated with, after the feed pipe 20 connection traffic control valve 19 stretching out outside bell 23 and the inner space of storage vat 18, with on the pipeline of the inner space of cooling tube or parts, vavuum pump 29 is installed, described parts are collector 50 or vapourizing furnace 12 etc., object is the object vacuumizing to reach negative-pressure cyclic to the inner chamber of collector 50 or vapourizing furnace 12.
Above-mentioned plasma untransferable arc rifle 17 has 2-10, the axis angle of the axis and vapourizing furnace 12 that often prop up plasma untransferable arc rifle 17 is 5-40 to spend, the axis 14 of all plasma untransferable arc rifles 17 and the axis 13 of feed pipe 20 intersect at a point B, and plasma untransferable arc rifle 17 provides power supply by plasma-arc cabinet 15.
The internal diameter of above-mentioned feed pipe 20 is 0.5-10mm.
The upside of the flow control valve 19 on above-mentioned feed pipe 20 is arranged at intervals with plural valve 34; two valve 34 alternation switches; flow is controlled through flow control valve 19; can be used for not shutting down charging; described discharge nozzle 24 is disposed with cooling water jacket layer, adiabator layer, exotic material layer from outside to inside, and described exotic material is zirconia or graphite or high temperature resistant synthetic material or high temperature resistant quartz material.
Above-mentioned furnace wall 11 and bell 23 are double-layer stainless steel jacket structure for water, furnace wall 11 with bell 23 is provided with the Inlet and outlet water joint 10,40 be communicated with double-layer stainless steel water jacket, bell 23 or furnace wall are provided with the visor 16 observing vapourizing furnace 12 inner case.
That above-mentioned shower nozzle stretches into vapourizing furnace inner chamber and be coated with at the outer surface of the shower nozzle stretching into vapourizing furnace inner chamber the sheath that exotic material makes, described sheath zirconia or graphite or high temperature resistant synthetic material or high temperature resistant quartz material manufacture.
The concrete structure of above-mentioned collector 50 is: collector 50 shell is with cooling jacket, the skin of cooling jacket is provided with water inlet and delivery port, collector 50 lumen segmentation is become epicoele 43 and cavity of resorption 45 by the dividing plate 44 of the transverse direction arranged in collector 50 inner chamber, gas solid separation screen pipe 33 has been spaced in cavity of resorption 45, the lower end closed of gas solid separation screen pipe 33, the tube connector 28 that upper end connects passes dividing plate 44 after-opening in epicoele 43, each tube connector 28 in epicoele 43 is provided with the solenoid electric valve 42 of blow-back, tube connector 28 between solenoid electric valve 42 with dividing plate 44 is connected with the air supply pipe 27 be communicated with high pressure tank 26 by Y-pipe, air supply pipe 27 is provided with the solenoid electric valve 42 of air feed, described discharge nozzle 24 is communicated with the cavity of resorption 45 of collector 50, the gas outlet of described collector 50 is arranged on the epicoele 43 of collector 50, the solenoid electric valve 42 of described blow-back and the solenoid electric valve 42 of air feed are controlled by controller.
Above-mentioned cooling tube 32 is communicated with the cooling bronchus 39 be communicated with the cavity of resorption 45 of collector 50 with discharge nozzle 24 respectively.
The external diameter L2 of above-mentioned gas solid separation screen pipe 33 is 8-85mm, the wall thickness of gas solid separation screen pipe 33 is 1-5mm, described gas solid separation screen pipe 33 has 8-80, in cavity of resorption 45, the length L4 of gas solid separation screen pipe 33 is 20-3000mm, distance L1 between adjacent two gas solid separation screen pipe 33 outer walls is 1-500mm, and the distance L3 between gas solid separation screen pipe 33 outer wall of ragged edge and collector 50 inwall is 1-500mm.
By the method for the device high purity metal-powder of bull plasma untransferable arc polymerization high purity metal-powder, comprise the steps:
(1) vavuum pump is started, after discharge nozzle inner chamber vapourizing furnace inner chamber, collector inner chamber and circulation are communicated with, cooling tube inner chamber vacuumize (vacuum is 0Pa or less), inert gas injecting, the pressure of inert gas is 10-90KPa;
(2) single solid metal or metal alloy are pulverized the metal dust grinding to form 1-300um (the best is 3-9um), this metal dust is dropped in storage vat 18;
(3) start plasma-arc cabinet and make the work of plasma untransferable arc rifle, open the recirculated cooling water device on vapourizing furnace, collector, start the cooling air circulation system of collector, gas-solid separator, air exhauster, heat exchanger, vapourizing furnace composition, to control the temperature of vapourizing furnace inner chamber, discharge nozzle inner chamber, cooling tube inner chamber, collector inner chamber;
(4) by the valve 34 on feed pipe 20 and flow control valve 19 by the metal dust stored in storage vat 18 quantitatively and send into vapourizing furnace 12 inner chamber from the axis direction of feed pipe 20 continuously and become gaseous metal with the crossing transient evaporation of the arc light of 12000-18000 DEG C that plasma untransferable arc rifle 17 sprays;
(5) vavuum pump 29 and air exhauster 31 is started, gaseous metal enters the cavity of resorption of collector 50 through discharge nozzle 24, micro porous filtration on gas solid separation screen pipe 33 tube wall, gas has a road to be communicated with vavuum pump 29 vacuum keeping collector 50 inner chamber, another road is through gas-solid separator 30, air exhauster 31, vapourizing furnace 12 inner chamber is returned after heat exchanger 35, the cavity of resorption that portion gas enters discharge nozzle 24 and collector 50 through bronchus participates in cooling, submicron metal after gas solid separation screen pipe 33 filters regularly is discharged by the drainage conduit 28 of collector 50 cavity of resorption,
(6) blowback in the gases at high pressure stored in high pressure tank 26 are regularly sent into gas solid separation screen pipe 33 by the solenoid electric valve 42 controlled by controller centre bore by Y-pipe air supply pipe 27, blown down by the submicron metal of shutoff on gas solid separation screen pipe 33 micropore and on collector 50 intracavity sidewall and regularly discharge through drainage conduit 28, the average diameter of the submicron metal of discharge is 10-1000nm.
Drainage conduit 28 is at least provided with two valves, 34, two valve 34 alternation switches, can keeps not shutting down discharging.
Above-mentioned nano metal is one of nano level silicon, silver, tin, copper, aluminium, lead, chromium, manganese, described nano metal alloy is nano level tin Kufil or the metal alloy such as corronil or cupromanganese, described inert gas is one of nitrogen or argon gas, and the pressure of inert gas is 60-70KPa.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalence changes done according to structure of the present invention, shape, principle, all should be covered by within protection scope of the present invention.
Claims (11)
1. the device of bull plasma untransferable arc polymerization high purity metal-powder, comprise the vapourizing furnace connected into by furnace wall and bell, it is characterized in that: described bell is provided with feed pipe, bell outer surface outside feed pipe is laid with plural plasma untransferable arc rifle, the discharging opening of feed pipe and the shower nozzle of plasma untransferable arc rifle all stretch in vapourizing furnace inner chamber, one end of discharge nozzle and vapourizing furnace inner space, the other end is communicated with the charging aperture of the collector with drainage conduit, the gas outlet of collector is provided with gas-solid separator, the gas outlet of gas-solid separator connects air exhauster successively by cooling tube, circulate with vapourizing furnace inner chamber after heat exchanger and be communicated with, stretch out the inner space with storage vat after the feed pipe connection traffic control valve outside bell, with on the pipeline of the inner space of cooling tube or parts, vavuum pump is installed.
2. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 1, it is characterized in that: described plasma untransferable arc rifle has 2-10, the axis angle of the axis and vapourizing furnace that often prop up plasma untransferable arc rifle is 5-40 to spend, the axis of all plasma untransferable arc rifles and the axes intersect of feed pipe are in a bit, and plasma untransferable arc rifle provides power supply by plasma-arc cabinet.
3. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 1, is characterized in that: the internal diameter of described feed pipe is 0.5-10mm.
4. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 1, it is characterized in that: described discharge nozzle is disposed with cooling water jacket layer, adiabator layer, exotic material layer from outside to inside, described exotic material is zirconia or graphite or high temperature resistant synthetic material or high temperature resistant quartz material.
5. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 1, it is characterized in that: described furnace wall and bell are double-layer stainless steel jacket structure for water, furnace wall with bell is provided with the Inlet and outlet water joint be communicated with double-layer stainless steel water jacket, bell or furnace wall are provided with the visor observing vapourizing furnace inner case.
6. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 1, it is characterized in that: that described shower nozzle stretches into vapourizing furnace inner chamber and be coated with at the outer surface of the shower nozzle stretching into vapourizing furnace inner chamber the sheath that exotic material makes, described sheath zirconia or graphite or high temperature resistant synthetic material or high temperature resistant quartz material manufacture.
7. according to the device of the bull plasma untransferable arc polymerization high purity metal-powder described in claim 1-6, it is characterized in that: the concrete structure of described collector is: collector shell is with cooling jacket, the skin of cooling jacket is provided with water inlet and delivery port, collector lumen segmentation is become epicoele and cavity of resorption by the dividing plate of the transverse direction arranged in collector inner chamber, gas solid separation screen pipe has been spaced in cavity of resorption, the lower end closed of gas solid separation screen pipe, the tube connector that upper end connects passes dividing plate after-opening in epicoele, each tube connector in epicoele is provided with the solenoid electric valve of blow-back, tube connector between solenoid electric valve with dividing plate is connected with the air supply pipe be communicated with high pressure tank by Y-pipe, described discharge nozzle is communicated with the cavity of resorption of collector, the gas outlet of described collector is arranged on the epicoele of collector, the solenoid electric valve of described blow-back is controlled by controller.
8. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 7, is characterized in that: described cooling tube is communicated with the cooling bronchus be communicated with the cavity of resorption of collector with discharge nozzle respectively.
9. the device of bull plasma untransferable arc polymerization high purity metal-powder according to claim 7, it is characterized in that: the external diameter of described gas solid separation screen pipe is 8-85mm, the wall thickness of gas solid separation screen pipe is 1-5mm, described gas solid separation screen pipe has 8-80, in cavity of resorption, the length of gas solid separation screen pipe is 20-3000mm, distance between adjacent two gas solid separation screen pipe outer walls is 1-500mm, and the distance between the gas solid separation screen pipe outer wall of ragged edge and inner collector wall is 1-500mm.
10. the method for the device high purity metal-powder of bull plasma untransferable arc polymerization high purity metal-powder as claimed in claim 7, is characterized in that: comprise the steps:
(1) vavuum pump is started, after discharge nozzle inner chamber vapourizing furnace inner chamber, collector inner chamber and circulation are communicated with, cooling tube inner chamber vacuumize, inert gas injecting, the pressure of inert gas is 10-90KPa;
(2) single solid metal or metal alloy are pulverized the metal dust grinding to form 1-300um, this metal dust is dropped in storage vat;
(3) start plasma-arc cabinet and make the work of plasma untransferable arc rifle, open the recirculated cooling water device on vapourizing furnace, collector, start the cooling air circulation system of collector, gas-solid separator, air exhauster, heat exchanger, vapourizing furnace composition, to control the temperature of vapourizing furnace inner chamber, discharge nozzle inner chamber, cooling tube inner chamber, collector inner chamber;
(4) by flow control valve on feed pipe by the metal dust stored in storage vat or alloy powder quantitatively and send into vapourizing furnace inner chamber from the axis direction of feed pipe continuously and become gaseous metal with the crossing transient evaporation of arc light that plasma untransferable arc rifle sprays;
(5) vavuum pump and air exhauster is started, gaseous metal enters the cavity of resorption of collector through discharge nozzle, through the filtration of gas solid separation screen pipe, the vacuum that gas has a road to be communicated with vavuum pump to keep collector inner chamber, another road return vapourizing furnace inner chamber after gas-solid separator, air exhauster, heat exchanger, the cavity of resorption that portion gas enters discharge nozzle and collector through bronchus participates in cooling, and the submicron metal after gas solid separation screen pipe filters regularly is discharged by the drainage conduit of collector cavity of resorption;
(6) blowback in the gases at high pressure stored in high pressure tank are regularly sent into gas solid separation screen pipe by the solenoid electric valve controlled by controller centre bore by Y-pipe air supply pipe, blows down the submicron metal of shutoff on gas solid separation screen pipe micropore and on collector intracavity sidewall and regularly discharges through drainage conduit.
The method of 11. bull plasma untransferable arc polymerization high purity metal-powders according to claim 10, it is characterized in that: described nano metal is one of nano level silicon, silver, tin, copper, aluminium, lead, chromium, manganese, described nano metal alloy is nano level tin Kufil or corronil or cupromanganese, described inert gas is one of nitrogen or argon gas, and the pressure of inert gas is 60-70KPa.
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