CN107030292A - A kind of multistage cooling prepares the plasma atomising device of metal dust - Google Patents
A kind of multistage cooling prepares the plasma atomising device of metal dust Download PDFInfo
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- CN107030292A CN107030292A CN201710305533.4A CN201710305533A CN107030292A CN 107030292 A CN107030292 A CN 107030292A CN 201710305533 A CN201710305533 A CN 201710305533A CN 107030292 A CN107030292 A CN 107030292A
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- metal
- atomising device
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- 238000001816 cooling Methods 0.000 title claims abstract description 148
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 109
- 239000002184 metal Substances 0.000 title claims abstract description 109
- 239000000428 dust Substances 0.000 title claims abstract description 39
- 239000012159 carrier gas Substances 0.000 claims abstract description 53
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 35
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000004411 aluminium Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 19
- 239000002826 coolant Substances 0.000 claims description 15
- 230000006911 nucleation Effects 0.000 claims description 15
- 238000010899 nucleation Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 8
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007812 deficiency Effects 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 238000010314 arc-melting process Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000021050 feed intake Nutrition 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000001883 metal evaporation Methods 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The present invention discloses the plasma atomising device that a kind of multistage cooling prepares metal dust；The technical problem of solution：The technical deficiency existed for the existing plasma atomising device referred in background technology.The technical scheme of use：A kind of multistage cooling prepares the plasma atomising device of metal dust, including reactor, and vertical dog-house and the access road for being used to insert plasma flare of at least one with reactor intracavity inter-connection are set on the shell wall of reactor；Cooling zone passage is set on the shell wall of reactor, and cooling zone passage is divided into indirect cooling section and direct cooling section, and cooling section is located at close to reactor one end indirectly, and direct cooling section is located remotely from the reactor other end；At least one carrier gas air supply opening for being used to be passed through carrier gas is set on the shell wall of the reactor of cooling zone channel circumference.Advantage：This multistage cooling prepares the plasma atomising device of metal dust, prepares purity height and the homogeneous metal dust of particle diameter distribution.
Description
Technical field
The present invention relates to the plasma atomising device that a kind of multistage cooling prepares metal dust, it is related to field of new materials.
Background technology
Requirement of the fields such as 3D printing, electronic component to metal dust is higher, not only needs to possess outside good plasticity, also
It must is fulfilled for the requirements such as impurity is few, powder diameter is small, particle diameter distribution is narrow, sphericity is high, good fluidity.Plasma is atomized legal system
Standby metal dust is to make raw material metal using high-temperature plasma moment melting evaporation forms metal vapors at high temperature, then
Metal core is formed through cooling, crystallization, then growth forms tiny metallic particles.Metal vapors/drop condenses in the gas phase, system
Metal dust crystallinity height, the impurity obtained is few.
Plasma atomising device is all provided with longer cooling section.At present, the cooling of molten drop/steam usually through with
The single direct contact type cooling of carrier gas progress or indirect contact cool down to realize, such as Pyrogenesis companies of Canada are special
Sharp (A1 of WO 2016/191854).Direct contact type is cooled down because gaseous environment temperature is low, molten drop/steam is dilute through carrier gas
The factors such as rear concentration reduction are released, and are unfavorable for forming homogeneous, stable metal core, and yield is relatively low；And indirect contact is cold
Although can but avoid above mentioned problem, due to the nearly internal face of indirect contact cooling device and the stream of nearly central area carrier gas
Speed, temperature, the inhomogeneity of the concentration of molten drop/steam, cause the time of molten drop/steam condensation nucleation sedimentation to be differed
Cause, and there is larger limitation in terms of the narrower metal dust of particle diameter distribution is obtained.
The content of the invention
The technical problems to be solved by the invention are：Deposited for the existing plasma atomising device referred in background technology
Technical deficiency.
The present invention design philosophy be, to solve the above problems, propose a kind of multistage cooling prepare metal dust etc.
Gas ions atomising device；The device core is to make metal melting using the plasma produced between plasma torch and metal
Evaporation produces metal vapors；Carrier gas, which is passed through after reactor to carry after metal vapors enters cooling section, forms metal dust；Cooling
Section is divided into indirect cooling section and direct cooling section；Metal vapors is first through indirect cooling section nucleation, by directly cooling
Section crystalline growth；Indirect cooling section device inwall, which is set, to be distributed in definite shape and contributes to molten drop/steam and load
The well-mixed water conservancy diversion mixer element of gas, is conducive to preparing purity height and the homogeneous metal dust of particle diameter distribution.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of multistage cooling prepares the plasma atomising device of metal dust, including realizes that plasma metal melting steams
The reactor of hair, on the shell wall of reactor set with reactor intracavity inter-connection be used for raw metal add vertically feed intake
Mouth and the access road for being used to insert plasma flare of at least one；Cooling zone passage is set on the shell wall of reactor,
Cooling zone passage is divided into indirect cooling section and direct cooling section, and cooling section is located at close reactor one end indirectly, directly
Connect cooling section and be located remotely from the reactor other end；At least one is set to use on the shell wall of the reactor of cooling zone channel circumference
In the carrier gas air supply opening for being passed through carrier gas；
It is axially disposed on the inner tubal wall of indirect cooling section to be used to cause leading of being well mixed with carrier gas of metal vapors
Mixer element is flowed, water conservancy diversion mixer element is arranged on the upstream of metal vapor condensation nucleation settling zone；
Cooling medium is set to carry out the carrier gas in cooling tube and metallic vapour in the circumference of external tube of indirect cooling section non-
Contact radiant heat transfer cools.
The plasma atomising device of the present invention, obtains the metal dust that particle diameter distribution is narrow and production capacity is high.
The plasma atomising device of the present invention, cooling section includes indirect cooling section and direct cooling section.Indirectly
The cooling of cooling section is by the peripheral cooling medium of cooling tube and carrier gas and the contactless radiation of metal vapors in cooling tube
Conduct heat to realize；Direct contact type cooling is that the direct contact cooling for relying on cooling medium and metal core/metal dust comes real
Existing.Indirect cooling section, cooling medium is located at cooling tube periphery, and cooling medium is not contacted directly with metal vapors；It is directly cold
But section, cooling medium is directly contacted with metal core (and metal vapors).Carrier gas is carried metal vapors to indirect by reactor
Cooling section is indirectly cooled, the sedimentation of metal vapors nucleation；Then metal vapors and metal core enter direct cooling section with it is cold
But physical contact between media is cooled down.Indirect cooling section device inwall sets water conservancy diversion mixer element, contributes to molten drop/steam
It is sufficiently mixed with carrier gas；Water conservancy diversion mixer element is arranged at indirect cooling section metal vapors nucleated areas upstream；Water conservancy diversion mixer element is set
There are certain size, the step of quantity and arranged by certain way axially.
Improvement to technical solution of the present invention, access road is obliquely installed.
Further improvement to above-mentioned technical proposal, access road is symmetrical arranged on the axis of reactor.Entrance leads to
The setting in road can guarantee that the abundant melting evaporation of raw metal.
Improvement to technical solution of the present invention, water conservancy diversion mixer element is wedge step block, and water conservancy diversion mixer element is cooled down along indirect
Helically line is distributed on the inner tubal wall of indirect cooling section for the axial direction of the inner tube of section.
Improvement to technical solution of the present invention, the length dimension of water conservancy diversion mixer element is 1-100mm.
Improvement to technical solution of the present invention, indirect cooling section includes at least two sections of different inner diameters section.
Improvement to technical solution of the present invention, the carrier gas atmosphere being passed through by carrier gas air supply opening is nitrogen, argon gas or other are lazy
Property gas atmosphere.
Improvement to technical solution of the present invention, the circumference of external tube of indirect cooling section set cooling medium be cold water, warm water,
Ethanol, carrier gas.
Improvement to technical solution of the present invention, raw metal is titanium, platinum, gold, silver, calcium, cobalt, copper, iron, aluminium, nickel, zirconium, magnesium
Deng conducting metal raw material.
Improvement to technical solution of the present invention, the plasma atomising device that multistage cooling prepares metal dust also includes carrying
Gas supply arrangement.
The important technical advantage of this new bipolar electrode arc melting process is summarized as follows：
1st, multistage cooling of the invention prepares the plasma atomising device of metal dust, a variety of arrangements of plasma torch
Mode ensure that the abundant fusing evaporation of raw metal；And due to being provided with water conservancy diversion mixer element in indirect cooling section so that
Metal vapors is well mixed with carrier gas, and the flow rate of carrier gas in each orientation, carrier gas temperature, metal vapors concentration are homogeneous in cooling tube,
The metal dust particle diameter distribution prepared is narrow.
2nd, multistage cooling of the invention prepares the plasma atomising device of metal dust, indirect cooling section metal into
Core settling zone upstream sets water conservancy diversion mixer element so that metal vapors being capable of nucleation, life in a more stable, homogeneous environment
Long and crystallization.Simultaneously as metal vapors nucleation stage is using indirect cooling, metal vapors concentration will not be diluted, metal into
Core rate is high, ensure that high production capacity.
Brief description of the drawings
Fig. 1 is the plasma atomising device figure scheme one that multistage cooling prepares metal dust.
Fig. 2 is the plasma atomising device figure scheme two that multistage cooling prepares metal dust.
Fig. 3 is the partial enlarged drawing of indirect cooling section cooling tube water conservancy diversion mixer element.
Embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
To make present disclosure more obvious understandable, done further below in conjunction with accompanying drawing 1- Fig. 3 and embodiment
Description.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Disclosed by the invention is the plasma atomising device that a kind of multistage cooling prepares metal dust, is carried out for producing
Particulate metal powder needed for increasing material manufacturing or electronic component manufacture.
As illustrated in fig. 1 and 2, multistage cooling prepares the plasma atomising device of metal dust, including realizes plasma
The reactor of metal melting evaporation, sets on the shell wall of reactor and is added with reactor intracavity inter-connection for raw metal
Vertical dog-house 8 and at least one be used for insert the access road of plasma flare 2；Set on the shell wall of reactor
Cooling zone passage 11, cooling zone passage is divided into indirect cooling section 9 and direct cooling section 10, and cooling section is located at and leaned on indirectly
Proximal response device one end, direct cooling section is located remotely from the reactor other end；The shell wall of the reactor of channel circumference in cooling zone
It is upper that at least one carrier gas air supply opening 6 for being used to be passed through carrier gas is set；It is axially disposed on the inner tubal wall of indirect cooling section to use
In the water conservancy diversion mixer element 13 for make it that metal vapors is well mixed with carrier gas, water conservancy diversion mixer element is arranged on metal vapor condensation nucleation and sunk
The upstream in region drops；Cooling medium is set to enter the carrier gas in cooling tube and metallic vapour in the circumference of external tube of indirect cooling section
The contactless radiant heat transfer cooling of row.
As illustrated in fig. 1 and 2, multistage cooling prepares the plasma atomising device of metal dust, utilizes high-temperature plasma 1
Making raw metal, the broken evaporation of instant melting forms molten drop/steam into device cooling zone passage 11 at high temperature.
The raw metal form that the device is used is not restricted by, and can be powdery, thread, bar-shaped etc., the chi of its raw material
Very little can be in the range of several millimeters to tens millimeters.The species of raw metal can be titanium, platinum, gold, silver, calcium, cobalt, copper, iron,
The conducting metal raw material such as aluminium, nickel, zirconium, magnesium.Understand for convenience, following examples are illustrated by taking metallic aluminium as an example, but should
The applicable raw metal of invention is not limited to metallic aluminium.
A certain amount of metallic aluminium is put into reactor from dog-house 8 first, and is disappeared in the process of running according to metallic aluminium
The amount of consumption is supplemented in real time；The device ensure that the continuous and steady operation of one day.
Be arranged on the plasma torch 2 of reactor top setting, by plasma torch negative electrode (negative pole) 3 and anode (just
Pole) between produce plasma, then positive pole is transferred to the anode 5 of reactor bottom, the high-temperature plasma fusing reaction of formation
Metallic aluminium in device, forms the metallic aluminium 4 of molten state.The heat that plasma torch 2 is provided further evaporates the melting on top layer
State metallic aluminium, forms aluminum vapor.
Carrier gas supply is set to be sent into carrier gas to carry aluminum vapor by carrier gas inlet 6.The species of carrier gas need to be according to preparing metal
The type of powder determines that as a rule the carrier gas atmosphere in reactor is nitrogen, argon gas or other inert gas atmospheres, so as to protect
The obtained metal dust of card meets the requirement of the extremely low oxygen content of the fields such as increasing material manufacturing requirement.
The carrier gas for carrying aluminum vapor enters the cooling zone passage 11 of the present apparatus.The cooling section by with aluminum vapor/aluminium
The indirect cooling section 9 of powder mediate contact and constituted with the direct cooling section 10 that aluminum vapor/aluminium powder is directly contacted.
Temperature inside indirect cooling section 9 is monitored in real time, and cooling tube internal and external temperature can all be cooled down by adjusting
What rate-of flow was controlled, the cooling medium can be using cold water, warm water, ethanol, carrier gas etc..But in view of cooling effectiveness and
Cooling cost, is generally cooled down using cold water or warm water as cooling medium to indirect cooling section 9.
Indirect cooling section can include two or more different internal diameter sections.Generally, I grades of indirect cooling section conducts
Aluminum vapor is from reactor to cooling down intersegmental changeover portion indirectly；And II grades of indirect cooling sections are then as aluminum vapor from indirect cooling section
To directly cooling down intersegmental changeover portion.The internal diameter of I grades of indirect cooling sections sets small compared with II grades of cooling sections, to ensure in cooling section
The concentration of upstream (I grades of indirect cooling sections) aluminum vapor is higher, effectively nucleation can settle.II grades of cooling section aluminum vapor concentration drops
It is low, then enter direct cooling section to promote crystalline growth of the metal core in a more homogeneous atmosphere.
Aluminum vapor remains unchanged when carrying through carrier gas and be transferred to indirect cooling section and maintains very high temperature, and its cooling is mainly
Realized by radiant heat transfer, in the section because temperature is strictly controlled, it is thus possible to ensure metallic aluminium stable uniform
Nucleation is settled, to realize final homogeneous, the narrow distribution for preparing gained aluminium powder particle diameter.
In direct cooling section, cooling medium is passed directly into direct cooling section cooling tube and directly contacted with aluminum vapor/aluminium powder
Mixing.The cooling medium of direct cooling section can be consistent or different from the cooling medium of indirect cooling section.In order to easy to operate and
Consideration in cost, it is proposed that be considered as being cooled down with carrier gas identical atmosphere, such as nitrogen, argon gas or inert gas.
In indirect cooling section, aluminum vapor and aluminium powder coexist, and aluminum vapor amount are swum under a cooling low compared with upstream；Aluminum vapor
A small amount of it may be coexisted with aluminium powder in direct cooling section.But optimal situation be regulation flow rate of carrier gas and flow velocity, indirectly it is cold
But the factor such as section and direct cooling section internal diameter and length is only aluminum metal core realize direct cooling section carrier gas carrying, such
The aluminium powder particle diameter distribution arrived is most narrow, most homogeneous.
Carrier gas carries aluminum vapor and aluminium powder and will be brought into after indirect cooling section and direct cooling section separate and collect dress respectively
(not shown) is put, the recycling of gas solid separation and carrier gas can be achieved in the device.Metal dust is sized collection；
And the gas being recovered then is admitted to carrier gas air supply opening 6 and 7 by carrier gas air supply unit.
When metal vapors brings indirect cooling section into by carrier gas by reactor, the temperature of carrier gas and metal vapors mixed gas
Degree is very high, usually thousands of degrees Celsius.Cooled down by radiant heat transfer, the temperature of mixed gas is gradually reduced, close to metal
Boiling point, metal gradually nucleation and is settled.The particular location of metal nucleation sedimentation and metal types, metal vapors concentration, load
Gas velocity, metal vapors are related to the Temperature Distribution that carrier gas is formed in the temperature and cooling tube of mixed gas.
For the ease of being illustrated to embodiment, it is assumed that the region of metal nucleation sedimentation is at the mark 12 shown in Fig. 3.Such as
Shown in Fig. 3, the partial enlarged drawing display cooling inside pipe wall of indirect cooling section cooling tube is provided with water conservancy diversion mixer element, in the present embodiment
In be wedge step.The presence of wedge step, makes to mix and disturb inside the mixed gas being made up of with metallic vapour carrier gas
It is dynamic, with avoid due to the nearly internal face of indirect contact cooling device and the flow velocity of nearly central area carrier gas, temperature, molten drop/
The inhomogeneity of the concentration of steam, caused molten drop/steam condensation nucleation sedimentation time is inconsistent.
Quantity, size and the distribution mode that wedge step is set are needed according to metal types, metal vapors concentration, carrier gas stream
The actual conditions such as the Temperature Distribution in speed, mixed gas temperature, cooling tube are determined.If the too conference of the size of wedge step causes
The inhomogeneity that mixed gas interior metal steam and metal core are distributed in cooling tube；And if the size of wedge step is too small,
Metal vapors and the well-mixed effect of carrier gas of Shi Jin centers and nearly internal face are not had then.In the specific embodiment of the invention
Wedge step is one of design that can be for reference in the distribution of axial screw shape, but is not limited thereto.
Wedge step is mainly disposed to the upstream in indirect cooling section metal nucleation region.The size suggestion control that step is set
In the range of 1~100mm, adjusted according to actual conditions.
According to the difference of metal types, to ensure that the set location of torch can not on the abundant melting evaporation of metal, reactor
It is adjusted, the inclination as shown according to Fig. 2 is arranged symmetrically the thermally equivalent melting evaporation that would be even more beneficial to metal.Correspondingly,
Carrier gas entrance can also make the appropriate adjustments.
The above-mentioned description to embodiment is understood that for the ease of those skilled in the art and using this hair
Bright patent.Person skilled in the art obviously can make change to these embodiments, and by general original described herein
It ought to use in other embodiment without passing through creative work.Therefore, patent of the present invention is not limited to implementation described here
Example, those skilled in the art do not depart from improvement and repair that the category of patent of the present invention made according to the announcement of patent of the present invention
Changing all should be within the protection domain of patent of the present invention.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (10)
1. a kind of multistage cooling prepares the plasma atomising device of metal dust, it is characterised in that including realizing plasma
The reactor of metal melting evaporation, sets on the shell wall of reactor and is added with reactor intracavity inter-connection for raw metal
Vertical dog-house and at least one be used for insert the access road of plasma flare；Set cold on the shell wall of reactor
But area's passage, cooling zone passage is divided into indirect cooling section and direct cooling section, and cooling section is located at close to reaction indirectly
Device one end, direct cooling section is located remotely from the reactor other end；Set on the shell wall of the reactor of cooling zone channel circumference
At least one carrier gas air supply opening for being passed through carrier gas；
The axially disposed water conservancy diversion for being used to metal vapors is well mixed with carrier gas is mixed on the inner tubal wall of indirect cooling section
Component, water conservancy diversion mixer element is arranged on the upstream of metal vapor condensation nucleation settling zone；
Cooling medium is set to carry out noncontact to the carrier gas in cooling tube and metallic vapour in the circumference of external tube of indirect cooling section
Formula radiant heat transfer cools.
2. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that entrance
Channel slopes are set.
3. multistage cooling as claimed in claim 2 prepares the plasma atomising device of metal dust, it is characterised in that entrance
Passage is symmetrical arranged on the axis of reactor.
4. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that water conservancy diversion
Mixer element is wedge step block, axial direction of inner tube of the water conservancy diversion mixer element along indirect cooling section helically line be distributed in it is indirect cold
But on the inner tubal wall of section.
5. multistage cooling as claimed in claim 4 prepares the plasma atomising device of metal dust, it is characterised in that water conservancy diversion
The length dimension of mixer element is 1-100mm.
6. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that indirectly
Cooling section includes at least two sections of different inner diameters section.
7. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that by carrying
The carrier gas atmosphere that gas air supply opening is passed through is nitrogen, argon gas or other inert gas atmospheres.
8. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that indirectly
The circumference of external tube of cooling section sets cooling medium to be cold water, warm water, ethanol, carrier gas.
9. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that metal
Raw material is the conducting metal raw materials such as titanium, platinum, gold, silver, calcium, cobalt, copper, iron, aluminium, nickel, zirconium, magnesium.
10. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that many
The plasma atomising device that level cooling prepares metal dust also includes carrier gas supply arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305533.4A CN107030292A (en) | 2017-05-03 | 2017-05-03 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305533.4A CN107030292A (en) | 2017-05-03 | 2017-05-03 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
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| Publication Number | Publication Date |
|---|---|
| CN107030292A true CN107030292A (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710305533.4A Pending CN107030292A (en) | 2017-05-03 | 2017-05-03 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
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| CN (1) | CN107030292A (en) |
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| CN110919000A (en) * | 2019-11-26 | 2020-03-27 | 北京工业大学 | Plug-in pneumatic injection device capable of being quickly disassembled and assembled |
| CN115383124A (en) * | 2022-09-02 | 2022-11-25 | 杭州新川新材料有限公司 | Cooling equipment for superfine metal powder |
| WO2023065581A1 (en) * | 2021-10-19 | 2023-04-27 | 江苏博迁新材料股份有限公司 | Metal vapor nucleation device for preparing ultrafine powder material by means of physical vapor phase method |
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