CN207119805U - 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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- CN207119805U CN207119805U CN201720481382.3U CN201720481382U CN207119805U CN 207119805 U CN207119805 U CN 207119805U CN 201720481382 U CN201720481382 U CN 201720481382U CN 207119805 U CN207119805 U CN 207119805U
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Abstract
The utility model discloses the plasma atomising device that a kind of multistage cooling prepares metal dust；The technical problem of solution：The technical deficiency existing for the existing plasma atomising device that is referred in background technology.The technical scheme of use：A kind of multistage cooling prepares the plasma atomising device of metal dust, including reactor, is set on the shell wall of reactor and the vertical dog-house of reactor intracavity inter-connection and at least one access road for being used to insert plasma flare；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 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, and the metal dust that purity is high and particle diameter distribution is homogeneous is prepared.
Description
Technical field
The plasma atomising device that a kind of multistage cooling prepares metal dust is the utility model is related to, is related to new material neck
Domain.
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 down, crystallizing, 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
Carrier gas carries out single direct contact type cooling or indirect contact cooling to realize, such as Canadian Pyrogenesis companies 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, the time of molten drop/steam condensation nucleation sedimentation is caused to be differed
Cause, and larger limitation be present in terms of the narrower metal dust of particle diameter distribution is obtained.
The content of the invention
Technical problem to be solved in the utility model is：Dress is atomized for the existing plasma referred in background technology
Put existing technical deficiency.
Design philosophy of the present utility model is, to solve the above problems, proposing a kind of multistage cooling prepares metal dust
Plasma atomising device；The device core is to make metal using caused plasma between plasma torch and metal
Melting 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 nucleated through indirect cooling section, by direct
Cooling section crystalline growth；Indirect cooling section device inwall, which is set, to be distributed in definite shape and contributes to molten drop/steam
With the well-mixed water conservancy diversion mixer element of carrier gas, be advantageous to that the metal dust that purity is high and particle diameter distribution is homogeneous is prepared.
In order to solve the above technical problems, the technical solution adopted in the utility model 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 at least one access road for being used to insert plasma flare；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.
Plasma atomising device of the present utility model, obtain the metal dust that particle diameter distribution is narrow and production capacity is high.
Plasma atomising device of the present utility model, cooling section include indirect cooling section and direct cooling section.
The cooling of indirect cooling section is by the contactless of cooling tube periphery cooling medium and carrier gas in cooling tube and metal vapors
Radiant heat transfer is realized；Direct contact type cooling is that the direct contact for relying on cooling medium and metal core/metal dust cools down
Come what is realized.Indirect cooling section, cooling medium are located at cooling tube periphery, and cooling medium does not contact directly with metal vapors；Directly
Cooling section is connect, cooling medium directly contacts with metal core (and metal vapors).Carrier gas by metal vapors by reactor carry to
Indirect cooling section is indirectly cooled, metal vapors nucleation sedimentation；Then metal vapors enters direct cooling section with metal core
Directly contact and cooled down with cooling medium.Indirect cooling section device inwall sets water conservancy diversion mixer element, contribute to molten drop/
Steam 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 mixes
Part is provided with certain size, the step of quantity and arranged by certain way axially.
Improvement to technical solutions of the utility model, access road are obliquely installed.
Further improvement to above-mentioned technical proposal, access road are 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 solutions of the utility model, water conservancy diversion mixer element are wedge step block, and water conservancy diversion mixer element is along indirect
Helically line is distributed on the inner tubal wall of indirect cooling section for the axial direction of the inner tube of cooling section.
Improvement to technical solutions of the utility model, the length dimension of water conservancy diversion mixer element is 1-100mm.
Improvement to technical solutions of the utility model, indirect cooling section include at least two sections of different inner diameters section.
Improvement to technical solutions of the utility model, the carrier gas atmosphere being passed through by carrier gas air supply opening is nitrogen, argon gas or its
His inert gas atmosphere.
Improvement to technical solutions of the utility model, the circumference of external tube of indirect cooling section set cooling medium be cold water,
Warm water, ethanol, carrier gas.
Improvement to technical solutions of the utility model, raw metal be titanium, platinum, gold, silver, calcium, cobalt, copper, iron, aluminium, nickel,
The conducting metal raw material such as zirconium, magnesium.
Improvement to technical solutions of the utility model, the plasma atomising device that multistage cooling prepares metal dust also wrap
Include carrier gas supply arrangement.
The important technical advantage of this new bipolar electrode arc melting process is summarized as follows：
1st, multistage cooling of the present utility model prepares the plasma atomising device of metal dust, plasma torch it is a variety of
Arrangement can ensure 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 equal in cooling tube
One, the metal dust particle diameter distribution being prepared is narrow.
2nd, multistage cooling of the present utility model prepares the plasma atomising device of metal dust, in indirect cooling section gold
Category nucleation settling zone upstream sets water conservancy diversion mixer element so that metal vapors can in a more stable, homogeneous environment into
Core, growth and crystallization.Simultaneously as metal vapors nucleation stage will not be diluted using cooling, metal vapors concentration indirectly, gold
It is high to belong to nucleation rate, high production capacity can be ensured.
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 solutions of the utility model are described in detail below, but the scope of protection of the utility model is not limited to
The embodiment.
To make content of the present utility model more obvious understandable, below in conjunction with accompanying drawing 1- Fig. 3 and embodiment do into
The description of one step.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.
The utility model discloses that a kind of multistage cooling prepares the plasma atomising device of metal dust, for producing
Carry out increasing material manufacturing or electronic component manufactures required particulate metal powder.
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, set on the shell wall of reactor and added with reactor intracavity inter-connection for raw metal
Vertical dog-house 8 and at least one access road for being used to insert plasma flare 2；Set on the shell wall of reactor
Cooling zone passage 11, cooling zone passage are divided into indirect cooling section 9 and direct cooling section 10, and indirectly cooling section positioned at leaning on
Proximal response device one end, direct cooling section are 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；The axially disposed use on the inner tubal wall of indirect cooling section
In the water conservancy diversion mixer element 13 for make it that metal vapors is well mixed with carrier gas, it is heavy that water conservancy diversion mixer element is arranged on metal vapor condensation nucleation
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, instant melting crushes evaporation and forms molten drop/steam and enter device cooling zone passage 11 at high temperature.
The raw metal form that the device uses 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.In order to facilitate understanding, following examples illustrate by taking metallic aluminium as an example, but should
The applicable raw metal of utility model 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 can ensure 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, form the metallic aluminium 4 of molten state.The heat that plasma torch 2 provides further evaporates the melting on top layer
State metallic aluminium, form aluminum vapor.
Carrier gas supply is set is 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
Metal dust made from card meets the requirement for the extremely low oxygen content that the fields such as increasing material manufacturing require.
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 formed with the direct cooling section 10 that aluminum vapor/aluminium powder directly contacts.
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 use cold water, warm water, ethanol, carrier gas etc..But in view of cooling effectiveness and
Cooling cost, generally use cold water or warm water cool down as cooling medium to indirect cooling section 9.
Indirect cooling section can include two or more different internal diameter sections.Generally, the indirect cooling section conduct of I levels
Aluminum vapor is from reactor to cooling down intersegmental changeover portion indirectly；And the indirect cooling section of II levels is then used as aluminum vapor from indirect cooling section
To directly cooling down intersegmental changeover portion.The internal diameter of the indirect cooling section of I levels sets small compared with II level cooling sections, to ensure in cooling section
The concentration of upstream (the indirect cooling section of I levels) aluminum vapor is higher, can effectively be nucleated sedimentation.II level cooling section aluminum vapors 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 carries through carrier gas and still maintains very high temperature when being transferred to indirect cooling section, and its cooling is mainly
Realized by radiant heat transfer, in the section because temperature strictly controls, it is thus possible to ensure metallic aluminium stable uniform
Nucleation sedimentation, 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 it is low compared with upstream to swim aluminum vapor amount under a cooling；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 are gradually nucleated and 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, the mixed gas inside for making to be made up of with metallic vapour carrier gas mix and disturbed
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 are 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 determine.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,
Not having then makes the metal vapors of nearly center and nearly internal face and the well-mixed effect of carrier gas.The utility model specific embodiment
In wedge step in the distribution of axial screw shape be one of design that can be for reference, but be 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 abundant melting of metal is evaporated, the set location of torch can not on 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 reality
Use new patent.Person skilled in the art obviously can make change to these embodiments, and by described herein one
As principle be applied in other embodiment without by creative work.Therefore, the utility model patent is not limited to retouch herein
The embodiment stated, those skilled in the art do not depart from the category of the utility model patent according to the announcement of the utility model patent
The improvement and modification made all should be within the protection domains of the utility model patent.
The utility model is not directed to partly same as the prior art or can 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, set on the shell wall of reactor and added with reactor intracavity inter-connection for raw metal
Vertical dog-house and at least one access road for being used to insert plasma flare；Set on the shell wall of reactor cold
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 are 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 mixes on the inner tubal wall of indirect cooling section
Component, water conservancy diversion mixer element are 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
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, the axial direction of inner tube of the water conservancy diversion mixer element along indirect cooling section helically line be distributed in it is indirectly 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 gas atmosphere or argon gas atmosphere.
8. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that indirectly
It is cold water, warm water, ethanol, carrier gas that the circumference of external tube of cooling section, which sets cooling medium,.
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 titanium, platinum, gold, silver, calcium, cobalt, copper, iron, aluminium, nickel, zirconium, magnesium conducting metal raw material.
10. multistage cooling as claimed in claim 1 prepares the plasma atomising device of metal dust, it is characterised in that more
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 |
|---|---|---|---|
| CN201720481382.3U CN207119805U (en) | 2017-05-03 | 2017-05-03 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720481382.3U CN207119805U (en) | 2017-05-03 | 2017-05-03 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030292A (en) * | 2017-05-03 | 2017-08-11 | 江苏天楹环保能源成套设备有限公司 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
| CN109940167A (en) * | 2018-12-25 | 2019-06-28 | 西安赛隆金属材料有限责任公司 | A kind of rotation electrode fuel pulverizing plant and method |
| 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 |
-
2017
- 2017-05-03 CN CN201720481382.3U patent/CN207119805U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030292A (en) * | 2017-05-03 | 2017-08-11 | 江苏天楹环保能源成套设备有限公司 | A kind of multistage cooling prepares the plasma atomising device of metal dust |
| CN109940167A (en) * | 2018-12-25 | 2019-06-28 | 西安赛隆金属材料有限责任公司 | A kind of rotation electrode fuel pulverizing plant and method |
| 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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