EP3983157A1 - Procédé et dispositif pour fragmenter un liquide électroconducteur - Google Patents

Procédé et dispositif pour fragmenter un liquide électroconducteur

Info

Publication number
EP3983157A1
EP3983157A1 EP20757855.0A EP20757855A EP3983157A1 EP 3983157 A1 EP3983157 A1 EP 3983157A1 EP 20757855 A EP20757855 A EP 20757855A EP 3983157 A1 EP3983157 A1 EP 3983157A1
Authority
EP
European Patent Office
Prior art keywords
liquid jet
liquid
jet
inert gas
mhz
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20757855.0A
Other languages
German (de)
English (en)
Inventor
Henrik Franz
Sergejs SPITANS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALD Vacuum Technologies GmbH
Original Assignee
ALD Vacuum Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ALD Vacuum Technologies GmbH filed Critical ALD Vacuum Technologies GmbH
Publication of EP3983157A1 publication Critical patent/EP3983157A1/fr
Pending legal-status Critical Current

Links

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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0836—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with electric or magnetic field or induction
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/084—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid combination of methods
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0844—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid in controlled atmosphere
    • 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

Definitions

  • the present invention relates to a method and a device for dividing, i.e. for atomizing or atomizing, an electrically conductive liquid.
  • the atomizing or atomizing of the electrically conductive liquid serves to break up the electrically conductive liquid into microdrops.
  • the method according to the invention and the device according to the invention can be used for producing high-purity spherical metal powders by atomizing or atomizing a melt jet.
  • Methods and devices known from the prior art for generating atomized microdroplets are often based on inert gas atomization of a liquid or liquefied material.
  • these processes are known in particular from the field of metal powder production.
  • a melt jet of a metal or metal alloy melt is provided and atomized by means of an inert gas applied through an inert gas nozzle.
  • a disadvantage of such metal powder production processes is the high consumption of inert gas and the associated high operating costs.
  • one object of the invention is to provide a method and a device for dividing an electrically conductive liquid, in particular a melt jet, which enable a reduction in operating costs.
  • the method according to the invention for dividing an electrically conductive liquid, in particular a melt jet comprises the step of providing the electrically conductive liquid, which moves in a first direction in the form of a liquid jet.
  • dividing denotes the atomization or atomization of the electrically conductive liquid.
  • the liquid jet here refers to a continuous liquid jet or at least a series of liquid drops in close succession.
  • the liquid jet moves essentially along a jet media axis of the liquid jet in the first direction.
  • the electrically conductive liquid can be a metal or metal alloy melt which is provided in the form of a melt jet.
  • the method according to the invention and the device according to the invention are not limited to the atomization of molten metal, but can be used to atomize any electrically conductive liquid which can be influenced by means of traveling electromagnetic fields.
  • a further step of the method according to the invention is the generation of high-frequency traveling electromagnetic fields surrounding the liquid jet, which migrate in the first direction and accelerate the liquid jet in the first direction, whereby the liquid jet is atomized.
  • the high-frequency electromagnetic traveling fields migrating in the first direction can accelerate outer layers of the liquid jet more strongly than inner layers of the liquid jet due to their arrangement circumferentially around the liquid jet.
  • the high-frequency traveling electromagnetic fields namely generate Lorentz forces strong tangential components in the outer layers of the liquid jet, which in particular and essentially accelerate the outer layers.
  • This results in a critical speed profile with a large speed gradient in the liquid jet which can be represented in longitudinal section as a U-shaped speed profile in the liquid jet.
  • a speed profile of a laminar pipe flow can be essentially reversed into the U-shaped speed profile.
  • the pressure within the liquid jet is increased abruptly or suddenly compared to a pressure surrounding the liquid jet, so that the liquid jet disintegrates or is atomized / atomized due to the pressure difference.
  • the atomization or atomization leads to a breakdown of the liquid jet into ligaments and thus generates the desired microparticles.
  • the liquid jet can also overheat.
  • the method according to the invention allows a homogeneous liquid jet, for example a melt jet, to be atomized by means of high frequency traveling electromagnetic fields. No inert gas to be introduced is required for this, which means that the operating costs of the process can be reduced.
  • the high-frequency electromagnetic traveling fields can have an alternating current frequency of at least 0.1 MHz, preferably at least 1 MHz, more preferably of at least 10 MHz, even more preferably of at least 100 MHz.
  • the traveling electromagnetic fields can have an alternating current frequency between 0.1 MHz and 100 MHz.
  • the alternating current frequency can be adjustable in accordance with the further process parameters, in particular as a function of the material of the liquid jet to be atomized and / or the size of the microparticles or microdrops to be generated.
  • the high-frequency electromagnetic traveling fields can be generated by means of a coil arrangement with at least one pole pair, preferably with a plurality of pole pairs.
  • the coil arrangement can comprise at least two pole pairs, more preferably with at least three pole pairs, even more preferably at least four or more pool pairs.
  • the pole pairs can each be arranged from along the beam center axis parallel to the neigh barten pole pairs.
  • the coil arrangement can be controlled in such a way that the high-frequency electromagnetic traveling fields migrate in the first direction, i.e. that they essentially move in the first direction.
  • a further step of the method can be the generation of a gas flow surrounding the liquid jet, which flows essentially in the first direction and additionally accelerates the liquid jet in the first direction.
  • Inert gas for example argon
  • the gas can have a high pressure, for example between 0 Pa and 10 MPa, preferably between 0.1 MPa and 5 MPa.
  • the gas flow can be generated by means of an inert gas nozzle.
  • the gas flow can act on the liquid jet in the form of a superimposed acceleration in addition to and together with the high-frequency traveling electromagnetic fields.
  • the gas flow can accelerate the liquid jet at the same time, temporally and / or spatially before and / or temporally and / or spatially after the coil arrangement.
  • the gas flow acts on the liquid jet via shear stresses.
  • the critical speed profile (U-speed profile) and thus the high internal pressure in the liquid jet is established by means of the high-frequency electromagnetic traveling fields and by means of the gas flow, whereby the liquid jet is effectively atomized.
  • the gas consumption can also be reduced in this exemplary embodiment compared to conventional atomization methods, since the atomization is not caused solely by the gas flow, but together with the electromagnetic Wanderfel countries.
  • the inert gas nozzle can be a Laval nozzle.
  • the high-frequency traveling electromagnetic fields can be generated by means of a coil arrangement integrated into the inert gas nozzle.
  • the liquid jet can be accelerated essentially simultaneously by means of the gas flow and by means of the high-frequency traveling electromagnetic fields.
  • the high-frequency traveling electromagnetic fields can be generated by means of a coil arrangement upstream or downstream along the central axis of the beam of the inert gas nozzle.
  • the accelerations of the liquid jet due to the high-frequency traveling electromagnetic fields and the gas flow act at least partially in succession on the liquid jet or the at least partially already atomized liquid jet.
  • the liquid jet can be atomized by means of a further gas flow introduced via an annular nozzle.
  • This further gas flow can act in a pulsed or impact-like manner on the liquid jet or the at least partially already atomized liquid jet.
  • Inert gas for example argon, can also be used as the gas for this purpose.
  • the ring nozzle can be positioned downstream of the coil arrangement, viewed along the blasting center axis.
  • the ring nozzle can be positioned downstream of the inert gas nozzle when viewed along the blast center axis.
  • the method can in particular be an EIGA method (EIGA, English: “Electrode Induction Melting (Inert) Gas Atomization”) or it can be used in an EIGA method.
  • the process can be a VIGA process (VIGA, “Vacuum Induction Melting combined with Inert Gas Atomization”), a PIGA process (PIGA, “Plasma Melting Induction Guiding Gas Atomization”), a CCIM process (CCIM, English: “Cold Crucible Induction Melting”) or another process for powder production.
  • the liquid jet can in particular be generated by melting a vertically suspended, rotating electrode by means of a conical induction coil.
  • the electrode can be shifted continuously in the direction of the induction coil in order to be melted on or off without contact.
  • the rotational movement of the electrode around its own longitudinal axis can ensure that the electrode melts evenly.
  • the melting of the electrode and the atomization of the melt jet generated thereby can take place under vacuum or under an inert gas atmosphere in order to avoid undesired reactions of the melted material, for example with oxygen.
  • the EIGA process can be used for the ceramic-free production of high-purity metal or precious metal powders. such as for the production of powders from titanium, zirconium, niobium and tantalum alloys.
  • the method can also include the step of cooling the atomized liquid jet in order to generate solidified, in particular spherical, particles.
  • the cooling can take place under local cooling conditions.
  • the cooling down can also be actively influenced by a cooling device integrated in a collecting container.
  • the device comprises a liquid source for providing a liquid jet of the electrically conductive liquid moving in a first direction and a coil arrangement with at least one pole pair, which is located downstream of the liquid source in relation to the direction of movement of the liquid jet and in relation to a jet center axis coaxially to the liquid jet is arranged.
  • the coil arrangement is designed to generate high-frequency electromagnetic traveling fields that surround the liquid jet and migrate in the first direction in order to accelerate the liquid jet by means of the high-frequency electromagnetic traveling fields in the first direction and thereby atomize the liquid jet.
  • the device can be set up to carry out the method described above for dividing the electrically conductive liquid.
  • the coil arrangement for generating the high-frequency electromagnetic traveling fields can comprise my plurality of pole pairs.
  • the coil arrangement can comprise at least two pole pairs, more preferably with at least three pole pairs, even more preferably at least four or more pool pairs.
  • the pole pairs of a plurality of pole pairs can each be arranged from along the beam center axis of the liquid jet parallel to the adjacent pole pairs.
  • the coil arrangement can be controllable in such a way that the high-frequency electromagnetic traveling fields migrate at a predetermined speed in the first direction, i.e. that they essentially move at the predetermined speed in the first direction.
  • the high-frequency electromagnetic traveling fields can have an alternating current frequency of at least 0.1 MHz, preferably at least 1 MHz, more preferably of at least 10 MHz, even more preferably of at least 100 MHz.
  • the traveling electromagnetic fields can have an alternating current frequency between 0.1 MHz and 100 MHz.
  • the alternating current frequency can according to the further process parameters can be set or adjustable, in particular as a function of the material of the liquid jet to be atomized and / or the size of the microparticles or microdrops to be generated.
  • the device can comprise an inert gas nozzle which is designed to generate a gas flow surrounding the liquid jet and moving essentially in the first direction in order to additionally accelerate the liquid jet by means of the gas flow in the first direction.
  • the gas stream can be an inert gas stream, argon, for example, being used as the inert gas.
  • the gas flow can be generated by means of an inert gas nozzle in the form of a Laval nozzle.
  • the coil arrangement can be arranged or integrated in the inert gas nozzle.
  • the coil arrangement and the inert gas nozzle can be arranged coaxially to one another.
  • the liquid jet can be accelerated essentially simultaneously by means of the gas flow and by means of the high-frequency traveling electromagnetic fields.
  • the coil arrangement can be upstream or downstream of the inert gas nozzle when viewed along the blasting center axis.
  • the accelerations of the liquid jet due to the high-frequency traveling electromagnetic fields and the gas flow act at least partially in succession on the liquid jet or the at least partially already atomized liquid jet.
  • the gas flow can act on the liquid jet in addition to and together with the high-frequency electromagnetic traveling fields.
  • the critical velocity profile in the liquid jet can be adjusted by means of the high-frequency electromagnetic traveling fields and by means of the gas flow in order to effectively atomize the liquid jet.
  • the gas consumption can also be reduced in this embodiment compared to conventional atomization devices, since the atomization cannot be brought about by the gas flow alone, but together with the electromagnetic traveling fields.
  • the device can comprise an annular nozzle, the annular nozzle being set up to additionally atomize the liquid jet by means of a further gas flow introduced via the annular nozzle.
  • the ring nozzle can be set up to apply the liquid jet or the at least partially already atomized liquid jet by means of a pulse-like action on the liquid jet or the at least partially already atomized liquid. to continue atomizing the jet of water.
  • Inert gas for example argon, can also be used for this purpose.
  • the ring nozzle can be positioned downstream of the coil structure when viewed along the blasting center axis.
  • the ring nozzle can be positioned downstream of the inert gas nozzle when viewed along the blasting center axis.
  • these two nozzles can be formed in a nozzle arrangement.
  • the nozzle arrangement can be in one piece.
  • the interplay and the settings of the coil arrangement, the inert gas nozzle and the annular nozzle can influence the quality and / or the particle size of the powder to be produced.
  • the liquid source can be a melt jet source, in particular in the form of an electrode.
  • the liquid jet can be a melt jet made of melted electrode material.
  • the electrode can be a vertically suspended, rotatable electrode.
  • the electrode can comprise or consist of: titanium, a titanium alloy, an alloy based on zirconium, niobium, nickel or tantalum, a noble metal or a noble metal alloy, a copper or aluminum alloy, a special metal or a special metal alloy.
  • the electrode can have a diameter of more than 50 mm and up to 150 mm and a length of more than 500 mm and up to 1000 mm.
  • the device can comprise a conical induction coil which is arranged coaxially to the electrode and in the region of a lower end of the electrode and is designed to melt the electrode in order to generate the melt jet.
  • the electrode can be continuously displaceable in the direction of the induction coil.
  • the electrode and the induction coil can be arranged in a housing acted upon by vacuum or an inert gas atmosphere.
  • the device can comprise an atomization tower for cooling and solidifying the atomized liquid jet.
  • This atomization tower can be connected to the housing and also have a vacuum or an inert gas atmosphere applied to it.
  • the coil arrangement and, if present, the inert gas nozzle can also be arranged in the housing in the area of the connection to the atomization tower.
  • the atomization tower can be provided with a cooling device in order to actively cool the atomized liquid jet and thus to specifically influence the particle formation.
  • the device can be an EIGA system or it can be installed in an EIGA system. Although some aspects and features have only been described with reference to the method according to the invention, these can apply accordingly to the device and further developments and vice versa.
  • Fig. 1 is a schematic representation of the operation of the method according to the invention.
  • FIG. 2 shows a schematic representation of the mode of operation of a method of atomization by means of a Laval nozzle.
  • Fig. 3 shows a schematic representation of the functioning of the method according to the invention in an EIGA method.
  • the liquid jet 10 is an essentially continuous melt jet of a metal melt.
  • the liquid jet 10 moves starting from a liquid source (not shown) in a first direction 12 along its jet center axis A. In the illustration shown in FIG. 1, the liquid jet 10 falls from top to bottom due to the force of gravity.
  • the liquid jet 10 passes through a device 20 according to the invention for atomizing the liquid jet 10.
  • the device 20 comprises a coil arrangement 22 with three pole pairs 24A, 24B, 24C. It goes without saying that the coil arrangement in alternative exemplary embodiments can have more or fewer than three pole pairs.
  • the coil arrangement 22 is arranged downstream of the liquid source, not shown, as viewed in the direction of movement, and the windings are arranged parallel to one another and coaxially to the liquid jet 10.
  • the individual pole pairs 24A, 24B, 24C can be controlled one after the other in such a way that phase changes cp and, as a result, high-frequency electromagnetic traveling fields are generated.
  • the sequence of the phase change cp is exemplified by the numbering fi, y2, q> 3 shown.
  • the high-frequency electromagnetic traveling fields can for example have an alternating current frequency between 0.1 and 100 MHz.
  • the high-frequency traveling electromagnetic fields move due to the phase change cp, also in the first direction 12.
  • Lorentz forces 26 generated by the high-frequency traveling electromagnetic fields act with strong tangential components essentially on outer layers of the liquid jet 10 and accelerate them additionally in the first direction 12.
  • the microparticles can, for example, have an average particle size or an average particle diameter dso between 20 ⁇ m and 100 ⁇ m.
  • Fig. 2 shows a section of a melt jet 110 of a metal melt in a longitudinal section.
  • the liquid jet 110 is atomized by means of an inert gas atomization method or Laval atomization.
  • the melt jet 110 passes through an opening of an inert gas nozzle 120 in order to reach an atomization tower (not shown).
  • the critical velocity profile in the melt jet 110 in the method shown in FIG. 2 is generated by means of an inert gas flow 122.
  • the inert gas stream 122 flows through the inert gas nozzle 120 at a high speed v g into the atomization tower. Since the melt jet 110 passes through the center of the inert gas nozzle 120, the inert gas stream 122 surrounds the melt jet 110 and acts on the outer layers of the melt jet 110 via shear stresses. The outer layers of the melt jet 110 are thereby accelerated more strongly in the first direction 12 than inner layers of the melt jet 110. As a result, a critical velocity profile 128 is generated within the melt jet 110 and a speed profile occurs Atomization of the melt jet 110 after exiting the inert gas nozzle 120 or after entering the connected atomization tower.
  • Fig. 3 shows a schematic representation of the functioning of the method according to the invention in an EIGA method or a section of a sectional view of the device 20 according to the invention in an EIGA system 200.
  • the same components and features have the same reference numerals as in FIG Mistake.
  • FIG. 3 thus shows an embodiment of the invention which comprises a combination of the methods shown in FIGS. 1 and 2. This results in surprising synergy effects which can lead to further improved atomization.
  • the coil arrangement 22 and the inert gas nozzle 30 are arranged coaxially to one another, the coil arrangement 22 enclosing the inert gas nozzle 30 or the interior of the inert gas nozzle 30.
  • An inert gas stream 32 flows over the inert gas nozzle 30, which accelerates the liquid jet 10 consisting of several successive drops in a laminar manner (analogous to FIG. 2). This laminar acceleration through the inert gas nozzle 30 or through the gas flow 32 (analogous to FIG. 2) is superimposed by an electromagnetic acceleration of the electrically conductive liquid jet 10 by the coil arrangement 22 (analogous to FIG. 1).
  • Both accelerations act together on the liquid jet 10 in such a way that the water is accelerated in the first direction 12.
  • These superimposed accelerations cause the formation of a critical, U-shaped speed profile in the liquid jet 10, corresponding to the speed profiles of Figures 1 and 2.
  • the resulting large speed gradient within the liquid jet 10 increases the pressure within the liquid jet 10, causing it to a large pressure difference between the high pressure within the liquid jet 10 and the liquid jet surrounding, much lower pressure comes. Due to the pressure difference, the liquid jet 10 breaks up into ligaments, that is to say the liquid jet 10 is atomized into microparticles.
  • the liquid jet 10 is generated by the so-called EIGA method.
  • an EIGA coil 40 or an induction coil 40 is placed in front of the arrangement comprising coil arrangement 22 and inert gas nozzle 30.
  • the induction coil 40 is arranged coaxially to the coil arrangement 22 and the inert gas nozzle 30.
  • the induction coil 40 is seen in the first direction 12 tapering, ie it has a decreasing diameter seen in the first direction 12.
  • An electrode 42 is provided coaxially to the induction coil 40 and upstream of it at least in sections and is melted off by means of the induction coil 40 in order to generate the liquid jet 10.
  • the electrode shown can for example consist of titanium, a titanium alloy, an alloy based on zirconium, niobium, nickel or tantalum, a noble metal or a noble metal alloy, a copper or aluminum alloy, a special metal or a special metal alloy.
  • the electrode 42 is suspended from an upper end (not shown) and axially displaceable in the first direction, that is to say in the direction of the arrangement of Spulenan arrangement 22 and inert gas nozzle 30. Thus, the electrode 42 can be continuously adjusted while the electrode 42 is melting.
  • Downstream of the arrangement of coil arrangement 22 and inert gas nozzle 30 is an annular nozzle 50, via which a further inert gas stream 52 can be introduced into the overall arrangement.
  • the further inert gas stream 52 hits the liquid jet 10 emerging from the arrangement of coil arrangement 22 and inert gas nozzle 30 in a pulsed or impact-like manner.
  • the exiting liquid jet 10 can already be at least partially atomized when the further inert gas stream 52 hits the ring nozzle 50.
  • this is atomized further.
  • the coil arrangement 22, the inert gas nozzle (Laval nozzle) 30 and the ring nozzle 50 can be designed in the form of a common device 20.
  • the device 20 can, for example, be in one piece.
  • the overall arrangement shown in Fig. 3 can be followed by an atomization tower for cooling and solidifying the atomized liquid jet, which is only indicated here and not shown in full.
  • the atomization tower can comprise a collecting container for collecting the solidified powder.

Landscapes

  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

L'invention concerne un procédé pour fragmenter un liquide électroconducteur, en particulier un jet fondu, qui comprend les étapes consistant à : fournir le liquide électroconducteur, qui se déplace dans une première direction (12) sous la forme d'un jet de liquide (10) ; et générer les champs de déplacement électromagnétiques à haute fréquence entourant le jet de liquide (10), qui se déplacent dans la première direction (12) et accélèrent le jet de liquide (10) dans la première direction (12), le jet de liquide (10) est ainsi atomisé.
EP20757855.0A 2019-08-15 2020-08-12 Procédé et dispositif pour fragmenter un liquide électroconducteur Pending EP3983157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019122000.9A DE102019122000A1 (de) 2019-08-15 2019-08-15 Verfahren und Vorrichtung zum Zerteilen einer elektrisch leitfähigen Flüssigkeit
PCT/EP2020/072636 WO2021028477A1 (fr) 2019-08-15 2020-08-12 Procédé et dispositif pour fragmenter un liquide électroconducteur

Publications (1)

Publication Number Publication Date
EP3983157A1 true EP3983157A1 (fr) 2022-04-20

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Country Status (8)

Country Link
US (1) US11919089B2 (fr)
EP (1) EP3983157A1 (fr)
JP (1) JP2022544669A (fr)
CN (1) CN114245762A (fr)
AU (1) AU2020328173A1 (fr)
DE (1) DE102019122000A1 (fr)
TW (1) TW202112469A (fr)
WO (1) WO2021028477A1 (fr)

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DE102021112151A1 (de) 2021-05-10 2022-11-10 Ald Vacuum Technologies Gmbh Vorrichtung und Verfahren zum Herstellen von Metallpulver unter Verwendung einer Induktions- und einer Zwischenspule
CN113547126A (zh) * 2021-06-29 2021-10-26 鞍钢股份有限公司 一种防止导流管堵塞的紧密耦合气雾化制细粉方法
CN116613052B (zh) * 2023-07-19 2023-12-19 杭州凯莱谱质造科技有限公司 一种设置有外加磁场的电喷雾离子源及质谱仪

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US11919089B2 (en) 2024-03-05
CN114245762A (zh) 2022-03-25
US20220410264A1 (en) 2022-12-29
AU2020328173A1 (en) 2022-02-03
WO2021028477A1 (fr) 2021-02-18
JP2022544669A (ja) 2022-10-20
DE102019122000A1 (de) 2021-02-18

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