EP0486830A2 - Procédé pour la production des particules métalliques à partir des métaux fondus par atomisation - Google Patents

Procédé pour la production des particules métalliques à partir des métaux fondus par atomisation Download PDF

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Publication number
EP0486830A2
EP0486830A2 EP91118026A EP91118026A EP0486830A2 EP 0486830 A2 EP0486830 A2 EP 0486830A2 EP 91118026 A EP91118026 A EP 91118026A EP 91118026 A EP91118026 A EP 91118026A EP 0486830 A2 EP0486830 A2 EP 0486830A2
Authority
EP
European Patent Office
Prior art keywords
metal
dispensing nozzle
jet
electromagnetic field
cross
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.)
Withdrawn
Application number
EP91118026A
Other languages
German (de)
English (en)
Other versions
EP0486830A3 (en
Inventor
Georg Dr. Reif
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.)
Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co
Original Assignee
Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co
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 Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co filed Critical Eckart Werk Standard Bronzepulver Werke Carl Eckart GmbH and Co
Publication of EP0486830A2 publication Critical patent/EP0486830A2/fr
Publication of EP0486830A3 publication Critical patent/EP0486830A3/de
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention relates to a method for producing metal particles from a molten metal, the molten metal being discharged through a dispensing nozzle as a metal jet and the metal jet downstream of the dispensing nozzle being acted upon in a sputtering zone by a fluid which is passed through a nozzle device and through which the metal jet is sputtered to form the metal particles becomes.
  • the size or grain distribution of the metal particles produced using such a method is, inter alia, on the cross section of the dispensing nozzle, on the pressure with which the molten metal is conveyed through the dispensing nozzle, on the arrangement of the nozzle device in relation to the dispensing nozzle and on other parameters which can be adjustable if necessary in order to be able to adjust the particle size distribution of the metal particles as desired.
  • the ratio of metal dispensed through the dispensing nozzle to fluid passed through and dispensed through the nozzle device is very important here. In order to achieve a very fine grain spectrum, it is necessary to determine the amount of metal dispensed per unit time by the dispensing nozzle, i.e. to decrease the metal flow rate.
  • a clogged dispensing nozzle is unusable. Furthermore, there is a risk of clogging with dispensing nozzles of small cross-section due to non-melt components such as oxide slags or the like located in the molten metal.
  • the invention is therefore based on the object of providing a method of the type mentioned at the outset with which it is possible without problems to produce metal particles of any desired grain spectrum and in particular also of a very fine grain spectrum without problems.
  • the metal beam flows through the electromagnetic field of an electromagnetic field device in the area between the dispensing nozzle and the atomization zone, the cross section of the metal beam being changed by the electromagnetic field in comparison to the starting cross section defined by the dispensing nozzle.
  • the molten metal can therefore leave the dispensing nozzle as a result of the effect of gravity as a laminar metal jet.
  • the method according to the invention has the particular advantage that it can be used to produce metal particles that are present in a very fine grain spectrum because the electromagnetic field-related change in the cross section of the metal beam or, in particular, a reduction in its cross section in the region of the atomization zone, means the metal flow rate in relation to the Atomizing fluid flowing through the nozzle device is correspondingly small, so that the method according to the invention has excellent productivity.
  • the metal jet can be accelerated downstream by means of the electromagnetic field of the electromagnetic field device after the dispensing nozzle, so that the speed of the narrowed metal jet is greater than the cross-sectional ratio of the dispensing nozzle to the constricted metal jet than the flow rate of the metal jet through the dispensing nozzle. It is also possible for the metal beam to be influenced by means of the electromagnetic field of the electromagnetic field device in the dispensing nozzle in such a way that the zone of the metal jet adjacent to the inner surface of the dispensing nozzle is braked in comparison to its central zone. In any case, there is consequently a narrowed metal beam, i.e.
  • the dispensing nozzle can have any cross-sectional shape, i.e. it can have a round, square, oval or any other full or ring cross-section.
  • the metal jet emerging from the dispensing nozzle with a specific cross-section by means of the electromagnetic field device in such a way that the ratio of the cross-sectional area of the restricted metal jet to its circumferential length is increased.
  • This can be realized, for example, in that a metal jet with a circular exit cross section is shaped by the action of the electromagnetic field device in such a way that its cross section forms a flat ellipse before the metal jet enters the atomization zone.
  • the dispensing nozzle can also have larger linear cross-sectional dimensions.
  • the latter dimensions are primarily intended to indicate orders of magnitude; in no way should these dimensions restrict the subject matter of the invention.
  • the restricted metal jet can be acted upon in the atomization zone with a gaseous fluid, which can be air or an inert gas. Any other gaseous fluid can of course also be used.
  • a gaseous fluid which can be air or an inert gas. Any other gaseous fluid can of course also be used.
  • Another possibility is to apply a liquid to the restricted metal jet in the atomization zone.
  • the method according to the invention can be used for all metals which have magnetic properties, so that the molten metal discharged from the dispensing nozzle can be narrowed in the form of a metal beam in the electromagnetic field of the electromagnetic field device arranged in the vicinity of the dispensing nozzle in the manner of a substanceless mold.
  • the electromagnetic field device or the electromagnetic field must therefore be appropriately dimensioned and appropriately oriented in order to narrow the laminar beam of the molten metal accordingly.
  • an aluminum melt or a copper melt is used as the metal melt.
  • other metal melts can also be used, as has already been mentioned.
  • the figure shows sections of a dispensing nozzle 10, which is drawn partially cut away.
  • a metal jet 12 flows through the dispensing nozzle 10 at a speed indicated by the arrow v1.
  • an electromagnetic field device 14 Downstream of the dispensing nozzle 10, an electromagnetic field device 14 is provided, which is arranged coaxially with the dispensing nozzle 10 and which is designed with a passage 16 for the metal jet 12.
  • An electromagnetic field H is given in the passage 16 of the electromagnetic field device 14.
  • the metal jet 12 emerging from the dispensing nozzle 10 is narrowed down to a metal jet 12 ′.
  • the cross section of the dispensing nozzle 10 is designated Q in the drawing and the cross section of the narrowed metal jet 12 ′ is designated q.
  • the cross-section q can correspond in shape to the cross-section Q, i.e. e.g. a circular cross section Q can be reduced to a circular cross section q.
  • the cross section q differs from the cross section Q, i.e.
  • a circular cross section Q can be transformed into an elliptical cross section q.
  • q ⁇ Q.
  • the speed v2 of the narrowed metal jet 12' is greater than the speed v1 of the metal jet 12 when flowing through the dispensing nozzle 10.
  • the speed v2 of the narrowed metal beam 12 is indicated in the drawing like the speed v1 by an arrow.
  • a nozzle device 18 Downstream of the electromagnetic field device 14 there is a nozzle device 18 which is directed against the restricted or reduced metal jet 12 '.
  • a fluid 20 is directed through the nozzle device 18 against the narrowed metal jet 12 ', so that the fluid 20 indicated by arrows acts on the narrowed metal jet 12' and the narrowed metal jet 12 'is atomized into metal particles in the atomization zone 22 defined by the nozzle device 18.
  • the metal particles are then cooled in a cooling zone 24 and can be collected accordingly.
  • the electromagnetic field device 14 thus serves as a substance-free mold in order to appropriately narrow the metal jet 12 emerging from the dispensing nozzle 10.

Landscapes

  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
EP19910118026 1990-11-17 1991-10-23 Process for the atomisation of molten metal to produce metal powders Withdrawn EP0486830A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4036670 1990-11-17
DE4036670 1990-11-17
DE19914105154 DE4105154A1 (de) 1990-11-17 1991-02-20 Verfahren zur herstellung von metallpartikeln aus einer metallschmelze durch verduesung
DE4105154 1991-02-20

Publications (2)

Publication Number Publication Date
EP0486830A2 true EP0486830A2 (fr) 1992-05-27
EP0486830A3 EP0486830A3 (en) 1993-08-18

Family

ID=25898579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910118026 Withdrawn EP0486830A3 (en) 1990-11-17 1991-10-23 Process for the atomisation of molten metal to produce metal powders

Country Status (3)

Country Link
EP (1) EP0486830A3 (fr)
JP (1) JPH06340904A (fr)
DE (1) DE4105154A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2779363A1 (fr) * 1998-06-08 1999-12-10 Bruno Jean Marie Aubert Procede d'acceleration et de guidage de fluides dans un champ electromagnetique. mise en oeuvre sur une lance a incendie pour en augmenter la portee
US7578960B2 (en) 2005-09-22 2009-08-25 Ati Properties, Inc. Apparatus and method for clean, rapidly solidified alloys
US7798199B2 (en) 2007-12-04 2010-09-21 Ati Properties, Inc. Casting apparatus and method
US7803211B2 (en) 2005-09-22 2010-09-28 Ati Properties, Inc. Method and apparatus for producing large diameter superalloy ingots
US7803212B2 (en) 2005-09-22 2010-09-28 Ati Properties, Inc. Apparatus and method for clean, rapidly solidified alloys
US8642916B2 (en) 2007-03-30 2014-02-04 Ati Properties, Inc. Melting furnace including wire-discharge ion plasma electron emitter
US8748773B2 (en) 2007-03-30 2014-06-10 Ati Properties, Inc. Ion plasma electron emitters for a melting furnace
US8747956B2 (en) 2011-08-11 2014-06-10 Ati Properties, Inc. Processes, systems, and apparatus for forming products from atomized metals and alloys
US8891583B2 (en) 2000-11-15 2014-11-18 Ati Properties, Inc. Refining and casting apparatus and method
US9008148B2 (en) 2000-11-15 2015-04-14 Ati Properties, Inc. Refining and casting apparatus and method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013105369B4 (de) * 2013-05-24 2020-11-19 BinNova GmbH & Co. KG Verfahren und Vorrichtung zur Herstellung mikrofeiner Fasern und Filamente
KR101607001B1 (ko) * 2014-07-31 2016-03-28 현대제철 주식회사 턴디쉬용 노즐 유닛 및 이를 갖는 수분사 철계 분말 제조 장치
CN113102762A (zh) * 2021-04-09 2021-07-13 上海大学 一种金属粉末的制备方法及装置
CN114939666A (zh) * 2022-07-25 2022-08-26 浙江亚通焊材有限公司 一种气雾化法制备金属粉末的粒径控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021889A1 (fr) * 1979-05-31 1981-01-07 ANVAR Agence Nationale de Valorisation de la Recherche Procédé pour réaliser le confinement des métaux liquides par mise en oeuvre d'un champ électromagnétique
US4762553A (en) * 1987-04-24 1988-08-09 The United States Of America As Represented By The Secretary Of The Air Force Method for making rapidly solidified powder
EP0362530A1 (fr) * 1988-09-02 1990-04-11 Leybold Aktiengesellschaft Procédé et dispositif de carlée verticale de métaux
EP0408453A1 (fr) * 1989-07-12 1991-01-16 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Dispositif de busette électro-magnétique pour le contrôle d'un jet de metal liquide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021889A1 (fr) * 1979-05-31 1981-01-07 ANVAR Agence Nationale de Valorisation de la Recherche Procédé pour réaliser le confinement des métaux liquides par mise en oeuvre d'un champ électromagnétique
US4762553A (en) * 1987-04-24 1988-08-09 The United States Of America As Represented By The Secretary Of The Air Force Method for making rapidly solidified powder
EP0362530A1 (fr) * 1988-09-02 1990-04-11 Leybold Aktiengesellschaft Procédé et dispositif de carlée verticale de métaux
EP0408453A1 (fr) * 1989-07-12 1991-01-16 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Dispositif de busette électro-magnétique pour le contrôle d'un jet de metal liquide

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2779363A1 (fr) * 1998-06-08 1999-12-10 Bruno Jean Marie Aubert Procede d'acceleration et de guidage de fluides dans un champ electromagnetique. mise en oeuvre sur une lance a incendie pour en augmenter la portee
US10232434B2 (en) 2000-11-15 2019-03-19 Ati Properties Llc Refining and casting apparatus and method
US9008148B2 (en) 2000-11-15 2015-04-14 Ati Properties, Inc. Refining and casting apparatus and method
US8891583B2 (en) 2000-11-15 2014-11-18 Ati Properties, Inc. Refining and casting apparatus and method
US8221676B2 (en) 2005-09-22 2012-07-17 Ati Properties, Inc. Apparatus and method for clean, rapidly solidified alloys
US7803211B2 (en) 2005-09-22 2010-09-28 Ati Properties, Inc. Method and apparatus for producing large diameter superalloy ingots
US7578960B2 (en) 2005-09-22 2009-08-25 Ati Properties, Inc. Apparatus and method for clean, rapidly solidified alloys
US8216339B2 (en) 2005-09-22 2012-07-10 Ati Properties, Inc. Apparatus and method for clean, rapidly solidified alloys
US7803212B2 (en) 2005-09-22 2010-09-28 Ati Properties, Inc. Apparatus and method for clean, rapidly solidified alloys
US8226884B2 (en) 2005-09-22 2012-07-24 Ati Properties, Inc. Method and apparatus for producing large diameter superalloy ingots
US8642916B2 (en) 2007-03-30 2014-02-04 Ati Properties, Inc. Melting furnace including wire-discharge ion plasma electron emitter
US8748773B2 (en) 2007-03-30 2014-06-10 Ati Properties, Inc. Ion plasma electron emitters for a melting furnace
US9453681B2 (en) 2007-03-30 2016-09-27 Ati Properties Llc Melting furnace including wire-discharge ion plasma electron emitter
US8302661B2 (en) 2007-12-04 2012-11-06 Ati Properties, Inc. Casting apparatus and method
US7963314B2 (en) 2007-12-04 2011-06-21 Ati Properties, Inc. Casting apparatus and method
US7798199B2 (en) 2007-12-04 2010-09-21 Ati Properties, Inc. Casting apparatus and method
US8156996B2 (en) 2007-12-04 2012-04-17 Ati Properties, Inc. Casting apparatus and method
US8747956B2 (en) 2011-08-11 2014-06-10 Ati Properties, Inc. Processes, systems, and apparatus for forming products from atomized metals and alloys

Also Published As

Publication number Publication date
JPH06340904A (ja) 1994-12-13
EP0486830A3 (en) 1993-08-18
DE4105154A1 (de) 1992-05-21

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