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EP2421997B1 - Production de particules métalliques arrondies - Google Patents

Production de particules métalliques arrondies Download PDF

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Publication number
EP2421997B1
EP2421997B1 EP10745842.4A EP10745842A EP2421997B1 EP 2421997 B1 EP2421997 B1 EP 2421997B1 EP 10745842 A EP10745842 A EP 10745842A EP 2421997 B1 EP2421997 B1 EP 2421997B1
Authority
EP
European Patent Office
Prior art keywords
molten mass
particles
granulation
melt
molten
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.)
Not-in-force
Application number
EP10745842.4A
Other languages
German (de)
English (en)
Other versions
EP2421997A2 (fr
Inventor
Harald Eibisch
Michael Grimm
Mathias Gruber
Mark Hartmann
Andreas Lohmüller
Michael Loos
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.)
Non Ferrum GmbH
Original Assignee
Non Ferrum 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 Non Ferrum GmbH filed Critical Non Ferrum GmbH
Publication of EP2421997A2 publication Critical patent/EP2421997A2/fr
Application granted granted Critical
Publication of EP2421997B1 publication Critical patent/EP2421997B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/065—Spherical particles
    • 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
    • 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
    • B22F2009/0896—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 particle transport, separation: process and apparatus

Definitions

  • the invention relates to a device for producing roundish metal particles of high size and shape uniformity; Process for producing roundish metal particles of high size and shape uniformity and the use of the method.
  • the granulate particles produced in this way are particularly suitable, for example, for applications in which a particular flowability of the granulate is desired as far as possible without the formation of abrasion or particles of smaller particle size, as in thixomolding.
  • a mechanical granulating apparatus or cutting apparatus can produce particles of fine structure, but it lacks the roundness, which causes a low internal friction of the granules in the dumping, conveying and pressing. Such particles often have poor uniformity of grain size and grain shape, and of course are not spheroidal. Furthermore, it is complicated, if not impossible, to produce granules with as large a grain as possible by mechanical granulation. Finally, the process itself is expensive, since the mechanical machining of billets and the like. Is expensive and much remains unzerspantes residual material that must be returned to the casting process. Also, metal granules produced by the cutting process generally suffer from uneven composition in general since irregularities such as inclusions are transferred from the billet to the powder.
  • the spheres produced by melting form a substantially finer grain structure compared to the particles produced from pulverized cast masses, which has proven to be advantageous in particular in metal injection molding ( Czerwinski F .; Materials Science and Engineering A 367, 2004, pp. 261-271 ).
  • Conventional turntable devices for making metal spheres include means for melting the metal and casting the metal on a rotating base which tosses the molten metal to form spheroidal particles. S. for example. JP 51-64456 . JP 07-179912 . JP 63-33508 JP 07054019 and JP 07-173510 , Such typical rotary disc devices produce spheroidal powders of relatively poor sphericity, limited micro dimensions, and improved uniformity of composition and shape.
  • molten metal is conveyed from a melting furnace in a granulating tube (5) to melt outlet openings (16) in a granulation chamber (20). Furthermore, the device has a granulating turntable (1) below the granulating tube (5), which has at least one outlet for a molten metal jet on the turntable (1), wherein the rotating turntable (1) from the at least one outlet of the granulating tube (5 dripping molten metal in the form of roundish droplets. The melt drops solidify on the cold surface of the turntable to granules particles (12).
  • An inert gas supply means (15) supplies specially selected gas to the molten metal discharged from the melt outlets (16) into a granulation chamber (20) in a manner preventing contact of the molten metal jet with air and oxidation of the metal.
  • the gas supply can be done in countercurrent, perpendicular to the melt jet and obliquely to parallel to the melt jet. Possibly. a pulsating upward and downward movement of the granulating tube (5) for separating the melt jet into drops can be provided.
  • the granulating turntable (1) is cooled.
  • the granulation tube (5) has a blind flange in one embodiment.
  • a high pressure can easily be built up and the melt is applied as quickly as possible.
  • the granulating tube (5) is returned to the melting furnace (3), whereby a regular mixing of the melt and high reproducibility of the particle composition is ensured.
  • a feed pump in / on the melting furnace (3) for conveying the molten metal to / in the granulation (5) is provided.
  • Typical metals which are processed by the granulation method according to the invention for high reactivity in the melt are selected from the group consisting of Al, Mg, Ca, Zn and their alloys - but the method can also be used for other metals.
  • the cooling of the dispersed droplets by gas is advantageously accomplished by means of a predetermined cooling gas of one or more inert gases in an open or closed granulation chamber 20 which provides the controlled atmosphere.
  • spherical particles of fine grain structure of high shape and size uniformity from the melt is possible.
  • Such particles having a fine grain structure are particularly suitable for applications such as thixomolding, sintering, metal injection molding and similar powder metallurgy processes.
  • the inventive method is particularly suitable for the production of granules of magnesium or magnesium alloys.
  • metal also refers to their respective alloys as well as the metal with minor impurities.
  • spheroid any round shape, such as, for example, balls, lens shapes, elliptical shapes, etc., which has no sharp or angular edges.
  • the access of reacting with the melt gases such as water vapor, oxygen, nitrogen is avoided as possible.
  • the melting takes place under a protective cover or protective atmosphere and the transport of the melt through a closed pipe system to the outlet openings or nozzles.
  • a wide variety of gases either inert or reactive gas, such as mixtures of dry air, nitrogen or carbon dioxide with sulfur dioxide, sulfur hexafluoride or R134a, above the melt, resulting in the formation of a protective layer on the melt surface.
  • gases either inert or reactive gas, such as mixtures of dry air, nitrogen or carbon dioxide with sulfur dioxide, sulfur hexafluoride or R134a, above the melt, resulting in the formation of a protective layer on the melt surface.
  • the transport tube the molten metal from the melting furnace for Promotes sputtering station, is heated to prevent deposition of magnesium or its compounds by convection in the heat transfer tube, while ensuring the most uniform possible heat distribution in the longitudinal direction of the tube. Corresponding measures are familiar to the person skilled in the art.
  • the melt can be circulated, whereby a constant return does not take place on the turntable ejected melt in the furnace and thus a permanent mixing of the melt volume is achieved while maintaining a high homogeneity of the product and a homogeneous temperature distribution.
  • the high flow velocity in the pipe is advantageous, so that impurities (eg oxides) are permanently transported, are not deposited in the pipe and clog it from the inside.
  • the pipe itself can be heated over the whole area or only over part of the area, for example only in the lower area, in order to increase the convection there and to avoid settling of reaction products of the melt.
  • the shape and size of the particles are influenced inter alia by density, viscosity, surface tension and diameter of the jet emerging from the discharge opening (nozzle diameter, nozzle material).
  • the particle size variation in the method according to the invention is low, which can only be achieved in the case of machining processes by means of expensive further sieving / sifting operations.
  • Adjusting the relationships between devices and methods according to the invention enables the production of relatively round, spheroidal, ellipsoidal or lenticular particles of various sizes and various applicability, such as in sintering, thixomolding (metal injection molding), pressing, etc.
  • the invention provides methods, devices and systems for producing granular particles of uniform spheroidal shape and high sphericity consisting of metal and its alloys by use of an improved rotating disc apparatus.
  • Fig. 1 is schematically illustrated the system of the invention.
  • melt 6 is fed into the granulating tube 5 with nozzles 16 by means of a feed pump 2.
  • the melt exits the nozzles 16 into the inert gas-filled granulation chamber 20 and forms drops 8.
  • the drops fall on the turntable 1, solidify to particles 12 and are passed through a scraper 13 in a container 2.
  • Inert gas 14 is passed through lines 15 to the emerging from the nozzle 16 melt, which prevents the formation of oxides, nitrides and the like to the nozzle 16 of the granulation tube 5 and the granules, and promotes the disintegration of the melt jet to 8 drops.
  • FIG. 3 schematically shows various embodiments of the course of the granulation tube 5.
  • a granulator with return 7 is shown.
  • a pump P is arranged, which ensures regular promotion of the melt.
  • the return of non-discharged melt through the return pipe 7 in the furnace is apparent.
  • a non-return embodiment in which the granulation tube 5 terminates in a blind flange is shown.
  • a pump P which pressure in the granulating tube 5 can build up for faster deployment of the melt and also pressure surges, for example.
  • Fig. 4 shows various granules from a plant according to the invention. Clearly here is a roundish lens shape of the present invention produced from the melt Mg granules visible.
  • FIG. 2a shows a light micrograph of the microstructure of a step by a melt produced according to the invention particles of magnesium alloy AZ91 and Fig. 2b the microstructure of a particle made from Gußmasseln particles of the same alloy. It is clearly evident that the particles produced from the melt solidify rapidly and thus have a remarkably fine grain according to the invention, whereby their mechanical properties are favorably influenced.
  • the invention provides methods, devices and systems for producing metal granules wherein the particles have a uniform spheroidal shape - such as Fig. 4 seen.
  • At least one jet of molten metal which has been broken down into droplets, is directed onto a rotating dish.
  • the molten steel is supplied with inert gas, here predominantly helium.
  • a bell made of baffles below the Granulierrohres prevented as a granulation chamber outflow of the protective gas and maintains an atmosphere that prevents oxidation of the exiting the nozzle melt, upright.
  • the droplets hit the cold, preferably cooled turntable.
  • the turntable removes heat from the melt droplet so quickly that a rapid solidification of the melt results in a granular particle with a fine-grained microstructure.
  • the rotational movement of the plate prevents the melting droplets from meeting / coalescing, thus ensuring solidification of the droplets into discrete particles.
  • the particles are pushed here by the trained here as a strip scraper over the edge of the plate in a container. Also conceivable are other means for removing the solidified particles such as brushes, blowers, etc.
  • the pressure in the granulation tube 5 is generated in this embodiment by a centrifugal pump.
  • a centrifugal pump In general, all known pumping methods and systems for building up the melt pressure or the melt flow in the pouring tube suitable, such as piston pumps, induction pumps, pneumatic pumping systems, but also for pressurizing the furnace chamber and pump-free delivery systems, which work, for example, on the principle of communicating tubes can be used.
  • the shape and size of the granulate particles can be influenced by various system parameters. These include, inter alia, the distance of the pouring tube to the turntable so the drop height of emerging from the nozzle melt; the nozzle diameter, the melt pressure, the melt temperature and the design of the granulation tube (with or without return). In addition, determine temperature, flow velocity, composition and angle of attack of the protective gas and the temperature of the turntable, the shape and size of the granular particles. Depending on the combination of parameters, the particle shape is different spheroid z. B. platelet, lens, spherical or cylindrical. For example, increasing the rotational speed of the plate causes a more elongate shape of the formed particle.
  • the metallic starting materials Prior to granulation, the metallic starting materials, for example magnesium die-cast scrap, are selected under a protective gas atmosphere from the group consisting of noble gases such as argon, neon and helium or nitrogen, carbon dioxide or dry air with additions of sulfur dioxide, sulfur hexafluoride or r-134a or Mixtures thereof melted in the melting furnace 3.
  • a protective gas atmosphere from the group consisting of noble gases such as argon, neon and helium or nitrogen, carbon dioxide or dry air with additions of sulfur dioxide, sulfur hexafluoride or r-134a or Mixtures thereof melted in the melting furnace 3.
  • noble gases such as argon, neon and helium or nitrogen
  • carbon dioxide or dry air with additions of sulfur dioxide, sulfur hexafluoride or r-134a or Mixtures thereof melted in the melting furnace 3.
  • salts which leads to the formation of a protective layer of liquid salt on the melt surface and thus prevents a reaction of the melt with the air.
  • Metal powders made by the machining process also generally suffer from uneven composition in general.
  • the external gas pressure on the circumference of the dispersed droplets is preferably atmospheric pressure.
  • Magnesium die casting scrap of the alloy AZ91 is melted in an electrically heated melting furnace under nitrogen with 0.20% r-134 a at 680 ° C.
  • the melting furnace is a centrifugal pump, which at 5500 revolutions per minute, the magnesium melt in a from the melt furnace promotes leading, blind ending, closed, heated granulation tube with 16 dispensing nozzles.
  • Under the dispensing nozzles runs a water-cooled turntable.
  • a melt jet forms, which decays to droplets at a drop height of 120 mm.
  • Helium is conducted as a protective gas against the melt jet.
  • Guiding plates around the granulation tube form a bell, which prevent the escape of helium upwards and forms a granulation chamber 20 and a helium atmosphere for protecting the melt from oxidation between the granulation tube and turntable.
  • the rotation of the plate is carried out according to the requirements of the particle shape at a speed of 4-10 revolutions per minute.
  • the result is lenticular particles high form uniformity.
  • the particles are guided with a scraper from the turntable into a container. By subsequent sieving large, sometimes not dimensionally stable particles can be separated.
  • Fig. 4 shows 3 sieve fractions of so produced granules of the magnesium alloy AZ91.
  • FIG Fig. 2a A light microscopic picture of a cross section of the particles thus produced is shown in FIG Fig. 2a shown in comparison with a cross-section of particles from the conventional machining process. It is noticeable that the section through the particles produced by machining shows considerably larger grains and transition zones than the fine-crystalline structure of the casting particles produced by the granulation method from the melt.
  • the Mg particles produced according to the invention are superior to the particles produced by machining processes both in terms of their microstructure and their external shape.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (13)

  1. Dispositif de production de particules métalliques arrondies à uniformité de taille et de forme provenant d'une fonte avec
    - une chambre de granulation (20) remplie pour l'essentiel de gaz inerte avec un tube de granulation (5), ayant au moins un orifice de sortie de la fonte (16), qui guide la fonte vers les orifices de sortie ;
    - un plateau tournant (1), placé à une distance sous les orifices de sortie de la fonte (16) du tube de granulation (5), qui est peut être entraîné à une vitesse choisie de façon que le métal fondu s'égouttant par les orifices de sortie de la fonte (16) se solidifie en particules discrètes à la surface du plateau et
    - un dispositif d'alimentation en gaz pour flux commandé de gaz de protection dans le contre-courant de la fonte qui sort des orifices de sortie et constitution d'une atmosphère de protection dans la chambre de granulation (20).
  2. Dispositif selon la revendication 1 caractérisé en ce que le plateau tournant (1) de granulation est refroidi.
  3. Dispositif selon la revendication 1 ou 2 caractérisé en ce que le tube de granulation (5) est chauffé.
  4. Dispositif selon l'une des revendications précédentes caractérisé en ce que le tube de granulation (5) présente une bride aveugle.
  5. Dispositif selon l'une des revendications 1 à 3 caractérisé en ce que le tube de granulation (5) est renvoyé dans le four de fusion (3).
  6. Dispositif selon la revendication 5 caractérisé en ce qu'un système de clapets est prévu dans le tube de granulation pour commander le débit.
  7. Dispositif selon l'une des revendications précédentes caractérisé en ce qu'une pompe de refoulement est prévue dans/sur le four de fusion (3) pour transporter la fonte métallique vers/dans le tube de granulation (5).
  8. Procédé de production de particules métalliques arrondies à partir d'une fonte métallique hautement réactive à uniformité de taille et de forme comprenant les opérations suivantes :
    - fusion du matériaux primaires métalliques sous exclusion d'air ;
    - transport de la fonte métallique dans un tube de granulation fermé hors du four à fusion vers au moins une évacuation de fonte ;
    - sortie de la fonte de l'évacuation au-dessus d'un plateau tournant sous la forme de gouttes discrètes pour devenir un jet de fonte qui se décompose en gouttes jusqu'à l'arrivée sur le plateau tournant ;
    - guidage d'un courant de gaz de protection dans le sens inverse de la fonte sortant de l'évacuation de fonte ;
    - récupération de la fonte sur le plateau tournant sous la forme de gouttes de fonte discrètes ;
    - solidification des gouttes de fonte en particules granulées par contact avec la surface du plateau tournant plus froid et ;
    - guidage par le plateau tournant des particules granulées pour l'emballage/la poursuite de traitement.
  9. Procédé selon la revendication 8 caractérisé en ce que le matériau primaire du procédé est choisi à partir du groupe composé de Al, Mg, Ca, Zn ainsi que de leurs alliages.
  10. Procédé selon la revendication 8 ou 9 caractérisé en ce que la fusion du métal s'effectue sous une atmosphère gazeuse contrôlée.
  11. Procédé selon les revendications 8 à 10 caractérisé en ce que le courant de gaz de protection pour la fonte sortant de l'évacuation de fonte présente de l'hélium.
  12. Procédé selon les revendications 8 à 11 caractérisé en ce que la décomposition d'un jet de fonte sortant de l'orifice de sortie de fonte est assisté par un mouvement de montée et de descente pulsatoire du tube de granulation.
  13. Utilisation du procédé selon les revendications 8 à 12 pour la production de particules arrondies de fine microstructure ainsi que d'une uniformité de forme et de taille à partir de la fonte.
EP10745842.4A 2009-02-25 2010-02-25 Production de particules métalliques arrondies Not-in-force EP2421997B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009010600A DE102009010600A1 (de) 2009-02-25 2009-02-25 Herstellung von rundlichen Metallpartikeln
PCT/DE2010/000324 WO2010097079A2 (fr) 2009-02-25 2010-02-25 Production de particules métalliques arrondies

Publications (2)

Publication Number Publication Date
EP2421997A2 EP2421997A2 (fr) 2012-02-29
EP2421997B1 true EP2421997B1 (fr) 2015-04-08

Family

ID=42665979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10745842.4A Not-in-force EP2421997B1 (fr) 2009-02-25 2010-02-25 Production de particules métalliques arrondies

Country Status (7)

Country Link
US (1) US20120195786A1 (fr)
EP (1) EP2421997B1 (fr)
BR (1) BRPI1008736A2 (fr)
CA (1) CA2753577A1 (fr)
DE (2) DE102009010600A1 (fr)
MX (1) MX2011008947A (fr)
WO (1) WO2010097079A2 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013000249A1 (de) 2013-01-08 2014-07-10 Volkswagen Aktiengesellschaft Vorrichtung zur Herstellung von Metallgranulat aus der Semi-Solid-Phase
DE102013000248B4 (de) 2013-01-08 2019-10-17 Volkswagen Aktiengesellschaft Vorrichtung zur Herstellung von Metallgranulat aus der Flüssigphase
CN116475407A (zh) 2016-08-24 2023-07-25 伍恩加有限公司 低熔点金属或合金粉末雾化生产工艺
JP6926844B2 (ja) * 2017-08-31 2021-08-25 セイコーエプソン株式会社 チクソモールディング用原料、チクソモールディング用原料の製造方法および成形体
EP3752304B1 (fr) 2018-02-15 2023-10-18 5n Plus Inc. Procédés de fabrication par atomisation de poudres de métal ou d'alliage à point de fusion élevé
CN112497563B (zh) * 2020-11-12 2022-05-20 建德市春盛塑业有限公司 一种塑料颗粒及其制备工艺
EP4382228A1 (fr) * 2022-12-07 2024-06-12 Fehrmann GmbH Appareil d'atomisation pour produire de la poudre métallique, son utilisation et procédé de fonctionnement d'un appareil d'atomisation
CN117921013B (zh) * 2024-02-01 2024-09-13 安徽中体新材料科技有限公司 一种钛合金粉末制备装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB746301A (en) * 1953-03-18 1956-03-14 Dow Chemical Co Atomizing magnesium

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739743C (de) * 1936-02-08 1943-10-16 Hermann Plauson Verfahren zur Herstellung feinsten Metallpulvers aus fluessigem Metall
DE1081741B (de) * 1953-03-18 1960-05-12 Dow Chemical Co Verfahren zum Herstellen von Magnesiumlegierungen in Kugelform
GB754180A (en) * 1953-09-18 1956-08-01 Dow Chemical Co Atomizing aluminium or aluminium alloys
JPS5164456A (ja) 1974-12-02 1976-06-03 Nisshin Steel Co Ltd Kyujokinzokufunmatsuno seizoho oyobi sochi
DE2936691C2 (de) * 1979-09-11 1984-08-02 Itoh Metal Abrasive Co., Ltd., Nagoya, Aichi Vorrichtung zur Erzeugung sphärischer Teilchen oder Fasern
US4687510A (en) * 1983-01-24 1987-08-18 Gte Products Corporation Method for making ultrafine metal powder
JPS6333508A (ja) 1986-07-25 1988-02-13 Natl Res Inst For Metals 金属粉末または合金粉末の製造方法
JPH07173510A (ja) 1992-05-15 1995-07-11 Shin Etsu Chem Co Ltd 球状金属微粒子の製造方法
JPH0754019A (ja) * 1993-08-17 1995-02-28 Nippon Sozai Kk 多段階分裂及び急冷による粉末の作製法
JPH07179912A (ja) 1993-12-22 1995-07-18 Minerva Kiki Kk 球状金属粒子の生産方法
US5951738A (en) * 1995-10-27 1999-09-14 Alcan International Limited Production of granules of reactive metals, for example magnesium and magnesium alloy

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB746301A (en) * 1953-03-18 1956-03-14 Dow Chemical Co Atomizing magnesium

Also Published As

Publication number Publication date
US20120195786A1 (en) 2012-08-02
WO2010097079A4 (fr) 2012-03-01
EP2421997A2 (fr) 2012-02-29
WO2010097079A3 (fr) 2011-12-29
BRPI1008736A2 (pt) 2016-03-08
WO2010097079A2 (fr) 2010-09-02
CA2753577A1 (fr) 2010-09-02
DE202010018019U1 (de) 2013-08-09
MX2011008947A (es) 2012-02-08
DE102009010600A1 (de) 2010-11-11

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