EP4426507A1 - Verdüsungs-einheit zum verdüsen von metallenen schmelzen, insbesondere für pulvermetallurgische zwecke - Google Patents
Verdüsungs-einheit zum verdüsen von metallenen schmelzen, insbesondere für pulvermetallurgische zweckeInfo
- Publication number
- EP4426507A1 EP4426507A1 EP22813493.8A EP22813493A EP4426507A1 EP 4426507 A1 EP4426507 A1 EP 4426507A1 EP 22813493 A EP22813493 A EP 22813493A EP 4426507 A1 EP4426507 A1 EP 4426507A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- atomization unit
- crucible
- heating element
- designed
- 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
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
- B22F2009/088—Fluid nozzles, e.g. angle, distance
-
- 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
- B22F2009/0888—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 casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control
-
- 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
- B22F2009/0892—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 casting nozzle; controlling metal stream in or after the casting nozzle
Definitions
- the invention relates to an atomization unit for atomizing metal melts, in particular for powder metallurgy purposes, comprising a crucible with a bottom outlet, a melt nozzle arranged below the bottom outlet and a gas nozzle arranged concentrically to the melt nozzle.
- An atomizing unit of the type mentioned above is known, for example, from DE 10 044 364 C1.
- the atomization unit known from this publication comprises a crucible with a bottom outlet, a supporting crucible with a wall surrounding the crucible and a coaxial bottom opening.
- the atomizing unit further comprises a melt nozzle for generating a melt jet and a nozzle body associated with the melt nozzle, in which an annular slit nozzle concentric to the melt nozzle is arranged, and at least one gas channel for supplying the annular slit nozzle with an atomizing gas.
- prior art is known from the publications DE 33 113 43 A1, DE 35 339 64 C1, DE 40 113 92 A1, DE 197 386 82 A1, US 5366204 A and JP 2019059989 A.
- the prior art in particular the prior art according to DE 100 443 64C1, has the disadvantage that the heating of the crucible and the melt located therein as well as the preheating of the atomization gas is carried out by a single external Induction coil takes place, which causes heating by a thermal insulation surrounding the support crucible and the nozzle body from the outside.
- the arrangement is in particular also complex in terms of construction, since the crucible is surrounded by a support crucible through which the gas channel for the annular slit nozzle is passed.
- the invention is based on the object of providing an atomizing unit of the type mentioned at the outset that is of more compact and simpler construction.
- the invention is based on the object of providing such an atomization unit with relatively little insulation effort, in which solidification of the melt is nevertheless reliably prevented.
- the process reliability of such a unit represents an essential quality criterion.
- an atomizing unit or atomizing unit should be constructed as simply as possible, so that simple and quick maintenance of the melt nozzle is possible.
- the object is solved by an atomizing unit with the features of claim 1 .
- an atomizing unit for atomizing of metal melts comprising a crucible with a bottom outlet, a casting nozzle which is arranged below the bottom outlet and a gas nozzle arranged concentrically to the melt nozzle, the melt nozzle being designed in several parts and comprising a jacket body and a nozzle core and the Nozzle core passes through a conical seat in the shell body.
- the jacket body causes thermal insulation of the nozzle core, in particular in that it bears against the nozzle core over a substantial part of the jacket surface of the nozzle core and at least partially encloses it.
- the jacket body brings about a mechanical stabilization of the nozzle core.
- the nozzle core is preferably used in an exchangeable manner in the jacket body and is held by it.
- the jacket body is preferably designed as a perforated brick which has a conical passage as a seat for the nozzle core.
- the nozzle core can be designed in such a way that it protrudes or protrudes from the jacket body in the area of a nozzle tip. In this area, the melt nozzle can extend into a gas nozzle body.
- the gas nozzle body can be designed in several parts and together with the nozzle core form an annular slit nozzle for the atomizing gas.
- the jacket body is preferably designed to be heatable, so that the nozzle core can be indirectly heated in this way.
- the jacket body is expediently directly thermally coupled to the nozzle core.
- the nozzle core is held between the shell body and a bottom of the crucible.
- the nozzle core can, for example, have a circumferential collar with which the nozzle core is concentric and form-fitting in the conical seat of the sheath body is held.
- the seat of the jacket body can form a peripheral cylindrical shoulder on its side facing the crucible, into which the collar of the nozzle core fits.
- the jacket body can, for example, comprise at least one resistance heating element embedded in it.
- the resistance heating element may be in the form of a helical conductor which may be completely embedded in the material of the jacket body in such a way that the resistance heating element forms a conical enclosure around the hole passing through the jacket body.
- the crucible is also heated by a resistance heating element which encloses a lateral surface of the crucible.
- the jacket body of the melt nozzle comprises at least one heating element, which preferably bears against a contact surface of the jacket body.
- the heater can be designed as a heating pad, for example.
- the heating element is preferably embedded in the casing body between the casing body and a gas nozzle body of the gas nozzle.
- one or more heating elements can be integrated into a base of the jacket body of the melt nozzle.
- the heating element is preferably designed as a ceramic heating element.
- the ceramic heating element can consist entirely of a silicon nitrite or an aluminum nitrite, for example.
- the heating element can be in the form of a hot-pressed silicon nitrite ring which is inserted, for example, into a complementary recess in the bottom of the casing body.
- the heating element is preferably in thermally conductive contact with both the casing body and the gas nozzle body, so that the casing body and the gas nozzle body can be heated in this way Gas nozzle body and thus also heating of the atomizing gas flowing through the gas nozzle body is possible.
- the melt nozzle is heated directly by a heating coil provided in the perforated brick and that the gas nozzle body is heated directly by a heater or a heating pad which is located between the perforated brick and an upper part or a top side of the gas nozzle body.
- the outer contour of the nozzle core forms a parting line with the melting crucible and the jacket body, which is designed as a labyrinth seal, so that material penetrating the parting line from the bottom outlet can pass through multiple Diversion solidifies within the parting line and so a reliable seal is formed.
- Figure 1 is a sectional view through an atomization unit according to the invention.
- FIG. 2 shows a perspective view of a heating element of the atomizing unit according to the invention.
- the atomization unit 1 shown in section in Figure 1 comprises a crucible 2 made of a refractory material with a wall 3.
- the lateral surface of the crucible 2 and thus the wall 3 is surrounded by a crucible heater 13, which heats the crucible 2 and indirectly caused a located in the crucible 2 melt bath.
- the crucible heater 13 can be a resistance heater, but it can also be designed as an induction heater that heats the crucible 2 by means of a graphite succeptor.
- the crucible 2 includes a bottom outlet 4 to which a multi-part melt nozzle 16 is connected.
- the melt nozzle 16 comprises a perforated brick 7 as a jacket body and a nozzle core 17 which is inserted into the jacket body or into the perforated brick 7 .
- the perforated brick 7 forms a conical seat for the nozzle core 17 which is designed to complement this and which fits into the conical seat of the perforated brick 7 with a peripheral collar 18 .
- the collar 18 rests on a cylindrical shoulder 19 of the perforated brick 7 .
- the nozzle core 17 is inserted into the perforated brick 7 so that it can be replaced.
- the nozzle core 17 includes a cylindrical collar 21 which fits into a correspondingly shaped recess 22 on the bottom of the crucible 2 .
- the perforated brick 7 and the bottom of the melting crucible 2 form a border on both sides of the nozzle core 17 which passes through the perforated brick 7 and is fixed in a form-fitting manner in this way.
- the bottom outlet 4 of the crucible 2 and the nozzle core 17 form a melt channel 20 which forms a nozzle tip 5 at the leading end of the nozzle core 17 .
- the leading end of the nozzle core 17 extends through a gas nozzle body 8, which is composed of an upper nozzle part 14 and a lower nozzle part 15 and forms an annular slit nozzle 9 at the casting nozzle, via which an atomizing gas is supplied to the jet of molten metal emerging from the nozzle tip 5 and thereby effects an atomization or atomization of the melt into a metal powder.
- the nozzle tip 5 opens into an atomization tower, not shown, in which the metal powder is collected.
- the atomizing gas is supplied radially via a gas channel 10 through the gas nozzle body.
- the perforated stone 7, which causes thermal insulation and mechanical stabilization of the nozzle core 17, includes a heating coil 11 that consists for example of one or more resistance heating elements and which is embedded in the perforated brick 7 near the nozzle core 17 . Energizing the heating coil 11 causes direct heating of the perforated brick 7 and indirect heating of the nozzle core 17 used in this exchangeable manner by thermal conduction.
- the melt nozzle 16 comprises a heating element 12, which is designed as an all-ceramic, preferably ring-shaped heating element and forms a type of heating pad.
- the radiator is shown in perspective in FIG.
- the heating element 12 fits into a corresponding annular recess 23 in the bottom of the perforated brick and is in thermally conductive contact both with the perforated brick 7 and with the upper nozzle part 14 of the gas nozzle body 8.
- the heating element 12 can consist of a silicon nitrite, for example, and causes when current is applied Direct heating or warming of the gas nozzle body 8 and the perforated brick 7 via a voltage source and indirect heating of the nozzle core 17 and the atomization gas flowing through the gas nozzle body 8 via a voltage source.
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021212367.8A DE102021212367A1 (de) | 2021-11-03 | 2021-11-03 | Verdüsungs-Einheit zum Verdüsen von metallenen Schmelzen, insbesondere für pulvermetallurgische Zwecke |
| PCT/EP2022/080526 WO2023078911A1 (de) | 2021-11-03 | 2022-11-02 | Verdüsungs-einheit zum verdüsen von metallenen schmelzen, insbesondere für pulvermetallurgische zwecke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4426507A1 true EP4426507A1 (de) | 2024-09-11 |
Family
ID=84363713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22813493.8A Pending EP4426507A1 (de) | 2021-11-03 | 2022-11-02 | Verdüsungs-einheit zum verdüsen von metallenen schmelzen, insbesondere für pulvermetallurgische zwecke |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12447530B2 (de) |
| EP (1) | EP4426507A1 (de) |
| JP (1) | JP7808307B2 (de) |
| CN (1) | CN118055818A (de) |
| DE (1) | DE102021212367A1 (de) |
| WO (1) | WO2023078911A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1262520B (de) | 1963-10-10 | 1968-03-07 | Basf Ag | Vorrichtung zum Verspruehen bzw. Zerstaeuben von Schmelzen, insbesondere fluessigen Metallen |
| DE3024709A1 (de) | 1980-06-30 | 1982-01-28 | Leybold-Heraeus GmbH, 5000 Köln | Transportbehaelter fuer metallschmelzen |
| US4449902A (en) | 1982-11-12 | 1984-05-22 | Aluminum Company Of America | Apparatus for control of particle size in the production of atomized metal |
| DE3311343C2 (de) | 1983-03-29 | 1987-04-23 | Alfred Prof. Dipl.-Ing.Dr.-Ing. 7830 Emmendingen Walz | Verfahren zur Herstellung von feinen Metallpulvern sowie Vorrichtung zur Durchführung des Verfahrens |
| DE3533964C1 (de) | 1985-09-24 | 1987-01-15 | Alfred Prof Dipl-Ing Dr-I Walz | Verfahren und Vorrichtung zum Herstellen von Feinstpulver in Kugelform |
| DE4011392B4 (de) | 1990-04-09 | 2004-04-15 | Ald Vacuum Technologies Ag | Verfahren und Vorrichtung zur Formung eines Gießstrahls |
| US5366204A (en) | 1992-06-15 | 1994-11-22 | General Electric Company | Integral induction heating of close coupled nozzle |
| DE19738682B4 (de) | 1997-09-04 | 2006-10-19 | Ald Vacuum Technologies Ag | Schmelzbehälter |
| DE10044364C1 (de) | 2000-09-08 | 2002-01-17 | Ald Vacuum Techn Ag | Zerstäubungsaggregat zum Zerstäuben von Schmelzen |
| DE10340606B4 (de) * | 2003-08-29 | 2005-10-06 | Gerking, Lüder, Dr.-Ing. | Vorrichtung zum Verdüsen eines Schmelzestrahls und Verfahren zum Verdüsen von hochschmelzenden Metallen und Keramikschmelzen |
| JP6928869B2 (ja) | 2017-09-27 | 2021-09-01 | 日立金属株式会社 | 金属粉末製造装置 |
| DE102021208605A1 (de) | 2021-08-06 | 2023-02-09 | Sms Group Gmbh | Wechselsystem für eine Tundish-Einheit, Tundish-Einheit für ein Wechselsystem, Verdüsungsanlage sowie Verfahren zum Verdüsen von Metallschmelze |
-
2021
- 2021-11-03 DE DE102021212367.8A patent/DE102021212367A1/de active Pending
-
2022
- 2022-11-02 US US18/693,131 patent/US12447530B2/en active Active
- 2022-11-02 WO PCT/EP2022/080526 patent/WO2023078911A1/de not_active Ceased
- 2022-11-02 JP JP2024519862A patent/JP7808307B2/ja active Active
- 2022-11-02 CN CN202280067031.1A patent/CN118055818A/zh active Pending
- 2022-11-02 EP EP22813493.8A patent/EP4426507A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023078911A1 (de) | 2023-05-11 |
| DE102021212367A1 (de) | 2023-05-04 |
| JP2024538870A (ja) | 2024-10-24 |
| US20250128321A1 (en) | 2025-04-24 |
| JP7808307B2 (ja) | 2026-01-29 |
| US12447530B2 (en) | 2025-10-21 |
| CN118055818A (zh) | 2024-05-17 |
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