EP0362530A1 - Procédé et dispositif de carlée verticale de métaux - Google Patents
Procédé et dispositif de carlée verticale de métaux Download PDFInfo
- Publication number
- EP0362530A1 EP0362530A1 EP89115323A EP89115323A EP0362530A1 EP 0362530 A1 EP0362530 A1 EP 0362530A1 EP 89115323 A EP89115323 A EP 89115323A EP 89115323 A EP89115323 A EP 89115323A EP 0362530 A1 EP0362530 A1 EP 0362530A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic
- rotating
- pouring
- melt
- outlet opening
- 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- Withdrawn
Links
- 239000000155 melt Substances 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002517 constrictor effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D39/00—Equipment for supplying molten metal in rations
- B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
Definitions
- the invention relates to a method for pouring molten metal from melt containers with an outlet opening having a vertical axis for the melt forming a pouring jet.
- Metal melts are usually allowed to emerge from melt containers with bottom openings in free fall.
- the pouring jet can be further processed in a variety of ways: for example, it is possible to feed the pouring jet to a casting mold in which a complicated shaped body is produced, or else a block casting mold for producing a block or ingot. It is also possible to feed the pouring jet for the production of metal powder to a centrifugal plate or an atomizing nozzle, which divide the pouring jet into very fine particles.
- the melt container can also be a so-called “funnel”, in which the melt is only present for a very short time for centering or for forming a pouring jet with a defined cross section.
- a funnel usually has a ceramic inner surface or brick lining to ensure the required temperature resistance to manufacture.
- the positioning of the pouring jet and the setting of a defined jet cross-section is particularly necessary in so-called atomization systems, in which a vertical pouring jet of the molten metal concentrically enters a rotationally symmetrical nozzle system in which it is divided into fine powder by the supersonic flow of an inert gas.
- the ceramic casting funnels used up to now are usually additionally heated in order to keep temperature losses of the melt, which result from their contact with the inner wall of the funnel, low.
- the metallic pouring jet became a current-carrying conductor by introducing probes and applying voltages made on which magnetic force fields can act for the purpose of beam guidance.
- the beam guidance is relatively small and imprecise.
- the probes introduced into the pouring jet also cause turbulence, by which the pouring jet is initially destabilized, which is contrary to the actual intention.
- the invention is therefore based on the object of specifying a method of the type described in the introduction, by means of which a pouring jet with a stable axis and a defined cross section is generated, which also detaches exactly centrally from the lower edge of the outlet opening.
- the object is achieved in the method described at the outset, according to the invention in that the pouring jet is passed in free fall through at least one magnetic field rotating about a vertical axis.
- a magnetic rotating field is used as the magnetic field, as is known from the stators of so-called three-phase motors. It is particularly expedient to use a speed or rotational frequency between 50 and 500 Hz.
- a swirl is forced on the pouring stream during its free fall and possibly also beforehand within the outlet opening or its tubular extension, which causes the pouring stream to rotate about its own, now exactly straight, vertical axis. It has shown that a very stable beam guidance is achieved so that the beam does not have the tendency to continuously shift or even "flutter" in the transverse direction.
- the influence of guidance on the melt and the speed of rotation of the melt can advantageously be increased by using at least two rotating fields arranged one above the other in the falling path of the melt, which rotate at the same speed but out of phase.
- the phase angle is preferably 90 °.
- a particular advantage here is that the pouring jet stabilization is possible without the need to place probes in the fall of the melt, so that additional turbulence and splashes are reliably avoided. Because the jet rotation already begins within the outlet opening or within the pipe socket adjoining the outlet opening, the rotating jet detaches itself rotationally symmetrically from the lower edge of the opening or from the mouth of the pouring funnel with great reliability.
- the invention also relates to a device for carrying out the method according to the invention.
- such a device initially has a melt container with a closable outlet opening, which has a vertical axis, for the formation of a vertically falling pouring jet, and a magnetic device which is arranged in the region of the outlet opening and surrounds the path of the melt.
- such a device is characterized according to the invention in that the magnet device is designed as a rotating field generator and in that the central axis of the rotating field generator runs coaxially with the axis of the outlet opening.
- Such a device can be improved according to a further development of the invention in that at least one further magnetic device for generating a continuously rotationally symmetrical magnetic field is arranged coaxially with the rotating field generator.
- electromagnetic, static or periodic guide fields which are rotationally symmetrical to the falling path of the pouring jet can also be connected upstream, interposed and / or connected downstream or directly superimposed on the at least one rotating field. This makes it possible to shape the beam cross section in the fall path and to maintain or continue this beam shaping over a longer area of the beam path, if necessary.
- Such magnetic devices can for example be designed similarly to electromagnetic electron lenses, i.e. these are so-called cylindrical coils, which are surrounded by a U-shaped yoke, the two legs of which extend radially and are connected to one another in the area of the outer diameter by a hollow cylindrical yoke.
- a magnetic rotating field can be brought about by measures known per se, as are known from the stators of three-phase motors.
- the speed can be adjusted in a particularly expedient manner in order to be able to use higher speeds of up to the order of a few kilohertz if necessary.
- a three-phase frequency generator is expediently provided, which can be designed both as a static combined actuator and as a motor generator.
- a melt container 1 which is rotationally symmetrical and has the shape of a funnel.
- the melt container has in its lower part a concentric outlet opening 2, which is followed by a vertical pipe socket 3 with a lower edge 4, which lies in a horizontal plane.
- the melt container 1 is filled with a melt 5, which is kept in the container for a limited time by a closure device, not shown.
- a closure device can consist, for example, of a so-called stopper rod, which is guided from above through the melt 5 into the outlet opening 2, or else by an electromagnetic closure, as is known from the prior art.
- the outlet opening 2 or the pipe socket 3 extending from it define a vertical system axis A-A, which defines the fall path for a pouring jet 6.
- the magnet device 7 which is designed in the manner of an electron lens and thereby generates a continuously rotationally symmetrical magnetic field.
- the magnet device 7 has a solenoid 8 which is surrounded on three sides by a pole shoe system which consists of two radial, annular legs 9 and 10 and a yoke 11 which connects the legs 9 to one another at their outer diameters. Seen in a radial section, the legs 9 and 10 form a horseshoe magnet with the yoke 11.
- the magnetic field lines emanating therefrom form the inner part of a toroidal magnetic field, as is known from electron-optical lenses.
- Such a magnetic field has a stabilizing effect on the pouring jet 6.
- an additional constricting effect can also be exerted on the pouring jet 6.
- magnet device 7 At the bottom of the magnet device 7 there is another magnet device 12, which is designed as a rotating field generator and whose central axis runs coaxially with the axis of the outlet opening 2 or with the system axis AA.
- the magnet device 12 is encapsulated; its horizontal cross section is shown in FIG. 2. It has a hollow cylindrical yoke 13, from which protrude three magnetic poles 14 radially inwards, which are provided with windings 15.
- the arrangement is carried out in the same way as in a three-phase motor.
- the individual windings 15 are connected in the manner shown to the terminals R, S, T and 0 of a three-phase network or generator, so that a magnetic rotating field can form inside the arrangement, as is known from three-phase motors.
- a further magnetic device 16 is connected to the magnetic device 12, which has the same structure as the magnetic device 12, that is to say is also designed as a rotating field generator. However, the arrangement is made or switched so that the rotating field of the magnetic device 16 is shifted in phase with respect to the rotating field of the magnetic device 12.
- Another lower magnetic device 17 is connected to the lower rotating field magnetic device 16, which corresponds in design to the magnetic device 7, ie generates a continuously rotationally symmetrical magnetic field.
- the effect is analogous to that of the magnetic device 7 (electron lens).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3829810A DE3829810A1 (de) | 1988-09-02 | 1988-09-02 | Verfahren und vorrichtung zum senkrechten abgiessen von metallschmelzen |
| DE3829810 | 1988-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0362530A1 true EP0362530A1 (fr) | 1990-04-11 |
Family
ID=6362132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89115323A Withdrawn EP0362530A1 (fr) | 1988-09-02 | 1989-08-19 | Procédé et dispositif de carlée verticale de métaux |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4987951A (fr) |
| EP (1) | EP0362530A1 (fr) |
| JP (1) | JPH02187253A (fr) |
| DE (1) | DE3829810A1 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0546241A1 (fr) * | 1991-12-10 | 1993-06-16 | Leybold Durferrit GmbH | Bobine destinée à l'évacuation d'un jet de métal liquide sortant d'un creuset à fusion |
| EP0486830A3 (en) * | 1990-11-17 | 1993-08-18 | Eckart-Werke Standard Bronzepulver-Werke Carl Eckart Gmbh & Co. | Process for the atomisation of molten metal to produce metal powders |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5272718A (en) * | 1990-04-09 | 1993-12-21 | Leybold Aktiengesellschaft | Method and apparatus for forming a stream of molten material |
| JPH07185739A (ja) * | 1993-11-30 | 1995-07-25 | John Campbell | 溶融金属の鋳造方法 |
| US5839485A (en) * | 1995-10-12 | 1998-11-24 | Xerox Corporation | Electromagnetic valve and demagnetizing circuit |
| US5685348A (en) * | 1996-07-25 | 1997-11-11 | Xerox Corporation | Electromagnetic filler for developer material |
| US6341642B1 (en) | 1997-07-01 | 2002-01-29 | Ipsco Enterprises Inc. | Controllable variable magnetic field apparatus for flow control of molten steel in a casting mold |
| US6056025A (en) * | 1997-09-03 | 2000-05-02 | Xerox Corporation | High speed air nozzle for particulate filling system |
| US6102088A (en) * | 1997-09-03 | 2000-08-15 | Xerox Corporation | Vacuum valve shutoff for particulate filling system |
| US6098677A (en) * | 1999-09-10 | 2000-08-08 | Xerox Corporation | High speed air nozzle with mechanical valve for particulate systems |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU66760A1 (fr) * | 1971-12-30 | 1973-03-01 | ||
| GB1517964A (en) * | 1976-07-18 | 1978-07-19 | Bicc Ltd | Control of flow of molten metal |
| FR2416752A1 (fr) * | 1978-02-10 | 1979-09-07 | Asea Ab | Procede et installation pour brasser du metal en fusion |
| DE2834305A1 (de) * | 1978-08-03 | 1980-02-14 | Aeg Elotherm Gmbh | Einrichtung zum elektromagnetischen ruehren der fluessigen schmelze in einer stranggiessanlage |
| 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 |
| FR2558085A1 (fr) * | 1984-01-18 | 1985-07-19 | Usinor | Procede et dispositif pour l'elaboration de rubans metalliques et semi-metalliques de faible epaisseur |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1028297B (de) * | 1952-06-16 | 1958-04-17 | Asea Ab | Vorrichtung zum Regeln der Stroemungsgeschwindigkeit von fluessigem Metall |
| DE1041652B (de) * | 1956-11-17 | 1958-10-23 | Heraeus Gmbh W C | Verfahren zum Betrieb einer Vakuum-Induktionsschmelzanlage |
| US2970830A (en) * | 1957-03-21 | 1961-02-07 | Soudure Electr Autogene | Varying the falling speed of a stream of molten metal |
| GB936259A (en) * | 1960-08-02 | 1963-09-11 | Concast Ag | Method of introducing a jet of molten metal from a casting ladle centrally into the mould of a continuous casting installation |
| GB1481301A (en) * | 1973-07-16 | 1977-07-27 | Bicc Ltd | Method of and apparatus for casting metals |
| FR2316026A1 (fr) * | 1975-07-04 | 1977-01-28 | Anvar | Dispositif electromagnetique de confinement des metaux liquides |
| FR2397251A1 (fr) * | 1977-07-12 | 1979-02-09 | Anvar | Procede et dispositif pour diriger, en l'absence de parois, des veines metalliques liquides, notamment pour les centrer, les guider ou controler leur forme circulaire |
| FR2530511B1 (fr) * | 1982-07-23 | 1985-07-05 | Cegedur | Procede de coulee de metaux dans lequel on fait agir des champs magnetiques |
| SU1166892A1 (ru) * | 1984-01-13 | 1985-07-15 | Институт проблем литья АН УССР | Способ заливки расплава |
| LU85846A1 (fr) * | 1985-04-10 | 1986-11-05 | Metz Paul | Dispositif de brassage de metal en fusion dans une installation de coulee continue |
| US4842170A (en) * | 1987-07-06 | 1989-06-27 | Westinghouse Electric Corp. | Liquid metal electromagnetic flow control device incorporating a pumping action |
-
1988
- 1988-09-02 DE DE3829810A patent/DE3829810A1/de not_active Withdrawn
-
1989
- 1989-01-24 US US07/301,166 patent/US4987951A/en not_active Expired - Fee Related
- 1989-08-19 EP EP89115323A patent/EP0362530A1/fr not_active Withdrawn
- 1989-09-01 JP JP1224748A patent/JPH02187253A/ja active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU66760A1 (fr) * | 1971-12-30 | 1973-03-01 | ||
| GB1517964A (en) * | 1976-07-18 | 1978-07-19 | Bicc Ltd | Control of flow of molten metal |
| FR2416752A1 (fr) * | 1978-02-10 | 1979-09-07 | Asea Ab | Procede et installation pour brasser du metal en fusion |
| DE2834305A1 (de) * | 1978-08-03 | 1980-02-14 | Aeg Elotherm Gmbh | Einrichtung zum elektromagnetischen ruehren der fluessigen schmelze in einer stranggiessanlage |
| 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 |
| FR2558085A1 (fr) * | 1984-01-18 | 1985-07-19 | Usinor | Procede et dispositif pour l'elaboration de rubans metalliques et semi-metalliques de faible epaisseur |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486830A3 (en) * | 1990-11-17 | 1993-08-18 | Eckart-Werke Standard Bronzepulver-Werke Carl Eckart Gmbh & Co. | Process for the atomisation of molten metal to produce metal powders |
| EP0546241A1 (fr) * | 1991-12-10 | 1993-06-16 | Leybold Durferrit GmbH | Bobine destinée à l'évacuation d'un jet de métal liquide sortant d'un creuset à fusion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02187253A (ja) | 1990-07-23 |
| US4987951A (en) | 1991-01-29 |
| DE3829810A1 (de) | 1990-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE FR GB LI SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19901012 |