EP0071802A2 - Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif - Google Patents

Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif Download PDF

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Publication number
EP0071802A2
EP0071802A2 EP82106412A EP82106412A EP0071802A2 EP 0071802 A2 EP0071802 A2 EP 0071802A2 EP 82106412 A EP82106412 A EP 82106412A EP 82106412 A EP82106412 A EP 82106412A EP 0071802 A2 EP0071802 A2 EP 0071802A2
Authority
EP
European Patent Office
Prior art keywords
gap
pressure
liquid
currents
electromagnetic forces
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Withdrawn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
EP82106412A
Other languages
German (de)
English (en)
Other versions
EP0071802A3 (fr
Inventor
Franz Rudolf Dr. Block
Jürgen Dr. Pötschke
Dieter Figge
Gerd Artz
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Publication of EP0071802A2 publication Critical patent/EP0071802A2/fr
Publication of EP0071802A3 publication Critical patent/EP0071802A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • B22D11/0645—Sealing means for the nozzle between the travelling surfaces

Definitions

  • the invention relates to a method and a device for sealing the gap between relatively moving devices of a system for pouring liquid metals, the gap being created, for example, by the transition from a casting vessel to a casting and rolling system and preventing melt from flowing out through the gap and is lost for the strand formation.
  • the invention has for its object to provide a method for sealing the gap between relatively moving devices of a system for pouring liquid metals, with which it is possible to stabilize vertically extending interfaces between liquids and gases.
  • the invention proposes to proceed in such a way that a part of the liquid pressure which does not exceed the minimum liquid pressure at the gap cross section is compensated pneumatically, while the variable rest of the liquid pressure is absorbed by electromagnetic forces which result from the interaction of a magnetic induction with currents result in the liquid.
  • the method according to the invention allows pressure differences in the liquid to be compensated for by the electromagnetic forces additionally used.
  • the electromagnetic forces used according to the invention can easily be adapted to the local requirements, the inherent one Disadvantage of not being sufficiently strong, as a rule, is eliminated by the pneumatic pressure additionally applied according to the invention.
  • the electromagnetic forces are only used to compensate for the pressure components above a minimum value, while the minimum pressure is compensated pneumatically.
  • the walls delimiting the gap can be given a shape which creates a circumferential, endless gap in which the liquid forms a closed conductor in which currents are induced.
  • Walls delimiting the gap can also have a shape hold, which creates a gap of finite length, current being supplied at the ends of the gap via electrodes.
  • the gas pressure is regulated just below the minimum liquid pressure along the gap, for which purpose the pressure is determined by measuring the fill level in the inlet or by changes in the power loss of an inductor.
  • the primary magnetic induction can be generated by a coil, the distance between which is selected at the gap to be sealed such that the magnetic induction changes to the same extent as the pressure of the liquid along the gap.
  • An embodiment of the device according to the invention provides that porous stones are used as internals.
  • an embodiment of the device according to the invention provides that the spreading of large currents in conductors adjacent to the inductors is prevented by mutually insulated sections.
  • the sealing takes place along a rectangular gap. Its edges are formed by a refractory infeed 13 advanced over a refractory infeed 2 of a storage vessel 1, the steel strips 5 rotating over support rollers and brass blocks 9 on the side.
  • the liquid metal forms a closed rectangular conductor 14 in front of the gap.
  • a rectangular, current-carrying coil is arranged in front of the gap and is supplied with alternating current.
  • the time-varying magnetic fields induce currents in the liquid rectangular conductor 14.
  • the conductor loops formed by the coil 6 and the rectangular conductor 14 repel each other.
  • the coil is brought closer to the gap there, as shown in FIG. 3.
  • the main compensation of the ferrostatic pressure is pneumatic.
  • a suitable gas pressure is maintained via a gas supply line 3.
  • the gas pressure is readjusted in accordance with the level in the storage vessel 1, so that only a small constant part of the ferrostatic pressure has to be compensated electromagnetically at the upper edge.
  • the fill level is monitored with a measuring device, not shown.
  • the mean pressure can also be measured via changes in the power loss of the primary coil.
  • Inert gases are preferably considered as gases, but air is also suitable in many cases if it is only ensured that the gas flow near the surface of the liquid is as small as possible.
  • the pressure chamber is sealed externally using conventional technology. It is chosen according to the existing thermal and mechanical conditions. It will often be possible to move the seal to less hot areas or to cool it yourself.
  • the materials are selected or adapted to the special conditions.
  • Electrically highly conductive materials are cut and the section surfaces insulated from each other, e.g. B. by intermediate layers, oxide layers or plasma spraying, so that no undesirable large-scale currents can form.
  • Which frequency is expediently used in the primary coil depends on the conductivity of the liquid and also depends on how quickly the force density should drop from the surface to the inside of the liquid.
  • the penetration depth ⁇ of the electromagnetic fields in a conductor can be determined using the formula estimate.
  • the invention is of course not limited to the examples given here. Rather, it allows you to pay rich casting techniques, as they are described in the literature for low-melting metals, especially for aluminum - see German Offenlegungsschrift 28 30 284 and the processes mentioned there - can now also be used with higher-melting metals.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Fluid-Pressure Circuits (AREA)
EP82106412A 1981-08-07 1982-07-16 Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif Withdrawn EP0071802A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3131353 1981-08-07
DE19813131353 DE3131353A1 (de) 1981-08-07 1981-08-07 "verfahren und vorrichtung zum abdichten des spaltes zwischen relativ zueinander bewegten einrichtungen"

Publications (2)

Publication Number Publication Date
EP0071802A2 true EP0071802A2 (fr) 1983-02-16
EP0071802A3 EP0071802A3 (fr) 1983-06-01

Family

ID=6138851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106412A Withdrawn EP0071802A3 (fr) 1981-08-07 1982-07-16 Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif

Country Status (3)

Country Link
EP (1) EP0071802A3 (fr)
JP (1) JPS5865550A (fr)
DE (1) DE3131353A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103715A1 (fr) * 1982-08-23 1984-03-28 Fried. Krupp Gesellschaft mit beschränkter Haftung Fermeture entre une tuyère de coulée et une coquille de coulée continue, entourant celle-ci, pour de l'acier ayant une section de coulée rectangulaire
GB2140720A (en) * 1983-06-01 1984-12-05 Alusuisse Feeding molten metal through a nozzle to a casting mould
US4685505A (en) * 1986-01-06 1987-08-11 Aluminum Company Of America Non-contacting side edge dam means for roll casting
US4735254A (en) * 1985-06-27 1988-04-05 Kawasaki Steel Corporation Method and apparatus for casting endless strip
EP0290866A2 (fr) * 1987-05-15 1988-11-17 Westinghouse Electric Corporation Bobine excitatrice discret produisant un étanchement dans une machine de coulée continue pour le tube de coulée avec buse de sortie et la transition d'entrée de moule
EP0490463A1 (fr) * 1990-12-10 1992-06-17 Inland Steel Company Procédé et dispositif pour coulée de gelées métalliques
EP0531286A1 (fr) † 1988-11-17 1993-03-17 ARCH DEVELOPMENT CORPORATION, The University of Chicago Confinement lateral de metal liquide a l'aide de champs magnetiques alternatifs horizontaux
WO2006123023A1 (fr) * 2005-05-13 2006-11-23 Fai Production Procede et installation de transformation d’un metal a l’etat liquide en un metal a l’etat solide et fragmente

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1015314A (en) * 1963-11-13 1965-12-31 Davy & United Eng Co Ltd Continuous casting
DE2548939A1 (de) * 1974-11-01 1976-05-06 Erik Allan Olsson Verfahren zur herstellung von metallischem bandmaterial durch giessen
DE2548940A1 (de) * 1974-11-01 1976-05-13 Erik Allan Olsson Verfahren zum abdichten von spaltfugen
EP0043987A1 (fr) * 1980-07-11 1982-01-20 Concast Holding Ag Installation pour la coulée continue de métal dans un système fermé d'alimentation du moule

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1015314A (en) * 1963-11-13 1965-12-31 Davy & United Eng Co Ltd Continuous casting
DE2548939A1 (de) * 1974-11-01 1976-05-06 Erik Allan Olsson Verfahren zur herstellung von metallischem bandmaterial durch giessen
DE2548940A1 (de) * 1974-11-01 1976-05-13 Erik Allan Olsson Verfahren zum abdichten von spaltfugen
EP0043987A1 (fr) * 1980-07-11 1982-01-20 Concast Holding Ag Installation pour la coulée continue de métal dans un système fermé d'alimentation du moule

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103715A1 (fr) * 1982-08-23 1984-03-28 Fried. Krupp Gesellschaft mit beschränkter Haftung Fermeture entre une tuyère de coulée et une coquille de coulée continue, entourant celle-ci, pour de l'acier ayant une section de coulée rectangulaire
US4502526A (en) * 1982-08-23 1985-03-05 Fried. Krupp Gesellschaft mit beschr/a/ nkter Haftung Seal for a continuous steel caster
GB2140720A (en) * 1983-06-01 1984-12-05 Alusuisse Feeding molten metal through a nozzle to a casting mould
US4735254A (en) * 1985-06-27 1988-04-05 Kawasaki Steel Corporation Method and apparatus for casting endless strip
US4817702A (en) * 1985-06-27 1989-04-04 Kawasaki Steel Corporation Apparatus for casting endless strip
US4685505A (en) * 1986-01-06 1987-08-11 Aluminum Company Of America Non-contacting side edge dam means for roll casting
EP0290866A2 (fr) * 1987-05-15 1988-11-17 Westinghouse Electric Corporation Bobine excitatrice discret produisant un étanchement dans une machine de coulée continue pour le tube de coulée avec buse de sortie et la transition d'entrée de moule
EP0290866A3 (fr) * 1987-05-15 1989-07-19 Westinghouse Electric Corporation Bobine excitatrice discret produisant un étanchement dans une machine de coulée continue pour le tube de coulée avec buse de sortie et la transition d'entrée de moule
EP0531286A1 (fr) † 1988-11-17 1993-03-17 ARCH DEVELOPMENT CORPORATION, The University of Chicago Confinement lateral de metal liquide a l'aide de champs magnetiques alternatifs horizontaux
EP0531286B2 (fr) † 1988-11-17 2002-11-06 ARCH DEVELOPMENT CORPORATION, The University of Chicago Confinement lateral de metal liquide a l'aide de champs magnetiques alternatifs horizontaux
EP0490463A1 (fr) * 1990-12-10 1992-06-17 Inland Steel Company Procédé et dispositif pour coulée de gelées métalliques
WO2006123023A1 (fr) * 2005-05-13 2006-11-23 Fai Production Procede et installation de transformation d’un metal a l’etat liquide en un metal a l’etat solide et fragmente

Also Published As

Publication number Publication date
JPS5865550A (ja) 1983-04-19
EP0071802A3 (fr) 1983-06-01
DE3131353A1 (de) 1983-02-24

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Inventor name: BLOCK, FRANZ RUDOLF, DR.

Inventor name: POETSCHKE, JUERGEN, DR.

Inventor name: FIGGE, DIETER

Inventor name: ARTZ, GERD