EP0800879B1 - Lingotière refroidie pour la fabrication de lingots, procédé de coulée continue ainsi que procédé pour la refonte sous laitier électroconducteur - Google Patents

Lingotière refroidie pour la fabrication de lingots, procédé de coulée continue ainsi que procédé pour la refonte sous laitier électroconducteur Download PDF

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Publication number
EP0800879B1
EP0800879B1 EP96119516A EP96119516A EP0800879B1 EP 0800879 B1 EP0800879 B1 EP 0800879B1 EP 96119516 A EP96119516 A EP 96119516A EP 96119516 A EP96119516 A EP 96119516A EP 0800879 B1 EP0800879 B1 EP 0800879B1
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EP
European Patent Office
Prior art keywords
chill mould
cooled
water
electroconductive
slag
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.)
Expired - Lifetime
Application number
EP96119516A
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German (de)
English (en)
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EP0800879A2 (fr
EP0800879A3 (fr
Inventor
Harald Dipl.-Ing. Holzgruber
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.)
Inteco Internationale Techinsche Beratung GmbH
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Inteco Internationale Techinsche Beratung GmbH
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Publication of EP0800879A3 publication Critical patent/EP0800879A3/fr
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Publication of EP0800879B1 publication Critical patent/EP0800879B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds

Definitions

  • the invention relates to a short, water-cooled, below open mold for making blocks or strands according to the preamble of claim 1. Also recorded the invention a device with such a mold for the continuous casting of metals and a method for Electroslag remelting.
  • the one in electro-slag remelting for special process variants used so-called stand molds should not be here to be viewed as.
  • molds of interest here enable this Making strands or blocks that last considerably longer are as the water-cooled molds, with the conventional Continuous casting the strand formed in the mold subtracted either vertically or in an arc becomes.
  • electroslag When electroslag is remelted, it can be in the mold formed block either by lowering a bottom plate subtracted down, or it can be Chill mold can be lifted in the way that on a fixed base plate a remelting block is built.
  • Electroslag remelting largely solved, since here the liquid metal sump is covered by a slag bath and is protected from direct air access. The The electrode tip also melts within of the slag bath so that direct contact of the liquid metal with the surrounding atmosphere avoided becomes.
  • the continuous casting was initially done in air, trying was, by adding oil in the area of the pouring level to limit the oxidation of the metal.
  • the Introduction of mold powder to cover the mold level and the use of dip tubes for the supply of the liquid Metal in the mold has further improvements here guided.
  • DE-A-1 483 646 describes a method for producing Cast blocks described with directional solidification, at which the surface of the melting sump by an overlying Slag layer is kept warm; the latter is produced in a predetermined area of the mold is connected to a power source.
  • the slag bath is heated by the current transfer between two poles, one of them through the slag bath / smelter interface as well as the other from one into that Slag bath immersed - and also to that power source connected - power supply electrode formed becomes.
  • That electrode is otherwise not identical to that metal forming the ingot; it is either as separate supply element on the slag layer set or attached to the top of the mold wall; an insulating intermediate piece is imperative in it Ceramic between the electrode and the mold required to avoid an otherwise occurring short circuit prevent.
  • the second pole can also be from one directed towards the slag bath charge carrier beam a source that is not immersed in the slag bath be formed. That which solidifies in the mold Metal can be extracted from a slag bath as liquid metal Pouring ladle, as granules from a container or in form be fed to a self-consuming electrode.
  • GB-A-1 413 508 discloses a mold in its mold wall installed a non-consumable current-carrying element as well as via a rectifier with the power supply is connected that both the electrode and the Pouring cross section - in relation to the non-edible element - are always electrically negatively polarized.
  • US-A-3 768 543 is used to manufacture metal blocks from small pieces of metal particles in one several parts of existing water-cooled mold a meltable one between two water-cooled elements Metal electrode installed so that it is partially through the Cooling effect of these elements protected and with one pole is connected to a power source.
  • One below the meltable electrode arranged mold element jumps inside in front.
  • the Electricity flows here between the partial melting electrode in the mold wall and the Block.
  • a system and a method according to DE 2 620 823 are intended in particular for the production of narrow slabs i.e. rectangular block formats, can be useful, whereby among other things consumable used, their cross-sectional area 1.05 to 20 times the cross-sectional area of the produced Blocks is.
  • a slag bath is formed in the mold, in which both Immerse consumable and non-consumable electrodes.
  • electrodes their cross-sectional area larger than the cross-sectional area of the manufactured Blocks is, molds are expanded funnel-shaped upwards used.
  • auxiliary electrodes discussed here have the disadvantage that they are not an integrated part of the mold wall and only partially immerse in the slag bath. Above of the hot slag are auxiliary electrodes on almost Heated slag temperature and in contact with the ambient air oxidized very quickly, leaving only an insufficient Durability is achieved.
  • the water-cooled copper elements Mold wall formed at least one not directly water-cooled current-carrying element installed so that this in a region which determines the position of the slag bath (20) is therefore in contact with the slag bath, and also completely below the surface of the slag bath is arranged, but not up to the mirror of the liquid metal is enough; over this element is a Contact can be made to a power source that according to Claim 1 on the other hand to an edible electrode or the resulting block or the one bearing it Base plate is connected.
  • these current-conducting elements preferably uses graphite in a manner known per se, but also high-melting metals, such as Tungsten, molybdenum or the like are suitable.
  • the upper part of the Chill mold that receives the slag bath and into which current-carrying element (s) is / are installed funnel-shaped be expanded. This may be particularly true in manufacturing of strands of small cross-section with a diameter or a side length of less than 300 mm of interest his.
  • a further embodiment of the mold according to the invention provides that the built-in current-conducting element (s) is / are electrically insulated from the copper part of the mold by installing non-conductive elements.
  • Refractory ceramic materials such as fireclay, Al 2 O 3 , MgO etc. come into consideration as the material for the non-conductive elements.
  • the mold according to the invention enables a number of different arrangements and process variants with electroslag remelting or with Continuous casting, the most important of which are described below become.
  • Fig. 1 shows the schematic structure of a tubular Mold 10 for so-called electro-slag remelting (ESU).
  • ESU electro-slag remelting
  • a remelting block 16 is formed and so deducted from the mold 10 that the meniscus one liquid sump 18 in that lower water-cooled Mold part 12 is located.
  • a liquid To recognize slag bath 20 in which an edible Electrode 22 is immersed.
  • the inflows of the mold parts 12, 14 for the cooling water are designated 28 for the sake of clarity Drains with 30.
  • the mold 10 described above is also suitable for continuous casting, as shown in FIG. 2. Again, the meniscus of the liquid Bottom 18 of the strand 32 withdrawn from the mold 10 covered by the liquid slag bath 20, which in the Area of the not directly cooled current-conducting element 24 and the - also not directly cooled - not current-conducting elements 26 is held. That all in one liquid widening upward intermediate vessel 34 Metal 36 arrives in the flow direction x via an immersion tube 38 as a pouring jet 40 directly into the liquid sump 18.
  • Fig. 3 offers the schematic structure of an ESCU system Sliding mold using the one shown in Fig. 1 Mold 10 on.
  • the installation of a current-carrying element 24 in the area of the slag bath 20 enables a number of Variants for connecting the system to a power source 42 for alternating or direct current through corresponding Switching switches 44, 46, 48, 50 can be achieved can.
  • a current flow like that of conventional electroslag remelting is common arises when the switches 44 - in line 45 between current source 42 and electrode 22 - and switch 48 - in line 49 between current source 42 and a base plate 52 - are closed when open Switch 46; the latter is the current-carrying element 24 assigned.
  • Switching point 48 is with Line 49 connected.
  • FIG. 4 shows an embodiment of the mold 10 according to the invention, in which two current-conducting elements 24 a and 24 b are insulated from the lower water-cooled mold part 12 and the upper water-cooled mold part 14 by non-current-conducting elements 26 and horizontally from one another by likewise non-current-conducting intermediate elements 58 are.
  • two current-conducting elements 24 a and 24 b are insulated from the lower water-cooled mold part 12 and the upper water-cooled mold part 14 by non-current-conducting elements 26 and horizontally from one another by likewise non-current-conducting intermediate elements 58 are.
  • the current flows through the slag bath 20 between the two current-conducting parts 24 a , 24 b .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Furnace Details (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Claims (10)

  1. Coquille (10) ouverte vers le bas, refroidie à l'eau, courte, pour la fabrication de blocs ou de tronçons (16), dans laquelle un niveau de coulée, délimité par un fond (18) liquide, est couvert par une scorie, conductrice de l'électricité, d'un bain de scories (20), qui est disposé dans une zone déterminant la position du bain de scories (20) et délimitée par la surface des scories, le bloc ou le tronçon (11) se trouvant dans la partie inférieure de la coquille (10) étant moulé et en étant extrait, soit par levage de la coquille soit par abaissement du bloc ou du tronçon (16), à l'aide d'une plaque de fond,
       au moins un élément (24) conducteur de l'électricité étant prévu et celui-ci étant réalisé de façon à pouvoir être relié à une source électrique (42) qui, de son côté, vient en contact avec le bain de scories (20) et, d'autre part, n'arrive pas jusqu'au niveau du métal liquide,
       caractérisée en ce que l'élément (24) conducteur de l'électricité n'est pas directement refroidi à l'eau et est intégré dans la paroi de coquille (12), formée à partir d'éléments (12, 14) refroidis à l'eau et non conducteurs de l'électricité, en étant situé dans la zone déterminant la position du bain de scories (20), ainsi que se trouvant complètement au-dessous de la surface du bain de scories, lors du fonctionnement, la source de courant (42) étant réalisée de façon à pouvoir être raccordée à une électrode (22) consommable et/ou au bloc (16) en formation et/ou à une plaque de fond (52) qui l'entoure par le dessous.
  2. Coquille selon la revendication 1, caractérisée en ce que le(s) élément(s) (24) non refroidi(s) à l'eau conducteur(s) de l'électricité est/sont constitué(s) du métal qu'est le tungstène W, molybdène Mo ou Niobium Nb.
  3. Coquille selon la revendication 1 ou 2, caractérisé en ce que la partie supérieure, contenant le bain de scories (20) et contenant l'élément (24) non refroidi à l'eau conducteur de l'électricité, de la coquille (10) est élargie en forme d'entonnoir.
  4. Coquille selon l'une des revendications 1 à 3, caractérisée en ce que le(s) élément(s) (24) non refroidi(s) à l'eau conducteur(s) de l'électricité, intégré(s) dans la paroi de coquille (12) est/sont isolé(s) complètement électriquement vis-à-vis des parties refroidies à l'eau de la coquille, par des éléments (26, 58) non conducteurs du courant électrique.
  5. Coquille selon l'une des revendications 1 à 4, caractérisée en ce que, dans la paroi de coquille (12), constituée d'éléments refroidis à l'eau, sont intégrés au moins deux éléments (24) conducteurs de l'électricité, non directement refroidis à l'eau, qui l'un par rapport à l'autre sont complètement isolés par des éléments (26, 58) non conducteurs de l'électricité, non directement refroidis à l'eau, ainsi que chaque fois par un pôle de la source électrique (42).
  6. Coquille selon la revendication 4 ou 5, caractérisée en ce que les éléments (26) non conducteurs du courant électrique sont isolés horizontalement l'un par rapport à l'autre à l'aide d'éléments intermédiaires (58) non conducteurs de l'électricité (figure 5).
  7. Dispositif pour la coulée continue de métaux avec utilisation d'une coquille (10) selon l'une des revendications précédentes, en particulier selon les revendications 4 à 6, caractérisé par un tube immergé (38), guidant le métal liquide, venant d'un distributeur (34), jusque dans le fond métallique (18) couvert dans la coquille (10) par la scorie liquide, conductrice de l'électricité, du bain de scories (20), où, pour chauffer les scories, du courant électrique est passé entre des éléments (24) conducteurs de l'électricité, non refroidis à l'eau, intégrés dans la paroi de coquille (12) dans la zone du bain de coquille (20) et le tronçon (16).
  8. Procédé de remise en fusion des scories électriques de métaux avec une électrode consommable en utilisant une coquille selon au moins l'une des revendications 1 à 6, caractérisé en ce que le courant de fusion, passé au bain de scories par l'électrode consommable, est dérivé par le(s) élément(s) conducteur(s) de l'électricité, non refroidi(s) à l'eau, intégré(s) dans la paroi de coquille.
  9. Procédé de refusion du laitier électrique de métaux, pour former un bloc en utilisant une coquille, selon l'une des revendications 1 à 6, caractérisé en ce que le courant de fusion est amené par le(s) élément(s) intégré(s) dans la paroi de coquille, non refroidi(s) à l'eau, conducteur(s) de l'électricité et évacué(s) par le bloc et par une plaque de fond, l'entourant.
  10. Procédé de refusion de laitier électrique de métaux, avec utilisation d'une coquille ouverte vers le bas refroidie à l'eau, courte, pour la fabrication de blocs ou de barres, dans laquelle un niveau de coulée, délimitant un fond liquide, est couvert par une scorie, conductrice de l'électricité, d'un bain de scories, qui est disposée dans une zone déterminant la position du bain de scories et délimitée par la surface des scories, le bloc ou le tronçon étant formé dans la partie inférieure de la coquille et en étant prélevé chaque fois par levage de la coquille ou par abaissement du bloc, sachant que des éléments conducteurs de l'électricité sont prévus et ceux-ci étant réalisés de façon à pouvoir être reliés à une source électrique, caractérisé en ce que tant l'amenée, qu'également le retour du flux de fusion, est effectué par des éléments conducteurs de l'électricité, non refroidis à l'eau, intégrés dans la paroi de coquille.
EP96119516A 1996-04-11 1996-12-05 Lingotière refroidie pour la fabrication de lingots, procédé de coulée continue ainsi que procédé pour la refonte sous laitier électroconducteur Expired - Lifetime EP0800879B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614182A DE19614182C1 (de) 1996-04-11 1996-04-11 Wassergekühlte Kokille zum Herstellen von Blöcken oder Strängen sowie deren Verwendung
DE19614182 1996-04-11

Publications (3)

Publication Number Publication Date
EP0800879A2 EP0800879A2 (fr) 1997-10-15
EP0800879A3 EP0800879A3 (fr) 1998-09-30
EP0800879B1 true EP0800879B1 (fr) 2002-03-13

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EP96119516A Expired - Lifetime EP0800879B1 (fr) 1996-04-11 1996-12-05 Lingotière refroidie pour la fabrication de lingots, procédé de coulée continue ainsi que procédé pour la refonte sous laitier électroconducteur

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EP (1) EP0800879B1 (fr)
JP (1) JP3539706B2 (fr)
DE (2) DE19614182C1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT409233B (de) * 2000-02-07 2002-06-25 Inteco Int Techn Beratung Verfahren und anordnung zum herstellen von gusskörpern aus metallen
AT409729B (de) * 2000-02-16 2002-10-25 Inteco Int Techn Beratung Verfahren und anordnung zur herstellung von hohlen gusskörpern aus metallen
EP1136576B1 (fr) * 2000-03-21 2004-12-29 General Electric Company Systèmes de fusion sous laitier électroconducteur à orifice de coulée au fond et circulation contrôlée du courant électrique
AT410412B (de) † 2000-11-10 2003-04-25 Inteco Int Techn Beratung Verfahren zum elektroschlacke umschmelzen von metallen
AT410413B (de) * 2000-11-14 2003-04-25 Inteco Int Techn Beratung Verfahren zum elektroschlacke umschmelzen von metallen
US20050173092A1 (en) * 2004-02-10 2005-08-11 Kennedy Richard L. Method and apparatus for reducing segregation in metallic ingots
DE102005037982B3 (de) 2005-08-02 2007-03-15 Leibniz-Institut Für Festkörper- Und Werkstoffforschung Dresden E.V. Verfahren zur Herstellung metallhaltiger Gusskörper und Vorrichtung dafür
AT504574B1 (de) * 2006-11-15 2009-08-15 Inteco Special Melting Technol Verfahren zum elektroschlacke umschmelzen von metallen
EP1925681B1 (fr) 2006-11-15 2011-04-27 Inteco special melting technologies GmbH Procédé de refonte de métaux sous laitier électroconducteur et lingotière à cet effet
AT509736B1 (de) * 2010-05-14 2012-03-15 Inteco Special Melting Technologies Gmbh Verfahren und vorrichtung zur kontinuierlichen erfassung des schlackenniveaus in esu-anlagen mit kurzen gleitkokillen
DE102011050149A1 (de) * 2010-11-17 2012-05-24 Ferrofacta Gmbh Druckgussdüse und Druckgussverfahren
CN102974807A (zh) * 2012-08-01 2013-03-20 南昌大学 一种提高液态金属充型能力的方法及装置
CN105483391B (zh) * 2015-12-11 2017-08-11 东北大学 确定单电源双回路电渣重熔过程中工艺参数的装置及方法
CN112410573B (zh) * 2020-10-30 2022-03-22 东北大学 用于冶炼含Ce的Fe-Ni软磁合金的渣系及其使用方法
CN114606391A (zh) * 2022-03-11 2022-06-10 东北大学 一种电渣重熔法制备复合钢锭板坯的装置

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DE1483646A1 (de) * 1965-06-11 1969-09-25 Suedwestfalen Ag Stahlwerke Verfahren und Vorrichtung zum Herstellen von Gussbloecken,vorzugsweise Stahlbloecken
DE1962135C3 (de) * 1969-12-11 1980-01-17 Leybold-Heraeus Gmbh, 5000 Koeln Verfahren zur Reinigung von Metallen in einem Elektroschlacke-umschmelzofen
US3768543A (en) * 1971-06-15 1973-10-30 V Kolisnyk Electro-slag furnace for producing continuous ingot
GB1413508A (en) * 1972-08-25 1975-11-12 British Steel Corp Secondary refining process
DE2620823C3 (de) * 1976-05-11 1982-03-11 Venjukovskij armaturnyj zavod, Čechov, Moskovskaja oblast' Verfahren und Anlage zum Elektroschlacke-Umschmelzen von Metallen und Verfahren zum Elektroschlacke-Umschmelzen mit dieser Anlage
AT406384B (de) * 1996-01-29 2000-04-25 Inteco Int Techn Beratung Verfahren zum elektroschlacke-strangschmelzen von metallen

Also Published As

Publication number Publication date
EP0800879A2 (fr) 1997-10-15
EP0800879A3 (fr) 1998-09-30
DE59608875D1 (de) 2002-04-18
DE19614182C1 (de) 1997-07-31
JP3539706B2 (ja) 2004-07-07
JPH1029042A (ja) 1998-02-03

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