EP0043987A1 - Installation pour la coulée continue de métal dans un système fermé d'alimentation du moule - Google Patents

Installation pour la coulée continue de métal dans un système fermé d'alimentation du moule Download PDF

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Publication number
EP0043987A1
EP0043987A1 EP81105098A EP81105098A EP0043987A1 EP 0043987 A1 EP0043987 A1 EP 0043987A1 EP 81105098 A EP81105098 A EP 81105098A EP 81105098 A EP81105098 A EP 81105098A EP 0043987 A1 EP0043987 A1 EP 0043987A1
Authority
EP
European Patent Office
Prior art keywords
mold
continuous
metal
spout
pouring
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.)
Granted
Application number
EP81105098A
Other languages
German (de)
English (en)
Other versions
EP0043987B1 (fr
Inventor
Wilfried Dr. Heinemann
Theodor Prof. Rummel
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.)
SMS Concast AG
Original Assignee
Concast Holding 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 Concast Holding AG filed Critical Concast Holding AG
Priority to AT81105098T priority Critical patent/ATE6476T1/de
Publication of EP0043987A1 publication Critical patent/EP0043987A1/fr
Application granted granted Critical
Publication of EP0043987B1 publication Critical patent/EP0043987B1/fr
Expired 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
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • 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
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould
    • 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 and a device for the continuous casting of metal in a closed pouring system, the metal being poured through a refractory distributor spout into a continuous mold connected to it.
  • the metal When continuously casting metal with a continuous mold, the metal can be fed in an open or in a closed pouring system.
  • Vertical and curved continuous casting plants are usually operated with an open pouring system, i.e. there is no connection between the distribution vessel and the continuous mold.
  • Horizontal continuous casting plants are almost exclusively built with a closed pouring system, whereby refractory parts of the distributor vessel are connected to the pouring side of the continuous mold.
  • the closed pouring system has the following advantages over the open pouring system. Contact of the cast metal with atmospheric oxygen between the distribution vessel and the continuous mold is excluded. A bath level regulation in the mold is not necessary.
  • a horizontal continuous casting installation is known from DE-OS 1 558 224, in which a distributor vessel is connected to a water-cooled mold.
  • the metal flows from the tundish into the mold without venting, the flow speed being regulated by the pull-out speed of the strand. It was found that the liquid metal begins to solidify not just in the mold, but already in the area of the connection level between the mold and the distributor vessel outlet opening, which leads to metal welds on the wall of the distributor vessel spout and as a result of that from the extraction rollers on the Exerted train leads to cracks in the already solidified Btrang circumference. This causes a considerable disturbance in the casting process and considerable material defects in the finished product.
  • a horizontal continuous casting process is also known, in which the metal is passed from a distributor vessel into the mold via a refractory, nozzle-like, widening connecting line.
  • the liquid metal is subjected to electromagnetic forces in this nozzle-like connecting line, which cause acceleration in the direction of flow on the circumference of the metal strand.
  • the metal flow preformed and accelerated in the nozzle-like extension should create a free annular space in the suddenly expanded mold cross-section, whereby a stable meniscus is to be favored.
  • the device for generating the electromagnetic forces along the nozzle-like connecting line corresponds to a stator of a linear motor.
  • a neutral gas under pressure which is at least equal to the maximum ferrostatic pressure in this area, is introduced into the free annular space via a plurality of slots.
  • these complex process steps such as the application of an axial acceleration of the melt in the connecting line and the pressurization in the annular space, malfunctions in the annular space cannot be completely avoided when the line is at a standstill or when the strand extraction movement changes.
  • the injected inert gas can be entrained by the moving strand because of the lower ferrostatic pressure on the top side of the strand compared to the bottom side of the strand. On the one hand, this can produce additional disturbances in the annulus and, on the other hand, strand faults, in particular on the strand surface.
  • the welds already mentioned can occur on the end face of the nozzle-like connecting line with the disadvantages mentioned.
  • the object of the invention is to solve the known difficulties at the connection point between a refractory distribution vessel pouring spout and a mold, such as weldings, strand defects, openings, etc., with simple means.
  • Another object of the invention is to create a more economical casting process for multi-strand systems with horizontally or vertically arranged molds, which can be fed from a common intermediate vessel via a closed casting system.
  • the performance of such continuous casting plants is to be increased by extending the possible casting time.
  • this object is achieved in that the metal melt is kept away from the wall of the mold inlet opening by means of a constricting electromagnetic field in the area of a connecting plane of the distributor vessel pouring spout and the continuous mold.
  • the device according to the invention for carrying out the method is characterized in that an electromagnetic coil constricting the molten metal is arranged in the area of a connecting plane between the distributor vessel pouring spout and the continuous mold. It is particularly advantageous if the electromagnetic coil is arranged on the mold side of the connection level.
  • the invention enables simple procedures steps or an inexpensive device, the exploitation of the advantages of the closed casting system both in continuous casting with a vertically and horizontally arranged mold.
  • the disadvantages known from the prior art such as weldings, string faults and breakthroughs, can be eliminated. Longer sequences of pouring ladles can be poured due to significantly reduced wear in the pouring spout, which significantly reduces dead times and maintenance costs.
  • the process enables the construction of a simplified continuous casting plant, in which several strands fed from a common distributor vessel can be driven at a small mutual distance with a common pull-out unit and only the bath level in the distributor vessel has to be monitored.
  • a uniform supply of lubricant is solved by using a lubricant for the strand in the annular space while utilizing the vacuum Annulus is introduced.
  • a liquid, pasty or powdered lubricant for example a non-oxidizing gas with or without additives can also be introduced into the annular space or into the mold by the vacuum.
  • An additional reduction in wear on the refractory distribution vessel pouring spout can be achieved if, according to a further feature of the invention, the electromagnetic coil is arranged on both sides of the connection plane.
  • the invention further proposes to choose the outlet opening of the tundish spout and the mold inlet opening in the area of the connection level as well as the metal melt from the outlet opening by means of the electromagnetic Keep the field away.
  • the outlet opening of the distribution vessel pouring spout is smaller than the mold inlet opening in the region of the connection plane.
  • the electromagnetic coil can be arranged approximately concentrically to the mold cavity circumference.
  • the distance between the electro-magnetic coil and the mold cavity is smaller below the approximately horizontal longitudinal axis of the continuous mold than above the longitudinal axis.
  • the invention proposes, when casting strands with a round cross section, the use of an oval or an eccentrically arranged round electromagnetic coil, which has a smaller distance from the mold cavity below the horizontal longitudinal axis of the mold than above this longitudinal axis.
  • the quality of the strand surface can be improved according to an additional feature if between the refractory tundish pouring spout and the continuous mold a mold part is arranged with reduced thermal conductivity compared to the continuous mold.
  • An additional improvement in the constricting effect of the electromagnetic field in the mold cavity can be achieved if the mold part consists of paramagnetic material with a correspondingly low thermal conductivity.
  • a refractory distribution vessel pouring spout 2 is connected to a cooled continuous mold 3 with an approximately vertical longitudinal axis 1 of the mold, which represents a closed pouring system.
  • a connection level 4 is located between the flow mold 3 and the vessel pouring spout 2.
  • An electromagnetic coil 6 is arranged on the mold side of the connection level 4, which causes a constriction 7 of the steel flowing into the flow mold 3.
  • a free annular space 8 is formed, so that the incoming steel cannot yet touch the mold 3 in the area of the connection plane 4.
  • the Vessel spout 2 is part of a distribution vessel, not shown.
  • the continuous mold 3 is followed, as a rule, by known support guide elements (not shown) and a strand extraction unit for continuous or intermittent strand extraction.
  • an outlet opening 5 of the pouring spout 2 is smaller than the mold inlet opening 11.
  • FIG. 2 the same parts of the figures are provided with the same reference numbers as in FIG. 1.
  • An outlet opening 10 of the distribution vessel pouring spout 2 is of the same size as the mold inlet opening 11 in the area of the connection level 4.
  • an electromagnetic coil 6 ′ is arranged on both sides of the connection level 4, which keeps the metal away from the outlet opening 10 through the electromagnetic field. This creates a constriction 7 ', which bridges the contact of the melt 13 both with respect to the outlet opening 10 and with respect to the mold inlet opening 11.
  • the shape of the free annular space 8 ' differs from that of the annular space 8 in FIG. 1.
  • the longitudinal axis 14 of a continuous mold 3 ' is approximately horizontal.
  • a distance 15 between a water-cooled, electromagnetic, single-wind coil 16 and the mold cavity 19 below the horizontal longitudinal axis 14 of the continuous mold 3 ' is smaller than a distance 18 above the longitudinal axis 14.
  • This lining is advantageously made of paramagnetic material, such as stainless steel. So that no vacuum forms in the free annular space 8 ', which would counteract the constriction 7, one becomes Container 22 is supplied with an inert gas through fine feed slots 24 into the annular space 8 'via a pressure reducing valve 23. This pressure is adjusted approximately to the atmospheric pressure and is therefore lower than the ferrostatic pressure of the melt.
  • the vacuum in the annular space 8 ' can also be used to introduce a lubricant for the strand.
  • a weakly oval-shaped electromagnetic coil 31 is arranged around a round strand cross section 32.
  • the design of the electromagnetic coil and the choice of power, frequency etc. must be carried out in such a way that in the area of the connection level the metal melt is kept away from the mold wall and / or from the distributor vessel outlet opening by means of a constricting electromagnetic field.
  • the following parameters can be used, for example, to cast a round strand of 100 mm in diameter using a device according to FIG. 2: For casting a square strand 150 mm According to a device according to FIGS. 3 and 4, the following parameters are recommended:
  • the method and the device according to the invention can basically be used for a large number of metals.
  • iron-carbon alloys can also be cast. Due to the free design possibility of the coil, only a few restrictions with regard to different strand formats are effective when using the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Continuous Casting (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Baking, Grill, Roasting (AREA)
  • Food-Manufacturing Devices (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP81105098A 1980-07-11 1981-07-01 Installation pour la coulée continue de métal dans un système fermé d'alimentation du moule Expired EP0043987B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105098T ATE6476T1 (de) 1980-07-11 1981-07-01 Vorrichtung zum stranggiessen von metall in einem geschlossenen eingiessystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5347/80 1980-07-11
CH5347/80A CH648500A5 (de) 1980-07-11 1980-07-11 Verfahren und vorrichtung zum stranggiessen von metall in einem geschlossenen eingiesssystem.

Publications (2)

Publication Number Publication Date
EP0043987A1 true EP0043987A1 (fr) 1982-01-20
EP0043987B1 EP0043987B1 (fr) 1984-03-07

Family

ID=4292056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105098A Expired EP0043987B1 (fr) 1980-07-11 1981-07-01 Installation pour la coulée continue de métal dans un système fermé d'alimentation du moule

Country Status (10)

Country Link
US (1) US4450892A (fr)
EP (1) EP0043987B1 (fr)
JP (1) JPS5744454A (fr)
KR (1) KR840002039B1 (fr)
AT (1) ATE6476T1 (fr)
BR (1) BR8104428A (fr)
CA (1) CA1176427A (fr)
CH (1) CH648500A5 (fr)
DE (1) DE3162508D1 (fr)
ES (1) ES8205141A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071802A2 (fr) * 1981-08-07 1983-02-16 Fried. Krupp Gesellschaft mit beschränkter Haftung Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif
EP0074545A1 (fr) * 1981-09-16 1983-03-23 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Procédé et installation de coulée continue horizontale de métaux liquides, notamment d'acier
EP0079580A1 (fr) * 1981-11-18 1983-05-25 Kawasaki Jukogyo Kabushiki Kaisha Procédé de coulée continue horizontale
EP0155575A1 (fr) * 1984-03-07 1985-09-25 Concast Standard Ag Procédé pour le réglage d'écoulement d'un liquide conductible à l'électricité spécialement d'un bain de métal de la coulée continue et dispositif pour la mise en oeuvre du procédé
EP0191586A1 (fr) * 1985-02-13 1986-08-20 Sumitomo Light Metal Industries Limited Coulée continue horizontale utilisant un champ électromagnétique supportant le lingot coulé
EP0248242A2 (fr) * 1986-06-05 1987-12-09 Westinghouse Electric Corporation Dispositif pour la coulée continue de métaux
EP0298373A2 (fr) * 1987-07-06 1989-01-11 Westinghouse Electric Corporation Installation électromagnétique de contrôle de l'écoulement du métal liquide ayant incorporé une action de pompage
US4846255A (en) * 1987-10-28 1989-07-11 The United States Of America As Represented By The United States Department Of Energy Electromagnetic augmentation for casting of thin metal sheets
EP0489348A1 (fr) * 1990-11-27 1992-06-10 Nkk Corporation Procédé et dispositif pour la coulée continue d'acier

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57209752A (en) * 1981-06-17 1982-12-23 Kawasaki Heavy Ind Ltd Horizontal continuous casting installation
JPS5886959A (ja) * 1981-11-18 1983-05-24 Kawasaki Heavy Ind Ltd 水平連続鋳造方法
JPS61111747A (ja) * 1984-11-07 1986-05-29 Nippon Kokan Kk <Nkk> 鋼板の連続鋳造装置
US4741383A (en) * 1986-06-10 1988-05-03 The United States Of America As Represented By The United States Department Of Energy Horizontal electromagnetic casting of thin metal sheets
US5379828A (en) * 1990-12-10 1995-01-10 Inland Steel Company Apparatus and method for continuous casting of molten steel
US5494095A (en) * 1992-04-08 1996-02-27 Inland Steel Company Apparatus for continuous casting of molten steel
IT1316299B1 (it) * 2000-01-26 2003-04-10 Danieli Off Mecc Procedimento e dispositivo per migliorare la qualita' di corpimetallici colati in continuo
DE10210430A1 (de) * 2002-03-09 2003-09-18 Sms Demag Ag Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455816A1 (de) * 1973-11-28 1975-06-05 Siderurgie Fse Inst Rech Stranggussverfahren mit horizontal angeordneter kokille
DE2756112A1 (de) * 1976-12-17 1978-06-22 Concast Ag Verfahren zum horizontalen stranggiessen und vorrichtung zur durchfuehrung desselben
DE2830284A1 (de) * 1977-07-12 1979-01-25 Anvar Verfahren und vorrichtung zum leiten von fluessigen metallstroemen ohne wandungen, insbesondere zur zentrierung, leitung oder erzeugung bzw. erhaltung ihrer kreisfoermigen form

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA878383A (en) * 1971-08-17 Schloemann Aktiengesellschaft Mold for the simultaneous continuous casting of a plurality of individual strands
DE1558224C3 (de) * 1967-06-24 1973-12-06 Theodor Prof. Dr.-Ing. 3000 Hannover-Kirchrode Rummel Verfahren und Vorrichtung zum horizontalen Stranggießen von schmelz flussigen Metallen, insbesondere Stahl
US3547182A (en) * 1968-02-21 1970-12-15 Nat Steel Corp Continuous casting apparatus
US3612149A (en) * 1968-09-05 1971-10-12 Concast Inc Continuous casting method
JPS5027028B1 (fr) * 1969-11-19 1975-09-04
US3630266A (en) * 1969-11-21 1971-12-28 Technicon Corp Continuous casting process
US3721287A (en) * 1971-11-19 1973-03-20 Aluminum Co Of America Method of continuously casting plate with textured surface
FR2316026A1 (fr) * 1975-07-04 1977-01-28 Anvar Dispositif electromagnetique de confinement des metaux liquides
JPS5232824A (en) * 1975-09-09 1977-03-12 Nippon Steel Corp Method of casting metal melts
DE2722969A1 (de) * 1976-05-24 1977-12-15 Bailey Ltd C H Schwimmdock
CH625728A5 (fr) * 1977-12-27 1981-10-15 Concast Ag
US4156451A (en) * 1978-02-07 1979-05-29 Getselev Zinovy N Continuous or semi-continuous metal casting method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455816A1 (de) * 1973-11-28 1975-06-05 Siderurgie Fse Inst Rech Stranggussverfahren mit horizontal angeordneter kokille
US3987840A (en) * 1973-11-28 1976-10-26 Institut De Recherches De La Siderurgie Francaise (Irsid) Method and apparatus for continuously casting of metal in horizontal direction
DE2756112A1 (de) * 1976-12-17 1978-06-22 Concast Ag Verfahren zum horizontalen stranggiessen und vorrichtung zur durchfuehrung desselben
FR2374113A1 (fr) * 1976-12-17 1978-07-13 Concast Ag Procede pour la coulee continue horizontale, en particulier d'acier, et dispositif pour la mise en oeuvre de ce procede
DE2830284A1 (de) * 1977-07-12 1979-01-25 Anvar Verfahren und vorrichtung zum leiten von fluessigen metallstroemen ohne wandungen, insbesondere zur zentrierung, leitung oder erzeugung bzw. erhaltung ihrer kreisfoermigen form
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

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071802A2 (fr) * 1981-08-07 1983-02-16 Fried. Krupp Gesellschaft mit beschränkter Haftung Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif
EP0071802A3 (fr) * 1981-08-07 1983-06-01 Fried. Krupp Gesellschaft mit beschränkter Haftung Procédé et dispositif pour rendre étanche l'entre-espace entre parties en mouvement relatif
EP0074545A1 (fr) * 1981-09-16 1983-03-23 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Procédé et installation de coulée continue horizontale de métaux liquides, notamment d'acier
EP0079580A1 (fr) * 1981-11-18 1983-05-25 Kawasaki Jukogyo Kabushiki Kaisha Procédé de coulée continue horizontale
EP0155575A1 (fr) * 1984-03-07 1985-09-25 Concast Standard Ag Procédé pour le réglage d'écoulement d'un liquide conductible à l'électricité spécialement d'un bain de métal de la coulée continue et dispositif pour la mise en oeuvre du procédé
US4694888A (en) * 1985-02-13 1987-09-22 Sumitomo Light Metal Industries, Ltd. Electromagnetic levitation casting
EP0191586A1 (fr) * 1985-02-13 1986-08-20 Sumitomo Light Metal Industries Limited Coulée continue horizontale utilisant un champ électromagnétique supportant le lingot coulé
EP0248242A2 (fr) * 1986-06-05 1987-12-09 Westinghouse Electric Corporation Dispositif pour la coulée continue de métaux
EP0248242A3 (en) * 1986-06-05 1988-08-17 Westinghouse Electric Corporation Continuous metal casting apparatus
EP0298373A2 (fr) * 1987-07-06 1989-01-11 Westinghouse Electric Corporation Installation électromagnétique de contrôle de l'écoulement du métal liquide ayant incorporé une action de pompage
US4842170A (en) * 1987-07-06 1989-06-27 Westinghouse Electric Corp. Liquid metal electromagnetic flow control device incorporating a pumping action
EP0298373A3 (en) * 1987-07-06 1989-11-29 Westinghouse Electric Corporation Liquid metal electromagnetic flow control device incorporating a pumping action
US4846255A (en) * 1987-10-28 1989-07-11 The United States Of America As Represented By The United States Department Of Energy Electromagnetic augmentation for casting of thin metal sheets
EP0489348A1 (fr) * 1990-11-27 1992-06-10 Nkk Corporation Procédé et dispositif pour la coulée continue d'acier
US5191928A (en) * 1990-11-27 1993-03-09 Nkk Corporation Method for continuous casting of steel and apparatus therefor

Also Published As

Publication number Publication date
ES504334A0 (es) 1982-06-01
US4450892A (en) 1984-05-29
ES8205141A1 (es) 1982-06-01
JPS5744454A (en) 1982-03-12
KR830005941A (ko) 1983-09-14
EP0043987B1 (fr) 1984-03-07
BR8104428A (pt) 1982-03-30
DE3162508D1 (en) 1984-04-12
JPS6257420B2 (fr) 1987-12-01
KR840002039B1 (ko) 1984-11-06
ATE6476T1 (de) 1984-03-15
CH648500A5 (de) 1985-03-29
CA1176427A (fr) 1984-10-23

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