EP0401144A1 - Vorrichtung und Verfahren zur Zuführung flüssigen Metalls an einer Stranggiessanlage für dünne metallische Produkte - Google Patents

Vorrichtung und Verfahren zur Zuführung flüssigen Metalls an einer Stranggiessanlage für dünne metallische Produkte Download PDF

Info

Publication number
EP0401144A1
EP0401144A1 EP90470029A EP90470029A EP0401144A1 EP 0401144 A1 EP0401144 A1 EP 0401144A1 EP 90470029 A EP90470029 A EP 90470029A EP 90470029 A EP90470029 A EP 90470029A EP 0401144 A1 EP0401144 A1 EP 0401144A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
metal
liquid metal
orifices
continuous casting
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Withdrawn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
EP90470029A
Other languages
English (en)
French (fr)
Inventor
Jacques Petegnief
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Publication of EP0401144A1 publication Critical patent/EP0401144A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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

Definitions

  • the invention relates to the continuous casting of thin metallic products and more particularly the supply of liquid metal to the casting space defined by the walls of a continuous casting mold of elongated cross section, suitable for the casting of such products, this ingot mold can be of the type with fixed walls or of the type with movable walls.
  • One of the known problems for the casting of metal in an ingot mold of elongated section is to ensure a supply of substantially homogeneous liquid metal throughout the section of the ingot mold, to, on the one hand, ensure the homogeneity of the cast product during solidification and after it and, on the other hand, avoid solidification of the metal at the meniscus in the areas furthest from those where the supply of molten metal takes place.
  • the feeding of an ingot mold of this type by a single vertical nozzle placed in the center of the horizontal section of the casting space risks leading to colder zones on the edges of the casting space and to a premature solidification of the liquid metal in said zones.
  • the feeding by a single nozzle also creates in the liquid metal contained in the casting space convection movements which can have a harmful influence on the homogeneity of the cast product.
  • the purpose of the present invention is to solve the various problems mentioned above, and in particular to supply the ingot mold with liquid metal in a homogeneous manner over the entire width thereof.
  • the subject of the present invention is a device for supplying liquid metal to a mold for the continuous casting of thin products, the walls of which define a casting space, the cross section of which, at the outlet level of the product said ingot mold is elongated in a direction corresponding to the width of the cast product, and has a length equal to said width of the product.
  • this device is characterized in that it comprises a horizontal tubular nozzle in communication with at least one metal supply pipe, which extends in said direction corresponding to the width of the cast product, and comprises one or more liquid metal outlet orifices located in its lower part and in a configuration such that the said orifice (s) extend over the length of the nozzle and in that the said nozzle is situated at the level provided for the meniscus of the metal in the said ingot mold.
  • the total section of the outlet (s) for the liquid metal is greater than the outlet section of the ingot mold.
  • the device according to the invention has in particular three particular advantages.
  • this nozzle avoids contact of the liquid metal from the orifices with the ambient medium. Furthermore and above all, it makes it possible to limit the mechanical stresses to which the nozzle is subjected. Indeed, as the section of the casting space is very elongated, the length of the nozzle is important since it is desired that it covers as much as possible the width of the casting space (that is to say say the length of its section).
  • the tube constituting the nozzle is therefore of reduced external section which, combined with an internal section of the latter, as large as possible to limit the pressure drops and avoid clogging of the nozzle, resulting in a reduced wall thickness thereof.
  • the requirements of great length and small section of the nozzle therefore lead to a significant fragility of the latter made of refractory material little resistant to bending. If the nozzle were emerged, the risk of rupture would be significant, due to its own weight and especially the mass of metal it contains, while said nozzle is supported only by its ends or even only by one. Conversely, if the nozzle were completely submerged, it would be subjected by the cast metal to a significant Archimedes thrust due to the low density of the refractory which constitutes compared to that of the cast metal.
  • the arrangement according to the invention where the nozzle is located at the meniscus, preferably partially immersed, makes it possible to limit the mechanical stresses to which it is subjected, by regulating the level of metal in the ingot mold so as to substantially balance the forces s 'exercising on said nozzle.
  • the level in the ingot mold will therefore be regulated so that the assembly formed by the nozzle and the metal which it contains is almost "floating" on the surface of the liquid metal.
  • a third advantage resulting from the preferential arrangement where the total section of the outlet orifices is greater than the section of the cast product, is to limit the speed of exit of the metal through the orifices of the nozzle, and therefore to limit movements accordingly. convection of liquid metal in the mold.
  • the nozzle has several orifices substantially aligned along its lower generatrix, the section of each orifice increasing as a function of the distance between said orifice and the point of connection of said supply pipe on the nozzle.
  • the nozzle has a single orifice in the form of a longitudinal slot, the width of which increases with the distance from the connection point of said supply pipe on the nozzle.
  • the pressure drop of the metal flow in the tube can be compensated by the increase in the cross-section of the orifices or of the outlet slit in the zone furthest from the supply pipe, for that the flow of metal from each orifice, or from each zone of the slot, is substantially constant, thus guaranteeing the best possible homogeneity of supply over the entire width of the mold.
  • said metal supply pipe in the nozzle opens at one end thereof, or alternatively two supply pipes can be arranged which each open at one end of the nozzle.
  • This arrangement makes it possible in particular to feed the nozzle laterally with respect to the mold, through one of its "small walls” and therefore makes it possible to limit the ferrostatic pressure in said nozzle.
  • the casting installation shown in FIG. 1 comprises two cylinders 1 and 2 cooled and rotated in opposite directions, and two side walls, also called small faces 3, 4 held against the ends of the cylinders.
  • the installation comprises a distribution tank 7, located next to the cylinders.
  • This distribution tank communicates by a tube 8 for supplying the metal, which passes through the side wall 4 and opens into a supply nozzle 9.
  • This nozzle 9 extends horizontally in the casting space 6 over practically the entire width thereof, defined by the distance between the two side walls 3 and 4.
  • the nozzle 9 consists of a tube 10 made of refractory material , comprising in its lower part and over substantially its entire length a longitudinal slot 11.
  • the nozzle is located at level 14 of the meniscus of the liquid metal contained in the casting space.
  • the distribution tank 7 is supplied with liquid metal by a pouring tube 12 fixed to a bag or a dispenser, not shown, which contains the molten metal and is provided with a device for adjusting the flow rate of metal.
  • the liquid metal of the distribution tank flows through the supply pipe 8 into the nozzle 9 from where it leaves through the slot 11 to supply the pouring space.
  • the flow of liquid metal is permanently adjusted so as to maintain the level 14 of the metal 13 contained in the casting space at the level of the nozzle 9.
  • This metal solidified progressively in contact with the cooled walls of the cylinders 1 and 2, is pulled down due to the rotation of the cylinders to form the desired thin product 15.
  • the flow rate of the cast metal will be adjusted so that the nozzle 9 is partially immersed in the metal 13 contained in the casting space, which avoids subjecting it to strong mechanical stresses, as has been indicated previously.
  • the slot 11 of the nozzle has an elongated shape and its width varies as a function of the distance from the inlet pipe 8. As shown in FIG. 4, the width of the slot is small at its most close to said tube, and gradually increases to its other end 17. This arrangement makes it possible in particular to take account of the pressure drop of the liquid metal in the nozzle to ensure the most homogeneous flow possible over the entire length of this slot, and therefore across the width of the pouring space, in a way compensating for said pressure drop in the nozzle by an increased outlet section.
  • FIG. 5 represents a variant arrangement of the outlet orifices of the nozzle, constituted here by orifices 18 drilled radially in the tube 10 and aligned according to one of its generatices.
  • these orifices are of variable increasing section from one end 9 ′ of the neighboring nozzle of the supply tube 8 at the end 9 ⁇ furthest from the latter.
  • the variant shown in FIG. 3 relates to an installation in which the supply of liquid metal is carried out from two distribution tanks 7 and 7 ′ respectively on either side of the side walls 3 and 4. Each of these tanks is connected to one end of the nozzle 9 by the respective supply pipes 8 and 8 ′.
  • the nozzle then consists of a tube 10 ′ open at its two ends, extending over the entire width of the casting space and passing through each of the side walls 3, 4.
  • the outlet orifices 18 ′ of the nozzle consist of a plurality of holes aligned along a generatrix thereof and the cross section of which grows regularly from each of the ends of the nozzle towards the center of this one (see figure 6).
  • These orifices can likewise be produced in the form of a slot 11 ′ whose width increases from said ends towards the center as shown in FIG. 7.
  • the total section of said orifice (s) is preferably greater than the section of the cast product, that is to say the section of the space defined between the cylinders 1 and 2 and the side walls 3 and 4 , at the level of the neck 5, this in order to reduce as much as possible the speed of exit of the metal from said orifices to limit the convective movements of the liquid metal in the casting space.
  • the variation in the section of the orifices, or in the width of the slot, along the nozzle must be adapted precisely as a function of the dimensions of the nozzle and of the section of the cast product, and of the speed of extraction thereof. this.
  • the device can be adapted to supply the nozzle with a single supply pipe 8 ⁇ (FIG. 9), which can be connected directly to a single distributor located above the cylinders.
  • a single supply pipe 8 ⁇ (FIG. 9)
  • the tube 10 ⁇ forming the nozzle is closed at its two ends, and the supply pipe 8 ⁇ opens into the latter in its middle zone.
  • the arrangement of the outlet ports 18 ⁇ of the nozzle is then as shown in FIG. 8, where the section of the holes is minimal towards the middle of the nozzle and grows towards its ends.
  • This arrangement has the advantage of separating the nozzle from the side walls, but, as indicated above, can cause an increase in the ferrostatic pressure in the nozzle capable of increasing convection movements in the casting space.
  • the invention is not limited to the various variants of the device and to the method which have just been described by way of example.
  • the liquid metal flow rate can be adjusted to maintain the level in the pouring space only at the level of the outlet orifices of the nozzle, the latter therefore being practically not submerged. It is thus possible, in particular in the case of the use of such a nozzle in a conventional type ingot mold, the large walls of which are then substantially parallel and vertical, to avoid the formation of solidification bridges between the nozzle and said walls, due to the fact that the distance between the zones of the nozzle in contact with the cast metal (that is to say in this case only the edges of the slot or of the orifices of said nozzle) and said walls is then greater than the interval separating the external surface of the nozzle, up to its axis, from said walls.
  • the metal supply pipe in the nozzle does not pass through the side walls 4, as shown in FIG. 9, adjust the position of the nozzle according to the level of the liquid metal in the ingot mold to keep the nozzle partially immersed in the liquid metal or to maintain the outlet orifices of the nozzle at said level.
  • the metal level in the ingot mold can be adjusted according to the various casting parameters, and the position of the nozzle will be adjusted according to this level, for example by detecting this level and regulating, according to this measure, the height of the distributor, or of a tank dispenser, which carries said nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP90470029A 1989-05-31 1990-05-21 Vorrichtung und Verfahren zur Zuführung flüssigen Metalls an einer Stranggiessanlage für dünne metallische Produkte Withdrawn EP0401144A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8907286A FR2647698A1 (fr) 1989-05-31 1989-05-31 Dispositif d'alimentation en metal liquide d'une installation de coulee continue de produits minces et procede pour sa mise en oeuvre
FR8907286 1989-05-31

Publications (1)

Publication Number Publication Date
EP0401144A1 true EP0401144A1 (de) 1990-12-05

Family

ID=9382291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470029A Withdrawn EP0401144A1 (de) 1989-05-31 1990-05-21 Vorrichtung und Verfahren zur Zuführung flüssigen Metalls an einer Stranggiessanlage für dünne metallische Produkte

Country Status (8)

Country Link
EP (1) EP0401144A1 (de)
JP (1) JPH0327846A (de)
KR (1) KR900017690A (de)
AU (1) AU5606390A (de)
BR (1) BR9002556A (de)
CA (1) CA2017043A1 (de)
DD (1) DD294645A5 (de)
FR (1) FR2647698A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0765702A1 (de) * 1995-09-28 1997-04-02 USINOR SACILOR Société Anonyme Eintauchausguss zum Einbringen von Metallschmelze in einer Stranggusskokille
FR2740367A1 (fr) * 1995-10-30 1997-04-30 Usinor Sacilor Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue de produits metalliques, dont le fond comporte des orifices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2597762B2 (ja) * 1991-03-18 1997-04-09 日立造船株式会社 薄板連続鋳造設備における注湯装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR702148A (fr) * 1930-08-22 1931-03-30 Perfectionnements au moulage des métaux et alliages fondus
FR835886A (fr) * 1937-04-10 1939-01-05 Perfectionnements aux procédés et aux appareils de traitement des métaux fondus facilement oxydables, dans le but d'obetnir, à partir de ces métaux, une bande continue pleine
FR2137471A1 (de) * 1971-05-19 1972-12-29 Inst Sp
WO1988002288A1 (en) * 1986-09-30 1988-04-07 Concast Standard Ag Process and device for casting thin strip or foil from a molten mass
FR2619032A3 (fr) * 1987-08-05 1989-02-10 Siderurgie Fse Inst Rech Procede et dispositif d'alimentation en metal liquide d'une installation de coulee continue de produits minces en lingotiere a parois mobiles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103761A (en) * 1980-12-17 1982-06-28 Matsushita Electric Ind Co Ltd Multipored nozzle for production of strip

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR702148A (fr) * 1930-08-22 1931-03-30 Perfectionnements au moulage des métaux et alliages fondus
FR835886A (fr) * 1937-04-10 1939-01-05 Perfectionnements aux procédés et aux appareils de traitement des métaux fondus facilement oxydables, dans le but d'obetnir, à partir de ces métaux, une bande continue pleine
FR2137471A1 (de) * 1971-05-19 1972-12-29 Inst Sp
WO1988002288A1 (en) * 1986-09-30 1988-04-07 Concast Standard Ag Process and device for casting thin strip or foil from a molten mass
FR2619032A3 (fr) * 1987-08-05 1989-02-10 Siderurgie Fse Inst Rech Procede et dispositif d'alimentation en metal liquide d'une installation de coulee continue de produits minces en lingotiere a parois mobiles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 196 (M-161)[1074], 5 octobre 1982, page 121 M 161; & JP-A-57 103 761 (MATSUSHITA DENKI SANGYO K.K.) 28-06-1982 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0765702A1 (de) * 1995-09-28 1997-04-02 USINOR SACILOR Société Anonyme Eintauchausguss zum Einbringen von Metallschmelze in einer Stranggusskokille
FR2739313A1 (fr) * 1995-09-28 1997-04-04 Usinor Sacilor Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue des metaux
US5733469A (en) * 1995-09-28 1998-03-31 Usinor Sacilor Nozzle for introducing a liquid metal into a mold for continuous casting of metals
CN1064286C (zh) * 1995-09-28 2001-04-11 于西纳公司 把液体金属引入金属连铸模具的喷嘴
FR2740367A1 (fr) * 1995-10-30 1997-04-30 Usinor Sacilor Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue de produits metalliques, dont le fond comporte des orifices
EP0771600A1 (de) * 1995-10-30 1997-05-07 Usinor Sacilor Tauchausguss mit Bodenöffnungen zum Einbringen von Metallschmelze in eine Kokille für das Stranggiessen metallischer Produkte
US5840206A (en) * 1995-10-30 1998-11-24 Thyssen Stahl Aktiengesellschaft Nozzle for introducing a liquid metal into a mold, for the continuous casting of metal products, the bottom of which has holes
CN1068807C (zh) * 1995-10-30 2001-07-25 犹齐诺-萨西洛公司 将液态金属引入金属制品连铸铸模的底部带孔的喷嘴

Also Published As

Publication number Publication date
JPH0327846A (ja) 1991-02-06
KR900017690A (ko) 1990-12-19
AU5606390A (en) 1990-12-06
BR9002556A (pt) 1991-08-13
CA2017043A1 (fr) 1990-11-30
DD294645A5 (de) 1991-10-10
FR2647698A1 (fr) 1990-12-07

Similar Documents

Publication Publication Date Title
FR2626508A1 (fr) Moule de coulee de metaux, equipe d'un manchon contenant un filtre
CA2186084C (fr) Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue des metaux
FR2529476A1 (fr) Cellule de flottation
WO1987000099A1 (fr) Procede et machine de coulee continue d'un produit metallique mince
EP0401144A1 (de) Vorrichtung und Verfahren zur Zuführung flüssigen Metalls an einer Stranggiessanlage für dünne metallische Produkte
EP0092477A1 (de) Verfahren und Vorrichtung zur Herstellung von Hohlblöcken aus Stahl
EP0187609B1 (de) Vorrichtung zur rotierenden Zufuhr einer Schmelze bei einer Vertikal-Stranggiessanlage für Rohre aus Kugelgraphitgusseisen
EP0950451B1 (de) Giessrohr zum Einführen von Metallschmelze in eine Strangiesskokille
FR2523006A1 (fr) Filiere tubulaire pour la coulee continue d'un tube, a paroi mince, en fonte
EP0743114B2 (de) Verfahren zur Schmierung der Wände einer Stranggusskokille für Metalle und Kokille zur Durchführung dieses Verfahrens
EP0407323B1 (de) Verfahren und Vorrichtung zum Stranggiessen mit Doppelrollen von dünnen metallischen Produkten, geeignet zum Kaltwalzen
WO2006108874A1 (fr) Procede pour la coulee continue d'ebauches de profiles en metal
EP0891236B1 (de) Vertikal-stranggiesskokille mit aufsatz
EP1351786B1 (de) Mit einem stab zur einleitung von metallschmelze in eine kokille für das stranggiessen von metall versehene düse
EP0943380A1 (de) Verfahren und Vorrichtung zum Stranggiessen von Metallen
WO1994011135A1 (fr) Procede pour epurer du metal liquide dans un recipient metallurgique de transvasement equipe d'au moins deux filtres
FR2526689A1 (fr) Procede et appareil pour la coulee continue ou semi-continue de lingots de metal
CA2003609A1 (fr) Procede et ensemble d'alimentation en metal fondu de la lingotiere d'une installation de coulee continue d'ebauches minces
CA2251007C (fr) Procede de coulee continue des metaux et installation de coulee pour sa mise oeuvre
FR2496514A1 (fr) Dispositif de coulee centrifuge
FR2619032A3 (fr) Procede et dispositif d'alimentation en metal liquide d'une installation de coulee continue de produits minces en lingotiere a parois mobiles
EP0545770A1 (de) Verfahren und Vorrichtung zum Stranggiessen mit Doppelrollen von dünnen Metallbänder
FR2607738A3 (fr) Dispositif pour l'alimentation en metal en fusion des lingotieres de coulee continue
BE1001298A6 (fr) Dispositif de fabrication en continu d'une bande metallique mince.
EP0452294B1 (de) Verfahren und Vorrichtung zum Stranggiessen eines Metalls

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): AT BE CH DE DK ES GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19910525

17Q First examination report despatched

Effective date: 19920812

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: 19921130