EP0950451B1 - Busette pour l'introduction de métal liquide dans une lingotière de coulée continue des métaux - Google Patents

Busette pour l'introduction de métal liquide dans une lingotière de coulée continue des métaux Download PDF

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Publication number
EP0950451B1
EP0950451B1 EP99400736A EP99400736A EP0950451B1 EP 0950451 B1 EP0950451 B1 EP 0950451B1 EP 99400736 A EP99400736 A EP 99400736A EP 99400736 A EP99400736 A EP 99400736A EP 0950451 B1 EP0950451 B1 EP 0950451B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
liquid metal
bar
strip
section
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
EP99400736A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0950451A1 (fr
Inventor
Fabienne Orihel
Bernard Goncalves
Laurent Gacher
Frédéric Descaves
Johan Richaud
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.)
USINOR SA
Vesuvius France SA
Original Assignee
USINOR SA
Vesuvius France SA
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Publication date
Application filed by USINOR SA, Vesuvius France SA filed Critical USINOR SA
Publication of EP0950451A1 publication Critical patent/EP0950451A1/fr
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Publication of EP0950451B1 publication Critical patent/EP0950451B1/fr
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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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • 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
    • B22D11/0642—Nozzles

Definitions

  • the invention relates to the continuous casting of metals. It concerns more precisely the nozzles of refractory material through which the liquid metal is introduced to be cast, such as steel, in the ingot mold of a continuous casting installation, in particular of a casting between cylinders.
  • These nozzles are connected by their upper end to the container serving as tank of liquid metal, called a distributor, and their lower end plunges into the bath of liquid metal present in the mold where the solidification of the cast product.
  • the primary role of these nozzles is to protect from atmospheric oxidation the jet of liquid metal on its path between the container and the ingot mold. They allow also, thanks to appropriate configurations of their lower end, to orient favorably the flows of the liquid metal in the ingot mold so that the solidification of the product is carried out under the best possible conditions.
  • Directly pouring thin metal strips a few mm thick from liquid metal can take place on an installation called "casting between cylinders". It includes an ingot mold whose casting space is delimited on its long sides by a pair of internally cooled cylinders with axes horizontal parallel and rotating around these axes in opposite directions, and on its short sides by closing plates (called side faces) of refractory material applied against the ends of the cylinders.
  • the cylinders can also be replaced by cooled endless belts.
  • the first part consists of a tube cylindrical, the upper end of which is connected to an opening in the bottom of the distributor which constitutes the reserve of liquid steel supplying the ingot mold.
  • This orifice is can be closed at will by the operator, partially or completely, thanks to a stopper or a drawer system ensuring the regulation of the metal flow. From the section of this hole depends on the maximum metal flow that can flow inside the nozzle.
  • the second part fixed to the lower end of the preceding tube, for example by screwing, or being built-in construction, is intended to be immersed in the liquid metal bath present in the mold.
  • the interior space of this hollow element has a general shape more or less elongated according to the dimensions of the casting space of the machine on which the nozzle is to be mounted. It is oriented substantially perpendicular to the tube.
  • the hollow element When the nozzle is in service, the hollow element is placed parallel to the cylinders, and the liquid metal flows into the mold through gills formed on the sides of the hollow element, generally at each of its ends.
  • the metal flows leaving the nozzle are thus oriented preferably in the direction of the lateral faces, in order to bring hot metal onto their surfaces, thereby preventing unwanted metal solidifications from occurring there (so-called "parasitic solidifications") which would seriously disturb the functioning of the machine.
  • the gills can have a horizontal or oblique downward orientation.
  • Various orifices of lesser importance than these openings can also be provided on the side walls and / or the bottom of the nozzle, in order to directly supply hot metal the regions of the mold located on the sides of the nozzle and / or under it. So we aim, in particular, to improve the thermal homogeneity of the metal present in the mold.
  • a strip that is to say a parallelepipedic element elongated in porous or perforated refractory placed inside the second part of the nozzle (the hollow element), and that the liquid metal must pass through before reaching all or part of the various orifices opening into the casting space of the ingot mold (see document JP-A-1-317658).
  • the nozzle has on the one hand a perforated strip and on the other hand orifices formed in the bottom and / or the side walls of its second elongated part (in addition to vents directed towards the short sides of the casting space), it is important that these various orifices are supplied with liquid metal uniformly over the entire length of said second part. Only on this condition can we guarantee satisfactory homogeneity of the metal flows inside the casting space. However, tests on hydraulic models show that this condition is not generally not satisfied when using a very elongated nozzle, particularly suitable for use on a casting installation of very wide thin strips (of the order of 1 m and more), and equipped with a perforated parallelepiped strip.
  • the object of the invention is to propose a nozzle configuration of the type which just described, which provides a metal supply to the most homogeneous possible over its entire length.
  • the invention relates to a nozzle for the introduction of a metal liquid in a continuous metal casting ingot mold, of the type comprising a first tubular part, one end of which is intended to be connected to a container containing said liquid metal, and the other end of which opens into a second part hollow of elongated shape of which at least a portion of the space is oriented substantially perpendicular to said first tubular part, said hollow part having a hole at each of its ends, as well as one or more outlet openings formed in its bottom and / or its side walls, a strip provided with perforations being arranged in the interior space of said hollow part so that the liquid metal must pass through said perforations before passing through said outlet orifices, as described in document EP 0 771 600, and is characterized in that said strip comprises over at least a portion of the width of its upper face a part in relief comprising a vertex situated on the horizontal axis longitudinal of said hollow part, said perforations being distributed on both sides of said summit.
  • the invention consists in providing on the upper face of the strip a part in relief over at least a portion of its width.
  • This part in relief must have a substantially triangular or rounded cross section, so that to “burst” the metal jet which strikes it and to distribute said metal so symmetrical on the cross section of the nozzle, preventing it from rebounding vertically by disturbing the regularity of the flows.
  • Another variant would be to add to the outlet ports 7-17 (or to their substitute) orifices formed in the large side walls of the hollow element 4, and oriented towards the long sides of the pouring space (in other words towards the cylinders in the case of a casting installation between cylinders).
  • These holes 7-17 can also not be strictly cylindrical, but have a section for example elliptical. They can also (in particular according to one of the variants of EP-A-0 771 600) be obliquely oriented. Finally, they can be replaced by one or more slots each extending over part or all of the length of the bottom 18 of the element trough 4, and which it would be important for them to be supplied in a homogeneous manner over their entire length.
  • the nozzle 1 also has, arranged in its interior space 3, a perforated strip 19 resting on shoulders 36 formed on the walls of the gills 5, 6. Its function is, as is known, to create pressure drops in the liquid metal, so as to better fill the interior space 3, and thereby regularize the liquid metal flows out of the nozzle 1.
  • this strip 19 has a shape different from the classic parallelepiped shape, in that it has a raised part 20 whose top is intended to be located on the longitudinal horizontal axis hollow part 4 of the nozzle 1. In the example shown in Figures la and 1b, this raised part 20 relates only to the central portion of the width of the upper face 21 of the strip 19, and has a triangular cross section whose dimensions do not not vary over the length of the strip 19.
  • this upper face 21 The remaining parts of this upper face 21 are flat, and it is on these flat parts, flush with the raised part 20, that are formed the perforations 22, 22 ', 23-34 which the liquid metal must pass through before reach the lower part 35 of the interior space 3 of the nozzle 1, then drain out of the nozzle 1 through the lower part of the openings 5, 6 and the orifices 7-17.
  • part of the metal can flow out of the nozzle 1 through the upper part of the gills 5, 6, therefore without having passed through the perforations 23-34 of the strip 19.
  • the metal which flows out of the nozzle 1 through the orifices exit 7-17 must have previously crossed the perforations 23-34 of the strip 19.
  • the cross section of the part in relief 20 of the strip 19 may have the shape of a triangle whose tip has been leveled, and thus present a flat part 36 at its top.
  • the representation of the nozzle 1 is only schematic, and that only the elements and details necessary for understanding the invention appear therein.
  • the tube cylindrical 2 and the hollow element 4 can be fixed to each other by screwing.
  • the external shape of the hollow element 4 of the nozzle 1 is only a non-limiting example and can be modified.
  • FIG. 2 represents a variant of a strip according to the invention, in which the raised part 37, of triangular cross section, covers the entire width of the strip 38.
  • the top of the raised part 37 can also be leveled, in a manner comparable to what we observe on the variant of figure 1c.
  • Figure 3 shows a variant of the configuration of Figure 2: the strip 39 has a raised portion 40 of cross section triangular, and whose thickness decreases between its middle and its ends.
  • This variable thickness configuration of the raised part 40 can also be adapted to the case of Figure 1, where the raised portion 20 covers only the central portion of the width of the strip 19.
  • FIG. 4 shows an example of a strip 41, the raised part 42 of which also has a triangular section, but a rounded section.
  • the raised portion 42 can cover the entire upper face of the strip 40 (as shown), or only a portion of this upper face, and its thickness may be identical over the entire length of the strip 40, or decrease between its central part and its ends.
  • FIG. 5 shows an example of a strip 43, in which the part in relief 44 covers only a central portion of the upper surface of the strip 43, and has a rectangular cross section at its base and triangular at its top.
  • said upper surface has bevelled edges 45, 46.
  • the positions of the strip can be modified according to the internal geometry of the nozzle. Instead of being placed inside the louvers as shown, it can be placed entirely above or below gills, the main thing being that liquid metal must pass through it before flow out of the nozzle through the outlet openings in the bottom of the element hollow.
  • the nozzle may also have other obstacles, in addition to the strip.
  • the following test results can be given. They were produced on a hydraulic model where the configurations of a nozzle 1 have been reproduced, the hollow element 4 of which has a length of 700 mm and an internal width of 54 mm, and is provided with a strip having the same length. and width.
  • the strip has a strictly parallelepiped shape and a thickness of 20 mm. It has two rows of cylindrical perforations 12 mm in diameter, the axes of which are placed at a distance of 15 mm from the edges of the strip. These perforations have their axes 24 mm apart, and the axes of the perforations closest to the ends of the strip are located 35 mm from said ends.
  • the strip is of the type 19 shown in FIGS. 1a and 1b, with a raised central part of triangular cross section 20, the apex of which overhangs the upper face of the strip 19 by 20 mm.
  • the perforations are arranged in the same way as for the reference strip.
  • the bottom of the hollow element 4 comprises in both cases a central row of 26 orifices comparable to the orifices 7-17 of FIG. 1a. The proportion of water passing through the nozzle 1 which exited therefrom through each of the openings 5, 6 and through each of the orifices at the bottom of the hollow element 4 was measured on the model.
  • the holes in the bottom of the nozzle are very unevenly supplied: a proportion of the liquid flow passes through them which varies from 0.9 to 2.6% (0.9 to 2.2% if the two central orifices are not taken into account numbered 13 and 14 which it is normal for them to be supplied in a privileged manner since they are located directly above the casting jet).
  • the dispersion of the flow rates is much less: they vary from 1.7 to 3.0% (1.7 2.3% if the central holes are not taken into account).
  • the nozzle according to the invention finds a preferred application in installations for the continuous casting of thin strips of steel between cylinders. But it can also be used on continuous product casting installations metallurgical of other formats and / or other metals, for which great regularity metal feed to the pouring space is helpful.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Nozzles (AREA)
  • Electroplating Methods And Accessories (AREA)
EP99400736A 1998-04-16 1999-03-26 Busette pour l'introduction de métal liquide dans une lingotière de coulée continue des métaux Expired - Lifetime EP0950451B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804706 1998-04-16
FR9804706A FR2777485B1 (fr) 1998-04-16 1998-04-16 Busette pour l'indroduction de metal liquide dans une lingotiere de coulee continue des metaux

Publications (2)

Publication Number Publication Date
EP0950451A1 EP0950451A1 (fr) 1999-10-20
EP0950451B1 true EP0950451B1 (fr) 2003-05-07

Family

ID=9525277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400736A Expired - Lifetime EP0950451B1 (fr) 1998-04-16 1999-03-26 Busette pour l'introduction de métal liquide dans une lingotière de coulée continue des métaux

Country Status (24)

Country Link
US (1) US6092700A (zh)
EP (1) EP0950451B1 (zh)
JP (1) JP4235857B2 (zh)
KR (1) KR100586217B1 (zh)
CN (1) CN1103255C (zh)
AT (1) ATE239571T1 (zh)
AU (1) AU737169B2 (zh)
BR (1) BR9902363A (zh)
CA (1) CA2269021C (zh)
CZ (1) CZ293473B6 (zh)
DE (1) DE69907562T2 (zh)
DK (1) DK0950451T3 (zh)
ES (1) ES2199531T3 (zh)
FR (1) FR2777485B1 (zh)
IN (1) IN190454B (zh)
PL (1) PL189440B1 (zh)
PT (1) PT950451E (zh)
RO (1) RO120388B1 (zh)
RU (1) RU2205092C2 (zh)
SK (1) SK284778B6 (zh)
TR (1) TR199900772A2 (zh)
TW (1) TW486394B (zh)
UA (1) UA61931C2 (zh)
ZA (1) ZA992616B (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656568A (en) * 1995-08-11 1997-08-12 Advanced Minerals Corporation Highly purified biogenic silica product
CH691762A5 (de) 2000-06-28 2001-10-15 Main Man Inspiration Ag Zwischenbehälter mit einer feuerfesten Giessrohreinheit für das Abgiessen von Metallschmelze in eine Bandgiessmaschine sowie eine Giessrohreinheit.
FR2818567B1 (fr) * 2000-12-22 2003-03-28 Usinor Busette equipee d'une reglette pour l'introduction de metal liquide dans une lingotiere de coulee continue des metaux
JP2005230826A (ja) * 2004-02-17 2005-09-02 Ishikawajima Harima Heavy Ind Co Ltd 溶湯供給ノズル
ATE462512T1 (de) * 2006-12-14 2010-04-15 Mkm Mansfelder Kupfer Und Mess Verfahren und vorrichtung zur herstellung von breiten bändern aus kupfer oder kupferlegierungen
CN100453209C (zh) * 2007-04-29 2009-01-21 濮阳濮耐高温材料（集团）股份有限公司 具有熔融金属导分流装置的中间包
EP2788134A4 (en) 2011-12-09 2016-03-16 Nucor Corp CASTING DISTRIBUTION NOZZLE
CN103611897B (zh) * 2013-12-09 2015-10-28 云南铝业股份有限公司 一种生产宽幅铸轧板用熔体流热场的调控装置
CN105195698B (zh) * 2014-06-24 2017-11-03 晟通科技集团有限公司 铸嘴装置
JP6577841B2 (ja) * 2015-11-10 2019-09-18 黒崎播磨株式会社 浸漬ノズル

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1094517A (fr) * 1953-11-25 1955-05-20 Installation de coulée pour métaux en fusion
JPS6021171A (ja) * 1983-07-16 1985-02-02 Nisshin Steel Co Ltd 幅広薄板連続鋳造装置
JPH01317658A (ja) * 1988-06-17 1989-12-22 Nippon Steel Corp 金属薄帯の連続鋳造用ノズル
JPH07290203A (ja) * 1994-04-26 1995-11-07 Nippon Steel Corp 双ドラム式連続鋳造機の注入用横吹出しノズル
JP3262483B2 (ja) * 1995-09-26 2002-03-04 富士写真光機株式会社 オートフォーカスカメラの投光窓
FR2739313B1 (fr) * 1995-09-28 1997-10-31 Usinor Sacilor Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue des metaux
FR2740367B1 (fr) * 1995-10-30 1997-11-28 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

Also Published As

Publication number Publication date
ZA992616B (en) 1999-10-08
TW486394B (en) 2002-05-11
SK284778B6 (sk) 2005-11-03
JP4235857B2 (ja) 2009-03-11
FR2777485A1 (fr) 1999-10-22
CN1103255C (zh) 2003-03-19
CA2269021A1 (fr) 1999-10-16
PL189440B1 (pl) 2005-08-31
BR9902363A (pt) 2000-01-04
TR199900772A3 (tr) 1999-11-22
CA2269021C (fr) 2008-01-08
CN1235075A (zh) 1999-11-17
CZ293473B6 (cs) 2004-05-12
FR2777485B1 (fr) 2000-05-19
KR100586217B1 (ko) 2006-06-07
AU2244699A (en) 1999-10-28
ES2199531T3 (es) 2004-02-16
UA61931C2 (en) 2003-12-15
AU737169B2 (en) 2001-08-09
KR19990083162A (ko) 1999-11-25
SK47999A3 (en) 2000-05-16
JPH11342455A (ja) 1999-12-14
TR199900772A2 (xx) 1999-11-22
IN190454B (zh) 2003-08-02
RO120388B1 (ro) 2006-01-30
PL332588A1 (en) 1999-10-25
ATE239571T1 (de) 2003-05-15
EP0950451A1 (fr) 1999-10-20
CZ9901286A3 (cs) 2000-10-11
PT950451E (pt) 2003-09-30
DE69907562T2 (de) 2004-02-19
US6092700A (en) 2000-07-25
DE69907562D1 (de) 2003-06-12
DK0950451T3 (da) 2003-09-01
RU2205092C2 (ru) 2003-05-27

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