EP0418182B1 - Vorrichtung zum Stranggiessen von dünnen metallischen Produkten zwischen Zylindern - Google Patents

Vorrichtung zum Stranggiessen von dünnen metallischen Produkten zwischen Zylindern Download PDF

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Publication number
EP0418182B1
EP0418182B1 EP90470047A EP90470047A EP0418182B1 EP 0418182 B1 EP0418182 B1 EP 0418182B1 EP 90470047 A EP90470047 A EP 90470047A EP 90470047 A EP90470047 A EP 90470047A EP 0418182 B1 EP0418182 B1 EP 0418182B1
Authority
EP
European Patent Office
Prior art keywords
header
walls
rolls
cylinders
counterweight
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
EP90470047A
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English (en)
French (fr)
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EP0418182A1 (de
Inventor
Laurent Sosin
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
Original Assignee
USINOR Sacilor SA
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 USINOR Sacilor SA filed Critical USINOR Sacilor SA
Priority to AT90470047T priority Critical patent/ATE95734T1/de
Publication of EP0418182A1 publication Critical patent/EP0418182A1/de
Application granted granted Critical
Publication of EP0418182B1 publication Critical patent/EP0418182B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention relates to the continuous casting of thin metallic products, in particular steel, between cylinders according to the preamble of claim 1, which is based on JP-A-6076256.
  • the liquid metal is poured into the casting space defined by the portions of the cylindrical walls of the cylinders situated above the plane passing through the parallel axes of said cylinders, and by sealing end walls, also called small faces or side walls.
  • the liquid metal gradually solidifies on contact with the cooled cylindrical walls of the cylinders, forming solidified skins which are driven by the rotating cylinders and meet at the neck, that is to say at the said level. plane passing through the axes of the cylinders, to form the finished product which is continuously extracted downwards.
  • these installations also include a sort of fixed extension consisting of two longitudinal walls in tight contact with the cylinders and two front walls extending upwards said small faces or forming an integral part thereof.
  • This enhancement will hereinafter be designated by the term “feeder” by analogy with the part surmounting the ingot mold or the mold and intended to contain the withdrawal feeder in the casting installations in fixed ingot mold or molding.
  • This "flyweight” has the particular function, in the case of casting between cylinders, of delimiting the cylinder surface on which the solidification of the cast metal takes place, and thus ensuring the regularity of this solidification, whatever the level of the metal in the counterweight.
  • the meniscus of the liquid metal is no longer in contact with the walls of the cylinders, the risk of entrainment of impurities floating on the meniscus is thus considerably reduced.
  • This counterweight is proposed in a refractory material with high heat insulating properties which, as is known, are therefore not compatible with a high mechanical resistance of the walls of the counterweight. In certain cases, such as the use of a liquid metal supply nozzle equipped with lateral outlets oriented towards the walls of the counterweight, this mechanical resistance may be insufficient in the areas most stressed by the liquid metal currents.
  • the object of the invention is to provide a counterweight compatible with the use of a nozzle with lateral outlets and having satisfactory thermal properties.
  • the subject of the invention is an installation for continuous casting of thin metallic products between cylinders cooled in rotation, of the type comprising a counterweight cooperating with the cylinders and the small faces to define the casting space, characterized in that the longitudinal walls of the counterweight in contact with the cylinders consist of a refractory with high insulating properties, and in that the front walls of the counterweight in contact with the small faces consist of a refractory with high mechanical resistance.
  • the invention consists in using, to constitute the front walls of the counterweight, a refractory capable of withstanding the mechanical stresses undergone by the metal jets coming from the nozzle, this refractory being able to be less insulating than the one forming the longitudinal walls of the counterweight.
  • the pouring space delimited by the cylinders, the small faces and the counterweight, is supplied by a nozzle plunging into the liquid metal well, connected to a distributor placed above the machine and containing the liquid metal to be poured.
  • this nozzle is straight in shape and has a single opening at its end.
  • the metal therefore enters the liquid well in a vertical direction up to a variable depth depending on the geometric characteristics of the machine and the hydrodynamic parameters of its supply.
  • the main drawback of such a device is that the liquid metal, shortly after leaving the nozzle, risks licking the cylinders, on which the solidified skin is being formed. On contact with hot metal coming directly from the distributor, the solidified skin partially recovers, which leads to significant risks of rupture of this skin at the center of the cylinders and below.
  • a counterweight and a nozzle provided with at least one opening oriented laterally so that the metal entering the casting space does not reach the cylinders until to have circulated in the liquid well and lost much of its overheating and kinetic energy.
  • An example of such a nozzle consists of a nozzle with two openings oriented in opposite directions on the same horizontal axis or on two substantially horizontal axes, and emerging inside the counterweight, that is to say above the area where the metal solidifies on the cylinders. In such a device, the metal streams coming from the nozzle will first strike the walls of the counterweight. These must therefore have sufficient mechanical strength.
  • the walls of the counterweight are made of a material having good insulating properties, such as silica foam of density 0.5 or 0.75 g / cm 3 or an aluminous fibrous refractory. It is, in fact, essential that the refractories in contact with the cylinders be as insulating as possible, because they tend to cool by conduction in the area where this contact takes place. If this cooling is too great, it may result in the formation at this location of a layer of solidified metal which gradually increases. Because of this phenomenon, the constancy of the conditions of arrival of the liquid metal on the cylinders is no longer adequately ensured. In addition, this solidified layer can come off periodically, causing the formation of defects on the product.
  • a material having good insulating properties such as silica foam of density 0.5 or 0.75 g / cm 3 or an aluminous fibrous refractory.
  • the mechanical resistance of these materials is an inverse function of their insulating power. If the walls of the counterweight are subjected to the shock of a flow of liquid metal leaving one of the horizontal openings of the nozzle, there is a significant risk of deterioration of these walls.
  • a dense refractory with higher mechanical resistance is used to constitute the front walls of the feeder cooperating with the small faces of the machine.
  • the inventors believe that the insulating properties of these front walls are of relatively low importance.
  • Figure 2 highlights the vertical arrangement of the machine elements. It shows the liquid metal well 8 whose meniscus 9 is located inside the counterweight 2 and, therefore, above the cylinders 1,1 ′.
  • the liquid metal solidifies against the walls of the cylinders 1,1 ′ in opposite rotation and gives rise to a solid product 10.
  • the flyweight 2 is in contact on the one hand with the cylinders 1,1 ′ through its walls longitudinal 3,3 ′ in insulating refractory, and on the other hand, with the small lateral faces closing off the casting space (only one of which is visible in FIG. 2), by means of its front walls 4,4 ′ In resistant refractory.
  • the nozzle 6 plunges into the liquid well 8 and its openings 7,7 ′ open inside the counterweight 2, that is to say above the upper edges 12 of the small faces 11 and of the lower edges 13,13 ′ Of the longitudinal walls of the counterweight.
  • the invention is not limited to the example described and shown.
  • the front walls of the counterweight may not be placed on the small faces, but be integral parts of these.
  • the pouring nozzle may have a shape and a number of openings other than those of the example, the main thing being that it does not direct the flow of metal at high speed towards the longitudinal walls. insulating weights.
  • the method is applicable to weights of variable dimensions used on machines whose cylinders can be moved along their axes, in order to vary the width of the cast product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Tunnel Furnaces (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Claims (4)

  1. Vorrichtung zum Stranggießen von dünnen metallischen Produkten zwischen sich drehenden gekühlten Rollen (1, 1'), mit einem mit den Rollen (1, 1') zusammenwirkenden Gießaufsatz (2) und mit kleinen Flächen (11), um einen Gießraum zu bilden, dadurch gekennzeichnet, daß die Längswände (3, 3') des Gießaufsatzes (2), welche die Rollen (1, 1') berühren, aus einem feuerfesten Material mit erhöhten thermoisolierenden Eigenschaften bestehen, und daß die Vorderwände (4, 4') des Gießaufsatzes (2), welche die kleinen Flächen (11) berühren, aus einem feuerfesten Material mit erhöhter mechanischer Widerstandsfähigkeit bestehen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine Zufuhrdüse (6) für das flüssige Metall aufweist, welche mit zwei seitlichen Auslässen (7, 7') versehen ist, deren jeder in Richtung einer der Vorderwände (4, 4') des Gießaufsatzes gerichtet ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das die Längswände (3, 3') des Gießaufsatzes bildende feuerfeste Material eine thermische Leitfähigkeit aufweist, welche kleiner ist als 0,5 W/m.K bei 1000°C.
  4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das die Vorderwände (4, 4') des Gießaufsatzes bildende feuerfeste Material eine scheinbare Rohdichte aufweist von mehr als 1,5 kg/dm³.
EP90470047A 1989-09-06 1990-08-20 Vorrichtung zum Stranggiessen von dünnen metallischen Produkten zwischen Zylindern Expired - Lifetime EP0418182B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90470047T ATE95734T1 (de) 1989-09-06 1990-08-20 Vorrichtung zum stranggiessen von duennen metallischen produkten zwischen zylindern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911737 1989-09-06
FR8911737A FR2651455B1 (fr) 1989-09-06 1989-09-06 Dispositif de coulee continue de produits metalliques minces entre cylindres.

Publications (2)

Publication Number Publication Date
EP0418182A1 EP0418182A1 (de) 1991-03-20
EP0418182B1 true EP0418182B1 (de) 1993-10-13

Family

ID=9385236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470047A Expired - Lifetime EP0418182B1 (de) 1989-09-06 1990-08-20 Vorrichtung zum Stranggiessen von dünnen metallischen Produkten zwischen Zylindern

Country Status (23)

Country Link
US (1) US5092391A (de)
EP (1) EP0418182B1 (de)
JP (1) JPH0399758A (de)
KR (1) KR910005949A (de)
CN (1) CN1022295C (de)
AT (1) ATE95734T1 (de)
AU (1) AU633347B2 (de)
BR (1) BR9004425A (de)
CA (1) CA2024676A1 (de)
CS (1) CS424690A2 (de)
DD (1) DD297580A5 (de)
DE (1) DE69003917T2 (de)
DK (1) DK0418182T3 (de)
ES (1) ES2045873T3 (de)
FI (1) FI90743C (de)
FR (1) FR2651455B1 (de)
HU (1) HU208268B (de)
IE (1) IE903215A1 (de)
NO (1) NO903849L (de)
PL (1) PL286771A1 (de)
PT (1) PT95221A (de)
RU (1) RU1836180C (de)
ZA (1) ZA907060B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2696960B1 (fr) * 1992-10-16 1994-11-25 Usinor Sacilor Dispositif de coulée continue entre cylindres de produits métalliques minces.
ITMI20031356A1 (it) * 2003-07-02 2005-01-03 Danieli Off Mecc Dispositivo di alimentazione di metallo fuso in cristallizzatore.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58176059A (ja) * 1982-04-07 1983-10-15 Hitachi Zosen Corp ツインモ−ルドロ−ラ連続鋳造設備における鋳片引き抜き法
JPS6021170A (ja) * 1983-07-15 1985-02-02 Nisshin Steel Co Ltd 連続鋳造用ノズル
JPS6021171A (ja) * 1983-07-16 1985-02-02 Nisshin Steel Co Ltd 幅広薄板連続鋳造装置
JPS6076256A (ja) * 1983-09-30 1985-04-30 Hitachi Zosen Corp ツインモ−ルドロ−ラ形連続鋳造設備における鋳型
JP2528284B2 (ja) * 1986-07-04 1996-08-28 横浜ゴム株式会社 タイヤトレッド用ゴム組成物
JPS63126646A (ja) * 1986-11-17 1988-05-30 Nippon Mining Co Ltd 双ロ−ル式連続鋳造用ダム

Also Published As

Publication number Publication date
DD297580A5 (de) 1992-01-16
CS424690A2 (en) 1991-11-12
FI90743C (fi) 1994-03-25
FR2651455A1 (fr) 1991-03-08
HU905043D0 (en) 1991-01-28
DK0418182T3 (da) 1994-02-21
HU208268B (en) 1993-09-28
DE69003917T2 (de) 1994-04-07
BR9004425A (pt) 1991-09-10
FI90743B (fi) 1993-12-15
CA2024676A1 (fr) 1991-03-07
HUT57101A (en) 1991-11-28
RU1836180C (ru) 1993-08-23
IE903215A1 (en) 1991-03-13
AU6128290A (en) 1991-03-14
CN1049990A (zh) 1991-03-20
US5092391A (en) 1992-03-03
ES2045873T3 (es) 1994-01-16
ZA907060B (en) 1992-04-29
KR910005949A (ko) 1991-04-27
PL286771A1 (en) 1991-03-11
FI904339A0 (fi) 1990-09-03
EP0418182A1 (de) 1991-03-20
FR2651455B1 (fr) 1992-05-22
CN1022295C (zh) 1993-10-06
ATE95734T1 (de) 1993-10-15
PT95221A (pt) 1992-05-29
NO903849L (no) 1991-03-07
DE69003917D1 (de) 1993-11-18
NO903849D0 (no) 1990-09-04
JPH0399758A (ja) 1991-04-24
AU633347B2 (en) 1993-01-28

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