EP0430841B1 - Dispositif de coulée continue de bandes minces de métal entre deux cylindres - Google Patents

Dispositif de coulée continue de bandes minces de métal entre deux cylindres Download PDF

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Publication number
EP0430841B1
EP0430841B1 EP90470062A EP90470062A EP0430841B1 EP 0430841 B1 EP0430841 B1 EP 0430841B1 EP 90470062 A EP90470062 A EP 90470062A EP 90470062 A EP90470062 A EP 90470062A EP 0430841 B1 EP0430841 B1 EP 0430841B1
Authority
EP
European Patent Office
Prior art keywords
cover
liquid metal
rolls
refractory
meniscus
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
EP90470062A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0430841A1 (fr
Inventor
Michel Larrecq
Jacques Spiquel
Hervé Tavernier
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 AT90470062T priority Critical patent/ATE94102T1/de
Publication of EP0430841A1 publication Critical patent/EP0430841A1/fr
Application granted granted Critical
Publication of EP0430841B1 publication Critical patent/EP0430841B1/fr
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
    • B22D11/0637—Accessories therefor
    • B22D11/0697—Accessories therefor for casting in a protected atmosphere
    • 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 subject of the present invention is a device for the continuous casting of thin strips of metal between two parallel rotary cylinders, this device further comprising lateral faces for retaining liquid metal at the ends of the cylinders, delimiting with the cylinders the casting space of the liquid metal.
  • the invention therefore aims to remedy these drawbacks.
  • the device for continuously casting thin strips of metal between two parallel rotary cylinders comprises a flat cover arranged above the liquid metal casting space and in the immediate vicinity of the location of its meniscus to form a heat shield sized to cover the entire surface of the liquid metal, this cover being provided with a refractory coating on its face facing the liquid metal and bearing on the two cylinders.
  • the lateral faces applied to the ends of the cylinders are pierced with liquid metal supply orifices in the casting space delimited between the two cylinders.
  • This mode of supply is indeed much more advantageous than that of supplying the pouring space from above, through a box. as in the known prior embodiments.
  • the vertical component of the liquid metal poured into the casting space by a pocket located directly above it causes turbulence and a partial mixing of the fresh liquid metal with metal being solidified within the casting space, which is not desirable for the quality of the product obtained.
  • the feed through the small faces causes only a minimum of turbulence in the bath of liquid metal, which is a factor for improving the homogeneity and therefore the quality of the thin strips obtained.
  • Figure 1 is an end elevational view of an embodiment of the continuous casting device according to the invention.
  • Figure 2 is a partial longitudinal elevation view of the device of Fig.1.
  • the device shown in the drawings is intended for the continuous casting of a liquid metal 1 such as steel, between two parallel rotary cylinders 2, which can be driven in rotation in a manner known per se by means not shown.
  • the two cylinders 2 delimit between them a casting space filled by the bath of liquid metal 1, and which is closed at the ends of the cylinders by two plates 3, called "small side faces".
  • the liquid metal bath 1 has a surface 4 called meniscus, from the edges of which and following downwards the surface of the cylinders 2, the metal liquid solidifies by forming tongues 5 of increasing thickness, which join to form a thin strip 6 of metal which is extracted by gravity from the device.
  • the device is equipped with a flat cover 7 disposed above 1 liquid metal pouring space and in the immediate vicinity of its meniscus 4.
  • This cover consists of a plate sized to cover the entire surface of the liquid metal and to take support, beyond the edges of the meniscus 4, on the surface of the cylinders 2.
  • the cover 7 On its underside facing the liquid metal 1, the cover 7 is provided with a coating 8 refractory to the liquid metal, of suitable thickness and whose the surface is in the immediate vicinity of the meniscus 4.
  • the cover 7 is pierced with an opening 9 into which opens a pipe 11 for injecting a neutral gas, through the cover 7, into the intermediate volume delimited by the meniscus 4 and by the surface of the refractory 8.
  • the pouring space is supplied through the orifices 12 of the small lateral faces 3. Furthermore, a neutral gas is injected under overpressure into the volume delimited by the meniscus 4 and the refractory 8, by the tube 11 and the opening 9. The atmosphere is therefore expelled around the periphery of the cover 7, and the neutral gas escapes along the sides of the cover 7, as indicated by the arrows F.
  • the cover 7 instead of resting directly on the surface of the cylinders 2, the cover 7 can then, if the overpressure of the neutral gas is sufficient, rest on a cushion of this gas.
  • the cover 7 is placed, by its refractory lining, in the immediate vicinity of the meniscus 4 and therefore effectively performs its function of thermal shield for the bath of liquid metal 1.
  • the injection of a neutral gas between the meniscus 4 and the refractory lining 8 protects the surface of the liquid metal against any risk of oxidation.
  • the refractory lining 8 can be constituted by a set of fibrous refractory layers, providing good thermal insulation of the ingot mold and satisfactorily avoiding untimely heating of the cover 7.
  • a coating left naked generates during its rise in temperature a gaseous release, mainly carbonaceous, which can be harmful to personnel and annoying for the proper functioning of the installation. In particular, it can disturb the functioning of metal level measuring devices optically.
  • these coatings are rapidly degraded by projections of liquid metal, which are always to be feared if the cover 7 is placed at a very short distance from the meniscus as is desirable.
  • the invention is not limited to the embodiment described and may include variant embodiments.
  • it is not essential to inject a neutral gas between the meniscus 4 and the cover 7.
  • the latter bears directly on the surface of the cylinders 2.
  • It can then be advantageous, in order to limit its wear, to produce the part of the refractory lining 8 called to be in contact with the cylinders in a dense refractory.
  • the rest of the coating 8 can be made of a softer material, such as the aforementioned fibrous refractory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Metal Rolling (AREA)
EP90470062A 1989-11-22 1990-11-14 Dispositif de coulée continue de bandes minces de métal entre deux cylindres Expired - Lifetime EP0430841B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90470062T ATE94102T1 (de) 1989-11-22 1990-11-14 Vorrichtung zum stranggiessen von duennen metallbaendern zwischen zwei walzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915340A FR2654657B1 (fr) 1989-11-22 1989-11-22 Dispositif de coulee continue de bandes minces de metal entre deux cylindres.
FR8915340 1989-11-22

Publications (2)

Publication Number Publication Date
EP0430841A1 EP0430841A1 (fr) 1991-06-05
EP0430841B1 true EP0430841B1 (fr) 1993-09-08

Family

ID=9387661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470062A Expired - Lifetime EP0430841B1 (fr) 1989-11-22 1990-11-14 Dispositif de coulée continue de bandes minces de métal entre deux cylindres

Country Status (15)

Country Link
US (1) US5159969A (ja)
EP (1) EP0430841B1 (ja)
JP (1) JP2731824B2 (ja)
AT (1) ATE94102T1 (ja)
AU (1) AU640969B2 (ja)
CA (1) CA2030464A1 (ja)
DE (1) DE69003227T2 (ja)
DK (1) DK0430841T3 (ja)
ES (1) ES2044518T3 (ja)
FI (1) FI92295C (ja)
FR (1) FR2654657B1 (ja)
IE (1) IE904212A1 (ja)
NO (1) NO905018L (ja)
PT (1) PT95951A (ja)
ZA (1) ZA909333B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693135A1 (fr) * 1992-07-03 1994-01-07 Usinor Sacilor Installation de coulée continue entre parois mobiles, et procédé de coulée utilisant l'installation.
AU667158B2 (en) * 1993-04-14 1996-03-07 Thyssen Stahl Aktiengesellschaft Device for rapidly changing and maintaining a lateral wall of a machine for the continuous casting of a metal product between rolls
WO1998035773A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
WO1998035772A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07102433B2 (ja) * 1992-03-13 1995-11-08 日立造船株式会社 移動鋳型壁を持つ連続鋳造設備における湯面保護カバー
KR100568353B1 (ko) * 2001-12-21 2006-04-05 주식회사 포스코 박판주조공정에 의한 주편제조방법

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2045124A5 (ja) * 1969-06-02 1971-02-26 Daussan Henri
US3876420A (en) * 1969-08-20 1975-04-08 Foseco Trading Ag Thermal insulation molten metal
EP0092844B1 (en) * 1982-04-28 1987-01-28 Hazelett Strip-Casting Corporation Method and apparatus for feeding and continuously casting molten metal with inert gas applied to the moving mold surfaces and to the entering metal
JPS58188544A (ja) * 1982-04-30 1983-11-04 Nippon Kokan Kk <Nkk> 金属板の連続鋳造装置
JPS58224048A (ja) * 1982-06-22 1983-12-26 Hitachi Zosen Corp ツインモ−ルドロ−ラ凝固シエル形成におけるシェルとロ−ラ面のスリップ防止法
JPS617049A (ja) * 1984-06-21 1986-01-13 Ishikawajima Harima Heavy Ind Co Ltd 鋼板の連続鋳造装置
JPS62130749A (ja) * 1985-12-04 1987-06-13 Kawasaki Steel Corp 連続鋳造装置
JPS63154245A (ja) * 1986-12-15 1988-06-27 Kawasaki Steel Corp 薄鋳片の連続鋳造方法
JP2575681B2 (ja) * 1987-01-16 1997-01-29 株式会社日立製作所 薄鋳片連続鋳造装置
JPS63220952A (ja) * 1987-03-11 1988-09-14 Nkk Corp 連続鋳造方法
FR2619032B3 (fr) * 1987-08-05 1989-06-09 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
JPH01184393A (ja) * 1988-01-18 1989-07-24 Nippon Steel Corp 耐火ライニング解体装置
JP2614742B2 (ja) * 1988-04-23 1997-05-28 日新製鋼株式会社 双ロール式連鋳機による薄板鋳造法
US4987949A (en) * 1988-07-29 1991-01-29 Hitachi Zosen Corporation Protective cover for surface of molten steel used in continuous casting apparatus

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 348 (M-642)(2795), 14 novembre 1987; && JP - A - 62130749 (KAWASAKI STEEL) 13.06.1987 *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 445 (M-767)(3292), 22 novembre 1988; && JP - A - 63177945 (HITACHI LTD.) 22.07.1988 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 142 (M-388)(1865), 18 juin 1985; & JP - A - 6021161 (MITSUBISHI) 02.02.1985 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693135A1 (fr) * 1992-07-03 1994-01-07 Usinor Sacilor Installation de coulée continue entre parois mobiles, et procédé de coulée utilisant l'installation.
AU667158B2 (en) * 1993-04-14 1996-03-07 Thyssen Stahl Aktiengesellschaft Device for rapidly changing and maintaining a lateral wall of a machine for the continuous casting of a metal product between rolls
WO1998035773A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
WO1998035772A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
US6415849B1 (en) 1997-02-14 2002-07-09 Voest-Alpine Industrieanlagenbau Gmbh How to avoid contact between oxygen and molten metal
US6443220B1 (en) 1997-02-14 2002-09-03 Voest-Alpine Industrieanlagenbau Gmbh Method of preventing contact of oxygen with a metal melt

Also Published As

Publication number Publication date
US5159969A (en) 1992-11-03
DE69003227D1 (de) 1993-10-14
DK0430841T3 (da) 1994-01-31
ES2044518T3 (es) 1994-01-01
FI905743A0 (fi) 1990-11-21
DE69003227T2 (de) 1994-04-07
JP2731824B2 (ja) 1998-03-25
AU640969B2 (en) 1993-09-09
NO905018D0 (no) 1990-11-20
EP0430841A1 (fr) 1991-06-05
FR2654657B1 (fr) 1992-03-20
CA2030464A1 (fr) 1991-05-23
FI92295C (fi) 1994-10-25
AU6678490A (en) 1991-05-30
FI905743A (fi) 1991-05-23
ZA909333B (en) 1992-06-24
PT95951A (pt) 1991-09-13
FI92295B (fi) 1994-07-15
NO905018L (no) 1991-05-23
IE904212A1 (en) 1991-05-22
JPH03169456A (ja) 1991-07-23
ATE94102T1 (de) 1993-09-15
FR2654657A1 (fr) 1991-05-24

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