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EP0137118B1 - Ecran pour un jet de coulée de matériau liquide - Google Patents

Ecran pour un jet de coulée de matériau liquide Download PDF

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Publication number
EP0137118B1
EP0137118B1 EP84107391A EP84107391A EP0137118B1 EP 0137118 B1 EP0137118 B1 EP 0137118B1 EP 84107391 A EP84107391 A EP 84107391A EP 84107391 A EP84107391 A EP 84107391A EP 0137118 B1 EP0137118 B1 EP 0137118B1
Authority
EP
European Patent Office
Prior art keywords
bellows
screening
gas
skirt
screening device
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
Application number
EP84107391A
Other languages
German (de)
English (en)
Other versions
EP0137118A1 (fr
Inventor
Ernst Meier
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.)
Fhi Finanz- Handels- und Investment AG
Original Assignee
Fhi Finanz- Handels- und Investment 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 Fhi Finanz- Handels- und Investment AG filed Critical Fhi Finanz- Handels- und Investment AG
Priority to AT84107391T priority Critical patent/ATE26662T1/de
Publication of EP0137118A1 publication Critical patent/EP0137118A1/fr
Application granted granted Critical
Publication of EP0137118B1 publication Critical patent/EP0137118B1/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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/106—Shielding the molten jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • B22D37/005—Shielding the molten metal stream

Definitions

  • the invention relates to a shielding device for a pouring stream of liquid material according to the preamble of claim 1.
  • a shielding device of this type is known from DE-PS 28 34 746.
  • the bellows is provided at both ends with ring flanges and can be connected in a sealing manner to the bottom of a casting vessel and the top of a mold.
  • the lower ring flange can be raised quickly with the aid of a lifting device up to the upper ring flange while folding the bellows.
  • a protective gas is introduced into the space surrounding the pouring stream via a gas distribution ring, which is connected to a supply line leading to the outside.
  • a gas distribution ring which is connected to a supply line leading to the outside.
  • maintaining a protective gas atmosphere in the space surrounding the jet is countered by the fact that the bellows leaks relatively quickly. If this leak occurs during a pouring process, an increased protective gas supply must be used to prevent air from entering the jet in order to avoid reoxidation. Otherwise the pouring process must be interrupted, which is undesirable.
  • the costs for the corresponding frequent replacement of the bellows have an unfavorable effect on the operating costs.
  • the object of the invention is to provide a shielding device which ensures an extension of the service life of the operating personnel with improved thermal protection.
  • the present invention is based on the knowledge that for the service life of an airtight bellows not only the mechanical stress during folding and the radiation heat are significant, but also that splashes occur in normal casting operation and can lead to damage.
  • the bellows are freed from the functions of splash and radiation protection and these tasks are overlaid on the shielding shirt, the thermal load on the bellows is considerably reduced and the gas impermeability is permanently maintained.
  • the thermal load on the bellows is further reduced by the gas cushion in the gas distribution chamber. It is important here that the gas is in motion, dissipates heat absorbed in the gas distribution chamber into the space surrounding the pouring jet and is replaced by fresh, cooler gas.
  • the average of gas distributed over the shielding shirt also ensures a distributed preparation of the same on the hot side of this shielding shirt. This can prevent individual surface areas on the hot side from reaching temperatures that would lead to accelerated aging. Even if the gas experiences considerable heating as it flows through the gas distribution chamber, it is still able to exert a cooling effect which reduces the permanent thermal load when it passes through or exits the shielding shirt.
  • a textile structure made of silicon dioxide filaments is expediently used for the shielding shirt and is not damaged even by splashes of a steel pouring jet.
  • the gas cushion in the gas distribution chamber has the effect that the shielding shirt and the bellows are kept radially distant from one another, insofar as they can move independently of one another.
  • the shielding shirt which can also be pushed together due to its flexibility, does not prevent the bellows from being pushed together.
  • one or more stiffening rings for the shielding shirt where the axial extension thereof is greater than 1 in relation to the diameter. This prevents wrinkles from forming when pushed together, which could get into dangerous proximity of the pouring stream.
  • Both the shielding shirt and the bellows preferably expand from top to bottom and have the shape of truncated cones or pyramids. Thanks to the invention, z. B. in the case of truncated cones, a relatively small upper diameter can be assumed without the risk that the shielding shirt could be damaged or destroyed as a result of the proximity to the pouring jet.
  • the ends of the bellows and shielding shirt can be detachably attached individually to a common upper and lower ring flange made of metal and connected to one another via these.
  • the entry means in the form of a connection and a channel connected to it and opening into the chamber can also be provided in one of the two ring flanges. This configuration allows the bellows and shirt to be replaced individually.
  • the entry means can be formed by a connecting piece inserted in the bellows.
  • the fresh gas is then introduced into the outer chamber, from which it then enters the inner chamber, distributed through the intermediate shell.
  • a gas cushion forms in the outer chamber, which as a whole has a temperature which is significantly lower than that of the cushion adjacent to the shirt.
  • the drawing shows a vertical section of part of a continuous caster, e.g. for steel, consisting of a mold 1 and a distribution vessel 2.
  • the distribution vessel 2 discharges a pouring jet 4 into the mold 1 through a bottom spout 3.
  • a shielding device In order to prevent air from entering the pouring stream 4 and the melt in the mold 1 and thereby reducing the load to reduce the operating personnel, in particular by the direct heat radiation of the pouring jet, a shielding device, generally designated 10, extends between the jacket 6 of the distributor vessel 2 and the upper side 5 of the mold 1.
  • the shielding device 10 comprises a bellows 11 which is circular in cross section and coaxially surrounds the pouring jet 4.
  • the bellows 11, which consists of a gas-tight material, is given its cross-sectional shape by being clamped by means of clamping rings 8 between two ring flanges 12 and 13.
  • the ring flange 12 is on the top 5 of the mold 1 by fastening means, not shown, for. B. Stand studs and clamping wedges. Anderseis the ring flange 13 is attached to the boom 14 of a lifting mechanism in the form of a cylinder-piston unit 15.
  • the cylinder 16 of the unit 15 is on the mold 1 e.g. rigidly attached, while the piston rod 18 connected to the piston 17 carries the boom 14.
  • the unit presses the ring flange 13 against the jacket 6 of the distribution vessel 2 via the arm 14.
  • Sealing rings 19 and 20 are provided between the ring flanges 12 and 13 and the upper side 5 or the jacket 6 in order to achieve a gas-tight connection of the bellows to the mold or the distribution vessel.
  • a centering ring 7 is provided on the jacket 6 within the ring flange 13.
  • an annular gas distribution chamber 21 is provided within the bellows 11, which surrounds the space 22 penetrated by the pouring jet 4 and is delimited by a shielding shirt 23.
  • an inlet connection 24 inserted into the bellows 11, which is connected in a manner not shown to a source of protective gas.
  • the shirt 23 is formed from a material that is gas-permeable and fire-proof. This can be a textile structure, e.g. act a fabric made of silicon dioxide filaments.
  • the material of which is a plasticized tissue, e.g. B. can be a silicone-coated glass fiber fabric
  • the shielding shirt 23 is flexible. Its ends are also fastened to the ring flanges 12 and 13 by means of clamping rings 8, but with smaller diameters than the corresponding ends of the bellows 11.
  • Bellows 11 and shielding shirt 23 have the shape of truncated cones with the same cone angles, which are arranged upright, but have different base diameters.
  • a stiffening ring 25 is arranged horizontally somewhat above half the height and over the entire circumference, for. B. connected to the shirt by loops attached to this. If the upper ring flange 13 is lowered by actuating the unit 15, the bellows 11 and the shirt 23 folding, the stiffening ring 25 limits the width of the folds and prevents fold parts from getting into the vicinity of the axis of the pouring jet 4. In the lowered position of the ring 13, the truncated cone shape of the bellows and shirt enables the folds to be distributed over a larger diameter range and thus a reduced material stress when pushed together.
  • the shielding shirt 23 effectively shields the bellows 11 against represents above the pouring stream and retains both splashes and heat radiation, the shirt 23, despite its porosity, also acts as insulation with respect to the heat present in the room 22. This is because the shielding shirt is flowed through from the outside inwards by protective gas from the insulating gas cushion. The direction of flow of the protective gas is opposite to the temperature gradient, the temperature in the gas cushion being considerably lower than that on the outside of the shirt 23 as a result of the constant renewal. Thus, when flowing through and distributing gas on the inside of shirt 23, heat is at least more likely to be removed.
  • the cross-section of the shielding device and in particular with respect to the cross-sectional shape is adapted to the format to be poured or the size and shape of any gas opening into which the pouring jet enters.
  • the shielding device it is expedient to design the shielding device as a truncated pyramid with a corresponding aspect ratio.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Diaphragms And Bellows (AREA)
  • Continuous Casting (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Joints Allowing Movement (AREA)
  • Formation And Processing Of Food Products (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Seasonings (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Claims (10)

1. Dispositif de protection pour un jet de coulée en métal liquide, destiné en particulier à être monté entre une poche de coulée (2) pour matières métalliques fondues et une coquille (1) et comprenant un soufflet compressible (11) étanche aux gaz ainsi que des moyens d'entrée (24) pour un gaz protecteur, lequel est destiné à être insufflé dans l'espace (22) entourant le jet de coulée (4), caractérisé par au moins une chambre annulaire (21) distributrice de gaz qui, prévue à l'intérieur du soufflet (11), est en communication avec les moyens d'entrée (24) et est limitée vers l'intérieur par une chemise protectrice flexible (23) en matière réfractaire et perméable aux gaz, la chemise protectrice (23) et le soufflet (11) étant, au niveau de leurs extrémités correspondantes, reliés entre eux de manière étanche aux gaz.
2. Dispositif de protection selon la revendication 1, caractérisé en ce que la chambre (21) distributrice de gaz est limitée vers l'extérieur par le soufflet (11).
3. Dispositif de protection selon la revendication 1 ou 2, caractérisé en ce que les moyens d'entrée sont prévus sur le soufflet (11) sous la forme d'une tubulure (24).
4. Dispositif de protection selon la revendication 2, caractérisé en ce que le soufflet (11) et la chemise protectrice (23) limitent une section qui va en augmentant de haut en bas.
5. Dispositif de protection selon la revendication 4, caractérisé en ce que le soufflet (11) et la chemise protectrice (23) affectent la forme de cônes tronqués présentant de préférence un même angle de cône.
6. Dispositif de protection selon la revendication 5, caractérisé en ce que les diamètres aux extrémités du soufflet (11) et de la chemise protectrice (23) sont approximativement égaux.
7. Dispositif de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que le soufflet (11) et la chemise protectrice (23) forment un seul ensemble à des fins de montage et de transport.
8. Dispositif de protection selon la renvendica- tion 7, caractérisé en ce que le soufflet (11) et la chemise protectrice (23) sont, au niveau de chacune de leurs extrémités, reliés ensemble à une bague.
9. Dispositif de protection selon la revendication 8, caractérisé en ce que les bagues sont réalisées en tant que brides annulaires.
10. Dispositif de protection selon la revendication 2, caractérisé en ce que la chemise protectrice (23) est reliée du côté extérieur à une bague ren- forçatrice (25).
EP84107391A 1983-08-12 1984-06-27 Ecran pour un jet de coulée de matériau liquide Expired EP0137118B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84107391T ATE26662T1 (de) 1983-08-12 1984-06-27 Abschirmvorrichtung fuer einen giessstrahl aus fluessigem material.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4415/83A CH660700A5 (de) 1983-08-12 1983-08-12 Abschirmvorrichtung fuer einen giessstrahl aus fluessigem material.
CH4415/83 1983-08-12

Publications (2)

Publication Number Publication Date
EP0137118A1 EP0137118A1 (fr) 1985-04-17
EP0137118B1 true EP0137118B1 (fr) 1987-04-22

Family

ID=4275716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107391A Expired EP0137118B1 (fr) 1983-08-12 1984-06-27 Ecran pour un jet de coulée de matériau liquide

Country Status (9)

Country Link
US (1) US4565239A (fr)
EP (1) EP0137118B1 (fr)
JP (1) JPS60216958A (fr)
AT (1) ATE26662T1 (fr)
CA (1) CA1219726A (fr)
CH (1) CH660700A5 (fr)
DE (2) DE3463222D1 (fr)
ES (1) ES280558Y (fr)
ZA (1) ZA846102B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410651A2 (fr) * 1989-07-26 1991-01-30 LTV Steel Company, Inc. Appareil et procédé pour la protection d'acier liquide pendant le remplissage de moules de lingotières
EP0505035A1 (fr) * 1991-03-22 1992-09-23 Allegheny Ludlum Corporation Procédé et dispositif pour protéger un jet de métal liquide
FR2783732A1 (fr) * 1998-09-28 2000-03-31 Ascometal Sa Dispositif d'inertage pour lingotiere de coulee continue des metaux

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2586210B1 (fr) * 1985-08-14 1988-05-13 Air Liquide Dispositif de protection contre l'oxydation et/ou la nitruration d'un jet de metal liquide et son utilisation
US4717052A (en) * 1986-07-11 1988-01-05 Aluminum Company Of America Molten metal conduit
DE4027662C2 (de) * 1990-08-31 1994-02-10 Rexroth Mannesmann Gmbh Vergießofen
GB9615765D0 (en) * 1996-07-26 1996-09-04 Foseco Int Shrouding means
KR100832427B1 (ko) * 2001-12-21 2008-05-26 주식회사 포스코 침지노즐 보온장치
KR100868504B1 (ko) * 2002-05-29 2008-11-12 주식회사 포스코 연속주조설비의 주형내 용강 비산 방지장치
KR100773834B1 (ko) 2006-12-18 2007-11-06 주식회사 포스코 연속주조장치의 용강 비산 방지 장치
RU187633U1 (ru) * 2018-06-26 2019-03-14 Публичное акционерное общество "Северсталь" Устройство для защиты струи металла при непрерывной разливке сортовой заготовки сечением до 150 мм
DE102019004255A1 (de) * 2019-06-14 2020-12-17 Linde Gmbh Verfahren zum Schwerkraftgießen, Faltenbalg und Verwendung eines Faltenbalgs

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889596A (en) * 1957-02-26 1959-06-09 British Iron Steel Research Casting of metals
DE7008854U (de) * 1970-03-11 1970-11-26 Krupp Ag Huettenwerke Vorrichtung zum vergiessen unter schutzgas.
GR61761B (en) * 1975-11-12 1979-01-09 Linde Ag Casting plant
US4200138A (en) * 1976-03-17 1980-04-29 Linde Aktiengesellschaft Process for the shielding of a casting stream in a casting apparatus
US4084799A (en) * 1976-08-30 1978-04-18 Georgetown Steel Corporation Shrouding apparatus
DE7628144U1 (de) * 1976-09-06 1978-06-01 Mannesmann Ag, 4000 Duesseldorf Einrichtung zum verbinden einer bodenausgusspfanne mit einem zwischengefaess
DE2834746C2 (de) * 1978-08-08 1982-07-29 Hamburger Stahlwerke Gmbh, 2103 Hamburg Abschirmvorrichtung für einen Gießstrahl aus flüssigem Metall
DE2929500C2 (de) * 1979-07-20 1983-03-17 Hamburger Stahlwerke Gmbh, 2103 Hamburg Abschirmvorrichtung für einen Gießstrahl aus flüssigem Metall
GB2111879B (en) * 1981-12-04 1985-06-19 Air Prod & Chem Apparatus for shielding molten metal during teeming

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0410651A2 (fr) * 1989-07-26 1991-01-30 LTV Steel Company, Inc. Appareil et procédé pour la protection d'acier liquide pendant le remplissage de moules de lingotières
EP0410651A3 (en) * 1989-07-26 1992-04-22 Ltv Steel Company, Inc. Apparatus and method for shrouding of liquid steel during filling of ingot molds
EP0505035A1 (fr) * 1991-03-22 1992-09-23 Allegheny Ludlum Corporation Procédé et dispositif pour protéger un jet de métal liquide
FR2783732A1 (fr) * 1998-09-28 2000-03-31 Ascometal Sa Dispositif d'inertage pour lingotiere de coulee continue des metaux
EP0990474A1 (fr) * 1998-09-28 2000-04-05 ASCOMETAL (Société anonyme) Dispositif d'inertage pour lingotière de coulée continue des métaux

Also Published As

Publication number Publication date
US4565239A (en) 1986-01-21
CH660700A5 (de) 1987-06-15
DE8420823U1 (de) 1984-10-11
ES280558U (es) 1985-06-16
ZA846102B (en) 1985-03-27
EP0137118A1 (fr) 1985-04-17
ES280558Y (es) 1986-04-01
ATE26662T1 (de) 1987-05-15
DE3463222D1 (en) 1987-05-27
CA1219726A (fr) 1987-03-31
JPH0112583B2 (fr) 1989-03-01
JPS60216958A (ja) 1985-10-30

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