EP0703027A1 - Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter - Google Patents

Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter Download PDF

Info

Publication number
EP0703027A1
EP0703027A1 EP95402010A EP95402010A EP0703027A1 EP 0703027 A1 EP0703027 A1 EP 0703027A1 EP 95402010 A EP95402010 A EP 95402010A EP 95402010 A EP95402010 A EP 95402010A EP 0703027 A1 EP0703027 A1 EP 0703027A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
nozzle
casting
pouring
hole
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.)
Granted
Application number
EP95402010A
Other languages
English (en)
French (fr)
Other versions
EP0703027B1 (de
Inventor
Jean-Charles Daussan
Gérard Daussan
André Daussan
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.)
Daussan SAS
Original Assignee
Daussan SAS
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 Daussan SAS filed Critical Daussan SAS
Priority to DE29521463U priority Critical patent/DE29521463U1/de
Publication of EP0703027A1 publication Critical patent/EP0703027A1/de
Application granted granted Critical
Publication of EP0703027B1 publication Critical patent/EP0703027B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

Definitions

  • the present invention relates to a liquid metal pouring container comprising side walls and a bottom covered by a refractory permanent coating, the bottom comprising at least one pouring orifice in the permanent coating of said bottom, this orifice being constituted by a substantially frustoconical hole. in which is axially engaged a pouring nozzle, an annular space being provided between the hole of the permanent coating and the periphery of the nozzle.
  • Such a container can be a pouring container of liquid metal such as a ladle or a transfer container such as a tundish.
  • the permanent coating and especially the pouring nozzle are made of a very hard refractory material.
  • the pouring nozzle is bonded by a layer of refractory cement to the surface of the frustoconical hole of a seat brick inserted in the permanent covering, or to the surface of a frustoconical hole formed directly in the permanent covering.
  • a cylinder is used which pushes the nozzle towards the interior of the container.
  • a metallurgical container in which the annular space between the coating hole and the periphery of the nozzle has a small thickness (a few millimeters at most) and is filled with a highly refractory fibrous material which hardly reacts with the materials constituting the surfaces of the joint.
  • This fibrous material is preferably molten kaolin in fibrous form.
  • the object of the present invention is to remedy these drawbacks.
  • the invention thus relates to a liquid metal pouring container comprising side walls and a bottom covered by a refractory permanent coating, the bottom comprising at least one pouring orifice in the permanent coating of said bottom, this orifice being constituted by a hole substantially frustoconical in which is axially engaged a pouring nozzle, an annular space being formed between the hole of the permanent coating and the periphery of the nozzle.
  • this container is characterized in that this annular space is filled with a prefabricated sleeve made up of inorganic particles maintained by a binder having a predetermined degradation rate at the temperatures involved during the casting of said liquid metal.
  • This prefabricated sleeve is easy to install. It is furthermore easy to give it predetermined dimensions, so that it can be adjusted in a precise, safe and reliable manner on the surface of the hole of the container as on the external peripheral surface of the nozzle.
  • the sleeve Since the binder has a predetermined degradation rate at the temperatures involved during the casting of the liquid metal, the sleeve loses a predetermined part of its cohesion during said casting, and easily separates from the permanent refractory lining without damaging the peripheral surface of the hole. frustoconical of it after this pouring.
  • the particle size and the composition of the inorganic particles constituting the sleeve are chosen so that these particles, at the temperature of the liquid metal contained in the container, do not sinter completely or sinter only weakly so as to create a friable bond with the surfaces with which they are in contact.
  • the particles of the sleeve therefore do not risk strongly adhering to the surface of the hole of the permanent coating, and can be easily detached from this surface without damage to it.
  • the sleeve provides an absolute seal with respect to the liquid metal.
  • the inorganic particles constituting the sleeve are mainly particles of magnesia and / or silica.
  • the sleeve is thus simple and inexpensive to manufacture.
  • the thickness of the prefabricated sleeve is between 15 and 35 mm, and the sleeve is thermally insulating.
  • the sleeve therefore provides a separation and separation function between the pouring nozzle and the permanent refractory lining. It also provides a thermal insulation function between the nozzle and said coating.
  • the sleeve thus prevents cooling of the nozzle by the permanent coating during casting, which limits the risk of metal freezing on the inner peripheral wall of the nozzle.
  • the invention also provides a prefabricated sleeve for fixing the nozzle, intended to be used in a liquid metal pouring container according to the first aspect of the invention, this sleeve being characterized in that it is made from particles inorganic bonded together by a binder which has a predetermined degradation rate at the temperatures involved during the casting of said liquid metal.
  • FIG. 1 partially represents a casting container, for example a continuous casting distributor, comprising a side wall 1 and a bottom 2 covered by a permanent coating 3, for example made of refractory concrete.
  • the bottom 2 comprises a pouring orifice 4 passing through the permanent coating 3 of the bottom 2.
  • This permanent coating 3 has a hole 6 substantially frustoconical, represented for example flared upwards, in which is engaged axially a pouring nozzle 7.
  • the bottom 2 comprises a pouring orifice 4 passing through a seat brick 5 inserted into the permanent covering 3 of the bottom 2, the hole 6 passing through the seat brick 5 and receiving the nozzle 7.
  • An annular space is provided between the hole 6 of the permanent covering 3, or of the seat brick 5, and the periphery 8 of the nozzle 7.
  • the nozzle 7 has an outer surface 8 preferably of frustoconical shape substantially identical to the frustoconical inner shape of the hole 6.
  • a casting stopper 9 is placed inside the pouring vessel which closes the passage opening 4 of the nozzle 7.
  • the inner surface of the permanent coating 3 can be covered by a protective layer 10 of consumable material, for example (inorganic particles, fibers and binder) sinterable.
  • a protective layer 10 of consumable material for example (inorganic particles, fibers and binder) sinterable.
  • the annular space formed between the hole 6 of the permanent covering 3 or of the seat brick 5 and the periphery 8 of the nozzle 7, is filled by a prefabricated sleeve 11 made up of inorganic particles maintained by a binder or a bond having a predetermined degradation rate at temperatures involved during the pouring of the liquid metal.
  • the sleeve 11 retains a certain sufficient cohesion to ensure a perfect seal against the liquid metal during casting, but has a certain friability which makes it possible to easily release the fragments of the sleeve from the inner peripheral surface of the hole 6.
  • the particle size and the composition of the inorganic particles are chosen so that these particles, at the temperature of the liquid metal contained in the container, do not sinter completely or sinter only weakly so as to create with the surfaces with which they are in contact with a friable bond.
  • the sleeve adheres only weakly to the surfaces with which it is in contact, and remains brittle.
  • the inorganic particles constituting the sleeve can be mainly particles of magnesia and / or silica.
  • a conventional mineral and / or organic binder can be used which decomposes at temperatures involved during casting, partial or weak sintering of the particles maintaining the necessary cohesion of the sleeve 11.
  • binder or bond could be used having, after casting, a predetermined degradation rate allowing easy elimination of the sleeve 11 and of the nozzle 7 freeing the hole without damaging the inner peripheral surface of said hole 6.
  • composition and the particle size of the inorganic particles can be chosen so that the sleeve has an open porosity greater than 45% and therefore exhibits thermal insulating properties.
  • the weight composition of the mixture constituting the sleeve 11 can be as follows: mineral binder, for example sodium silicate: 0 to 20% refractory material in grains, for example crushed clay, chamotte, olivine, magnesia and their mixtures: 0 to 98% mineral fibers: 0 to 1% organic fibers: 0 to 2% organic binder, for example dextrin: 0 to 10% rheology agent, for example bentonite: 0 to 5%
  • a preferred composition by weight of the mixture constituting the sleeve 11 is for example the following: Cr2O3 0.12 to 0.50% for example 0.25% If 18 to 22% 19.22% Al2O3 0.10 to 0.40% 0.28% CaO 1 to 3% 2.00% MgO 60 to 75% 68.32% Fe2O3 1.20 to 4% 2.82% Na2O 0 to 0.10% 0.01% H2O 0.50 to 2.50% 1.79% VS 1.7 to 3% 2.43% loss on ignition at 1000 ° C 3 to 5.5% 4.81%
  • the thickness of the annular space filled by the sleeve 11 can be between 15 and 35 mm approximately.
  • the sleeve 11 remains brittle, which means that the sleeve 11 has not completely sintered or has only slightly sintered, due to the high temperature of the liquid metal contained in the casting container.
  • the mechanical connection between the nozzle 7 and the surface of the hole 6 remains relatively weak.
  • the nozzle 7 can be easily extracted from the hole 6, by simply inverting the pouring container.
  • connection created by the weak sintering or by the partial sintering between the sleeve 11 and the surfaces in contact is however strong enough to prevent any risk of displacement of the nozzle under the effect of the turbulence generated during casting in the liquid metal.
  • the partial sintering of the sleeve 11 is also favorable to make this sleeve sufficiently tight and to avoid any risk of leakage of liquid metal.
  • Partial sintering is obtained by choosing for the sleeve 11 a mixture of inorganic particles such as silica, alumina, magnesia, the particle size of which is not too fine, since this promotes sintering.
  • the sleeve 11 thus ensures, by its thickness, a function of physical separation and distance between the pouring nozzle 7, on the one hand, and the permanent coating 3 or the seat brick 5, on the other hand. It thus eliminates all the consequences of dilation of the nozzle during casting, and of mechanical removal of the nozzle after casting.
  • the sleeve 11 preferably has an open porosity greater than 45% which gives it thermal insulation properties.
  • This open porosity can come in particular from the decomposition of the mineral binder and / or organic, and that of any organic fibers.
  • the sleeve 11 provides significant thermal insulation between the nozzle and the permanent coating. This avoids any heat loss from the nozzle to the permanent coating, and therefore allows rapid heating of the nozzle before casting, less cooling of the nozzle during casting.
  • the composition of the sleeve 11 must be such that the sleeve does not adhere to the surface of the hole 6 of the permanent coating, at the temperature of this surface. On the other hand, there is no disadvantage in that the sleeve adheres to the nozzle 7, the temperature of which is clearly higher than that of the permanent coating.
  • the prefabricated sleeve because of its precise dimensions with small tolerances, allows rapid and precise mounting of the nozzle in hole 6.
  • An annular seal 12 made of refractory concrete protecting the sleeve 11 can be placed around the upper part of the nozzle 7, above the sleeve 11.
  • an insulating ring 13 having for example the same composition and the same physical and thermal characteristics as the sleeve 11, is put in place above the sleeve 11, the nozzle 7 and the permanent coating 3
  • This ring 13 is preferably prefabricated like the sleeve 11.
  • the external surface of the nozzle 7 could include reliefs or recesses to achieve a certain anchoring of the sleeve 11 on the surface of the nozzle 7, so that during the extraction of the latter, the sleeve 11 is demoulded. same time of hole 6 and thus leaves the surface of this hole intact and smooth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Ceramic Products (AREA)
EP95402010A 1994-09-05 1995-09-05 Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter Expired - Lifetime EP0703027B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29521463U DE29521463U1 (de) 1994-09-05 1995-09-05 Verbindungsteil zur Verwendung in einem Behälter für eine Schmelze aus flüssigem Metall

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9410619A FR2724128A1 (fr) 1994-09-05 1994-09-05 Dispositif pour faciliter l'extraction d'une busette de l'orifice de coulee d'un recipient de coulee de metal liquide
FR9410619 1994-09-05
US08/811,929 US5858260A (en) 1994-09-05 1997-03-05 Molten metal pouring container and prefabricated sleeve for fixing a nozzle in a container of this kind

Publications (2)

Publication Number Publication Date
EP0703027A1 true EP0703027A1 (de) 1996-03-27
EP0703027B1 EP0703027B1 (de) 1998-04-01

Family

ID=26231386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402010A Expired - Lifetime EP0703027B1 (de) 1994-09-05 1995-09-05 Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter

Country Status (4)

Country Link
US (1) US5858260A (de)
EP (1) EP0703027B1 (de)
DE (1) DE69501932T2 (de)
FR (1) FR2724128A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE526728C2 (sv) * 2003-12-11 2005-11-01 Pergo Europ Ab Ett förfarande för framställning av paneler med en dekorativ yta
DE102005061291B4 (de) * 2005-12-20 2008-01-03 Heraeus Electro-Nite International N.V. Keramischer Lochstein und metallurgisches Gefäß
ES2609510T3 (es) * 2006-11-06 2017-04-20 Krosakiharima Corporation Ladrillos de manga resistentes
EP2382062B1 (de) * 2009-01-21 2019-08-14 Refractory Intellectual Property GmbH & Co. KG Taucheintrittsdüse
DE102010044916A1 (de) * 2010-09-09 2012-03-15 Thermat Industrieofen Gmbh Füllrohr flachdichtend in Einheit mit Einfülltrichter für druckgasbetätigte Dosieröfen für NE-Metalle
EP2444177A1 (de) * 2010-10-20 2012-04-25 Vesuvius Group S.A Gießrohr für flüssige Metal
CN114378290B (zh) * 2021-12-13 2024-03-19 首钢京唐钢铁联合有限责任公司 一种中间包上水口安装方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119057A1 (de) 1970-12-23 1972-08-04 Interstop Ag
US3735906A (en) * 1971-03-15 1973-05-29 Juten M A Washington Replaceable molten metal nozzle structure
FR2396610A1 (fr) * 1977-07-06 1979-02-02 Daishin Kako Co Ltd Agent de liberation d'une goulotte refractaire d'une poche de coulees
JPS574375A (en) * 1980-06-09 1982-01-09 Nisshin Steel Co Ltd Vessel for molten metal
JPS63157756A (ja) * 1986-12-22 1988-06-30 Tokyo Yogyo Co Ltd ノズルれんがのノズル受けれんがへのセツト方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395840A (en) * 1966-07-15 1968-08-06 Vesuvius Crucible Co Nozzle for a bottom pour ladle for molten metal
FR2516415A1 (fr) * 1981-11-13 1983-05-20 Daussan & Co Dispositif pour eliminer les inclusions contenues dans les metaux liquides

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2119057A1 (de) 1970-12-23 1972-08-04 Interstop Ag
US3735906A (en) * 1971-03-15 1973-05-29 Juten M A Washington Replaceable molten metal nozzle structure
FR2396610A1 (fr) * 1977-07-06 1979-02-02 Daishin Kako Co Ltd Agent de liberation d'une goulotte refractaire d'une poche de coulees
JPS574375A (en) * 1980-06-09 1982-01-09 Nisshin Steel Co Ltd Vessel for molten metal
JPS63157756A (ja) * 1986-12-22 1988-06-30 Tokyo Yogyo Co Ltd ノズルれんがのノズル受けれんがへのセツト方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 419 (M - 760)<3266> 8 November 1988 (1988-11-08) *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 61 (M - 123)<939> 20 April 1982 (1982-04-20) *

Also Published As

Publication number Publication date
EP0703027B1 (de) 1998-04-01
DE69501932T2 (de) 1998-11-26
FR2724128B1 (de) 1997-02-07
US5858260A (en) 1999-01-12
FR2724128A1 (fr) 1996-03-08
DE69501932D1 (de) 1998-05-07

Similar Documents

Publication Publication Date Title
EP0214882B2 (de) Feuerfeste Auskleidung eines metallurgischen Gefässes und Verfahren zu ihrer Herstellung
EP0721388A1 (de) Gussteil mit einer äusseren schicht geeignet zur bildung einer gasdichten schicht sowie herstellungsverfahren dafür
FR2471956A1 (fr) Pieces refractaires composites et procede pour leur production par moulage
EP0703027A1 (de) Gefäss zum Giessen einer Metallschmelze und vorgefertigter Muffenkörper zur Befestigung eines Giessrohres in solchen Behälter
FR2554024A1 (fr) Busette de coulee a immersion
JPH01107952A (ja) 溶融金属用容器の回転流出ノズル
JP3426177B2 (ja) 鋳造用ストッパー
EP0102292B1 (de) Rohre für das Giessen von schmelzflüssigem Metall
CA1329977C (fr) Installation de coulee de metal liquid et procede pour sa mise en oeuvre
JP5330898B2 (ja) アルミニウムの連続鋳造用スパウト
EP0451052B1 (de) Verbesserte Konstruktion für Brenner und Blasformöffnungen in Öfen und vertikalen Reaktoren
EP0198123A1 (de) Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens
WO1995034395A1 (fr) Piece de coulee comportant une couche externe apte a former une couche impermeable aux gaz et procede de mise en ×uvre
US6245287B1 (en) Molten metal vessel and molten metal holding furnace
JPH10305357A (ja) 連続鋳造用内挿式浸漬ノズル
EP1348505A1 (de) Wärmeschockbeständiges Ausgiessformteil und Verfahren zu seiner Herstellung
JP4087474B2 (ja) ポーラスプラグおよびその製造方法
FR2606785A1 (fr) Joint pateux pour realiser l&#39;etancheite entre des surfaces soumises a la chaleur et devant etre jointoyees, procede de preparation et d&#39;application de ce joint
JP2001219252A (ja) ガス吹き込み可能な連続鋳造用ノズル
EP1144145B1 (de) Tauchgiessrohr mit erosionsbeständiger hülse und dazugehöriges herstellungsverfahren
EP0232648A1 (de) Einblaslanze für ein metallurgisches Gefäss und Verfahren zu ihrer Herstellung
EP0541416A1 (de) Verfahren zum Beschichten von Verteilern zum Stranggiessen mit Feuerfestmaterial und so erhaltenes Produkt
EP0716894A1 (de) Verfahren zum Auftragen von einer aus mindestens zwei Schichten hergestellten Schutzbeschichtung auf die Innenseiten eines metallurgischen Gefässes
FR2472959A1 (fr) Dispositif pour empecher la solidification du metal dans les orifices de coulee d&#39;un recipient metallurgique
EP0215997A1 (de) Ungebranntes feuerfestes Erzeugnis hoher Festigkeit

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

17P Request for examination filed

Effective date: 19950909

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR IT LU NL

17Q First examination report despatched

Effective date: 19961220

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR IT LU NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980401

REF Corresponds to:

Ref document number: 69501932

Country of ref document: DE

Date of ref document: 19980507

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20040913

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040923

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040929

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060930

Year of fee payment: 12

BERE Be: lapsed

Owner name: *DAUSSAN ET CIE

Effective date: 20050930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080919

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401