EP0885673B1 - Continuous casting device for billets - Google Patents

Continuous casting device for billets Download PDF

Info

Publication number
EP0885673B1
EP0885673B1 EP98201376A EP98201376A EP0885673B1 EP 0885673 B1 EP0885673 B1 EP 0885673B1 EP 98201376 A EP98201376 A EP 98201376A EP 98201376 A EP98201376 A EP 98201376A EP 0885673 B1 EP0885673 B1 EP 0885673B1
Authority
EP
European Patent Office
Prior art keywords
duct
box
shaped portion
gasket
continuous casting
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
EP98201376A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0885673A1 (en
Inventor
Yvan Juchem
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.)
Langonnaise Sah
Original Assignee
Langonnaise Sah
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 Langonnaise Sah filed Critical Langonnaise Sah
Publication of EP0885673A1 publication Critical patent/EP0885673A1/en
Application granted granted Critical
Publication of EP0885673B1 publication Critical patent/EP0885673B1/en
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
    • B22D11/08—Accessories for starting the casting procedure
    • B22D11/081—Starter bars
    • B22D11/083—Starter bar head; Means for connecting or detaching starter bars and ingots

Definitions

  • the present invention discloses a head casting device for a billet continuous casting process.
  • the head is made of steel at least partially solidified so as to engage the steel which is continuously poured into the ingot mold.
  • the ingot mold is usually made of a copper duct, which has highly cooled walls, wherein the liquid metal is poured directly from the ladle.
  • the liquid metal has to find an element that closes said duct and that will become an integral portion as well as the pulling head of said liquid metal while the liquid steel, through solidification, realises a continuous billet.
  • a fake billet is fixed to a pulling group, e.g. formed by chains, and the front portion or head of the liquid steel coming from the ladle engages with said fake billet.
  • This operation is particularly critical since, in case of a faulty engagement, when the pulling group is started, there might be the separation between the fake billet and the leading portion of the liquid steel. In such a case the steel, which is in its solidification phase, will stop flowing within the duct with the consequent stop of the plant.
  • DE-A-19 503 911 relates to a billet continuous apparatus according to the preamble of claim 1.
  • a purpose of the present invention is then to solve the above mentioned technical problems relative both to the safety of the starting part of a continuous casting process and to the easiness of conducting this initial working phase.
  • At least one side wall of said box-shaped portion has a further opening facing said inner surfaces of said duct.
  • Said gasket is advantageously made of a flexible material, like felt.
  • the outside dimensions of said box-shaped portion are smaller than the inner dimensions of said duct.
  • said flexible material of said gasket can be bent inside an annular space comprised between the inner surfaces of said duct and the outer surfaces of said box-shaped portion.
  • a head casting device for a billet continuous casting process is shown, said device can be placed in a continuously cooled casting duct, indicated by numeral 11.
  • Said duct 11 is, for example, a copper duct having hollow walls wherein a cooling liquid is circulated, e.g. water or the like.
  • the device 10 comprises basically a box-shaped portion, having a square section in the example case and side walls 12, a first base formed by a closed front wall 13 and the other base formed by an opening 14.
  • the side walls 12 of the box-shaped element define an element which is used as a cooling element.
  • An engagement portion 15 extends from the front closed wall 13, said portion can be attached to a pulling group or to a fake billet (not shown), which are utilized to pull forward the device.
  • this engagement portion 15 is realised by means of a round bar with a side notch 16 suitable to engage the pulling group.
  • a gasket 17 is placed, said gasket has a central hole 18 which can be inserted on the engagement portion 15.
  • This gasket has dimensions much greater than the closed front wall 13 so as to extend beyond said wall edges.
  • the corners of the gasket 17 have cut areas 22 suitable to facilitate the bend of the gasket around the side walls 12 of the box-shaped portion.
  • This gasket 17 is preferably made of flexible material, e.g. felt.
  • At least one side wall 12 has an additional through opening 19 suitable to connect the inner side of the box-shaped portion with an annular space 20 defined outside the box-shaped portion.
  • a head casting device 10 for a continuous casting process is shown, said device is positioned within a duct 11 with larger outer dimensions.
  • the side overall dimensions of the box-shaped portion are smaller than the inner dimensions of the duct and therefore the box-shaped portion can be put inside the duct, thus defining said annular space 20 around said box-shaped portion.
  • the flexible material of the gasket 17 can be inserted in said annular space in order to realise a seal between the outer surfaces of the device and the inner surfaces of the duct.
  • the head casting device 10 is put in the duct from the side of its closed wall 13. In this way, the gasket bends over a portion of the side surfaces of the box-shaped portion, fills the annular space 20 and realises a seal. The device is pulled until the engagement portion 15 is connected to the pulling group.
  • the continuous casting begins through the introduction of melted liquid steel, indicated by numeral 21, said steel flows into both the box-shaped portion of the device and into the annular space 20 defined by the device outer walls and the duct inner walls.
  • the liquid steel can not flow ahead of the front portion of the duct because of the presence of the gasket 17 which fits into the space 20 and guarantees an optimum seal.
  • the steel also flows inside the additional opening 19 and realises, in this way, a bridge between the steel inside the space 20 and the steel inside the box-shaped portion.
  • the small dimensions of the space 20 and the presence of the side walls 12 of the box-shaped element allow a quick cooling of the steel therein contained and also allow the formation of a good engagement to the device of the invention. Such stable situation is further enhanced by the steel that flows into the additional opening 19 which is connected to the more fluid steel contained in the box-shaped portion. At any rate, the bridge of material present in the opening improves the engagement of the continuous casting head to the pulling device.
  • the specific geometry of the device according to the present invention causes an optimum distribution of the resisting sections and of the cooling sections so as to obtain a high rate of cooling on all the outer surfaces of the device.
  • such a device since it has a simple construction realised with very low cost materials, can be of the disposable type and therefore be substituted at every start of the continuous casting process.
  • Such a device always new and perfectly good, further improves the guarantee of an optimum transfer of the pulling force and of a steady and perfect engagement of the head of the developing billet to the pulling device.
  • the self-matching of the gasket positioned on the front portion of the device is also a positive factor for the reliable start of the continuous casting process.
  • Such self-matching feature avoids the need of an initial accurate positioning of the gasket with further significant reduction of the plant setting time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Forging (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
EP98201376A 1997-05-05 1998-04-28 Continuous casting device for billets Expired - Lifetime EP0885673B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI971035 1997-05-05
IT97MI001035A IT1291722B1 (it) 1997-05-05 1997-05-05 Dispositivo di testa per un processo di colata continua di billette

Publications (2)

Publication Number Publication Date
EP0885673A1 EP0885673A1 (en) 1998-12-23
EP0885673B1 true EP0885673B1 (en) 2002-06-12

Family

ID=11377066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98201376A Expired - Lifetime EP0885673B1 (en) 1997-05-05 1998-04-28 Continuous casting device for billets

Country Status (5)

Country Link
EP (1) EP0885673B1 (enrdf_load_stackoverflow)
AT (1) ATE218938T1 (enrdf_load_stackoverflow)
DE (1) DE69805917T2 (enrdf_load_stackoverflow)
ES (1) ES2176898T3 (enrdf_load_stackoverflow)
IT (1) IT1291722B1 (enrdf_load_stackoverflow)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1310964A (fr) * 1962-01-18 1962-11-30 Concast Ag Installation de coulée continue avec un dispositif de liaison ou de séparation de la barre froide ou tige pilote et de la pièce d'entraînement
FI832828A7 (fi) * 1983-08-05 1985-02-06 Proizvodstvennoe Obiedininie Uralmash Pyöreitä harkkoja valmistavan vaakasuoran jatkuvavalukoneen muotissa käytettävä mäntä.
EP0231520B2 (de) * 1986-01-03 1993-10-13 Margrit Dr. Dislich Verfahren und Anordnung für das Anbinden eines neuen Giessstranges in einer Stranggiessanlage
DE8803181U1 (de) * 1988-03-09 1988-04-28 Büchele, Erich, 8901 Erlingen Anfahrtopf
DE3916287C1 (en) * 1989-05-19 1990-08-09 Dislich, Geb. Hoyer, Margrit, Dr., 4100 Duisburg, De Joining up dummy bar in continuous steel casting - by leaving gap between mould wall and sleeve, lining plate with paper or plastic foil etc.
JPH03291148A (ja) * 1990-04-07 1991-12-20 Sumitomo Metal Ind Ltd 鋳片引抜き用ダミーバー及び連続鋳造方法
DE19503911A1 (de) * 1994-02-18 1995-08-24 Concast Standard Ag Anfahrkopf und Verfahren zum Angießen einer Stranggießanlage

Also Published As

Publication number Publication date
DE69805917T2 (de) 2003-03-20
ITMI971035A0 (enrdf_load_stackoverflow) 1997-05-05
EP0885673A1 (en) 1998-12-23
ATE218938T1 (de) 2002-06-15
ITMI971035A1 (it) 1998-11-05
DE69805917D1 (de) 2002-07-18
IT1291722B1 (it) 1999-01-21
ES2176898T3 (es) 2002-12-01

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