EP0433419A1 - Dispositif de jonction par la fonte exempte de scories pour installations de coulee continue. - Google Patents

Dispositif de jonction par la fonte exempte de scories pour installations de coulee continue.

Info

Publication number
EP0433419A1
EP0433419A1 EP90909701A EP90909701A EP0433419A1 EP 0433419 A1 EP0433419 A1 EP 0433419A1 EP 90909701 A EP90909701 A EP 90909701A EP 90909701 A EP90909701 A EP 90909701A EP 0433419 A1 EP0433419 A1 EP 0433419A1
Authority
EP
European Patent Office
Prior art keywords
starting
tube
melt
vessel
slag
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
EP90909701A
Other languages
German (de)
English (en)
Other versions
EP0433419B2 (fr
EP0433419B1 (fr
Inventor
Bernhard Tinnes
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.)
Metacon AG
Original Assignee
Metacon 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6384608&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0433419(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Metacon AG filed Critical Metacon AG
Priority to AT90909701T priority Critical patent/ATE90600T1/de
Publication of EP0433419A1 publication Critical patent/EP0433419A1/fr
Application granted granted Critical
Publication of EP0433419B1 publication Critical patent/EP0433419B1/fr
Publication of EP0433419B2 publication Critical patent/EP0433419B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/001—Retaining slag during pouring molten metal
    • B22D43/002—Retaining slag during pouring molten metal by using floating means

Definitions

  • the invention relates to a device for slag-free casting of continuous casting plants with a slide closure at the pouring opening of a tundish and a starting tube blocking the inlet of the pouring opening when the vessel is filled with molten metal.
  • DE-OS3701707 discloses a fire-resistant starting tube for a melt vessel with an annular groove-shaped predetermined breaking point, which breaks under the influence of burn-through and / or the buoyancy of the melt.
  • the broken piece of pipe floats and thus releases the melt to the pouring opening of the vessel through the remaining tube on the bottom of the vessel.
  • the release process depends on the functional effectiveness of the predetermined breaking point at a desired point in time. If the predetermined breaking point does not break in time, then the break can be brought about by handling a rod from the outside, which is tedious and time-consuming and complex, particularly in the case of multi-strand systems.
  • the sol breaking point can function earlier than intended, so that slag floating on the melt is entrained in the pouring opening and deposited in the mold above the cold strand head.
  • Such non-metallic nests in the mold always mean a risk associated with the breakthrough of the melt when starting to pull off of the cold strand.
  • cover powder for heat insulation and air shielding of the melt immediately after a melt level has arisen in the distribution vessel. This takes place only after the melt flow has been released by means of the start pipe, so that a considerable loss of heat and reoxidation of the melt have to be accepted, which can be the cause of melt deposits or freezes forming in the slide closure.
  • the object of the present invention is to effectively improve starting devices of the type mentioned and, above all, to enable timely release of slag-free melt on the starting tube.
  • the starting tube is loosely assigned a separate starting body that floats with rising melt gel from a predetermined fill level to release the melt flow.
  • the release of the starter body and thus the release of the melt flow is dependent solely on the buoyancy potential of the starter body, which is determined in selection with the body height and the free length of the start tube.
  • the release phase runs freely, in contrast to a device, in which a detachable part is arranged on a fixed part by means of a connection to be destroyed. Seen as a whole, the casting of continuous casting plants is also more timely, more precise and safer in the case of multiple continuous casting plants.
  • the melt level which forms in the distributor vessel can be covered at an early stage with a covering powder which keeps the melt warm and prevents it
  • the procedure according to the invention is such that a hollow body-shaped starter body lies loosely on its inlet end in the extension of the starter tube.
  • a hollow cylindrical body is preferred, which is inexpensive to manufacture and can be effectively heated up together with the distribution vessel before use. It is advantageous to give the starting body a guide which runs along the inside or outside of the starting tube and forms an annular gap between the two bodies, which guides the starting body and guides it loosely when the body floats.
  • An expedient embodiment of the invention is also to be seen in the fact that instead of a starting body, optionally equipped with a guide and resting on the inlet end of the starting tube, a tubular starting body protruding on the inside or outside with an annular gap is provided, the can support tubular starting body on the bottom of the vessel or on the starting tube.
  • a starting body provided with a guide on the starting tube and in the case of a tubular starting body the starting tube and the starting body can be conically formed in the same way. For this reason, the annular gap between the starting tube and the starting body becomes larger in accordance with the rate of rise of the starting body, which accommodates a smooth melt flow over the inlet end of the starting tube.
  • the smoother flow of melt via the inlet end of the starting tube also serves the suggestion that leading passages leading in cross-section, widening in cross-section in the direction of lift of the starting body, are provided at the inlet end of the starting tube.
  • radia outflow openings covered by the tubular starting body can be arranged, the flow rate of which increases the direction of lift of the starting body. Accordingly, when the starting body rises, the outflow through the outflow openings is first released and then the outflow at the inlet end of the starting pipe.
  • the invention also proposes that the area of the starting body opposite the drain openings is designed as a seal, preferably as an inherently elastic ceramic fiber seal, which also contributes to the functionally correct operation of the device.
  • FIG. 1 The schematic diagram of a continuous caster and d Fig. 2 to 5 different embodiments of the Angiessvo direction, wherein Figs. 4 and 5 are drawn on a somewhat larger scale
  • a molten steel stream A flows from a regulated spout of a ladle (not shown) into a distribution vessel which has a sheet metal jacket 2, a refractory lining 3 and a pouring opening 5 arranged in the bottom 4 of the vessel.
  • melt 6 on which a slag blanket 7 floats, which can consist of impurities, for example in the form of oxides and a covering powder, which is applied in order to prevent reoxidations and heat radiation from the melt.
  • melt 6 on which a slag blanket 7 floats, which can consist of impurities, for example in the form of oxides and a covering powder, which is applied in order to prevent reoxidations and heat radiation from the melt.
  • the starting body 13 represents an extension of the starting tube 12 in order to cause that a certain Schme level 6a with a fill level H is reached in the distribution vessel 1 before the outflow of melt 6 via the start pipe inlet end 12a begins by floating the starting body 13 as shown in broken lines. Accordingly, an appropriate body height 13a of the starting body 13 is required for the starting body, depending on its density and the length of the starting body 12, as its extension. This steadily loses weight as the melt level 6a rises and only increases when the risk of slag running in together with the melt 6 no longer exists.
  • the melt level 6a continues to rise under the outflow of the melt 6 through the pouring opening 5 into the mold, until the desired fill level of the distribution vessel 1, which is not shown in the drawing, is reached. Thereafter, the target fill level reached is maintained in terms of control technology, i coordination with the slide closure 8 on the spout 5 of the distribution vessel 1, which controls the inflow to the mold 10.
  • the starting pipe 12 which consists of a material that can be consumed by the melt, usually dissolves, so that at the end of the casting process the distributor vessel 1 can be completely emptied.
  • the starting body 15 shown in FIG. 2 is designed like a cap. It has an outer guide 15a, which surrounds the inlet end 16a of the starting tube 16 and thus prevents undesired slipping.
  • the inflow of melt 6 into the starting tube 16 in the annular gap 17 between the guide 15a and the starting tube 16 is similar.
  • the situation is similar with the starting body 18 according to FIG. 3, which rests on a starting tube 19 which tapers conically towards the pouring opening 5 and thereby engages with an inner conical guide 18a in the inlet end 19a. This again with the release of an annular gap 20 which increases continuously when the starting body 18 floats, in which an equally continuously increasing amount of melt flows.
  • the starting pipe 21 is provided at the inlet end 21a with leading, saw-like influence passages 21c and near the vessel bottom 4 with radial drain openings 21b.
  • a tubular starting body 22 surrounds the starting tube 21 centrally by means of an annular gap 23.
  • the outflow openings 21b are closed by a seal 22a which is arranged on the starting body 22 and bridges the gap 23 and which, for example, consists of glued-on ceramic, elastically flexible fiber material.
  • the starting body 22 After reaching the fill level, the starting body 22 begins to float and gradually first releases the drain openings 21b for the melt 6 to drain into the pouring openings.
  • melt 6 is then also released gradually at the inlet end 21a of the starting tube 21 via the influence passages 21c widening in the vertical direction.
  • the drain openings 21b can be designed as elongated holes 24 or as rows of rings of smaller drain openings 25.
  • a starting tube 26 which is conically widened towards the pouring opening 5, the outlet openings 26b of which are arranged near the bottom 4 of the vessel are covered by a similarly conical starting body 27 which is turned on using its own weight.
  • the starting body 27 has on the inside a sealing surface 27a which also bridges an annular gap 28 and which gently opens the drain openings 26b when the starting body 27 floats after the melt fill level has been reached.
  • the annular gap 28 widens just as gently to allow melt to flow away via the inlet end 26a of the starting tube 26.
  • the region of the discharge openings 21b of the cylindrical starting body 21 according to FIG. 4 can be designed conically, in order to create a setting base for a likewise conical seal 22a.
  • the device according to FIG. 4 can work without drain openings 21b and seals 22a.
  • the startro 26 according to FIG. 5 can be conical in reverse, and the start body 27 with its sealing surface 27a acts inside the start tube 26
  • the new starting device can also be used on continuous casting plants which work on the tundish 1 solely with nozzle-filled spout 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

Un dispositif comprend un tuyau usuel de départ à l'entrée d'un orifice de décharge (5) d'un récipient distributeur et un corps séparé de départ, associé de manière lâche audit tuyau de départ, qui flotte sur la fonte (6) lorsque celle-ci atteint la hauteur (H) voulue de remplissage. Le fonctionnement du dispositif est ainsi amélioré avec des moyens simples et permet de manière automatique à la fonte exempte de scories de s'écouler à temps par le tuyau de départ (12).
EP90909701A 1989-07-08 1990-06-27 Dispositif de jonction par la fonte exempte de scories pour installations de coulee continue Expired - Lifetime EP0433419B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90909701T ATE90600T1 (de) 1989-07-08 1990-06-27 Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3922549 1989-07-08
DE3922549A DE3922549A1 (de) 1989-07-08 1989-07-08 Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen
PCT/EP1990/001025 WO1991000788A1 (fr) 1989-07-08 1990-06-27 Dispositif de jonction par la fonte exempte de scories pour installations de coulee continue

Publications (3)

Publication Number Publication Date
EP0433419A1 true EP0433419A1 (fr) 1991-06-26
EP0433419B1 EP0433419B1 (fr) 1993-06-16
EP0433419B2 EP0433419B2 (fr) 2002-06-05

Family

ID=6384608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909701A Expired - Lifetime EP0433419B2 (fr) 1989-07-08 1990-06-27 Dispositif de jonction par la fonte exempte de scories pour installations de coulee continue

Country Status (7)

Country Link
US (1) US5191926A (fr)
EP (1) EP0433419B2 (fr)
JP (1) JPH04501385A (fr)
CA (1) CA2035028A1 (fr)
DE (2) DE3922549A1 (fr)
ES (1) ES2043381T3 (fr)
WO (1) WO1991000788A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679162A1 (fr) * 1991-07-18 1993-01-22 Siderurgie Fse Inst Rech Dispositif de transfert par jet de metal liquide, notamment d'une poche de coulee continue vers un repartiteur.
RU2162768C2 (ru) * 1999-03-02 2001-02-10 Милькин Владимир Петрович Комбинированный бесстопорный промежуточный ковш машины непрерывного литья заготовок для вакуумирования расплава металла в потоке при разливке его по отдельным кристаллизаторам
RU2191090C2 (ru) * 2000-01-24 2002-10-20 Федеральное государственное унитарное предприятие ЦНИИчермет им. И.П.Бардина Способ непрерывной разливки металла и устройство для его осуществления
KR100953623B1 (ko) 2002-12-26 2010-04-20 주식회사 포스코 연속주조기에서 개재물 부상을 위해 턴디쉬 내부에 설치되는 용강 가이드 틀
RU2262414C2 (ru) * 2003-12-29 2005-10-20 Техком Импорт Экспорт Гмбх Промежуточный ковш для разливки стали
GB2450896A (en) * 2007-07-10 2009-01-14 Anglo American Platinum Corp Separating apparatus and method for assaying
KR101149183B1 (ko) * 2009-05-26 2012-05-25 현대제철 주식회사 불순물 혼입 방지장치
WO2014094157A1 (fr) * 2012-12-17 2014-06-26 Polar Sapphire Ltd. Procédé et appareil pour fondre de l'oxyde d'aluminium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151533C2 (de) * 1981-12-24 1983-11-24 Günter Dr.-Ing. 5750 Menden Altland Verlängerte Ausgußdüse für Zwischenbehälter
US4394006A (en) * 1982-04-07 1983-07-19 Electric Power Research Institute, Inc. Molten metal flow control
US4526349A (en) * 1983-12-13 1985-07-02 Schwer John W Method and article of manufacture for controlling slag carry-over during tapping of a heat in steelmaking
DE3701707A1 (de) * 1987-01-22 1989-12-28 Nolde Sylvia Wandelbares polstermoebel
DE3701701A1 (de) * 1987-01-22 1988-08-04 Didier Werke Ag Startrohr fuer ein schmelzengefaess
DE8907044U1 (de) * 1989-06-08 1989-08-03 Foseco International Ltd., Birmingham Rückhalte- bzw. Ausgußvorrichtung für Behälter für Metallschmelzen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9100788A1 *

Also Published As

Publication number Publication date
DE3922549C2 (fr) 1991-07-18
US5191926A (en) 1993-03-09
EP0433419B2 (fr) 2002-06-05
DE59001788D1 (de) 1993-07-22
DE3922549A1 (de) 1991-01-10
JPH04501385A (ja) 1992-03-12
WO1991000788A1 (fr) 1991-01-24
ES2043381T3 (es) 1993-12-16
CA2035028A1 (fr) 1991-01-09
EP0433419B1 (fr) 1993-06-16

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