EP0433419B2 - Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen - Google Patents

Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen Download PDF

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Publication number
EP0433419B2
EP0433419B2 EP90909701A EP90909701A EP0433419B2 EP 0433419 B2 EP0433419 B2 EP 0433419B2 EP 90909701 A EP90909701 A EP 90909701A EP 90909701 A EP90909701 A EP 90909701A EP 0433419 B2 EP0433419 B2 EP 0433419B2
Authority
EP
European Patent Office
Prior art keywords
starter
tube
melt
starting
vessel
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
EP90909701A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0433419A1 (de
EP0433419B1 (de
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(B2) "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/de
Application granted granted Critical
Publication of EP0433419B1 publication Critical patent/EP0433419B1/de
Publication of EP0433419B2 publication Critical patent/EP0433419B2/de
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
    • B22D11/10—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 Slider closure on the pouring opening of a tundish and one when filling the Vessel with molten metal that blocks the inlet of the pouring spout.
  • the predetermined breaking point is known, which is influenced by the burn-through and / or the buoyancy of the melt breaks.
  • the broken pipe piece floats and gives the melt the way to the pouring spout of the vessel over the remaining tube on the bottom of the vessel.
  • the approval process is from the functional effectiveness of the predetermined breaking point at a desired time.
  • the predetermined breaking point If the predetermined breaking point is not in time, the break must be brought about by handling a rod from the outside on the other hand, which is tedious and time-consuming and time-consuming, especially in multi-line systems the predetermined breaking point can function earlier than intended, so that floating on the melt Slag is entrained into the pouring spout 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 at the start of pulling off the cold strand.
  • the object of the present invention is to effectively improve starting devices of the type mentioned and, above all, automatically enable timely release of slag-free melt on the start pipe.
  • the object is achieved according to the invention with the features of claim 1.
  • This is the release of the starter and thus the release of the melt flow solely dependent on the lift potential of the starting body, the in selection with the body height and the free length of the starting tube. That means the Release phase runs freely, in contrast to a device in which a detachable part on a fixed Part is arranged by means of a connection to be destroyed. Seen as a whole, the casting on of Continuous casting plants are more timely, more accurate and safer, even with multiple continuous casting plants. Furthermore the melt level forming in the distribution vessel can be covered with a covering powder at an early stage, that keeps the melt warm and thus prevents freezing in the slide closure without flowing off of slag, covering powder together with the melt in the mold is to be feared
  • the procedure according to the invention is such that a hollow body-shaped starting body is extended of the start pipe lies loosely on its inlet end.
  • a hollow cylindrical one is available Body that is cheap in terms of manufacture and that works together with the distribution vessel before use can be effectively heated. It is advantageous for the starting body to run along the inside or outside to give the starting tube and an annular gap between the two bodies, which places the starting body and loosely guides when the body floats on.
  • the invention is furthermore to be seen in the fact that instead of an optionally equipped with a guide, on the inlet end of the starting tube, a starting body protruding from the starting tube, inside or outside tubular starter body with an annular gap is provided, the tubular Support the starting body on the bottom of the vessel or on the starting tube. Both with one on the starting tube leave on top with a guide start body, as well as with a tubular start body the starting tube and the starting body are conical in the same way. As a result, the annular gap between Starting tube and starting body larger in accordance with the climbing speed of the starting body, which is a gentle one The melt runs out over the inlet end of the start pipe.
  • the invention proposes furthermore, that the area of the starting body opposite the drain openings as a seal, preferably is designed as an elastic ceramic fiber seal, which in addition to a functional Works the device contributes.
  • a molten steel flow flows from a regulated spout of a ladle, not shown A in a distribution vessel that a sheet metal jacket 2, a refractory lining 3 and one in Vessel bottom 4 arranged spout 5 has.
  • melt 6 on which a slag blanket 7 floats out of impurities, for example in the form of oxides and a covering powder May exist, which is abandoned to reoxidation and heat radiation from the melt submissions.
  • it is important to prevent that when filling the distribution vessel 1 with melt 6, resting on non-metallic mass.
  • Slag 7 in the pouring opening 5 and thus over the slide closure 8 and the dip tube 9 enters the continuous casting mold 10. Arrived there would slag 7 deposit on the cold strand 11 and inevitably when the strand withdrawal device is switched on lead to a melt breakthrough.
  • the pouring opening 5 is coaxially closed this fireproof starting tube 12 arranged on the vessel bottom 4 is shut off. It also serves as a barrier a refractory hollow cylindrical starting body 13, which rests loosely on the inlet end 12a of the starting tube 12 and has a lower mass density than the melt to be cast 6.
  • the starting body 13 represents an extension of the start tube 12 in order to cause a certain one in the distribution vessel 1 Melting level 6a with a fill level H is reached before the melt 6 flows out via the start pipe inlet end 12a begins by floating the starting body 13 as shown in broken lines.
  • the starting body 13 as a function of its density and the length of the starting tube 12 its extension requires an appropriate body height 13a of the starting body 13. This also loses the increase in the melting level 6a constantly in weight, but only increases when the risk of Shrinkage 7 slag together with melt 6 no longer exists.
  • the outflow of melt begins calmly and evenly via the inlet end 12a of the starting tube 12, that means without runoff turbulence, so that when the starting body 13 begins to lift, the slag cover 7 need not be too far from the inlet end 12a of the starting tube 12.
  • the melt level 6a rises under the outflow of melt 6 through the pouring opening 5 into the mold until the target fill level of the tundish, not shown in the drawing 1 is reached. Thereafter, the target level is reached in terms of control technology, in coordination with the the flow to the mold 10 controlling slide closure 8 at the spout 5 of the distribution vessel 1.
  • the starting body 15 shown in FIG. 2 is designed like a cap. He has one outer guide 15a, which surrounds the inlet end 16a of the starting tube 16 and thus an unwanted slipping prevented.
  • the melt 6 enters the starting tube 16 in the annular gap 17 between the guide 15a and the starting tube 16.
  • 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 with a inner conical guide 18a engages in the inlet end 19a. This in turn, leaving one at Floating of the starter body 18 is an ever-increasing annular gap 20, in which an equally constantly larger one increasing amount of melt flows.
  • the starting tube 21 is at the inlet end 21a with leading, saw-like Influence passages 21c and near the vessel bottom 4 provided with radial drain openings 21b.
  • a tubular Starting body 22 surrounds starting tube 21 centrally by means of an annular gap 23.
  • the drainage openings 21b by a seal 22a arranged on the starting body 22 and bridging the gap 23 closed, which consists for example of glued ceramic, resilient fiber material.
  • the starting body 22 begins to float after reaching the fill level H and gradually gives out first the drain openings 21b for the drain of melt 6 into the pouring opening. In the further rise of the starting body 22 then there is an equally gradual release of melt 6 at the inlet end 21a of the Starting tube 21 via the influence passages 21c widening in the height direction.
  • the drain openings 21b can be elongated holes 24 or be designed as ring rows of smaller discharge openings 25.
  • the drain openings 26b arranged in the vessel bottom near 4 from an inverted one equally conical starting body 27 are covered using its own weight.
  • the starting body 27 has a sealing surface 27a which also bridges an annular gap 28 and which Floating of the starting body 27 after the melt fill level H has been reached gently opens the drain openings 26b.
  • the annular gap 28 widens just as gently to allow melt 6 to flow off via the inlet end 26a of the starting tube 26.
  • the device according to FIG. 4 can also work without drain openings 21b and seals 22a.
  • the starting tube 26 can be conical in reverse and the starting body 27 with its sealing surface 27a act inside the starting tube 26.
  • the new starting device can also be used in the described design on continuous casting plants, who work alone with nozzle 5 on the tundish 1.

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)
EP90909701A 1989-07-08 1990-06-27 Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen Expired - Lifetime EP0433419B2 (de)

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
DE3922549A DE3922549A1 (de) 1989-07-08 1989-07-08 Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen
DE3922549 1989-07-08
PCT/EP1990/001025 WO1991000788A1 (de) 1989-07-08 1990-06-27 Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen

Publications (3)

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

Family

ID=6384608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909701A Expired - Lifetime EP0433419B2 (de) 1989-07-08 1990-06-27 Vorrichtung zum schlackenfreien angiessen von stranggiessanlagen

Country Status (7)

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

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 (en) * 2012-12-17 2014-06-26 Polar Sapphire Ltd. A method and apparatus for melting aluminum oxide

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

Also Published As

Publication number Publication date
JPH04501385A (ja) 1992-03-12
US5191926A (en) 1993-03-09
EP0433419A1 (de) 1991-06-26
DE59001788D1 (de) 1993-07-22
CA2035028A1 (en) 1991-01-09
DE3922549A1 (de) 1991-01-10
DE3922549C2 (enrdf_load_stackoverflow) 1991-07-18
WO1991000788A1 (de) 1991-01-24
ES2043381T3 (es) 1993-12-16
EP0433419B1 (de) 1993-06-16

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