EP0630712B1 - Busette de coulée immergée - Google Patents

Busette de coulée immergée Download PDF

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Publication number
EP0630712B1
EP0630712B1 EP94104560A EP94104560A EP0630712B1 EP 0630712 B1 EP0630712 B1 EP 0630712B1 EP 94104560 A EP94104560 A EP 94104560A EP 94104560 A EP94104560 A EP 94104560A EP 0630712 B1 EP0630712 B1 EP 0630712B1
Authority
EP
European Patent Office
Prior art keywords
immersion nozzle
moulded
immersion
section
brick
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
EP94104560A
Other languages
German (de)
English (en)
Other versions
EP0630712A1 (fr
Inventor
Ernst Lührsen
Siegfried Pohl
Karl Baum
Erich Galle
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.)
Didier Werke AG
Original Assignee
Didier Werke 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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0630712A1 publication Critical patent/EP0630712A1/fr
Application granted granted Critical
Publication of EP0630712B1 publication Critical patent/EP0630712B1/fr
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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/52—Manufacturing or repairing thereof
    • 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
    • B22D41/502—Connection arrangements; Sealing means therefor

Definitions

  • the invention relates to an immersion nozzle, in particular for thin slab casting, which is subdivided into an upper and a lower section, the upper section widening towards the lower section in a longitudinal section plane and tapering towards the lower section in a longitudinal section plane perpendicular thereto and the lower section being one Immersion zone forms.
  • Such an immersion nozzle is described in DE 37 09 188 A1. It is subdivided into different lengths, which can consist of different materials. However, the immersion nozzle is a one-piece component. The manufacture of such an immersion nozzle is complex. When worn, it must always be replaced as a whole.
  • DE 40 24 520 C2 describes a connection between the outlet of a metallurgical vessel and an immersion spout.
  • a concentric annular space with a feed line for inert gas is provided in the area of the seat of the immersion spout at the outlet.
  • a compressible ring is arranged below the annular space as a sealing ring.
  • a display device for the gas pressure present in the annular space is provided in the feed of the inert gas. If a leak occurs on one of the sealing rings, the gas pressure drops and the display device issues an alarm signal.
  • the object of the invention is to propose an immersion nozzle of the type mentioned at the outset, the manufacture of which is simplified and in which individual sections of the immersion nozzle are interchangeable.
  • each of the sections is formed by at least one separate molded block, the molded blocks engaging at their mutually facing ends and a seal being arranged between the interlocking ends of the molded blocks.
  • the immersion nozzle is composed of at least two separate shaped blocks made of refractory ceramic material simplifies production. Because each of the different shaped stones in the basic shape and in the flow cross section can be manufactured in a way that is favorable for him. In addition, each of the shaped stones can be produced from the refractory ceramic material corresponding to its thermal or melt-related stress.
  • the construction according to the invention is also advantageous when adapting the immersion spout to different metallurgical vessels, from which the immersion spout is intended to guide the molten metal in geometrically different molds, because identical shaped stones forming the upper section are assembled with different shaped stones forming the lower section and vice versa can.
  • a kit of shaped stones can thus be kept ready, the appropriate shaped stones being selected from the kit in the respective case of need.
  • the seal between the interlocking ends of the shaped blocks prevents outside air from entering the interior of the immersion spout.
  • the seal absorbs different thermal expansions of the shaped blocks. Such different thermal expansions can result from different thermal expansion coefficients of the materials used for the shaped blocks and / or due to the different temperatures at the shaped blocks.
  • the seal also makes it possible to move the two shaped blocks relative to one another. This makes it easier to insert the immersion zone, in particular an immersion zone that is closely matched to the cross section of the mold, into the mold.
  • the seal is preferably formed by an annular channel in the interlocking ends of the shaped blocks, with compressible sealing rings being arranged above and below the annular channel. Such a seal is described in DE 40 24 520 C2.
  • the molded block forming the immersion zone is a separate component, it is easily possible to form longitudinal webs in this molded block, which have a favorable influence on the melt flow.
  • the upper section of the immersion spout is preferably formed from two separate shaped stones, one shaped stone forming a tubular inlet channel for the melt and the other shaped stone forming a flow shaft which tapers downward in a longitudinal sectional plane and widens downward in a longitudinal sectional plane perpendicular thereto.
  • the immersion nozzle is composed of three shaped stones which are sealed off from one another in the manner described.
  • the shaped block forming the inlet channel can be made of a different refractory ceramic material than the geometrically more difficult shaped block forming the widening and narrowing flow shaft.
  • An immersion spout 1 made of refractory ceramic materials has a flange 2 at the top with which it can be fastened to an outlet of a metallurgical vessel (not shown in more detail).
  • the immersion nozzle 1 is composed of three shaped stones 3, 4, 5.
  • the upper molded block 3 and the middle molded block 4 form an upper section 6 of the immersion spout 1 and the lower molded block 5 represents a lower section 7 of the immersion spout 1.
  • the lower molded block 5 forms the immersion zone 8 with which it enters the melt of a mold K protrudes.
  • the lower shaped block 5 is dimensioned in the area of the mold K so that it closely occupies the width B and the length L of the mold K, the length L being substantially greater than the width B, as is customary in the case of a thin slab mold.
  • the lower molded block 5 is accordingly designed as thin-walled as possible in the immersion zone 8, in any case thinner-walled than the immersion spout for the rest.
  • FIGS. 1 and 2 fracture lines a, b are shown, which represent the shortening of the heights of the shaped block 3 and the shaped block 5.
  • Figure 1 further break lines c are included, which represent the shortening of the shaped blocks 4 and 5 with respect to the length of the mold K.
  • the shaped block 3 has an essentially tubular shape and forms a cylindrical inlet channel 9 for the melt. At its lower end 10, the upper shaped block 3 tapers conically. It is inserted with this end 10 in an upwardly conically widening end 11 of the middle shaped block 4.
  • the middle shaped block 4 forms a flow shaft 12, which widens in the longitudinal sectional plane of FIG. 1 with respect to the inlet channel 9 towards the lower shaped block 5.
  • the flow shaft 12 of the middle shaped block 4 tapers from the inlet channel 9 to the lower shaped block 5.
  • the flow shaft 12 of the middle shaped block 4 thus has the same shape in the area in which it merges into the flow cross section 13 of the lower shaped block 5.
  • a transverse web 14 is formed in the middle shaped block 4, which deflects the melt flow in the direction of the expansion of the flow shaft 12.
  • the middle shaped block 4 tapers conically at its lower end 15. This lower end 15 engages in a conically widening upper end 16 of the lower shaped block 5.
  • Longitudinal webs 17 are formed within the flow cross-section 13 of the lower shaped block 5 and run parallel to the longitudinal axis A of the immersion spout 1 or at an angle to the same.
  • the longitudinal webs 17 serve to stabilize the lower molded block 5 and / or to divide and align the melt flow flowing through the flow cross section 13 of the lower molded block 5.
  • the lower molded block 5 has a plurality of outlet openings 18, 19 at its lower end, which plunges into the mold K.
  • the outlet openings 18, 19 are delimited by opening edges 18 ', 19'.
  • the opening edges 18 ', 19' lie obliquely to the horizontal or obliquely to the vertical longitudinal axis A.
  • the opening edges 18 'near the center or the longitudinal axis A run less steeply than the opening edges 19 lying further out '(see Figure 1).
  • the uniform melt distribution in the mold K is improved, even if the lower molded block 5 is not particularly close to the length L of the mold K.
  • FIG. 3 shows various cross-sectional shapes of the design of the flow cross section 13 of the lower shaped block 5.
  • the flow channels designed in the lower form 5 can then be circular or trapezoidal with different diameters. Other cross-sectional shapes are also possible.
  • a seal 20 is provided between the lower end 10 and the upper end 11 and the lower end 15 and the upper end 16 of the shaped blocks 3, 4, 5.
  • This consists of an annular channel 21 in the upper end 11 and 16 respectively Shaped stones 4 and 5 and a compressible sealing ring 22, which is inserted above the ring channel 21 between the ends and a compressible sealing ring 23, which is inserted below the ring channel 21 between the ends.
  • the sealing rings 22, 23 can consist of a ceramic fiber material and can also be connected to one another.
  • a gas line 24, which is under the pressure of an inert gas, is connected to the ring channel 21.
  • the inert gas pressure can be monitored by a display device so that a leak due to the pressure drop can be determined.
  • the middle shaped block 4, together with the lower shaped block 5, can be pivoted about the longitudinal axis A with respect to the upper shaped block 3, because the ends 10, 11 engage in a rotationally symmetrical manner.
  • a holding device 26 On the lower molded block 5 there are outwardly projecting surfaces 25 above the immersion zone 8. These surfaces 25 can be gripped by a holding device 26 by means of angles 27. This makes it possible to hold the three shaped stones 3, 4, 5 of the immersion spout 1 securely together during operation, without the ends 10, 11; 15, 16 special axially acting connecting means are provided. This holding device 26 also allows the immersion spout 1 to be introduced securely into the mold 1, to be held therein and to be moved out of it. In addition, this holding device 26 also makes it easy to replace individual shaped blocks 3, 4, 5.
  • the shaped blocks 3, 4, 5 can consist of different refractory ceramic materials and can be produced in different processes.
  • the upper molded block 3 can consist of an Al 2 O 3 -C and be produced in an isostatic process.
  • the middle shaped block 4 can consist of Al 2 O 3 and be produced in another process.
  • the lower shaped block 5 can be made from ZrO 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)

Claims (9)

  1. Busette de coulée immergée, notamment pour la coulée de brammes minces, qui est divisée en un tronçon supérieur et un tronçon inférieur, le tronçon supérieur, dans un plan de coupe longitudinal, s'évasant en direction du tronçon inférieur et, dans un plan de coupe longitudinal perpendiculaire au premier, se rétrécissant en direction du tronçon inférieur et le tronçon inférieur formant une zone immergée, caractérisée par le fait que chacun des tronçons (6, 7) est formé d'au moins une brique moulée (3, 4; 5) distincte, les briques moulées 3, 4, 5) s'engageant l'une dans l'autre au niveau de leurs extrémités (10, 11; 15, 16) en vis-à-vis et un joint (20) étant disposé entre les extrémités (10, 11; 15, 16) rentrant l'une dans l'autre des briques moulées (3, 4, 5).
  2. Busette de coulée immergée selon la revendication 1, caractérisée par le fait que le tronçon supérieur (6) est constitué de deux briques moulées (3, 4) distinctes, l'une (3) des briques formant un canal (9) d'entrée tubulaire pour le bain de coulée et l'autre (4) brique formant un conduit d'écoulement qui, dans un plan de coupe longitudinal, s'évase en direction du bas et, dans un plan de coupe longitudinal perpendiculaire au premier, se rétrécit en direction du bas.
  3. Busette de coulée immergée selon la revendication 1 ou la revendication 2, caractérisée par le fait que les extrémités (10, 11; 15, 16) s'engagent l'une dans l'autre par des tronçons coniques.
  4. Busette de coulée immergée selon l'une des revendications précédentes, caractérisée par le fait que la brique moulée (3, 4) qui est située au-dessus pénètre dans la brique moulée (4, 5) qui est située en-dessous.
  5. Busette de coulée immergée selon l'une des revendications précédentes, caractérisée par le fait que la brique moulée (5) inférieure qui constitue la zone immergée (8) est pourvue de cloisons (17) longitudinales dans sa section d'écoulement (13).
  6. Busette de coulée immergée selon l'une des revendications précédentes, caractérisée par le fait que la brique moulée (5) inférieure forme des orifices de sortie (18) ouverts vers le bas.
  7. Busette de coulée immergée selon l'une des revendications précédentes, caractérisée par le fait que la brique moulée (5) inférieure forme des bords d'orifice (18', 19') inclinés par rapport à l'horizontale.
  8. Busette de coulée immergée selon l'une des revendications précédentes, caractérisée par le fait que la brique moulée (5) inférieure comporte des surfaces (25) en saillie vers l'extérieur derrière lesquelles agit un dispositif de fixation (26).
  9. Busette de coulée immergée selon l'une des revendications précédentes, caractérisée par le fait que le joint (20) comprend un canal (21) annulaire et, au-dessus et en-dessous de celui-ci, des bagues d'étanchéité (22, 23) compressibles.
EP94104560A 1993-06-23 1994-03-23 Busette de coulée immergée Expired - Lifetime EP0630712B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4320723 1993-06-23
DE4320723A DE4320723A1 (de) 1993-06-23 1993-06-23 Eintauchausguß

Publications (2)

Publication Number Publication Date
EP0630712A1 EP0630712A1 (fr) 1994-12-28
EP0630712B1 true EP0630712B1 (fr) 1996-10-02

Family

ID=6490950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104560A Expired - Lifetime EP0630712B1 (fr) 1993-06-23 1994-03-23 Busette de coulée immergée

Country Status (5)

Country Link
US (1) US5429283A (fr)
EP (1) EP0630712B1 (fr)
JP (1) JPH079097A (fr)
KR (1) KR950000266A (fr)
DE (2) DE4320723A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1267284B1 (it) * 1994-08-08 1997-01-28 Danieli Off Mecc Scaricatore per colata continua
USD384484S (en) * 1995-03-17 1997-09-30 Deguisa, S.A. Nozzle for tapping containers
DE19512208C1 (de) * 1995-03-21 1996-07-18 Mannesmann Ag Tauchausguß zum Gießen von Metall
JP3096635B2 (ja) * 1996-03-29 2000-10-10 住友金属工業株式会社 偏平状の連続鋳造用ノズル
DE19623787C2 (de) * 1996-06-04 1998-07-02 Mannesmann Ag Verfahren und Vorrichtung zum Ausgießen von Stahl aus einem Tauchausguß
DE19628512C1 (de) * 1996-07-05 1997-09-04 Mannesmann Ag Vorrichtung zum Schmelztauchbeschichten von Metallband
AU727845B2 (en) * 1996-07-29 2001-01-04 Mannesmann Aktiengesellschaft Immersion nozzle for pouring molten metal (joint point)
FR2763524A1 (fr) * 1997-05-23 1998-11-27 Vesuvius France Sa Installation pour la coulee continue d'un metal liquide, et organe pour cette installation
DE19724232C2 (de) * 1997-06-03 1999-04-15 Mannesmann Ag Verfahren und Vorrichtung zum Erzeugen von Brammen
DE19738385C2 (de) * 1997-09-03 2000-02-24 Schloemann Siemag Ag Tauchgießrohr zum Einleiten von Schmelze aus einem Gieß- oder Zwischenbehälter in eine Kokille
DE19758071C1 (de) * 1997-12-30 1999-08-26 Didier Werke Ag Halterung von Teilen eines mehrteiligen Kanals
KR100450438B1 (ko) * 2001-11-09 2004-10-01 조선내화 주식회사 연속주조용 하부노즐과 침지노즐 사이에 설치되는 씰링재
KR100817132B1 (ko) * 2002-03-15 2008-03-27 엘지.필립스 엘시디 주식회사 액정적하장치
DE102008058647A1 (de) 2008-11-22 2010-06-10 Refractory Intellectual Property Gmbh & Co. Kg Tauchausguss
EP2792433A1 (fr) * 2013-04-16 2014-10-22 Refractory Intellectual Property GmbH & Co. KG Système d'étanchéité de préférence dans une grille coulissante sur le bec d'un récipient métallurgique et logement de bec
KR101722951B1 (ko) * 2015-08-03 2017-04-04 주식회사 포스코 침지 노즐
EP3332891A1 (fr) * 2016-12-12 2018-06-13 ABB Schweiz AG Ensemble pour un procédé de marquage de métaux
CN109382506B (zh) * 2018-11-20 2020-10-23 山东钢铁股份有限公司 一种减少连铸过程中钢水增氮量的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1239458A (fr) * 1968-07-31 1971-07-14
US3934638A (en) * 1971-02-08 1976-01-27 Inland Steel Company Continuous casting process
DE3704326A1 (de) * 1987-02-12 1988-08-25 Didier Werke Ag Ausgusskoerper
DE3709188A1 (de) * 1987-03-20 1988-09-29 Mannesmann Ag Ausgiessrohr fuer metallurgische gefaesse
ATE54591T1 (de) * 1987-04-07 1990-08-15 Mueller Weingarten Maschf Saugrohr fuer vakuum-druckgiessmaschine.
US5205343A (en) * 1989-06-03 1993-04-27 Sms Schloemann-Siemag Aktiengesellschaft Pouring tube for feeding molten steel into a continuous casting mold
DE4024520A1 (de) * 1990-08-02 1992-02-06 Didier Werke Ag Verbindung zwischen dem auslauf eines metallurgischen gefaesses und einem schutzrohr oder eintauchausguss

Also Published As

Publication number Publication date
DE4320723A1 (de) 1995-01-05
EP0630712A1 (fr) 1994-12-28
DE59400755D1 (de) 1996-11-07
JPH079097A (ja) 1995-01-13
KR950000266A (ko) 1995-01-03
US5429283A (en) 1995-07-04

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