EP2355946B1 - Bec plongeur de coulée - Google Patents

Bec plongeur de coulée Download PDF

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Publication number
EP2355946B1
EP2355946B1 EP09744083.8A EP09744083A EP2355946B1 EP 2355946 B1 EP2355946 B1 EP 2355946B1 EP 09744083 A EP09744083 A EP 09744083A EP 2355946 B1 EP2355946 B1 EP 2355946B1
Authority
EP
European Patent Office
Prior art keywords
chamber
pouring channel
gas bubbles
melt
shaped body
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.)
Not-in-force
Application number
EP09744083.8A
Other languages
German (de)
English (en)
Other versions
EP2355946A1 (fr
Inventor
Gernot Hackl
Gerald Nitzl
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
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 Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Publication of EP2355946A1 publication Critical patent/EP2355946A1/fr
Application granted granted Critical
Publication of EP2355946B1 publication Critical patent/EP2355946B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a diving spout, as used for example in the continuous casting of a molten metal.
  • the immersion nozzle comprises a tubular body and a pouring passage extending from a first end portion of the tubular body at which a molten metal enters the pouring passage to a second end portion at which the molten metal leaves the pouring passage via at least one exit port. It can be seen from the document that immersion nozzles with two diametrically opposite lateral outlet openings also belong to the state of the art, so that the melt is laterally deflected from an initially purely vertical flow direction in two directions before it emerges from the immersion tube.
  • a disadvantage of this process technology is that partly gas bubbles of considerable size arise and are conducted with the melt stream into the metallurgical melt pool.
  • Such gas bubbles can have a diameter of several millimeters, but in some cases also diameters in the centimeter range.
  • the invention would like to offer a submersible nozzle, which allows the transport of a molten metal into a metallurgical melting vessel as far as possible without interference even if the melt entrains gas bubbles.
  • the described formation of gas bubbles, even larger gas bubbles, can not be prevented in principle, on the contrary: it is metallurgically necessary for certain applications.
  • the inventive concept is to make the existing gas bubbles harmless as possible.
  • the invention is based on the consideration to provide a way to remove the gas bubbles from the melt stream before the molten metal is passed from the dip tube into a molten bath of a metallurgical melting vessel.
  • the invention makes use of the fact that gas bubbles rise (float) within a molten metal.
  • the tendency of the gas bubbles to rise is greater, the larger the gas bubbles are and the lower the viscosity of the molten metal. This means that in particular the unwanted large gas bubbles with a diameter >> 1 mm, can be removed from the melt more easily than small gas bubbles.
  • the concrete concept of the invention consists in providing a chamber from the dip tube immediately before leaving the melt, into which such gas bubbles can rise (escape).
  • the chamber acts as a collecting container or buffer vessel for the said gas bubbles before they enter the molten bath (in the mold).
  • the invention accordingly relates to a diving nozzle with the features of claim 1.
  • the melt in the pouring channel initially runs vertically from top to bottom, before being divided and under a Angle of approximately 60 ° is led away from the immersion nozzle by two diametrically opposite lateral outlet openings.
  • the invention now provides, at the second end portion of the immersion nozzle to provide a chamber which is in fluid communication with the pouring channel, so that gas bubbles, which are carried along with the melt stream, can rise from the melt stream into the chamber and so from the part of the melt are removed, which flows into the metallurgical melting vessel or in its molten bath.
  • the chamber may extend from a portion of the pouring channel along which the molten metal flows at an angle> 0 and ⁇ 90 ° to the axial direction of the tubular body. If the flow conditions in the metallurgical vessel allow, the angle can also be ⁇ 90 °, which enhances the tendency of gas bubble deposition.
  • the chamber adjoins the casting channel substantially radially outside, so that the boundary wall of the pouring channel forms an inner wall of the chamber.
  • the collecting space for the gas may also run in an annular manner around the pouring channel or be spaced apart from one another by a plurality of chambers.
  • each chamber being associated with one of two melt streams at the outlet end.
  • the invention further provides for the chamber to be formed at a distance from the first connection region with the pouring channel with at least one second connection region (an opening) to the pouring channel, so that the chamber receives a type of bypass function.
  • Gas bubbles which at the bottom of the chamber (viewed in the main flow direction of the melt) have risen up into the chamber, so at the upper end of the chamber, that is, the end of the chamber, which faces the first end portion of the pouring channel again be returned to the pouring channel and thus into the melt stream. It has been found that when recycling the relatively large gas bubbles in the melt stream it comes to a crushing of the gas bubbles to a largely innocuous measure.
  • the gas is not removed from the system; but the gas bubbles are crushed and indeed to such a degree that they no longer cause the problems mentioned even after entering the molten bath in the metallurgical vessel. Rather, then the crushed gas bubbles can rise slowly, without turbulence and without destruction of slag and G confusepulver Mrs.
  • the pouring channel itself and its course, in particular in the second end section, towards the outlet opening or the outlet openings can be designed according to the prior art. It is advantageous if the pouring channel in the second section is designed so that the molten metal flows out of the outlet opening at an angle of> 0 and ⁇ 90 ° to the axial direction of the tubular body, because this calms the melt stream and the gas bubbles can still rise sufficiently upwards ,
  • Said flow angle can be limited to> 45 ° and ⁇ 75 ° according to another embodiment.
  • the immersion nozzle can be produced by conventional process techniques and using refractory materials, for example, as a casting or pressing part of an offset based on an Al 2 O 3 , TiO 2 , ZrO 2 , MgO, CaO etc ..
  • the transition region (opening region) between the pouring channel and chamber will have a cross-sectional area of 7-30 cm 2 and the chamber as a whole a volume of, for example, 50-250 cm 3 , starting from an immersion nozzle having a length of 900 mm and an outer diameter of 120 mm , a diameter of the pouring channel of 70 mm and a cross-sectional area of the outlet opening / s of about 50 cm 2 .
  • the figure shows a submersible nozzle with a tubular body 10, a pouring channel 12 extending substantially concentric with the axial center longitudinal axis L of the tubular body, from a first end portion 14 of the tubular body in which a molten metal enters the pouring channel to a second End section 16, at which the molten metal leaves the pouring channel 12 via two lateral outlet openings 18.1, 18.2.
  • the pouring channel 12 in the region of the second end section 16 is designed such that the molten metal changes its originally purely vertical flow direction (arrow V) and the melt stream changes into two partial streams (arrows T1, T2), which initially at an angle ⁇ of about 50 ° to the flow direction V in the direction of the outlet openings 18.1, 18.2.
  • these gas bubbles may have a different size. Schematically, this is indicated in the right part of the figure by the arrows A, B and C, where C indicates a typical flow direction of large gas bubbles, B a typical flow direction for medium sized gas bubbles and A indicates the direction in which the smallest gas bubbles in the molten bath S out become.
  • C indicates a typical flow direction of large gas bubbles
  • B a typical flow direction for medium sized gas bubbles
  • A indicates the direction in which the smallest gas bubbles in the molten bath S out become.
  • the larger gas bubbles in particular those with a diameter of more than 1 mm, rise upwards in the molten bath S and cause the abovementioned metallurgical problems.
  • these larger gas bubbles can break up a slag layer 26 resting on the molten bath and / or a casting powder layer, as is also schematically indicated in the right-hand part of the figure.
  • an inventive diving spout differs by the geometry shown on the left in the figure.
  • the dip tube is extended at opposite areas of the lower end portion 16 to the outside in each case by a chamber 20 which is bounded by an upper wall surface 20 o, a subsequent, outer and lateral, parallel to the body 10 extending wall surface 20 s and a part of the body 10 and down (towards the face plate 15) is open.
  • a chamber 20 which is bounded by an upper wall surface 20 o, a subsequent, outer and lateral, parallel to the body 10 extending wall surface 20 s and a part of the body 10 and down (towards the face plate 15) is open.
  • an opening 21 is arranged in the body 10, which creates a fluidic connection between the interior of the body 10 (which is the pouring channel 12) and the chamber 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (6)

  1. Goulotte d'immersion ayant les caractéristiques suivantes :
    1. 1 un corps de forme tubulaire (10),
    1. 2 un canal de coulée (12) qui s'étend depuis une première section terminale (14) du corps de forme tubulaire (10) au niveau de laquelle une coulée métallique pénètre dans le canal de coulée (12) jusqu'à une seconde section terminale (16) au niveau de laquelle la coulée métallique quitte le canal de coulée (12) par au moins un orifice de sortie (18.1, 18.2),
    1.3 au moins une chambre (20) située au niveau de la seconde section terminale (16,) et qui passe dans le sens d'écoulement de la coulée métallique derrière l'orifice de sortie respectif (18.1, 18.2) et s'étend dans le sens de la première section terminale (14), la chambre (20) étant limitée à l'intérieur par le corps de forme tubulaire (10),
    caractérisée par
    1.4 au moins un orifice de liaison (21) entre la chambre (20) et le canal de coulée (12).
  2. Goulotte d'immersion selon la revendication 1, dans laquelle la chambre (20) s'étend sensiblement en parallèle au canal de coulée (12).
  3. Goulotte d'immersion selon la revendication 1, dans laquelle la chambre (20) s'étend depuis une section du canal de coulée (12) le long duquel la coulée métallique coule suivant un angle > 0 et < 90 degrés par rapport au sens axial du corps de forme tubulaire (10).
  4. Goulotte d'immersion selon la revendication 1, dans laquelle l'orifice (21) est voisin d'une extrémité supérieure de la chambre (20).
  5. Goulotte d'immersion selon la revendication 1, dans laquelle le canal de coulée (12) est conçu à sa seconde extrémité terminale de manière à ce que la coulée métallique s'écoule de l'orifice de sortie (18.1, 18.2) suivant un angle > 0 et < 90 degrés par rapport au sens axial du corps de forme tubulaire (10).
  6. Goulotte d'immersion selon la revendication 1, dans laquelle le canal de coulée (12) est conçu à sa seconde extrémité terminale (16) de manière à ce que la coulée métallique s'écoule de l'orifice de sortie suivant un angle > 45 et < 75 degrés par rapport au sens axial du corps de forme tubulaire (10).
EP09744083.8A 2008-11-22 2009-10-29 Bec plongeur de coulée Not-in-force EP2355946B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008058647A DE102008058647A1 (de) 2008-11-22 2008-11-22 Tauchausguss
PCT/EP2009/007731 WO2010057566A1 (fr) 2008-11-22 2009-10-29 Bec plongeur de coulée

Publications (2)

Publication Number Publication Date
EP2355946A1 EP2355946A1 (fr) 2011-08-17
EP2355946B1 true EP2355946B1 (fr) 2013-11-20

Family

ID=41350663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09744083.8A Not-in-force EP2355946B1 (fr) 2008-11-22 2009-10-29 Bec plongeur de coulée

Country Status (10)

Country Link
US (1) US8517231B2 (fr)
EP (1) EP2355946B1 (fr)
CN (1) CN102239019B (fr)
BR (1) BRPI0920957A2 (fr)
CA (1) CA2743224C (fr)
DE (1) DE102008058647A1 (fr)
MX (1) MX2011005327A (fr)
RU (1) RU2476292C2 (fr)
TW (1) TW201021943A (fr)
WO (1) WO2010057566A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2815820B9 (fr) * 2013-06-20 2017-03-01 Refractory Intellectual Property GmbH & Co. KG Buse d'entrée immergée réfractaire
JP2016535677A (ja) * 2013-11-07 2016-11-17 ベスビウス クルーシブル カンパニー 金属梁の鋳造用ノズル
CN107552765B (zh) * 2017-08-11 2020-07-28 徐州东力锻压机械有限公司 一种用于铸造的升液管

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349838A (en) 1965-06-04 1967-10-31 American Smelting Refining Float control valve for continuous casting
DE1959097C2 (de) * 1969-11-20 1973-10-04 Mannesmann Ag, 4000 Duesseldorf Vorrichtung beim Stranggießen zum Ver teilen eiern Stahlschmelze
FR2227728A5 (en) * 1973-04-26 1974-11-22 Monoplast Intermittent liquid pouring spout - has cup facing inlet nozzle inside peripheral skirt forming annular outlet
US4487251A (en) * 1982-03-08 1984-12-11 Vesuvius Crucible Company Continuous casting apparatus and a method of using the same
JPH07227B2 (ja) 1985-08-29 1995-01-11 黒崎窯業株式会社 浸漬ノズル及びその製造方法
DE4317620C1 (de) 1993-02-08 1994-08-11 Max Planck Inst Eisenforschung Verfahren zum Abscheiden nichtmetallischer Einschlüsse aus flüssigen Metallen und keramische Kammer dafür
DE4320723A1 (de) * 1993-06-23 1995-01-05 Didier Werke Ag Eintauchausguß
AUPN770296A0 (en) * 1996-01-24 1996-02-15 Bhp Steel (Jla) Pty Limited Strip casting
DE19722890A1 (de) * 1997-05-28 1998-12-03 Mannesmann Ag Tauchausguß
GB9906116D0 (en) 1999-03-17 1999-05-12 Didier Werke Ag Refractory product
JP3519013B2 (ja) 1999-03-17 2004-04-12 アルプス電気株式会社 回転コネクタ
IT1317137B1 (it) 2000-03-08 2003-05-27 Danieli Off Mecc Scaricatore perfezionato per colata continua
JP2003266155A (ja) * 2002-03-12 2003-09-24 Nippon Steel Corp 溶鋼の連続鋳造方法およびその連続鋳造に用いる浸漬ノズル
RU2236326C2 (ru) * 2002-11-04 2004-09-20 Хлопонин Виктор Николаевич Способ непрерывной разливки стали из промежуточного ковша в кристаллизатор и погружной стакан для его реализации

Also Published As

Publication number Publication date
CN102239019A (zh) 2011-11-09
TW201021943A (en) 2010-06-16
WO2010057566A1 (fr) 2010-05-27
MX2011005327A (es) 2011-06-24
US20110233237A1 (en) 2011-09-29
US8517231B2 (en) 2013-08-27
CA2743224A1 (fr) 2010-05-27
RU2011120043A (ru) 2012-11-27
BRPI0920957A2 (pt) 2015-12-29
CA2743224C (fr) 2014-03-18
EP2355946A1 (fr) 2011-08-17
RU2476292C2 (ru) 2013-02-27
DE102008058647A1 (de) 2010-06-10
CN102239019B (zh) 2014-04-16

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