EP0059805A1 - Poröser Ausgusstein für einen Behälter für eine Metallschmelze - Google Patents

Poröser Ausgusstein für einen Behälter für eine Metallschmelze Download PDF

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Publication number
EP0059805A1
EP0059805A1 EP19810301019 EP81301019A EP0059805A1 EP 0059805 A1 EP0059805 A1 EP 0059805A1 EP 19810301019 EP19810301019 EP 19810301019 EP 81301019 A EP81301019 A EP 81301019A EP 0059805 A1 EP0059805 A1 EP 0059805A1
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EP
European Patent Office
Prior art keywords
nozzle
porous
gas
porous nozzle
flange
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
EP19810301019
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English (en)
French (fr)
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EP0059805B1 (de
Inventor
Junichi Ato
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Individual
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Individual
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8188235&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0059805(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to EP19810301019 priority Critical patent/EP0059805B1/de
Priority to DE8181301019T priority patent/DE3168852D1/de
Publication of EP0059805A1 publication Critical patent/EP0059805A1/de
Application granted granted Critical
Publication of EP0059805B1 publication Critical patent/EP0059805B1/de
Expired legal-status Critical Current

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    • 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
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/42—Features relating to gas injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • B22D41/58—Pouring-nozzles with gas injecting means

Definitions

  • This invention relates to an improvement in a porous nozzle which is arranged at the bottom of a molten metal vessel, and the objects of which are to float up and separate . the non-metallic inclusions in molten metal in said vessel and to prevent a slag involvement and a nozzle opening closure. More particularly it relates to an improvement of a porous nozzle mounted at the bottom of a ladle or tunidish container of the molten metal vessel.
  • the nozzle of a ladle or tundish container is constructed with a dense refractory.
  • non-metallic inclusions in the molten steel often adhere in the nozzle opening during the flowing-down of the melt to cause a contraction and a closure thereby often bring about troubles in the pouring operation of the melt.
  • a refractory porous plug is arranged at the bottom of a container such as ladle or tundish, and inert gases are jetted into the molten steel through the pores of the porous plug when the non-metallic inclusions are floated u p and separated and the purity of said molten steel is improved.
  • a refractory weir is provided within said vessel to change the flow of the molten steel, and the non-metallic inclusions in the molten steel are floated up and separated.
  • a weir is provided in a tundish container, it exhibits effects in its own way for floating up and separating the non-metallic inclusions.
  • the dimension of tundish is limited because of structure and design of a continuous casting equipment,., however, it is difficult to make an effective weir shape or arrange an effective weir within a comparatively narrow tundish, and it is known that not only the tundish design becomes complicate but also it is difficult to fix a weir within the tundish.
  • porous nozzle arranged in conventional tundishes has effects for preventing contraction and closure of nozzle, but generally in a continuous casting working said nozzle may involve the non-metallic inclusions, slag, etc. which float up by a turbulence generated at the upper portion of the nozzle opening when the ladle is replaced, thereby causing a lowered quality of steel.
  • the present invention provides an integral, flange- shaped, porous nozzle which has in combination a function of jetting inert gases upwardly into the molten steel by a porous plug and a function of jetting the inert gases from the inner peripheral surface of a porous nozzle to prevent the nozzle from closing, and in which the inclusions in the molten steel are floated up and separated whereby the nozzle is prevented from closure, and it can avoid a slag involvement caused by the turbulence generated at the upper portion of the nozzle opening when the ladle is replaced, while allowing a continuous casting of a molten steel of high quality.
  • the porous nozzle of the invention has in combination both the functions of jetting inert gases from the porous refractory layer of the flange portion into the upper portion in the molten steel, and of jetting the inert gases into the nozzle opening.
  • the reason of separating the gas ejection mechanism in the flange upper surface from that in the nozzle opening (lla) is that specifically in a porous nozzle for tundish container, owing to the physical pressure difference between the molten steel static pressure within the tundish, which is received by the upper surface of the flange, and the molten steel kinetic pressure (pressure is reduced based on the Bernoulli's theorem) which is received by the inner peripheral surface of the nozzle during the time when the molten steel flows-down within said nozzle opening, it is necessary to separately adjust the gas blowing pressure in the flange portion and that into the nozzle opening (lla).
  • the present invention has a great number of merits in such that in the case of a closing mechanism of a sliding nozzle (lower nozzle) constituting the lower portion of said porous nozzle, it will suffice only to eject gas from the upper surface of the flange thanks to a plurality of blow openings as arranged, and if necessary it is capable of adjusting the gas ejection and gas pressure freely so as to save the use amount of inert gases.
  • the porous refractory layer of the main body of said porous nozzle is constructed in such a way that between the porous refractory layer of the flange nortion and that of the cylindrical portion there is formed a fine porous refractory layer (6) which is fine porosity and has a great gas resistancy compared with the porous refractory layer of the main porous body, inert gases are guided from the gas blow opening (4) and the gases are jetted, through the gas pool (2), from the upper surface of the flange, permeating the pores of the porous refractory layer (la) of the flange portion, while a part- of the inert gases permeates through the porous refractory layer (lb) of the vertical side through the fine porous refractory layer (6) thereby to be jetted into the nozzle opening.
  • the fine porous refractory layer is not flat in its sectional configuration but it may be of optional shape, and naturally the thickness of said layer is optionally selected and said layer is formed in shape and thickness answering the conditions, considering the permeation and resistance of the gas.
  • Fig. 4 is a schematical sectional view of the porous nozzle of Fig. 2, in which the porous nozzle wherein the ejection mechanism from the flange surface is separated from that into the nozzle opening, is arranged at the bottom of a molten metal vessel. Further, Fig. 4 is also a sectional view of the porous nozzle (1) as arranged, in which a through hole is provided at the bottom of a vessel where a iron casing (7) is lined with refractory bricks (8), said porous nozzle being mounted in the central zone of the inner peripheral surface of a nozzle-receiving brick (9) fixed in said through hole.
  • Fig: 4 is examplified with a porous nozzle being connected at its lower end to a sliding nozzle (10), but said nozzle can naturally be applicable to melt discharging nozzles which adopt a stopper system as a nozzle opening and closing mechanism.
  • the porous nozzle of the invention widens its width in an operable range in the length in the width direction of the flange, the more it produces its effect.
  • the optimum width and thickness of the flange should be selected.
  • the upper surface 6f the flange is shown in a flat configuration, but the shape is not limited to said configuration and there is no trouble in use even if the surface is curved or uneven a little.
  • the porous nozzle has a function for ejecting an inert gas toward the upper portion of the molten metal.
  • the porous nozzle of the invention has been described in detail particularly with respect to a tundish nozzle for molten steel, but the present invention is very useful industrially in that it is applicable to vessels for other molten metals such as copper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP19810301019 1981-03-11 1981-03-11 Poröser Ausgusstein für einen Behälter für eine Metallschmelze Expired EP0059805B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19810301019 EP0059805B1 (de) 1981-03-11 1981-03-11 Poröser Ausgusstein für einen Behälter für eine Metallschmelze
DE8181301019T DE3168852D1 (en) 1981-03-11 1981-03-11 Porous nozzle for molten metal vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19810301019 EP0059805B1 (de) 1981-03-11 1981-03-11 Poröser Ausgusstein für einen Behälter für eine Metallschmelze

Publications (2)

Publication Number Publication Date
EP0059805A1 true EP0059805A1 (de) 1982-09-15
EP0059805B1 EP0059805B1 (de) 1985-02-13

Family

ID=8188235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810301019 Expired EP0059805B1 (de) 1981-03-11 1981-03-11 Poröser Ausgusstein für einen Behälter für eine Metallschmelze

Country Status (2)

Country Link
EP (1) EP0059805B1 (de)
DE (1) DE3168852D1 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543576A1 (fr) * 1983-03-30 1984-10-05 Messer Griesheim Gmbh Procede et installation pour le balayage d'un bain de metal fondu notamment d'acier dans une poche de coulee ou analogue munie d'un bouchon d'obturation
WO1984004477A1 (en) * 1983-05-12 1984-11-22 James Menzies Thornton Composite refractory product
FR2554024A1 (fr) * 1983-11-02 1985-05-03 Didier Werke Ag Busette de coulee a immersion
EP0187924A1 (de) * 1984-11-26 1986-07-23 Cometus AG Verfahren zum Spülen von Metallschmelze und Pfanne zur Durchführung des Verfahrens
GB2173726A (en) * 1985-04-11 1986-10-22 Stopinc Ag Metallurgical discharge sleeves
BE1000818A3 (fr) * 1986-11-13 1989-04-11 Shinagawa Refractories Co Ajutage pour verser du metal fondu.
FR2627715A1 (fr) * 1988-02-26 1989-09-01 Vesuvius Sa Busette de coulee pour ouverture assistee, dispositif l'incorporant et procede de mise en oeuvre
US5072779A (en) * 1987-09-07 1991-12-17 Danieli & C. Officine Meccaniche Spa Continuous casting machine of a reduced height with immersed teeming nozzle
FR2681270A3 (en) * 1991-09-18 1993-03-19 Irsid Nozzle for the continuous casting of liquid metal, particularly steel
FR2683753A1 (fr) * 1991-11-19 1993-05-21 Stopinc Ag Plaque d'obturateur pour un obturateur a tiroir d'une cuve contenant un bain de metal en fusion.
WO2002047846A2 (en) * 2000-12-11 2002-06-20 Vesuvius Crucible Company Casting nozzle with gas injection means
EP3097997A1 (de) * 2015-05-28 2016-11-30 Sheffield Hi-Tech Refractories Germany GmbH Stopfen in einem zusammenwirken mit einer bodenausgussdüse in einem metallurgischen gefäss
JP2021049564A (ja) * 2019-09-26 2021-04-01 黒崎播磨株式会社 タンディッシュ上ノズル構造体及び連続鋳造方法
WO2023047153A1 (en) * 2021-09-24 2023-03-30 Arcelormittal Leak-proof upper tundish nozzle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB834234A (en) * 1955-09-19 1960-05-04 Patentverwertung Ag Process and device for the production of high-quality castings
FR2167284A1 (en) * 1972-01-12 1973-08-24 Siderurgie Fse Inst Rech Avoiding casting hole blockages - by passing an oxidising agent through the casting hole wall
FR2169894A1 (de) * 1971-12-29 1973-09-14 Stoecker & Kunz Gmbh
US3773226A (en) * 1970-04-23 1973-11-20 Didier Werke Ag Container with sliding shutter for a liquid melt
DE2811546A1 (de) * 1977-03-18 1978-09-21 Sumitomo Metal Ind Verfahren und vorrichtung zum kontinuierlichen giessen von stahl

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB834234A (en) * 1955-09-19 1960-05-04 Patentverwertung Ag Process and device for the production of high-quality castings
US3773226A (en) * 1970-04-23 1973-11-20 Didier Werke Ag Container with sliding shutter for a liquid melt
FR2169894A1 (de) * 1971-12-29 1973-09-14 Stoecker & Kunz Gmbh
FR2167284A1 (en) * 1972-01-12 1973-08-24 Siderurgie Fse Inst Rech Avoiding casting hole blockages - by passing an oxidising agent through the casting hole wall
DE2811546A1 (de) * 1977-03-18 1978-09-21 Sumitomo Metal Ind Verfahren und vorrichtung zum kontinuierlichen giessen von stahl

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543576A1 (fr) * 1983-03-30 1984-10-05 Messer Griesheim Gmbh Procede et installation pour le balayage d'un bain de metal fondu notamment d'acier dans une poche de coulee ou analogue munie d'un bouchon d'obturation
WO1984004477A1 (en) * 1983-05-12 1984-11-22 James Menzies Thornton Composite refractory product
US4668554A (en) * 1983-05-12 1987-05-26 Thor Ceramics Limited Composite refractory product
FR2554024A1 (fr) * 1983-11-02 1985-05-03 Didier Werke Ag Busette de coulee a immersion
GB2148765A (en) * 1983-11-02 1985-06-05 Didier Werke Ag Immersion nozzle
EP0187924A1 (de) * 1984-11-26 1986-07-23 Cometus AG Verfahren zum Spülen von Metallschmelze und Pfanne zur Durchführung des Verfahrens
GB2173726A (en) * 1985-04-11 1986-10-22 Stopinc Ag Metallurgical discharge sleeves
BE1000818A3 (fr) * 1986-11-13 1989-04-11 Shinagawa Refractories Co Ajutage pour verser du metal fondu.
US5072779A (en) * 1987-09-07 1991-12-17 Danieli & C. Officine Meccaniche Spa Continuous casting machine of a reduced height with immersed teeming nozzle
US5016788A (en) * 1988-02-26 1991-05-21 Vesuvius Crucible Company Pouring spout for servo-assisted opening, device incorporating it and implementation process
EP0332483A1 (de) * 1988-02-26 1989-09-13 Vesuvius France S.A. Ausgussdüse zur unterstützenden Oeffnung,Vorrichtung,die sie beinhaltet,und Verfahren zur Durchführung
FR2627715A1 (fr) * 1988-02-26 1989-09-01 Vesuvius Sa Busette de coulee pour ouverture assistee, dispositif l'incorporant et procede de mise en oeuvre
FR2681270A3 (en) * 1991-09-18 1993-03-19 Irsid Nozzle for the continuous casting of liquid metal, particularly steel
FR2683753A1 (fr) * 1991-11-19 1993-05-21 Stopinc Ag Plaque d'obturateur pour un obturateur a tiroir d'une cuve contenant un bain de metal en fusion.
WO2002047846A2 (en) * 2000-12-11 2002-06-20 Vesuvius Crucible Company Casting nozzle with gas injection means
WO2002047846A3 (en) * 2000-12-11 2003-03-06 Vesuvius Crucible Co Casting nozzle with gas injection means
EP3097997A1 (de) * 2015-05-28 2016-11-30 Sheffield Hi-Tech Refractories Germany GmbH Stopfen in einem zusammenwirken mit einer bodenausgussdüse in einem metallurgischen gefäss
JP2021049564A (ja) * 2019-09-26 2021-04-01 黒崎播磨株式会社 タンディッシュ上ノズル構造体及び連続鋳造方法
WO2021060122A1 (ja) * 2019-09-26 2021-04-01 黒崎播磨株式会社 タンディッシュ上ノズル構造体及び連続鋳造方法
CN114040823A (zh) * 2019-09-26 2022-02-11 黑崎播磨株式会社 浇口盘上喷嘴结构体及连续铸造方法
TWI770616B (zh) * 2019-09-26 2022-07-11 日商黑崎播磨股份有限公司 鋼液分配器上噴嘴結構體及連續鑄造方法
WO2023047153A1 (en) * 2021-09-24 2023-03-30 Arcelormittal Leak-proof upper tundish nozzle

Also Published As

Publication number Publication date
DE3168852D1 (en) 1985-03-28
EP0059805B1 (de) 1985-02-13

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