EP0171589B1 - Busette collectrice dans un dispositif pour contrôler l'écoulement de l'acier liquide sortant d'une poche de coulée ou d'un panier intermédiaire - Google Patents

Busette collectrice dans un dispositif pour contrôler l'écoulement de l'acier liquide sortant d'une poche de coulée ou d'un panier intermédiaire Download PDF

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Publication number
EP0171589B1
EP0171589B1 EP85108394A EP85108394A EP0171589B1 EP 0171589 B1 EP0171589 B1 EP 0171589B1 EP 85108394 A EP85108394 A EP 85108394A EP 85108394 A EP85108394 A EP 85108394A EP 0171589 B1 EP0171589 B1 EP 0171589B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
inert gas
hole
insert
outflow
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
Application number
EP85108394A
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German (de)
English (en)
Other versions
EP0171589A1 (fr
Inventor
Hans Hoffgen
Giorgio Cappelli
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.)
RADEX ITALIANA SpA
Original Assignee
RADEX ITALIANA SpA
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Filing date
Publication date
Application filed by RADEX ITALIANA SpA filed Critical RADEX ITALIANA SpA
Priority to AT85108394T priority Critical patent/ATE33952T1/de
Publication of EP0171589A1 publication Critical patent/EP0171589A1/fr
Application granted granted Critical
Publication of EP0171589B1 publication Critical patent/EP0171589B1/fr
Expired 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
    • B22D41/58—Pouring-nozzles with gas injecting means
    • 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

Definitions

  • This present invention concerns a collector nozzle in a divice for controlling the outflow of cast steel from a ladle or from a tundish according to the preamble of claim 1 or claim 2, respectively.
  • the steel flow is protected by a pipe along its length between exit from the nozzle and entry into the mold or into the tundish.
  • the collector nozzle for a ladle is the nozzle in a mobile part of a slide gate valve; consequently in most cases, but not necessarily, the collector nozzle is made of refractory material known in this technical field, and hereinafter it will simply be called the nozzle.
  • the GB-A-2 094 454 shows a union block, between the lower end of the collector nozzle and the upper end of the protecting tube, for leading compressed air from a source of compressed air to an annular orifice open in the lower part of the union block, through a gas manifold surrounding the union block.
  • a unitary nozzle component having a manifold space and orifices at its downstream end is provided.
  • the FR-A-2 252 157 shows a nozzle made of permeable, porous material comprising a part connecting an external duct carrying inert gas from a source of inert gas under pressure with a space inside said nozzle into which the gas penetrates and spreads through the pores in the nozzle emerging through the wall of the hole for outflow of steel.
  • Direct porosity is a conventional term indicating that certain techniques have been used to create, in a non-porous body, small ducts lying in one or more desired directions, while random porosity indicates the porosity existing throughout the whole of a refractory porous body where the pores lie in all possible directions.
  • the techniques used to create direct porosity in a piece of material are explained in the European patent publication No 0083919 in the name of ODDisch - Amerikanische Magnesit Aktien.
  • the nozzle in order to carry the inert gas into the desired area, the nozzle is made so as to indicate the necessary ducts; in the second case, to carry the inert gas to the desired area, use will be made of porous materials, or sections of materials, mounted in the mass of refractory material forming the nozzle.
  • a randomly-porous nozzle incorporates at least one main duct passing round the nozzle hole for outflow of the steel connected with a source of inert gas and with a plurality of secondary ducts leading to the lower end of the nozzle for delivering inert gas at the top of a downstream located protector pipe and a second plurality of secondary ducts connecting each of said main ducts with said hole for delivering into said hole said gas providing a protective gas jacket.
  • the nozzle comprises a conecting part between each of the above main ducts and an external duct carrying inert gas from a source of inert gas under pressure and comprises devices for controlling entry and pressure of the inert gas.
  • the nozzle may comprise a first main duct and a first plurality of secondary ducts connecting the first main duct with the above hole, and comprises a second main duct and a further second plurality of secondary ducts connecting the second main duct with the environment outside the nozzle at the latter's lower end.
  • the nozzle comprises two parts for connection to said external duct, one for each main duct, and two devices for controlling entry and pressure of the inert gas, one for each main duct.
  • a nozzle is made of non-porous material comprising an insert of randomly-porous material in the form of a circular crown coaxial with the longitudinal axis of the hole for outflow of steel, in the desired position along said longitudinal axis, a part connecting an external duct carrying inert gas from a source of inert gas under pressure there being a space inside said insert of randomly-porous material and a cavity, all round the lower portion of the nozzle, in which there is a circular aperture at the level of the lower horizontal wall of the nozzle for connecting the cavity with the environment outside the nozzle and comprises a part connecting the cavity with the above external duct, the purpose of all this being to produce a flow of inert gas inside a part of said hole through the inner wall of said insert and a flow of inert gas at the lower end of the nozzle.
  • the lower end of the nozzle made of non-porous material is formed of an insert of randomly-porous material and the above cavity is closed at the bottom as well as at the top so that inert gas also flows through the entire lower end of the nozzle.
  • the nozzle conforming to this present invention allows inert gas flowing through said nozzle under pressure to reach the area outside the nozzle where said nozzle fits into the protection pipe thus creating in that area overpressure of inert gas that prevents entry of air through the fissures where the mouth of the nozzle enters the protection pipe and allows inert gas flowing under pressure through said nozzle to enter the hole in the nozzle in the area of said hole where deposits would form, to prevent their formation.
  • Fig. 1 shows part of a ladle slide gate valve 1 comprising a nozzle 2 held withion a metal frame 3 with an interposed layer of suitable cement 4, and a hole 5 for outflow of steel from a ladle.
  • the lower end of the nozzle 2 fits into a pipe 6 placed to protect the cast steel and incorporates a main ringwise duct 7 that is taken outside the nozzle through a segment of tube 8 connected to the duct 9 carrying argon under pressure from a source 10.
  • Duct 9 is opened and closed and gas pressure regulated by a control device 11.
  • a plurality of secondary ducts 12, 13 lead off from the main duct 7.
  • Ducts 12 connect duct 7 with the area of the hole 5, where deposits form, and ducts 13 connect duct 7 with the outside of the nozzle at the top of protection tube 6.
  • the exit to ducts 13 is in the lower horizontal wall of the nozzle so that the argon is blown into the spaces 14 bounded by the nozzle's outer wall, by the inner wall of the protection tube 6 and by the wall enclosing the cast steel 15.
  • Fig. 2 shows a nozzle 22 of non-porous refractory material comprising: an insert 40 of randomly-porous refractory material in the form of a circular crown placed in the area of the hole for outflow of steel where the aluminium oxides create deposits, insert 40 comprising a space 41 that functions as a collector of the argon brought in under pressure along the duct 29 that passes through the body of the nozzle and opens into said space; a cavity 42, formed between a steel liner 43 and the outer steel frame 44 of the nozzle closed at the top and having a circular aperture 45 at the level of the horizontal lower wall of the nozzle.
  • Duct 29 has a branch 29A that penetrates into the cavity 42 and comprises an aperture 46 through which the argon enters.
  • insert 40 through the pores of its material the gas under pressure enters the hole 47, entry of gas being conventionally indicated by the arrows F1; the non-porous material adjacent to faces A, B, C, of the insert prevents the gas from spreading into the body of the nozzle.
  • cavity 42 gas under pressure arrives through aperture 45 in the region 48 bounded by the internal wall of the protection pipe 26, by the lower end of the nozzle 22 and by the surface of the cast steel, not shown in the figure, thus creating overpressure in this region that prevents air from entering through the fissure 49, entry of gas being conventionally indicated by the arrows F2.
  • Fig. 3 shows a nozzle 32 made of non-porous refractory material comprising an insert 40 of randomly-porous refractory material and a duct 29 having a branch 29A and a cavity 42 exactly the same as the corresponding parts illustrated in Fig. 2, except that the cavity 42 is completely closed round the frame 44 and at the lower end of the nozzle 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (3)

1. Buse collectrice (2) appartenant à un dispositif destiné à commander l'écoulement de l'acier coulé d'une pouche ou d'un bassin de coulée, qui s'emboite en aval dans un tube protecteur (6) et est reliée à une source séparée (10) de gaz inerte sous pression, cette buse comprenant au moins un conduit principale (7) qui encercle la lumière (5) de la buse prévue pour la sortie de l'acier et est relié à ladite source de gaz inerte et à un jeu de conduits secondaires (13) qui aboutissent à l'extrémité inférieure de la buse pour débiter ledit gaz à la partie haute du tube protecteur (6), caractérisée par le fait que le corps de la buse est un corps (2) à porosité aléatoire qui présente en outre un jeu supplémentaire de conduits secondaires (12) qui relient ledit conduit principal (7) à ladite lumière (5) pour débiter ledit gaz dans ladite lumière afin de former une chemise de gaz protecteur pour au moins une partie de la surface de ladite lumière (5).
2. Buse collectrice (22) faite d'une matière non poreuse et destinée à commander l'écoulement de l'acier coulé d'une pouche ou d'un bassin de coulée et qui s'emboite en aval dans un tube protecteur (26), cette buse ayant une partie qui relie un conduit extérieur (29) à une source séparée de gaz inerte sous pression, présentant tout autour de sa propre partie inférieure une cavité (42) qui présente une ouverture circulaire située au niveau de la paroi horizontale inférieure de la buse, et comprenant une partie qui relie ladite cavité (42) audit conduit extérieur (29) pour débiter un flux de gaz inerte dans la région (48) située à l'extérieur de ladite buse à la partie haute dudit tube protecteur, caractérisée par le fait qu'elle comrpend une insertion (40) en matière à porosité aléatoire présentant la forme d'une couronne circulaire coaxiale à l'axe longitudinal de la lumière (47) pour débiter l'acier au point désiré de la longueur dudit axe longitudinal, un espace (41) qui est situé à l'intérieur de ladite insertion (40) étant relié à ladite source de gaz inerte par ledit conduit extérieur (29) afin de débiter un flux de gaz inerte à l'intérieur d'une partie de ladite lumière (47) à travers la paroi intérieure de ladite insertion.
3. Buse collectrice (32) selon la revendication 2, caractérisée par le fait que l'extrémité inférieure de la buse présente la forme d'une insertion (50) en matière à porosité aléatoire et par le fait que ladite cavité (42) est fermée en bas, en obligeant ainsi le gaz inerte à s'écouler à travers la paroi cylindrique intérieure de l'insertion pour déboucher à l'intérieure de ladite lumière (47) et à travers la paroi horizontale inférieure de l'insertion (50) pour déboucher dans la région (48) située à l'extérieur de ladite buse à la partie haute du tube protecteur (26).
EP85108394A 1984-07-18 1985-07-06 Busette collectrice dans un dispositif pour contrôler l'écoulement de l'acier liquide sortant d'une poche de coulée ou d'un panier intermédiaire Expired EP0171589B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108394T ATE33952T1 (de) 1984-07-18 1985-07-06 Sammlerausguss in einer vorrichtung zum kontrollieren des ausflusses von fluessigem stahl aus einer pfanne oder eines zwischengefaesses.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21948/84A IT1176428B (it) 1984-07-18 1984-07-18 Manicotto di uscita in un dispositivo per controllare l'efflusso di acciaio fuso da una siviera o da una paniera
IT2194884 1984-07-18

Publications (2)

Publication Number Publication Date
EP0171589A1 EP0171589A1 (fr) 1986-02-19
EP0171589B1 true EP0171589B1 (fr) 1988-05-04

Family

ID=11189255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108394A Expired EP0171589B1 (fr) 1984-07-18 1985-07-06 Busette collectrice dans un dispositif pour contrôler l'écoulement de l'acier liquide sortant d'une poche de coulée ou d'un panier intermédiaire

Country Status (5)

Country Link
EP (1) EP0171589B1 (fr)
JP (1) JPS6133745A (fr)
AT (1) ATE33952T1 (fr)
DE (1) DE3562461D1 (fr)
IT (1) IT1176428B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179573A (en) * 1985-08-29 1987-03-11 British Steel Corp Metal-pouring equipment modified for protective gas injection
EP0293564A2 (fr) * 1987-06-05 1988-12-07 Stopinc Aktiengesellschaft Dispositif pour l'introduction de gas de balayage dans un orifice de coulée avec une busette à tiroir pour récipients métallurgiques
BE1000818A3 (fr) * 1986-11-13 1989-04-11 Shinagawa Refractories Co Ajutage pour verser du metal fondu.
FR2639267A1 (fr) * 1988-11-23 1990-05-25 Clecim Sa Procede et ensemble d'alimentation en metal fondu de la lingotiere d'une installation de coulee continue d'ebauches minces
EP0373555A2 (fr) * 1988-12-14 1990-06-20 NUOVA SIRMA S.p.A. Procédés et installations pour la coulée continue de métaux
EP0385617A1 (fr) * 1989-02-17 1990-09-05 The Carborundum Company Procédé et dispositif d'insufflation de gaz dans les métaux fondus
US5613545A (en) * 1991-11-12 1997-03-25 Shinagawa Refractories Co. Ltd. Inert gas injecting plate brick or insert nozzle brick for use in a sliding gate valve apparatus of molten metal
GB2313076A (en) * 1996-05-17 1997-11-19 Akechi Ceramics Kk Long nozzle with gas passages for continuous casting
WO2000029147A1 (fr) * 1998-11-13 2000-05-25 Messer Austria Gmbh Procede et dispositif de regulation de jet de coulee
WO2001083138A1 (fr) * 2000-04-28 2001-11-08 Vesuvius Crucible Company Composant refractaire et ensemble pourvu d'un systeme d'etancheite perfectionne servant a l'injection d'un gaz inerte
US6450376B1 (en) 1996-10-17 2002-09-17 Vesuvius Crucible Company Refractory assemblies

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3624320A1 (de) * 1986-07-18 1988-01-28 Dahlhoff Friedrich Wilhelm Abdichtung fuer giesseinrichtungen mittels schutzgaszufuehrung
JPH0342351U (fr) * 1989-08-29 1991-04-22
JPH03126273U (fr) * 1990-03-28 1991-12-19
AU687345B2 (en) * 1992-06-18 1998-02-26 Shinagawa Refractories Co., Ltd. Refractory block for continuous casting
FR2757431B1 (fr) * 1996-12-20 1999-02-12 Vesuvius France Sa Installation de transfert de metal liquide, procede de mise en oeuvre, et refractaires
CN103350222A (zh) * 2013-07-12 2013-10-16 抚顺特殊钢股份有限公司 新型模铸氩气保护装置
CN108127110B (zh) * 2017-02-28 2023-06-09 安徽工业大学 一种可保护出钢的钢水转运装置及可保护出钢的电炉炼钢系统
ES2936869T3 (es) * 2017-06-20 2023-03-22 Krosakiharima Corp Boquilla de colada
CN112404377A (zh) * 2020-11-20 2021-02-26 二重（德阳）重型装备有限公司 钢水底注中注管组件及其浇注方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1492533A (en) * 1973-11-23 1977-11-23 Flogates Ltd Pouring of metals
DE2517834A1 (de) * 1975-04-22 1976-11-04 Linde Ag Stranggiessanlage
FR2490123A1 (fr) * 1980-09-15 1982-03-19 Air Liquide Dispositif obturateur a plaques pour trous de coulee de recipient contenant un metal en fusion
GB2094454B (en) * 1981-03-03 1984-09-19 Flogates Ltd Improvements in the pouring of molten metals

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179573A (en) * 1985-08-29 1987-03-11 British Steel Corp Metal-pouring equipment modified for protective gas injection
BE1000818A3 (fr) * 1986-11-13 1989-04-11 Shinagawa Refractories Co Ajutage pour verser du metal fondu.
EP0293564A2 (fr) * 1987-06-05 1988-12-07 Stopinc Aktiengesellschaft Dispositif pour l'introduction de gas de balayage dans un orifice de coulée avec une busette à tiroir pour récipients métallurgiques
EP0293564A3 (en) * 1987-06-05 1989-10-11 Stopinc Aktiengesellschaft Method for feeding flushing gas into a discharge hole with a slide gate nozzle for metallurgical vessels
US5174360A (en) * 1988-11-23 1992-12-29 Institut De Recherches De La Siderurgie Francaise Process and assembly for feeding molten metal to the ingot mold of an installation for the continuous casting of thin cogs
EP0370934A1 (fr) * 1988-11-23 1990-05-30 Institut De Recherches De La Siderurgie Francaise (Irsid) Procédé et ensemble d'alimentation en métal fondu de la lingotière d'une installation de coulée continue d'ébauches minces
FR2639267A1 (fr) * 1988-11-23 1990-05-25 Clecim Sa Procede et ensemble d'alimentation en metal fondu de la lingotiere d'une installation de coulee continue d'ebauches minces
EP0373555A2 (fr) * 1988-12-14 1990-06-20 NUOVA SIRMA S.p.A. Procédés et installations pour la coulée continue de métaux
EP0373555A3 (fr) * 1988-12-14 1991-11-21 NUOVA SIRMA S.p.A. Procédés et installations pour la coulée continue de métaux
EP0385617A1 (fr) * 1989-02-17 1990-09-05 The Carborundum Company Procédé et dispositif d'insufflation de gaz dans les métaux fondus
US5613545A (en) * 1991-11-12 1997-03-25 Shinagawa Refractories Co. Ltd. Inert gas injecting plate brick or insert nozzle brick for use in a sliding gate valve apparatus of molten metal
GB2313076A (en) * 1996-05-17 1997-11-19 Akechi Ceramics Kk Long nozzle with gas passages for continuous casting
US6450376B1 (en) 1996-10-17 2002-09-17 Vesuvius Crucible Company Refractory assemblies
WO2000029147A1 (fr) * 1998-11-13 2000-05-25 Messer Austria Gmbh Procede et dispositif de regulation de jet de coulee
WO2001083138A1 (fr) * 2000-04-28 2001-11-08 Vesuvius Crucible Company Composant refractaire et ensemble pourvu d'un systeme d'etancheite perfectionne servant a l'injection d'un gaz inerte

Also Published As

Publication number Publication date
ATE33952T1 (de) 1988-05-15
EP0171589A1 (fr) 1986-02-19
JPS6133745A (ja) 1986-02-17
IT1176428B (it) 1987-08-18
DE3562461D1 (en) 1988-06-09
IT8421948A0 (it) 1984-07-18

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