EP0171589A1 - 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
EP0171589A1
EP0171589A1 EP85108394A EP85108394A EP0171589A1 EP 0171589 A1 EP0171589 A1 EP 0171589A1 EP 85108394 A EP85108394 A EP 85108394A EP 85108394 A EP85108394 A EP 85108394A EP 0171589 A1 EP0171589 A1 EP 0171589A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
inert gas
outflow
controlling
ladle
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
EP85108394A
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German (de)
English (en)
Other versions
EP0171589B1 (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
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 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 device for controlling the outflow of cast steel from a ladle or from a tundish.
  • the steel flow is protected by a pipe along its length beetween 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 nozzle When aluminium steels are being cast, and the nozzle is made of refractory material, it happens that the aluminium contained in the steel becomes deposited in the form of oxides on the refractory sides of the hole of the nozzle to a point where the hole through which the steel passes is completely choked. The problem therefore exists of how to prevent formation of aluminium oxides in the hole of the nozzle of a ladle or of a tundish.
  • This present invention solves all the above problems.
  • 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.
  • Porosity of the refractory material used to make the nozzle may be direct or random.
  • 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 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 N° 0 083 919 in the name of ⁇ tschisch - Amerikanische Magnesit Aktien.
  • the nozzle in order to carry the inert gas into the desired area, the nozzle is made so as to incorporate 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 hole for outflow of the steel, between its own outer wall and the wall of the hole for outflow of steel, a first plurality of secondary ducts connecting each of the above main ducts with said hole, a second plurality of secondary ducts connecting each of said main ducts with the environment outside the nozzle at the latter's lower end.
  • the nozzle comprises a connecting 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 comprises 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 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.
  • Another nozzle is a nozzle 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.
  • Yet another nozzle is made of randomly-porous refractory material and comprises 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 inert gas penetrates and spreads through all the pores in the nozzle emerging at the wall of the hole for outflow of steel and at the horizontal wall at the lower end.
  • Fig.1 shows part of a ladle slide gate valve 1 comprising a nozzle 2 held within a metal frame 3 with an interposed layer of suitable cement 4, and aole 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 1 4 bounded by the nozzle's outer wall , by the inner wall of the protection tube 6 and by the wallienclosing 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 nozz 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.
  • the nozzle At the lower end of the nozzle there is an insert 50 of random ly-porous refractory material whose upper surface is adjacent to the non-porous material, the outer lateral surface being comprised within the cavity 42, the inner lateral surface form ing the terminating portion of the hole 47 and the lower surface opening into the region 48 bounded as already described with reference to Fig.2. It is therefore clear that the gas passing through duct 29 will penetrate through the insert 40 into the hole 47, as already described with reference to Fig.2, and will penetrate through the insert 50 partly in the terminating portion of hole 47, overcoming the pressure of the steel, and partly in said region 48 where entry of gas is conventionally indicated by the arrows F2.
  • Fig.4 shows the lower part of a tundish 60 and a nozzle 61 made of non-porous refractory material in one of the casting holes, comprising: an insert 62 of randomly-porous refractory material shaped like a circular crown in the area of the hole:for outflow of steel where deposits of aluminium oxide form, insert 62 which comprises a space 63 that functions as a collector of the argon brought in under pressure along the duct 64 that penetrates through the lower wall of the tundish and opens out into said space.
  • the argon under pressure reaches the hole 65 through the pores of the material of which the insert is made, entry of gas being conventionally indicated by the arrows F3.

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)
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
IT2194884 1984-07-18
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

Publications (2)

Publication Number Publication Date
EP0171589A1 true EP0171589A1 (fr) 1986-02-19
EP0171589B1 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 (7)

* 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
WO1998017420A1 (fr) * 1996-10-17 1998-04-30 Vesuvius Crucible Company Ensembles refractaires
FR2757431A1 (fr) * 1996-12-20 1998-06-26 Vesuvius France Sa Installation de transfert de metal liquide, procede de mise en oeuvre, et refractaires
GB2313076B (en) * 1996-05-17 1999-10-13 Akechi Ceramics Kk Long nozzle for continuous casting
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
CN108127110A (zh) * 2017-02-28 2018-06-08 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
CN110809499A (zh) * 2017-06-20 2020-02-18 黑崎播磨株式会社 铸造用喷嘴

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8521536D0 (en) * 1985-08-29 1985-10-02 British Steel Corp Molten metal teeming practice
US4756452A (en) * 1986-11-13 1988-07-12 Shinagawa Refractories Co., Ltd. Molten metal pouring nozzle
DE3718890C1 (de) * 1987-06-05 1988-03-31 Stopinc Ag Verfahren zum Einfuehren von Spuelgas in eine einen Schiebeverschluss aufweisende Ausgussoeffnung metallurgischer Gefaesse
FR2639267B1 (fr) * 1988-11-23 1991-02-22 Clecim Sa Procede et ensemble d'alimentation en metal fondu de la lingotiere d'une installation de coulee continue d'ebauches minces
IT1226006B (it) * 1988-12-14 1990-12-10 Sirma Nuova Perfezionamento nei processi e nei dispositivi di colata continua di metalli
IL93349A0 (en) * 1989-02-17 1990-11-29 Carborundum Co Method and apparatus for injecting gas into molten metal
JPH0342351U (fr) * 1989-08-29 1991-04-22
JPH03126273U (fr) * 1990-03-28 1991-12-19
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
AU687345B2 (en) * 1992-06-18 1998-02-26 Shinagawa Refractories Co., Ltd. Refractory block for continuous casting
DE19852289A1 (de) * 1998-11-13 2000-05-25 Messer Austria Gmbh Gumpoldski Verfahren und Einrichtung zur Regulierung von Gießstrahlen
AR028542A1 (es) * 2000-04-28 2003-05-14 Vesuvius Crucible Co Componente refractario y conjunto con obturacion hermetica para inyeccion de un gas inerte
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252157A1 (fr) * 1973-11-23 1975-06-20 Uss Eng & Consult
DE2517834A1 (de) * 1975-04-22 1976-11-04 Linde Ag Stranggiessanlage
EP0048641A1 (fr) * 1980-09-15 1982-03-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Protection d'un métal en fusion dans un obturateur à plaques
GB2094454A (en) * 1981-03-03 1982-09-15 Flogates Ltd Improvements in the pouring of molten metals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252157A1 (fr) * 1973-11-23 1975-06-20 Uss Eng & Consult
DE2517834A1 (de) * 1975-04-22 1976-11-04 Linde Ag Stranggiessanlage
EP0048641A1 (fr) * 1980-09-15 1982-03-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Protection d'un métal en fusion dans un obturateur à plaques
GB2094454A (en) * 1981-03-03 1982-09-15 Flogates Ltd Improvements in the pouring of molten metals

Cited By (13)

* 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
GB2313076B (en) * 1996-05-17 1999-10-13 Akechi Ceramics Kk Long nozzle for continuous casting
US6250520B1 (en) 1996-10-17 2001-06-26 Vesuvius Crucible Company Plant for transferring liquid metal, method of operation, and refractories
WO1998017420A1 (fr) * 1996-10-17 1998-04-30 Vesuvius Crucible Company Ensembles refractaires
WO1998017421A1 (fr) * 1996-10-17 1998-04-30 Vesuvius Crucible Company Installation de transfert de metal liquide, technique d'exploitation, et systemes refractaires
EA000604B1 (ru) * 1996-10-17 1999-12-29 Везувиус Крусибл Компани Огнеупорныйблок
EA000774B1 (ru) * 1996-10-17 2000-04-24 Везувиус Крусибл Компани Установка для перемещения жидкого металла и способ организации ее работы
FR2757431A1 (fr) * 1996-12-20 1998-06-26 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
CN108127110A (zh) * 2017-02-28 2018-06-08 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
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
CN110809499A (zh) * 2017-06-20 2020-02-18 黑崎播磨株式会社 铸造用喷嘴
CN110809499B (zh) * 2017-06-20 2022-01-11 黑崎播磨株式会社 铸造用喷嘴

Also Published As

Publication number Publication date
EP0171589B1 (fr) 1988-05-04
ATE33952T1 (de) 1988-05-15
IT1176428B (it) 1987-08-18
JPS6133745A (ja) 1986-02-17
DE3562461D1 (en) 1988-06-09
IT8421948A0 (it) 1984-07-18

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