EP0198123A1 - Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens - Google Patents

Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens Download PDF

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Publication number
EP0198123A1
EP0198123A1 EP85200556A EP85200556A EP0198123A1 EP 0198123 A1 EP0198123 A1 EP 0198123A1 EP 85200556 A EP85200556 A EP 85200556A EP 85200556 A EP85200556 A EP 85200556A EP 0198123 A1 EP0198123 A1 EP 0198123A1
Authority
EP
European Patent Office
Prior art keywords
seal
sheet
nozzle
space
canals
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.)
Withdrawn
Application number
EP85200556A
Other languages
English (en)
French (fr)
Inventor
Philippe Mutsaarts
Pierre Patte
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.)
Belge Des Produits Refractaires En Abrege "belref" Ste
Original Assignee
Belge Des Produits Refractaires En Abrege "belref" Ste
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 Belge Des Produits Refractaires En Abrege "belref" Ste filed Critical Belge Des Produits Refractaires En Abrege "belref" Ste
Priority to EP85200556A priority Critical patent/EP0198123A1/de
Publication of EP0198123A1 publication Critical patent/EP0198123A1/de
Withdrawn legal-status Critical Current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
    • B22D41/502—Connection arrangements; Sealing means therefor

Definitions

  • the present invention relates to a method for making airtight a space existing between a container and a metallurgical pipe, such as space between, on the one hand, the intermediate external nozzle of a closure device ensuring control liquid metal casting either from a steelworks ladle, or from a continuous casting distributor, and, on the other hand, a pipe such as a long nozzle or a submerged nozzle.
  • Metallurgical vessels in particular steelworks pouring ladles and continuous casting distributors, are fitted with an internal or external closing device which controls the pouring of liquid metal and which is generally filled with a material refractory channeling said liquid metal, allowing either to adjust the speed of casting, or to stop the casting.
  • These closing devices comprise an intermediate external nozzle through which the liquid metal flows and whose length varies between 100 and 500 mm and whose shape is generally substantially cylindrical.
  • the molten metal is channeled from the free end of the intermediate external nozzle.
  • a nozzle which is called “long nozzle” when it is disposed between the ladle and the continuous casting distributor, "immersed nozzle” when it is mounted between the continuous casting distributor and the false ingot mold .
  • the known manner also has the disadvantage that, during casting, the liquid metal deteriorates the nozzles at the location of the seal and particularly in the case where the intermediate external nozzle is coated with a metal jacket, the liquid metal attacks this coating, so that generally the intermediate external nozzle and long or submerged nozzle must be replaced after each pouring, which requires in particular the long and tedious disassembly of the aforementioned closing device.
  • the object of the invention is to remedy these drawbacks and to provide a method making it possible to seal the abovementioned seal simply and reliably, which has the advantage, on the one hand, of allowing the use of the same nozzles for several castings, which appreciably reduces operating costs and, on the other hand, allows a significant or total reduction in the consumption of neutral gas to render the environment of the seal inert, which also contributes to lowering, notably, said operating costs.
  • a carbon gasket is used which is in the form of a sheet, this gasket being advantageously cut flat and shaped either manually or by stamping.
  • the above sheet is reinforced, the frame being for example a metallic frame, such as a stainless steel frame.
  • pure crystalline graphite fibers are used as carbon.
  • the invention also relates to metallurgical vessels and pipes, the seal of which is made leaktight by the above method.
  • the process according to the invention and illustrated in the drawings is intended to make airtight the spaces 1 existing between, on the one hand, the intermediate external nozzles 2, made of refractory material, closing devices 3 ensuring the control of the pouring of liquid air from a steelworks ladle 4 and a continuous casting distributor 5 and, on the other hand, the immersed nozzles 6, made of refractory material, connected to the intermediate external nozzles 2, and coated ( Figure 1) or not ( Figure 2 ) of sheet metal shirts 7.
  • the spaces 1 are closed using a carbon joint 8, which is in the form of a sheet made from fibers of pure crystalline graphite.
  • This seal 8 which has a very good air tightness, is easily compressible so that it can marry all the irregularities of the nozzles 2 and 6 at the location of the fittings and thus ensure an excellent seal of the seal.
  • carbon has the advantage of being very refractory (up to about 2500 ° C), withstands very well the attack of liquid steel (1500 to 1650 ° C) and the high temperature environment , which provides excellent resistance over time to the gasket 8.
  • the carbon offers good mechanical strength, so that the gasket 8, on the one hand, is little affected by the mechanical shocks and vibrations occurring during handling and when using the nozzles 2 and 6 and, on the other hand, therefore, keeps well and keeps good stability during casting.
  • the thermal conductivity of the carbon gasket 8 is high, which favors the evacuation of calories to the cooler areas than that of the gasket, which has the effect of cooling the nozzles 2 and 6 at the place of their connection and of cause solidification of the liquid steel before it infiltrates into the spaces l, which is generally the case when the latter are clogged according to known methods.
  • This feature of the seal 8 offers the advantage of slowing down the deterioration of the surfaces in contact at the location of the connector and in particular the deterioration of the metal jacket 7, in the case where the latter is provided, of the intermediate external nozzle 2, this which recycles the nozzles 2 and 6 for several flows while retaining a good seal.
  • the carbon constituting the aforementioned joint 8 is not very wettable by liquid air, which avoids, unlike known techniques, bonding between the nozzles 2 and 6, so that these can be separated extremely easily at the end of the process. use of said nozzles and when replacing them.
  • seal 8 having regard to its aforementioned qualities, therefore makes it possible to significantly reduce and even to eliminate the aforesaid injection of neutral gas in the areas of the fittings.
  • the seal 8 can be used both for a connection as illustrated in FIG. 1, namely a connection whose surfaces are in the form of a truncated cone, as for a connection shown in FIG. 2 and whose surfaces are horizontal and joined by a truncated cone-shaped surface.
  • the sheet used to make the seal 8 advantageously has a thickness of between 0.5 and 5 mm.
  • the joint illustrated in Figure 1 is cut flat in this sheet and it is deformed manually to give it the appropriate shape. It can either be placed freely at the location of the connection of the nozzles 2 and 6, or stuck on one or the other of the nozzles.
  • the seal 8, illustrated in FIG. 2 is also cut flat in the sheet and then stamped to give it its shape.
  • the carbon sheet can be used as it is, but a sheet reinforced with a metallic frame, such as a frame made of stainless steel, is advantageously used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP85200556A 1985-04-11 1985-04-11 Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens Withdrawn EP0198123A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP85200556A EP0198123A1 (de) 1985-04-11 1985-04-11 Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85200556A EP0198123A1 (de) 1985-04-11 1985-04-11 Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens

Publications (1)

Publication Number Publication Date
EP0198123A1 true EP0198123A1 (de) 1986-10-22

Family

ID=8194007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200556A Withdrawn EP0198123A1 (de) 1985-04-11 1985-04-11 Verfahren zum Abdichten von Verbindungsleitungen für flüssiges Metall und Leitungen, abgedichtet unter Anwendung dieses Verfahrens

Country Status (1)

Country Link
EP (1) EP0198123A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282247A1 (de) * 1987-03-06 1988-09-14 Thor Ceramics Limited Feuerfester Zusammenbau
FR2635283A1 (fr) * 1988-08-11 1990-02-16 Flo Con Syst Joint de tube protecteur pour la coulee de metaux en fusion
FR2684577A1 (fr) * 1991-12-04 1993-06-11 Daussan & Co Tube de coulee a manchon refractaire.
US5348202A (en) * 1987-02-28 1994-09-20 Thor Ceramics Limited Tubular refractory product
US5866022A (en) * 1997-03-24 1999-02-02 North American Refractories Company Refractory pour tube with cast plate
EP1199121A1 (de) * 2000-10-20 2002-04-24 SMS Demag AG Vorrichtung zum Führen der Strömung einer metallurgischen Schmelze, insbesondere einer Stahlschmelze
WO2016113196A1 (en) * 2015-01-12 2016-07-21 Vesuvius Crucible Company Casting nozzle with external resilient gasket
CN111922310A (zh) * 2020-07-23 2020-11-13 宝武集团马钢轨交材料科技有限公司 一种连铸钢包长水口氩封在线动态控制装置及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877675A (en) * 1974-02-13 1975-04-15 James T Shapland Seal construction and method of forming seal between two abutting surfaces
US4165026A (en) * 1971-12-07 1979-08-21 Foseco Trading A.G. Tundish with expendable lining and easily removable nozzle
US4177943A (en) * 1977-07-06 1979-12-11 Daishin Kako Co., Ltd. Refractory releasing agent
DE2919880A1 (de) * 1979-05-17 1980-11-27 Didier Werke Ag Giessrohr

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165026A (en) * 1971-12-07 1979-08-21 Foseco Trading A.G. Tundish with expendable lining and easily removable nozzle
US3877675A (en) * 1974-02-13 1975-04-15 James T Shapland Seal construction and method of forming seal between two abutting surfaces
US4177943A (en) * 1977-07-06 1979-12-11 Daishin Kako Co., Ltd. Refractory releasing agent
DE2919880A1 (de) * 1979-05-17 1980-11-27 Didier Werke Ag Giessrohr

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348202A (en) * 1987-02-28 1994-09-20 Thor Ceramics Limited Tubular refractory product
EP0282247A1 (de) * 1987-03-06 1988-09-14 Thor Ceramics Limited Feuerfester Zusammenbau
FR2635283A1 (fr) * 1988-08-11 1990-02-16 Flo Con Syst Joint de tube protecteur pour la coulee de metaux en fusion
FR2684577A1 (fr) * 1991-12-04 1993-06-11 Daussan & Co Tube de coulee a manchon refractaire.
US5866022A (en) * 1997-03-24 1999-02-02 North American Refractories Company Refractory pour tube with cast plate
EP1199121A1 (de) * 2000-10-20 2002-04-24 SMS Demag AG Vorrichtung zum Führen der Strömung einer metallurgischen Schmelze, insbesondere einer Stahlschmelze
WO2016113196A1 (en) * 2015-01-12 2016-07-21 Vesuvius Crucible Company Casting nozzle with external resilient gasket
CN111922310A (zh) * 2020-07-23 2020-11-13 宝武集团马钢轨交材料科技有限公司 一种连铸钢包长水口氩封在线动态控制装置及方法

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