USRE33036E - Closure mechanism with gas seal - Google Patents

Closure mechanism with gas seal Download PDF

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Publication number
USRE33036E
USRE33036E US07/125,605 US12560587A USRE33036E US RE33036 E USRE33036 E US RE33036E US 12560587 A US12560587 A US 12560587A US RE33036 E USRE33036 E US RE33036E
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United States
Prior art keywords
shielding tube
discharge nozzle
conical
improvement
ring
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Expired - Lifetime
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US07/125,605
Inventor
Bernhard Schiefer
Herbert Bumberger
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Voestalpine AG
Didier Werke AG
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Voestalpine AG
Didier Werke AG
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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
    • 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 closure mechanism of the type operable alternately for discharging molten metal from a molten metal containing vessel and for blocking such discharge, the closure mechanism being of the type including a conical discharge nozzle and a shielding tube fitted over a portion of the exterior of the discharge nozzle.
  • a molten metal for example a steel melt
  • a closure mechanism for example a stopper lock or a sliding gate closure unit
  • Closure mechanisms of this type include a lower discharge nozzle, for example attached to a sliding plate of a sliding plate closure unit.
  • a protective tube or shielding tube for the purpose, inter alia, of preventing the environmental atmosphere from oxidizing the discharged molten metal.
  • a conical snug fit or joint between the discharge nozzle and the shielding tube to ensure a reliable seal and to prevent the entrance of surrounding air.
  • this object is achieved in accordance with the present invention by the provision of a snug conical joint formed by closely complimentary conical surfaces of the discharge nozzle and the shielding tube. At least one ring-shaped seal is provided in this joint.
  • this ring-shaped seal comprises an annular recess formed in at least one of the conical surfaces of the discharge nozzle and the shielding tube.
  • Such recess defines an annular chamber which is filled with an inert gas.
  • the recess is formed in the shielding tube.
  • the recess may be formed to be of a uniform depth, or alternatively the recess may be wedge-shaped.
  • An inert gas connection opening may extend through the shielding tube and open into the annular chamber. Such connection opening may be connected to a supply source of the inert gas.
  • an additional ring-shaped seal of refractory fibrous material may be positioned between the discharge nozzle and the shielding tube.
  • the shielding tube may have therethrough a discharge passage defining with the conical surface of the shielding tube a step, and the ring-shaped seal formed of refractory fibrous material may be positioned between the step and the outer end of the discharge nozzle.
  • the discharge passage through the shielding tube may be an inner cylindrical surface of the shielding tube.
  • air is prevented from passing through the conical joint between the discharge nozzle and the shielding tube by the provision of the annular, inert gas seal.
  • the annular seal of inert gas still prevents exterior air from passing between the conical surfaces.
  • relatively little inert gas is consumed, since the shielding or protective gas flows only along actual leaks between the conical surfaces into the interior of the shielding tube. As long as these areas of leakage between the conical surfaces are leakproof, only a slight amount of inert gas will be consumed.
  • the annular chamber is of a simple construction, since only a single annular recess need be formed. Such recess may be formed in the outer conical surface of the discharge tube or in the inner conical surface of the shielding tube. However, advantageously the connection opening to the inert gas supply line always should be provided in the body of the shielding tube.
  • FIG. 1 is a cross-sectional view of the lower portion of a discharge nozzle and the upper portion of a shielding tube in accordance with one embodiment of the present invention
  • FIG. 2 is a view similar to FIG. 1, but of a second embodiment of the present invention.
  • FIG. 3 is a view similar to FIGS. 1 and 2, but of a third embodiment of the present invention.
  • Discharge nozzle 1 has therethrough a discharge opening 3, and discharge nozzle 1 has, at least on the lower portion thereof, an exterior conical surface 2.
  • a protective or shielding tube 4 has an upper portion 5 having an inner conical surface 6 joining a lower discharge passage which conventionally is cylindrical.
  • the conical surfaces 2 and 6 are closely complementary to define a tight or snug conical joint between elements 1 and 4.
  • the lower end of shielding tube 4 is not illustrated, but is intended to extend into an intermediate vessel or a continuous casting mold, as is known in the art.
  • At least one ring-shaped seal is provided in the joint between conical surfaces 2, 6.
  • such ring-shaped seal is defined by an annular chamber 8 formed by an annular recess formed in at least one of the conical surfaces 2, 6.
  • the recess is formed in the conical surface 6 of shielding tube 4, and such recess is a ring-shaped recess 10 of uniform depth.
  • An inert gas connection opening 9 passes through upper portion 5 of shielding tube 4. Opening 9 is adapted to be connected to an inert gas supply line and opens into annular chamber 8. Accordingly, annular chamber 8 is filled continually with inert gas.
  • the apparatus of FIG. 1 operates in the following manner.
  • molten metal passes through outlet opening 3 and enters the interior of shielding tube 4
  • a reduced pressure condition is created because of the cross-sectional expansion of the interior of shielding tube 4 with respect to the lower end 7 of discharge nozzle 1.
  • This has the tendency to cause external environmental air to be drawn inwardly along the conical joint, i.e. generally downwardly as shown in FIG. 1.
  • the ring-shaped seal formed by the inert gas filled annular chamber 8 prevents air from being drawn inwardly. This protects the metal discharge passing through shielding tube 4 from oxidation.
  • the shielding or protective inert gas supplied from opening 9 and into chamber 8 will be caused to flow inwardly only between those areas of the conical surfaces actually having leaks.
  • an effective purging of inert gas for example argon, can be achieved through the shielding tube 4 into the intermediate vessel to eliminate non-metal inclusions.
  • FIG. 1 shows relative dimensions of the location of the ring-shaped seal.
  • H 2 indicates the total length of the joint, i.e. the total length through which exterior environmental air would have to pass to reach the interior of shielding tube 4.
  • H 1 indicates that a substantial portion of the length H 2 is protected by the inert gas in annular chamber 8.
  • FIG. 2 is similar to the embodiment of FIG. 1, with the exception that the chamber 8 is defined by a wedge-shaped recess 11 formed in the inner conical surface 6 of the shielding tube 4. Recess 11 is somewhat easier to form that recess 10. Otherwise, the embodiment of FIG. 2 operates in the same manner, as the embodiment of FIG. 1.
  • shielding tube 4 has formed in the interior thereof a step 12 defined between conical surface 6 and the discharge passage of the shielding tube.
  • a ring-shaped seal 13 formed from a compressable ceramic refractory fibrous material is positioned on step 12, and the outer end 7 of discharge nozzle 1 rests on seal 13.
  • the embodiment of FIG. 3 operates substantially in the same manner as the embodiment of FIG. 1. Seal 13 improves sealing between the discharge nozzle and the shielding tube, i.e.
  • FIG. 3 shows the diameter of the discharge passage through shielding tube 4 being smaller than that of outlet opening of discharge nozzle 1. However, such diameters may be the same, since they are both cylindrical. Thereby, during the discharge of molten metal, the reduction in pressure will be less, such that the sealing requirements will be less stringent, as there will be less of a tendency for exterior air to be drawn into the interior of the shielding tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)

Abstract

A closure mechanism includes a conical discharge nozzle and a shielding tube fitted over the exterior of the discharge nozzle. A snug conical joint is formed by closely complementary conical surfaces of the discharge nozzle and the shielding tube. At least one ring-shaped seal is provided in such joint to prevent exterior air from entering between the discharge nozzle and the shielding tube into the interior of the shielding tube. The ring-shaped seal comprises an annular recess formed in one of the conical surfaces, thereby defining an annular chamber, and an inert gas filling such chamber.

Description

BACKGROUND OF THE INVENTION
The present invention relates to a closure mechanism of the type operable alternately for discharging molten metal from a molten metal containing vessel and for blocking such discharge, the closure mechanism being of the type including a conical discharge nozzle and a shielding tube fitted over a portion of the exterior of the discharge nozzle.
In molten metal containing vessels, such as casting ladles and tundishes, a molten metal, for example a steel melt, may be discharged through a closure mechanism, for example a stopper lock or a sliding gate closure unit, into an intermediate vessel or to a continuous casting mold assembly. Closure mechanisms of this type include a lower discharge nozzle, for example attached to a sliding plate of a sliding plate closure unit. To this discharge nozzle is attached a protective tube or shielding tube for the purpose, inter alia, of preventing the environmental atmosphere from oxidizing the discharged molten metal. Conventionally there is provided a conical snug fit or joint between the discharge nozzle and the shielding tube to ensure a reliable seal and to prevent the entrance of surrounding air. Nevertheless, unavoidably some air enters into the interior of the shielding tube along such conical joint. The result is that some of the molten metal passing through the shielding tube becomes oxidized, thereby deteriorating the degree of purity of the molten metal, for example steel.
In the past, various proposals have been advanced to attempt to overcome this problem. Thus, it has been attempted to place gas permeable inserts in the shielding tube beneath the discharge nozzle and to supply a shielding gas, such as an inert gas, to such insert. French Pat. No. 1,474,632 discloses a device in which a snug fit between the discharge nozzle and the protective tube is not required, and rather wherein an open boundary zone therebetween is filled with a protective or shielding gas. This solution however is complex structurally and requires a considerable consumption of the protective gas.
SUMMARY OF THE INVENTION
With the above discussion in mind, it is the object of the present invention to provide a closure mechanism structure of the type discussed above, but which is of a structure which prevents, with a high degree of accuracy, exterior air from entering into the interior of the shielding tube.
This object is achieved in accordance with the present invention by the provision of a snug conical joint formed by closely complimentary conical surfaces of the discharge nozzle and the shielding tube. At least one ring-shaped seal is provided in this joint. In accordance with a preferred arrangement of the present invention, this ring-shaped seal comprises an annular recess formed in at least one of the conical surfaces of the discharge nozzle and the shielding tube. Such recess defines an annular chamber which is filled with an inert gas. Preferably, the recess is formed in the shielding tube. The recess may be formed to be of a uniform depth, or alternatively the recess may be wedge-shaped. An inert gas connection opening may extend through the shielding tube and open into the annular chamber. Such connection opening may be connected to a supply source of the inert gas.
In accordance with a further embodiment of the present invention, an additional ring-shaped seal of refractory fibrous material may be positioned between the discharge nozzle and the shielding tube. Specifically, the shielding tube may have therethrough a discharge passage defining with the conical surface of the shielding tube a step, and the ring-shaped seal formed of refractory fibrous material may be positioned between the step and the outer end of the discharge nozzle. The discharge passage through the shielding tube may be an inner cylindrical surface of the shielding tube.
In accordance with the present invention, air is prevented from passing through the conical joint between the discharge nozzle and the shielding tube by the provision of the annular, inert gas seal. Particularly, after repeated uses of the shielding tube, such that the conical surfaces no longer are closely complementary, the annular seal of inert gas still prevents exterior air from passing between the conical surfaces. In accordance with the present invention, relatively little inert gas is consumed, since the shielding or protective gas flows only along actual leaks between the conical surfaces into the interior of the shielding tube. As long as these areas of leakage between the conical surfaces are leakproof, only a slight amount of inert gas will be consumed.
The annular chamber is of a simple construction, since only a single annular recess need be formed. Such recess may be formed in the outer conical surface of the discharge tube or in the inner conical surface of the shielding tube. However, advantageously the connection opening to the inert gas supply line always should be provided in the body of the shielding tube.
In the embodiment of the present invention employing a refractory fibrous ring-shaped seal between the outer end of the discharge nozzle and a step in the shielding tube, there are provided a number of advantages. Thus, there is provided an increased resistance to the entry therethrough to the interior of the shielding tube. Additionally, this arrangement prevents the buildup of solidified metal, thereby making it possible to use the shielding repeatedly without the necessity of burning out solidified metal. Burning out of solidified metal would chance damage to the annular recess formed in the conical surface of the shielding tube.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects, features and advantages of the present invention will be described in further detail below, with reference to the accompanying drawings, wherein:
FIG. 1 is a cross-sectional view of the lower portion of a discharge nozzle and the upper portion of a shielding tube in accordance with one embodiment of the present invention;
FIG. 2 is a view similar to FIG. 1, but of a second embodiment of the present invention; and
FIG. 3 is a view similar to FIGS. 1 and 2, but of a third embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
With reference to FIG. 1, there is shown the lower portion of a discharge nozzle 1 employable in a closure mechanism of the type operable alternately for discharging molten from a molten metal containing vessel and for blocking such discharge. The further structure of the closure mechanism is not shown, and it is intended that the present invention be employable with any known and conventional such closure mechanism structure. Discharge nozzle 1 has therethrough a discharge opening 3, and discharge nozzle 1 has, at least on the lower portion thereof, an exterior conical surface 2. A protective or shielding tube 4 has an upper portion 5 having an inner conical surface 6 joining a lower discharge passage which conventionally is cylindrical. The conical surfaces 2 and 6 are closely complementary to define a tight or snug conical joint between elements 1 and 4. The lower end of shielding tube 4 is not illustrated, but is intended to extend into an intermediate vessel or a continuous casting mold, as is known in the art.
At least one ring-shaped seal is provided in the joint between conical surfaces 2, 6. Specifically, such ring-shaped seal is defined by an annular chamber 8 formed by an annular recess formed in at least one of the conical surfaces 2, 6. In the arrangement illustrated, the recess is formed in the conical surface 6 of shielding tube 4, and such recess is a ring-shaped recess 10 of uniform depth. An inert gas connection opening 9 passes through upper portion 5 of shielding tube 4. Opening 9 is adapted to be connected to an inert gas supply line and opens into annular chamber 8. Accordingly, annular chamber 8 is filled continually with inert gas.
The apparatus of FIG. 1 operates in the following manner. Thus, when molten metal passes through outlet opening 3 and enters the interior of shielding tube 4, a reduced pressure condition is created because of the cross-sectional expansion of the interior of shielding tube 4 with respect to the lower end 7 of discharge nozzle 1. This has the tendency to cause external environmental air to be drawn inwardly along the conical joint, i.e. generally downwardly as shown in FIG. 1. However, the ring-shaped seal formed by the inert gas filled annular chamber 8 prevents air from being drawn inwardly. This protects the metal discharge passing through shielding tube 4 from oxidation.
If the joint between the conical surfaces 2, 6 is not entirely leakproof, which especially can happen after repeated uses of the shielding tube 4, the shielding or protective inert gas supplied from opening 9 and into chamber 8 will be caused to flow inwardly only between those areas of the conical surfaces actually having leaks. By increasing the supply pressure of the inert gas, an effective purging of inert gas, for example argon, can be achieved through the shielding tube 4 into the intermediate vessel to eliminate non-metal inclusions.
FIG. 1 shows relative dimensions of the location of the ring-shaped seal. Thus, H2 indicates the total length of the joint, i.e. the total length through which exterior environmental air would have to pass to reach the interior of shielding tube 4. H1 indicates that a substantial portion of the length H2 is protected by the inert gas in annular chamber 8.
The embodiment of FIG. 2 is similar to the embodiment of FIG. 1, with the exception that the chamber 8 is defined by a wedge-shaped recess 11 formed in the inner conical surface 6 of the shielding tube 4. Recess 11 is somewhat easier to form that recess 10. Otherwise, the embodiment of FIG. 2 operates in the same manner, as the embodiment of FIG. 1.
It also is possible in accordance with the present invention to provide an additional ring-shaped seal of a refractory fibrous material positioned between the discharge nozzle and the shielding tube. Such an arrangement is shown in the embodiment of FIG. 3. Thus, shielding tube 4 has formed in the interior thereof a step 12 defined between conical surface 6 and the discharge passage of the shielding tube. A ring-shaped seal 13 formed from a compressable ceramic refractory fibrous material is positioned on step 12, and the outer end 7 of discharge nozzle 1 rests on seal 13. Those of ordinary skill in the art will understand the type of materials which may be employed to form seal 13. The embodiment of FIG. 3 operates substantially in the same manner as the embodiment of FIG. 1. Seal 13 improves sealing between the discharge nozzle and the shielding tube, i.e. between annular chamber 8 and the interior of the shielding tube. If the shielding tube is used repeatedly, a new seal 13 can be inserted after each use. FIG. 3 shows the diameter of the discharge passage through shielding tube 4 being smaller than that of outlet opening of discharge nozzle 1. However, such diameters may be the same, since they are both cylindrical. Thereby, during the discharge of molten metal, the reduction in pressure will be less, such that the sealing requirements will be less stringent, as there will be less of a tendency for exterior air to be drawn into the interior of the shielding tube.
In the devices of the present invention, it is possible to achieve reliable sealing without the provision of gas permeable inserts in the annular chamber 8.
The present invention has been described and illustrated with regard to particularly preferred embodiments thereof. However, it is to be understood that various changes and modifications may be made to the specifically described and illustrated structure without departing from the scope of the present invention.

Claims (8)

We claim:
1. In a closure mechanism of the type operable alternately for discharging molten metal from a molten metal containing vessel and for blocking such discharge, said closure mechanism being of the type including a conical discharge nozzle and a shielding tube fitted over the exterior of said discharge nozzle, the improvement of means for preventing exterior air from entering between said discharge nozzle and said shielding tube into the interior of said shielding tube, said preventing means comprising:
a conical joint formed by conical surfaces of said discharge nozzle and said shielding tube, said conical surfaces of said discharge nozzle and said shielding tube being closely complementary .[.and in abutment.]. .Iadd.without an open space therebetween.Iaddend., thereby forming a snug said conical joint; and
at least one ring-shaped seal in said joint, said ring-shaped seal comprising an annular recess formed in one of said concial surfaces, thereby defining an annular chamber, and an inert gas filling said chamber.
2. The improvement claimed in claim 1, wherein said recess is formed in said shielding tube.
3. The improvement claimed in claim 1, wherein said recess is formed in said one conical surface to a uniform depth.
4. The improvement claimed in claim 1, wherein said recess is wedge-shaped.
5. The improvement claimed in claim 1, further comprising an inert gas connection opening extending through said shielding tube and opening into said chamber.
6. The improvement claimed in claim 1, further comprising a second ring-shaped seal of refractory fibrous material positioned between said discharge nozzle and said shielding tube.
7. The improvement claimed in claim 6, wherein said shielding tube has therethrough a discharge passage defining with said conical surface tube a step, and said second ring-shaped seal is positioned between said step and the outer end of said discharge nozzle.
8. The improvement claimed in claim 7, wherein said discharge passage is defined by an inner cylindrical surface of said shielding tube.
US07/125,605 1982-07-12 1987-11-25 Closure mechanism with gas seal Expired - Lifetime USRE33036E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3226047 1982-07-12
DE3226047A DE3226047C2 (en) 1982-07-12 1982-07-12 Connection between the outlet cone of the closure of a casting vessel for molten metal and the protective tube connected to it

Related Parent Applications (1)

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US06/512,127 Reissue US4555050A (en) 1982-07-12 1983-07-08 Closure mechanism with gas seal

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USRE33036E true USRE33036E (en) 1989-08-29

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US07/125,605 Expired - Lifetime USRE33036E (en) 1982-07-12 1987-11-25 Closure mechanism with gas seal

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US06/512,127 Ceased US4555050A (en) 1982-07-12 1983-07-08 Closure mechanism with gas seal

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AT (1) AT387168B (en)
DE (1) DE3226047C2 (en)
FR (1) FR2529811B1 (en)
IT (1) IT1171842B (en)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
US5106106A (en) * 1988-11-17 1992-04-21 Didier-Werke Ag Sealing structure for use in guiding molten metal from a metallurgical vessel and a seal thereof
US5133577A (en) * 1990-07-13 1992-07-28 Vereinigte Aluminium-Werke Aktiengesellschaft Refractory pipeline with gas-tight joint
US20050200124A1 (en) * 2004-03-12 2005-09-15 Kleefisch Mark S. High temperature joints for dissimilar materials
US20090272583A1 (en) * 2005-01-17 2009-11-05 Us Synthetic Corporation Superabrasive inserts including an arcuate peripheral surface

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DE3342071C2 (en) * 1983-11-22 1986-08-07 Didier-Werke Ag, 6200 Wiesbaden Device for shielding a metallic pouring stream
GB8521536D0 (en) * 1985-08-29 1985-10-02 British Steel Corp Molten metal teeming practice
DE3623937A1 (en) * 1986-07-16 1988-01-21 Didier Werke Ag FIRE-RESISTANT CHANNEL CONNECTION FOR TRANSMITTING STEEL MELT IN GIESSRAD CONTINUOUS CASTING MACHINES
US4892235A (en) * 1988-06-23 1990-01-09 Flo-Con Systems, Inc. Joint and shroud support for pour tube and collector nozzle
US4840297A (en) * 1988-08-05 1989-06-20 Vac Tec, Inc. Apparatus for shielding a molten metal stream
DE3927468A1 (en) * 1989-08-19 1991-03-21 Cerafer Sarl Tapping hole in metallurgical vessel - with channel brick and counter plate having gas ring between them to enable flushing of melt during tapping and to prevent oxide build-up
US4991752A (en) * 1990-01-22 1991-02-12 Labate M D Method and apparatus for stirring and pouring molten metal in a neutral atmosphere
DE4024520A1 (en) * 1990-08-02 1992-02-06 Didier Werke Ag CONNECTION BETWEEN THE OUTLET OF A METALLURGICAL VESSEL AND A PROTECTIVE PIPE OR DIP SPOUT
DE4034652A1 (en) * 1990-10-31 1992-05-07 Didier Werke Ag CONNECTION BETWEEN SPOUT AND PIPE PIPE ON METALLURGICAL VESSELS
JP2934187B2 (en) * 1996-05-17 1999-08-16 明智セラミックス株式会社 Long nozzle for continuous casting
DK0932463T3 (en) 1996-10-17 2001-10-01 Vesuvius Crucible Co Refractory aggregates
US5836140A (en) * 1996-11-13 1998-11-17 Lantech, Inc. Wrapping a load while controlling wrap tension
US5893258A (en) * 1996-12-20 1999-04-13 Lantech Technology Investment Corp. Building and wrapping a stabilized load
DE10238266A1 (en) * 2002-02-28 2003-11-06 Ibidi Gmbh Microfluidic system
DE10222026C1 (en) * 2002-05-17 2003-11-27 Refractory Intellectual Prop Assembly of a slide lock system
US9791080B2 (en) 2012-03-12 2017-10-17 Idex Health & Science Llc Microfluidic interconnect

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FR1474632A (en) * 1966-04-06 1967-03-24 United States Steel Corp Apparatus and method for continuous metal casting
US3502134A (en) * 1967-07-19 1970-03-24 United States Steel Corp Continuous casting method with inert gas puffs to prevent skulling
US3651825A (en) * 1969-10-24 1972-03-28 Francis P Sury Stopper plug valve for hot metal ladles
DE2733665A1 (en) * 1977-07-26 1979-02-08 Didier Werke Ag BOTTOM SEAL FOR VESSELS CONTAINING MELT
US4290589A (en) * 1979-03-17 1981-09-22 Didier-Werke Ag. Teeming pipe for use at the outlet of a melt container
EP0048641A1 (en) * 1980-09-15 1982-03-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Means for protecting molten metal in a sliding gate
WO1982001836A1 (en) * 1980-11-26 1982-06-10 Daussan Jean C Thermally insulating casting tube for metallurgic container
US4429816A (en) * 1981-03-03 1984-02-07 Uss Engineers And Consultants, Inc. Union for providing inert gas between teeming nozzle and pouring tube
US4456157A (en) * 1981-06-05 1984-06-26 Estel Hoogovens Bv Connection arrangement for a spout and an immersion nozzle, both of refractory material

Patent Citations (9)

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Publication number Priority date Publication date Assignee Title
FR1474632A (en) * 1966-04-06 1967-03-24 United States Steel Corp Apparatus and method for continuous metal casting
US3502134A (en) * 1967-07-19 1970-03-24 United States Steel Corp Continuous casting method with inert gas puffs to prevent skulling
US3651825A (en) * 1969-10-24 1972-03-28 Francis P Sury Stopper plug valve for hot metal ladles
DE2733665A1 (en) * 1977-07-26 1979-02-08 Didier Werke Ag BOTTOM SEAL FOR VESSELS CONTAINING MELT
US4290589A (en) * 1979-03-17 1981-09-22 Didier-Werke Ag. Teeming pipe for use at the outlet of a melt container
EP0048641A1 (en) * 1980-09-15 1982-03-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Means for protecting molten metal in a sliding gate
WO1982001836A1 (en) * 1980-11-26 1982-06-10 Daussan Jean C Thermally insulating casting tube for metallurgic container
US4429816A (en) * 1981-03-03 1984-02-07 Uss Engineers And Consultants, Inc. Union for providing inert gas between teeming nozzle and pouring tube
US4456157A (en) * 1981-06-05 1984-06-26 Estel Hoogovens Bv Connection arrangement for a spout and an immersion nozzle, both of refractory material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5106106A (en) * 1988-11-17 1992-04-21 Didier-Werke Ag Sealing structure for use in guiding molten metal from a metallurgical vessel and a seal thereof
US5133577A (en) * 1990-07-13 1992-07-28 Vereinigte Aluminium-Werke Aktiengesellschaft Refractory pipeline with gas-tight joint
US20050200124A1 (en) * 2004-03-12 2005-09-15 Kleefisch Mark S. High temperature joints for dissimilar materials
US20090272583A1 (en) * 2005-01-17 2009-11-05 Us Synthetic Corporation Superabrasive inserts including an arcuate peripheral surface

Also Published As

Publication number Publication date
IT8348637A0 (en) 1983-07-07
FR2529811A1 (en) 1984-01-13
IT1171842B (en) 1987-06-10
DE3226047A1 (en) 1984-01-12
DE3226047C2 (en) 1985-11-28
ATA253883A (en) 1988-05-15
AT387168B (en) 1988-12-12
US4555050A (en) 1985-11-26
FR2529811B1 (en) 1987-02-20

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