EP0136733A1 - Metal teeming seals - Google Patents

Metal teeming seals Download PDF

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Publication number
EP0136733A1
EP0136733A1 EP84201089A EP84201089A EP0136733A1 EP 0136733 A1 EP0136733 A1 EP 0136733A1 EP 84201089 A EP84201089 A EP 84201089A EP 84201089 A EP84201089 A EP 84201089A EP 0136733 A1 EP0136733 A1 EP 0136733A1
Authority
EP
European Patent Office
Prior art keywords
shroud
seal
nozzle
gasket
steel
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Withdrawn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
EP84201089A
Other languages
German (de)
English (en)
French (fr)
Inventor
Robert Roy Rae
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Publication of EP0136733A1 publication Critical patent/EP0136733A1/en
Withdrawn legal-status Critical Current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 seal can easily be broken at the end of casting one ladle and can be readily re-made on a second ladle to the existing shroud when sequencing casts, that is, discharging in sequence the contents of successive ladles moved into position over the tundish.
  • the seal maintains its integrity during the movement of the nozzle as the slide gate valve is opened and throttled etc during teeming, ie it adjusts to the positions and attitudes adopted during the stream flow control.
  • FIG. 1 there is shown only one relevent component of the sliding gate valve, namely the collector 1 having a tapered end 2 on its dependent nozzle.
  • a flared tubular refractory shroud 3 Mounted beneath the collector nozzle is a flared tubular refractory shroud 3 and this is mounted and supported on a separate platform (not shown).
  • the lower end of the shroud is immersed below the level of the molten steel 4 in the tundish 5, the surface of the steel being covered with a layer of insulating powder 6.
  • the junction between the upper flared end of the shroud 3 and the collector 2 is sealed by an 0-ring 7 which is sandwiched in place as the nozzle and shroud mate together. More particularly, this ring comprises a tubular casing of flame retardant or flame resistant material enclosing within it a powdery composition of eg boric oxide and calcium/alumino silicate.
  • steel is teemed through the nozzle as it is moved into alignment with the ladle pour opening (not shown) and as the temperature of the junction rises consequent upon this the composition within the tubular casing of the o-ring softens and the whole assumes a shape and attitude to seal the junction and fill any voids.
  • the tubular casing should simply be strong enough to withstand minor abrasion so as to retain the composition within it before volatilisation and may be formed from a plastics material e.g polyvinylchloride in the manner of a sausage skin or a plastics hose or even tough paper; each may be treated with sodium silicate for flame resistance.
  • a plastics material e.g polyvinylchloride in the manner of a sausage skin or a plastics hose or even tough paper; each may be treated with sodium silicate for flame resistance.
  • Figure 2 shows an alternative form of seal in which a tapered ring gasket 8 of conventional design has a cementitious softenable composition 9, as above, layered on to its surface so that when compressed into position this surface layer completes a gas-impervious seal over the normally pervious gasket.
  • the precise positioning of the seal is not critical so long as the junction is effectively closed and it is not essential for the collector and the shroud to have mating tapers. Positioning of the seal may be facilitated by incorporating a protruding handle by which it can be manipulated from a distance.
  • the dependent nozzle may not necessarily be a component of a slide gate valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Ceramic Products (AREA)
  • Gasket Seals (AREA)
EP84201089A 1983-08-10 1984-07-24 Metal teeming seals Withdrawn EP0136733A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838321585A GB8321585D0 (en) 1983-08-10 1983-08-10 Metal teeming seals
GB8321585 1983-08-10

Publications (1)

Publication Number Publication Date
EP0136733A1 true EP0136733A1 (en) 1985-04-10

Family

ID=10547133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201089A Withdrawn EP0136733A1 (en) 1983-08-10 1984-07-24 Metal teeming seals

Country Status (3)

Country Link
EP (1) EP0136733A1 (es)
ES (1) ES534964A0 (es)
GB (2) GB8321585D0 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282247A1 (en) * 1987-03-06 1988-09-14 Thor Ceramics Limited Refractory assemblies
FR2635283A1 (fr) * 1988-08-11 1990-02-16 Flo Con Syst Joint de tube protecteur pour la coulee de metaux en fusion
EP0759415A1 (en) * 1993-10-15 1997-02-26 Shinagawa Refractories Co., Ltd. Packing material for refractory
DE19757802C1 (de) * 1997-12-30 1999-08-26 Didier Werke Ag Gas- und/oder flüssigkeitsdichte Verbindung von Abschnitten eines mehrteiligen feuerfesten Kanals
DE19758071C1 (de) * 1997-12-30 1999-08-26 Didier Werke Ag Halterung von Teilen eines mehrteiligen Kanals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2345015A (en) * 1998-12-23 2000-06-28 Didier Werke Ag Refractory shield for use in metal teeming

Citations (5)

* 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
DE2625742A1 (de) * 1975-06-09 1976-12-23 Centre Rech Metallurgique Ausguss fuer metallurgische schmelzen
DE2743312A1 (de) * 1977-09-27 1979-03-29 Didier Werke Ag Verfahren und vorrichtung zum herabsetzen des verschleisses eines eintauchausgusses
US4165026A (en) * 1971-12-07 1979-08-21 Foseco Trading A.G. Tundish with expendable lining and easily removable nozzle
DE2919880A1 (de) * 1979-05-17 1980-11-27 Didier Werke Ag Giessrohr

Patent Citations (5)

* 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
DE2625742A1 (de) * 1975-06-09 1976-12-23 Centre Rech Metallurgique Ausguss fuer metallurgische schmelzen
DE2743312A1 (de) * 1977-09-27 1979-03-29 Didier Werke Ag Verfahren und vorrichtung zum herabsetzen des verschleisses eines eintauchausgusses
DE2919880A1 (de) * 1979-05-17 1980-11-27 Didier Werke Ag Giessrohr

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282247A1 (en) * 1987-03-06 1988-09-14 Thor Ceramics Limited Refractory assemblies
FR2635283A1 (fr) * 1988-08-11 1990-02-16 Flo Con Syst Joint de tube protecteur pour la coulee de metaux en fusion
EP0759415A1 (en) * 1993-10-15 1997-02-26 Shinagawa Refractories Co., Ltd. Packing material for refractory
EP0759415A4 (en) * 1993-10-15 1997-11-26 Shinagawa Refractories Co COVER OF REFRACTORY MATERIAL
DE19757802C1 (de) * 1997-12-30 1999-08-26 Didier Werke Ag Gas- und/oder flüssigkeitsdichte Verbindung von Abschnitten eines mehrteiligen feuerfesten Kanals
DE19758071C1 (de) * 1997-12-30 1999-08-26 Didier Werke Ag Halterung von Teilen eines mehrteiligen Kanals

Also Published As

Publication number Publication date
ES8505461A1 (es) 1985-05-16
GB2144662A (en) 1985-03-13
GB8321585D0 (en) 1983-09-14
GB2144662B (en) 1986-08-28
GB8419955D0 (en) 1984-09-12
ES534964A0 (es) 1985-05-16

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR IT LI NL SE

17P Request for examination filed

Effective date: 19850902

17Q First examination report despatched

Effective date: 19860820

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870723

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RAE, ROBERT ROY