EP0080248B1 - Refractory components - Google Patents

Refractory components Download PDF

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Publication number
EP0080248B1
EP0080248B1 EP82300846A EP82300846A EP0080248B1 EP 0080248 B1 EP0080248 B1 EP 0080248B1 EP 82300846 A EP82300846 A EP 82300846A EP 82300846 A EP82300846 A EP 82300846A EP 0080248 B1 EP0080248 B1 EP 0080248B1
Authority
EP
European Patent Office
Prior art keywords
insert
nozzle
refractory
plate
stem
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
EP82300846A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0080248A1 (en
Inventor
Charles Spencer West
David Edward Park
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.)
Gr Stein Refractories Ltd
Original Assignee
Gr Stein Refractories Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10526143&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0080248(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Gr Stein Refractories Ltd filed Critical Gr Stein Refractories Ltd
Priority to AT82300846T priority Critical patent/ATE23022T1/de
Publication of EP0080248A1 publication Critical patent/EP0080248A1/en
Application granted granted Critical
Publication of EP0080248B1 publication Critical patent/EP0080248B1/en
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
    • B22D41/14—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
    • B22D41/28—Plates therefor

Definitions

  • This invention relates to refractory components and more particularly relates to refractory inserts for use in fixed or slidable plates in vessel equipment commonly known as slide gate valves in metal melting casting shops.
  • slide gate valves are teeming control mechanisms for use on ladles/tundishes and essentially comprise two apertured plates, one fixed and in line with an aperture in the bottom of the vessel and the other slidably mounted beneath the fixed plate, the metal being discharged when the two apertures are aligned with one another.
  • the plates are made from a refractory material and each abut other refractory nozzles, an upper nozzle mounted above the stationary plate and a lower or collector nozzle mounted below the sliding plate.
  • the apertures (bores) are eroded by the hot metal and repairs are then effected to enable the components, particularly the more expensive fixed and sliding plates, to be re-used.
  • a second disadvantage is that the travel of the sliding plate during operation can frequently bring the cemented joint between the insert and plate across the bore in the stationary upper place, exposing the joint to molten metal, and thus promoting erosion.
  • a third disadvantage is that the wall thickness of the cylindrical insert is limited by the geometry of the sliding plate in some systems, thereby restricting the useful life of a repaired plate to the degree of bore erosion extending to the cemented joint.
  • This invention provides a refractory component for use in equipment in metal melt-holding vessels, comprising a parallel-faced elongated plate, a circular section apertured nozzle mounted on one surface thereof, and an apertured refractory insert having a parallel-faced elongated head of elliptical form sited in the plate and an integral stem of circular cross-section, the apertures in the insert and the nozzle being aligned with one another and lying coaxially with both the stem and the nozzle, characterised in that the stem protrudes into the nozzle thereby presenting a step-shaped insert-to-nozzle contact which inhibits the escape of molten metal along this route.
  • the major portion of the outer periphery of the component, other than the plain face on the other side of the plate, may be bounded by a metal casing, the whole forming a sliding plate/ collector nozzle unit.
  • the length of the insert can be such as to exceed the longitudinal movement of the mechanism, thus removing the cement joint out of the range of metal attack and eliminating the second and third disadvantages of the cylindrical insert. Moreover, because of the increased mass of the insert, and its broad base, the chances of vertical movement are greatly reduced. In addition to mitigating the problems recited, the provision of the stem to protrude into the nozzle provides an additional advantage in the sense that it "bridges" what would otherwise be a plain joint between the plate and the nozzle.
  • the advantages of both the elongated and circular inserts are realised by this invention.
  • the function of the elongated head is that of the flat elongated insert first recited while the cylindrical stem affords a secure attachment to the nozzle and introduces a step-shaped insert-to-nozzle contact which inhibits the escape of molten metal from the system.
  • a T-shaped insert per se is known for example GB-A-1322764 but this does not protrude into the collector nozzle and thus does not realise the advantage just recited.
  • the insert would be used in repaired plates but it could alternatively be adopted in new or prime plates; after use the insert may readily be removed and a further one introduced thus avoiding the necessity for cutting and drilling.
  • the insert may not necessarily be pre-formed and the invention also comprises a modification of the various aspects referred to above in which the insert is a monolithic refractory rammed in situ and cured.
  • the insert comprises a moulded and fired refractory component of e.g. magnesia or high-purity alumina, shaped so as to define a plain parallel-faced generally elliptical body having a bore centrally disposed therethrough.
  • a moulded and fired refractory component of e.g. magnesia or high-purity alumina, shaped so as to define a plain parallel-faced generally elliptical body having a bore centrally disposed therethrough.
  • the alternative form of insert comprises a moulded and fired T-shaped refractory component of e.g. magnesia or high-purity alumina, shaped so as to define a generally elliptical head portion 1 and a dependent circular section stem 2; a circular section bore 3 extends through this component.
  • a moulded and fired T-shaped refractory component of e.g. magnesia or high-purity alumina, shaped so as to define a generally elliptical head portion 1 and a dependent circular section stem 2; a circular section bore 3 extends through this component.
  • Figure 4 shows the latter insert mounted in the sliding element of a slide gate valve comprising a generally elliptical parallel-sided plate 4 and a refractory collector nozzle 5 having a bore 6. These may be made from magnesite chrome. A metal casing 7 is provided around the bulk of this unit, and this may be bedded-in with a refractory cement 8.
  • the insert is used as a repair in the sense that an elliptical shaped hollow is machined from the plate 4 to the dimension of the head portion 1 of the insert and a circular section hole is drilled in the upper portion of the nozzle 5 to the dimensions of the stem 2.
  • the insert is then cemented into position as shown and the through bore is made up to a smooth contour by cement 9.
  • the exposed upper face of the component is then ground to present a flat uniform surface.
  • the repair may equally well be effected by ramming a refractory cement into the T-shaped hollow, a circular spigot being positioned in the central bore.
  • a typical ramming mix which might be used may be alumina containing a chemical bonding agent such as phosphate, the cement then being cured at e.g. 350°C and the plate ground as before.
  • the insert may be replaced more than once, whether it be from a repair (as shown) or from a prime component incorporating an insert.
  • the insert may be differently dimensioned and shaped consistent with the T-shaped concept and different materials may be utilised.
  • the insert may be used for the repair of the fixed plates/upper nozzles in slide gate valves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Glass Compositions (AREA)
  • Ceramic Products (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Luminescent Compositions (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
EP82300846A 1981-11-25 1982-02-19 Refractory components Expired EP0080248B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82300846T ATE23022T1 (de) 1981-11-25 1982-02-19 Feuerfestbestandteile.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8135558 1981-11-25
GB8135558 1981-11-25

Publications (2)

Publication Number Publication Date
EP0080248A1 EP0080248A1 (en) 1983-06-01
EP0080248B1 true EP0080248B1 (en) 1986-10-22

Family

ID=10526143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82300846A Expired EP0080248B1 (en) 1981-11-25 1982-02-19 Refractory components

Country Status (9)

Country Link
EP (1) EP0080248B1 (sv)
AT (1) ATE23022T1 (sv)
DE (1) DE3273883D1 (sv)
ES (1) ES277946Y (sv)
FI (1) FI823963L (sv)
GB (1) GB2110343B (sv)
NO (1) NO823938L (sv)
PT (1) PT75865B (sv)
SE (1) SE8206681L (sv)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH659872A5 (de) * 1983-09-02 1987-02-27 Stopinc Ag Verschlussplatte fuer einen schiebeverschluss.
DE3434857C1 (de) * 1984-09-22 1992-06-11 Didier-Werke Ag, 6200 Wiesbaden Schieberverschluss fuer den Ausguss metallurgischer Gefaesse
GB8507277D0 (en) * 1985-03-20 1985-04-24 British Steel Corp Refractory component
DE3533253C1 (de) * 1985-09-18 1987-03-12 Didier Werke Ag Feuerfeste Verschleissteile fuer Schieberverschluesse am Ausguss metallurgischer Gefaesse
DE9006264U1 (de) * 1990-06-02 1990-08-09 Kliewer, Winfried, 4300 Essen Ausgußvorrichtung für Schiebersysteme
DE4042203C2 (de) * 1990-12-29 2003-03-20 Egon Evertz Schieberplatte für Schieberverschlüsse von metallurgischen Gefäßen
AU4866199A (en) * 1999-07-01 2001-01-22 Vesuvius Crucible Company Soft-bore monoblock pouring tube

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1889105U (de) * 1961-04-20 1964-03-12 Stoecker & Kunz G M B H Ausgussstein fuer fluessige metalle.
GB1196993A (en) * 1968-05-11 1970-07-01 Dyson Ltd J & J Improvements in Refractory Nozzles
DE2019541C3 (de) * 1970-04-23 1975-02-06 Didier-Werke Ag, 6200 Wiesbaden Als Verbundkörper ausgebildeter Ausguß an flüssige Metallschmelze enthaltenden Behältern
GB1589659A (en) * 1977-05-13 1981-05-20 Vysoka Skola Chem Tech Refractory plates
DE7908300U1 (de) * 1979-03-24 1979-07-12 Zimmermann & Jansen Gmbh, 5160 Dueren Schieberelement fuer den schieberverschluss einer giesspfanne, insbesondere einer stahlgiesspfanne
IT1131943B (it) * 1980-07-10 1986-06-25 Flocon Italiana Procedimento per rigenerare o modificare piastre refrattarie dei cassetti di colata delle siviere

Also Published As

Publication number Publication date
EP0080248A1 (en) 1983-06-01
FI823963L (fi) 1983-05-26
ATE23022T1 (de) 1986-11-15
NO823938L (no) 1983-05-26
PT75865A (en) 1982-12-01
GB2110343A (en) 1983-06-15
FI823963A0 (fi) 1982-11-18
SE8206681L (sv) 1983-05-26
PT75865B (en) 1985-12-09
ES277946Y (es) 1985-04-01
SE8206681D0 (sv) 1982-11-24
ES277946U (es) 1984-10-01
GB2110343B (en) 1985-11-06
DE3273883D1 (en) 1986-11-27

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