EP0195158A2 - Zwischengefäss-Ausfluss-Vorrichtungen - Google Patents

Zwischengefäss-Ausfluss-Vorrichtungen Download PDF

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Publication number
EP0195158A2
EP0195158A2 EP85306696A EP85306696A EP0195158A2 EP 0195158 A2 EP0195158 A2 EP 0195158A2 EP 85306696 A EP85306696 A EP 85306696A EP 85306696 A EP85306696 A EP 85306696A EP 0195158 A2 EP0195158 A2 EP 0195158A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
outlet means
well block
passages
means according
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Withdrawn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
EP85306696A
Other languages
English (en)
French (fr)
Other versions
EP0195158A3 (de
Inventor
John W. Beaton
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.)
Co Steel International Ltd
Original Assignee
Co Steel International 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
Application filed by Co Steel International Ltd filed Critical Co Steel International Ltd
Publication of EP0195158A2 publication Critical patent/EP0195158A2/de
Publication of EP0195158A3 publication Critical patent/EP0195158A3/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Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to tundish outlet means for use in the continuous casting of metal such as steel.
  • a tundish receives liquid steel from a ladle and feeds it through an outlet to a mould in continuous casting apparatus.
  • the liquid steel is poured from a ladle into a multi-holed tundish for distributing the liquid metal through outlet nozzles to mould-oscillators which each form a continuous strand of solid metal on cooling.
  • the flow rate of the metal from the ladle is controlled to optimize the level of the metal in the tundish.
  • the oscillators move the moulds up and down to provide a stripping action between the moulds and the billets of solid metal as they are formed. This is followed by a straightener unit which pulls the strands out of the mould at a given rate.
  • the speed of withdrawal from the mould is controlled. As this speed is tied to the level of metal in the mould, the flow of metal into the mould is critical. ' The outlet nozzle diameter size controls the flow rate of the metal into the mould.
  • Outlet means comprises a well block and a nozzle receivable therein.
  • the nozzle has a number of flowthrough passages, which preferably converge towards the top of a casting mould. Two or more passages may be provided in the nozzle. On the wearing out or plugging of one passage, the use of the nozzle may be continued by plugging that passage and opening another.
  • the well block is preferably supported by a ring comprising an outer rim contacting a mounting plate welded in an aperture in the tundish bottom and an inner ledge.
  • the well block also preferably comprises an inwardly funneled upper portion, an outwardly flared lower portion for receiving the nozzle, and a straight neck between.
  • a tundish 10 is provided with a circumscribing wall 12 and a bottom 14 having openings 15, each with a mounting plate 16 for an outlet nozzle 18 (Figures 2 and 3) of refractory material such as zirconia.
  • a well block 20 receives the nozzle 18 and is supported by a ring 22.
  • the mounting plate 16 provides a central aperture 26.
  • the ring 22 has an outer rim 28, a shoulder 30 and an inner ledge 32, fits into the aperture 26, and supports the well block 20 which has the same external shape.
  • the well block 20 is generally cylindrical with an inwardly funneled upper portion 34, a straight central neck 36 and a lower portion 38 which flares outwardly at a small angle.
  • the nozzle 18 consists of a body 40 with three flowthrough passages 42 located symmetrically about its central axis 43. Each passage 42 is funnel-shaped with an upper truncated conical portion 44 and a lower cylindrical portion 46. A number of equispaced fins 48 project radially into the upper portion 44 of each passage 42.
  • the outside surface of the body 40 is tapered slightly at its upper portion 50 to match the flare in lower portion 38 of the well block 20.
  • the passages 42 are slightly convergent to meet at a point below the body 40 where the central axis 43 contacts the top of a casting mould (not shown).
  • the passages 42 should be as close to vertical as possible when installed, so the body 40 is of a generally triangular shape with rounded edges.
  • the inlet end of the body 40 is sectored so that the inlet end of each passage is pie-shaped and arranged segmentally about the central axis 43.
  • the nozzle 18 is mounted in the opening 15 of the tundish 10.
  • the mounting plate 16 is welded to the bottom 14 of the tundish 10.
  • the support ring 22 rests on the mounting plate.
  • the well block 20 rests on a ledge 32 of the ring 22.
  • the well block is embedded in a refractory lining 52 of the tundish 10. Then nozzle 18 is wedged upwardly through the opening 15 in the tundish bottom 14 to fit coaxially in the lower portion 38 of the well block 20.
  • two passages 42 of nozzle 18 are plugged using steel plugs and sand, and the third passage is used.
  • the initially used passage 42 is worn out or blocked, it is plugged, preferably using a copper plug, and one of the other two passages is opened using an oxygen lance to burn off the plug.
  • the second used passage 42 is blocked or worn out, it is plugged and the third passage is opened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP85306696A 1985-03-18 1985-09-20 Zwischengefäss-Ausfluss-Vorrichtungen Withdrawn EP0195158A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71341285A 1985-03-18 1985-03-18
US713412 1996-09-13

Publications (2)

Publication Number Publication Date
EP0195158A2 true EP0195158A2 (de) 1986-09-24
EP0195158A3 EP0195158A3 (de) 1987-06-16

Family

ID=24866040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85306696A Withdrawn EP0195158A3 (de) 1985-03-18 1985-09-20 Zwischengefäss-Ausfluss-Vorrichtungen

Country Status (2)

Country Link
EP (1) EP0195158A3 (de)
JP (1) JPS61212467A (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706365A (en) * 1954-02-18 1955-04-19 Owens Corning Fiberglass Corp Feeder for molten thermoplastic material
US4165026A (en) * 1971-12-07 1979-08-21 Foseco Trading A.G. Tundish with expendable lining and easily removable nozzle
US4079868A (en) * 1976-11-01 1978-03-21 Dresser Industries, Inc. Castellated tundish nozzle
CH620383A5 (en) * 1977-04-28 1980-11-28 Concast Ag Method and apparatus for continuous casting

Also Published As

Publication number Publication date
JPS61212467A (ja) 1986-09-20
EP0195158A3 (de) 1987-06-16

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Inventor name: BEATON, JOHN W.