US3545529A - Apparatus for maintaining a special atmosphere above a casting mold - Google Patents

Apparatus for maintaining a special atmosphere above a casting mold Download PDF

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Publication number
US3545529A
US3545529A US717200A US3545529DA US3545529A US 3545529 A US3545529 A US 3545529A US 717200 A US717200 A US 717200A US 3545529D A US3545529D A US 3545529DA US 3545529 A US3545529 A US 3545529A
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US
United States
Prior art keywords
mold
plates
maintaining
casting mold
special atmosphere
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 - Lifetime
Application number
US717200A
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English (en)
Inventor
Robert J Keene
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.)
United States Steel Corp
Original Assignee
United States 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 United States Steel Corp filed Critical United States Steel Corp
Application granted granted Critical
Publication of US3545529A publication Critical patent/US3545529A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Definitions

  • the plates have observation windows therein.
  • Protective hoods are removably disposed over the windows.
  • This invention relates to continuous casting and, in particular, to means for confining a protective atmosphere in the casting mold above the surface of the liquid metal therein.
  • I employ a frame fitting on top of the mold, having I slideways for a pair of closure plates. These plates when moved together jointly cover the mold cavity and support a ring or collar through which the'extension tube of a ladle nozzle may be inserted. Each plate carries a manifold therebelow from which extend nozzles delivering jets of inert gas sweeping the metal surface and displacing the oxygen-bearing atmosphere therefrom. A hood with a viewing window may be placedon each plate or the plates themselves may be fitted with windows.
  • a tubular flowthrough water-cooled mold is adapted to receive molten metal from above and deliver from its lower end a continuous columnar casting of a section corresponding to that of the mold cavity.
  • a frame 11 dimensioned to overlie the cavity has lugs 12 whereby it may be secured on top of the mold.
  • the frame has parallel ways 13 thereon slidably accommodating between them a pair of plates 14, which together substantially cover the top of the mold cavity.
  • the plates have windows 14a and 15a therein which may be glazed with tempered glass.
  • the adjacent edges of the plates have aligned semicircular notches together forming a seat for a split graphite ring or collar 16 in which a circumferential exterior groove 17 (FIG. 5a) is formed to accommodate the edges of the notches.
  • Each of the plates 14, 15 has a manifold 18 therebelow supported by pipes 19 extending vertically through the inner edge of the plate and connected to the ends of the manifold (FIG. 4).
  • a supply yoke 20 is connected to the upper ends of pipes 19 and has a connection 21 to a source of suitable inert gas, such as argon, under pressure.
  • Nozzles 22 spaced along manifolds 18 discharge argon jets sweeping the surface of the molten metal in mold 10.
  • Plates Hand 15 are partially retracted or whollyremoved when the ladle and its extension tube are being brought into position. Thereafter the plates are moved into the illustrated positions and the inert gas is supplied to pipes 21.
  • the gas affords a protective atmosphere for the surface of the molten metal and prevents oxidation.
  • My mold cover confines the special atmosphere but permits slight leakage when a positive pressure of inert gas above that of the outside atmosphere is maintained in the mold cavity.
  • the jets from nozzles 22 tend to collect scum floating on the metal at the ends of the mold from which positions it may be readily spooned or dipped on removal of plates 14, 15.
  • Box hoods 23 may be placed on plates l4, 15 with their open ends adjacent. 'I'hehoods have glazed observation windows 24. When the hoods are employed, the glazing of the window openings in plates 14, 15 may be omitted.
  • my invention has the advantage of providng a protective atmosphere above the metal in the mold so as to prevent oxidation of the metal and the resultant formation of scum.
  • Graphite ring permits mold 10 and plates 14 and 15 to reciprocate vertically while the nozzle-extension tube remains stationary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US717200A 1968-03-29 1968-03-29 Apparatus for maintaining a special atmosphere above a casting mold Expired - Lifetime US3545529A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71720068A 1968-03-29 1968-03-29

Publications (1)

Publication Number Publication Date
US3545529A true US3545529A (en) 1970-12-08

Family

ID=24881106

Family Applications (1)

Application Number Title Priority Date Filing Date
US717200A Expired - Lifetime US3545529A (en) 1968-03-29 1968-03-29 Apparatus for maintaining a special atmosphere above a casting mold

Country Status (8)

Country Link
US (1) US3545529A (de)
AT (1) AT294337B (de)
BE (1) BE730725A (de)
DE (1) DE1915814A1 (de)
ES (1) ES365380A1 (de)
FR (1) FR2005120A1 (de)
GB (1) GB1255236A (de)
NL (1) NL6904675A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718175A (en) * 1969-04-15 1973-02-27 Voest Ag Plant for continuous casting without deep casting stream penetration
US3776295A (en) * 1970-12-24 1973-12-04 Etudes De Centrifugation Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification
US3811490A (en) * 1971-03-16 1974-05-21 British Steel Corp Continuous casting of rimming steel
US4062397A (en) * 1976-03-16 1977-12-13 Cashdollar Sr Robert E Protection against oxidation of molten metal streams in continuous casting
CN111922329A (zh) * 2019-05-13 2020-11-13 天工爱和特钢有限公司 一种模具钢冶炼浇注用的新型氩气保护罩

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541915A2 (fr) * 1982-02-15 1984-09-07 Poncet Pierre Dispositif d'amenee du metal dans les lingotieres de coulee continue

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718175A (en) * 1969-04-15 1973-02-27 Voest Ag Plant for continuous casting without deep casting stream penetration
US3776295A (en) * 1970-12-24 1973-12-04 Etudes De Centrifugation Method of continuous rotary casting of metal utilizing a liquefied gas to facilitate solidification
US3811490A (en) * 1971-03-16 1974-05-21 British Steel Corp Continuous casting of rimming steel
US4062397A (en) * 1976-03-16 1977-12-13 Cashdollar Sr Robert E Protection against oxidation of molten metal streams in continuous casting
CN111922329A (zh) * 2019-05-13 2020-11-13 天工爱和特钢有限公司 一种模具钢冶炼浇注用的新型氩气保护罩
CN111922329B (zh) * 2019-05-13 2024-04-26 江苏天工爱和科技有限公司 一种模具钢冶炼浇注用的新型氩气保护罩

Also Published As

Publication number Publication date
FR2005120A1 (fr) 1969-12-05
DE1915814A1 (de) 1969-10-16
AT294337B (de) 1971-11-25
BE730725A (de) 1969-09-29
GB1255236A (en) 1971-12-01
NL6904675A (de) 1969-10-01
FR2005120B1 (de) 1974-09-20
ES365380A1 (es) 1971-01-01

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