US3468361A - Continuous metal casting method - Google Patents

Continuous metal casting method Download PDF

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Publication number
US3468361A
US3468361A US596292A US3468361DA US3468361A US 3468361 A US3468361 A US 3468361A US 596292 A US596292 A US 596292A US 3468361D A US3468361D A US 3468361DA US 3468361 A US3468361 A US 3468361A
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US
United States
Prior art keywords
casting
mold
molten
salt
shell
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
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US596292A
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English (en)
Inventor
Howard A Fromson
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Individual
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Individual
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Filing date
Publication date
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Publication of US3468361A publication Critical patent/US3468361A/en
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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
    • B22D11/14—Plants for continuous casting
    • B22D11/143—Plants for continuous casting for horizontal casting
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1241—Accessories for subsequent treating or working cast stock in situ for cooling by transporting the cast stock through a liquid medium bath or a fluidized bed
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1245—Accessories for subsequent treating or working cast stock in situ for cooling using specific cooling agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S65/00—Glass manufacturing
    • Y10S65/04—Electric heat

Definitions

  • the casting so formed is advanced horizontally didepth at which the pressure acting on the periphery of the solid casting shell sufficiently counteracts the pressure of the molten core in this casting to prevent rupture.
  • the casting is maintained substantially at this depth until the casting is sufficiently solidified in the coolant to prevent outbreak of the molten core, and the casting so sufiiciently solidified is discharged continuously from the coolant bath.
  • This invention relates to the art of continuous casting of molten metal.
  • a molten metal such as steel
  • such metal is led into one end of a water-cooled mold, which may be made of copper or a copper alloy.
  • the mold is open at both ends and may be of any convenient cross-sectional shape, but is usually round or rectangular in cross-section.
  • the metal in contact with the mold walls solidifies, forming a solid shell which remains filled with a molten metal core. This shell is continually pulled from the exit end of the mold and, as further cooling progresses, the molten core gradually solidifies.
  • a ladle 10 is shown.
  • the ladle supplies molten metal to a refractory tundish 11 through ladle pipe 12.
  • An exit pipe 13 provides a path by which the molten metal 14 in the tundish may reach a mold 15.
  • Water passages 16 allow cooling of mold 15, which may be made of copper.
  • the mold has interior surfaces defining a mold bore 17.
  • the walls of the mold bore 17 may be parallel or, as shown in the drawing, they may have a straightsided portion and an exit portion where the walls flare outward so that the cross-sectional area of the bore increases from the entrance to the exit.
  • Cooling passages 23 are embedded in the chamber walls to facilitate the removal of heat from the salt and a rotatable stirrer 24 may be provided to direct a current of salt against the ingot 25 as it emerges from the mold.
  • rollers 26 which may be rotatably held in loose metal journals, The salt will tend to lubricate such bearings.
  • the apparent weight of the ingot on the rollers is reduced by the flotation effect of the salt bath.
  • An opening for the ingot to leave the salt bath is provided by a copper exit ring 27 having internal passages 28 through which a cooling solution may be passed.
  • a central opening defined by surface 29 is provided through the exit ring, said opening being alined with the opening in mold bore 17.
  • the central opening is shaped to conform to the surface of the ingot as it passes therethrough, but preferably a small space is left between the surface 29 and the surface of the ingot in order to prevent wear of the exit ring.
  • Molten salt enters this space and freezes due to contact with the exit ring 27.
  • This salt acts as packing to prevent undue loss of salt from the mass within the chamber.
  • the film of salt left upon the emerging ingot may be cracked therefrom by rolls or other devices, or washed off by cooling water.
  • a tray 30 is provided to receive such salt fragments, which may be periodically returned to the salt chamber.
  • Further cooling of the ingot may be accomplished by water spray nozzle 31, after which the ingot may be cut into pieces of a desired length by any suitable means.
  • a method of continuously casting a molten metal comprising the steps of continuously introducing said molten metal into a mold having a bore extending in a substantially horizontal direction, cooling a portion of said molten metal below its freezing point in said mold bore by contact with said mold and thereby forming a solid shell, moving said solid shell from the mold bore into a bath of molten coolant of a temperature lower than the melting point of the molten metal and thereby removing heat from the solid shell and passing the solid shell in a substantially horizontal direction from the bath of molten coolant through an orifice defined by surfaces which are cooler than the melting point of the molten coolant and which conform to the surface of the shell to form thereby a thin layer of solidified coolant on the surface of the shell, as it passes through said orifice.
  • a method of continuously casting a molten metal comprising continuously introducing molten metal under pressure into a mold having a bore with cooling walls to produce a partially solidified casting comprising a solid shell surrounding a molten core, continuously advancing said casting as it is formed and while in partially solidified condition substantially horizontally from said mold directly into contact with a bath of liquid coolant at a rate to cause a substantial length of said casting to be immersed in said coolant While in said partially solidified condition and at a depth in which the pressure of the coolant acting on the periphery of said partially solidified casting is sufliciently high to counteract the core pressure in said casting and thereby to prevent rupturing of said solid shell due to said core pressure, maintaining said casting While it is advancing in said coolant substantially at said depth to maintain said counteracting pressure action substantially constant until the casting is sufliciently solidified in said coolant to prevent outbreak of the molten core in the absence of coolant pressure, and continuously discharging the casting from said coolant bath.
  • liquid coolant is barium chloride

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US596292A 1966-11-22 1966-11-22 Continuous metal casting method Expired - Lifetime US3468361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59629266A 1966-11-22 1966-11-22

Publications (1)

Publication Number Publication Date
US3468361A true US3468361A (en) 1969-09-23

Family

ID=24386744

Family Applications (1)

Application Number Title Priority Date Filing Date
US596292A Expired - Lifetime US3468361A (en) 1966-11-22 1966-11-22 Continuous metal casting method

Country Status (9)

Country Link
US (1) US3468361A (enrdf_load_stackoverflow)
AU (1) AU5675869A (enrdf_load_stackoverflow)
BE (1) BE734876A (enrdf_load_stackoverflow)
CH (1) CH511654A (enrdf_load_stackoverflow)
DE (1) DE1931206A1 (enrdf_load_stackoverflow)
FR (1) FR2050546A5 (enrdf_load_stackoverflow)
GB (1) GB1266020A (enrdf_load_stackoverflow)
LU (1) LU58913A1 (enrdf_load_stackoverflow)
NL (1) NL6909531A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658117A (en) * 1970-05-07 1972-04-25 Fromson H A Continuous metal casting method and apparatus
EP0013076A1 (en) * 1978-11-27 1980-07-09 Secretary of State for Industry in Her Britannic Majesty's Gov. of the United Kingdom of Great Britain and Northern Ireland Process and apparatus for producing metallic slurries
US4751959A (en) * 1984-12-27 1988-06-21 Sms Concast Inc. Method of and apparatus for continuously casting metals
US4765390A (en) * 1986-05-13 1988-08-23 Concast Service Union Ag Method of and arrangement for cooling a continuously cast strand

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE669725C (de) * 1939-01-16 Hugo Hahn Klappe zum UEberbruecken der Durchfalloeffnungen fuer die Kugeln von Geschicklichkeitsspielen
FR878023A (fr) * 1939-01-24 1943-01-08 Kohle Und Eisenforschung Gmbh Procédé de coulée continue de pièces
US2754559A (en) * 1955-02-11 1956-07-17 Howard A Fromson Method for the casting of sheets of a fusible material
US2789327A (en) * 1954-09-21 1957-04-23 Burley W Corley Apparatus for continuous metal casting
US3128513A (en) * 1961-03-29 1964-04-14 Joseph W Charlton Moldless metal casting process
US3151366A (en) * 1957-12-11 1964-10-06 Howard A Fromson Method and apparatus for the casting of fusible materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE669725C (de) * 1939-01-16 Hugo Hahn Klappe zum UEberbruecken der Durchfalloeffnungen fuer die Kugeln von Geschicklichkeitsspielen
FR878023A (fr) * 1939-01-24 1943-01-08 Kohle Und Eisenforschung Gmbh Procédé de coulée continue de pièces
US2789327A (en) * 1954-09-21 1957-04-23 Burley W Corley Apparatus for continuous metal casting
US2754559A (en) * 1955-02-11 1956-07-17 Howard A Fromson Method for the casting of sheets of a fusible material
US3151366A (en) * 1957-12-11 1964-10-06 Howard A Fromson Method and apparatus for the casting of fusible materials
US3128513A (en) * 1961-03-29 1964-04-14 Joseph W Charlton Moldless metal casting process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658117A (en) * 1970-05-07 1972-04-25 Fromson H A Continuous metal casting method and apparatus
EP0013076A1 (en) * 1978-11-27 1980-07-09 Secretary of State for Industry in Her Britannic Majesty's Gov. of the United Kingdom of Great Britain and Northern Ireland Process and apparatus for producing metallic slurries
US4751959A (en) * 1984-12-27 1988-06-21 Sms Concast Inc. Method of and apparatus for continuously casting metals
US4765390A (en) * 1986-05-13 1988-08-23 Concast Service Union Ag Method of and arrangement for cooling a continuously cast strand

Also Published As

Publication number Publication date
CH511654A (fr) 1971-08-31
LU58913A1 (enrdf_load_stackoverflow) 1970-01-14
NL6909531A (enrdf_load_stackoverflow) 1970-12-22
BE734876A (enrdf_load_stackoverflow) 1969-11-22
AU5675869A (en) 1970-12-24
GB1266020A (enrdf_load_stackoverflow) 1972-03-08
DE1931206A1 (de) 1971-01-07
FR2050546A5 (enrdf_load_stackoverflow) 1971-04-02

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