US3899018A - Method of casting steel into a continuous casting mold and pouring tube for the performance of the aforesaid method - Google Patents

Method of casting steel into a continuous casting mold and pouring tube for the performance of the aforesaid method Download PDF

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Publication number
US3899018A
US3899018A US348850A US34885073A US3899018A US 3899018 A US3899018 A US 3899018A US 348850 A US348850 A US 348850A US 34885073 A US34885073 A US 34885073A US 3899018 A US3899018 A US 3899018A
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United States
Prior art keywords
mold
steel
slot
strand
pouring tube
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Expired - Lifetime
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US348850A
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English (en)
Inventor
Peter J Koenig
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SMS Concast AG
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Concast AG
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Publication date
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Publication of US3899018A publication Critical patent/US3899018A/en
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    • 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 present invention relates to a new and improved method of pouring metal, typically steel, into a continuous casting mold, wherein the steel is conducted to a point beneath the level of the liquid metal bath or pool in the mold, and also relates to a new and improved construction of pouring tube for the performance of the aforesaid method.
  • the outlet opening in the immersed pouring tube can possess different crosssectional configurations, for instance can be oval, round or rectangular.
  • a further object of the present invention is to insure for as great as possible undisturbed incipient growth of the frozen layer or shell at the upper portion of the mold, that is to say, at the region of the level of the molten bath in the mold and to promote circulation at the deeper locations of the liquid metal pool in the mold.
  • Yet a further significant object of the present invention relates to an improved method of, and pouring tube for, the pouring of molten metals into a continuous casting mold which produces a surface and skin at the cast product which is as free as possible of fissures and reduces the possibility of segregation processes from arising during casting.
  • the method aspects of this development contemplate that the molten steel during its outflow or departure in the form of a thin, coherent. or bundled-together pattern is introduced into the liquid metal pool in the mold simultaneously downwards as well as also laterally.
  • the pouring tube which is employed for the practice of the methodaspects is manifested by the features that it possesses an outlet opening having the shape of a slot which opens downwardly and laterally.
  • the superheated steel is uniformly distributed within as large as possible volume of the liquid core of the strand in the mold.
  • the shell or skin of the strand can uniformly grow.
  • the strand shell or skin is subjected to a lesser degree to thermal stresses, reducing the tendency to form fissures.
  • the pattern during departure of the steel is retained in a plane inclined towards the inner radius of the strand at an angle with respect to a vertical plane. Owing to this inclination there is insured that the superheated or overheated steel does not come into contact with, or only comes into contact as late as possible with, the solidified wide sides of the strand. Furthermore, the central plane of the pattern advantageously should not approach the surface of the slab at the location of the inner radius closer than about one-quarter of the slab thickness.
  • the width of the slot advantageously'does not exceed 25 millimeters, so that the outflowingpattern is relatively narrow.
  • the length of the slot is designed to be advantageously about seven to nine times that of the slot width.
  • FIG. 1 illustrates a mold with a pouring tube immersed in the liquid metal pool or bath in the mold and designed according to the teachings of the" present invention
  • FIG. 2 is a cross-sectional view of the arrangement of FIG. 1, taken substantially along the line II-II thereof;
  • FIG. 3 illustrates a mold and pouring tube having an inclined slot.
  • FIG. I there is illustrated, by way of example, a rectangular continuous casting mold 1 into which there is infed a molten jet of steel, delivered from a non-depicted casting vessel, for instance a tundish, by means of a pouring tube 2.
  • This pouring tube 2 immerses into the liquid metal pool or core 3 of the strand which is being formed in the continuous casting mold 1.
  • a slag layer 5 At the top of the metal pool 4 there is a slag layer 5.
  • a solidified layer or shell 6 having a thickness which increases in the direction of throughpassage of the strand.
  • the pouring tube 2 possesses an outflow or discharge opening in the form of a slot 8, this slot 8 being extended upwardly over a longer distance along the wall of the pouring tube 2.
  • the steel is introduced into the liquid metal pool 3 in the mold 1 through this slot 8 in the form of an emerging thin, coherent or bunched-together pattern, wherein the steel departs from the pouring tube both laterally as well as downwardly, as indicated by the flow lines 7 of FIG. 1.
  • the central plane 9 of the slot 8, which is vertical in this exemplary embodiment, is located in a vertical plane 11 which extends through the center of the narrow sides of the continuous casting mold 1.
  • This inclination of the slot 8' insures that the superheated steel comes into contact as late as possible with the solidified wide sides of the strand at the outer radius thereof, and will be deflected towards the side of the inner radius, and further, will produce a circulatory movement which penetrates deeply into the pool in the mold, this circulatory movement then reducing segregation effects.
  • the minimum spacing 16 of the central plane 9' from the wide side of the strand at the inner radius should be adjusted to be not less than approximately one-quarter of the thickness D of the slab.
  • the angle of inclination 12 advantageously is in a range between 4 and 6.
  • the inclination of the inflowing pattern also can be adjusted if the pouring tube with vertical oriented slot (FIG. 2) is secured in inclined position to the casting vessel.
  • the width 14 of the slots 8 and 8' respectively should be slight and advantageously should amount to no more than 25 millimeters.
  • the length 15 of each such slot preferably should amount to about seven to nine times the width 14.
  • the flow cross-section of the vertical bore 18 of the pouring tube is tapered following the start of the slot in the direction of flow. A similar effect also could be attained by providing different slot widths.
  • a pouring tube for pouring steel into a continuous casting mold to form a cast strand, said pouring tube having at least one outlet means capable of opening into the liquid metal pool of the mold for introducing liquid metal into the mold in the form of a thin, coherent pattern, said outlet means having the shape of a downwardly and laterally opening slot of constant width, the width of the slot not exceeding 25 millimeters and the length of the slot being about seven to nine times the slot width.
  • a method of pouring steel into a continuous casting mold comprising the steps of conducting the steel to a point beneath the level of the liquid metal pool in the mold, introducing the steel into the mold in the form of a thin, coherent pattern which is directed simultaneously both downwardly as well as laterally into the liquid metal pool in the mold, and directing the pattern, upon outflow of the steel, towards the inner radius of the curved strand in a plane which is inclined at a predetermined angle with regard to a vertical plane.
  • a pouring tube for pouring steel into a continuous casting mold to form a cast strand, said ,pouring tube having at least one outlet opening capable of opening into the liquid metal pool of the mold, said outlet opening possessing the shape of a downwardly and laterally opening slot, and wherein the slot is inclined towards the inner radius of the cast strand in the direction of travel of such strand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US348850A 1972-04-14 1973-04-06 Method of casting steel into a continuous casting mold and pouring tube for the performance of the aforesaid method Expired - Lifetime US3899018A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH555472 1972-04-14

Publications (1)

Publication Number Publication Date
US3899018A true US3899018A (en) 1975-08-12

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ID=4295523

Family Applications (1)

Application Number Title Priority Date Filing Date
US348850A Expired - Lifetime US3899018A (en) 1972-04-14 1973-04-06 Method of casting steel into a continuous casting mold and pouring tube for the performance of the aforesaid method

Country Status (9)

Country Link
US (1) US3899018A (enrdf_load_stackoverflow)
JP (1) JPS5248086Y2 (enrdf_load_stackoverflow)
BE (1) BE798212A (enrdf_load_stackoverflow)
CA (1) CA978325A (enrdf_load_stackoverflow)
CH (1) CH547135A (enrdf_load_stackoverflow)
DE (1) DE2318639C3 (enrdf_load_stackoverflow)
FR (1) FR2180106B1 (enrdf_load_stackoverflow)
GB (1) GB1433173A (enrdf_load_stackoverflow)
ZA (1) ZA732575B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006772A (en) * 1973-06-22 1977-02-08 Concast Ag Method and apparatus for casting steel into a continuous casting mold
US5866022A (en) * 1997-03-24 1999-02-02 North American Refractories Company Refractory pour tube with cast plate
US20030203117A1 (en) * 2002-04-26 2003-10-30 Degussa Ag Process for impregnating porous mineral substrates

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612098B3 (fr) * 1987-03-19 1989-10-27 Danieli Off Mecc Systeme de coulee continue pour l'obtention de brames minces
JPH0358402U (enrdf_load_stackoverflow) * 1989-10-13 1991-06-06
DE19722890A1 (de) * 1997-05-28 1998-12-03 Mannesmann Ag Tauchausguß

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1063913A (en) * 1912-02-12 1913-06-03 Benjamin L Cornelius Oil-burner.
US1613336A (en) * 1924-08-07 1927-01-04 Walter Van E Thompson Lawn sprinkler
US2938251A (en) * 1956-08-27 1960-05-31 American Smelting Refining Metal distribution for continuous casting
US3459346A (en) * 1966-10-18 1969-08-05 Metacon Ag Molten metal pouring spout
US3536122A (en) * 1966-09-23 1970-10-27 Concast Ag Method of producing steel bars by continuous casting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1063913A (en) * 1912-02-12 1913-06-03 Benjamin L Cornelius Oil-burner.
US1613336A (en) * 1924-08-07 1927-01-04 Walter Van E Thompson Lawn sprinkler
US2938251A (en) * 1956-08-27 1960-05-31 American Smelting Refining Metal distribution for continuous casting
US3536122A (en) * 1966-09-23 1970-10-27 Concast Ag Method of producing steel bars by continuous casting
US3459346A (en) * 1966-10-18 1969-08-05 Metacon Ag Molten metal pouring spout

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006772A (en) * 1973-06-22 1977-02-08 Concast Ag Method and apparatus for casting steel into a continuous casting mold
US5866022A (en) * 1997-03-24 1999-02-02 North American Refractories Company Refractory pour tube with cast plate
US20030203117A1 (en) * 2002-04-26 2003-10-30 Degussa Ag Process for impregnating porous mineral substrates
US7611753B2 (en) * 2002-04-26 2009-11-03 Degussa Ag Process for impregnating porous mineral substrates

Also Published As

Publication number Publication date
CA978325A (en) 1975-11-25
FR2180106A1 (enrdf_load_stackoverflow) 1973-11-23
FR2180106B1 (enrdf_load_stackoverflow) 1976-09-10
JPS4929113U (enrdf_load_stackoverflow) 1974-03-13
DE2318639A1 (de) 1973-10-18
CH547135A (de) 1974-03-29
GB1433173A (en) 1976-04-22
DE2318639B2 (de) 1975-04-30
BE798212A (fr) 1973-07-31
ZA732575B (en) 1974-03-27
JPS5248086Y2 (enrdf_load_stackoverflow) 1977-11-01
DE2318639C3 (de) 1975-12-04

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