US3612152A - Billet cooling method for continuous casting - Google Patents

Billet cooling method for continuous casting Download PDF

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Publication number
US3612152A
US3612152A US29834A US3612152DA US3612152A US 3612152 A US3612152 A US 3612152A US 29834 A US29834 A US 29834A US 3612152D A US3612152D A US 3612152DA US 3612152 A US3612152 A US 3612152A
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Prior art keywords
nozzles
casting
spray
sprayed
edge regions
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Expired - Lifetime
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US29834A
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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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    • 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

Definitions

  • the present invention relates to a method of cooling a continuous casting issuing from a continuous casting mold, particularly a steel casting.
  • a principal object of the present invention is to provide a method of cooling billets with atomizing nozzles whereby high casting speeds can be obtained, the development of longitudinal comer cracks, and hence the risk of breakouts, can be diminished, and rhombic distortion can be reduced sufficiently to prevent inconvenience during further processing.
  • a method of cooling a continuous casting of polygonal cross section issuing from a continuous casting mold, which comprises spraying the surface of the casting directly as it leaves the mold with a coolant liquid sprayed through atomizing nozzles, wherein the region on each side of the billet adjacent the edges are sprayed by nozzles having a relatively high average delivery per unit area and an approximately rectangular spray pattern, and the surface between the edge regions is sprayed by nozzles of relatively lower average delivery and a spray delivery characteristic that decreases towards the edge regions.
  • This method permits higher casting rates to be employed. Despite this increase the casting requires no direct guide means immediately after leaving the mold, so that the entire surface can be sprayed without being masked.
  • the nozzles spraying the edge regions should spray strips that are between l0 and 25 mm. wide on both sides of the edge.
  • the rectangular spray pattern is preferably produced by flat-type spray nozzles.
  • the rectangular spray pattern covering two edge regions having a common edge may be generated by two narrow sprays issuing from a common nozzle body, said nozzle body being located on a line bisecting the corner angle.
  • FIG. 1 is a side view of part of a continuous casting plant in which the casting is cooled in accordance with the invention, showing the casting issuing from the mold;
  • FIG. 2 illustrates the spray delivery characteristics of the nozzles, distributed around the periphery of the casting
  • FIG. 3 illustrates the spray delivery characteristics in the longitudinal direction of the casting of a flat-type spray nozzle
  • FIG. 4 is a longitudinal section through a nozzle body of a flat-type nozzle for the generation of two narrow sprays
  • FIG. 5 is an end view of the nozzle body of FIG. 4.
  • FIG. 6 illustrates the spray delivery characteristics of the nozzles distributed around the periphery of the casting when using the flat-type nozzles shown in FIGS. 4 and 5.
  • FIG. 1 is a side view of a continuous steel casting 2 of generally polygonal cross section issuing from a continuous casting mold l.
  • a coolant liquid suitably water
  • the sprayed area of the billet surface is indicated by the cross-hatched outlines.
  • the edge regions 3 on the side of the billet 2 are sprayed by two flat-type atomizing nozzles.
  • the base of the spray pattern, i.e., the sprayed surface is roughly rectangular, across the casting the base is narrow, whereas in the longitudinal direction it is wide.
  • the elongated orifice of the nozzle body therefore extends parallel to the longitudinal casting axis.
  • FIG. 3 shows the spray delivery characteristic of such a flattype nozzle in the lengthwise direction of the casting. In the direction of the arrow 7 the relative quantity of water delivered is shown. In the illustrated example the delivery characteristic is an ogival. However, other delivery characteristics such as a flat characteristic could be used.
  • An edge region 3 which is sprayed at an average rate of about 0.45 liters/sq. cm./minute at a water pressure of 4 atm. gauge has been found, for a steel casting having the analysis 0.44% C, 0.33% Si and 0.95% Mn and a square cross section of 1 15 X1 15 mm., to be quite sufficient for increasing the casting rate from 2.5 to 3.5 meters/minute.
  • the distance 4 between the adjoining side of the casting and the sprayed surface, in the case of the described casting, was about 2 mm. and the length 5 of the short side of the narrow base was about 14 mm. The length 6 of the longer side of the base was about 18 cms. The sprayed area was thus 25 sq. cm.
  • the nozzles spraying the edge regions are preferably arranged to spray regions 3 extending from the edge a distance of 10 to 25 mm. across each side.
  • FIG. 2 illustrates the spray delivery characteristics and indirectly the cooling efi'ects of the nozzles around the circumference of the casting.
  • the flat-type nozzles spraying the edge regions 3 provide a roughly rectangular spray pattern 8 across the casting.
  • the nozzle which cools the surface of the billet 2 between the edge regions 3 sprays an approximately square area 9, i.e., the spray pattern of the nozzle has a square base.
  • FIG. 2 shows that this nozzle produces an ogival delivery characteristic 10. Its average spraying performance in the described example was about 0.08 liters/sq. cm./minute. Since the delivery characteristic of this nozzle decreases towards the edge regions the difference in spraying performance in the areas of contact with the flat-type nozzles is a multiple.
  • the surface 9 is exposed to a lower average spray delivery per unit'area than the edge regions 3.
  • a nozzle having a spray pattern with a square base it would also be possible to use for instance several flat-type nozzles, each with a flat delivery characteristic, but the cost of providing such nozzles would be greater.
  • the rectangular spray pattern may be generated by two narrow sprays issuing from a common nozzle body of a flat-type nozzle situated on the line bisecting the comer angle at the edge.
  • FIGS. 4 and 5 illustrates the spray characteristic of the nozzles of FIGS. 4 and 5 around the periphery of the casting 2.
  • the area of the spray pattern 20 across the casting is roughly twice the size of the area 3.
  • the sprayed regions on each side of the edges are roughly of the same size as in FIG. 2 but the cooling effect of the nozzle on an edge is slightly less than that of two flat-type nozzles perpendicularly facing the two sides as in FIGS. 1 and 2.
  • a method of cooling a continuous casting of polygonal cross section issuing from a continuous casting mold, which comprises spraying the surface of the casting directly after it leaves the mold with a'coolant liquid sprayed through atomizing nozzles, wherein the regions on each side of the casting adjacent the edges are sprayed by nozzles having a relatively high-average delivery per unit area and an approximately rectangular spray pattern, and the surface between the edge regions is sprayed by nozzles of relatively lower average delivery and a spray delivery characteristic that decreases towards the edge regions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US29834A 1969-04-15 1970-04-20 Billet cooling method for continuous casting Expired - Lifetime US3612152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH564769A CH505659A (de) 1969-04-15 1969-04-15 Verfahren zum Kühlen von Knüppeln beim Stranggiessen

Publications (1)

Publication Number Publication Date
US3612152A true US3612152A (en) 1971-10-12

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US29834A Expired - Lifetime US3612152A (en) 1969-04-15 1970-04-20 Billet cooling method for continuous casting

Country Status (7)

Country Link
US (1) US3612152A (xx)
AT (1) AT300233B (xx)
BE (1) BE748910A (xx)
CH (1) CH505659A (xx)
ES (1) ES378888A1 (xx)
FR (1) FR2039189B1 (xx)
GB (1) GB1269895A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766968A (en) * 1971-04-30 1973-10-23 Voest Ag Continuous casting plant for slabs
US3877510A (en) * 1973-01-16 1975-04-15 Concast Inc Apparatus for cooling a continuously cast strand incorporating coolant spray nozzles providing controlled spray pattern
US3890167A (en) * 1973-09-07 1975-06-17 Kobe Steel Ltd Method and apparatus for producing a casting having a satisfactory surface with a continuous casting operation
US3895428A (en) * 1972-10-17 1975-07-22 Metallurgie Hoboken Continuous casting of metal rods and bars

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245722A3 (de) * 1986-05-13 1988-03-02 Concast Service Union Ag Verfahren zum Besprühen von Strängen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1117267B (de) * 1952-10-23 1961-11-16 Babcock & Wilcox Co Vorrichtung zum kontinuierlichen Stranggiessen von Metall
CH412214A (de) * 1961-09-13 1966-04-30 Concast Ag Verfahren und Vorrichtung zum Kühlen von Stranggussmaterial
US3468362A (en) * 1966-05-31 1969-09-23 Concast Ag Method of cooling cast members from a continuous casting operation
US3499456A (en) * 1967-06-05 1970-03-10 Marotta Valve Corp Fluid flow control system
US3515202A (en) * 1966-08-20 1970-06-02 Paderwerk Gebr Benteler Schlos Method for continuous casting of metal ingots

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1117267B (de) * 1952-10-23 1961-11-16 Babcock & Wilcox Co Vorrichtung zum kontinuierlichen Stranggiessen von Metall
CH412214A (de) * 1961-09-13 1966-04-30 Concast Ag Verfahren und Vorrichtung zum Kühlen von Stranggussmaterial
US3468362A (en) * 1966-05-31 1969-09-23 Concast Ag Method of cooling cast members from a continuous casting operation
US3515202A (en) * 1966-08-20 1970-06-02 Paderwerk Gebr Benteler Schlos Method for continuous casting of metal ingots
US3499456A (en) * 1967-06-05 1970-03-10 Marotta Valve Corp Fluid flow control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766968A (en) * 1971-04-30 1973-10-23 Voest Ag Continuous casting plant for slabs
US3895428A (en) * 1972-10-17 1975-07-22 Metallurgie Hoboken Continuous casting of metal rods and bars
US3877510A (en) * 1973-01-16 1975-04-15 Concast Inc Apparatus for cooling a continuously cast strand incorporating coolant spray nozzles providing controlled spray pattern
US3890167A (en) * 1973-09-07 1975-06-17 Kobe Steel Ltd Method and apparatus for producing a casting having a satisfactory surface with a continuous casting operation

Also Published As

Publication number Publication date
AT300233B (de) 1972-07-25
FR2039189B1 (xx) 1974-05-24
FR2039189A1 (xx) 1971-01-15
CH505659A (de) 1971-04-15
BE748910A (fr) 1970-09-16
GB1269895A (en) 1972-04-06
ES378888A1 (es) 1972-07-16
DE2017393A1 (de) 1970-10-22

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