EP0245722A2 - Procédé pour asperger des billettes - Google Patents

Procédé pour asperger des billettes Download PDF

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Publication number
EP0245722A2
EP0245722A2 EP87106338A EP87106338A EP0245722A2 EP 0245722 A2 EP0245722 A2 EP 0245722A2 EP 87106338 A EP87106338 A EP 87106338A EP 87106338 A EP87106338 A EP 87106338A EP 0245722 A2 EP0245722 A2 EP 0245722A2
Authority
EP
European Patent Office
Prior art keywords
spray
strand
nozzles
compartments
distance
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Withdrawn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
EP87106338A
Other languages
German (de)
English (en)
Other versions
EP0245722A3 (fr
Inventor
Arthur Vaterlaus
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.)
Concast Service Union AG
Original Assignee
Concast Service Union AG
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 Concast Service Union AG filed Critical Concast Service Union AG
Publication of EP0245722A2 publication Critical patent/EP0245722A2/fr
Publication of EP0245722A3 publication Critical patent/EP0245722A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • B22D11/1246—Nozzles; Spray heads

Definitions

  • the invention relates to a method and a device for spraying strands according to the preamble features of claim 1 and of claim 7.
  • the cast strand is cooled in a secondary cooling zone after leaving the mold by means of spray cooling.
  • spray cooling In order to produce a crack-free strand surface, certain requirements are placed on spray cooling with regard to uniformity, control range of the spray intensity, good adjustability to different slab widths, etc.
  • economic conditions such as low investment costs, low maintenance costs and also low susceptibility to failure must be met.
  • a cooling system for a secondary cooling section is known from DE-OS 2'401'263, which attempts to partially take into account the complex requirements mentioned.
  • cracks on the strand surface should be avoided by controlled cooling.
  • this cooling system is intended to make it possible to use it optimally regardless of the shape and dimensions of the slab strand.
  • the strand surface is arranged at a distance from several transverse to the strand running direction and in a gap between two successive support guide rollers F directed lachstrahlsprühfowner cooled.
  • the width of the spray compartments hitting the surface of the strand can be adjusted by means of adjustable covers between the spray nozzles and the strand. By means of a sieve, mesh or grid-like design of the covers, they can be made permeable to spray water, for example.
  • Such adjustable covers or screens require considerable mechanical effort, which must be readjusted manually or remotely when the slab width or steel quality changes.
  • Such covers and adjustment mechanisms can be repaired or destroyed after a short time by water vapor and by heat radiation, but also by strand breaks.
  • the invention has for its object to provide a method and an apparatus for cooling slab strands, which do not have the deficiencies mentioned.
  • the spray cooling should be optimally adapted to the needs when casting strands with different casting and strand parameters, such as casting speed, steel composition, strand width, etc.
  • the spraying method or the device should enable a large control range, require minimal maintenance by omitting any mechanically movable parts and be inexpensive to purchase.
  • the quality of the cast strands and, at the same time, the machine cooling should also be optimally adjustable by means of a finely adjustable spray performance and spray water distribution.
  • the Verei partial spray compartments Depending on the spray intensity of the spray compartments, also called the specific density of the coolant, the Verei partial spray compartments to achieve a total spray intensity that meets the specific needs of the system.
  • the spray intensity of the F lachstrahlsprühfowner a triangular purizingetz Mandel
  • a constant high spray intensity can be achieved in the central region of the slab and a spray intensity which essentially decreases continuously from the central region in the two edge regions.
  • the edges of the slab are deliberately cooled less.
  • Combined trapezoidal spray intensities can be achieved with two nozzles as well as with four nozzles, each with a triangular spray intensity and a nozzle spacing which corresponds to half the spray fan length.
  • the spray intensity or the specific amount of spray water can be regulated by pressure regulation.
  • nozzles with multiple spray compartments or with several nozzle or spray slots can be fed by two mutually independent water supply systems.
  • the one The water supply system can open into a central nozzle slot and the second water supply system can open into two outer nozzle slots of the common spray head that are parallel to the middle.
  • a water supply ratio between the middle and the two outer spray slots of the common spray head is advantageously chosen to be at least 1: 2.
  • a strand of slab 2 with a liquid core 3 is supported by support rollers 5.
  • the surface of the strand 2 is cooled on both sides with spray nozzles 4, 4 '.
  • the strand 2 is cooled by a multiple test fan 7 (vertical hatched area), which consists of one partial spray fan from each of the two nozzles 4, 4' by combining, ie mixing, the partial spray fans is formed.
  • a multiple test fan 7 vertical hatched area
  • the strand is cooled by one or more spray compartments of only one nozzle 4 or 4'.
  • the spray fan angle 8 measured in the plane of the spray fan length 10 is 60-130 degrees.
  • the spray intensity i.e. the amount of water sprayed or the amount of rain can be set within certain limits over the length 10, as shown in FIG. 3.
  • the length 10 of the spray compartments 6, 6 ' is plotted on the strand surface on the horizontal 12 and the spray intensity is shown on the vertical, which increases in the direction of the arrow 13.
  • the spray fan 6 (hatched vertically) and the spray fan 6 '(hatched horizontally) have the same triangular spray intensity.
  • the addition of the two triangular individual intensities results in a trapezoidal total intensity 15 if half of the spray fan length 10 overlap each other in the distance region A.
  • FIG. 4 shows an example with four nozzles with a triangular spray intensity and mutual overlaps of the entire spray compartments or half the length of the spray compartments.
  • Fig. 5 shows with a solid line 16 the trapezoidal spray intensity as the sum of both spray compartments 6, 6 'and with dashed line 17 the spray intensity as the sum of all four spray compartments 6, 6', 6 '', 6 '' '.
  • the trapezoidal shape is not straight, but is delimited with slightly curved lines, as indicated by the dot-dash line at 16 '.
  • FIG. 6 shows an example for casting two blooms 20, 20 'instead of a slab according to FIG. 4 for a cooling device according to FIG. 4. Only the nozzles 6 '', 6 '' 'are in operation.
  • 30 shows a nozzle body with three nozzle slots 31, 32, 32 * .
  • the nozzle body 30 is connected to two mutually independent water supply systems 33 and 34.
  • the water supply system 34 is connected to the middle nozzle slot 31. If the cooling intensity is low, it is sufficient to spray with the nozzle slot 31. If an approximately double cooling intensity is required, the water supply system 33 is switched on, which supplies water to the nozzle slots 32, 32 '. A further increase in cooling intensity is achieved when both water supply systems 33 and 34 are switched on and all three spray slots are sprayed.
  • the nozzle slots 31, 32, 32 ' are arranged in a common nozzle head in such a way that their spray compartments are united by a mutual suction effect after a few centimeters from the nozzle slot.
  • the distance between the parallel nozzle slots is usually 10 - 20 mm, maximum 30 - 40 mm.
  • Both water supply systems are equipped with a pressure regulating device, so that the work can be carried out essentially continuously between a minimum and a maximum
  • Fig. 3 three different spray intensities are Darge provides, which can be generated for example with the nozzle body 30.
  • the spray intensity is shown with a dashed line with a nozzle slot, with a dash-dotted line one with two nozzle slots and with a solid line one with three nozzle slots.
  • the water supply ratio between the middle and the two outer nozzle slots 31 and 32, 32 'of the common spray head is at least 1: 2.
  • the spray compartments can be created using single-component water or dual-component air-water spray nozzles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP87106338A 1986-05-13 1987-05-02 Procédé pour asperger des billettes Withdrawn EP0245722A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1931/86 1986-05-13
CH193186 1986-05-13

Publications (2)

Publication Number Publication Date
EP0245722A2 true EP0245722A2 (fr) 1987-11-19
EP0245722A3 EP0245722A3 (fr) 1988-03-02

Family

ID=4221940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106338A Withdrawn EP0245722A3 (fr) 1986-05-13 1987-05-02 Procédé pour asperger des billettes

Country Status (3)

Country Link
US (1) US4765390A (fr)
EP (1) EP0245722A3 (fr)
JP (1) JPS6326248A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6264767B1 (en) 1995-06-07 2001-07-24 Ipsco Enterprises Inc. Method of producing martensite-or bainite-rich steel using steckel mill and controlled cooling
CA2332933C (fr) 1998-07-10 2007-11-06 Ipsco Inc. Procede et appareil de production d'acier riche en martensite ou bainite au moyen d'un laminoir de type steckel et de refroidissement regule
US8562766B2 (en) 2006-02-27 2013-10-22 Nucor Corporation Method for making a low surface roughness cast strip
US20070199627A1 (en) * 2006-02-27 2007-08-30 Blejde Walter N Low surface roughness cast strip and method and apparatus for making the same
US7451804B2 (en) * 2006-11-22 2008-11-18 Peterson Oren V Method and apparatus for horizontal continuous metal casting in a sealed table caster
US8091388B2 (en) * 2006-12-28 2012-01-10 Owens Corning Intellectual Capital, Llc Cooling ring for use in manufacturing of fiberglass wool
CN109666781B (zh) * 2018-12-11 2020-12-01 河北利镔通用设备有限公司 一种篦条的散热处理工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3468361A (en) * 1966-11-22 1969-09-23 Fromson H A Continuous metal casting method
US3499456A (en) * 1967-06-05 1970-03-10 Marotta Valve Corp Fluid flow control system
CH505659A (de) * 1969-04-15 1971-04-15 Concast Ag Verfahren zum Kühlen von Knüppeln beim Stranggiessen
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
DE2401263A1 (de) * 1974-01-11 1975-07-24 Sack Gmbh Maschf Kuehlsystem fuer die sekundaerkuehlstrecke einer stranggiessanlage
JPS6068147A (ja) * 1983-09-24 1985-04-18 Nippon Steel Corp 多条連続鋳造鋳片の二次冷却方法

Also Published As

Publication number Publication date
JPS6326248A (ja) 1988-02-03
EP0245722A3 (fr) 1988-03-02
US4765390A (en) 1988-08-23

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