EP0241445B1 - Verfahren und Vorrichtung zum Kühlen von Strangguss aus Metall - Google Patents

Verfahren und Vorrichtung zum Kühlen von Strangguss aus Metall Download PDF

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Publication number
EP0241445B1
EP0241445B1 EP87870033A EP87870033A EP0241445B1 EP 0241445 B1 EP0241445 B1 EP 0241445B1 EP 87870033 A EP87870033 A EP 87870033A EP 87870033 A EP87870033 A EP 87870033A EP 0241445 B1 EP0241445 B1 EP 0241445B1
Authority
EP
European Patent Office
Prior art keywords
metal product
cooling
product
front wall
box
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
Application number
EP87870033A
Other languages
English (en)
French (fr)
Other versions
EP0241445A1 (de
Inventor
Paul Naveau
Stéphan Wilmotte
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Priority to AT87870033T priority Critical patent/ATE47061T1/de
Publication of EP0241445A1 publication Critical patent/EP0241445A1/de
Application granted granted Critical
Publication of EP0241445B1 publication Critical patent/EP0241445B1/de
Expired 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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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 device for cooling a metallic product, in particular steel, which is continuously cast, and to a method of using this device according to the preambles of claims 1 and 7.
  • the continuous casting of a metal product is a method which consists in casting the molten metal in a bottomless ingot mold generally animated by an oscillating movement and whose walls are cooled vigorously. Under the effect of this vigorous cooling, the skin of the cast metal solidifies rapidly and forms a solid crust surrounding the molten metal which forms the liquid well. The partly solidified product is then continuously extracted from the mold and it passes through a secondary cooling zone where it completes its cooling and therefore solidifies.
  • the presence of the liquid well causes the existence of a ferrostatic pressure inside the product.
  • This ferrostatic pressure acts from the inside on the solidified skin and it can give rise to breakthroughs, that is to say tears in the skin, in places where the skin does not offer sufficient resistance.
  • Such weak points result in particular from irregular cooling or insufficient support of the product in the secondary cooling zone.
  • Conventional equipment in a secondary cooling zone consists of support and guide rollers, between which are devices for spraying water, for example sprinklers.
  • Patent DE-C-21 43 962 describes a device for cooling and guiding a continuously cast product, comprising a grid in the meshes of which are arranged sprinklers.
  • the grid is applied against the solidified side face of the product which it guides.
  • the cooling obtained is not uniform over the entire surface.
  • the patent FR-A 2 317 980 on which the preamble of claim 1 is based, discloses a device comprising a box which surrounds the metal product and the inner wall of which is pierced with numerous orifices for spraying a coolant. . Maintenance of the cast product is ensured by mechanical means.
  • the present invention reveals a device making it possible to remedy the aforementioned drawbacks and to ensure intense and homogeneous cooling of the entire surface of the product while guaranteeing an integral support of the product in the secondary cooling zone.
  • the device for cooling a continuously cast metal product which consists of at least one box comprising a flat wall pierced with orifices, called the front wall, and equipped with means for supplying pressurized coolant, each box being disposed in the secondary cooling zone of said metal product so that its front wall faces a face of the metal product, at a certain distance from it, is characterized in that said front wall of said boxes is inclined at an angle between 0 ° and 1 ° relative to the transverse median plane of the metal product to be cooled, so that the distance between said front wall and the corresponding face of the metal product increases in the direction scrolling of said product.
  • the transverse median plane of the product is the vertical plane carried out at mid-thickness of the product parallel to the large faces of the latter.
  • the orifices are slots oriented transversely relative to the product when the box is placed in the secondary cooling zone.
  • these slots are inclined, in the direction of travel of the metallic product, by an angle a between 20 ° and 70 ° relative to the horizontal.
  • this angle a will be close to 60 ° , in order to give the liquid a sufficient movement component in the direction of movement of the metal product.
  • the section of said orifices, and in particular the width of the slots, is adjustable by suitable means.
  • the orifices are regularly distributed in the front wall of the box, in order to ensure a homogeneous distribution of the coolant.
  • FIG. 1 schematically represents and without any limiting character, a device for cooling a steel slab continuously cast.
  • the slab 1 leaving the continuous casting ingot mold 2 enters the secondary cooling zone where the device of the invention is installed generally designated by the reference 3.
  • This device consists of two boxes 4.5 which each have a flat front wall 6, 7 facing the slab 1.
  • the two boxes 4,5 are arranged at a distance as small as possible from the mold. However, if this distance allows, there may be provided, between the mold and the boxes, support rollers known per se, not shown.
  • the two boxes 4,5 are arranged opposite the large faces of the slab 1, at the same level and in such a way that their respective flat walls 6,7 are inclined on the median plane of the slab. This inclination is accentuated here to make it perceptible but in practice, it does not exceed 1 ° .
  • These slots 9, 10 have an adjustable width e.
  • the boxes 4.5 also include means 11, 12 for supplying coolant, as well as flow meters 13, 14 for controlling the flow of liquid and manometers 15, 16 for monitoring the pressure prevailing inside the boxes.
  • the steel slab 1 When the steel slab 1 leaves the continuous casting mold 2, it has a relatively thin solidified skin surrounding the liquid well 8.
  • the boxes 4,5 are supplied with pressurized water respectively by the pipes 11, 12 and this water s 'flows through the slots 9, 10 to fill the space formed between the boxes 4 and 5.
  • the slab 1 entering this space is subjected to the action of the coolant, generally water, which circulates there. It thus undergoes intense and homogeneous cooling which results in the rapid solidification of the metal of the liquid well and consequently the increase in the thickness of the solidified skin. Care should be taken to ensure a sufficient flow of coolant to limit the heating of this coolant and in any case avoid its boiling, as this would cause the rise of water vapor towards the mold.
  • the slab In this space between the boxes, the slab is not in contact with any support member. It is only subjected to the action of the pressurized coolant which, in addition to its cooling effect, also provides compensation for the ferrostatic pressure applied by the metal of the liquid well. As the pressure exerted by the coolant layer is applied uniformly over the entire surface of the slab, the ferrostatic pressure is compensated at all points and there is no longer any risk of breakthrough.
  • FIG. 2 illustrates the distribution of the pressure P exerted on the surface of the slab along the height H of the boxes, for different flow rates of coolant.
  • the device and the method of the invention therefore make it possible to ensure rapid and homogeneous cooling of a continuously cast metal product, as well as the continuous support of this product throughout the duration of its solidification.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (7)

1. Vorrichtung zur Kühlung eines stranggegossenen Metallproduktes (1), die aus mindestens einem Kasten (4; 5) besteht, wobei dieser eine ebene, von Öffnungen (9; 10) durchlöcherte Wand (6; 7), die als vorwärtige Wand bezeichnet wird, umfaßt, und mit Zufuhrmittefn (11; 12) für unter Druck stehende Kühlflüssigkeit ausgerüstet ist, wobei jeder Kasten so in der sekundären Kühlzone des Metallproduktes (1) angeordnet ist, daß seine vorwärtige Wand einer Fläche des Metallproduktes in einem gewissen Abstand zugewandt ist, dadurch gekennzeichnet, daß die vorwärtige Wand (6; 7) jener Kästen (4; 5) in einem Winkel von zwischen 0° und 1° bezüglich der mittleren Querebene des zu kühlenden Metallproduktes (1) so geneigt ist, daß der Abstand zwischen der vorwärtigen Wand (6; 7) und der entsprechenden Fläche des Metallproduktes in Richtung des Vorbeilaufs des Produktes (1) zunimmt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnungen quer zum Produkt ausgerichtete Schlitze (9; 10) sind, wenn der Kasten (4; 5) in der sekundären Kühlzone in Stellung gebracht wird.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Schlitze (9; 10) in Richtung des Vorbeilaufs des Metallproduktes in einem Winkel a von zwischen 20° und 70° bezüglich der Horizontalen geneigt sind.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Neigungswinkel a der Schlitze (9; 10) ca. 60° beträgt.
5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie Mittel zur Regulierung des Querschnitts jener Öffnungen, besonders der Weite (e) der Schlitze (9; 10), beinhaltet.
6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jene Öffnungen, bzw. jene Schlitze, regelmäßig in der vowärtigen Wand des Kastens verteilt sind.
7. Verfahren zur Kühlung eines stranggegossenen Metallproduktes mit Hilfe einer nach einem der vorhergehenden Ansprüche aus mindestens einem Kasten (4; 5) bestehenden Vorrichtung, in der man dem Kasten unter Druck stehende Kühlflüssigkeit zuführt und sicherstellt, daß die Kühlflüssigkeit über die in der vorwärtigen Wand (6; 7) jener Kisten eingelassenen Öffnungen (9; 10) fließt, so daß sich zwischen dem Metallprodukt (1) und jener vorwärtigen Wand (6; 7) eine durchgehende Schicht unter Druck stehender Kühlflüssigkeit bildet, die in Richtung des Vorbeilaufs des Metallproduktes fließt, dadurch gekennzeichnet, daß man eine sich in Richtung des Vorbeilaufs des Metallproduktes verdickende, durchgehende Kühlflüssigkeitsschicht bildet und daß man den Druck in jener sich verdickenden Schicht so reguliert, daß der im Metallprodukt herrschende ferrostatische Druck überall ausgeglichen wird.
EP87870033A 1986-03-18 1987-03-09 Verfahren und Vorrichtung zum Kühlen von Strangguss aus Metall Expired EP0241445B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87870033T ATE47061T1 (de) 1986-03-18 1987-03-09 Verfahren und vorrichtung zum kuehlen von strangguss aus metall.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE648206 1986-03-18
BE6048206 1986-03-18

Publications (2)

Publication Number Publication Date
EP0241445A1 EP0241445A1 (de) 1987-10-14
EP0241445B1 true EP0241445B1 (de) 1989-10-11

Family

ID=25662181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87870033A Expired EP0241445B1 (de) 1986-03-18 1987-03-09 Verfahren und Vorrichtung zum Kühlen von Strangguss aus Metall

Country Status (5)

Country Link
US (1) US4751960A (de)
EP (1) EP0241445B1 (de)
JP (1) JPH0783918B2 (de)
AT (1) ATE47061T1 (de)
ES (1) ES2011824B3 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1002826A6 (fr) * 1989-02-10 1991-06-25 Centre Rech Metallurgique Procede de fabrication d'une brame mince en acier par coulee continue.
JPH0638604Y2 (ja) * 1989-04-13 1994-10-12 住友金属工業株式会社 連続鋳造機における鋳片支持冷却装置
JP2721281B2 (ja) * 1991-09-19 1998-03-04 ワイケイケイ株式会社 連続鋳造の冷却方法及び鋳型
DE69431178T3 (de) * 1993-10-29 2014-03-20 Danieli & C. Officine Meccaniche S.P.A. Verfahren zur thermischen Oberflächenbehandlung eines Stranges
US7451804B2 (en) * 2006-11-22 2008-11-18 Peterson Oren V Method and apparatus for horizontal continuous metal casting in a sealed table caster
WO2018055918A1 (ja) * 2016-09-23 2018-03-29 新日鐵住金株式会社 熱延鋼板の冷却装置及び冷却方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB702687A (en) * 1950-06-12 1954-01-20 Boehler & Co Ag Geb Improvements in and relating to the cooling of ingots in the continuous casting of high-melting metals
FR67701E (fr) * 1955-03-18 1958-03-18 Pechiney Coulée des métaux
GB1112017A (en) * 1965-01-21 1968-05-01 Concast Ag Improvements in cooling hot metal,particularly in continuous casting
US3512574A (en) * 1966-12-02 1970-05-19 Inland Steel Co Continuous casting process and apparatus
DE1558302A1 (de) * 1967-01-02 1970-04-23 Schloemann Ag Vorrichtung zur Fuehrung von aus Stranggiesskokillen austretenden Metallstraengen
DE2143962C3 (de) * 1971-09-02 1975-09-04 Concast Ag, Zuerich (Schweiz) Verfahren und Vorrichtung zum Kühlen mittels Sprühdüsen und Führen eines Stranges in der Sekundärkühlzone einer Stranggießanlage
FR2153152A1 (en) * 1971-09-21 1973-05-04 Creusot Loire Continuous casting curved cooling guide - improves casting quality by supporting it on pressurised fluid and rollers
CH577352A5 (de) * 1975-02-28 1976-07-15 Concast Ag
IT1070350B (it) * 1975-07-18 1985-03-29 Centre Rech Metallurgique Perfezionamenti ai procedimenti di colata continua dei metalli
JPS5716250U (de) * 1980-07-01 1982-01-27
JPS59189052A (ja) * 1983-04-11 1984-10-26 Mitsubishi Heavy Ind Ltd 気水冷却用マニホルド

Also Published As

Publication number Publication date
JPH0783918B2 (ja) 1995-09-13
ES2011824B3 (es) 1990-02-16
JPS62227562A (ja) 1987-10-06
EP0241445A1 (de) 1987-10-14
ATE47061T1 (de) 1989-10-15
US4751960A (en) 1988-06-21

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