EP0010314A1 - Dispositif pour le refroidissement d'une barre dans une installation de coulée continue d'acier - Google Patents

Dispositif pour le refroidissement d'une barre dans une installation de coulée continue d'acier Download PDF

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Publication number
EP0010314A1
EP0010314A1 EP79104085A EP79104085A EP0010314A1 EP 0010314 A1 EP0010314 A1 EP 0010314A1 EP 79104085 A EP79104085 A EP 79104085A EP 79104085 A EP79104085 A EP 79104085A EP 0010314 A1 EP0010314 A1 EP 0010314A1
Authority
EP
European Patent Office
Prior art keywords
strand
stirrer
cooling
coolant
spray
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Withdrawn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
EP79104085A
Other languages
German (de)
English (en)
Inventor
Markus Schmid
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.)
SMS Concast AG
Original Assignee
Concast Holding AG
Concast 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 Holding AG, Concast AG filed Critical Concast Holding AG
Publication of EP0010314A1 publication Critical patent/EP0010314A1/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Withdrawn legal-status Critical Current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
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
    • 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 invention relates to a device for cooling a strand in a continuous casting plant for steel with an electromagnetic stirrer, which is mounted between strand guiding elements and is cooled against radiation and resistance heat.
  • the outer wall of such stirrers is designed in duplicate in order to pass a medium for cooling the housing through the resulting cavity.
  • the stirrer surface size facing the strand also has a decisive influence here, since this is proportional to the length of time the strand surface section remains in the area of influence of the stirrer and thus the time during which the strand section is not directly cooled.
  • the object is achieved in that the strand section facing the stirrer can be acted upon by a coolant from the stirrer.
  • the device according to the invention also makes it possible to adequately cool the respective strand surface section temporarily located in the area of influence of the stirrer.
  • the coolant in the form of spray compartments can be acted upon with an average angle of incidence to the strand surface of 15-80 °.
  • the inclination of the spray nozzles results in a sharp, mean angle of impact of the spray compartments and results in an extension of the spray path of the coolant. With an adequate cooling effect, this allows a reduction in the number of nozzles. The frequency of clogged nozzles with the resulting poor cooling, combined with increased maintenance work, is significantly reduced. Due to the possibility of cooling the strand in the area of action of the stirrer, the system can be operated at maximum pull-out speed and thus the greatest possible output without having to accept possible strand breakthroughs.
  • the spray compartments are preferably designed as wide-angle flat jet spray compartments. As a result, the entire strand width can be supplied with the coolant with just a few nozzles.
  • a stirrer installed entirely between two rollers normally covers the entire width of the strand and, depending on the mode of operation, can be of considerable length. This results in a large area facing the strand and thus a large strand section which is difficult to access directly for cooling.
  • the average impact angle of the spray compartments is expediently 30 °.
  • the strand section facing the stirrer can be acted upon by the coolant from the flanks of the exciter pin.
  • the strand section between the contact lines of the guide rollers and the respective adjacent stirrer flanks which is normally difficult to access for a coolant, can also be cooled directly.
  • the cooling medium used to dissipate the radiant heat is used for direct cooling of the strand in a stirrer provided with two independent cooling circuits.
  • Fig. 1 shows a continuous casting plant for steel, only partially shown, with a strand 4 consisting of a liquid core 2 and an already solidified strand skin 3 with a format of 130 mm square.
  • the strand 4 is conveyed out in the direction of the arrow with the aid of guide members in the form of support and guide rollers 5 arranged on both sides. Instead of rollers, plates, rails, etc. can also be used.
  • Usual devices 13 for secondary cooling of the strand are provided.
  • the distance is 30 mm.
  • the housing is designed for cooling with double walls, wherein a coolant-conducting cavity 9 is formed.
  • An additional, closed cooling circuit can be provided to dissipate the coil heat.
  • the possible flow direction of the coolant is indicated by two arrows.
  • guide elements (not shown here), for example baffles, are provided in this.
  • the active surface of the stirrer wide-angle flat jet spray nozzles 11 are attached for direct cooling of the strand section interacting with the stirrer surface.
  • nozzles 11 are directed so that the coolant spray compartments 12 emerging from them, viewed from their narrow side, strike the strand surface with an average impact angle ⁇ of approximately 30.
  • ⁇ average impact angle
  • all other suitable nozzles such as full cone or two-substance nozzles, can be used.
  • the embodiment shown here is particularly suitable for stick or bloom systems, since due to the smaller number of guide rollers required on the loose side of the system, the distance between the rollers is large enough to completely separate a stirrer between two rollers in the manner shown to attach.
  • a stirrer 25 acting transversely to the strand is partially installed between the strand guide rollers. It is designed in such a way that one or more parts 26 extending from it in the form of excitation pins, which serve to introduce the magnetic flux into the strand, extend between the guide rollers 24 ' , 24' and 24 "up to close to the surface of the strand.
  • the stirrer side facing the strand 21 is double-walled for cooling against radiant heat, whereby a cooling cavity 27 is formed. Guide elements (not shown) for regulating the coolant are attached in the cooling cavity 27.
  • the direction of flow of the coolant is indicated by arrows.
  • the outer wall 28 of the cooling cavity has Openings 29 for wide-angle flat jet nozzles for the direct cooling of the strand sections located between the contact lines of the guide rollers and the respective exciter pin flank 33, the cooling water flowing in the cooling cavity 27 simultaneously serving for the stirrer 25 for direct cooling of the strand is a separate cooling circuit 34 intended.
  • a single cooling circuit can be provided for certain embodiments. In the example shown, these nozzles are located on the two broad sides 33 of the exciter pins 26 and are provided in such a number that coolant can be applied to the entire strand width.
  • the mean angle of impact ⁇ of the spray fan 30 seen from the side is 60 ° and is so directed that the spray fan covers as large a part of the strand surface between the stirrer flanks 33 and the contact lines of the rollers.
  • spray nozzles can also be attached to the excitation surfaces 31 interacting with the strand, if this should be useful in terms of cooling technology due to the size of these surfaces.
  • the end faces of the latter can serve to support the strand surface.
  • the end faces can be provided with guide rails or designed as cooling plates.
  • each spray fan guide members are so ebracnt for the draining down cooling medium to g, for example, deflection plates that an ordered derivative of the cooling medium is guaranteed and one direct cooling disabling cooling medium layer on the strand is avoided.
  • the number of exciter pins 26 of the stirrer 25 is not limited to the two pins shown in FIG. 2, but several exciter pins can be provided in order to achieve an increased stirring effect in the strand core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP79104085A 1978-10-25 1979-10-22 Dispositif pour le refroidissement d'une barre dans une installation de coulée continue d'acier Withdrawn EP0010314A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH11027/78 1978-10-25
CH1102778A CH631903A5 (de) 1978-10-25 1978-10-25 Vorrichtung zum kuehlen eines stranges in einer stranggiessanlage fuer stahl mit einem elektromagnetischen ruehrer.

Publications (1)

Publication Number Publication Date
EP0010314A1 true EP0010314A1 (fr) 1980-04-30

Family

ID=4369299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104085A Withdrawn EP0010314A1 (fr) 1978-10-25 1979-10-22 Dispositif pour le refroidissement d'une barre dans une installation de coulée continue d'acier

Country Status (4)

Country Link
EP (1) EP0010314A1 (fr)
JP (1) JPS5557363A (fr)
CH (1) CH631903A5 (fr)
ZA (1) ZA795677B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106791A1 (fr) * 1982-09-14 1984-04-25 Asea Ab Dispositif de brassage des zones non solidifiées du billet en coulée continue
EP0165316A1 (fr) * 1982-06-08 1985-12-27 Kawasaki Steel Corporation Dispositif agitateur electromagnetique pour machine de coulee en continu
FR2664186A1 (fr) * 1990-07-06 1992-01-10 Aeg Elotherm Gmbh Dispositif pour l'agitation electromagnetique de barres.
US5088547A (en) * 1989-08-28 1992-02-18 Concast Standard Ag Electromagnetic stirrer for continuous casting

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT345496B (de) * 1976-12-30 1978-09-25 Getselev Zinovy N Elektromagnetische kokille zum kontinuierlichen oder halbkontinuierlichen stranggiessen von metallen
DE2743505A1 (de) * 1977-09-23 1979-03-29 Aeg Elotherm Gmbh Einrichtung zur erzeugung eines elektromagnetischen drehfeldes innerhalb der stuetzrollenbahn einer stranggiessanlage
DE2851071A1 (de) * 1977-12-05 1979-06-13 Alusuisse Elektromagnetische stranggiesskokille

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT345496B (de) * 1976-12-30 1978-09-25 Getselev Zinovy N Elektromagnetische kokille zum kontinuierlichen oder halbkontinuierlichen stranggiessen von metallen
DE2743505A1 (de) * 1977-09-23 1979-03-29 Aeg Elotherm Gmbh Einrichtung zur erzeugung eines elektromagnetischen drehfeldes innerhalb der stuetzrollenbahn einer stranggiessanlage
DE2851071A1 (de) * 1977-12-05 1979-06-13 Alusuisse Elektromagnetische stranggiesskokille

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IRON AND STEEL ENGINEER, Juni 1970 E.A. MUZIKAR "Spray Cooling Investigation for Continuous Casting of Billets and Blooms". * Seiten 53 bis 60 * *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165316A1 (fr) * 1982-06-08 1985-12-27 Kawasaki Steel Corporation Dispositif agitateur electromagnetique pour machine de coulee en continu
EP0165316A4 (fr) * 1982-06-08 1986-02-20 Kawasaki Steel Co Dispositif agitateur electromagnetique pour machine de coulee en continu.
US4706735A (en) * 1982-06-08 1987-11-17 Kawasaki Steel Corporation Continuous caster including an electromagnetic stirring apparatus
EP0106791A1 (fr) * 1982-09-14 1984-04-25 Asea Ab Dispositif de brassage des zones non solidifiées du billet en coulée continue
US5088547A (en) * 1989-08-28 1992-02-18 Concast Standard Ag Electromagnetic stirrer for continuous casting
FR2664186A1 (fr) * 1990-07-06 1992-01-10 Aeg Elotherm Gmbh Dispositif pour l'agitation electromagnetique de barres.

Also Published As

Publication number Publication date
JPS5557363A (en) 1980-04-28
ZA795677B (en) 1980-10-29
CH631903A5 (de) 1982-09-15

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810331

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Inventor name: SCHMID, MARKUS