EP0136459B1 - Guide de ligne pour installation de coulée continue d'acier - Google Patents

Guide de ligne pour installation de coulée continue d'acier Download PDF

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Publication number
EP0136459B1
EP0136459B1 EP84109074A EP84109074A EP0136459B1 EP 0136459 B1 EP0136459 B1 EP 0136459B1 EP 84109074 A EP84109074 A EP 84109074A EP 84109074 A EP84109074 A EP 84109074A EP 0136459 B1 EP0136459 B1 EP 0136459B1
Authority
EP
European Patent Office
Prior art keywords
strand
guide
strand guide
continuous casting
steel
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
EP84109074A
Other languages
German (de)
English (en)
Other versions
EP0136459A1 (fr
Inventor
Fritz Willim
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
Priority to AT84109074T priority Critical patent/ATE26663T1/de
Publication of EP0136459A1 publication Critical patent/EP0136459A1/fr
Application granted granted Critical
Publication of EP0136459B1 publication Critical patent/EP0136459B1/fr
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
    • 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
    • B22D11/1288—Walking bar members

Definitions

  • the invention relates to a strand guide of a steel continuous casting plant for producing a directly rollable strand, the strand guide having guide rails extending in the strand running direction with an interchangeable part facing the strand.
  • the casting heat present in the cast strand is to be optimally used. Many efforts have been made to feed the strand emerging from a continuous casting plant directly or after it has been cut, to direct deformation or rolling.
  • GB-PS 1188816 It is also known (GB-PS 1188816) to guide and extend the strand in the secondary cooling zone by means of metallic guide rails, the so-called “walking bars”. This achieves a support which prevents the strand from bulging, in particular from slabs, such guide rails resting on the surface of the strand, walking along a certain distance with the strand and then returning to their starting position.
  • the metallic guide rails have cooling channels in the vicinity of their work surfaces in order to both extract heat from the strand and also to cool the rails themselves.
  • a guide rail is also known, in which a metallic part of the rail facing the strand is detachably fastened to a support part of the rail by means of bolts.
  • the replaceable, metallic part has water channels for circulating cooling water. This should both cool the strand without the need for spray cooling and also protect the support part of the rail from heat.
  • the strand guide according to the invention with guide rails, which have a ceramic, insulating part facing the strand surface, makes it possible, on the one hand, to guide or support the strand safely and, at the same time, to prevent undesired heat emission.
  • Safe guiding and supporting is understood to mean that no harmful bulges occur on the strand, which still has a liquid core, as a result of the ferrostatic pressure. As is known, such bulges have negative effects on the cast product. The undesired heat emission is prevented due to the insulating effect of the ceramic part.
  • the mean strand temperature i.e. H.
  • the mean temperature above the strand thickness in the middle of the strand width is raised to normal rolling temperature, so that the strand can be heated without further heating, with the exception of the edges, i.e. Heat supply from the outside, which can be fed directly to further shaping, in particular by rolling. In exceptional cases, e.g. B. with wide slabs, an external heating of the edges may be appropriate.
  • the strand Before it is rolled, the strand can be separated using conventional separation units, e.g. B. by burner, after its complete solidification.
  • the necessary length of the insulating strand guide is approximately a quarter of the total strand guide length, which is known to have to extend from the lower mold end to the final solidification of the strand to prevent bulges.
  • the insulating design of the strand guide achieves both an increase in the strand surface temperature and a reduction in the difference between this strand surface temperature and the core temperature of the strand. It is also important that the solidification time and thus the position of the bottom of the swamp, i. the location of the solidification of the strand is not significantly affected by the insulating effect of the ceramic part of the guide rail.
  • the ceramic parts are advantageously connected to the support parts by means of metallic bolts, both the necessary counterpressure for ferrostatic pressure can be applied and the amount of heat dissipated can be predetermined within certain limits by the ratio of the ceramic surface on the strand to the metallic surface of the retaining bolts. Furthermore, the ceramic parts can be easily replaced by fastening with retaining bolts. If necessary, the metallic support body can be water-cooled, whereby the heat dissipation can also be influenced.
  • Direct rolling is also facilitated by descaling the strand with the guide rails before entering the strand guide and preventing the entry of atmospheric oxygen by inert gas in the further course of the strand.
  • a mold guide (5) consisting of guide rails (6) is arranged below a mold (1), a part of a strand guide (3) consisting of rollers (2, 2 ') and a drive-straightening unit (4).
  • these guide rails (6) located on the discharge side in the horizontal strand guide part extend in the longitudinal direction of the cast strand (7) and are, opposite one another, assigned to the inside or outside of the strand.
  • one or more rails are arranged side by side, which, as is known per se, support and guide the strand which has a liquid core by alternating contact.
  • Fig.2 six rails across the width of the slab of 1600mm are provided on each strand side.
  • the support extending several meters in the longitudinal direction and the narrow arrangement of the guide rails across the strand width means that there is no longer any danger of the slab being bulged.
  • two successive zones (5 ', 5 ") of guide rails, each about 5 m long, are provided.
  • a guide rail (6) essentially consists of a ceramic part (10) facing the strand (7), which is attached to a metal support part (12) by means of metallic bolts (11) or the like. is attached.
  • the rails are alternately pressed against the strand by means of a mechanism (not shown), seen along the strand width, moved with it in the strand running direction, lifted and returned, whereupon this cycle starts again.
  • Devices for performing this movement are well known from the prior art and are not the subject of the present invention.
  • the ceramic part (10) can be replaced after wear or if necessary by loosening the bolts (11).
  • the ceramic part (10) is the Rail guiding is heat-insulating and thus prevents the slab from cooling down undesirably and ensures temperature compensation within the individual strand areas.
  • the strand surface temperature reached is approx. 1200 ° C higher and the strand shell strength is lower than in conventional continuous casting plants. This would require smaller support spacings to avoid internal defects in the line. However, these cannot be achieved by rolling.
  • the ceramic part (10) can consist of a cast refractory mass.
  • the metallic support part (12) is water-cooled by cooling channels (15).
  • a descaling station (16) with high-pressure spray nozzles is therefore provided before entry into the first zone (5 ') of the guide rails (6).
  • the entry of atmospheric oxygen is in the area of these zones (5 ', 5 ") by inert gas, which is supplied via the line (17) and via a lateral seal (20) prevented.
  • the strand sections can be fed directly to a schematically illustrated rolling mill (19).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Coating With Molten Metal (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (5)

1. Guide-barre appartenant à une installation de coulée continue d'acier destinée à la fabrication d'une barre pouvant être laminée directement, le guide-barre comprenant des longerons de guidage qui s'étendent dans la direction du défilement de la barre et qui comprenent une partie interchangeable dirigée vers la barre, caractérisé en ce que cette partie (10) est composée d'une matière céramique et est fixée à une partie porteuse métallique (12).
2. Guide-barre selon la revendication 1, caractérisé en ce que la partie céramique (10) est fixée à la partie porteuse (12) par des goujons métalliques (11) dont la surface dirigée vers la barre (7) sert à soutenir la barre (7).
3. Guide-barre selon la revendication 2, caractérisé en ce que la partie porteuse (12) présente des canaux (15) pour la circulation d'un agent de refroidissement.
4. Guide-barre selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la région des longerons de guidage est fermée par des carters (20) de manière à former une sorte de chambre, pour empêcher la pénétration de l'air, et en ce qu'il est prévu une introduction de gaz inerte (17) aboutissant dans cette zone.
5. Guide-barre selon la revendication 4, caractérisé en ce qu'un dispositif de décalaminage (16) est disposé en amont des longerons de guidage (6) dans le sens de défilement de la barre.
EP84109074A 1983-08-10 1984-08-01 Guide de ligne pour installation de coulée continue d'acier Expired EP0136459B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84109074T ATE26663T1 (de) 1983-08-10 1984-08-01 Strangfuehrung einer stahlstranggiessanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4357/83 1983-08-10
CH4357/83A CH660564A5 (de) 1983-08-10 1983-08-10 Strangfuehrung einer stahlstranggiessanlage.

Publications (2)

Publication Number Publication Date
EP0136459A1 EP0136459A1 (fr) 1985-04-10
EP0136459B1 true EP0136459B1 (fr) 1987-04-22

Family

ID=4274585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109074A Expired EP0136459B1 (fr) 1983-08-10 1984-08-01 Guide de ligne pour installation de coulée continue d'acier

Country Status (6)

Country Link
EP (1) EP0136459B1 (fr)
JP (1) JPS6056459A (fr)
KR (1) KR850001843A (fr)
AT (1) ATE26663T1 (fr)
CH (1) CH660564A5 (fr)
DE (1) DE3463224D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406731C2 (de) * 1984-02-24 1986-07-24 Mannesmann AG, 4000 Düsseldorf Verfahren und Einrichtung zum Stranggießen von Metallen, insbesondere von Stahl

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1188816A (en) * 1967-04-13 1970-04-22 I Zd Tyazhelogo Mash Im S Ordz Apparatus for Extracting an Ingot from a Curved Mould of a Continuous Casting Plant.
US3688833A (en) * 1970-11-03 1972-09-05 Vladimir Alexandrovich Bykov Secondary cooling system for continuous casting plants
JPS5948697B2 (ja) * 1978-06-09 1984-11-28 新日本製鐵株式会社 連続鋳造装置の切断装置

Also Published As

Publication number Publication date
JPS6056459A (ja) 1985-04-02
EP0136459A1 (fr) 1985-04-10
KR850001843A (ko) 1985-04-10
DE3463224D1 (en) 1987-05-27
CH660564A5 (de) 1987-05-15
ATE26663T1 (de) 1987-05-15

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