EP0151802B1 - Vorrichtung für die Einleitung von Metallschmelze, insbesondere von Stahlschmelze in eine Stranggiesskokille - Google Patents

Vorrichtung für die Einleitung von Metallschmelze, insbesondere von Stahlschmelze in eine Stranggiesskokille Download PDF

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Publication number
EP0151802B1
EP0151802B1 EP84116319A EP84116319A EP0151802B1 EP 0151802 B1 EP0151802 B1 EP 0151802B1 EP 84116319 A EP84116319 A EP 84116319A EP 84116319 A EP84116319 A EP 84116319A EP 0151802 B1 EP0151802 B1 EP 0151802B1
Authority
EP
European Patent Office
Prior art keywords
continuous casting
pouring
section
casting mould
nozzle
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
EP84116319A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0151802A3 (en
EP0151802A2 (de
Inventor
Peter Dr. -Ing. Voss-Spilker
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6226760&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0151802(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT84116319T priority Critical patent/ATE41337T1/de
Publication of EP0151802A2 publication Critical patent/EP0151802A2/de
Publication of EP0151802A3 publication Critical patent/EP0151802A3/de
Application granted granted Critical
Publication of EP0151802B1 publication Critical patent/EP0151802B1/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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles

Definitions

  • the invention relates to a device for the introduction of molten steel in the form of a pouring jet into a continuous casting mold, with at least one pouring pipe attached to a reservoir.
  • Such a device known from DE-A-1 558 379 fluidically connects the storage container to the continuous casting mold, prevents greater heat losses from the molten metal and essentially protects the molten metal from reoxidation.
  • the casting of liquid steel on vertical continuous casting plants is limited to certain format dimensions with small dimensions of the cast strand according to the current state of the art. Below these format dimensions, it is no longer possible to ensure that the molten metal flows from the storage container into the continuous casting mold.
  • the four-pouring of dimensions in the range from 70 mm diameter or square to 120 mm diameter or square is currently only possible by free pouring, i.e. H. possible by the free fall of the molten metal, the pouring of the molten metal by a dip spout having to be dispensed with.
  • the pouring jet runs directly from the storage container into the continuous casting mold.
  • the pouring stream must be surrounded by a protective gas curtain.
  • a protective gas curtain With such a protective gas curtain, additional costs for the device outlay and for the operation are associated.
  • a pouring tube with a closed bottom and sideways channels is known from AT-B 310 970.
  • the task of the pouring tube is to generate a directional flow below the pouring level in the mold so that non-metallic inclusions are rinsed onto the surface of the steel.
  • the channels leading sideways are cut obliquely on the outlet side of the melt in order to influence the flow direction of the metal flowing into the mold in such a way that a deviation of the flow direction from the longitudinal axis of the tubes is achieved.
  • the invention is therefore based on the object of proposing a device for particularly small or narrow pouring cross-sections which allows the steel melt to be introduced into the pouring opening of the continuous casting mold in a fluid-technically favorable manner for so-called thin strands, without greater heat loss or without undue increase in the risk of reoxidation .
  • the object is achieved in a device of the type specified in claim 1 according to the invention in that for the introduction into a continuous casting mold 7 with a casting cross section of less than 70 mm width and at least 70 mm length or a casting cross section with an edge length or a diameter of less than 70 mm, the pouring tube 4 has an upper section 4a which completely surrounds the pouring jet and an immediately adjoining lower section 5 which is assigned to the pouring opening 7b of the continuous casting mold 7 and in which section 5 the pouring jet is guided only on a part of its circumference .
  • the invention provides for a device according to the preamble of claim 2 that for the introduction into a continuous casting mold 7 with a casting cross-section less than 70 mm wide and at least 70 mm long or a casting cross-section with an edge length or a diameter of less than 70 mm is provided on the pouring tube 4 with a section 4a which completely surrounds the pouring jet, a section 5 in the form of a run-off slope 13 assigned to the pouring opening 7b of the continuous casting mold 7.
  • This device has the advantages of ensuring the greatest possible flow guidance while avoiding the free fall of the molten metal, further avoiding temperature losses under the given circumstances as far as possible and also largely preventing reoxidation.
  • An important advantage of the invention is the possibility created to introduce the molten metal into very narrow casting spaces of continuous casting molds without wetting the upper edge of the continuous casting mold. The theory of the invention therefore creates the conditions for the casting of extremely thin cast strands.
  • the oblique to vertical insertion of the molten metal advantageously favors the solidification conditions within the continuous casting mold.
  • the lower open section of a pouring tube with an annular cross section cut obliquely at its pouring end forms the greatest possible guidance for the flow of the molten metal, so that inflow conditions arise here similar to dip tubes in which the molten metal emerges below the pouring level.
  • the lower open section consists of a run-off slope provided below the pouring pipe and directed into the continuous casting mold, then there is the advantage that the metal melt in Distribute the longitudinal direction of the continuous casting mold at the same time and promote a laminar flow.
  • drain slope is provided separately from the pouring pipe.
  • the distribution of the molten metal in continuous casting molds with boundary walls of the casting chamber of considerably different lengths is fundamentally favored in that the run-off slope is adapted to the length of the casting chamber of the continuous casting mold. It is advantageous that overflow webs are provided on the run-off edge of the run-off slope and / or on the side ends of the run-off slope. Such overflow webs also distribute the molten metal slightly in the longitudinal direction of the continuous casting mold.
  • the molten metal is guided out of the storage container 1 through a regulating and closing mechanism 2 and through an outlet nozzle 3 by means of a pouring pipe 4 into a continuous casting mold 7.
  • the continuous casting mold 7 forms a very narrow casting space 8.
  • the pouring pipe 4 has a closed upper section 4a and an immediately adjoining lower, obliquely cut section 5.
  • the lower section 5 tapers from the point 5a (beginning of the lower section 5) to the point 5b, the pouring pipe 4 between the points 5a and 5b having approximately the shape of a channel.
  • the molten metal 9 therefore flows, guided through the pouring pipe 4, up to the top of the continuous mold upper edge 7a of the continuous casting mold 7 and into the continuous casting mold 7 up to the casting level 6.
  • the lower section 5 projects into the pouring opening 7b of the continuous casting mold 7.
  • a second exemplary embodiment (FIG. 2) provides a storage container 1 with a regulating and closing mechanism 2 and the outlet nozzle 3 which is offset laterally to the continuous casting mold 7 and in which the pouring pipe 4 extends at an angle 11, which results in a variable metal melt flow in the area of the casting level 6 results in the very narrow casting space 8.
  • the first and second exemplary embodiments each presuppose an annular cross section 12 of the pouring tube 4.
  • the upper closed section 4a and the lower, partially open section 5 are designed separately from one another, which is associated with advantages in the production of refractory parts.
  • a drainage slope 13 is arranged under the pouring end 4b, from which the molten metal 9 flows into the continuous casting mold 7 and forms the controlled casting level 6.
  • the run-off slope 13 is advantageously mounted on the support 14, which is fixed at a fixed position 15, and is adjustable in angle.
  • the run-off slope 13 consists of refractory materials, similar to the pouring pipe 4. In the length of the casting chamber 8 (Fig. 4).
  • the drainage slope 13 provided separately from the pouring pipe 4 is designed to be correspondingly long and the metal melt 9 can lead to the casting level 6 in a laminar flow 17.
  • the lower, partially open section 5 can also be provided with a reoxidation protection 20, z. B. inert gas is passed into the interior 20a.
  • the run-off slope 13 in section 5 is made together with the pouring pipe 4 from a common part.
  • the drainage slope 13 can be designed in cooperation with the outlet opening 4c to form a flow-adapted steering channel 13a (FIG. 6).
  • the run-off slope 13 is particularly suitable for distributing the molten metal 9 in a continuous casting mold 7 for a so-called thin strand with mold broad sides of less than 100 mm.
  • the run-off slope 13 or the lower open section 5 can be kept so small in their dimensions at the lower end that the molten metal 9 can be passed in laminar flow into the very narrow continuous casting mold 7 without difficulty, wherein metal splashes on the continuous casting mold upper edge 7a are avoided will.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP84116319A 1984-02-04 1984-12-27 Vorrichtung für die Einleitung von Metallschmelze, insbesondere von Stahlschmelze in eine Stranggiesskokille Expired EP0151802B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116319T ATE41337T1 (de) 1984-02-04 1984-12-27 Vorrichtung fuer die einleitung von metallschmelze, insbesondere von stahlschmelze in eine stranggiesskokille.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3403892 1984-02-04
DE3403892A DE3403892C2 (de) 1984-02-04 1984-02-04 Vorrichtung für die Einleitung von Metallschmelze, insbesondere von Stahlschmelze, in eine Stranggießkokille

Publications (3)

Publication Number Publication Date
EP0151802A2 EP0151802A2 (de) 1985-08-21
EP0151802A3 EP0151802A3 (en) 1986-04-30
EP0151802B1 true EP0151802B1 (de) 1989-03-15

Family

ID=6226760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116319A Expired EP0151802B1 (de) 1984-02-04 1984-12-27 Vorrichtung für die Einleitung von Metallschmelze, insbesondere von Stahlschmelze in eine Stranggiesskokille

Country Status (4)

Country Link
EP (1) EP0151802B1 (enrdf_load_stackoverflow)
JP (2) JPS6178539A (enrdf_load_stackoverflow)
AT (1) ATE41337T1 (enrdf_load_stackoverflow)
DE (1) DE3403892C2 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2656945A1 (de) * 2012-04-26 2013-10-30 SMS Concast AG Feuerfestes Giessrohr für eine Kokille zum Stranggiessen von Metallschmelze

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558379A1 (de) * 1967-03-24 1972-03-23 Vesuvius Crucible Co Vorrichtung zum Giessen geschmolzenen Metalls aus einem Behaelter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT280508B (de) * 1968-08-23 1970-04-10 Voest Ag Verfahren zur Herstellung von Strängen im Stranggießverfahren und Einrichtung zur Durchführung des Verfahrens
BE790371A (fr) * 1971-10-21 1973-02-15 Voest Ag Tube de coulee refractaire pour le coulage en continu de metauxen fusion
US3867978A (en) * 1973-04-12 1975-02-25 Concast Inc Method and apparatus for introduction of steel into a continuous casting mold
CH628543A5 (de) * 1978-06-01 1982-03-15 Concast Ag Verfahren und vorrichtung zum stranggiessen von metall in ein- oder mehrstranganlagen.
DE2919880C2 (de) * 1979-05-17 1983-10-13 Didier-Werke Ag, 6200 Wiesbaden Feuerfestes Gießrohr zwischen Gießpfanne und Zwischenbehältern von Stranggießanlagen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558379A1 (de) * 1967-03-24 1972-03-23 Vesuvius Crucible Co Vorrichtung zum Giessen geschmolzenen Metalls aus einem Behaelter

Also Published As

Publication number Publication date
JPH0115343B2 (enrdf_load_stackoverflow) 1989-03-16
EP0151802A3 (en) 1986-04-30
DE3403892C2 (de) 1986-08-14
DE3403892A1 (de) 1985-08-14
ATE41337T1 (de) 1989-04-15
JPS63290667A (ja) 1988-11-28
JPS6347542B2 (enrdf_load_stackoverflow) 1988-09-22
JPS6178539A (ja) 1986-04-22
EP0151802A2 (de) 1985-08-21

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