EP0240837A2 - Installation de coulée continue horizontale - Google Patents

Installation de coulée continue horizontale Download PDF

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Publication number
EP0240837A2
EP0240837A2 EP87104362A EP87104362A EP0240837A2 EP 0240837 A2 EP0240837 A2 EP 0240837A2 EP 87104362 A EP87104362 A EP 87104362A EP 87104362 A EP87104362 A EP 87104362A EP 0240837 A2 EP0240837 A2 EP 0240837A2
Authority
EP
European Patent Office
Prior art keywords
continuous casting
mold
guide tube
horizontal continuous
heat
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.)
Ceased
Application number
EP87104362A
Other languages
German (de)
English (en)
Other versions
EP0240837A3 (fr
Inventor
Franz Keutgen
Achim Kubon
Dieter Perings
Peter Dr.-Ing. Stadler
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0240837A2 publication Critical patent/EP0240837A2/fr
Publication of EP0240837A3 publication Critical patent/EP0240837A3/fr
Ceased 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting

Definitions

  • the invention relates to a horizontal continuous casting device with a storage vessel to which the horizontal continuous casting mold is interchangeably attached by means of a sealing nozzle block, the horizontal continuous casting mold adjacent to the nozzle block having a length section of a mold tube made of a heat-conducting material, to which a mold tube length section made of the less heat-conducting material is connected , which is arranged in a guide tube made of steel, which is surrounded by coolant on the outside.
  • Such a horizontal continuous casting device is known from DE-OS 20 25 764.
  • the guide tube has the task of keeping the insert from the heat less highly conductive material, to secure it and to enable the heat transfer from the cast strand surface through the material to the cooling water.
  • the less heat-conducting material mostly consists of graphite.
  • the heat is therefore removed from the cast strand through the graphite and through the guide tube to the coolant, such as cooling water.
  • Graphite which is in contact with a cast strand made of metal, in particular steel, is used because of the "self-lubrication" and other advantageous properties. These characteristic values are particularly important for a steel guide tube.
  • the mold tube length section following the nozzle block and upstream of the guide tube usually consists of copper and is referred to as a copper module.
  • the cast strand shell is formed with every drawing process and intermittently welded to the cast strand.
  • strong cooling as guaranteed by copper, must initially be achieved.
  • the growing cast strand shell forms in itself an increasing resistance to the heat transfer, so that viewed in the casting direction, a material with a lower thermal conductivity, such as graphite, is sufficient for cooling.
  • Such a graphite tube is now pressed into the guide tube in order to provide sufficient stability and cooling options.
  • the guide tube is cooled with water from the outside.
  • the guide tube was made from copper or from structural steel (unalloyed or low-alloy structural steel). However, problems arise with both copper and structural steel.
  • Copper is disadvantageous because of the high thermal conductivity with low material properties and the high elasticity.
  • the high thermal conductivity means that structural steel is cooled very abruptly, which can lead to stresses in the thin cast shell and thus to internal cracks.
  • the high elasticity and the low strength of the material copper is disadvantageous because a guide tube made of it deforms, which also causes qualitative disadvantages for the cast strand.
  • the material price for copper is very high.
  • Structural steel is usually used in thinner wall thicknesses than copper in order to compensate for the low thermal conductivity.
  • the stability of the guide tube suffers if the wall thickness is too small.
  • a major disadvantage of structural steel guide tubes is the corrosion resistance of the material. As a result, the properties relating to cooling can change locally.
  • Corrosion also causes sealing problems, since wear of the guide tube also occurs at the sealing points. Such signs of wear can require a replacement of the guide tube within a short time, so that due to the considerably shorter service life there are hardly any cost advantages compared to a guide tube made of copper.
  • the low strength of the material, like copper, can also lead to disadvantageous deformations of the guide tube.
  • the invention is therefore based on the object of improving the properties of the guide tube with respect to shape, durability, economy with sufficient thermal conductivity.
  • the stated object is achieved according to the invention at the outset by virtue of the fact that the length of the mold tube made of less heat-conducting material is arranged within such a guide tube which is made of corrosion-resistant, heat-resistant steel with a thermal conductivity of 20 to 40 W / mK.
  • the correspondingly more expensive production compared to a guide tube made of structural steel is more than offset by the significantly increased durability, which is included in the total costs, as has been shown by extensive tests.
  • the wall thickness of the guide tube is 5 to 20 mm.
  • the horizontal continuous casting device has a storage vessel (1) with an outlet (2).
  • the outlet (2) is essentially formed by a nozzle block (3).
  • the horizontal continuous casting mold (5) adjoining the nozzle block (3) in the continuous casting direction (4) is connected in a sealed manner to the outlet (2) via the nozzle block (3).
  • the horizontal continuous casting mold (5) has a mold tube (6) which consists of a heat-conducting first mold tube length section (7) (e.g. made of copper) and a heat-less conductive second mold tube length section (8) (e.g. made of graphite).
  • the length of the mold tube sections (7 and 8) are sealed together at their joint (9).
  • the mold tube length section (8) (e.g. made of graphite) is pressed into a guide tube (10).
  • Cooling channels (12 and 13) are formed between the housing (11) and the guide tube (10), so that the coolant flow from the coolant inlet (14) around a sleeve (15) is circulated through a coolant outlet (16), whereby the coolant flows are separated by an annular wall (17).
  • the guide tube (10) is resiliently held in the axial direction by means of a housing cover (18). Here the guide tube (10) against a collar (7a) of the mold tube length section (7), which itself is connected to the housing (11).
  • the guide tube (10) consists of corrosion-resistant steel, so that the cooling water does no damage from the outside.
  • the heat-resistant property of the guide tube (10) makes it possible to absorb a significant temperature jump from the cast strand shell temperature (approx. 1300 to 1500 degrees C) to the coolant temperature. With a thickness of 5 to 20 mm, a thermal conductivity of 20 to 40 W / m.K is favorable. Given the given values, it is advantageously possible to reduce the length of the horizontal continuous casting mold (9) to approximately 700 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP87104362A 1986-04-04 1987-03-24 Installation de coulée continue horizontale Ceased EP0240837A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3611363 1986-04-04
DE19863611363 DE3611363A1 (de) 1986-04-04 1986-04-04 Horizontalstranggiessvorrichtung

Publications (2)

Publication Number Publication Date
EP0240837A2 true EP0240837A2 (fr) 1987-10-14
EP0240837A3 EP0240837A3 (fr) 1988-01-20

Family

ID=6297957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104362A Ceased EP0240837A3 (fr) 1986-04-04 1987-03-24 Installation de coulée continue horizontale

Country Status (4)

Country Link
EP (1) EP0240837A3 (fr)
JP (1) JPH0120048Y2 (fr)
BR (1) BR8701545A (fr)
DE (1) DE3611363A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1307424A (en) * 1969-05-26 1973-02-21 Gen Motors Corp Apparatus for continuous casting
US3642058A (en) * 1970-02-16 1972-02-15 Gen Motors Corp Mold apparatus for continuous casting
AT301073B (de) * 1970-03-24 1972-07-15 Adamec A Mehrteilige stranggieszkokille
DE2520091A1 (de) * 1975-05-06 1976-11-18 Davy Loewy Ltd Kokille fuer strangguss

Also Published As

Publication number Publication date
JPS62179150U (fr) 1987-11-13
BR8701545A (pt) 1988-01-26
EP0240837A3 (fr) 1988-01-20
DE3611363C2 (fr) 1988-11-10
DE3611363A1 (de) 1987-10-15
JPH0120048Y2 (fr) 1989-06-12

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Inventor name: PERINGS, DIETER

Inventor name: VOSS-SPILKER, PETER, DR.-ING.

Inventor name: KUBON, ACHIM

Inventor name: KEUTGEN, FRANZ

Inventor name: STADLER, PETER, DR.-ING.