EP0062676B1 - Vorrichtung zum kontinuierlichen giessen von metalldrähten, röhren und schichten - Google Patents

Vorrichtung zum kontinuierlichen giessen von metalldrähten, röhren und schichten Download PDF

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Publication number
EP0062676B1
EP0062676B1 EP19810902986 EP81902986A EP0062676B1 EP 0062676 B1 EP0062676 B1 EP 0062676B1 EP 19810902986 EP19810902986 EP 19810902986 EP 81902986 A EP81902986 A EP 81902986A EP 0062676 B1 EP0062676 B1 EP 0062676B1
Authority
EP
European Patent Office
Prior art keywords
chill mold
heat
metal
cooler
casting
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
EP19810902986
Other languages
English (en)
French (fr)
Other versions
EP0062676A1 (de
Inventor
Göran Adolf ÖHMAN
Hannu Kari Einari HEIKKILÄ
Rauli Ilmari Stenfors
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.)
Outokumpu Oyj
Original Assignee
Outokumpu Oyj
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 Outokumpu Oyj filed Critical Outokumpu Oyj
Priority to AT81902986T priority Critical patent/ATE13826T1/de
Publication of EP0062676A1 publication Critical patent/EP0062676A1/de
Application granted granted Critical
Publication of EP0062676B1 publication Critical patent/EP0062676B1/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
    • B22D11/04—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
    • 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
    • B22D11/055—Cooling the moulds

Definitions

  • the present invention relates to an apparatus for the continuous casting of metal bars, pipes and sheets, comprising a chill mold for receiving the molten metal, a cooling member fitted around the rear part of the chill mold as seen in the withdrawing direction, a refractory lining protecting at least the cooling member, and members for the continuous withdrawing of the bar, pipe or sheet which has solidified in the chill mold-from the chill mold.
  • the object of the present invention is to promote the transfer of the heat from the material being cast and thereby to increase the casting rate and obtain a more advantageous crystal structure in the casting, at least when copper or copper alloys are being cast.
  • the chill mold may be made of graphite, and during casting the heat transferred from the solidifying molten metal and the solidified metal is directed further to a cooling medium circulating in the cooler. It is very important that this transfer of heat is effective, for it decides the rate at which the continuous casting can be carried out.
  • a metal bar, pipe or sheet contracts when solidifying and cooling, and thereby a gap forms between the piece being cast and the chill mold; the gap is known to complicate the transfer of heat from the piece being cast to the chill mold. This gap cannot be completely eliminated because, if it is, then there is the risk that the casting adheres to the chill mold if the mold converges in the withdrawing direction. Owing to the low heat conductivity of air and gases, even a very narrow gap caused by contraction constitutes a considerable obstacle to the transfer of heat.
  • the object of the present invention is therefore to provide an apparatus for the continuous casting of metal bars, pipes or sheets, an apparatus in which the transfer of heat from the solidifying melt and the cooling metal piece is more effective than previously so that the casting rate can be increased and simultaneously a product with improved crystal structure can possibly be obtained.
  • the gap or gaps between the chill mold and the cooler are filled with a medium having a high thermal conductivity, such as molten metal or molten salt, in which case this gap is advantageously connected to an outside expansion vessel.
  • a medium having a high thermal conductivity such as molten metal or molten salt
  • a liquid with a high thermal conductivity such as a molten metal
  • a liquid with a high thermal conductivity such as a molten metal
  • the heat-transferring medium does not come into contact with the metal being cast and, owing to the drop of temperature between the walls of the chill mold, the boiling point of the heat-transferring medium need not necessarily be higher than the solidification point of the metal being cast. Also, there is no fear of leakage problems in this case.
  • the molten metal or salt is in a flowing motion, but it can just as well be completely stationary.
  • the effectiveness of the heat-transferring medium is based on its thermal conductivity, which is far superior to that of gas, a decisive factor in this connection.
  • the heat-transferring material fills as completely as possible the gaps between the chill mold and the cooler so that no gas pockets appear in these spaces. Therefore, it is advantageous to connect the gap or gaps to an expansion vessel for the heat-transferring medium so that heat-transferring medium can flow into the gap or gaps between the chill mold and the cooler and back as the volume of the gaps varies according to the thermal expansion movement of the surrounding walls.
  • Figures 1 and 2 depict cross sectional side elevations of two preferred embodiments of the invention.
  • the melt to be cast is indicated by reference numeral 1.
  • the melt to be cast can be in a melt container the wall of which in general is indicated by 2 and to which a chill mold 4 made of graphite is attached to receive the melt. Outside the container wall 2 there is, fitted around the chill mold 4, a cooler 3, in which ducts for the cooling medium have been made in a known manner.
  • the melt 1 flowing into the chill mold 4 yields heat to the walls of the chill mold 4 and forms, at a certain distance from the inlet of the chill mold 4, a solidification front, which is indicated by a dotted line in the drawing.
  • the solidified metal is withdrawn in the form of a bar 7 from the chill mold 4 by means of withdrawal members 9.
  • the gap 6 between the chill mold 4 and the cooler 3 is connected by means of a pipe 8 to an expansion vessel 10, which is partly filled with a medium which transfers heat well.
  • the expansion vessel 10 is at a higher level than the gap 6, in which there thus prevails a metallostatic pressure when molten metal is used as the cooling medium.
  • the metal in the expansion vessel can be maintained in a molten state by, for example, fitting a heating resistor around the vessel.
  • reference numeral 2 in Figure 1 indicates a refractory lining which prevents the melt from coming into direct contact with the cooler 3, which in this case must be lowered at least partly to a level below the melt surface.

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

Claims (3)

1. Vorrichtung zum kontinuierlichen Guss von metallischen Stangen, Rohren oder Blechen, mit einer Kühlkokille (4) zum Eingiessen der Metallschmelze (1), einer Kühleinrichtung (3), die den hinteren Bereich der Kühlkokille (4) umgibt, in Ablugsrichtung gesehen, eine feuerfeste Auskleidung (2), die mindestens die Kühleinrichtung (3) schützt, und Einrichtungen (9) für den kontinuierlichen Abzug der Stange (7), des Rohres oder des Bleches aus der Kühlkokille (4), worin sie sich verfestigt haben, gekennzeichnet durch ein stark wärmeleitendes Medium, das den Zwischenraum (6) zwischen der Kühlkokille (4) und der Kühleinrichtung (3) ausfüllt und sich zumindest während des Giessvorganges in flüssigem Zustand befindet.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Zwischenraum (6) zwischen der Kühlkokille (4) und der Kühleinrichtung (3) mit einem äusseren Ausdehnungsgefäss (10) verbunden ist (8).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das stark wärmeleitende Medium ein Metall ist, das mindestens 50 Gew.-% Zinn enthält.
EP19810902986 1980-10-17 1981-10-16 Vorrichtung zum kontinuierlichen giessen von metalldrähten, röhren und schichten Expired EP0062676B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81902986T ATE13826T1 (de) 1980-10-17 1981-10-16 Vorrichtung zum kontinuierlichen giessen von metalldraehten, roehren und schichten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI803270 1980-10-17
FI803270A FI77586C (fi) 1980-10-17 1980-10-17 Anordning foer kontinuerlig gjutning av metallstaenger, -roer och -plattor.

Publications (2)

Publication Number Publication Date
EP0062676A1 EP0062676A1 (de) 1982-10-20
EP0062676B1 true EP0062676B1 (de) 1985-06-19

Family

ID=8513858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810902986 Expired EP0062676B1 (de) 1980-10-17 1981-10-16 Vorrichtung zum kontinuierlichen giessen von metalldrähten, röhren und schichten

Country Status (3)

Country Link
EP (1) EP0062676B1 (de)
FI (1) FI77586C (de)
WO (1) WO1982001332A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104128574B (zh) * 2014-07-15 2016-04-13 武汉泛洲中越合金有限公司 水平连铸铸造装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876573C (de) * 1950-06-11 1953-05-15 Siegfried Dr-Ing E H Junghans Verfahren zum Kuehlen von Giessformen und Giessform zum Ausueben des Verfahrens
CH537766A (de) * 1971-08-30 1973-06-15 Bbc Brown Boveri & Cie Verfahren und Einrichtung zum kontinuierlichen Giessen oder Ziehen eines insbesondere metallischen Strangkörpers

Also Published As

Publication number Publication date
FI77586B (fi) 1988-12-30
EP0062676A1 (de) 1982-10-20
FI77586C (fi) 1989-04-10
WO1982001332A1 (en) 1982-04-29
FI803270L (fi) 1982-04-18

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