EP0263779A2 - Installation de coulée continue de métal liquide - Google Patents

Installation de coulée continue de métal liquide Download PDF

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Publication number
EP0263779A2
EP0263779A2 EP87730124A EP87730124A EP0263779A2 EP 0263779 A2 EP0263779 A2 EP 0263779A2 EP 87730124 A EP87730124 A EP 87730124A EP 87730124 A EP87730124 A EP 87730124A EP 0263779 A2 EP0263779 A2 EP 0263779A2
Authority
EP
European Patent Office
Prior art keywords
mold
coolant
cooling
strand
arrangement
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Withdrawn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
EP87730124A
Other languages
German (de)
English (en)
Other versions
EP0263779A3 (fr
Inventor
Raymond L. Polick
Kenneth D. Tamburrino
Edmund H. Becker
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 EP0263779A2 publication Critical patent/EP0263779A2/fr
Publication of EP0263779A3 publication Critical patent/EP0263779A3/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Withdrawn legal-status Critical Current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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds

Definitions

  • the invention relates to a device for the continuous casting of molten metal.
  • metals with a carbon content particularly in the middle range between 0.15 and 0.35 and higher, are cast using the open mold oil process, the molten metal solidifies unevenly.
  • the metal shrinks unevenly from the mold and faster than the lower carbonaceous metals, so that the solidification becomes uneven and unacceptable product forms arise.
  • the known fixed-length molds for casting steel correspond to those mentioned above and are usually made of copper. These copper molds tend to wear quickly in the lower area and this results in high installation costs.
  • This mold arrangement should be quick and easy to adapt and, furthermore, it should have a variable length, so that when the longer mold tube is worn in the lower region, it can be shortened and inserted into a mold arrangement that is required for casting a product with a shorter residence time.
  • the task is to create a mold arrangement with flexibility for the required length changes when casting metals of different chemical compositions, which is very inexpensive.
  • the mold arrangement according to the invention essentially consists of a stationary and a removable cooling jacket section. Both cooling jacket sections have flange sections which are connected to one another in order to join the stationary section to the removable section.
  • a flange is also used to attach the removable cooling jacket section to part of the secondary cooling unit of the system or casting machine. Both the flange for the stationary cooling jacket and for the secondary cooling unit are designed in such a way that they can be connected to one another when the removable cooling jacket section is removed.
  • the flange connection is to be designed such that the cooling jacket of the mold arrangement can be connected to a section of the secondary cooling unit with or without the removable cooling jacket section.
  • the tubular mold and the inner wall of the cooling jacket, adjacent to this tubular mold, can be easily shortened and completely replaced, their length generally corresponding to the cooling jacket.
  • part of the secondary cooling unit can be connected to the mold arrangement and a further cooling part can be provided which is used between this attachable cooling unit and a fixed part of the secondary cooling unit if a shorter mold arrangement is used.
  • FIGS. 1 and 2 show a mold arrangement 10 which can be vibrated by means of suitable means (not shown) and which picks up molten metal such as steel.
  • the molten metal is transported in the pan during continuous casting and poured into intermediate vessels which feed the metal directly to the mold arrangement 10.
  • the mold swings to detach the skin from the mold wall during the solidification phase of the metal and to stir the metal.
  • the initial solidification takes place in the mold 10 while the hardening of the core occurs in the secondary cooling unit 12 below the mold arrangement 10.
  • the cooling unit 12 consists of a plurality of rollers 14 and spray units 16, as are common in conventional continuous casting plants.
  • the secondary cooling unit 12 consists of two sections 12a and 12b, the section 12a being connected directly to the bottom of the mold arrangement 10 and the section 12b being located below the section 12a, as will be seen later to be explained.
  • the mold arrangement in FIG. 1 is usually used when metals which are high-alloy are to be cast, while the mold arrangement according to FIG. 2 is shorter and has no extension and for metals with a low carbon content, which is usually between 0.15 and 0.35 % lies, is used, especially when pouring with an oil lubricant.
  • FIGS. 1 and 2 relate to the same components.
  • the mold arrangement 10, 10a shown in FIGS. 1 and 2 has a cooling jacket 18 which surrounds a tubular copper mold 20, 21.
  • the mold has a cavity with opposite ends 20a, 20b and 21a, 21b, the upper end 20a, 21a for receiving the molten metal and the lower end 20b, 21b for progressively releasing the metal strand, which then moves into the cooling zone 12.
  • the cooling jacket 18 in Figures 1 and 2 consists of a stationary upper section 22 and, as shown in Figure 1-, a removable lower section 24 which serves as an extension to give length to the stationary section 22.
  • Both the stationary and removable sections 22, 24 are formed from an inner wall portion 26, 26a which extends substantially the length of the tubular mold 20, 21 and which is arranged adjacent to and at a distance from the mold 20, 21 .
  • the distance and the orientation of the inner wall part 26, 26a of the cooling jacket 18 is achieved by a plurality of spacer elements which are arranged around and on the upper part and on the bottom, namely on the inner curved wall part 26, 26a. These spacer elements are designated 28, 28a on the upper part and 30, 30a on the bottom.
  • the spacers 28, 28a abut the top surface of an annular portion 32 which partially forms the top portion of the stationary top portion 22.
  • the annular element 32 has an inner upper shoulder 34 for receiving the ring 36, which forms the entry into the mold 20, 21, and an outer cut 38 for receiving the collar 40 of an outer wall element 42 of the stationary upper section 22.
  • the section 22 receives an annular baffle 44 which is attached to the outer wall portion 42.
  • This baffle 44 has a coolant inlet and outlet which are not shown in the figures.
  • An annular part 46 which is fastened to the inner wall 26, 26a below the part 44, carries a seal 48.
  • the parts 26 or 26a, 28 and 48 are made in one piece.
  • the coolant flows into the stationary section 22 and, with reference to FIG. 1, into the removable section 24. It flows between the spacers 30 below the inner wall 26 or 26a into the cavity between the mold 20 and the inner wall 26a (FIG. 2) . Furthermore, the coolant flows through the spacer 28 at the top of the annular wall part 26, 26a back into the outlet region of 44 in the stationary section 22.
  • the lower boundary of the stationary section 22 has an annular flange element 50, the upper surface of which bears in FIG. 1 on a support part 52, the lower surface of which represents a connection to the extension 24 in FIG. 1 or to the section 12a of the secondary coolant unit in FIG. 2, as will be explained in more detail below.
  • the length of the cooling jacket 18 is caused by the extension or the removable portion 24.
  • the removable section 24 consists of an upper annular flange 54 and a lower annular flange 56, which is held at a distance from the flange 54 by the outer wall part 58.
  • a closure for the removable portion 24 is provided by the inner wall member 26 which extends the length of the portion 24 and by an annular member 60 which receives the lower flange 56 and the spacers 30, 30a and forms the basis for the mold assembly 10 in FIG. 1.
  • the base part 60 is in turn connected to the annular part 62, which is part of the section 12a of the cooling unit 12 of both mold arrangements 10, 10a in FIGS. 1 and 2.
  • the tubular mold 20, 21 is carried by an annular part 32, namely at the top and at the bottom by the annular part 60 and between them a seal is created by annular seals 61, 63 at the top and bottom of the mold arrangement 10, 10a.
  • the coolant is supplied to the spray nozzles 16 of the secondary cooling unit 12a in FIGS. 1 and 2 through the pipes 17 and 18.
  • spray nozzles 16 are provided on both sides of the cooling unit 12a and a further row of rollers 14 as shown in Figure 3.
  • the flanges 54 and 56 of the removable portion 24 are bolted to the flanges 50 of the annular portion 60 as shown on the right side of FIG. 1.
  • stabilization between the flanges 54 and 56 of the removable section is achieved by sleeves 65 and a bolt 67 which extends downwards through the support part 52, the annular flange 50, the flanges 54 and 56, the base part 60 and the part 62 extends.
  • dowels which are designated with 64, 66, 68 and 70.
  • the aforementioned coolant flows through annular openings 69, 71 ( Figure 1).
  • the opening 69 is formed by the part 50 and the inner wall 26 and the opening 71 by the part 54 and the wall 26 ( Figure 1).
  • the flange 54 of the removable part 24 has an inner lip 72 and the base part 60 has a corresponding lip 74. These lips 72 and 74 serve to ensure that the removable section 24 is properly seated between the stationary upper part To ensure section 22 and section 12a of the cooling unit 12.
  • the flange 50 of the upper section has an undercut corresponding to the flange 56 of the removable section 24, so that it sits correctly in the section 12a of the cooling unit 12 when the section 24 Will get removed.
  • the coolant is discharged to and from the cooling jacket 18 through the coolant inlet line and outlet line connected to the part 44.
  • a plurality of openings are provided for removing the coolant, two of which are designated 78 and 80.
  • tubular mold 20 and the inner wall 26 extend over the length of the mold arrangement 10, which contains the removable section 24 for extension.
  • these components 20 and 26 are replaced by components 21, 26a, which also extend over the length of the mold arrangement 10a.
  • These components 21, 26a in Figure 2 have a shorter length than that of Figure 1 and are secured in the assembly 10a so that they can be easily removed to adjust the length of the assembly.
  • the mold arrangement according to FIG. 1 is used when low-carbon steels are cast in the range between 0.15% and less.
  • the arrangement according to FIG. 2 is used, with the lower section 24 of the cooling jacket 18 removed. This section 24 according to FIG obvious cuts removed and the annular member 60 comes into contact with the annular flange member 50 which is part of the stationary cooling section 22 of the cooling jacket of Figure 2.
  • the outer layer of the liquid metal solidifies on contact with the tubular mold 20, 21, and the solidification continues gradually towards the core as the strand passes through the mold.
  • the strand reaches the secondary cooling unit 12.
  • FIGS. 3a and 3b schematically show the mold arrangement 10, 10a relative to the secondary cooling unit 12.
  • the diagram in FIG. 3a is that of the mold according to FIG. 1 with a removable section 24 and the cooling area 12a.
  • This cooling area 12a is connected to the mold 10 by the previously described means and it consists of two rows of rollers 14, the tubes 17, 19 and the spray nozzles 16.
  • the lower part of this diagram shows the continuous cooling unit 12b of the secondary cooling unit 12.
  • the mold according to FIG. 2 is shown in the diagram according to FIG. 3b without a removable mold section 24.
  • the cooling section 12a is arranged on the mold.
  • the arrangement of the mold 10, 10a is in both representations along a common feed line "A" for molten metal.
  • the secondary cooling unit 12b is also a permanent construction in the continuous caster, the upper limit of which is labeled "B".
  • the mold 20, 21 and the inner wall parts 26, 26a of the cooling jacket 18 can be in two parts, the two sections being connected to one another by suitable means, so that when the shorter version of the mold according to FIG. 1 is required, the lower one Section of each component 20, 26 can be easily separated to obtain substantially the same length as the mold arrangement 10a in Figure 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP87730124A 1986-10-10 1987-10-09 Installation de coulée continue de métal liquide Withdrawn EP0263779A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/917,705 US4714103A (en) 1986-10-10 1986-10-10 Continuous casting mold
US917705 1992-07-22

Publications (2)

Publication Number Publication Date
EP0263779A2 true EP0263779A2 (fr) 1988-04-13
EP0263779A3 EP0263779A3 (fr) 1988-06-15

Family

ID=25439206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730124A Withdrawn EP0263779A3 (fr) 1986-10-10 1987-10-09 Installation de coulée continue de métal liquide

Country Status (2)

Country Link
US (1) US4714103A (fr)
EP (1) EP0263779A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995005910A1 (fr) * 1993-08-20 1995-03-02 Paul Wurth S.A. Lingotiere de coulee continue
EP2572812A1 (fr) * 2011-09-21 2013-03-27 Siemens VAI Metals Technologies GmbH Ensemble de moule pour moulage continu

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842674A1 (de) * 1998-09-17 2000-03-23 Schloemann Siemag Ag Kokillenwand einer Stranggießkokille
DE19859040A1 (de) * 1998-12-21 2000-06-29 Km Europa Metal Ag Kokillenrohr und Verfahren zum Rekalibrieren eines Kokillenrohrs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289257A (en) * 1964-01-29 1966-12-06 United States Steel Corp Continuous casting mold having ribs
DE1296744B (de) * 1961-05-16 1969-06-04 Boehler & Co Ag Geb Stranggiesskokille
DE3207149C1 (de) * 1982-02-27 1983-07-07 Mannesmann AG, 4000 Düsseldorf Stranggiesskokille fuer fluessige Metalle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286310A (en) * 1963-10-22 1966-11-22 Olin Mathieson Continuous casting mold venting apparatus
US3528487A (en) * 1967-06-05 1970-09-15 Interlake Steel Corp Continuous casting machine
US3693697A (en) * 1970-08-20 1972-09-26 Republic Steel Corp Controlled solidification of case structures by controlled circulating flow of molten metal in the solidifying ingot
US3811490A (en) * 1971-03-16 1974-05-21 British Steel Corp Continuous casting of rimming steel
LU68861A1 (fr) * 1973-11-26 1975-08-20
JPS5345777A (en) * 1976-10-07 1978-04-24 Ishikawajima Harima Heavy Ind Co Ltd Electric dust collecting system
CH602223A5 (fr) * 1976-12-30 1978-07-31 Concast Ag
GB8407072D0 (en) * 1984-03-19 1984-04-26 Davy Mckee Sheffield Horizontal continuous casting moulds

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1296744B (de) * 1961-05-16 1969-06-04 Boehler & Co Ag Geb Stranggiesskokille
US3289257A (en) * 1964-01-29 1966-12-06 United States Steel Corp Continuous casting mold having ribs
DE3207149C1 (de) * 1982-02-27 1983-07-07 Mannesmann AG, 4000 Düsseldorf Stranggiesskokille fuer fluessige Metalle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995005910A1 (fr) * 1993-08-20 1995-03-02 Paul Wurth S.A. Lingotiere de coulee continue
GB2296460A (en) * 1993-08-20 1996-07-03 Wurth Paul Sa Continuous casting ingot mould
AU675576B2 (en) * 1993-08-20 1997-02-06 Paul Wurth S.A. Continuous casting ingot mould
GB2296460B (en) * 1993-08-20 1997-04-30 Wurth Paul Sa Ingot mould for continuous casting
CN1040954C (zh) * 1993-08-20 1998-12-02 保尔·沃特公司 连铸用结晶器
AT407352B (de) * 1993-08-20 2001-02-26 Wurth Paul Sa Stranggiesskokille
EP2572812A1 (fr) * 2011-09-21 2013-03-27 Siemens VAI Metals Technologies GmbH Ensemble de moule pour moulage continu

Also Published As

Publication number Publication date
EP0263779A3 (fr) 1988-06-15
US4714103A (en) 1987-12-22

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Inventor name: TAMBURRINO, KENNETH D.

Inventor name: POLICK, RAYMOND L.

Inventor name: BECKER, EDMUND H.