EP0294451B1 - Verfahren und vorrichtung zum kontinuierlichen giessen von metallsträngen - Google Patents

Verfahren und vorrichtung zum kontinuierlichen giessen von metallsträngen Download PDF

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Publication number
EP0294451B1
EP0294451B1 EP88900569A EP88900569A EP0294451B1 EP 0294451 B1 EP0294451 B1 EP 0294451B1 EP 88900569 A EP88900569 A EP 88900569A EP 88900569 A EP88900569 A EP 88900569A EP 0294451 B1 EP0294451 B1 EP 0294451B1
Authority
EP
European Patent Office
Prior art keywords
pressure vessel
continuous casting
casting
metal
mould
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 - Lifetime
Application number
EP88900569A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0294451A1 (de
Inventor
Wilhelm Eul
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.)
Heide Hein Engineering & Design
Original Assignee
Heide Hein Engineering & Design
Heide Hein Engineering & Design
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 Heide Hein Engineering & Design, Heide Hein Engineering & Design filed Critical Heide Hein Engineering & Design
Priority to AT88900569T priority Critical patent/ATE73369T1/de
Publication of EP0294451A1 publication Critical patent/EP0294451A1/de
Application granted granted Critical
Publication of EP0294451B1 publication Critical patent/EP0294451B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/145—Plants for continuous casting for upward 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/106—Shielding the molten jet
    • 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
    • B22D11/14—Plants for continuous casting

Definitions

  • the invention relates to a method and a device for the continuous casting of metal strands from refractory metals, in particular steel strands, with cross-sections close to the final dimensions, according to the principle of the communicating tubes, in which or in which the casting metal in each case from a pressure vessel through a sewer pipe one continuous casting mold is pressed.
  • a large number of continuous casting processes are known for the production of semi-finished products or primary material for rolling mills. Some of these processes are also used on an industrial scale. These include circular arc continuous casting plants, vertical bending continuous casting plants, die casting processes and horizontal continuous casting processes.
  • the present invention is based on a state of the art, as can be seen in the "Manual of Continuous Casting" from Herrmann Verlag Aluminum, Düsseldorf, edition 1958, page 691 with picture 1930 and page 694 with picture 1940.
  • a method of rising casting is also known (GB-A-2 116 888), which, however, is designed as a semi-continuous casting process, so that no continuously produced cast strand but metal strand castings of finite length, ie of a few meters in length, are produced.
  • the ascent of the cast will not based on the principle of communicating tubes, but by means of an unconnected liquid column.
  • the melt is discontinuously discharged from a melting furnace into a pressure-tight vessel and from there it is pressed by gas pressure onto the melt pool level and through a feed pipe into the mold.
  • the lengths of the individual pieces are determined by chilled molds.
  • the invention has for its object to design a ladle insert in such a way that the pouring pouring metal on the way to solidification is no longer exposed to reoxidation, degassing the pouring metal (including unsteady melting) immediately before the casting process to be able to make a temperature and analysis correction shortly before pouring and to achieve the control of the flow of casting metal to the continuous casting mold without additional manual or apparatus expenditure.
  • the object is achieved on the basis of the method described at the outset in that the casting metal is pressed from a higher-level storage container through the communicating sewer pipe into a pressure vessel with a gas dome, that the casting metal is passed through a vertical immersion pipe which is immersed in the casting metal through the gas dome , is transported into a substantially vertically oscillating, independent continuous casting mold and that the casting strand which is being formed is deflected in an arc from the vertical into the horizontal and drawn off.
  • This process combines the advantage of the air being completely sealed off from the casting metal until the largely solidified metal strand emerges at the exit from the continuous casting mold.
  • the metal inflow can be easily controlled by pressure control via the gas dome. With the rising casting, a dense, gap-free structure is created.
  • the casting metal can be degassed immediately before the actual casting process without significant temperature losses. There is also no slag fishing in front of the mold. According to the process, semi and unsteady steels can also be cast.
  • the device for carrying out the method is based on a pressure vessel and a continuous casting mold connected by means of a sewer pipe.
  • an exchangeable pan vessel is connected upstream of the pressure vessel via the sewer pipe, that an immersion tube is immersed through a gas dome in the casting metal located in the pressure vessel and is attached to an oscillatable continuous casting mold arranged above the pressure vessel and that a sealing compensator for the mold oscillation movement is arranged between the pressure vessel and the continuous casting mold.
  • the casting metal can advantageously be degassed during the casting process by connecting a vacuum chamber with airtight connection connections between the pan vessel and the pressure vessel.
  • the sewer pipe opens into the pressure vessel in the region of the pressure vessel bottom.
  • the shape and the length of the sewer pipe can hereby be influenced or determined or selected.
  • the cast metal level in the vacuum chamber run higher than the top of the horizontally removable metal strand.
  • the desired pressure conditions in the cast metal or in the solidifying metal strand are thereby set.
  • a casting tract is connected upstream of the pressure vessel, which has a degassing device and / or a pressure accumulator and / or an alloy addition device and / or a heating device.
  • slides are arranged next to the vacuum chamber and in front of the pressure vessel. These ensure that the pressure is maintained in parts of the system if there is a drop in pressure in other areas.
  • Another group of features consists of the fact that the pressure vessel has a considerably larger cross section than the sewer pipe or the immersion pipe. This measure allows the formation of the gas dome. Elimination and degassing processes, if desired, as well as purification processes can be facilitated.
  • An interchangeability of the dip tube is advantageously achieved and facilitated in that a frame is arranged between the compensator and the continuous casting mold, which is carried or driven by a mold oscillation drive and which also carries the continuous casting mold.
  • the formation of the cast strand or metal strand is also favored in that the continuous casting mold formed from cooled copper plates is provided at the inlet with semi-permeable strips and that these strips are provided with lubricant channels which are connected to a high-pressure lubricant pump. This reduces the friction of the metal strand and at the same time supports the detachment of the strand shell being formed.
  • a slide is arranged between the continuous casting mold and the dip tube. This measure allows the continuous casting mold to be changed without changing the immersion tube, e.g. when changing from a format of the metal strand to a new format.
  • the mold oscillation with a moving immersion tube requires new ways of construction.
  • the compensator consists of a labyrinth lower part fastened to the pressure vessel and a labyrinth upper part fastened to the continuous casting mold or to the slide, that the labyrinth lower part and the labyrinth upper part are provided with interacting teeth, the latter of which The stroke of movement corresponds to the stroke of the continuous casting mold.
  • the mold oscillation can thus advantageously be absorbed and the sealing elements are protected from damage in emergencies.
  • sealing elements are that the lower part of the labyrinth and the upper part of the labyrinth form a cylindrical, external seal. Such a seal can be better controlled.
  • the seal can be formed either in the manner of a piston ring seal or in the manner of an annular bellows.
  • the seal is cooled. Such cooling can take place from the outside or from the inside or on both sides.
  • the invention is not restricted to the use of a single-core continuous casting installation. It is therefore proposed that several parallel metal strands can be generated, wherein one or two pan vessels are provided and that a track runs in front of the continuous casting molds across the metal strands, on which one or more manipulators for changing continuous casting molds, compensators or dip tubes can be moved. Only one casting section is therefore necessary for all continuous casting molds. This arrangement also allows casting to be interrupted on any strand without having to stop pouring on the other strands.
  • an emergency casting device is arranged under the pressure vessel or the connected sewer pipe.
  • the casting metal flows from a pan vessel 1, regulated by a pan slide 2, into a one arranged below the pan vessel 1 Vacuum chamber 3.
  • the vacuum chamber 3 is connected to a machine (not shown) that generates the vacuum by means of a suction pipe 4.
  • An alloy addition device 5 for alloying agents and / or scrap is also provided on the vacuum chamber 3.
  • a gas-permeable insert 6 is arranged in the bottom region of the vacuum chamber 3.
  • a slide 7 arranged in the bottom area forms the bottom closure of the vacuum chamber 3 at the beginning of the casting process and, if necessary.
  • a sewer pipe 8 made of refractory material, which consists of a vertically downward section 8a, a horizontal section 8b and a vertically upward section 8c.
  • the sewer pipe 8 is provided at a suitable point with a heating device 36 in order to heat up the casting metal if necessary.
  • a closure device 11 is provided in the region of the deflection of the section 8b into the section 8c which, if necessary, enables the drainage of the sewer pipe 8.
  • the end of section 8c is formed by a slide 12. This slide 12 can also serve as a bottom closure of a pressure vessel 13. It is also possible to provide a second slide.
  • the pressure vessel 13 is used to hold the liquid casting metal shortly before entering a dip tube 14, which in turn feeds the casting metal to a continuous casting mold 15, which can basically consist of an arcuate casting mold or also of a straight continuous casting mold. There are special advantages associated with both systems.
  • the dip tube 14 is designed according to the format of the metal strand 10 to be cast or the corresponding continuous casting mold 15.
  • the pressure vessel 13 is enlarged in cross section with respect to the sewer pipe 8 and is under a gas pressure which is built up in a gas dome 20 and which hates the continuous casting mold 15 and a mold oscillation drive 30 partially compensated. Furthermore, the enlarged cross-section serves to calm the flow of the casting metal and to separate metal-accompanying substances, which are drawn off from time to time.
  • the gas pressure depends on the distance of the cast metal mirror 9 above the top of the horizontally removable metal strand 10.
  • a compensator 16 and a slide 17 are arranged above the pressure vessel 13.
  • the compensator 16 compensates for the mold stroke in relation to the fixed pressure vessel 13 and consists of a lower labyrinth part 16a and an upper labyrinth part 16b.
  • the gas-tight closure of lower part 16a and upper part 16b is achieved by means of piston rings 16d.
  • the lower part 16a and the upper part 16b are supplied with coolant via a line system 16e.
  • the gas pressure established in the pressure vessel 13 is controlled and monitored via a gas line 16f.
  • the labyrinth upper part 16b automatically falls on the labyrinth lower part 16a and, as a result of a toothing 16g, blocks the flow of the casting metal and prevents the piston rings 16d from being damaged.
  • the lower labyrinth part 16a and the upper labyrinth part 16b form a cylindrical, outer seal 16h (FIG. 4).
  • This seal 16h is formed either in the manner of a piston seal 16d (FIG. 4) or in the manner of an annular bellows 16c (FIG. 5).
  • the lower labyrinth part 16a and the upper labyrinth part 16b are connected by means of a flexible element, ie with a ring collar 16c, which is protected from damage by the toothing 16g.
  • the pressure vessel 13 has a gas inlet 18 and a slag tapping device 19.
  • the continuous casting mold 15 is equipped with a second slide, not shown, which lies above the slide 17.
  • the continuous casting mold 15 also has copper plates 22 (FIG. 2) which form the format for the metal strand. They can be designed for a block, tube or plate continuous casting mold 15 and are cooled from the outside.
  • semipermeable strips 23 are arranged in a ring, which serve to supply and distribute suitable lubricants.
  • the strips 23 have channels 24.
  • the channels 24 are segmented and are supplied with lubricant through a line 38 by means of a multi-cylindrical injection pump (not shown).
  • an internally cooled frame 26 which is carried or driven by the mold oscillation drive 30 and which also carries the continuous casting mold 15.
  • the sewer pipe 8 runs in each case in the axis of symmetry of the continuous casting molds 15, i.e. perpendicular to the strand extraction direction 31.
  • two ladle containers 1 are expediently provided on the left and right of the system. This enables a smooth change of the ladle vessels 1 without the need for a conventional ladle turret with inevitable ladle changing times.
  • the mold oscillation drive 30 and segment drives are located under the strand discharge 37.
  • a slag receiving device 32 which can be moved transversely to the metal strands 10, is provided directly next to the slag accumulating in the pressure vessel 13.
  • a tapping device 33 is provided for receiving the casting metal from the casting tract in an emergency and for other cases. It can be moved across by means of a trolley 34 and is disposed of outside the casting area by crane.
  • a reel device 35 is provided in the strand discharge 36 for handling thin metal strands 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Wire Processing (AREA)
EP88900569A 1986-12-22 1987-12-19 Verfahren und vorrichtung zum kontinuierlichen giessen von metallsträngen Expired - Lifetime EP0294451B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88900569T ATE73369T1 (de) 1986-12-22 1987-12-19 Verfahren und vorrichtung zum kontinuierlichen giessen von metallstraengen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3643940 1986-12-22
DE3643940 1986-12-22
DE19873736956 DE3736956A1 (de) 1986-12-22 1987-10-31 Verfahren und vorrichtung zum kontinuierlichen giessen von metallstraengen aus hochschmelzenden metallen, insbesondere von stahlstraengen
DE3736956 1987-10-31

Publications (2)

Publication Number Publication Date
EP0294451A1 EP0294451A1 (de) 1988-12-14
EP0294451B1 true EP0294451B1 (de) 1992-03-11

Family

ID=25850709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88900569A Expired - Lifetime EP0294451B1 (de) 1986-12-22 1987-12-19 Verfahren und vorrichtung zum kontinuierlichen giessen von metallsträngen

Country Status (10)

Country Link
US (1) US4932462A (pt)
EP (1) EP0294451B1 (pt)
JP (1) JPH01501605A (pt)
KR (1) KR920000808B1 (pt)
AT (1) ATE73369T1 (pt)
AU (1) AU597780B2 (pt)
BR (1) BR8707607A (pt)
DE (2) DE3736956A1 (pt)
RU (1) RU2056216C1 (pt)
WO (1) WO1988004586A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003095A1 (de) * 1990-02-02 1991-08-08 Bayerische Motoren Werke Ag Druckgussanlage

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1060910A (fr) * 1952-05-21 1954-04-07 Usinor Procédé et installation pour la coulée en continu de metaux et autres produits
GB967699A (en) * 1963-01-14 1964-08-26 James Nelson Wognum Continuous casting
US3467168A (en) * 1966-04-25 1969-09-16 Oglebay Norton Co Continuous casting apparatus and method including mold lubrication,heat transfer,and vibration
US3467167A (en) * 1966-09-19 1969-09-16 Kaiser Ind Corp Process for continuously casting oxidizable metals
DE1758133A1 (de) * 1968-04-08 1970-12-23 Schloemann Ag Aus Durchlaufkokille und Zwischenbehaelter bestehende Stranggiesseinrichtung
JPS4976449A (pt) * 1972-11-27 1974-07-23
FR2253587B1 (pt) * 1974-12-23 1978-11-03 Ural Krasnog
JPS58112636A (ja) * 1981-12-25 1983-07-05 Nippon Steel Corp リムド鋼の連続鋳造方法及び装置
SE443524B (sv) * 1982-02-12 1986-03-03 Uralsky Politekhn Inst Halvkontinuerlig gjutmaskin
CA1152169A (en) * 1982-08-25 1983-08-16 Adrian V. Collins Temperature compensated resonant cavity
FR2548935B1 (fr) * 1983-07-12 1986-07-11 Pont A Mousson Procede et installation pour la coulee continue d'un tuyau en fonte a emboitement
FR2557820B1 (fr) * 1984-01-10 1987-05-07 Pont A Mousson Dispositif d'alimentation en metal liquide pour installation de coulee continue verticale d'un tube metallique, notamment en fonte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, vol. 6, no 178 (M-155)(1056), 11 September 1982, & JP,A,5785655 (KAWASAKI SEITETSU K.K.) 28 May 1982 *

Also Published As

Publication number Publication date
KR920000808B1 (ko) 1992-01-23
AU1089788A (en) 1988-07-15
JPH01501605A (ja) 1989-06-08
ATE73369T1 (de) 1992-03-15
BR8707607A (pt) 1989-10-03
DE3736956C2 (pt) 1990-06-21
KR890700412A (ko) 1989-04-24
AU597780B2 (en) 1990-06-07
DE3736956A1 (de) 1988-07-07
RU2056216C1 (ru) 1996-03-20
DE3777406D1 (de) 1992-04-16
US4932462A (en) 1990-06-12
WO1988004586A1 (en) 1988-06-30
EP0294451A1 (de) 1988-12-14

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