EP0107069A1 - Verfahren zum Stranggiessen von Metallen, insbesondere von Stahl und Stranggiessanlagen dazu - Google Patents

Verfahren zum Stranggiessen von Metallen, insbesondere von Stahl und Stranggiessanlagen dazu Download PDF

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Publication number
EP0107069A1
EP0107069A1 EP83109550A EP83109550A EP0107069A1 EP 0107069 A1 EP0107069 A1 EP 0107069A1 EP 83109550 A EP83109550 A EP 83109550A EP 83109550 A EP83109550 A EP 83109550A EP 0107069 A1 EP0107069 A1 EP 0107069A1
Authority
EP
European Patent Office
Prior art keywords
strand
mold
curved
guideway
curvature
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Withdrawn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
EP83109550A
Other languages
German (de)
English (en)
French (fr)
Inventor
Herbert Fastert
Carl Langner
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.)
Concast Inc
Original Assignee
Concast Inc
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 Concast Inc filed Critical Concast Inc
Publication of EP0107069A1 publication Critical patent/EP0107069A1/de
Withdrawn legal-status Critical Current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
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/0455—Bidirectional horizontal casting

Definitions

  • the invention relates to a process for the continuous casting of metals, in particular steel, steel being introduced from above into a substantially horizontally extending mold and a partially solid strand being drawn out, guided and further cooled from at least one lateral outlet opening of the mold, and continuous casting plants therefor.
  • the mold arrangement consists of a straight and a curved part.
  • the intention is that a tear-off point is formed at the transition from the straight to the curved part of the mold, since the weakest, hottest and thinnest point of the strand shell should be located there.
  • strands emerge from the inclined straight mold part and the likewise inclined curved mold part, the longitudinal axis of which forms an angle with the horizontal.
  • the disadvantage of this arrangement is that the mold cannot be oscillated, since the strand shell formed in one mold part cannot be pushed into the other mold part. As a result, there is too much friction between the mold and the strand formed, and breakthroughs occur. This disadvantage is exacerbated by the fact that the strand has to be constantly forcibly separated at a certain tear-off point.
  • a partially solidified strand can be conveyed out of only one lateral outlet opening of the mold. In order to achieve higher production, however, it is advantageous to convey partially solidified strands out of both lateral, opposite outlet openings of the mold.
  • the oscillated mold used can have a straight or curved mold cavity and the metal can be introduced from above with or without a pouring tube.
  • the partially rigid strand emerging laterally from a mold with a straight mold cavity can run through a short, straight guideway before it is bent downwards.
  • a straight guideway can be connected to the first curved strand guide for metallurgical reasons.
  • the partially solidified strand is subjected to water or an air-water mixture during cooling after it has left the mold via cooling devices and is cooled further.
  • the thickness of the solidified strand shell increases. Since the strand can be curved more with increasing strand shell thickness, it is advantageous, for example to reduce the overall height, to guide the strand in the two curved guideways with a different radius of curvature. For the same reason, it can be advantageous to have at least one of these guideways to provide several different radii of curvature.
  • D a-in strand example, in the first curved guide track out with decreasing radii of curvature or be bent, and in the subsequent second curved guide track of the radius of curvature can increase again until the strand by a leveling unit in a straight shape with radius of curvature is directed to infinity. Then it can be conveyed horizontally or on an inclined plane.
  • a downwardly curved guide part can be sufficient to achieve the desired effect.
  • Strands of different formats can be cast according to the invention. It can be advantageous to cast two different formats on one system at the same time, e.g. on the right side of the plant a slab with a rectangular cross section and on the left side of the plant two blocks with a square cross section, in which case different radii of curvature can be used. So go through e.g. the blooms a first curved guideway with a radius that is larger than the radius of a second guideway adjoining it. The slab discharged in the opposite direction can be progressively guided along a curve with a certain radius in the first guideway and with increasing radii in the second curved guideway.
  • the continuous caster according to the invention is characterized by an essentially horizontally arranged mold, which has a pouring opening for the introduction of liquid steel on its upper mold wall and has at least one outlet opening for a partially solidified strand, a strand guide for each of these strands contains two strand guideways curved in the opposite direction, the center of curvature of the first guideway in the direction of strand running below this path of the second of this path and the center of curvature of the second curved guideway above its associated path.
  • a short, straight strand guideway can be provided in front of and / or in front of the first curved strand guideway.
  • the part of the strand guide track following the outlet openings can advantageously have the same radius of curvature as the upstream mold cavity.
  • a drive and / or straightening unit can be arranged downstream of the second curved strand guide track, as seen in the strand running direction.
  • metal in particular steel, is transferred from a pan 1 via a ladle pouring tube 2 into an intermediate container 3 and from there via a pouring tube 4 into a water-cooled, metal mold 5 provided with two outlet openings.
  • the metal inflow is in each case via regulating devices (not shown) , such as Plug and / or slide, controlled.
  • the pouring tube 4 extends through a pouring opening 20 of the upper mold wall 5a of the mold 5 and is immersed in the mold 5 under the bath level of the steel.
  • the steel is introduced through the pouring tube 4 into the mold cavity 5b of the mold in such a way that no strand shell 5c can form along the mold wall in the immediate inflow region. This ensures that both strands 30 and 30 ', formed in the mold 5, can be conveyed out of this mold independently of one another in the opposite direction.
  • the mold 5 has a curved mold cavity 5b and is oscillated along an arc via an oscillation device 10 with an eccentric drive. Of course other known oscillation devices can also be used. The oscillated mold is guided over handlebar 100.
  • each of these strand guides has a number of strand guide tracks 40, 41 ', 42 and 40', 41 'and 42', the extent of which is represented by vertical, dashed lines. 1, the two strand guides 15 and 15 'are arranged symmetrically to one another.
  • the strand is guided along the curved strand guide track 40, the center of the associated radius of curvature 44 being below this strand guide track 40.
  • the radius of curvature 44 corresponds approximately to the radius of the circular arc on which the mold 5 is oscillated.
  • This second curved strand path 40 is followed by the second curved strand path 41, the center of curvature 45 of its radius of curvature 46 being above this strand guide path 41, and the radius of curvature 46 roughly corresponding to the radius of curvature 44 of the first curved strand guide path 40.
  • the strand is guided by rollers 12 and by; Coolant emerging from spray nozzles 13 is further cooled. If a breakthrough occurs on this semi-horizontal system, no significant amount of steel flows out of the strand part lying in the strand running direction after the breakthrough point.
  • the two partially solidified strands 30 and 30 ' are pulled out from the opposite outlet openings 5b of the mold 5 by drive rollers 9 and 9'. Since both strands 30 and 30 'are not connected to one another by a strand shell, the pull-out speed of both strands can be different from each other.
  • the pouring tube 4 extends through the opening 20 provided on the upper wall 5a of the oscillating mold 5 to below the bath level in the mold.
  • the pouring tube 4 is arranged at a distance 25 from the upper mold wall. This distance 25 must be greater than the oscillation stroke of the mold 5 so that the pouring tube is not damaged during the oscillation.
  • Cooling channels 7 are provided for cooling the mold, in which cooling liquid circulates.
  • An electromagnetic coil is arranged around the pouring tube 4 on the upper wall 5a of the mold 5 above the sprue opening 20. This coil 11 generates an electromagnetic field, which causes downward forces acting on the bath level. This prevents the liquid steel from solidifying in the region of the pouring opening 20 and thereby giving rise to breakthroughs. Furthermore, the steel prevents the steel from escaping upward due to the ferrostatic pressure.
  • the pouring tube is provided with outlet openings 4a, through which hot steel is directed directly against the mold wall 5c in order to prevent the formation of a continuous strand shell along the mold wall in the intermediate region of the strands 30 and 30 '.
  • FIGS. 3 to 6 show different possibilities of how the strand tracks can run according to the invention for one or more strands.
  • the respective form is chosen according to the relevant needs, e.g. according to the type and size of the strand format to be cast, the batch weight, the space, etc.
  • liquid steel is introduced from a pouring vessel 3, for example an intermediate container, into a horizontally arranged cooled copper mold 5 which is oscillated in the direction of the double arrow along an arc of a radius R.
  • the strand is guided in a first, downwardly curved guideway 40 'with the radius of curvature R 1 and the center of curvature M 1 lying below the strand path.
  • the opposite curved guideway 41 with the radius of curvature R 2 and the center of curvature M 2 passes through. This center of curvature M 2 lies above the strand guideway 41 '.
  • the strand is then pulled out by a drive straightening unit 14 ', which has driven rollers 9', and is guided along a horizontal guideway 42 '.
  • the drive leveling unit also feeds the start-up strand necessary for closing the mold opening into the mold along the strand guide.
  • the radii of curvature R 1 and R 2 of the oppositely curved guideways 40 'and 41' have the same size here. This offers various advantages in terms of interchangeability, maintenance, etc.
  • FIG. 3 An arrangement is shown on the right-hand side of FIG. 3, in which a straight guide section 47 with an infinite radius of curvature R is provided between the two oppositely curved guide tracks 40, 41 with the radii R 3 and R 4. With this strand guide, intended for guiding and supporting a larger format, a higher ferrostatic pressure is built up in the strand.
  • a mold 5 ' With a continuous caster shown in FIG. 4 on the left, a mold 5 'with a curved mold cavity and a radius R 1 is connected to an oscillating mold 5 with a curved mold cavity.
  • a strand guide track 48' which has different radii of curvature R 5, R 6 and R 7.
  • R 5 radii of curvature
  • R 6 radii of curvature
  • R 7 radii of curvature
  • the partially solidified strand after it emerges from the mold, is initially guided along a horizontal strand path 50 ', with a radius of curvature R infinite. This is followed by a guide track curved in the opposite direction in accordance with 41 'of FIG. 3 or 48' in accordance with FIG. 4 with a subsequent driving directional unit 14 'in the horizontal part.
  • FIG. 5 On the right side of FIG. 5 is shown schematically that the strand by a short horizontal strip guide member 50 is guided in a downward curving portion 51, a plurality of radii of curvature R 7, R 6, R 5 has the g-directional in Stran progressively can lose weight. After an intermediate straight but inclined part 47, the strand is guided along a second curved strand guide path 48 with the radii R 5, R 6, R 7, which can increase progressively in the direction of the strand.
  • a horizontal part with a drive leveling unit 14 follows.
  • the mold has rectilinear mold cavities 56 'which are inclined at an angle to one another. This is followed by the strand guideways 52, 52 ', which form an angle 53 with the horizontal.
  • the mold oscillates on a circular arc 110 with the radius R and the strand tracks 52 and 52 'form 5 tangents to this circular arc in the outlet openings of the mold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP83109550A 1982-09-27 1983-09-26 Verfahren zum Stranggiessen von Metallen, insbesondere von Stahl und Stranggiessanlagen dazu Withdrawn EP0107069A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US425119 1982-09-27
US06/425,119 US4566526A (en) 1982-09-27 1982-09-27 Method and apparatus for semi-horizontal continuous casting

Publications (1)

Publication Number Publication Date
EP0107069A1 true EP0107069A1 (de) 1984-05-02

Family

ID=23685241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109550A Withdrawn EP0107069A1 (de) 1982-09-27 1983-09-26 Verfahren zum Stranggiessen von Metallen, insbesondere von Stahl und Stranggiessanlagen dazu

Country Status (4)

Country Link
US (1) US4566526A (ko)
EP (1) EP0107069A1 (ko)
JP (1) JPS59137159A (ko)
CA (1) CA1204576A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6693609B2 (en) * 2000-12-05 2004-02-17 Lg Electronics Inc. Method of generating optimal pattern of light emission and method of measuring contour noise and method of selecting gray scale for plasma display panel

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693299A (en) * 1986-06-05 1987-09-15 Westinghouse Electric Corp. Continuous metal casting apparatus
JP2581077B2 (ja) * 1987-06-09 1997-02-12 ダイキン工業株式会社 フッ化ビニリデン系樹脂組成物
DE3925939A1 (de) * 1989-08-03 1991-02-07 Mannesmann Ag Stranggiessanlage mit einer kokillenoszillationsvorrichtung
CN1042001C (zh) * 1992-11-11 1999-02-10 山东烟台造锁总厂 一种多头水平连续铸造装置
DE19652088A1 (de) * 1996-12-14 1998-06-18 Schloemann Siemag Ag Verfahren und Vorrichtung zum Walzen von Knüppeln
DE19915269A1 (de) * 1999-04-03 2000-10-26 Sms Demag Ag Verfahren zur Bestimmung der Reibung zwischen Strangschale und Kokille beim Stranggießen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281903A (en) * 1964-02-03 1966-11-01 Walter C Ross Method and apparatus for continuous horizontal casting
US3472309A (en) * 1968-08-16 1969-10-14 Calderon Wellman Ltd Method of and apparatus for continuously casting steel
SU578155A1 (ru) * 1976-06-09 1977-10-30 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Машина дл непрерывного лить металла

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367399A (en) * 1965-06-16 1968-02-06 Koppers Co Inc Continuous casting apparatus
US3709285A (en) * 1970-09-16 1973-01-09 Olsson E Ag Method and apparatus for guiding a continuous casting strand
SU899249A1 (ru) * 1980-02-20 1982-01-23 Норильский Вечерний Индустриальный Институт Машина непрерывного лить заготовок
EP0036777A1 (en) * 1980-03-26 1981-09-30 Irving Rossi Horizontal continuous casting machine
FR2480156A2 (fr) * 1980-04-15 1981-10-16 Creusot Loire Dispositif de coulee continue de metaux, notamment d'acier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281903A (en) * 1964-02-03 1966-11-01 Walter C Ross Method and apparatus for continuous horizontal casting
US3472309A (en) * 1968-08-16 1969-10-14 Calderon Wellman Ltd Method of and apparatus for continuously casting steel
SU578155A1 (ru) * 1976-06-09 1977-10-30 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Машина дл непрерывного лить металла

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6693609B2 (en) * 2000-12-05 2004-02-17 Lg Electronics Inc. Method of generating optimal pattern of light emission and method of measuring contour noise and method of selecting gray scale for plasma display panel

Also Published As

Publication number Publication date
JPS59137159A (ja) 1984-08-07
CA1204576A (en) 1986-05-20
JPH0411287B2 (ko) 1992-02-28
US4566526A (en) 1986-01-28

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Inventor name: LANGNER, CARL

Inventor name: FASTERT, HERBERT