US20040079512A1 - Installation for producing a hot-rolled strip - Google Patents

Installation for producing a hot-rolled strip Download PDF

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Publication number
US20040079512A1
US20040079512A1 US10/467,743 US46774303A US2004079512A1 US 20040079512 A1 US20040079512 A1 US 20040079512A1 US 46774303 A US46774303 A US 46774303A US 2004079512 A1 US2004079512 A1 US 2004079512A1
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US
United States
Prior art keywords
casting
tundish
roll
plant
twin
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.)
Abandoned
Application number
US10/467,743
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English (en)
Inventor
Gerald Hohenbichler
Manfred Leutgöb
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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 Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Assigned to VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH reassignment VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOHENBICHLER, GERALD, LEUTGOB, MANFRED
Publication of US20040079512A1 publication Critical patent/US20040079512A1/en
Abandoned legal-status Critical Current

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    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B22D11/147—Multi-strand plants
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels

Definitions

  • the invention relates to a plant for producing hot strip from a metal melt in accordance with the twin-roll casting process using two twin-roll casting devices.
  • a plant of this type for producing thin, near net shape hot strip, preferably steel strip, in accordance with the twin-roll casting process substantially comprises two driven, oppositely rotating casting rolls which are arranged at a distance from one another and the axes of rotation of which lie in a horizontal plane. They form a casting nip, the lateral boundary of which is formed by side plates pressed onto the casting rolls at the end sides. Side plates which can be pressed vertically onto the casting roll lateral surfaces are also known for this purpose. The two casting rolls and the side plates form a melt space into which metal melt is introduced through a submerged casting nozzle.
  • the metal strip which is discharged vertically downward, is then diverted into the horizontal plane, is subjected to further processing steps in downstream treatment devices and is wound into metal coils.
  • a plant which uses the twin-roll casting process described is already known from AT-B 406 938.
  • Two twin-roll casting plants arranged parallel next to one another are independently supplied with melt, each twin-roll casting plant being assigned a separate ladle turntable and a separate tundish.
  • the metal strip produced is wound into coils and the coils from the two casting plants are conveyed to a further rolling plant, where they are processed further. This plant arrangement doubles the production capacity.
  • the strip casting speed is limited to 15 to 150 m/min for a strip thickness of 1.5 to 5 mm by the dissipation of heat, which is limited in terms of time and to a short path length on the casting roll surface. Consequently, the production capacity which can be achieved at a plant of this type is limited to between approx. 0.5 and 1.5 t/min and meter strip width. This corresponds to a maximum production capacity of 100 t/h for a standard one-stranded plant for casting widths of up to 1300 mm.
  • the individual cast strands are removed at identical angular intervals in beam form.
  • the problem of arranging two permanent molds for casting strands with strip cross sections and high length/width ratios with a limited tundish size does not arise.
  • tundishes with a longitudinal extent of more than 10 m are scarcely technically viable, leading to very high volumes of metal and very large wetted refractory lining surface areas in relation to the total throughput of the two twin-roll casting devices and therefore to an increased consumption of refractory material and to yield losses.
  • a further object of the invention is to avoid these drawbacks and difficulties and to propose a casting plant which operates according to the twin-roll casting process and with which it is possible to significantly increase the melt throughput in the tundish to above the capacity limit of a one-strand casting plant operating in accordance with the twin-roll casting process and, at the same time, to significantly reduce the batch casting times.
  • a further object of the invention is to ensure that the conditions for the metal melt, in particular relating to constancy of casting temperature over the casting time, are met without additional heating and to keep the dimensions of the tundish, in particular the distance between the bottom outlets, small.
  • a further object of the invention is to find a plant configuration in which the maximum number of plant components are used together in a plurality of production lines.
  • this object is achieved through the fact that a casting ladle with a melt outlet is assigned a tundish for receiving the metal melt from the casting ladle, that this single tundish is equipped with at least two bottom outlets for transferring the metal melt to two twin-roll casting devices, in that each casting nip is assigned at least one of the bottom outlets of the tundish, and the two casting nips are arranged at an angle ⁇ of 15° to 180°, preferably of 45° to 120°, in particular of 60° to 120°, with respect to one another in terms of their longitudinal extents.
  • a favorable arrangement results if the two casting nips are arranged at an angle ⁇ of approximately 90° with respect to one another in terms of their longitudinal extents.
  • each twin-roll casting device forms a production line with the strip treatment devices arranged downstream of it and the production lines which are supplied with metal melt from a common tundish are arranged at an angle of 15° to 180°, preferably of 45° to 120°, in particular of 60° to 120°, with respect to one another.
  • the angular position of the two production lines with respect to one another enables them to be brought closer together in the region of the actual twin-roll casting device, and the distance between the central supply positions for the metal melt is minimized, thereby shortening the length of the tundish.
  • a preferred plant arrangement results if the production lines which are supplied with metal melt by a common tundish are arranged at an angle ⁇ of approximately 90° with respect to one another.
  • An arrangement of two twin-roll casting devices which likewise reduces or minimizes the length of the tundish results, compared to an arrangement of two twin-roll casting devices positioned next to one another with aligned casting nips, if the two casting nips are arranged parallel and offset with respect to one another in terms of the their longitudinal extents. It is preferable for the production lines which are supplied with metal melt by a common tundish to be arranged so as to lead away from one another.
  • the arrangement of the casting nips and/or production lines in accordance with the invention proves particularly advantageous if at least one roll stand is arranged downstream of each twin-roll casting device.
  • rolling stands need space for the drive units of the rolls and on the operating side need space for roll changeover devices.
  • Preferred angular positions of the production lines with respect to one another make it possible to arrange roll changeover stations, the associated bearing equipment and if appropriate also the roll grinding mill in a spatially enclosed area of the production hall between the two rolling stands.
  • An efficient casting ladle arrangement is achieved if the casting ladle is supported in a bearing device, if this bearing device is formed by a ladle turntable which can rotate about a vertical axis and has at least two receptacles for casting ladles, and the melt outlet from the casting ladle, in the casting position, is arranged approximately centrally above the tundish, preferably centrally in the region of a projecting limb of a T-shaped tundish.
  • the tundish may also be of trough-like or V-shaped design and can in this way be equated to the T-shaped tundish.
  • the metal melt is transferred from the tundish to the twin-roll casting plant in a manner which does not disrupt the formation of strand shells at the casting roll surfaces if the bottom outlets in the tundish comprise submerged casting nozzles which project centrally into a free melt-receiving space between two interacting casting rolls of the twin-roll casting devices.
  • the bottom outlets in the tundish are at a distance of no more than 8.5 m apart.
  • FIG. 1 shows a longitudinal section through a plant for implementing the two-roll casting process in accordance with the prior art
  • FIG. 2 a shows a plan view of the plant according to the invention with two production lines arranged at an angle of 90°
  • FIG. 2 b defines the angles ⁇ and ⁇ in the arrangement according to the invention
  • FIG. 3 a shows a plan view of this plant with two production lines arranged at an angle of 180°
  • FIG. 3 b diagrammatically depicts a plan view of a variant of the arrangement shown in FIG. 3 a.
  • FIG. 1 An overall plant for producing a steel strip from a steel melt using the twin-roll casting process which has already been described in the introduction, as conventionally used in accordance with the prior art, is diagrammatically depicted in longitudinal section in FIG. 1, which is restricted to the most important components of the plant.
  • Casting ladles 1 filled with steel melt are transferred from the melting works to the casting plant using metallurgical vehicles or a hall crane (not shown) and are then inserted into receptacles 2 of a ladle turntable 4 which can rotate about a vertical axis 3 .
  • the twin-roll casting device 10 is substantially formed by two driven, oppositely rotating casting rolls 11 , 12 supported in bearings in a bearing frame (not shown).
  • the casting rolls 11 , 12 which are arranged at an adjustable distance with respect to one another, together with side plates arranged at the end sides (not shown in FIG.
  • the metal strip 15 is then discharged from the casting nip 13 , diverted into the horizontal plane, conveyed onward by pinch roll pairs 16 , 17 to a rolling stand 18 , where they are held under tension.
  • the metal strip 15 is cooled as it passes through cooling devices 19 , transversely divided according to required coil weights by means of shears 20 and wound into coils in a coiler 21 .
  • Further devices such as a looping pit for compensating for different speeds between individual production devices, trimming shears for treating the edges of the metal strip, evacuation chambers for preventing the formation of scale on the metal strip, reheating devices, etc. are usually integrated in plants of this nature.
  • FIG. 2 a One possible embodiment of an arrangement of two production lines 23 , 24 incorporating in each case one twin-roll casting device 10 a , 10 b of the type described above for carrying out the vertical twin-roll casting process is illustrated in FIG. 2 a .
  • the two production lines 23 , 24 are arranged at an angle ⁇ of 90° with respect to one another.
  • the casting nips 13 a , 13 b which are arranged offset by an angle ⁇ of 90° with respect to one another, of the twin-roll casting devices 10 a , 10 b having the casting rolls 11 a , 12 a and 11 b , 12 b are covered by a tundish 6 which extends obliquely across the two twin-roll casting devices 10 a , 10 b and are supplied with metal melt.
  • the bottom outlets 8 a , 8 b are each positioned precisely above the casting nips 13 a , 13 b of the twin-roll casting devices 10 a , 10 b and ensure symmetrical introduction of the metal melt into the melt receiving space 14 (FIG. 1).
  • the ladle turntable 4 has been used to move the casting ladle 1 into a casting position above the tundish 6 , in which the metal melt flows into a projecting limb 25 of the T-shaped tundish 6 .
  • Similar strip treatment devices are arranged in both production lines 23 , 24 , of which strip treatment devices in each case only a rolling stand 18 a , 18 b for reducing the thickness, improving the microstructure, smoothing the surface etc. of the metal strip and the coilers 21 a , 21 b are illustrated in the diagrammatic representation of FIG. 2 a .
  • areas for the roll changeover stations 30 a , 30 b and if appropriate further areas (not described in more detail) for the common bearing of roll sets and the roll grinding mill are provided in the area of the hall between the two adjacent production lines 23 , 24 .
  • FIG. 2 b diagrammatically depicts the casting nips 13 a , 13 b of the two casting-roll devices at an angle ⁇ of 60°.
  • the angle ⁇ between the two production lines 23 , 24 is likewise 60°, with the result that the casting nips 13 a , 13 b are always positioned normally with respect to the orientation of the production line 23 , 24 .
  • Angular positions ⁇ and ⁇ which differ from one another are also possible but require strip-diverting devices to be arranged in or at the start of the production lines 23 , 24 .
  • FIG. 3 a shows a further possible embodiment of an arrangement of two production lines 23 , 24 incorporating in each case one twin-roll casting device 10 a , 10 b for carrying out the vertical twin-roll casting process, the casting nips 13 a , 13 b , the twin-roll casting devices 10 a , 10 b and the production lines 23 , 24 being arranged at an angle of 180°, i.e. parallel and offset with respect to one another.
  • the ladle turntable 4 and the tundish 6 starting from which the two production lines 23 , 24 are oriented in opposite directions, are in this case positioned in the center of the plant, and accordingly the cast strip passes through the production lines in opposite directions.
  • FIG. 3 b shows a variant of the plant arrangement illustrated in FIG. 3 a , in which the production lines 23 , 24 and accordingly also the casting nips 13 a , 13 b and the casting-roll devices are arranged parallel and laterally offset with respect to one another.
  • the invention is not restricted to the embodiments illustrated.
  • the individual plant components can be used in various modified forms. It is within the scope of protection of the invention to provide other floor-mounted bearing devices for the casting ladles, such as for example displaceable ladle carriages, instead of the ladle turntable.
  • a casting crane from which the casting ladle is suspended can also be used, replacing the ladle turntable.
  • it is possible to modify the shape of the tundishes so that they may also be designed as substantially rectangular troughs or as V-shaped tundishes. Modifications to the form of the tundish of this nature are likewise covered by the scope of protection of a T-shaped tundish.
  • a multi-stand rolling device can be used in the individual production lines in order to achieve higher reduction rates.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
US10/467,743 2001-02-12 2002-01-30 Installation for producing a hot-rolled strip Abandoned US20040079512A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA209/2001 2001-02-12
AT0020901A AT409830B (de) 2001-02-12 2001-02-12 Anlage zur herstellung eines warmbandes
PCT/EP2002/000935 WO2002064289A1 (de) 2001-02-12 2002-01-30 Anlage zur herstellung eines warmbandes

Publications (1)

Publication Number Publication Date
US20040079512A1 true US20040079512A1 (en) 2004-04-29

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ID=3669665

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/467,743 Abandoned US20040079512A1 (en) 2001-02-12 2002-01-30 Installation for producing a hot-rolled strip

Country Status (8)

Country Link
US (1) US20040079512A1 (ja)
EP (1) EP1360023A1 (ja)
JP (1) JP2004520171A (ja)
KR (1) KR20030071890A (ja)
CN (1) CN1501847A (ja)
AT (1) AT409830B (ja)
MX (1) MXPA03007155A (ja)
WO (1) WO2002064289A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUD20130128A1 (it) * 2013-10-04 2015-04-05 Danieli Off Mecc Impianto siderurgico a linea di co-laminazione multipla e relativo metodo di produzione
US20150190863A1 (en) * 2012-06-29 2015-07-09 Baoshan Iron & Steel Co., Ltd. Control Method and Apparatus for Continuous Casting Steel Pouring
EP3055082B1 (en) 2013-10-04 2018-06-13 Danieli & C. Officine Meccaniche, S.p.A. Steel plant for the production of long metal products and corresponding production method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH695669A5 (de) * 2002-01-10 2006-07-31 Main Man Inspiration Ag Verfahren zum Betrieb einer Bandgiessanlage mit einer Zweirollen-Bandgiessmaschine.
EP3885060A1 (de) * 2020-03-25 2021-09-29 Primetals Technologies Austria GmbH Stranggiessanlage und verfahren zum betreiben der stranggiessanlage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5548882A (en) * 1991-06-25 1996-08-27 Didier Ofu Engineering Gmbh Storage oven for thin slab casting

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1908648A1 (de) * 1969-02-21 1971-04-29 Suedwestfalen Ag Stahlwerke Mehrfach-Stranggussanlage
DE3821188A1 (de) * 1988-06-23 1989-12-28 Schloemann Siemag Ag Bandgiessanlage mit drehherdofen
GB8903873D0 (en) * 1989-02-21 1989-04-05 Davy Distington Ltd Continuous casting of metal workpieces
AT406938B (de) * 1997-12-18 2000-10-25 Voest Alpine Ind Anlagen Anlage und verfahren zum herstellen von gewalztem band

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5548882A (en) * 1991-06-25 1996-08-27 Didier Ofu Engineering Gmbh Storage oven for thin slab casting

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150190863A1 (en) * 2012-06-29 2015-07-09 Baoshan Iron & Steel Co., Ltd. Control Method and Apparatus for Continuous Casting Steel Pouring
US10369624B2 (en) * 2012-06-29 2019-08-06 Baoshan Iron & Steel Co., Ltd Control method and apparatus for continuous casting steel pouring
ITUD20130128A1 (it) * 2013-10-04 2015-04-05 Danieli Off Mecc Impianto siderurgico a linea di co-laminazione multipla e relativo metodo di produzione
WO2015049663A1 (en) 2013-10-04 2015-04-09 Danieli & C. Officine Meccaniche Spa Steel plant with multiple co-rolling line and corresponding method of production
EP3052259B1 (en) 2013-10-04 2017-11-29 Danieli & C. Officine Meccaniche, S.p.A. Steel plant with multiple co-rolling line and corresponding method of production
EP3055082B1 (en) 2013-10-04 2018-06-13 Danieli & C. Officine Meccaniche, S.p.A. Steel plant for the production of long metal products and corresponding production method
RU2676113C2 (ru) * 2013-10-04 2018-12-26 Даньели И К. Оффичине Мекканике Спа Сталеплавильная установка с множественными комбинированными прокатными линиями и соответствующий способ производства
US10357821B2 (en) 2013-10-04 2019-07-23 Danieli & C. Officine Meccaniche Spa Steel plant with multiple co-rolling line and corresponding method of production

Also Published As

Publication number Publication date
WO2002064289A1 (de) 2002-08-22
MXPA03007155A (es) 2004-05-05
CN1501847A (zh) 2004-06-02
KR20030071890A (ko) 2003-09-06
JP2004520171A (ja) 2004-07-08
EP1360023A1 (de) 2003-11-12
AT409830B (de) 2002-11-25
ATA2092001A (de) 2002-04-15

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AS Assignment

Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOHENBICHLER, GERALD;LEUTGOB, MANFRED;REEL/FRAME:014881/0567

Effective date: 20030808

STCB Information on status: application discontinuation

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