US20120006502A1 - System and method for casting and rolling metal - Google Patents

System and method for casting and rolling metal Download PDF

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Publication number
US20120006502A1
US20120006502A1 US13/257,088 US201013257088A US2012006502A1 US 20120006502 A1 US20120006502 A1 US 20120006502A1 US 201013257088 A US201013257088 A US 201013257088A US 2012006502 A1 US2012006502 A1 US 2012006502A1
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United States
Prior art keywords
casting
slabs
installation
thin
rolling
Prior art date
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Abandoned
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US13/257,088
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English (en)
Inventor
Jörg BAUSCH
Lothar Fischer
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SMS Siemag AG
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SMS Siemag AG
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Filing date
Publication date
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Assigned to SMS SIEMAG AKTIENGESELLSCHAFT reassignment SMS SIEMAG AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FISCHER, LOTHAR, BAUSCH, JORG
Publication of US20120006502A1 publication Critical patent/US20120006502A1/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
    • B22D11/14—Plants for continuous casting
    • B22D11/141—Plants for continuous casting for vertical 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
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical 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
    • B22D11/043—Curved 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
    • B22D11/04—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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
    • 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
    • B22D11/142—Plants for continuous casting for curved 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
    • B22D11/14—Plants for continuous casting
    • B22D11/143—Plants for continuous casting 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
    • B22D11/14—Plants for continuous casting
    • B22D11/147—Multi-strand plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/18—Switches for directing work in metal-rolling mills or trains

Definitions

  • the invention concerns an installation and a method for casting and rolling metal, especially steel, by means of casting installations and a downstream rolling train.
  • thin slabs and “slabs” each refer to very thin slabs (5-35 mm thick), thin slabs (35-90 mm thick), medium-thickness slabs (90-150 mm thick), or near-net strip (20-50 mm thick).
  • horizontal thin-slab casting installation is synonymous with a horizontal strip casting installation, especially a BCT installation (belt casting technology) or a DSC installation (direct strip casting).
  • vertical thin-slab casting installation covers especially the following types of installations: a thin-slab casting installation in accordance with compact strip production (CSP), a vertical casting installation with a downstream bending and straightening installation for a strand with a still-liquid crater, a vertical casting installation with a downstream bending and straightening installation for a completely solidified strand (e.g., a CSP installation), or a bow-type casting installation.
  • CSP compact strip production
  • the document EP 1 708 830 B1 discloses a CSP installation designed for the production of thin slabs with a thickness of about 50 mm.
  • this document describes a two-strand installation.
  • the strands produced in this installation are fed to a common rolling train.
  • the strands are conveyed by so-called pivoting conveyors.
  • there is a parallel rolling installation for conventional thick slabs or medium-thickness slabs which is arranged downstream of a two-stand blooming train, with which slabs to be charged to the CSP line are reduced to a thickness of about 50 mm.
  • An upstream roughing stand or plate-rolling stand is provided for charging slabs into the CSP line.
  • patent EP 1 318 876 B1 two CSP installations with a downstream rolling train are provided. One of these installations is used to produce carbon steel, while the other is used to produce special steel. The steel slabs are bent in these CSP installations.
  • the technical objective of the present invention is to further develop a previously known installation and a previously known method for casting and rolling metal in such a way that they are also suitable for the production of high alloy steels or super alloy steels and the production of thin strip.
  • the technical objective is achieved by the installation of the invention for casting and rolling metal, which comprises at least a first and a second casting line for casting slabs and means for conveying slabs cast in the first casting line into the second casting line, as well as a rolling train for rolling the cast slabs, wherein the first casting line is designed as a horizontal thin-slab casting installation, which comprises at least one charging vessel for a melt and one horizontally running conveyor belt downstream of the one or more charging vessels in the casting direction, and wherein the second casting line is likewise designed as a horizontal thin-slab casting installation or as a vertical thin-slab casting installation, which comprises at least one mold for the vertical casting of slabs and a bending and straightening device for bending the vertically cast slab into a horizontal position, and wherein a rolling train for rolling the cast slabs is arranged downstream of one of the two casting lines, and the two or more casting lines and the means of conveyance are designed in such a way that the slabs cast with each one of the two or more casting lines can be fed to the rolling train
  • the installation in accordance with the invention allows better utilization of a rolling train.
  • an existing rolling train can be better utilized by expansion with additional casting lines.
  • the provision of a horizontal thin-slab casting installation makes it possible to produce high alloy or super alloy steels, including, for example, crack-sensitive steels and especially steels with a high aluminum content, since the thin slabs do not come into contact with casting flux in the horizontal thin-slab casting installation as a result of the traveling mold or conveyor belt.
  • a fine grain structure is also realized due to rapid solidification and a low segregation tendency.
  • oscillation marks on the cast product can be avoided by a traveling mold. Possible cracking, bending or straightening damage is also avoided.
  • standard steels can also be produced by the additionally provided thin-slab casting installation. All together, the production program or spectrum is thus considerably expanded compared to known installations.
  • the use of thin-slab technology also makes it possible directly to produce strips with a thickness of less than 15 mm, which greatly reduces the rolling work in the rolling train.
  • each of the two or more casting lines is designed as a horizontal thin-slab casting installation, which is followed by the rolling train for rolling the slabs cast in the horizontal thin-slab casting installations.
  • the two or more casting lines are designed in a way that makes it possible to cast slabs of such small thickness that a roughing stand is not necessary for rolling the cast slabs before they enter the rolling train. This type of arrangement saves space, energy, and expense.
  • the thin-slab casting installation is designed for casting and rolling slabs with a thickness of 40 mm to 1.20 mm, and/or the horizontal thin-slab casting installation is designed for casting and rolling slabs with a thickness of 5 mm to 35 mm and preferably 10 mm to 20 mm.
  • the one or more horizontal thin-slab casting installations are designed for casting high alloy and super alloy steels.
  • At least one temperature-adjusting device is arranged downstream of the conveyor belt of the one or more thin-slab casting installations in the direction of casting, and/or at least one temperature-adjusting device, especially a furnace, is arranged downstream of the bending device of the one or more thin-slab casting installations in the direction of casting.
  • the means for conveying slabs cast in one of the two or more casting lines to another of the two or more casting lines consist of conveyors, especially pivoting conveyors, and/or the conveyors are designed in such a way that the slabs are conveyed into a section of the temperature-adjusting device of the other of the two or more casting lines.
  • the two or more casting lines are arranged parallel to each other and/or side by side.
  • the installation comprises a total of three casting lines arranged parallel side by side, and the rolling train for rolling the slabs cast in the casting lines is arranged downstream of the middle of the three casting lines in the direction of casting.
  • the invention comprises a method for casting and rolling metal with at least two casting lines, which hereafter are also referred to as the first and second casting lines, for casting slabs, especially with the installation according to one or more of the embodiments described above, wherein thin slabs are cast horizontally in at least one of the casting lines, and thin slabs are likewise horizontally cast in at least one other casting line, and/or slabs are cast vertically and/or in a curve and are bent into a horizontal direction during or after the casting, wherein the cast slabs are then fed to exactly one rolling train.
  • the advantages of the method of the invention are largely the same as those of the installation of the invention.
  • the horizontally cast thin slabs consist of steels with an aluminum content of up to 10%.
  • the horizontally cast thin slabs consist of steels with an aluminum content of 1-3%.
  • the horizontally cast thin slabs consist of carbon steels, low alloy steels, high alloy steels or peritectic steels.
  • FIG. 1 a is a schematic top view of an embodiment of an installation of the invention, in which a horizontal thin-slab casting installation can be connected by pivoting conveyors with a two-strand thin-slab casting installation.
  • FIG. 1 b is a perspective view of the installation according to FIG. 1 a but with a common distributing launder for the two-strand vertical thin-slab casting installation.
  • FIG. 1 c is a schematic top view of an embodiment of an installation of the invention analogous to FIG. 1 a but with a shorter temperature-adjusting section.
  • FIG. 1 d is a perspective view of the installation according to FIG. 1 c.
  • FIG. 2 a is a schematic top view of an embodiment of the invention with a thin-slab casting installation together with a downstream roiling train and two horizontal thin-slab casting installations that can be connected with this installation by means of pivoting conveyors.
  • FIG. 2 b is a perspective view of the installation according to FIG. 2 a.
  • FIG. 3 a is a schematic top view of an embodiment of the invention with a horizontal thin-slab casting installation together with a downstream rolling train and two additional horizontal thin-slab casting installations that can be connected with this installation by means of pivoting conveyors.
  • FIG. 3 b is a perspective view of the installation according to FIG. 3 a.
  • FIG. 4 a is a schematic top view of an embodiment of the invention with three horizontal thin-slab casting installations, which are fed by a common distributing launder and can be connected with one another by pivoting conveyors, and which have a common downstream rolling train.
  • FIG. 4 b is a perspective view of the installation according to FIG. 4 b.
  • FIG. 1 a shows a specific embodiment of an installation of the invention with two CSP installations 2 or vertical thin-slab casting installations 2 .
  • These vertical thin-slab casting installations 2 in themselves are already well known.
  • a strand is first vertically cast with a mold 4 and then bent by a bending device 7 and subsequently straightened with a straightening unit.
  • a cutting unit 8 or shears 8 are provided farther along in the direction of casting.
  • the slabs then arrive in a downstream temperature-adjusting unit 9 , especially a furnace 9 , where, for example, they can be heated or held at a certain temperature.
  • a horizontal thin-slab casting installation 1 is arranged alongside the two CSP casting installations 2 .
  • This installation is preferably located parallel next to one of the vertical thin-slab casting installations 2 .
  • the installation 1 which is shown at the top in FIG. 1 a , has a charging vessel 5 for the melt and a conveyor belt 6 , onto which the liquid metal is guided and on which the metal strip begins to solidify. This is followed downstream in FIG. 1 a by a temperature-adjusting zone or unit 9 .
  • the embodiment illustrated in FIG. 1 is also provided with pivoting conveyors 10 for conveying the slabs from the end of the two outer casting lines to the casting line arranged in the middle.
  • pivoting conveyors 10 for conveying the slabs from the end of the two outer casting lines to the casting line arranged in the middle.
  • Experts in this field are already familiar with the design of pivoting conveyors 10 .
  • parallel conveyors which in themselves are already well known, can be provided in accordance with the invention.
  • the temperature-adjusting zones 9 can be designed as roller hearth furnaces; in particular, the conveyors 10 are designed as (tunnel) furnace conveyors. Suitable use of the conveyors 10 allows slabs to be conveyed from each of the three installations 1 , 2 to a downstream rolling train 11 .
  • a total of three casting lines or installations 1 , 2 are arranged side by side.
  • the rolling train 11 is preferably located in line with the middle of the three casting lines.
  • the slabs produced by the outer lines can then be conveyed by the conveyors 10 into a section of the temperature-adjusting unit 9 that is in line with the rolling train 11 .
  • an additional roughing stand can also be provided in one of the casting lines for rolling slabs thus charged.
  • the design of the rolling train 11 arranged downstream of the casting installations 1 , 2 which preferably comprises several roll stands 12 , is not the focus of the invention and can thus be of any known type.
  • FIG. 1 b shows the installation according to FIG. 1 a , wherein the molds 4 of the vertical thin-slab casting and rolling installation are supplied with melt by a common distributing launder.
  • FIGS. 1 a and 1 b make it possible to combine the advantages of horizontal thin-slab casting installations 1 with those of vertical thin-slab casting installations 2 .
  • the rolling train 11 is fully utilized, since three casting lines supply one rolling train 11 . If a thin-slab casting installation 1 were provided by itself, the investment for the rolling train 11 , measured by the amount produced by the thin-slab casting plant 1 , would be relatively high. If a vertical thin-slab casting installation 2 is already present in a plant, it can be expanded by a horizontal thin-slab casting installation in accordance with the invention, so that the economy of the rolling train 11 that is already present is increased, and the production spectrum is expanded.
  • FIGS. 1 c and 1 d show an embodiment of an installation according to the invention that is similar to the embodiment of FIGS. 1 a and 1 b , but in contrast to the installation shown in FIGS. 1 a and 1 b , the horizontal thin-slab casting installation 1 (shown at the top in FIGS. 1 b and 1 c ) is realized with a shorter temperature-adjusting unit 9 . Installations of this type can also be operated more efficiently now, although they have only a relatively short temperature-adjusting zone 9 for the temporary storage of the thin or very thin slabs. The rest of the system is equivalent to the system shown in FIGS. 1 a and 1 b.
  • FIG. 2 a shows a vertical thin-slab casting installation 2 with a downstream rolling train 11 arranged in line with it.
  • Horizontal thin-slab installations 1 of the type already shown in FIGS. 1 b and 1 c are arranged next to this installation.
  • slabs can be conveyed or guided by means of conveyors 10 from the two outer thin-slab casting installations 1 or casting lines, preferably from the end of the given temperature-adjusting unit 9 , into a section of the temperature-adjusting zone 9 of the middle casting line or thin-slab casting installation 2 .
  • this section is preferably positioned in a middle region of the temperature-adjusting unit 9 of the vertical thin-slab casting installation 2 . If slabs arrive in this section from the outer casting lines, they preferably still pass through part of the temperature-adjusting zone 9 and are then fed to the rolling train 11 .
  • FIG. 2 b shows the same system as FIG. 2 a but in a perspective view.
  • the reference numbers refer to the same structures as in FIGS. 1 a to 1 d.
  • FIGS. 3 a and 3 b show a top view and a perspective view of another embodiment of an installation according to the invention.
  • three horizontal thin-slab casting installations 1 are arranged side by side, and a downstream rolling train 11 is aligned with or is arranged in line with the thin-slab casting installation 1 that is arranged in the middle of the three installations.
  • a conveyor system 10 is provided for conveying slabs from the outer installations to the installation or casting line that is arranged in the middle.
  • FIGS. 4 a and 4 b are analogous to FIGS. 3 a and 3 b , but all of the casting lines are supplied with melt by a common distributing launder 3 . In this case, we can also talk of an installation with three or more strands feeding one rolling train 11 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
US13/257,088 2009-11-21 2010-11-18 System and method for casting and rolling metal Abandoned US20120006502A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009054213 2009-11-21
DE102009054213.2 2009-11-21
PCT/EP2010/067771 WO2011061262A1 (de) 2009-11-21 2010-11-18 Anlage und verfahren zum giessen und walzen von metall

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US (1) US20120006502A1 (es)
EP (1) EP2501506A1 (es)
JP (1) JP2012518541A (es)
KR (1) KR20110103465A (es)
CN (1) CN102341198A (es)
AR (1) AR080066A1 (es)
AU (1) AU2010320921A1 (es)
CA (1) CA2753152A1 (es)
DE (1) DE102010050647A1 (es)
MX (1) MX2011011319A (es)
RU (1) RU2461442C1 (es)
TW (1) TW201127509A (es)
UA (1) UA102591C2 (es)
WO (1) WO2011061262A1 (es)

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ITUD20130128A1 (it) * 2013-10-04 2015-04-05 Danieli Off Mecc Impianto siderurgico a linea di co-laminazione multipla e relativo metodo di produzione
IT202100006407A1 (it) 2021-03-17 2022-09-17 Danieli Off Mecc Procedimento ed impianto per la produzione di prodotti laminati piani

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ITMI20120760A1 (it) * 2012-05-07 2013-11-08 Arvedi Steel Engineering S P A Impianto e procedimento per la produzione di un nastro d'acciaio laminato a caldo in un'ampia gamma dimensionale
DE102013214940A1 (de) 2013-07-30 2015-02-05 Sms Siemag Ag Gießwalzanlage und Verfahren zum Herstellen von Brammen
EP3318342A1 (de) * 2016-11-07 2018-05-09 Primetals Technologies Austria GmbH Verfahren zum betreiben einer giesswalzverbundanlage
CN107598104B (zh) * 2017-11-03 2022-12-02 中冶赛迪上海工程技术有限公司 一种结晶器与扇形段的对中工具及对中方法
DE102019207459A1 (de) * 2018-05-23 2019-11-28 Sms Group Gmbh Gieß-Walzanlage für den Batch- und Endlosbetrieb

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* 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
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
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
IT202100006407A1 (it) 2021-03-17 2022-09-17 Danieli Off Mecc Procedimento ed impianto per la produzione di prodotti laminati piani

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JP2012518541A (ja) 2012-08-16
KR20110103465A (ko) 2011-09-20
DE102010050647A1 (de) 2011-05-26
MX2011011319A (es) 2011-11-18
UA102591C2 (ru) 2013-07-25
AR080066A1 (es) 2012-03-14
TW201127509A (en) 2011-08-16
AU2010320921A1 (en) 2011-10-27
RU2461442C1 (ru) 2012-09-20

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