US20120037331A1 - Method and Device for Guiding and Orienting a Strand in a Continuous Casting Facility for Large-Sized Round Profiles - Google Patents

Method and Device for Guiding and Orienting a Strand in a Continuous Casting Facility for Large-Sized Round Profiles Download PDF

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Publication number
US20120037331A1
US20120037331A1 US13/266,210 US201013266210A US2012037331A1 US 20120037331 A1 US20120037331 A1 US 20120037331A1 US 201013266210 A US201013266210 A US 201013266210A US 2012037331 A1 US2012037331 A1 US 2012037331A1
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US
United States
Prior art keywords
strand
orienting
strand surface
heated
track
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
US13/266,210
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English (en)
Inventor
Thomas Meier
Klaus Von Eynatten
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.)
SMS Concast AG
Original Assignee
SMS Concast 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 SMS Concast AG filed Critical SMS Concast AG
Assigned to SMS CONCAST AG reassignment SMS CONCAST AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MEIER, THOMAS, VON EYNATTEN, KLAUS
Publication of US20120037331A1 publication Critical patent/US20120037331A1/en
Abandoned legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/009Continuous casting of metals, i.e. casting in indefinite lengths of work of special cross-section, e.g. I-beams, U-profiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0406Moulds with special profile
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12Accessories for subsequent treating or working cast stock in situ
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12Accessories for subsequent treating or working cast stock in situ
    • B22D11/1226Accessories for subsequent treating or working cast stock in situ for straightening strands
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12Accessories for subsequent treating or working cast stock in situ
    • B22D11/128Accessories for subsequent treating or working cast stock in situ for removing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12Accessories for subsequent treating or working cast stock in situ
    • B22D11/128Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282Vertical casting and curving the cast stock to the horizontal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16Controlling or regulating processes or operations

Definitions

  • the invention relates to a method and a device for guiding and orienting a strand in a continuous casting facility for large-sized round profiles made of steel or a similar material.
  • Round profiles are products with an approximately round or oval cross-section which have a continuously curved outer surface and so, unlike profiles with a polygonal cross-section, are free from edges.
  • the casting strand cools down more quickly at the edges than on the wide sides during the solidification process, and this is associated with the risk of cracks forming in the edge regions.
  • This risk is largely independent of the format size of the profile, and it arises in particular at the cross-over from the radius to the extension of the strand.
  • In order to avoid the formation of cracks it is necessary to heat the edge regions of the profile by specifically introducing heat energy along the whole guide track. This type of method is disclosed in WO 2007/131584 A1.
  • the strand passing out of the die is bent via one or more orienting points from the perpendicular direction at the die exit into the horizontal direction.
  • the smallest possible curvature radius is sought.
  • this leads to high compressive stresses on the lower side and to corresponding tensile stresses on the upper side of the casting strand.
  • the tensile stresses cause cracks to form on the upper side of the strand surface although these regions themselves are subjected to the same even cooling as the rest of the strand surface.
  • the casting speeds are very low. In this way the risk of crack formation is increased because the surface temperature of the strand is lower due to the slow casting.
  • the object forming the basis of the invention is to avoid these disadvantages and to provide a method and a device of the type specified at the start which also guarantees crack-free bending of the casting strand along the orienting track, even with large-sized round profiles.
  • This object is achieved according to the invention in that the strand surface within the orienting track is heated at least on the upper side.
  • the invention makes provision to heat the whole of the strand surface.
  • the heating power can be adapted to the stresses occurring locally in the strand surface along the orienting track. In this way it is possible to optimise the mode of operation of the facility procedurally.
  • the strand surface is heated in a number of preferably evenly arranged partial zones of the orienting track.
  • the heating power can be adapted to the different requirements in the individual orienting track sections.
  • the stresses occurring while orienting the strand are by nature particularly large in the region of the extension of the strand guide. For this reason the invention makes provision to heat the strand surface preferably in the whole orienting track section.
  • the invention also makes provision such that the strand surface is heated by burning an air/gas mixture in a porous structure and blowing the hot exhaust gasses produced onto the strand surface. This results in flame-free, volumetric burning with easily controllable and stable burning of the energy carrier, a high degree of conversion of the energy into radiation energy, and a large control range of the heat energy introduced and exhaust gasses flowing out over a large area.
  • the device according to the invention for implementing the method has at least one porous burner with a reactor filled with ceramic foam or similar structures, the hot exhaust gasses of which flow around the whole of the strand surface. Since, as known from experience, the risk of cracks on the upper side of the strand surface is greater, it is advantageous to orient the outlet opening of the reactor specifically so that the hot exhaust gasses can initially heat the region of the strand at greatest risk of cracking.
  • the invention makes provision to equip the device with a number of preferably evenly distributed porous burners which are placed in the spaces between the pairs of straightening rolls of the orienting driver device.
  • This type of device is on the one hand space-saving, and on the other hand enables finally tuned heating of the casting strand.
  • the device additionally with at least one porous burner disposed in front of the orienting driver device.
  • the risk of crack formation is thus prevented over a longer section of the strand guide.
  • FIG. 1 shows the guide and orientation device according to the invention, shown diagrammatically in the side view, and
  • FIG. 2 shows a porous burner for the device from FIG. 1 , also shown diagrammatically as a section and enlarged.
  • the guide and orientation device 1 shown in FIG. 1 is part of a continuous casting facility for producing large-sized round profiles made of steel or a similar material.
  • the molten steel is introduced into a die 2 to the die outlet 3 of which a strand guide 4 is connected.
  • the casting strand 5 passing out of the die 2 is guided in the upper section of the guide track through elongate tunnel elements 6 a to 6 d in which the casting strand 5 is, as the case may be, insulated or heated.
  • These tunnel elements 6 a to 6 d can be closed all around or advantageously designed to be open at the bottom.
  • the first three tunnel elements 6 a to 6 c can be formed, for example, such that cooling of the strand running through the latter is implemented, with a subsequent tunnel element 6 d, however, insulation being brought about without cooling or even heating of the strand.
  • the tunnel elements 8 b, 8 d and 8 f are equipped with porous burners 10 .
  • One of these burners is illustrated diagrammatically in FIG. 2 .
  • the tunnel elements 8 b, 8 d and 8 f have an upper top wall 11 on which the respective porous burner 10 is placed.
  • a wall, not detailed, which is advantageously provided with openings or the like, is also respectively provided on the lower side of these tunnel elements 8 b, 8 d and 8 f so that these tunnel elements insulate better.
  • This porous burner 10 substantially consists of a burnable gas and air supply connection 12 and a reactor cell 13 connected to the latter and which is filled with a filler 14 made of porous ceramic foam.
  • a burnable gas and air supply connection 12 substantially consists of a burnable gas and air supply connection 12 and a reactor cell 13 connected to the latter and which is filled with a filler 14 made of porous ceramic foam.
  • the exhaust gas flowing out of the reactor cell 13 flows around the whole of the casting strand 5 and advantageously heats the strand surface 15 in the upper region more than on the lower side without heating the core of the strand 16 at the same time to an appreciable degree.
  • the porous burners 10 enable very easily controllable and stable combustion of the energy carrier, a very high degree of conversion of the energy into radiation energy, an exhaust gas flowing out evenly and over a large area, as well as a very high adjustment range of the heat energy introduced so that the heating power of the individual burners can easily be adapted to the local requirements.
  • An additional porous burner 17 is disposed in the elongate tunnel element 6 d of the strand guide in front of the orienting driver device 7 . It is formed in exactly the same way as the porous burners 10 of the orienting driver device 7 , and like the latter also has the function of heating the strand surface 15 in order to avoid the risk of crack formation here too. Since this risk increases as the solidification process progresses, it is in any case advantageous to arrange the porous burners 10 and 17 in the outlet side region of the strand guide in which the strand surface has already hardened to a considerable degree. Within this context other burner arrangements are needless to say conceivable inside and outside of the orienting driver device, respectively adapted to the respective conditions.
  • the burners are differently from the embodiment described in so far as they are suitable for heating the whole of the upper and lower side of the strand surface evenly.
  • the described embodiment has the advantage that the hot exhaust gases flowing out of the reactor 13 heat the upper side of the strand which is most greatly at risk of cracks, whereas the lower side which is less at risk of cracks is only heated subsequently by exhaust gases which are not quite as hot.
  • temperature sensors 18 are provided along the strand guide.
  • the facility described is equipped with a strand guide continuously bent from the die outlet 3 to the outlet from the orienting driver device 7 .
  • the invention can also needless to say be applied to facilities the strand guide of which, after the die outlet, initially runs perpendicularly so as only then to pass into a bent guide track.
  • heating of the strand surface could also only take place on its upper side in order to reduce these tensile stresses occurring when stretching the strand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Articles (AREA)
  • Tunnel Furnaces (AREA)
  • Continuous Casting (AREA)
  • Gas Burners (AREA)
  • Metal Rolling (AREA)
US13/266,210 2009-06-03 2010-05-30 Method and Device for Guiding and Orienting a Strand in a Continuous Casting Facility for Large-Sized Round Profiles Abandoned US20120037331A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20090405092 EP2263816A1 (de) 2009-06-03 2009-06-03 Verfahren und Einrichtung zum Führen und Richten des Strangs in einer Stranggiessanlage für grossformatige Rundprofile
EP09405092.9 2009-06-03
PCT/EP2010/003273 WO2010139438A1 (de) 2009-06-03 2010-05-30 Verfahren und einrichtung zum führen und richten des strangs in einer stranggiessanlage für grossformatige rundprofile

Publications (1)

Publication Number Publication Date
US20120037331A1 true US20120037331A1 (en) 2012-02-16

Family

ID=41006180

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/266,210 Abandoned US20120037331A1 (en) 2009-06-03 2010-05-30 Method and Device for Guiding and Orienting a Strand in a Continuous Casting Facility for Large-Sized Round Profiles

Country Status (9)

Country Link
US (1) US20120037331A1 (ko)
EP (1) EP2263816A1 (ko)
JP (1) JP5608224B2 (ko)
KR (1) KR20120016191A (ko)
CN (1) CN102481624A (ko)
CA (1) CA2760254A1 (ko)
MX (1) MX2011012527A (ko)
RU (1) RU2011153214A (ko)
WO (1) WO2010139438A1 (ko)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106475539A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种减轻铸坯角裂的装置和减裂方法
CN106475540A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种火焰加热减轻铸坯角裂的装置和减裂方法
US10286446B2 (en) 2012-08-15 2019-05-14 Sms Concast Ag Spray nozzle device, in particular for spraying a cast strand
CN112059129A (zh) * 2020-07-15 2020-12-11 金龙精密铜管集团股份有限公司 一种低合金含量铜管材的生产方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478808A (en) * 1964-10-08 1969-11-18 Bunker Ramo Method of continuously casting steel
FR2513552A1 (fr) * 1981-09-30 1983-04-01 Usinor Procede de decintrage de produits de coulee continue courbe et installation pour sa mise en oeuvre
US4444558A (en) * 1982-09-29 1984-04-24 Daidotokushuko Kabushikikaisha System for heating broadwise-end portions of metal material
US5065811A (en) * 1988-11-26 1991-11-19 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for the manufacture of hot rolled steel strip
US5904204A (en) * 1995-04-14 1999-05-18 Nippon Steel Corporation Apparatus for producing strip of stainless steel
US6491771B1 (en) * 1998-12-22 2002-12-10 Sms Demag Ag Method of producing round billets
US7121323B2 (en) * 2002-02-22 2006-10-17 Sms Demag Ag Method and device for the continuous casting and direct shaping of a metal strand, in particular a steel cast strand

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CH444387A (de) * 1966-09-21 1967-09-30 Concast Ag Verfahren zum kontinuierlichen Herstellen von Strängen aus Stahl
JPS552146B2 (ko) * 1972-09-12 1980-01-18
JPS5250933A (en) * 1975-10-22 1977-04-23 Nippon Steel Corp Method and apparatus for production of cast piece with better surface property by curved type continuous casting machine
CH604975A5 (ko) * 1976-04-27 1978-09-15 Concast Ag
JPS609514A (ja) * 1983-06-27 1985-01-18 Chugai Ro Kogyo Kaisha Ltd 熱鋼片端部加熱装置
JPS62502389A (ja) * 1985-04-03 1987-09-17 カ−ジンスキイ、カス・ア−ル 鋼連続鋳造装置及び方法
IT1191432B (it) * 1986-01-07 1988-03-23 Continua Int Macchina estrattrice raddrizzatrice per impianti di colata continua
JPS632546A (ja) * 1986-06-23 1988-01-07 Nippon Steel Corp 連続鋳造における高温出片方法
JPS63207461A (ja) * 1987-02-23 1988-08-26 Nippon Steel Corp 鋳片温度制御装置
JPH0441048A (ja) * 1990-06-07 1992-02-12 Sumitomo Metal Ind Ltd 丸鋳片の連続鋳造装置
JP2983152B2 (ja) * 1995-02-06 1999-11-29 住友重機械工業株式会社 連続鋳造方法および連続鋳造設備
JPH10211564A (ja) * 1997-01-28 1998-08-11 Daido Steel Co Ltd 高速度工具鋼ビレットの連続鋳造方法及びその装置
DE10236368A1 (de) * 2002-02-22 2003-09-04 Sms Demag Ag Verfahren und Vorrichtung zum Stranggiessen und unmittelbaren Verformen eines Metall-, insbesondere eines Giessstrangs aus Stahlwerkstoffen
JP4222148B2 (ja) * 2003-08-07 2009-02-12 住友金属工業株式会社 鋼の連続鋳造方法
DE102006052138A1 (de) 2006-05-16 2007-11-22 Sms Demag Ag Verfahren und Strangführungseinrichtung zum Führen eines gegossenen Strangs

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478808A (en) * 1964-10-08 1969-11-18 Bunker Ramo Method of continuously casting steel
FR2513552A1 (fr) * 1981-09-30 1983-04-01 Usinor Procede de decintrage de produits de coulee continue courbe et installation pour sa mise en oeuvre
US4444558A (en) * 1982-09-29 1984-04-24 Daidotokushuko Kabushikikaisha System for heating broadwise-end portions of metal material
US5065811A (en) * 1988-11-26 1991-11-19 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for the manufacture of hot rolled steel strip
US5904204A (en) * 1995-04-14 1999-05-18 Nippon Steel Corporation Apparatus for producing strip of stainless steel
US6491771B1 (en) * 1998-12-22 2002-12-10 Sms Demag Ag Method of producing round billets
US7121323B2 (en) * 2002-02-22 2006-10-17 Sms Demag Ag Method and device for the continuous casting and direct shaping of a metal strand, in particular a steel cast strand

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EPO machine translation of FR 2513552 A, 4/1/83 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10286446B2 (en) 2012-08-15 2019-05-14 Sms Concast Ag Spray nozzle device, in particular for spraying a cast strand
CN106475539A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种减轻铸坯角裂的装置和减裂方法
CN106475540A (zh) * 2015-08-31 2017-03-08 鞍钢股份有限公司 一种火焰加热减轻铸坯角裂的装置和减裂方法
CN112059129A (zh) * 2020-07-15 2020-12-11 金龙精密铜管集团股份有限公司 一种低合金含量铜管材的生产方法

Also Published As

Publication number Publication date
MX2011012527A (es) 2011-12-16
KR20120016191A (ko) 2012-02-23
CN102481624A (zh) 2012-05-30
JP5608224B2 (ja) 2014-10-15
RU2011153214A (ru) 2013-07-20
JP2012528720A (ja) 2012-11-15
WO2010139438A1 (de) 2010-12-09
CA2760254A1 (en) 2010-12-09
EP2263816A1 (de) 2010-12-22

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AS Assignment

Owner name: SMS CONCAST AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MEIER, THOMAS;VON EYNATTEN, KLAUS;REEL/FRAME:027117/0121

Effective date: 20111014

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE