EP2445663A2 - Procédé et dispositif de fabrication de bandes d'acier par coulée en bande - Google Patents

Procédé et dispositif de fabrication de bandes d'acier par coulée en bande

Info

Publication number
EP2445663A2
EP2445663A2 EP10726416A EP10726416A EP2445663A2 EP 2445663 A2 EP2445663 A2 EP 2445663A2 EP 10726416 A EP10726416 A EP 10726416A EP 10726416 A EP10726416 A EP 10726416A EP 2445663 A2 EP2445663 A2 EP 2445663A2
Authority
EP
European Patent Office
Prior art keywords
casting
nozzle
plasma
molten metal
plasma torch
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.)
Granted
Application number
EP10726416A
Other languages
German (de)
English (en)
Other versions
EP2445663B1 (fr
Inventor
Hellfried Eichholz
Jochen Wans
Karl-Heinz Spitzer
Hans-Jürgen HECKEN
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 Group GmbH
Original Assignee
SMS Siemag 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 Siemag AG filed Critical SMS Siemag AG
Publication of EP2445663A2 publication Critical patent/EP2445663A2/fr
Application granted granted Critical
Publication of EP2445663B1 publication Critical patent/EP2445663B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B22D11/06—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
    • B22D11/06—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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0697—Accessories therefor for casting in a protected atmosphere
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C21D8/0215—Rapid solidification; Thin strip casting

Definitions

  • the invention relates to a method for producing steel strips by means of strip casting according to the preamble of claim 1 and to a device according to claim 10.
  • a method of the generic type for producing steel strips by means of strip casting is known (Steel Research 74 (2003), No. 11/12, page 724-731).
  • this known as DSC process manufacturing method is suitable for the production of hot strip of lightweight steel.
  • melt is fed from a feed vessel via a runner and a siphon-like discharge nozzle formed as a casting nozzle on a revolving casting belt of a horizontal strip casting.
  • the discontinued melt solidifies to a pre-strip with a thickness in the range between 6 to 20 mm. After solidification, the pre-strip is subjected to a hot rolling process.
  • a disadvantage of this strip casting plant is that it can lead to caking during operation on the outlet side region of the casting nozzle, which increasingly reduce the outlet cross section for the melt. As a result, there is an uneven supply of the liquid steel to the belt and consequently to casting defects. Investigations into the cause of the caking have shown that on the one hand, the lower compared to the melt temperature at the casting nozzle allows the formation of deposits, on the other hand, the existing ceramic casting nozzle is wetted during melting of emerging on the melt surface oxides, which adhere there and then form an ideal surface for further growth of the caking.
  • the caking forms especially in the critical triple point of Keramikg mandüse, circulating cooled casting belt and liquid molten metal and flow-unfavorable areas.
  • the object of the invention is to provide a method for producing steel strips by means of strip casting, in which the previously described problems are avoided, but at least significantly reduced. Another object is to provide a device for carrying out the method.
  • At least one plasma jet which inactivates and heats the exposure region acts on the outlet-side region of the casting nozzle and on the melt emerging therefrom, at least during the casting process.
  • the inventive method is basically suitable for the production of hot strips of various metallic materials, especially for lightweight steels, such as high modulus HSD ® steels.
  • the operating times and thus the profitability of the strip casting plant and the quality of the cast strip can be significantly increased.
  • the plasma is ignited in a conventional manner by high voltage or high frequency inductively or capacitively in the burner itself or against the molten metal and maintained with DC or AC.
  • the strength (intensity) of the plasma is advantageously set via a set of rules consisting of a gas mixing, pressure and flow regulator and a control device for the electrical parameters.
  • an inert gas such as argon or nitrogen used.
  • plasma gas but in addition to argon and nitrogen, other individual gases or gas mixtures with additions of H 2 , CO, CO 2 or CH 4 and other combinations can be used.
  • the surface (surface tension) of the metal film can be influenced very well.
  • existing hydrogen very well prevents the oxidation of the melt surface.
  • the flow behavior of the metal film and thus the wettability of the ceramic with regard to the prevention of caking can advantageously be influenced.
  • a nozzle-like element designed as an argon screen is arranged in front of the casting nozzle, which nozzle blocks the liquid steel on the casting nozzle
  • the argon rake is modified in such a way that one or more plasma torches can be integrated one after the other into the system, viewed one below the other or in the direction of melt flow, so that a structural unit is formed.
  • the plasma torches are positioned so that they can act on the edge area in particular over the entire width of the pouring nozzles.
  • the use of multiple burners is advantageous because it can increase the efficiency of inerting and heating.
  • the plasma torches act sectorally on the outlet-side casting nozzle area, wherein optimal targeted heating of the casting nozzle over its width or over the width of the exiting melt bath can be carried out via a specific separate temperature control of the individual burners.
  • the assembly is inventively made of a good heat conducting material, such. As copper, prepared and is cooled intensively with water.
  • the jet direction of the plasma torch is advantageously adjusted slightly inclined downwards in the direction of the liquid steel against the casting direction, in order to be able to influence the melt pool surface in a targeted manner.
  • the plasma torches are also slightly aligned in the direction of the edge region of the exiting melt.
  • FIG. 1 in a plan view, a schematic representation of the casting nozzle region of a strip casting plant according to the invention
  • Figure 2 as Figure 1 in a side view.
  • FIG. 1 shows a plan view of a schematic representation of the casting nozzle region of a strip casting plant according to the invention.
  • Metal melt 7 runs in this illustration from left to right and is indicated by an arrow.
  • an assembly 4 according to the invention made of an argon rake for the uniform distribution of melt on the surface of the casting belt 3 and plasma torches 9 (FIG. 2) is shown made of copper.
  • the plasma torches 9 are arranged so that their plasma jets 5 completely inertize the exit region of the molten metal 7 from the casting nozzle and the melt surface and can control the temperature of the melt.
  • the nozzles 6 of the argon rake are directed obliquely downward onto the molten metal 7.
  • FIG. 2 shows the pouring nozzle region in a side view according to section A - A from FIG. From this view, which also consists of ceramic upper part 8 and the lower part 8 'of the pouring nozzle can be seen.
  • the assembly 4 with argon rake and plasma torches 9 is arranged in the outlet region of the molten metal 7 from the casting nozzle so that on the one hand the nozzles 6 ( Figure 1) of the argon rake distribute the exiting molten metal uniformly on the casting belt 3 and on the other hand the plasma jets 5 of the plasma torch 9 the exit region can completely inertize.
  • the plasma torches 9 are inclined according to the invention in the direction of the exiting melt.
  • the plasma torch 9 are cooled by cooling water bores 10 by means of water and supplied via a plasma gas supply 11 with plasma gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Plasma Technology (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

L'invention concerne un procédé et un dispositif de fabrication de bandes d'acier par coulée en bande, procédé selon lequel un métal fondu provenant d'un récipient d'alimentation par le biais d'une goulotte de coulée et d'une zone de sortie, conçue en tant que buse de coulée en forme de siphon, est acheminé sous gaz inerte, sur une bande de coulée en mouvement d'une installation horizontale de coulée en bande. Selon l'invention, au moins un jet de plasma exerce une action chauffante et inertante sur la zone côté sortie de la buse de coulée et sur le métal fondu qui en sort au moins pendant le processus de coulée. A cet effet, selon l'invention, au moins une torche à plasma produit un jet de plasma dirigé vers la zone de sortie de la buse de coulée, dans la direction opposée à la direction de coulée.
EP10726416.0A 2009-06-26 2010-05-07 Procédé et dispositif de fabrication de bandes d'acier par coulée en bande Active EP2445663B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009031236A DE102009031236B3 (de) 2009-06-26 2009-06-26 Verfahren und Vorrichtung zum Erzeugen von Stahlbändern mittels Bandgießen
PCT/DE2010/000551 WO2010149125A2 (fr) 2009-06-26 2010-05-07 Procédé et dispositif de fabrication de bandes d'acier par coulée en bande

Publications (2)

Publication Number Publication Date
EP2445663A2 true EP2445663A2 (fr) 2012-05-02
EP2445663B1 EP2445663B1 (fr) 2016-08-10

Family

ID=43028799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10726416.0A Active EP2445663B1 (fr) 2009-06-26 2010-05-07 Procédé et dispositif de fabrication de bandes d'acier par coulée en bande

Country Status (13)

Country Link
US (1) US8695685B2 (fr)
EP (1) EP2445663B1 (fr)
JP (1) JP5490888B2 (fr)
KR (1) KR101391633B1 (fr)
CN (1) CN102497945B (fr)
BR (1) BRPI1016152B1 (fr)
DE (1) DE102009031236B3 (fr)
ES (1) ES2602466T3 (fr)
PL (1) PL2445663T3 (fr)
RU (1) RU2484920C1 (fr)
UA (1) UA112836C2 (fr)
WO (1) WO2010149125A2 (fr)
ZA (1) ZA201109005B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033018A1 (de) * 2010-07-31 2012-02-02 Sms Siemag Aktiengesellschaft Schmelzenaufgabesystem zum Bandgießen
JP2017030033A (ja) * 2015-08-05 2017-02-09 Ｊｆｅスチール株式会社 金属薄帯製造装置
CN113210576B (zh) * 2021-05-17 2022-12-13 上海大学 一种生产金属薄带的方法及其装置

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
SU740398A1 (ru) * 1977-12-22 1980-06-15 Предприятие П/Я Р-6930 Установка дл лить под давлением тугоплавких сплавов
GB2151761B (en) * 1983-12-13 1986-10-29 Daido Steel Co Ltd A melting and casting installation
JPS60187448A (ja) * 1984-03-05 1985-09-24 Kobe Steel Ltd 連続鋳造設備
JPS60187448U (ja) 1984-05-22 1985-12-12 伊勢電子工業株式会社 螢光表示管
JPS6277155A (ja) * 1985-09-30 1987-04-09 Nippon Steel Corp 双ロ−ル型連続鋳造方法
JPS6277155U (fr) 1985-11-01 1987-05-18
JPS62161443A (ja) * 1986-01-09 1987-07-17 Nippon Steel Corp 金属細線の鋳造方法
JPS62161443U (fr) 1986-04-01 1987-10-14
DE3707897A1 (de) * 1987-03-12 1988-09-22 Mannesmann Ag Verfahren und giessvorrichtung zum giessen von baendern aus metall, insbesondere aus stahl
CH671351A5 (fr) 1987-04-10 1989-08-31 Battelle Memorial Institute
JPH0658840B2 (ja) * 1988-04-26 1994-08-03 新日本製鐵株式会社 移行形プラズマトーチ
JPH0234254A (ja) * 1988-07-22 1990-02-05 Nisshin Steel Co Ltd 薄板連鋳機
JPH07227647A (ja) * 1994-02-22 1995-08-29 Sky Alum Co Ltd 長尺アルミニウム鋳塊の製造方法
DE4407873C2 (de) * 1994-03-04 1997-04-10 Mannesmann Ag Verfahren und Vorrichtung zum Kühlen schmelzflüssigen Stahls
US5651413A (en) * 1995-10-06 1997-07-29 Armco Inc. In-situ conditioning of a strip casting roll
CN1063690C (zh) * 1997-11-14 2001-03-28 中国科学技术大学 钢包在线等离子体加热实现钢水低过热度恒温连铸的方法
US7891407B2 (en) * 2004-12-13 2011-02-22 Nucor Corporation Method and apparatus for localized control of heat flux in thin cast strip
DE102009018683A1 (de) * 2009-04-23 2010-10-28 Sms Siemag Ag Verfahren und Vorrichtung zum Stranggießen einer Bramme

Non-Patent Citations (1)

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Title
See references of WO2010149125A2 *

Also Published As

Publication number Publication date
WO2010149125A3 (fr) 2011-03-24
JP2012530607A (ja) 2012-12-06
DE102009031236B3 (de) 2010-12-02
BRPI1016152A8 (pt) 2016-05-03
ZA201109005B (en) 2012-07-25
AU2010265242A1 (en) 2012-02-02
US20120125557A1 (en) 2012-05-24
PL2445663T3 (pl) 2017-03-31
ES2602466T3 (es) 2017-02-21
BRPI1016152A2 (pt) 2016-04-19
UA112836C2 (uk) 2016-11-10
US8695685B2 (en) 2014-04-15
EP2445663B1 (fr) 2016-08-10
BRPI1016152B1 (pt) 2018-04-24
WO2010149125A2 (fr) 2010-12-29
CN102497945A (zh) 2012-06-13
RU2484920C1 (ru) 2013-06-20
CN102497945B (zh) 2014-12-10
JP5490888B2 (ja) 2014-05-14
KR20120016312A (ko) 2012-02-23
KR101391633B1 (ko) 2014-05-21

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