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WO2009141207A1 - Procédé et installation de coulée continue pour la fabrication de brames épaisses - Google Patents

Procédé et installation de coulée continue pour la fabrication de brames épaisses Download PDF

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Publication number
WO2009141207A1
WO2009141207A1 PCT/EP2009/054813 EP2009054813W WO2009141207A1 WO 2009141207 A1 WO2009141207 A1 WO 2009141207A1 EP 2009054813 W EP2009054813 W EP 2009054813W WO 2009141207 A1 WO2009141207 A1 WO 2009141207A1
Authority
WO
WIPO (PCT)
Prior art keywords
strand
steel strand
guide
steel
casting
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.)
Ceased
Application number
PCT/EP2009/054813
Other languages
German (de)
English (en)
Inventor
Josef Watzinger
Michael Stiftinger
Paul Pennerstorfer
Josef Guttenbrunner
Karl Moerwald
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
Siemens VAI Metals Technologies GmbH and Co
Siemens VAI Metals Technologies GmbH Austria
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40796189&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009141207(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens VAI Metals Technologies GmbH and Co, Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH and Co
Priority to KR2020107000031U priority Critical patent/KR20110002081U/ko
Priority to DE212009000056U priority patent/DE212009000056U1/de
Priority to CN200990100251XU priority patent/CN202015821U/zh
Publication of WO2009141207A1 publication Critical patent/WO2009141207A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal
    • 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
    • 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

Definitions

  • the invention relates to a method for producing thick steel slabs with a casting thickness exceeding 360 mm and a casting width exceeding 1000 mm in a continuous casting plant. Furthermore, the invention relates to a continuous casting plant for carrying out this method.
  • a continuous casting plant of the type "Vertical Plant or Vertical Turning Plant”, which has a long vertical strand guide part with subsequent bending and straightening zone, is from the publication of Dr.-Ing Klaus Harste et al; "Construction of a new vertical caster at Dillinger Wegtentechnike”; MPT International 4/1998; P. 1 12-122 already known.
  • This casting plant whose layout is shown in Figure 8, allows the casting of steel strands with a casting widths of 1400 to 2200 mm and a casting thickness between 230 and 400 mm. She has a very long time vertical strand guide with intensive strand cooling in this section to allow subsequent bending and straightening of the steel strand with solidified strand.
  • This plant concept leads to a high construction height of the continuous casting plant of about 45 m and thus to high investment costs, especially in the infrastructure and to difficult maintenance conditions.
  • the achievable casting speed is about 0.3 m / min, whereby the productivity per strand is relatively low.
  • the low casting speed also means that the cast steel strand can not be kept hot enough for straightening and must therefore be kept below a critical temperature with intensive cooling to avoid Ductility problems, which typically occur in temperature ranges from 600 to 850 0 C.
  • a Bogenstrangg imagine laminate for casting a steel strand with a strand thickness of 200 to 300 mm is known to be produced with good quality slabs.
  • the shaping of the metal strand takes place here in a curved mold having a radius of curvature which corresponds to the radius of curvature in a first zone of the subsequent strand guide.
  • the steel strand is re-directed, forcibly leading to the formation of a trapezoidal cross-section of the steel strand. This cross-sectional distortion is greater the greater the strand thickness and leads to quality problems in the subsequent rolling in the plate mill.
  • the object of the present invention is therefore to avoid the disadvantages of the known prior art and to propose a method for the production of thick steel slabs and a continuous casting plant for carrying out this process, wherein the production of high-quality steel strands and slabs in a 360 mm crossing Casting thickness with good internal quality and low susceptibility to cracking is guaranteed.
  • Another object of the invention is to keep the investment and operating costs low with high productivity of the casting plant.
  • the object underlying the invention is achieved in a method for producing thick steel slabs with a casting thickness exceeding 360 mm and a casting width exceeding 1000 mm by the combination of the following features:
  • the strand formation in a straight, vertically oriented mold is known for reasons of symmetry good conditions for the introduction of the molten steel in the mold and for a uniform strand shell formation.
  • the straight mold increases the vertical length which is crucial for uniform strand shell formation and improves the conditions for the deposition of non-metallic elements from the melt bath.
  • the bending of the cast steel strand to a predetermined radius of curvature in a bending zone and the bending back of the cast steel strand in a straightening zone corresponds to the concept of known continuous slab casters and has proven itself as such.
  • Essential for the casting of thick slabs is that both processes take place at times at which the steel strand still has a liquid or partially liquid core, or it is necessary to regulate the cooling of the steel strand in the strand guide accordingly.
  • the requirements for the most uniform possible cooling which must necessarily be reflected in a uniform over the strand length and strand width temperature distribution at high temperature level in order to ensure a uniform elasticity of the strand and to avoid cracking due to temperature differences.
  • the vertical length is limited to a degree at which an optimal separation of non-metallic elements (eg casting powder particles) is achieved and at the same time the height of the continuous casting can be kept within conventional casting .
  • the desired and the plant control predetermined temperature profile is determined by an inlet surface temperature of the steel strand in the straightening zone of the strand guide, so that the steel strand including the surface area should be kept in a temperature range that is above the ductility low, whereby the tendency to form surface cracks is also minimized.
  • the proportion of the solid strand shell of the cast steel strand amounts to a maximum of 95% of half the strand thickness during the phase of re-bending in the straightening zone.
  • a thinning of the steel strand using a soft reduction or a dynamic soft reduction seeks to intermix the preferably partially solidified core zone near the solidification point of the strand, thus achieving an improved microstructure in the core region of the slab and avoiding line separations and porosities.
  • a soft reduction in particular a dynamic soft reduction, is applied to the cast steel strand in a still liquid or semi-liquid core region of the steel strand with a strand guide roll adjusting device.
  • the cast steel strand is bent in a bending zone within the strand guide to a radius of curvature between 9.0 m and 15.0 m, held in a subsequent circular arc guide the strand guide on this radius of curvature without further deformation and in a subsequent straightening zone within the strand guide, starting from an arc radius between 9.0 m and 15.0 m straightened again.
  • this radius of curvature while providing the most accurate possible cooling in these areas of the strand guide, provides the best surface quality and minimizes cracking on the cast steel strand.
  • the cooling of the cast steel strand is controlled by applying coolant to the broad sides of the cast steel strand with a cooling device in the strand guide, wherein the impact position of the coolant jets on the steel strand at least in a portion of the strand guide based on a continuous determination of the temperature profile along the transport path of the steel strand and / or in normal planes is regulated.
  • the impact position of the coolant jets on the steel strand can be controlled as a function of a continuous determination of the temperature profile along the transport path of the steel strand or in a normal plane thereto or in dependence of both temperature profiles.
  • the quantity of coolant applied to the steel strand in the strand guide until entry into the straightening zone is regulated in dependence on a predetermined temperature profile along the transport path of the steel strand and / or in a normal plane. This is intended to achieve a further increase in the accuracy of the temperature distribution over the steel strand surface.
  • the given temperature profile takes into account the ductility characteristics of the steel grade to be cast.
  • the quantity of coolant applied to the steel strand can also be regulated as a function of a continuous determination of the temperature profile along the transport path of the steel strand or in a normal plane thereto or as a function of both temperature profiles.
  • a further stabilization of the cooling conditions is achieved if the controlled cooling of the cast steel strand takes place in the partial hot operation or after the dry operation within the strand guide with the inclusion of peripherally cooled strand guide rollers.
  • the strand surface temperature can be kept at a very high level, at least in the region up to the bending back of the steel strand.
  • the cooling of the strand guide rollers takes place here almost exclusively by an internal cooling of the strand guide rollers, wherein the coolant is suitably guided in the roller sheath region as close as possible to the roller sheath surface through coolant channels.
  • the method described is used for producing thick steel strands when the steel strand is cast with a casting thickness of 360 mm to 450 mm.
  • the object stated in the introduction is achieved in a continuous casting plant for the production of thick steel slabs with a casting thickness exceeding 360 mm, preferably at a casting thickness of 360 mm to 450 mm and a casting width exceeding 1000 mm, by the combination of the following features:
  • a straight mold having a vertically oriented mold cavity for producing a steel strand with a liquid core
  • a strand guide for supporting and guiding the cast metal strands it from a vertical casting direction in a horizontal transport direction extending from the mold to a dicing device
  • a dicing device for dividing the steel strand on slabs of predetermined length.
  • Essential in a continuous casting plant of this type is the combination of a straight mold with a downstream strand guide, with a bending zone, a circular arc guide and a straightening zone, which in conjunction with a cooling device for the controlled cooling of the steel strand, ensures the bending and straightening of the cast steel strand with liquid core and high quality requirements for the cast steel strand or the slabs in the claimed thickness range.
  • An improvement in the quality of the steel strand or slabs produced is achieved when a vertical strand support means for vertical guidance of the steel strand are arranged in the strand guide immediately after the mold, which ensure a vertical guidance of the steel strand over a transport distance of less than 4.5 m.
  • An optimization of metallurgical requirements and investment and operating costs of the casting plant results when the minimum radius of curvature in the strand guide is 9.0 to 15.0 m.
  • the overall height of the casting plant remains low and it is the quality standards that are standard for cast steel strands with, for example, 200 - 250 mm casting thickness, almost achieved.
  • the strand guide on a cooling device for controlled cooling of the steel strand which is connected to a central processing unit and controlled by this and in which a mathematical model for continuous determination of the temperature profile along the transport path of the steel strand and / or deposited in normal planes is.
  • the cooling device in the strand guide is equipped with several independently controllable cooling zones over the casting width and / or height-adjustable spray nozzles with controllable adjusting devices. This is a targeted influencing the strand edge temperature by a width-dependent control of the amount of cooling water and / or a change in the distance of the spray nozzles from the steel strand surface and thus a change in the lateral distance of the coolant jet from the steel strand edge possible.
  • One or more electromagnetic devices for influencing the flow motion of the molten steel of the liquid core of the steel strand are disposed in the mold or in the region of the vertical guide of the steel strand.
  • peripherally cooled strand guide rollers are arranged in the strand guide for supporting and guiding the steel strand.
  • Fig. 3 shows a further embodiment of the cooling device with independently controllable cooling zones.
  • FIG. 1 shows a schematic longitudinal section of the structural design of a continuous casting plant for producing slabs of liquid steel for a casting thickness of 400 mm.
  • the continuous casting has a straight mold 1 with vertically aligned mold cavity 1 a. It is designed as an oscillating, internally cooled Verstellkokille with broad side walls and narrow side walls and allows the casting of steel strands with different strand width and possibly also different strand thickness.
  • the mold 1 is equipped with an electromagnetic device 2, such as a stirring coil or an electromagnetic brake, for influencing the flow motion of the molten steel in the liquid core of the cast steel strand.
  • To the mold 1 includes a strand guide 3, which extends to a cutting machine designed as a cutting device 4 for cutting the steel strand in slabs.
  • the cast steel strand is supported and guided on its broad side walls in a tight corset of driven and non-driven strand guide rollers 5 and redirected from a vertical casting direction G to a horizontal transport direction T.
  • Groups of both sides of the steel strand arranged strand guide rollers 5 are summarized in strand guide segments 6.
  • the strand guide 3 comprises a series of successive sections with specific functions, the structure of which is essentially known.
  • a vertical strand support device 7 the steel strand emerging from the mold 1 is guided vertically and supported without the application of bending stresses.
  • a strand support with strand guide rollers 5 also takes place on the narrow sides of the steel strand.
  • a subsequent bending zone 8 there is a progressive bending of the steel strand to a predetermined radius of curvature.
  • a bending back and straightening of the steel strand takes place.
  • the steel strand is conveyed in a horizontal strand guide 11 to the dividing device 4.
  • the cooling device 12 includes, as shown in Figures 2 and 3, between the strand guide rollers 5 positionable spray nozzles 13, which are independently adjustable in a normal plane N to the transport direction T at least in some areas.
  • height-adjustable spray nozzles 13 with associated adjusting devices 14 or, as shown in FIG. 3, spray nozzles 13 with control valves 18 for controlling the movement are shown in FIG Amount of water provided.
  • the adjusting devices 14 or the control valves 18 are actuated by a computing unit 15.
  • the strand guide rollers in these segments can be wedge-shaped to the steel strand and thus allow a small reduction in the thickness of the metal strand and an improvement of the metallurgical properties in the core zone of the steel strand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

L'invention concerne un procédé et un dispositif de fabrication de brames épaisses en acier, d'une épaisseur coulée qui dépasse 360 mm et d'une longueur coulée qui dépasse 1 000 mm, dans une installation de coulée continue. L'invention propose des étapes de procédé et une configuration d'installation qui, même lorsque l'on coule des barres d'acier dans une plage d'épaisseur de 360 à 450 mm, garantissent la fabrication de barres d'acier et de brames de haute qualité avec une bonne qualité intérieure et une moindre sensibilité à la fissuration.
PCT/EP2009/054813 2008-05-20 2009-04-22 Procédé et installation de coulée continue pour la fabrication de brames épaisses Ceased WO2009141207A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR2020107000031U KR20110002081U (ko) 2008-05-20 2009-04-22 두꺼운 슬래브들을 제조하기 위한 방법 및 연속 주조 플랜트
DE212009000056U DE212009000056U1 (de) 2008-05-20 2009-04-22 Stranggießanlage zum Herstellen von dicken Brammen
CN200990100251XU CN202015821U (zh) 2008-05-20 2009-04-22 用于制造厚板坯的方法和连铸设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA809/2008 2008-05-20
AT0080908A AT506823A1 (de) 2008-05-20 2008-05-20 Verfahren und stranggiessanlage zum herstellen von dicken brammen

Publications (1)

Publication Number Publication Date
WO2009141207A1 true WO2009141207A1 (fr) 2009-11-26

Family

ID=40796189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/054813 Ceased WO2009141207A1 (fr) 2008-05-20 2009-04-22 Procédé et installation de coulée continue pour la fabrication de brames épaisses

Country Status (5)

Country Link
KR (1) KR20110002081U (fr)
CN (1) CN202015821U (fr)
AT (1) AT506823A1 (fr)
DE (1) DE212009000056U1 (fr)
WO (1) WO2009141207A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012139968A1 (fr) * 2011-04-13 2012-10-18 Sms Siemag Ag Procédé et installation de coulée continue verticale permettant de produire des brames épaisses à partir d'une masse de métal fondu
CN107626902A (zh) * 2017-08-31 2018-01-26 武汉钢铁有限公司 提高桥梁用钢铸坯质量的方法
CN114951575A (zh) * 2022-05-05 2022-08-30 河北工程大学 一种冷镦钢连铸装置及其连铸工艺
WO2025185877A1 (fr) 2024-03-05 2025-09-12 Primetals Technologies Austria GmbH Équipement de coulée et de laminage combinés présentant une productivité améliorée

Families Citing this family (7)

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CN101698224B (zh) * 2009-11-20 2011-08-10 北京科技大学 连铸坯二冷冷却水量与电磁搅拌器的动态控制方法
CN103128237B (zh) * 2011-12-02 2014-08-06 中冶赛迪工程技术股份有限公司 一种特厚板坯连铸机及其用于生产特厚板坯的方法
DE102014105870B4 (de) 2014-04-25 2024-10-10 Thyssenkrupp Ag Verfahren und Vorrichtung zum Dünnbrammen-Stranggießen
DE102017213647A1 (de) 2017-03-29 2018-10-04 Sms Group Gmbh Stranggießanlage und Verfahren zu deren Betrieb
KR102008369B1 (ko) * 2017-12-13 2019-08-07 주식회사 포스코 유체 분사장치 및 유체 분사방법
CN109158561B (zh) * 2018-04-25 2024-03-22 西安麦特沃金液控技术有限公司 一种引锭杆处理装置及立式连续铸造系统
AT522265B1 (de) * 2019-03-06 2021-12-15 Primetals Technologies Austria GmbH Umbau einer stranggiessanlage für knüppel- oder vorblockstränge

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IN155878B (fr) 1980-04-02 1985-03-23 Nippon Steel Corp
US6241004B1 (en) 1996-05-13 2001-06-05 Ebis Corporation Method and apparatus for continuous casting

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HARSTE K ET AL: "DIE NEUE STRANGGIESSANLAGE DER DILLINGER HUETTE ALS VORSTUFE ZUR ERZEUGUNG VON GROBBLECHEN MIT HOECHSTEN QUALITAETSANTFORDERUNGEN THE NEW CONTINUOUS CASTER AT DILLINGER HUETTE TO PRODUCE SEMI PRODUCTS FOR HIGH QUALITY HEAVY PLATES", STAHL UND EISEN, VERLAG STAHLEISEN, DUSSELDORF, DE, vol. 120, no. 2, 15 February 2000 (2000-02-15), pages 53 - 59, XP000933034, ISSN: 0340-4803 *
HARSTE K ET AL: "NEUBAU EINER VERTIKALSTRANGGIESSANLAGE BEI DER AG DER DILLINGER HUETTENWERKE", STAHL UND EISEN, VERLAG STAHLEISEN, DUSSELDORF, DE, vol. 117, no. 11, 10 November 1997 (1997-11-10), pages 73 - 79,153, XP000737187, ISSN: 0340-4803 *
HARSTE KLAUS ET AL: "Optimierung und Überwachung der Prozessführung beim Stranggiessen von Stahl = Optimization and monitoring of process control in the continuous casting of steel", STAHL UND EISEN, VERLAG STAHLEISEN, DUSSELDORF, DE, vol. 113, no. 7, 19 July 1993 (1993-07-19), pages 51 - 58, XP001539395, ISSN: 0340-4803 *
PENNERSTORFER P ET AL: "Production of 355-mm-thick slabs on the voestalpine CC5 conventional bow-type caster with straight mold and 10-m radius", AISTECH. IRON AND STEEL TECHNOLOGY CONFERENCE PROCEEDINGS, ASSOCIATION FOR IRON AND STEEL TECHNOLOGY, US, 5 May 2008 (2008-05-05), pages 11 - 19, XP009119556 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012139968A1 (fr) * 2011-04-13 2012-10-18 Sms Siemag Ag Procédé et installation de coulée continue verticale permettant de produire des brames épaisses à partir d'une masse de métal fondu
TWI496633B (zh) * 2011-04-13 2015-08-21 Sms Siemag Ag 由金屬熔融物製造厚鋼板的方法與垂直連續鑄造裝置
CN107626902A (zh) * 2017-08-31 2018-01-26 武汉钢铁有限公司 提高桥梁用钢铸坯质量的方法
CN114951575A (zh) * 2022-05-05 2022-08-30 河北工程大学 一种冷镦钢连铸装置及其连铸工艺
WO2025185877A1 (fr) 2024-03-05 2025-09-12 Primetals Technologies Austria GmbH Équipement de coulée et de laminage combinés présentant une productivité améliorée

Also Published As

Publication number Publication date
CN202015821U (zh) 2011-10-26
KR20110002081U (ko) 2011-03-03
AT506823A1 (de) 2009-12-15
DE212009000056U1 (de) 2011-04-21

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