EP0238844B1 - Procédé pour démarrer une machine de coulée continue d'acier en bande - Google Patents

Procédé pour démarrer une machine de coulée continue d'acier en bande Download PDF

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Publication number
EP0238844B1
EP0238844B1 EP87102282A EP87102282A EP0238844B1 EP 0238844 B1 EP0238844 B1 EP 0238844B1 EP 87102282 A EP87102282 A EP 87102282A EP 87102282 A EP87102282 A EP 87102282A EP 0238844 B1 EP0238844 B1 EP 0238844B1
Authority
EP
European Patent Office
Prior art keywords
casting
pouring
level
strip
chill mould
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.)
Expired - Lifetime
Application number
EP87102282A
Other languages
German (de)
English (en)
Other versions
EP0238844A1 (fr
Inventor
Günter Dr. Flemming
Hans Streubel
Manfred Kolakowski
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 Siemag AG
Original Assignee
SMS Schloemann 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
Priority to IN98/MAS/87A priority Critical patent/IN169225B/en
Application filed by SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT87102282T priority patent/ATE51782T1/de
Publication of EP0238844A1 publication Critical patent/EP0238844A1/fr
Application granted granted Critical
Publication of EP0238844B1 publication Critical patent/EP0238844B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
    • B22D11/202—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level by measuring temperature
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock

Definitions

  • the invention relates to a method for casting on a steel strip casting installation with a mold with cooled narrow side walls and wide side walls, which has a pouring area which is widened upwards in the area of the wide side walls for receiving a pouring tube above a format-determining parallel section.
  • the object is achieved in that the period limited by the effectiveness of the pre-lubrication and reoxidation of the bath level not covered is better utilized.
  • the solution according to the invention is that the height of the casting level is tracked away, that the strand withdrawal between the entry of the casting level into the extended pouring area of the mold and covering of the pouring tube outlet openings is started and until the target level is reached to a minimum withdrawal speed v B m, at which the The bottom of the pouring sump remains below the format-determining parallel section.
  • the new process enables more precise control and automation of the casting process, which relieves the operating personnel, avoids operating errors and improves overall operational safety.
  • the method takes into account in particular the fact that a heterogeneous zone of crystal growth forms within the metal sump starting from the strand shell. Different growth of the crystals of opposing walls can lead to the formation of bridges in the pouring area, which oppose a reduction in the strip thickness and hinder the strip outfeed.
  • the strand withdrawal is started between 15 and 25 seconds after the start of pouring.
  • the minimum take-off speed is 1.1 m / min.
  • the respective height of the mold level is advantageously determined by measuring the temperature within the mold walls.
  • the height of the end of the casting sump is determined by continuous force measurement on the broad side surface of the strip immediately below the mold.
  • the height of the end of the casting sump can alternatively be determined by continuous ultrasound measurement in the strip thickness direction immediately below the mold.
  • the pouring tube can be brought into a lower pouring position for casting and can be raised to a normal operating position after covering the pouring tube outlet openings.
  • the mold is moved in an oscillating manner.
  • measurement data of the localization of the mold level and the bottom of the pouring sump are continuously fed to a process computer and, after comparison of the setpoint and actual value, the strip take-off speed v B and the corresponding casting speed v E are regulated.
  • the time of the powder application to the casting level can be determined by the process computer.
  • a steel strip caster for carrying out the method has several thermal sensors in the pouring area and in the parallel area of the broad side walls of the mold. To determine the end of the casting sump, the strand guide elements immediately downstream of the mold are provided with force sensors.
  • molten steel 1 flows from a casting tank 2 from a height-adjustable stopper 3 through a pouring pipe 4 into a mold 5, which is formed by two opposite broad side walls 6 and two narrow side walls 7. Broad side walls 6 and narrow side walls 7 are provided with cooling channels 8. An oscillation device for the mold is indicated by arrows 9.
  • the broad side walls 6 form, above a format-determining parallel section 10, a pouring region 11 which widens upwards to accommodate the pouring tube 4.
  • the molten steel 1 flowing into the mold 5 at the start of casting connects to a starting head 12 which is fastened to a starting strand 13.
  • the casting mold 14 which forms rises above the lateral outflow openings 15 of the yaw tube 4 and is then covered by casting powder for lubrication and to prevent oxidation.
  • Thermocouples 16 are provided in the broad side walls to determine the instantaneous height of the mold level 14.
  • the starting strand 13 is located in a strand guide consisting of rollers 17 and arranged downstream of the mold.
  • a driver 18 for conveying the starting strand 13 and then the cast steel strip is arranged.
  • a measuring device 19 for determining the force acting on the belt shell 22 from ferrostatic pressure is arranged directly below the mold 5. Force sensors 19 are used for this
  • thermocouples 16 and force sensors 19 are fed to a process computer 20 which, after comparison of the target value and actual value, determines the required strip take-off speed v B for the drivers 18 and the corresponding pouring speed v E for the actuator 21 of the stopper 3.
  • the liquid steel solidifies on the cooled Brietrichweiten 6 and narrow side walls 7 of the mold 5 to band shells 22, the thickness of which increases downwards.
  • the band shells 22 which form in the region of the enlarged pouring area 11 on the broad side walls 6 are brought closer to one another in the course of the lowering movement to the format-determining parallel section 10.
  • the mold walls 6, 7 are lubricated before the start of casting. Thereafter, the casting process shown in FIG. 3 in phases A, B, C, D - F and in FIG. 4 in diagrams for the casting speed VE and the strip removal speed v B is carried out synchronously.

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

Claims (11)

1. Procédé pour le démarrage de la coulée dans une installation de coulée de bandes d'acier, comportant une lingotière de coulée continue équipée de grandes et de petites parois latérales refroidies, lingotière présentant, au-delà d'un tronçon parallèle définissant les dimensions, une zone d'admission du métal en fusion évasée vers le haut dans le domaine des grandes parois latérales, destinée à la disposition d'une busette de coulée, caractérisé en ce qu'on suit la hauteur du niveau de coulée (14), en ce qu'on démarre l'extraction de la brame entre l'entrée du niveau de coulée (14) dans la zone d'admission élargie (11) de la lingotière (5) et le recouvrement des ouvertures d'évacuation (15) de la busette de coulée et l'augmente à une vitesse d'extraction minimum VBm jusqu'à ce que le niveau de consigne soit atteint, vitesse d'extraction minimum VBm à laquelle l'extrémité du cratère liquide (23) reste en dessous du tronçon parallèle (10) déterminant les dimensions.
2. Procédé selon la revendication 1 caractérisé en ce que, dans le cas de la coulée de bandes d'acier ayant une épaisseur de 50 mm, on démarre l'extraction de la brame entre 15 et 25 secondes après le début de coulée et en ce que la vitesse d'extraction minimum est de 1,1 m/min.
3. Procédé selon la revendication 1 caractérisé en ce que la hauteur du niveau de coulée (14) est déterminée par des mesures de température à l'intérieur des parois (6) de lingotière.
4. Procédé selon la revendication 1 caractérisé en ce que la hauteur de l'extrémité du cratère liquide (23) est déterminée par mesure continue de la force sur la surface (des grands côtés) de la bande, en dessous de la lingotière (5).
5. Procédé selon la revendication 1 caractérisé en ce que la hauteur de l'extrémité du cratère liquide (23) est déterminée par mesure continue par ultrasons dans la direction de l'épaisseur de la bande, en dessous de la lingotière (5).
6. Procédé selon la revendication 1, caractérisé en ce que la busette de coulée (4) se trouve dans une position inférieure de démarrage pour le démarrage de la coulée et est amenée dans une position de fonctionnement supérieure, après recouvrement des ouvertures d'évacuation (15) de la busette de coulée.
7. Procédé selon la revendication 1, caractérisé en ce que la lingotière (5) est entraînée dans un mouvement oscillant dès le début de l'extraction de brame.
8. Système de régulation selon l'une ou plusieurs des revendications 1 à 7 caractérisé en ce qu'on envoie continuellement des données de mesure de la localisation du niveau de coulée et de l'extrémité du cratère liquide à un calculateur (20) et en ce qu'on règle la vitesse d'extraction de bande VB et la vitesse de coulée correspondante VE après comparaison entre les valeurs réelles et les valeurs de consigne.
9. Système de régulation selon la revendication 8 caractérisé en ce que le moment de déversement de poudre sur le niveau de coulée (14) est déterminé par le calculateur (20).
10. Dispositif pour la mise en oeuvre du procédé selon l'une ou plusieurs des revendications 1 à 7 caractérisé par plusieurs thermocouples ou sondes thermiques (16) agencés dans la zone d'admission (11) et dans le tronçon parallèle (10) des grandes parois latérales (6).
11. Dispositif pour la mise en oeuvre du procédé selon l'une ou plusieurs des revendications 1 à 7 caractérisé en ce que des organes de guidage de brame agencés immédiatement en aval de la lingotière sont équipés de capteurs de force (19).
EP87102282A 1986-02-27 1987-02-18 Procédé pour démarrer une machine de coulée continue d'acier en bande Expired - Lifetime EP0238844B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IN98/MAS/87A IN169225B (fr) 1986-02-27 1987-02-13
AT87102282T ATE51782T1 (de) 1986-02-27 1987-02-18 Verfahren zum angiessen einer stahlbandgiessanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3606290 1986-02-27
DE3606290 1986-02-27

Publications (2)

Publication Number Publication Date
EP0238844A1 EP0238844A1 (fr) 1987-09-30
EP0238844B1 true EP0238844B1 (fr) 1990-04-11

Family

ID=6295020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102282A Expired - Lifetime EP0238844B1 (fr) 1986-02-27 1987-02-18 Procédé pour démarrer une machine de coulée continue d'acier en bande

Country Status (8)

Country Link
US (1) US4787438A (fr)
EP (1) EP0238844B1 (fr)
JP (1) JPS62203651A (fr)
KR (1) KR950014347B1 (fr)
CN (1) CN1011387B (fr)
CA (1) CA1286874C (fr)
DE (1) DE3762192D1 (fr)
ES (1) ES2014002B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131829A1 (de) * 1990-10-02 1992-04-16 Mannesmann Ag Fluessigkeitsgekuehlte kokille fuer das stranggiessen von straengen aus stahl im brammenformat

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801932A1 (de) * 1988-01-23 1989-08-03 Schloemann Siemag Ag Verfahren zum giessen eines stahlbandes in einer stahlbandgiessanlage
WO1990011150A1 (fr) * 1989-03-23 1990-10-04 Siemens Aktiengesellschaft Procede de regulation de la coulee continue d'acier
DE4103963A1 (de) * 1991-02-09 1992-08-13 Kabelmetal Ag Verfahren zum kontinuierlichen stranggiessen von kupferlegierungen
IT1262073B (it) * 1993-02-16 1996-06-19 Danieli Off Mecc Lingottiera per colata continua di bramme sottili
AT404105B (de) * 1995-07-27 1998-08-25 Voest Alpine Ind Anlagen Verfahren zum stranggiessen einer metallschmelze
JP3197230B2 (ja) * 1997-04-08 2001-08-13 三菱重工業株式会社 ビレット連続鋳造機及び鋳造方法
US7549797B2 (en) * 2007-02-21 2009-06-23 Rosemount Aerospace Inc. Temperature measurement system
CN103706769B (zh) * 2014-01-22 2015-09-30 上海星祥电气有限公司 立式连续铸造装置及其方法
PL3259565T3 (pl) * 2015-02-20 2022-01-10 Ergolines Lab S.R.L. Sposób, układ i czujnik pomiarowy dla maszyny do odlewania ciągłego
CN107586965A (zh) * 2016-07-06 2018-01-16 宁波江丰电子材料股份有限公司 熔炼设备以及熔炼方法
CN110749616B (zh) * 2019-11-21 2022-03-08 沈阳工业大学 一种底注式测试合金热裂倾向性的实验装置及方法

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
DE887990C (de) * 1951-05-07 1953-08-27 Irving Rossi Wassergekuehlte Stranggiessform
US3204460A (en) * 1962-08-13 1965-09-07 United States Steel Corp System for indicating the liquid level in a continuous-casting mold or the like
US3995681A (en) * 1973-05-30 1976-12-07 Concast Ag Apparatus for applying flux powder to the bath level in a continuous casting mold
US3893502A (en) * 1974-05-31 1975-07-08 United States Steel Corp Method and mechanism for indicating mold friction in a continuous-casting machine
JPS55141366A (en) * 1979-04-24 1980-11-05 Sumitomo Metal Ind Ltd Preventing method of tundish nozzle clogging for continuous casting and its device
JPS56151147A (en) * 1980-04-24 1981-11-24 Nippon Steel Corp Method for detecting leading end position of unsolidified part of continuously cast ingot
JPS5732863A (en) * 1980-08-07 1982-02-22 Nippon Steel Corp Method for estimating leading end of crater in continuous casting
US4383571A (en) * 1981-03-16 1983-05-17 Gladwin Corporation Dummy bar for continuous casting equipment
JPS57159251A (en) * 1981-03-27 1982-10-01 Sumitomo Metal Ind Ltd Measuring method for moltem metal level in continuous casting mold
JPS5884652A (ja) * 1981-11-13 1983-05-20 Kawasaki Steel Corp 連続鋳造の自動鋳込み制御方法
US4573128A (en) * 1983-03-31 1986-02-25 United States Steel Corporation Digital method for the measurement and control of liquid level in a continuous casting mold
DE3400220A1 (de) * 1984-01-05 1985-07-18 SMS Schloemann-Siemag AG, 4000 Düsseldorf Kokille zum stranggiessen von stahlband
DE3606289A1 (de) * 1986-02-27 1987-09-03 Schloemann Siemag Ag Verfahren zur beendigung des giessbetriebes einer stahlbandgiessanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131829A1 (de) * 1990-10-02 1992-04-16 Mannesmann Ag Fluessigkeitsgekuehlte kokille fuer das stranggiessen von straengen aus stahl im brammenformat

Also Published As

Publication number Publication date
KR950014347B1 (ko) 1995-11-25
CN1011387B (zh) 1991-01-30
KR870007738A (ko) 1987-09-21
EP0238844A1 (fr) 1987-09-30
DE3762192D1 (de) 1990-05-17
CN87100985A (zh) 1987-09-09
CA1286874C (fr) 1991-07-30
ES2014002B3 (es) 1990-06-16
JPS62203651A (ja) 1987-09-08
US4787438A (en) 1988-11-29

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