EP2416900B1 - Procédé et dispositif servant à préparer un produit de laminage à chaud - Google Patents

Procédé et dispositif servant à préparer un produit de laminage à chaud Download PDF

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Publication number
EP2416900B1
EP2416900B1 EP10711199.9A EP10711199A EP2416900B1 EP 2416900 B1 EP2416900 B1 EP 2416900B1 EP 10711199 A EP10711199 A EP 10711199A EP 2416900 B1 EP2416900 B1 EP 2416900B1
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Prior art keywords
rolling stock
rolling
rotor
temperature
induction furnace
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EP10711199.9A
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German (de)
English (en)
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EP2416900B2 (fr
EP2416900A1 (fr
Inventor
Reinhard Karl
Gerald Hohenbichler
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Primetals Technologies Austria GmbH
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Siemens VAI Metals Technologies GmbH Austria
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0035—Forging or pressing devices as units
    • B21B15/005—Lubricating, cooling or heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material

Definitions

  • the present invention relates to a method and an apparatus for processing hot rolled stock prior to forming in at least one rolling stand or a rolling scale.
  • Devices for implementing the method for processing rolling stock before forming in at least one rolling stand or a rolling scale essentially comprise an induction furnace, followed by a descaling device and at least one rolling stand or a rolling scale.
  • a cast strand cast in a continuous casting process is descaled, heated to rolling temperature and finish rolled in a multi-stand hot strip rolling train, the casting strand after emerging from a strand guide, before entering a heat balance furnace and / or after exiting a heat balance furnace and entering the hot strip mill train is freed of scale and / or Giesspulver on one or both strand surfaces by a plurality of rotating nozzles from which printing fluid is injected.
  • the object of the invention is to provide a method and an apparatus for processing hot rolled material prior to forming in a rolling stand or a rolling scale, which has a high energy efficiency and a high Entzu substantials antique, the associated device having compact dimensions.
  • the rolling stock may be, for example, a thin or thick slab or a finite or endless hot strand (eg from an ESP Endless Strip Production, CSP Compact Strip Production or similar installations). Furthermore, it does not matter whether the rolling in the roll stand or the rolling scale is a preliminary, intermediate or finish rolling.
  • the warmed rolling stock is characterized by at least one rotating jet of water or liquid from at least one rotor of the rotary descaling device (rotation descaling devices are known to those skilled in the art, for which reason a basic description of the patent application W097 / 27955 A1 the applicant) is descaled, whereby the rolling stock is cooled only slightly at high Entzu permitteds antique.
  • At least one actual temperature of the rolling stock is detected by means of the temperature measuring device, eg a pyrometer or a thermographic camera, and fed to the controller.
  • the analog or digital controller determines with the aid of a linear or preferably nonlinear control law and taking into account a target temperature at least one manipulated variable which is fed to a control element, wherein at least one inductor of the induction furnace is controlled so that the temperature of the descaled Walguts the target Temperature corresponds as possible.
  • the inventive method ensures that the rolling stock is optimally prepared for a subsequent rolling process, wherein the rolling stock is heated very energy efficient and then descaled with the lowest possible temperature drop and high Entzu substantials antique.
  • the control of the temperature of the rolling stock when entering the first rolling stand or the rolling scale also ensures that the rolling stock has the correct temperature for the subsequent thermo-mechanical forming, whereby a high quality of the rolled product is ensured.
  • a temperature profile that is, the discrete or continuous temperature distribution as a function of the width direction, of the descaled rolling stock detected by means of a temperature profile measuring device and fed to a controller.
  • the width direction is the direction which is orthogonal to the transport direction and to the thickness direction of the rolling stock.
  • the controller determines, with the aid of a control law and taking into account a desired temperature profile, several control variables that are supplied to a plurality of control elements, wherein a plurality of inductors of the induction furnace are controlled so that the temperature profile of the descaled Walguts the setpoint temperature profile corresponds as possible.
  • the rolling stock is heated in the induction furnace by means of at least one inductor with Lekssfeld- or transverse field heating, wherein the inductor is driven in dependence of the manipulated variable with variable power and optionally variable frequency.
  • inductors are known to those skilled in the art e.g. from the textbook
  • an inductor with longitudinal field heating essentially generates a magnetic field H or a magnetic flux B in the transport direction of the rolling stock; in contrast, an inductor with transverse field heating essentially generates a magnetic field H or a magnetic flux B in the thickness direction of the rolling stock.
  • an inductor with transverse field heating essentially generates a magnetic field H or a magnetic flux B in the thickness direction of the rolling stock.
  • the heating of the rolling stock in the induction furnace either exclusively by means of multiple inductors with longitudinal field or transverse field heating or a mixture of inductors with L Lucassfeld- and transverse field heating.
  • rolling stock with a thickness ⁇ 6 mm preferably by transverse field heating
  • rolling stock with a thickness> 12 mm preferably by longitudinal field heating to heat.
  • a particularly energy-efficient descaling and a particularly low water consumption of the rotary descaling device is possible when the rotating water jet acting on the rolling stock is interrupted, i. a water jet from a nozzle does not permanently act on the rolling stock during a 360 ° rotation of a rotor of the descaling device. Alternatively, it is of course also possible that the water jet acts permanently on the rolling stock.
  • a particularly high descaling performance can be achieved if the scale layer of the heated rolling stock is considerably cooled by water jets from a pre-cooling device, so that cracks in the scale layer are initiated.
  • the temperature measuring device is advantageous to carry out as a temperature profile measuring device for measuring a plurality of surface temperatures of the rolling stock, the latter being in communication with at least one control device.
  • the induction furnace either exclusively has inductors with longitudinal field or transverse field heating, or in each case has at least one inductor with Lekssfeld- and transverse field heating.
  • a particularly simple disassembly of the rotors is possible if the at least one rotor has a vertical axis of rotation and can be removed in the horizontal direction from the rotary descaling device.
  • a rotor has a breaker for generating an interrupted water jet.
  • resting control discs have proven themselves for this purpose.
  • a particularly low-maintenance construction can be achieved if in each case a rotor has 4 to 12 rotating nozzles.
  • the peripheral speed of the rotors can be kept low, which leads to a particularly low wear of the rotors.
  • a particularly favorable plant configuration can be achieved if, prior to the induction furnace, a cast roll composite, comprising a continuous casting plant and possibly a rough rolling mill, is arranged.
  • a gas-fired preheating furnace may be arranged in front of the induction furnace so that it preheats to a base temperature; However, the fine adjustment is made by a controlled induction furnace.
  • Fig. 1 there is shown a cast-rolling composite plant 1 for continuously producing a hot strip.
  • a molten steel in a continuous casting plant. 2 potted, whereby a continuous strand of a starting material 3 is formed.
  • the starting material is transported uncut by means of a roller table 4 to a roughing train 5, where it is subjected to a deformation in the two-stand rolling mill. Subsequently, the rolling stock 6 with a thickness of 9 mm passes through an induction furnace 7, in which it is heated.
  • the induction furnace 7 five inductors are mounted, wherein the reference numerals 8 and 9 each denote an inductor with longitudinal or transverse field heating.
  • FIG Fig. 2 The construction of an inductor with longitudinal field heating 8 is shown in FIG Fig. 2 shown.
  • a conductor 22 is traversed by a time-varying current I, whereby a magnetic field H and a magnetic flux B is initiated substantially in the longitudinal direction of the rolling stock 10.
  • the magnetic field H and the magnetic flux B are represented by arrows.
  • the magnetic field induces a stress in the rolling stock, whereby the rolling stock is heated by the resulting eddy currents.
  • the conductors 22 enclose the rolling stock 10; for clarity, only 3 windings have been shown, with the number of windings being higher in reality.
  • FIG. 3 The construction of an induction furnace with two inductors with transverse field heating 9 is in Fig. 3 shown.
  • an inductor is arranged above and below the rolling stock 10 parallel to the rolling stock. For clarity, only a few windings were shown at the top of the rolling stock.
  • the inductor consisting From conductors 22, a time-varying current I flows through, whereby a magnetic field H and a magnetic flux B is initiated substantially perpendicular to the surface of the rolling stock 10.
  • the magnetic field H and the magnetic flux B are represented by arrows.
  • the magnetic field induces a stress in the rolling stock, whereby the rolling stock is heated by the resulting eddy currents.
  • the scale layer thickness of the heated rolling stock 10 is determined by means of a scale layer recognition device 11.
  • the information about the actual scale layer thickness is used to adjust a pressure of the water acting on the rotating nozzles of the rotor descaling device.
  • the setting of a fluid pressure is known in the art, so only a few options are listed: For example, the speed and thus the pressure of a high-pressure centrifugal pump can be adjusted, or it is the speed of a positive displacement machine, such as a piston pump, adjusted, with a partial flow of water is driven through a shutter with constant or variable opening in a circuit to the tank.
  • the heated rolling stock 10 is subjected to preliminary cooling by means of a pre-cooler 12 with low pressure compared with the subsequent descaling in a rotary descaling device 13, whereby cracks in the scale layer of the rolling stock are initiated.
  • the rolling stock is descaled in a rotary descaling device.
  • FIG Fig. 4 Details of the rotary descaling device 13 are shown in FIG Fig. 4 shown.
  • the rolling stock 10 is descaled by 8 rotors 23, each having a vertical axis of rotation, wherein in each case 4 rotors are arranged on the top and the bottom of the rolling stock 10.
  • Each rotor carries 8 full jet nozzles, which intermittently - ie not permanently - act on the rolling stock 10.
  • the water pressure will - depending on occurring Scale layer thickness - set between 250 and 420 bar.
  • the speed of the rotors is 500 l / min.
  • the temperature profile of the descaled rolling stock 14 is determined by means of a temperature profile measuring device 15, wherein the temperature profile is understood to mean the temperature profile over the width direction of the rolling stock.
  • the surface temperatures of the 1400 mm wide descaled rolling stock 14 are determined at intervals of 100 mm, so that a total of 15 discrete temperature values are present.
  • This temperature profile 19 is transmitted to a control device 18, which determines five manipulated variables 21, taking into account a desired temperature profile 18 and a non-linear control law.
  • the manipulated variables 21 are used to control the inductors 8 and 9 of the induction furnace 7, so that the measured temperature profile 19 with the target temperature profile 20 matches as possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • General Induction Heating (AREA)

Claims (16)

  1. Procédé servant à préparer un produit de laminage à chaud (6), comprenant les étapes qui consistent
    - à chauffer un produit de laminage (6) dans un four à induction (7) ;
    - à décalaminer le produit de laminage chauffé (10) ;
    - à laminer le produit de laminage décalaminé (14) dans une cage de laminoir ou un train de laminage (16), sachant que
    - le produit de laminage chauffé (10) est décalaminé par au moins un jet d'eau rotatif sortant d'un rotor d'un dispositif de décalaminage rotatif (13) ;
    - au moins une température du produit de laminage décalaminé (14) est détectée au moyen d'un dispositif de mesure de température et transmise à un régulateur (18) ;
    - le régulateur (18), en faisant appel à une loi de régulation et en tenant compte d'une température de consigne, détermine au moins une grandeur de réglage et transmet celle-ci à un organe de réglage, au moins un inducteur (8, 9) du four à induction (7) étant commandé de façon à ce que la température du produit de laminage décalaminé (14) corresponde le plus possible à la température de consigne.
  2. Procédé selon la revendication 1, caractérisé en ce qu'un profil de température du produit de laminage décalaminé (14) est détecté au moyen d'un dispositif de mesure de profil de température (15) et transmis à un régulateur (18) et en ce que ledit régulateur (18), en faisant appel à une loi de régulation et en tenant compte d'un profil de température de consigne, détermine plusieurs grandeurs de réglage et transmet celles-ci à plusieurs organes de réglage, plusieurs inducteurs (8, 9) du four à induction (7) étant commandés de façon à ce que le profil de température du produit de laminage décalaminé (14) corresponde le plus possible au profil de température de consigne.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le produit de laminage (6) est chauffé dans le four à induction (7) au moyen d'au moins un inducteur (8, 9) de chauffage par champ longitudinal ou transversal, ledit inducteur étant commandé à puissance variable et le cas échéant à fréquence variable en fonction de la grandeur de réglage.
  4. Procédé selon la revendication 3, caractérisé en ce que le chauffage du produit de laminage (6) dans le four à induction (7) se fait de la manière suivante :
    - épaisseur du produit de laminage < 6 mm : de préférence par chauffage par champ transversal ;
    - 12 mm > épaisseur du produit de laminage > 6 mm : par respectivement au moins un inducteur de chauffage par champ transversal et champ longitudinal ;
    - épaisseur du produit de laminage > 12 mm : de préférence par chauffage par champ longitudinal.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le jet d'eau appliqué sur le produit de laminage (10) agit en discontinu sur le produit de laminage.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le jet d'eau est produit par au moins un rotor (23) pourvu respectivement d'une, de préférence de 4 à 12 buses rotatives, l'eau alimentant ledit rotor ayant une pression de 100 à 450 bar, de préférence de 250 à 420 bar.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur d'une couche de calamine du produit de laminage chauffé (10) est déterminée au moyen d'un dispositif (11) de détection de l'épaisseur de calamine et en fonction de celle-ci soit
    - la pression de l'eau alimentant le rotor (23), soit
    - la vitesse de rotation du rotor (23)
    est commandée ou réglée de manière contrôlée.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la couche de calamine du produit de laminage chauffé (10) est refroidie de manière substantielle par des jets d'eau sortant d'un dispositif de prérefroidissement (12).
  9. Dispositif (1) servant à préparer un produit de laminage à chaud avant une déformation dans au moins une cage de laminoir ou un train de laminage (16), comprenant un four à induction (7) suivi d'un dispositif de décalaminage et d'au moins une cage de laminoir, sachant que
    - le dispositif de décalaminage est conçu sous forme de dispositif de décalaminage rotatif (13) et comprend au moins un rotor (23) pourvu respectivement d'au moins une buse rotative alimentable en eau ;
    - un dispositif de mesure de température destiné à mesurer la température du produit de laminage (14) est placé en amont d'une première cage de laminoir ; et
    - le dispositif (1) comprend un dispositif de régulation (18) destiné à régler la température du produit de laminage, le dispositif de régulation (18) étant relié au dispositif de mesure de température et à au moins un inducteur du four à induction.
  10. Dispositif selon la revendication 9, caractérisé en ce que le dispositif de mesure de température est conçu sous forme de dispositif de mesure de profil de température (15), ce dernier communiquant avec au moins un dispositif de régulation (18).
  11. Dispositif selon l'une des revendications 9 à 10, caractérisé en ce que le four à induction (7) comprend exclusivement des inducteurs (8, 9) de chauffage par champ longitudinal ou champ transversal, ou bien il comporte au moins un inducteur de chauffage par champ longitudinal et champ transversal.
  12. Dispositif selon l'une des revendications 9 à 11, caractérisé en ce que le au moins un rotor (23) a un axe de rotation vertical et peut être retiré du dispositif de décalaminage rotatif (13) dans le sens horizontal.
  13. Dispositif selon l'une des revendications 9 à 12, caractérisé en ce que chaque rotor (23) comporte un rupteur servant à produire un jet d'eau discontinu.
  14. Dispositif selon l'une des revendications 9 à 13, caractérisé en ce que chaque rotor (23) présente 4 à 12 buses rotatives.
  15. Dispositif selon l'une des revendications 9 à 14, caractérisé en ce qu'un dispositif de détection de l'épaisseur de calamine (11) est placé en aval du four à induction (7) et communique soit
    - avec un dispositif de réglage de pression pour régler l'eau alimentant le rotor (23) ; soit
    - avec un dispositif de réglage de vitesse pour régler la vitesse de rotation du rotor (23).
  16. Dispositif selon l'une des revendications 9 à 15, caractérisé en ce qu'un dispositif de prérefroidissement (12) est placé en amont du dispositif de décalaminage rotatif (13).
EP10711199.9A 2009-04-09 2010-03-22 Procédé et dispositif servant à préparer un produit de laminage à chaud Active EP2416900B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0056409A AT507663B1 (de) 2009-04-09 2009-04-09 Verfahren und vorrichtung zum aufbereiten von warmwalzgut
PCT/EP2010/053680 WO2010115698A1 (fr) 2009-04-09 2010-03-22 Procédé et dispositif servant à préparer un produit de laminage à chaud

Publications (3)

Publication Number Publication Date
EP2416900A1 EP2416900A1 (fr) 2012-02-15
EP2416900B1 true EP2416900B1 (fr) 2013-05-01
EP2416900B2 EP2416900B2 (fr) 2021-12-15

Family

ID=42313046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10711199.9A Active EP2416900B2 (fr) 2009-04-09 2010-03-22 Procédé et dispositif servant à préparer un produit de laminage à chaud

Country Status (8)

Country Link
US (1) US8950227B2 (fr)
EP (1) EP2416900B2 (fr)
KR (1) KR101537539B1 (fr)
CN (1) CN102387874B (fr)
AT (1) AT507663B1 (fr)
BR (1) BRPI1010255A2 (fr)
RU (1) RU2520302C2 (fr)
WO (1) WO2010115698A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3025799A1 (fr) 2014-11-28 2016-06-01 SMS group GmbH Installation de laminage, installation de coulé-laminage et procédé de fabrication d'une bande de métal

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AT507663B1 (de) 2009-04-09 2010-07-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung zum aufbereiten von warmwalzgut
IT1404286B1 (it) 2011-01-24 2013-11-15 Danieli Off Mecc Procedimento di laminazione per nastri e relativa linea di laminazione
IT1403833B1 (it) 2011-02-03 2013-10-31 Danieli Off Mecc Procedimento di laminazione per nastri e relativa linea di laminazione
EP2524971A1 (fr) * 2011-05-20 2012-11-21 Siemens VAI Metals Technologies GmbH Procédé et dispositif de préparation de produits de laminage en acier avant le laminage à chaud
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US10695810B2 (en) * 2015-02-09 2020-06-30 Toshiba Mitsubishi-Electric Industrial Systems Corporation Descaling system, control device of the descaling system, and method for controlling the descaling system
DE102016217562A1 (de) * 2016-03-18 2017-09-21 Sms Group Gmbh Vorrichtung und Verfahren zum Entzundern eines bewegten Werkstücks
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AT522345B1 (de) * 2019-03-29 2020-11-15 Primetals Technologies Austria GmbH Heizungsvorrichtung zum induktiven Erhitzen eines Flachstahlstreifens in einem Warmwalzwerk
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EP3025799A1 (fr) 2014-11-28 2016-06-01 SMS group GmbH Installation de laminage, installation de coulé-laminage et procédé de fabrication d'une bande de métal
WO2016083439A1 (fr) 2014-11-28 2016-06-02 Sms Group Gmbh Laminoir, installation de laminage de coulée continue et procédé de production d'une bande métallique

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AT507663B1 (de) 2010-07-15
KR101537539B1 (ko) 2015-07-17
BRPI1010255A2 (pt) 2016-03-22
AT507663A4 (de) 2010-07-15
WO2010115698A1 (fr) 2010-10-14
CN102387874A (zh) 2012-03-21
RU2520302C2 (ru) 2014-06-20
KR20120004515A (ko) 2012-01-12
EP2416900B2 (fr) 2021-12-15
US8950227B2 (en) 2015-02-10
CN102387874B (zh) 2014-12-10
US20120067095A1 (en) 2012-03-22
RU2011145316A (ru) 2013-05-20
EP2416900A1 (fr) 2012-02-15

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