EP0761829B1 - Vorrichtung zum Kühlen von Walzgut - Google Patents

Vorrichtung zum Kühlen von Walzgut Download PDF

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Publication number
EP0761829B1
EP0761829B1 EP96401941A EP96401941A EP0761829B1 EP 0761829 B1 EP0761829 B1 EP 0761829B1 EP 96401941 A EP96401941 A EP 96401941A EP 96401941 A EP96401941 A EP 96401941A EP 0761829 B1 EP0761829 B1 EP 0761829B1
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EP
European Patent Office
Prior art keywords
gas
rolled product
cooling device
cooling
orifices
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.)
Revoked
Application number
EP96401941A
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English (en)
French (fr)
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EP0761829A1 (de
Inventor
Claude Nivoche
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.)
Andritz Technology and Asset Management GmbH
Original Assignee
Selas SA
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Filing date
Publication date
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Application filed by Selas SA filed Critical Selas SA
Publication of EP0761829A1 publication Critical patent/EP0761829A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material

Definitions

  • the present invention relates to a device for cooling of a ferrous or non-ferrous laminated product ferrous, especially a steel strip.
  • the article "Heating and cooling technology in the continuous annealing" by IMOSE indicates that one can obtain a heat transfer coefficient equal to a maximum of 250 kCal / m 2 .h. ° C by increasing the speed and the volume of projected gas, reducing the distance between the rolled product and the blowing nozzles and enriching the gas with hydrogen. This value of the heat transfer coefficient is however insufficient to obtain a really accelerated cooling of the rolled product.
  • the object of the present invention is to provide a gas spray cooling device which allows a rolled product to be cooled with a heat transfer coefficient greater than 350 kcal / m 2 .h. ° C, while using a harmless gas.
  • the cooling device targeted by the invention makes it possible to cool a rolled product, in particular a steel strip, passing in front of the device which comprises means for pressurizing gas of at least one box, the box comprising several blades forming a duct. , each blade comprising at least one gas outlet orifice in the direction of at least one of the surfaces of the laminated product, the orifices of each blade being aligned in the transverse direction of the laminated product, each space separating two adjacent blades to a depth in a direction perpendicular to the surface of the rolled product and a width in the longitudinal direction of the rolled product which define a section (S) in m 2 in a plane perpendicular to the rolled product and parallel to the running direction of the rolled product.
  • this cooling device is characterized in that the section (S) is such that the ratio of the gas flow rate in m 3 / s at the outlet of all of the orifices of a blade on the section (S ) is always less than 20, in order to allow the evacuation of the gas without disturbing the gas outlet of the adjacent blades.
  • the gas circulation in the cooling device is regular, and the gas can be evacuated without generating preferential cooling of the banks.
  • the device of the invention is therefore perfectly suitable for continuous heat treatment, such as that used in steel processing lines continuously.
  • the depth of each space is more than 200 mm, and preferably 300 mm.
  • the distance between adjacent slats is included between 0.8 and 5 times the distance between each orifice of the same blade.
  • a cooling installation comprising at least one cooling device is characterized in that stabilizing rollers are arranged on the side and other of the cooling device (s), said rollers being able to deflect the product laminated at an angle of less than 7 °.
  • the cooling device according to the invention is intended in particular to be integrated into a continuous annealing line such as that used conventionally for the processing of tapes of steel.
  • These steel strips have a thickness comprised between 0.15 and 2.3 mm. Their width is around 0.6 at 2 m.
  • the cooling device includes gas pressurization means 4 of a box 1.
  • Box 1 extends parallel to the surface rolled product and is supplied by at least one fan 4 intended to introduce at a high flow rate pressurized cooling gas 5 in the box.
  • a fan 4 intended to introduce at a high flow rate pressurized cooling gas 5 in the box.
  • several fans of blowing could be used and spread evenly over the height of the cabinet. We could also replace the fan with a compressor.
  • the device of the invention comprises a second box 10, positioned symmetrically with respect to the product laminated, so that the latter is cooled on these two opposite sides at the same time.
  • the box includes several blades forming conduit 11, outlet ports 12 for gas 5 in direction of the surface of the rolled product 1 being provided at the end of these blades 11.
  • the orifices 12 of each blade 11 are aligned in the transverse direction of the rolled product 1.
  • each space 13 separating two adjacent blades has a depth P in a direction perpendicular to the surface of the rolled product 1 and a width L in the longitudinal direction of rolled product 1 sufficient to allow gas to escape 5.
  • Each orifice 12 opens at the end of a conduit formed by a blade 11 extending from the box 10 in the direction of the rolled product.
  • Gas 5 can escape backwards after its contact on the laminated product, between the different blades.
  • cooling should be done under a protective atmosphere, such as a mixture nitrogen and hydrogen
  • the entire system of cooling is surrounded in a known manner by a waterproof casing to recover the projected gas in order to recycle it continuously in the disposal means under gas pressure. Recycling includes a step gas recovery, a cooling step of this one and a reinjection step.
  • the gas temperature in the box is less than 100 ° C.
  • the distance D between the blades adjacent 11 is between 0.8 and 5 times the distance d separating each orifice 12 from the same blade 11. This distance D corresponds to the distance between the blades 11, in the direction F of travel, at the height of outlet ports 12.
  • each orifice 12 from a same series is uniform.
  • the distance D between two blades adjacent is between 30 and 200 mm.
  • the holes can be aligned in the longitudinal direction of the rolled product so that they form the four corners of contiguous squares.
  • the orifices can also be arranged in staggered as shown in Figure 1 and formed thus the corners of contiguous diamonds.
  • the distribution of gas jets cooling is therefore uniform over the entire surface of the rolled product.
  • the holes are circular holes, rectangular, oblong, etc., or small slits.
  • Each blade may also have only one outlet forming a slit opposite the rolled product.
  • each space of separation 13 is greater than 200 mm, and preferably greater than 300 mm.
  • Section S corresponds to the section in a plane perpendicular to the rolled product and parallel to the direction of travel of this product.
  • the equivalent diameter of the orifices 12 can be between 5 and 15 mm: the equivalent diameter corresponds to the diameter of the circle having an equal surface to that of the orifice section.
  • the cooling device it is advantageous to arrange the cooling device so that the outlet ports 12 are at a distance 1 of the surface of the rolled product 1 of between five and twelve times the equivalent diameter of the orifice 12, and preferably between six and eight times the diameter equivalent.
  • the boxes 10 can be mobile in a direction perpendicular to the rolled product 1, so that they can be brought closer or further away from the laminated product.
  • each duct blade 11 has a decreasing section in the direction of gas flow, i.e. from the box to outlet 12.
  • the outlet orifice 12 is profiled so that its section is substantially the same as the section of exit of the blade 11. This construction allows obtain a gas at high speed by limiting parasitic pressure losses
  • Blades and holes can be made indifferently by molding, forming, stamping, assembly and / or machining.
  • an installation of cooling according to the invention comprises at least a cooling device 21.
  • Rollers stabilizers 20 are arranged on either side of the or cooling devices 21, the rollers being adapted to cause lower deflection or equal to 7 ° of the rolled product 1.
  • rollers limit the vibration of the product, especially when the distance 1 between the orifices 12 of this product is weak.
  • These rollers are movable laterally, i.e. perpendicular to the rolled product, to align it and are motorized to drive the product scrolling.
  • the distance separating in height two series of rollers 20 is less than or equal to 6 m and the height of a stack of conduits in the same device 21 is less than or equal to 5m. We thus limit at best the vibrations of the product while obtaining a power very important cooling.
  • the cooling device includes preferably a number of blades superimposed in the direction longitudinal of the rolled product and each blade has a number of orifices 12 such that the total section of device openings is between 1 and 5% of the surface covered by all of the blades, and preferably between 2 and 4% of this area.
  • the cooling device comprises at minus one box 10 placed on each side of the product the mine.
  • it includes several boxes 10a, 10b arranged on the same side of the rolled product 1.
  • One to seven boxes are thus provided positioned side by side. side in the width of the rolled product and the pressure is independently regulated to ensure the transverse homogeneity of the cooling.
  • the gas used consists of a mixture of hydrogen and nitrogen, the proportion of hydrogen being preferably less than or equal to 5%.
  • This gas can also be air or pure nitrogen.
  • the cooling device it is possible to cool a steel strip with a thickness of 0.8 mm with a cooling rate greater than 80 ° C./s, that is to say corresponding to a transfer coefficient at least equal to 400kCal / m 2 .h. ° C.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Metal Rolling (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Continuous Casting (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Claims (11)

  1. Vorrichtung zum Kühlen eines Walzguts (1), insbesondere ein Stahlband, das vor der genannten Vorrichtung kontinuierlich abläuft, mit Mitteln um wenigstens einen Druckbehälter (10) unter Druck zu setzen, der genannte Druckbehälter (10) mehrere, eine Leitung bildende Lamellen (11) umfasst, jede Lamelle (11) wenigstens eine Ausgangsöffnung (12) für das Gas in Richtung wenigstens einer der Oberflächen des Walzguts (1) umfasst, die Öffnungen (12) jeder Lamelle (11) entsprechend der Querrichtung des Walzguts ausgerichtet sind, jeder zwei angrenzende Lamellen (11) trennende Zwischenraum (13) eine Tiefe (P) in einer zur Oberfläche des Walzguts (1) senkrechten Richtung und eine Breite (L) in der Längsrichtung des Walzguts aufweist, wobei diese einen Querschnitt (S) in m2 in einer Ebene senkrecht zum Walzprodukt (1) und parallel zur Ablaufrichtung des genannten Walzprodukts definieren, dadurch gekennzeichnet, dass der genannte Querschnitt (S) derart ist, dass das Verhältnis des Gasdurchsatzes (5) in m3/s am Ausgang der Gesamtheit der Öffnungen (12) einer Lamelle (11) zu dem genannten Querschnitt (S) in m2 immer unterhalb von 20 ist, um den Abzug des Gases (5) zu ermöglichen ohne den Austritt des Gases der angrenzenden Lamellen zu stören.
  2. Vorrichtung zum Kühlen nach Anspruch 1, dadurch gekennzeichnet, dass die Tiefe (P) jedes Zwischenraums (13) größer als 200 mm, vorzugsweise größer als 300 mm, ist.
  3. Vorrichtung zum Kühlen nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der die angrenzenden Lamellen trennende Abstand (D) zwischen dem 0,8 und 5-fachen des jede Öffnung (12) einer gleichen Lamelle (11) trennenden Abstandes (d) liegt.
  4. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der die angrenzenden Lamellen trennende Abstand (D) zwischen 30 und 200 mm liegt.
  5. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der jede Öffnung (12) einer gleichen Lamelle (11) trennende Abstand (d) einheitlich ist.
  6. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Querschnitt der Lamellen (11) vom Druckbehälter (10) zu den Öffnungen (12) hin abnimmt.
  7. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sie mehrere Druckbehälter (10a, 10b) aufweist, die auf einer gleichen Seite des Walzguts (1) angeordnet und nebeneinander in der Breite des Walzguts positioniert sind, wobei der Druck jedes Druckbehälters (10a, 10b) voneinander unabhängig reguliert wird.
  8. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der die Öffnungen (12) von der Oberfläche des Walzguts trennende Abstand (1) zwischen dem 5 und 12-fachen des den Öffnungen (12) äquivalenten Durchmessers liegt.
  9. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Gas (5) aus einer Mischung aus Wasserstoff und Stickstoff besteht, wobei die genannte Vorrichtung von einer gasdichten Hülle umgeben ist und das Gas (5) kontinuierlich wieder aufbereitet wird.
  10. Vorrichtung zum Kühlen nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Lamellen (11) und die Öffnungen (12) durch Gießen, Formpressen, Tiefen, Zusammenfügen und/oder maschinelle Bearbeitung hergestellt sind.
  11. Kühlanlage mit wenigstens einer Vorrichtung zum Kühlen (21) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass Stabilisierungswalzen (20) auf beiden Seiten der oder den Vorrichtungen zum Kühlen (21) angeordnet sind, wobei die genannten Walzen so ausgelegt sind, dass sie das Walzgut (1) in einem Winkel von weniger als 7° ablenken.
EP96401941A 1995-09-12 1996-09-11 Vorrichtung zum Kühlen von Walzgut Revoked EP0761829B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9510669 1995-09-12
FR9510669A FR2738577B1 (fr) 1995-09-12 1995-09-12 Dispositif de refroidissement d'un produit lamine

Publications (2)

Publication Number Publication Date
EP0761829A1 EP0761829A1 (de) 1997-03-12
EP0761829B1 true EP0761829B1 (de) 2000-12-06

Family

ID=9482468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401941A Revoked EP0761829B1 (de) 1995-09-12 1996-09-11 Vorrichtung zum Kühlen von Walzgut

Country Status (7)

Country Link
US (1) US5871686A (de)
EP (1) EP0761829B1 (de)
KR (1) KR100441365B1 (de)
AT (1) ATE197968T1 (de)
AU (1) AU709914B2 (de)
DE (2) DE69611129T2 (de)
FR (1) FR2738577B1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011087A3 (fr) * 1997-04-04 1999-04-06 Cockerill Sambre Sa Dispositif de refroidissement de tole dans une ligne continue.
FR2789757B1 (fr) * 1999-02-16 2001-05-11 Selas Sa Dispositif d'echange de chaleur avec un produit plat
BRPI0614131B1 (pt) * 2005-08-01 2014-04-15 Ebner Ind Ofenbau Dispositivo para resfriamento de uma fita metálica
AT502239B1 (de) * 2005-08-01 2007-07-15 Ebner Ind Ofenbau Vorrichtung zum kühlen eines metallbandes
PT2100673E (pt) * 2008-03-14 2011-04-01 Arcelormittal France Processo e dispositivo de sopragem de gás sobre uma banda em movimento contínuo
JP2013185217A (ja) * 2012-03-08 2013-09-19 Nippon Steel & Sumikin Engineering Co Ltd 鋼帯の冷却装置
EP2933342A1 (de) * 2014-04-15 2015-10-21 Böhler-Uddeholm Precision Strip GmbH Verfahren und Vorrichtung zur Herstellung eines Bandstahls mit bainitischer Gefügestruktur
ES2781198T3 (es) 2015-05-29 2020-08-31 Voestalpine Stahl Gmbh Método para el enfriamiento sin contacto de chapas de acero y dispositivo para ello
DE102017111991B4 (de) 2017-05-31 2019-01-10 Voestalpine Additive Manufacturing Center Gmbh Vorrichtung zum Kühlen von heißen, planen Gegenständen
WO2019097711A1 (ja) * 2017-11-20 2019-05-23 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 金属板の冷却装置及び金属板の連続熱処理設備
RU184481U1 (ru) * 2018-01-10 2018-10-29 Федеральное государственное бюджетное учреждение науки "Удмуртский федеральный исследовательский центр Уральского отделения Российской академии наук", RU Щелевой спрейер для создания охлаждающей газожидкостной среды при термообработке осесимметричных заготовок
DE102018109579A1 (de) * 2018-04-20 2019-10-24 Schwartz Gmbh Temperiervorrichtung zur partiellen Kühlung eines Bauteils

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US3262688A (en) * 1965-06-03 1966-07-26 Midland Ross Corp Jet convection heat transfer
JPS57171627A (en) * 1981-04-17 1982-10-22 Mitsubishi Heavy Ind Ltd Gaseous jet cooler for steel strip
JPS57188624A (en) * 1981-05-15 1982-11-19 Mitsubishi Heavy Ind Ltd Heat treating device for band steel plate
JPS5946291A (ja) * 1982-09-10 1984-03-15 Toubishi Yakuhin Kogyo Kk セフアゾリン及びその無毒性塩の新規製造方法
IT1174829B (it) * 1983-09-08 1987-07-01 Italimpianti Dispositivo per il raffreddamento e la ricircolazione del gas dell atmosfera protettiva esistente in camera di raffreddamento di forni diricottura continua di nastri d acciaio
BR8504750A (pt) * 1984-11-14 1986-07-22 Nippon Steel Corp Aparelho de revestimento de tira para um forno de recozimento continuo
JPS61194119A (ja) * 1985-02-21 1986-08-28 Nippon Steel Corp 連続焼鈍設備における鋼帯冷却方法
DE4024605A1 (de) * 1990-08-02 1992-02-06 Wsp Ingenieurgesellschaft Fuer Vorrichtung zur abkuehlung von strangpressprofilen

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Title
Aluminium,Vol. 74, No 4, Avril 1998, p. 220, 221 *
Revue de Métallurgie-CIT, décembre 1992, p. 1093-1099 *

Also Published As

Publication number Publication date
EP0761829A1 (de) 1997-03-12
ATE197968T1 (de) 2000-12-15
FR2738577B1 (fr) 1998-03-13
DE69611129D1 (de) 2001-01-11
DE69611129T2 (de) 2001-06-21
KR970015759A (ko) 1997-04-28
AU6556996A (en) 1997-03-20
KR100441365B1 (ko) 2004-09-30
DE761829T1 (de) 1997-11-20
US5871686A (en) 1999-02-16
AU709914B2 (en) 1999-09-09
FR2738577A1 (fr) 1997-03-14

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