EP0916741B1 - Ofen mit einer schnellen Kühlung für Metallbänder - Google Patents

Ofen mit einer schnellen Kühlung für Metallbänder Download PDF

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Publication number
EP0916741B1
EP0916741B1 EP98402476A EP98402476A EP0916741B1 EP 0916741 B1 EP0916741 B1 EP 0916741B1 EP 98402476 A EP98402476 A EP 98402476A EP 98402476 A EP98402476 A EP 98402476A EP 0916741 B1 EP0916741 B1 EP 0916741B1
Authority
EP
European Patent Office
Prior art keywords
exchanger
gas
strip
duct
section
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
EP98402476A
Other languages
English (en)
French (fr)
Other versions
EP0916741A1 (de
Inventor
Gérard Jodet
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.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
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 Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP0916741A1 publication Critical patent/EP0916741A1/de
Application granted granted Critical
Publication of EP0916741B1 publication Critical patent/EP0916741B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
    • B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
    • 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
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/124—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
    • F27D2021/0007—Monitoring the pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
    • F27D2021/0057—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects
    • F27D2021/0092—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects against a jam in the transport line or a production interruption

Definitions

  • the present invention relates to improvements made to rapid cooling for strip materials and more particularly for metal bands.
  • These ovens can be part of, in particular, treatments such as for example heat treatments of metallic products in strip, in particular for galvanizing, annealing, production of tinplate, etc.
  • the recycled atmospheric gas is blown onto the metal strip in continuous circulation, after cooling in particular using gas / water heat exchangers, the composition of the atmosphere, and more particularly its high hydrogen content, making it possible to obtain very rapid cooling rates of the order of 100 ° C. per second.
  • the installations therefore comprise a circuit of recirculation ducts for the atmosphere gas N 2 , H 2 , one or more fans for ensuring the continuous circulation of this atmospheric gas in the recirculation ducts and gas / water exchangers.
  • the present invention solves the problems mentioned above by providing means allowing, on the one hand, to prevent the passage of atmospheric gas through of the exchanger (s), i.e. too rapid cooling of this gas atmosphere, which prevents a sudden depression in the oven in case of breakage of the strip and on the other hand to stop, in a very short time, that is to say less than five seconds, recirculation of atmospheric gas into the cooling chamber fast, during a wave break in a compensator or during a power outage power supply.
  • the actuators preferably tires, are triggered by a sensor detecting any variation of the belt tension.
  • the actuators are triggered via a sensor detecting any variation in pressure in the rapid cooling chamber.
  • means are furthermore designed and produced to so as to allow the rotation of the fan (s) to be stopped in a very short time, these means can be achieved by coupling the fan to a generator on which it is engaged either in the event of a wave break in a compensator, or in the event of power cut.
  • This oven or chamber cooling is generally part of an installation comprising a plurality of strip material processing stations, this installation being for example of the type described in EP-0 795 616 mentioned above.
  • the metal strip 12 circulates continuously, this strip coming in general of other treatment enclosures for example heat treatments, maintenance, annealing, etc.
  • Rapid cooling is obtained by spraying the strip 12, in continuous circulation, with a jet of gas of atmosphere N 2 , H 2 , containing, as explained above, a large proportion of hydrogen, greater than 15% and up to 50%.
  • This atmospheric gas is projected onto the lateral faces of the strip 12 by means of nozzles such as 14 supplied by sheaths such as 16 and it is taken up using sheaths such as 18 which open parallel to the plane of the strip 12 in the rapid cooling chamber 10.
  • the circulation of the atmospheric gas is obtained using a fan such as 20, driven by an electric motor 22, the blowing of the atmospheric gas being carried out by by means of a collecting sheath 24 supplying the sheaths 14 while the recovery of this atmosphere gas is carried out by means of the collecting sheaths 26, 26 ′ supplied by the sheaths 18.
  • the installation also comprises, in a known manner, exchangers 28, 28 ', of preferably gas / water type which are housed in enclosures designated in their together by the reference 32, respectively 32 ', on which the ducts 26, 26 'for atmospheric gas, in order to cool the latter, after circulation in the rapid cooling chamber 10 and before recovery by the fan 20 and blowing through ducts 24 and 16.
  • exchangers 28, 28 ' of preferably gas / water type which are housed in enclosures designated in their together by the reference 32, respectively 32 ', on which the ducts 26, 26 'for atmospheric gas, in order to cool the latter, after circulation in the rapid cooling chamber 10 and before recovery by the fan 20 and blowing through ducts 24 and 16.
  • the various sheaths 16, 18, 24, 26, 26 'in include compensators 30, produced in the form of a series of waves allowing the assembly sheaths to expand.
  • FIGS 3 and 4 schematically illustrate the improvements brought about by the invention.
  • FIGs 3 and 4 respectively represent in plan and in section, an enclosure, such as 32 or 32 '( Figures 1 and 2) receiving a heat exchanger such as 28, 28 'in Figures 1 and 2.
  • the direction of recirculation of the cooling gas has been represented by arrow F, this gas coming from the ducts 18 being sucked through the sheath 26, by the fan 20.
  • the passage to through the exchanger 28 is effected by the section of the enclosure designated by the reference A, this section being described below as the main passage section.
  • this main passage section A comprises, upstream of the exchanger 28, a register shown schematically at 34 and provision is made for derived passage sections, designated by the references B also provided with registers such as 36, 36 'through which the circulation flow of the cooling gas, so that it no longer passes through exchangers such as 28, 28 ', as will be explained below (arrows f).
  • the different registers 34, 36, 36 ' are controlled by actuators, preferably of the pneumatic type, such as 38, 38 ' having a very short response time, that is to say less than 5 seconds.
  • the triggering of these actuators allows either to interrupt the circulation of the cooling gas through the section of main passage A, i.e. through exchangers such as 28, 28 'and divert this circulation through branch sections B (register 34 closed and registers 36, 36 'open) or, to interrupt all circulation of the gas from cooling through passage sections A and B (registers 34, 36, 36 ' closed).
  • the first phenomenon that is to say a break in the strip
  • a tape tension sensor any variation of this voltage from a setpoint causing the tripping of actuators controlling the closing of the main passage section A and the opening of the branch passage sections B.
  • a pressure sensor positioned for example in the rapid cooling 10, any vacuum detection in this chamber immediately driving the actuators as mentioned above.
  • the latter can also be used to detect a wave break in a compensator 30 in order to immediately trigger the closing of the section of passage A, the derived sections B being kept closed as indicated in the table above.
  • any conventional means can be used to control the actuators 38 in power supply interruptions, including switches tripping by power failure or fault in order to cause a immediate closure of the main passage section A, the passage sections derivative B remaining closed.
  • the present invention it is also possible to provide means allowing to stop in a very short time, the rotation of the fan 20 for example by coupling to a generator to which it is engaged either in the event of a wave break a compensator 30, ie in the event of a power cut.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (7)

  1. Schnellkühlofen, der Teil einer Anlage sein kann, die verschiedene Behandlungsstationen, insbesondere zur Wärmebehandlung von Banderzeugnissen, umfaßt und durch welchen ein Metallband (12) kontinuierlich durchläuft, wobei die schnelle Abkühlung durch Blasen eines Gasstrahls aus einer Atmosphäre, die aus einem Stickstoff-Wasserstoff-Gemisch besteht, das einen Wasserstoffgehalt von über 15 % und vorzugsweise von etwa 50 % aufweist, auf das Band erhalten wird und die Rückführung des Atmosphärengases mittels eines Kreislaufs aus Rezirkulationsleitungen (16, 18, 26, 26', 24) sichergestellt wird, der mindestens ein Gebläse (20) sowie mindestens einen Gas/Wasser-Austauscher (28, 28') umfaßt, wobei die verschiedenen Rohrleitungen Ausgleichsrohrverbindungen (30) enthalten, die in Form eines Wellrohrs ausgeführt sind, das die Dehnung der Einheit aus Rohrleitungen erlaubt, und der Ofen (10) dadurch gekennzeichnet ist, daß der Zwischenraum (32, 32'), in welchem der/die Austauscher (28, 28') angeordnet ist/sind und in den die Rezirkulationsleitungen (16, 18, 26, 26', 24) für das Atmosphärengas münden,
    einen Hauptdurchgangsquerschnitt (A), durch welchen die Strömung des Kühlgases durch diese Austauscher vonstatten geht, wobei der Durchgangsquerschnitt (A) in Strömungsrichtung hinter dem/den Austauscher/n mit einem Register (34) versehen ist,
    untergeordnete Durchgangsquerschnitte (B), welche es ermöglichen, im Falle des Verschließens des Hauptdurchgangsquerschnitts (A) den Kühlgasstrom umzuleiten, damit dieser nicht durch den/die Austauscher geht, wobei die untergeordneten Durchgangsquerschnitte mit Registern (36, 36') versehen sind, und
    Aktoren (38, 38') mit einer sehr kurzen Reaktionszeit, d.h. von weniger als fünf Sekunden, die über Mittel zur Detektion eines Risses im Band, eines Risses in einer Welle einer Ausgleichsrohrverbindung und einer Unterbrechung der elektrischen Stromversorgung ausgelöst werden,
    umfaßt.
  2. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß die Aktoren (38, 38'), welche vorzugsweise pneumatisch arbeiten, über einen Sensor ausgelöst werden, der jede Veränderung der Spannung des Bandes detektiert.
  3. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß die Aktoren (38, 38') über einen Sensor ausgelöst werden, der jede Veränderung des Druckes in der Schnellkühlkammer (10) detektiert.
  4. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß Mittel zum Auslösen der Aktoren (38), welche das Register (34) steuern, das am Hauptdurchgangsquerschnitt (A) vorgesehen ist, im Falle einer Unterbrechung der elektrischen Stromversorgung derart vorgesehen sind, daß die sofortige Schließung des Hauptdurchgangsquerschnitts bewirkt wird, wobei die untergeordneten Durchgangsquerschnitte (B) geschlossen bleiben.
  5. Ofen nach Anspruch 4, dadurch gekennzeichnet, daß die Mittel zum Auslösen der Aktoren (38) im Falle einer Unterbrechung der elektrischen Stromversorgung in Form von Umschaltern mit Auslösung durch Unterbrechung oder Störung des elektrischen Stroms ausgeführt sind.
  6. Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Mittel vorgesehen sind, welche es ermöglichen, die Umdrehung des Gebläses (20) innerhalb eines sehr kurzen Zeitraums anzuhalten.
  7. Ofen nach Anspruch 6, dadurch gekennzeichnet, daß die Mittel, welche es ermöglichen, die Umdrehung des Gebläses (20) innerhalb eines sehr kurzen Zeitraums anzuhalten, darin bestehen, es mit einem Generator zu koppeln, an welchen es entweder im Falle eines Risses in einer Welle einer Ausgleichsrohrverbindung (30) oder im Falle einer Unterbrechung der elektrischen Stromversorgung einkuppelt.
EP98402476A 1997-10-15 1998-10-06 Ofen mit einer schnellen Kühlung für Metallbänder Expired - Lifetime EP0916741B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712906A FR2769695B1 (fr) 1997-10-15 1997-10-15 Perfectionnements apportes aux fours a refroidissement rapide pour bandes metalliques
FR9712906 1997-10-15

Publications (2)

Publication Number Publication Date
EP0916741A1 EP0916741A1 (de) 1999-05-19
EP0916741B1 true EP0916741B1 (de) 2002-01-16

Family

ID=9512260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98402476A Expired - Lifetime EP0916741B1 (de) 1997-10-15 1998-10-06 Ofen mit einer schnellen Kühlung für Metallbänder

Country Status (9)

Country Link
US (1) US6092389A (de)
EP (1) EP0916741B1 (de)
JP (1) JP3323820B2 (de)
KR (1) KR100581983B1 (de)
CN (1) CN1088113C (de)
AT (1) ATE212071T1 (de)
DE (2) DE69803157T2 (de)
ES (1) ES2131493T3 (de)
FR (1) FR2769695B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7308669B2 (en) * 2005-05-18 2007-12-11 International Business Machines Corporation Use of redundant routes to increase the yield and reliability of a VLSI layout
CN103074480A (zh) * 2011-10-26 2013-05-01 苏州新长光热能科技有限公司 一种热处理炉用可控内循环冷却系统
CN110184449A (zh) * 2019-06-24 2019-08-30 湖北钱潮精密件有限公司 热处理回火炉落料口双开关控制装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT946124B (it) * 1970-12-01 1973-05-21 Nippon Steel Corp Apparecchio per il trattamento continuo di lamiera di acciaio
US4398700A (en) * 1982-09-29 1983-08-16 Midland-Ross Corporation Annealing furnace with an improved cooling section
EP0181830B1 (de) * 1984-11-08 1991-06-12 Mitsubishi Jukogyo Kabushiki Kaisha Verfahren und Vorrichtung zum Erwärmen eines Metallbandes in einem Durchlaufglühofen
BR8504750A (pt) * 1984-11-14 1986-07-22 Nippon Steel Corp Aparelho de revestimento de tira para um forno de recozimento continuo
US5137586A (en) * 1991-01-02 1992-08-11 Klink James H Method for continuous annealing of metal strips
JP5339242B2 (ja) 2008-03-12 2013-11-13 株式会社リコー 二光子吸収材料とその用途
JP5677603B2 (ja) 2012-11-26 2015-02-25 東京エレクトロン株式会社 基板洗浄システム、基板洗浄方法および記憶媒体

Also Published As

Publication number Publication date
ES2131493T3 (es) 2002-05-01
KR100581983B1 (ko) 2006-09-27
ATE212071T1 (de) 2002-02-15
DE916741T1 (de) 1999-11-04
DE69803157T2 (de) 2002-08-14
US6092389A (en) 2000-07-25
FR2769695B1 (fr) 1999-12-31
FR2769695A1 (fr) 1999-04-16
ES2131493T1 (es) 1999-08-01
JP3323820B2 (ja) 2002-09-09
CN1088113C (zh) 2002-07-24
JPH11193422A (ja) 1999-07-21
CN1216323A (zh) 1999-05-12
KR19990037035A (ko) 1999-05-25
EP0916741A1 (de) 1999-05-19
DE69803157D1 (de) 2002-02-21

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