EP0107991A1 - Apparatus and method for the adjustment of the heating capacity of a heating plant for continuously moving metallic strip - Google Patents

Apparatus and method for the adjustment of the heating capacity of a heating plant for continuously moving metallic strip Download PDF

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Publication number
EP0107991A1
EP0107991A1 EP83401948A EP83401948A EP0107991A1 EP 0107991 A1 EP0107991 A1 EP 0107991A1 EP 83401948 A EP83401948 A EP 83401948A EP 83401948 A EP83401948 A EP 83401948A EP 0107991 A1 EP0107991 A1 EP 0107991A1
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EP
European Patent Office
Prior art keywords
heating
adjustment
continuously moving
metallic strip
capacity
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.)
Withdrawn
Application number
EP83401948A
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German (de)
French (fr)
Inventor
Daniel Butruille
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.)
Fabrique de Fer de Maubeuge
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Fabrique de Fer de Maubeuge
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Publication date
Application filed by Fabrique de Fer de Maubeuge filed Critical Fabrique de Fer de Maubeuge
Publication of EP0107991A1 publication Critical patent/EP0107991A1/en
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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
    • 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
    • C21D9/60—Continuous furnaces for strip or wire with induction heating
    • 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
    • C21D1/34—Methods of heating
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating

Definitions

  • the present invention relates to the heating of a steel strip intended to be galvanized.
  • Galvanizing requires raising the temperature of the steel strip at least to that of the zinc alloy bath in which it passes. This elevation is conventionally provided by an installation of ovens in which the strip passes. The capacity of these ovens is one of the essential parameters influencing the speed of circulation of the belt. Thus the speed of a thick strip will be lower than that of a thin strip.
  • the penetration of heat into the heart of a thick strip is difficult and that there is always a decreasing temperature gradient from the periphery to the center of the room.
  • the operation of a heat treatment oven is not always very simple and that the modifications to its operating regime can bring about risks in the quality of the treatment desired.
  • the invention intends to provide an improvement to this type of installation which makes it possible to facilitate the changes in regime of a heating installation for a continuously moving product and the adaptation of its operation to different thicknesses of product without having to influence on speed. This results in an absence of repercussions on the entire galvanizing line, which removes all the adjustments resulting from a change in speed.
  • the improvement according to the invention is very easily adaptable to an already existing installation.
  • the heating device essentially comprises an induction heating means in addition to at least one other gas or electric heating means which may or may not have a controlled atmosphere. This device allows a simple adjustment of the heating capacity.
  • an induction heating device 3 will have been arranged which allows the temperature of the sheet to be raised quickly and to the core. It is preferable to carry out a preheating not exceeding 120 to 150 ° C. with this device 3 so as to avoid oxidation of the strip. This preheating can thus be carried out in a free atmosphere.
  • the heating obtained is uniform throughout the thickness of the strip.
  • the heating speed is also very fast and its performance is excellent with modern equipment currently on the market.
  • this heating device is very flexible and gives the entire installation a much greater maneuverability. It is thus that one can easily change the regime for the entire heating installation and that one will be able to keep substantially identical running speeds whatever the thicknesses of the sheets treated since by induction it is easy to heat the thick sheets quickly and to the core.
  • the invention finds an interesting application in the field of galvanization. It is not limited to the description which has just been given, but on the contrary covers all the variants which could be made to it without departing from its scope or its spirit.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating With Molten Metal (AREA)

Abstract

The invention relates to an apparatus for heating a continuously moving metallurgical product (1) especially upstream of a tank of zinc alloy in a galvanising line which comprises a means of inductive heating (3) supplementing an already existing heating means (2). The adjustment of the heating capacity is produced by actuating the said inductive heating means (3). Application to sheet metal metallurgy. <IMAGE>

Description

La présente invention concerne le chauffage d'une bande d'acier destinée à être galvanisée.The present invention relates to the heating of a steel strip intended to be galvanized.

La galvanisation nécessite d'élever la température de la bande d'acier au moins au niveau de celle du bain d'alliage de zinc dans laquelle elle passe. Cette élévation est assurée classiquement par une installation de fours dans lesquels défile la bande. La capacité de ces fours constitue l'un des paramètres essentiels influençant la vitesse de circulation de la bande. Ainsi la vitesse d'une bande épaisse sera plus petite que celle d'une bande mince. En plus, il faut noter que la pénétration de la chaleur au coeur d'une bande épaisse est difficile et qu'il existe toujours un gradient de température décroissant de la périphérie au centre de la pièce. Par ailleurs on sait que la conduite d'un four de traitement thermique n'est pas toujours très simple et que les modifications de son régime de fonctionnement peuvent apporter des aléas dans la qualité du traitement souhaité.Galvanizing requires raising the temperature of the steel strip at least to that of the zinc alloy bath in which it passes. This elevation is conventionally provided by an installation of ovens in which the strip passes. The capacity of these ovens is one of the essential parameters influencing the speed of circulation of the belt. Thus the speed of a thick strip will be lower than that of a thin strip. In addition, it should be noted that the penetration of heat into the heart of a thick strip is difficult and that there is always a decreasing temperature gradient from the periphery to the center of the room. Furthermore, it is known that the operation of a heat treatment oven is not always very simple and that the modifications to its operating regime can bring about risks in the quality of the treatment desired.

L'invention entend apporter un perfectionnement à ce type d'installation qui permet de faciliter les changements de régime d'une installation de chauffage d'un produit défilant en continu et l'adaptation de son fonctionnement à différentes épaisseurs de produit sans avoir d'influence sur la vitesse. Il s'ensuit une absence de répercussion sur la totalité de la ligne de galvanisation ce qui supprime tous les réglages résultant d'un changement d'allure. Le perfectionnement selon l'invention est très facilement adaptable sur une installation déjà existante.The invention intends to provide an improvement to this type of installation which makes it possible to facilitate the changes in regime of a heating installation for a continuously moving product and the adaptation of its operation to different thicknesses of product without having to influence on speed. This results in an absence of repercussions on the entire galvanizing line, which removes all the adjustments resulting from a change in speed. The improvement according to the invention is very easily adaptable to an already existing installation.

Le dispositif de chauffage selon l'invention comporte essentiellement un moyen de chauffage par induction en complément d'au moins un autre moyen de chauffage à gaz ou électrique comportant ou non une atmosphère contrôlée. Ce dispositif permet un réglage simple de la capacité de chauffe.The heating device according to the invention essentially comprises an induction heating means in addition to at least one other gas or electric heating means which may or may not have a controlled atmosphere. This device allows a simple adjustment of the heating capacity.

L'invention sera mieux comprise au cours de la description donnée ci-après à titre d'exemple purement indicatif et non limitatif qui permettra d'en dégager les avantages et les caractéristiques secondaires.The invention will be better understood during the description given below by way of purely indicative and nonlimiting example which will make it possible to identify the advantages and the secondary characteristics thereof.

Il sera fait référence au dessin annexé qui représente de manièa très schématique les dispositions de l'invention.Reference will be made to the accompanying drawing which very schematically shows the provisions of the invention.

En se reportant à cette figure, on a symbolisé par le rouleau 1 une bobine de bande métallique que l'on déroule en direction d'une installation de chauffage 2, après lui avoir fait subir un certain nombre d'opérations dans des postes de travail non représentés (tel que du planage, liaison bout à bout de deux bobines consécutives...). Selon l'invention avant l'introduction de la bande dans la batterie de four, on aura disposé un dispositif 3 de chauffage par induction qui permet d'élever rapidement et jusqu'à coeur la température de la tôle. On préférera réaliser une préchauffe ne dépassant pas 120 à 150°C avec ce dispositif 3 de manière à éviter une oxydation de la bande. Cette préchauffe peut ainsi s'effectuer en atmosphère libre.Referring to this figure, there has been symbolized by the roller 1 a coil of metal strip which is unwound in the direction of a heating installation 2, after having subjected it to a certain number of operations in work stations. not shown (such as leveling, end-to-end connection of two consecutive coils ...). According to the invention before the introduction of the strip into the oven battery, an induction heating device 3 will have been arranged which allows the temperature of the sheet to be raised quickly and to the core. It is preferable to carry out a preheating not exceeding 120 to 150 ° C. with this device 3 so as to avoid oxidation of the strip. This preheating can thus be carried out in a free atmosphere.

L'intérêt d'une disposition telle que décrite réside dans le fait qu'un dispositif par induction est à faible encombrement.The advantage of an arrangement as described lies in the fact that an induction device is compact.

On peut ainsi le mettre en place sur une installation existante avant l'entrée dans les fours. En outre le chauffage obtenu est uniforme dans toute l'épaisseur de la bande. La vitesse de chauffage est de plus très rapide et son rendement est excellent avec le matériel moderne actuellement sur le marché.It can thus be installed on an existing installation before entering the ovens. In addition, the heating obtained is uniform throughout the thickness of the strip. The heating speed is also very fast and its performance is excellent with modern equipment currently on the market.

Enfin la conduite de ce dispositif de chauffage est très souple et donne à la totalité de l'installation une maniabilité beaucoup plus grande. C'est ainsi que l'on peut facilement changer de régime pour l'ensemble de l'installation de chauffage et que l'on pourra conserver des vitesses de défilement sensiblement identiques quelles que soient les épaisseurs des tôles traitées puisque par induction il est aisé de chauffer rapidement et jusqu'à coeur les tôles épaisses.Finally, the conduct of this heating device is very flexible and gives the entire installation a much greater maneuverability. It is thus that one can easily change the regime for the entire heating installation and that one will be able to keep substantially identical running speeds whatever the thicknesses of the sheets treated since by induction it is easy to heat the thick sheets quickly and to the core.

L'invention trouve une application intéressante dans le domaine de la galvanisation. Elle n'est pas limitée à la description qui vient d'en être donnée mais couvre au contraire toutes les variantes qui pourraient lui être apportées sans sortir de son cadre ni de son esprit.The invention finds an interesting application in the field of galvanization. It is not limited to the description which has just been given, but on the contrary covers all the variants which could be made to it without departing from its scope or its spirit.

Claims (2)

1. Dispositif de chauffage d'un produit métallique (1) défilant en continu notamment en amont d'un bac d'alliage de zinc sur une ligne de galvanisation caractérisé en ce qu'il comporte au moins un moyen de chauffage par induction (3) en complément d'au moins un autre moyen de chauffage (2).1. Heating device for a metal product (1) continuously scrolling in particular upstream of a zinc alloy tank on a galvanizing line, characterized in that it comprises at least one means of induction heating (3 ) in addition to at least one other heating means (2). 2. Procédé de réglage de la capacité d'un dispositif de chauffage (2) d'un produit métallique (1) défilant en continu, caractérisé en ce que l'on adjoint audit dispositif (2) un moyen de chauffage par induction (3) formant source de chaleur complémentaire et en ce que l'on agit sur ce moyen complémentaire.2. Method for adjusting the capacity of a heating device (2) of a metal product (1) continuously scrolling, characterized in that an induction heating means (3) is added to said device (2) ) forming a complementary heat source and in that one acts on this complementary means.
EP83401948A 1982-10-06 1983-10-05 Apparatus and method for the adjustment of the heating capacity of a heating plant for continuously moving metallic strip Withdrawn EP0107991A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216756 1982-10-06
FR8216756A FR2534361B1 (en) 1982-10-06 1982-10-06 DEVICE AND METHOD FOR ADJUSTING THE HEATING CAPACITY OF A THERMAL INSTALLATION FOR CONTINUOUSLY MOVING METAL BAND

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EP0107991A1 true EP0107991A1 (en) 1984-05-09

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576323A1 (en) * 1985-01-22 1986-07-25 Tecnor Sa PROCESS FOR PROCESSING CONDUCTIVE PROFILES, PARTICULARLY METALLIC, INSTALLATION FOR ITS IMPLEMENTATION AND TREATED PROFILES SO OBTAINED
WO1987002067A1 (en) * 1985-10-04 1987-04-09 Berg Ag Process for continuous patenting of wire and device for carrying out the process
FR2656553A1 (en) * 1990-01-03 1991-07-05 Stein Heurtey Thermal treatment installation with rolling of thin slabs produced by continuous casting
FR2661426A1 (en) * 1990-04-27 1991-10-31 Maubeuge Fer Process for continuous dip galvanising
EP0561667A1 (en) * 1992-03-19 1993-09-22 Stein Heurtey Process for heat treating metallic strip
EP0688884A1 (en) * 1994-06-22 1995-12-27 Fabrique De Fer De Maubeuge Process and apparatus for annealing of a metallic strip and improvements to hot continuous galvanic lines using the same
EP1457580A1 (en) * 2003-03-12 2004-09-15 STEIN HEURTEY, Société Anonyme: Method for the control of oxidation of sheets before hot dip galvanizing and galvanizing line
EP2028281A1 (en) * 2007-08-20 2009-02-25 Muhr und Bender KG Heat treatment of flexibly rolled sheet
WO2012163332A1 (en) * 2011-05-27 2012-12-06 Thermprotec Gmbh Method and device for producing oxidized metal strips

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE892139C (en) * 1944-03-24 1953-10-05 Westfaelische Union Ag Method and device for remuneration of wires, bands or the like.
US3329591A (en) * 1963-09-21 1967-07-04 Muller Hans-Heinz Method and apparatus for heating metal strip
FR1534778A (en) * 1966-06-07 1968-08-02 Metallurg D Esperancelongdoz S Continuous galvanizing process and installation
US3587268A (en) * 1968-09-17 1971-06-28 Francis H Bricmont Workpiece temperature equalization in rolling of steel
FR2385801A1 (en) * 1977-04-02 1978-10-27 Aeg Elotherm Gmbh Continuous heat treatment of large dia. steel pipes - using two induction heating coils sepd. by fuel fired furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE892139C (en) * 1944-03-24 1953-10-05 Westfaelische Union Ag Method and device for remuneration of wires, bands or the like.
US3329591A (en) * 1963-09-21 1967-07-04 Muller Hans-Heinz Method and apparatus for heating metal strip
FR1534778A (en) * 1966-06-07 1968-08-02 Metallurg D Esperancelongdoz S Continuous galvanizing process and installation
US3587268A (en) * 1968-09-17 1971-06-28 Francis H Bricmont Workpiece temperature equalization in rolling of steel
FR2385801A1 (en) * 1977-04-02 1978-10-27 Aeg Elotherm Gmbh Continuous heat treatment of large dia. steel pipes - using two induction heating coils sepd. by fuel fired furnace

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576323A1 (en) * 1985-01-22 1986-07-25 Tecnor Sa PROCESS FOR PROCESSING CONDUCTIVE PROFILES, PARTICULARLY METALLIC, INSTALLATION FOR ITS IMPLEMENTATION AND TREATED PROFILES SO OBTAINED
WO1987002067A1 (en) * 1985-10-04 1987-04-09 Berg Ag Process for continuous patenting of wire and device for carrying out the process
FR2656553A1 (en) * 1990-01-03 1991-07-05 Stein Heurtey Thermal treatment installation with rolling of thin slabs produced by continuous casting
FR2661426A1 (en) * 1990-04-27 1991-10-31 Maubeuge Fer Process for continuous dip galvanising
US5472528A (en) * 1992-03-19 1995-12-05 Stein Heurtey Heat-treatment method for metal strips
FR2688802A1 (en) * 1992-03-19 1993-09-24 Stein Heurtey PROCESS FOR HEAT TREATMENT OF METAL BANDS
EP0561667A1 (en) * 1992-03-19 1993-09-22 Stein Heurtey Process for heat treating metallic strip
EP0688884A1 (en) * 1994-06-22 1995-12-27 Fabrique De Fer De Maubeuge Process and apparatus for annealing of a metallic strip and improvements to hot continuous galvanic lines using the same
FR2721620A1 (en) * 1994-06-22 1995-12-29 Maubeuge Fer Method and device for annealing a metal strip and improving continuous hot-dip galvanizing lines using it.
EP1457580A1 (en) * 2003-03-12 2004-09-15 STEIN HEURTEY, Société Anonyme: Method for the control of oxidation of sheets before hot dip galvanizing and galvanizing line
FR2852330A1 (en) * 2003-03-12 2004-09-17 Stein Heurtey METHOD OF CONTROLLED OXIDATION OF STRIPS BEFORE CONTINUOUS GALVANIZATION AND GALVANIZATION LINE
EP2028281A1 (en) * 2007-08-20 2009-02-25 Muhr und Bender KG Heat treatment of flexibly rolled sheet
US8361253B2 (en) 2007-08-20 2013-01-29 Muhr Und Bender Kg Heat treatment of flexibly rolled strip
WO2012163332A1 (en) * 2011-05-27 2012-12-06 Thermprotec Gmbh Method and device for producing oxidized metal strips

Also Published As

Publication number Publication date
FR2534361A1 (en) 1984-04-13
FR2534361B1 (en) 1988-02-12

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Inventor name: BUTRUILLE, DANIEL