EP0157057A1 - Method of consecutively galvanizing a metallic wire with two different coatings - Google Patents
Method of consecutively galvanizing a metallic wire with two different coatings Download PDFInfo
- Publication number
- EP0157057A1 EP0157057A1 EP84401547A EP84401547A EP0157057A1 EP 0157057 A1 EP0157057 A1 EP 0157057A1 EP 84401547 A EP84401547 A EP 84401547A EP 84401547 A EP84401547 A EP 84401547A EP 0157057 A1 EP0157057 A1 EP 0157057A1
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- EP
- European Patent Office
- Prior art keywords
- tank
- bath
- removable
- fixed
- galvanizing
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000000576 coating method Methods 0.000 title abstract description 7
- 238000005246 galvanizing Methods 0.000 title description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 19
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000011888 foil Substances 0.000 claims description 2
- 239000003999 initiator Substances 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 6
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- 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
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
-
- 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
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- 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
- C23C2/003—Apparatus
- C23C2/0036—Crucibles
-
- 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
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/50—Controlling or regulating the coating processes
Definitions
- the coating of a metal strip with a zinc alloy is carried out today by means of an installation called a galvanizing line along which the strip passes and undergoes various treatments.
- a galvanizing line along which the strip passes and undergoes various treatments.
- a cleaning station there is successively a cleaning station, a preheating station with or without atmosphere control, a so-called laboratory station where generally the heating of the strip continues in a very reducing atmosphere, possibly a cooling station to finally arrive in a bath of molten zinc alloy.
- the strip On leaving the bath, the strip is wrung out and cooled to be either wound up or conducted through subsequent treatment stations (such as, for example, heat treatment or surface treatment stations, etc.).
- the invention intends to propose another solution for the production, on the same galvanizing line, of two different products, that is to say coated with different alloys, successively; by means of a galvanizing process.
- the arrangements of the invention advantageously allow a change of bath with a minimum of manipulation of molten metal, maximum security in particular for the temperature maintenance device and finally in a relatively short time, that is to say without incidence appreciable on the production capacity and therefore on the cost price of the finished product.
- the subject of the invention is a method for producing consecutively on a single production line at least two metal foil products coated with different metal alloys, the production line comprising in particular a fixed tank of molten alloy in which the metallic sheet scrolls.
- this process consists, to go from the first to the second product, to place in the bath of said fixed tank, a removable tank of lower volume containing one of the above-mentioned alloys different from that contained in the fixed tank, to maintain the bath temperature of the removable tank by regulating the bath temperature of the fixed tank and to scrolling said metal sheet in the bath of the removable tank, and, to go from the second to the first product, removing said removable tank, the metal sheet then scrolling in the fixed tank.
- One of the phases of the process resides in the fact that, prior to the installation of the removable tank, the stationary tank is partially emptied then, after this installation, the two baths are completed to an identical level.
- the means for guiding the metal strip 3 in the bath 1 during its circulation in the direction A consist of a return roller 4 immersed in this bath by which the strip passes from its plunging path to its substantially vertical extraction path. This guidance is supplemented by a descaling roller 5.
- the strip 3 is brought into the bath through a sheath 6 for confining the atmosphere which has an end 6a plunging into the bath to ensure the tightness of the internal volume of the sheath relative to the outside.
- a wringing device 7 which may be mechanical by rollers or by spraying gas.
- the roller 4 (and the roller 5) is carried by an arm 4a (5a for the roller 5) which is detachably fixed to a fixed structure of the line extending above the tank 2 and which also carries the sheath 6.
- the installation of the removable tank 8 requires clearing the access to the fixed tank 2.
- the sheath 6 one can provide either its retraction by an appropriate articulation on the fixed structure, or a telescopic construction, or finally a lower part carrying the end 6a (or shoe) easily removable.
- the production of a second product can be carried out on the same line. It is then advisable, after the latter has been stopped, to disassemble or retract the members 4, 5, 6, 7 and / or 11 and, by means of a lifting bridge, to approach the tank 8 of the fixed tank 2 that we will have partially drained of its content.
- the tank 8 will preferably contain a start of the bath 10 of a second alloy which will have been created for example by means of an oven or by means of an auxiliary heating which it may include. ingot ingots is faster when they are in contact with an already created bath.
- the operation consisting in the commissioning of the auxiliary tank is relatively quick so that the downtime of the galvanizing line is not prohibitive as regards its impact on the production cost price.
- the method according to the invention allows the passage without any danger from one alloy to another since these are contained in two different tanks without any possible solution of a component of the first bath in the second.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Chemical Treatment Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
L'invention consiste en un procédé pour revêtir une bande métallique d'au moins deux alliages de couverture différents consécutivement sur une seule ligne de production, selon lequel pour passer d'un premier produit au second, on dispose dans la cuve principale (2) une cuve secondaire (8) contenant le second alliage. Application à la production en continu des tôles métalliques revêtues.The invention consists of a process for coating a metal strip with at least two different covering alloys consecutively on a single production line, according to which to move from a first product to the second, one has in the main tank (2) a secondary tank (8) containing the second alloy. Application to the continuous production of coated metal sheets.
Description
Le revêtement d'une bande métallique par un alliage de zinc s'effectue aujourd'hui au moyen d'une installation appelée ligne de galvanisation le long de laquelle la bande défile et subit divers traitements. C'est ainsi qu'après un poste de déroulage en tête de ligne, on trouve successivement un poste de nettoyage, un poste de préchauffage avec ou sans contrôle d'atmosphère, un poste dit laboratoire où généralement le chauffage de la bande se poursuit dans une atmosphère très réductrice, éventuellement un poste de refroidissement pour finalement arriver dans un bain d'alliage de zinc fondu. Au sortir du bain, la bande est essorée et refroidie pour être soit enroulée soit conduite au travers de postes de traitements ultérieurs (tels par exemple que des postes de traitement thermique ou de traitement de surface...).The coating of a metal strip with a zinc alloy is carried out today by means of an installation called a galvanizing line along which the strip passes and undergoes various treatments. Thus, after an unwinding station at the head of the line, there is successively a cleaning station, a preheating station with or without atmosphere control, a so-called laboratory station where generally the heating of the strip continues in a very reducing atmosphere, possibly a cooling station to finally arrive in a bath of molten zinc alloy. On leaving the bath, the strip is wrung out and cooled to be either wound up or conducted through subsequent treatment stations (such as, for example, heat treatment or surface treatment stations, etc.).
On peut se rendre compte qu'une telle ligne de galvanisation est une installation complexe qui est destinée à de fortes productions continues d'un produit unique. Or,il peut être avantageux de pouvoir fabriquer des produits dont les revêtements sont différents.Sur une même ligne de galvanisation cette modification nécessite, outre le réglage de tous les postes de traitement en amont du bain d'alliage, la vidange de la cuve contenant ce bain, qui est une opération délicate et longue, donc coûteuse, compte tenu notamment des moyens de chauffage mis en oeuvre (induction) qui ne fonctionnent correctement qu'en présence d'un bain dans la cuve. Au surplus, la cuve correctement vidée doit subir un nettoyage extrêmement poussé, dans certains cas, pour pouvoir ensuite recevoir le nouvel alliage de revêtement qui peut ne pas tolérer, même en très petite concentration,un ou plusieurs des éléments constituant l'alliage précédent.We can see that such a galvanizing line is a complex installation which is intended for high continuous production of a single product. However, it may be advantageous to be able to manufacture products with different coatings. On the same galvanizing line, this modification requires, in addition to the adjustment of all the treatment stations upstream of the alloy bath, the emptying of the tank containing this bath, which is a delicate and long operation, therefore expensive, taking into account in particular the heating means used (induction) which only function correctly in the presence of a bath in the tank. In addition, the correctly emptied tank must undergo an extremely thorough cleaning, in certain cases, in order to then be able to receive the new coating alloy which may not tolerate, even in very small concentration, one or more of the elements constituting the previous alloy.
La fabrication de deux produits différents a donc souvent nécessité l'emploi de deux lignes de galvanisation, spécialisées pour chacune d'elles dans l'un ou l'autre des produits. Il n'est pas besoin d'autre explication pour comprendre que cette solution implique un investissement considérable qui ne peut se justifier que par un amortissement sur de très fortes productions. Il a été cependant réalisé sur une même ligne deux cuves pouvant être alternativement mises en service par translation transversale au sens de défilement de la bande métallique. Cette solution présente encore l'inconvénient d'immobiliser de grandes quantités de métal fondu et d'entretenir un bain à l'état fondu hors service pendant l'utilisation de l'autre avec la consommation d'énergie que cela représente.The manufacture of two different products therefore often required the use of two galvanizing lines, specialized for each of them in one or other of the products. No further explanation is needed to understand that this solution involves a considerable investment which can only be justified by depreciation on very large productions. However, two tanks were produced on the same line which could be alternately put into service by transverse translation in the direction of travel of the metal strip. This solution also has the drawback of immobilizing large quantities of molten metal and of maintaining a bath in the molten state out of service during the use of the other with the energy consumption that this represents.
L'invention entend proposer une autre solution pour la production, sur une même ligne de galvanisation, de deux produits différents, c'est-à-dire revêtus d'alliages différents, de manière successive; par le moyen d'un procédé de galvanisation. Les dispositions de l'invention permettent avantageusement un changement de bain avec un-minimum de manipulation de métal fondu, un maximum de sécurité notamment pour le dispositif de maintien en température etjenfin dans un temps relativement réduit,c'est-à-dire sans incidence appréciable sur la capacité de production et donc sur le coût de revient du produit fini.The invention intends to propose another solution for the production, on the same galvanizing line, of two different products, that is to say coated with different alloys, successively; by means of a galvanizing process. The arrangements of the invention advantageously allow a change of bath with a minimum of manipulation of molten metal, maximum security in particular for the temperature maintenance device and finally in a relatively short time, that is to say without incidence appreciable on the production capacity and therefore on the cost price of the finished product.
A cet effet l'invention a pour objet un procédé pour produire consécutivement sur une ligne unique de production au moins deux produits en feuille métallique revêtus d'alliages métalliques différents, la ligne de production comportant notamment une cuve fixe d'alliage fondu dans laquelle la feuille métallique défile.To this end, the subject of the invention is a method for producing consecutively on a single production line at least two metal foil products coated with different metal alloys, the production line comprising in particular a fixed tank of molten alloy in which the metallic sheet scrolls.
Selon l'une des caractéristiques principales de l'invention, ce procédé consiste, pour passer du premier au second produit, à placer dans le bain de ladite cuve fixe, une cuve amovible de volume inférieur contenant l'un des alliages susdits différent de celui contenu dans la cuve fixe, à maintenir en température le bain de la cuve amovible par régulation de la température du bain de la cuve fixe et à faire défiler ladite feuille métallique dans le bain de la cuve amovible, et, pour passer du second au premier produit, à retirer ladite cuve amovible, la feuille métallique défilant alors dans la cuve fixe.According to one of the main characteristics of the invention, this process consists, to go from the first to the second product, to place in the bath of said fixed tank, a removable tank of lower volume containing one of the above-mentioned alloys different from that contained in the fixed tank, to maintain the bath temperature of the removable tank by regulating the bath temperature of the fixed tank and to scrolling said metal sheet in the bath of the removable tank, and, to go from the second to the first product, removing said removable tank, the metal sheet then scrolling in the fixed tank.
Il est avantageux, dans ce procédé de constituer au moins une amorce de bain dans la cuve amovible avant la mise en place de cette cuve dans le bain de la cuve fixe.It is advantageous in this method to constitute at least one bath initiator in the removable tank before the establishment of this tank in the bath of the fixed tank.
Une des phases du procédé réside dans le fait que, préalablement à la mise en place de la cuve amovible, on vide partiellement la cuve fixe puis, après cette mise en place,on complète les deux bains jusqu'à un niveau identique.One of the phases of the process resides in the fact that, prior to the installation of the removable tank, the stationary tank is partially emptied then, after this installation, the two baths are completed to an identical level.
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 aux dessins annexés dans lesquels :
- - la figure 1 est une vue schématique en coupe d'une installation connue de galvanisation dans la zone du bain d'alliage fondu;
- - la figure 2 illustre par une même coupe schématique une installation pour mettre en oeuvre le procédé selon l'invention.
- - Figure 1 is a schematic sectional view of a known installation for galvanizing in the area of the molten alloy bath;
- - Figure 2 illustrates in the same schematic section an installation for implementing the method according to the invention.
En se reportant tout d'abord à la figure 1, on voit une portion de ligne de galvanisation au niveau du bain d'alliage de zinc fondu. Ce bain 1 est contenu dans une cuve fixe 2 qui possède des éléments d'apport de chaleur connus en eux-mêmes et non représentés tels que des inducteurs.Referring first to Figure 1, we see a portion of the galvanizing line at the bath of molten zinc alloy. This bath 1 is contained in a
Les moyens pour guider la bande 3 métallique dans le bain 1 lors de sa circulation dans le sens A sont constitués par un rouleau de renvoi 4 immergé dans ce bain par lequel la bande passe de son trajet plongeant à son trajet d'extraction sensiblement vertical. Ce guidage est complété par un rouleau décambreur 5.The means for guiding the
Ainsi, de manière connue, la bande 3 est amenée dans le bain au travers d'une gaine 6 de confinement de L'atmosphère qui possède une extrémité 6a plonqeant dans le bain pour assurer l'étanchérté du volume interne de la gaine par rapport à l'extérieur. A la sortie du bain, au-delà du rouleau 4 la bande pénètre dans un dispositif d'essorage 7 qui pourra être mécanique par rouleaux ou par projection de gaz. On notera que le rouleau 4 (et le rouleau 5) est porté par un bras 4a (5a pour le rouleau 5) qui est fixé de manière démontable à une structure fixe de la ligne s'étendant au-dessus de la cuve 2 et qui porte également la gaine 6.Thus, in a known manner, the
Sur la figure 2 on retrouve une structure de ligne de galvanisation au niveau du bain 2 d'alliage fondu sensiblement identique à celle de la figure 1, au moins dans ses composants principaux. On notera cependant que l'extrémité 6a de la gaine 6, et les rouleaux 4 et 5 sont rassemblés dans une zone du bain 1 de volume prédéterminé. Ce volume doit être plus petit que celui intérieur d'une cuve amovible 8 qui peut être suspendue dans la cuve fixe 2 au moyen de dispositi de suspension fixes (représentés par une charpente 9) qui s'étendent au-dessus de la cuve 2 et qui sont solidaires de la structure fixe susdite. Lorsque la cuve 8 est en place, sa position par rapport à la cuve 2 est telle qu'elle est presque totalement immergée dans le bain 1 d'alliage fondu qui constitue un moyen de transfert de chaleur entre les équipements de chauffage fixes par induction de la cuve 1 et un bain 10 contenu dans la cuve 8. On voit donc qu'il y a intérêt à disposer du maximum de surface de contact entre la cuve 8 et le bain 1, donc à l'immerger au maximum. Néanmoins on pourra prévoir un moyen de chauffage supplémentaire solidaire de la cuve 8.In Figure 2 we find a galvanizing line structure at the level of the
la mise en place de la cuve amovible 8 nécessite de dégac l'accès à la cuve fixe 2. Pour ce faire, on aura prévu que les rouleaux 4 et 5 seront démontables ainsi que les buses de soufflage 11 du gaz d'essorage montées à coulissement sur des rails,non représentés,transversaux à la direction de défilement de la bande. Pour ce qui concerne la gaine 6, on peut prévoir soit son escamotage par une articulation appropriée sur la structure fixe, soit une construction télescopique, soit enfin une partie inférieure portant l'extrémité 6a (ou sabot) aisément démontable.the installation of the removable tank 8 requires clearing the access to the
La mise en oeuvre du procédé selon l'invention est réalisée avec une installation conforme à celle de la figure 2. On voit qu'en l'absence de la cuve amovible 8 la bande métallique plonge dans le bain d'alliage 1 et est donc revêtue d'un premier revêtement caractérisant un premier produit issu de la ligne de galvanisation.The implementation of the method according to the invention is carried out with an installation in accordance with that of FIG. 2. It can be seen that in the absence of the removable tank 8 the metal strip plunges into the alloy bath 1 and is therefore coated with a first coating characterizing a first product from the galvanizing line.
La production d'un second produit, se distinguant du premier par un revêtement de nature différente, peut être réalisée sur la même ligne. Il convient alors, après arrêt de celle-ci, de démonter ou escamoter les organes 4, 5, 6, 7 et/ou 11 et, au moyen d'un pont de levage, d'approcher la cuve 8 de la cuve fixe 2 que l'on aura partiellement vidangée de son contenu. La cuve 8 contiendra de préférence un début de bain 10 d'un second alliage que l'on aura créé par exemple au moyen d'un four ou au moyen d'un chauffage auxiliaire qu'elle peut comporter.On sait en effet que la fusion de lingots est plus rapide lorsque ceux-ci sont en contact avec un bain déjà créé. La cuve 8, alors fixée aux dispositifs 9, trempe dans la partie de bain 1 restant dans la cuve 2 qui lui apporte les calories nécessaires à l'entretien du commencement de bain. On procède ensuite à la remise en place des organes 4, 5, 6, 7 et/ou 11 et au complément de chacun des bains 1 et 10 par apport de lingots ou pour le bain 1, d'une partie de la portion de vidange du bain initial qui aura pu être maintenue à l'état liquide. La bande métallique passe alors dans le bain 10 et est revêtue du second alliage susdit.The production of a second product, distinguished from the first by a coating of a different nature, can be carried out on the same line. It is then advisable, after the latter has been stopped, to disassemble or retract the
L'opération consistant à la mise en service de la cuve auxiliaire est relativement rapide si bien que le temps d'arrêt de la ligne de galvanisation n'est pas prohibitif quant à son incidence sur le prix de revient de la production. En outre, le procédé selon l'invention permet le passage sans aucun danger d'un alliage à un autre puisque ceux-ci sont contenus dans deux cuves différentes sans-aucune solution possible d'un composant du premier bain dans le second. C'est ainsi par exemple que l'on peut sur une même ligne produire des tôles revêtues avec un alliage contenant du plomb et avec un alliage zinc-aluminium dans lequel on sait que le plomb doit être exempt.The operation consisting in the commissioning of the auxiliary tank is relatively quick so that the downtime of the galvanizing line is not prohibitive as regards its impact on the production cost price. In addition, the method according to the invention allows the passage without any danger from one alloy to another since these are contained in two different tanks without any possible solution of a component of the first bath in the second. Thus, for example, it is possible on the same line to produce sheets coated with an alloy containing lead and with a zinc-aluminum alloy in which it is known that lead must be free.
L'invention n'est pas limitée à l'exemple qui vient d'en être donné mais couvre au contraire toutes les variantes qui pourraient lui être apportées sans sortir de son cadre ni de son esprit.The invention is not limited to the example 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 (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84401547T ATE31742T1 (en) | 1984-03-29 | 1984-07-23 | PROCESS FOR SUCCESSIVE ELECTROPLATION OF A METAL STRIP WITH TWO DIFFERENT METAL COATINGS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8404902A FR2562093B1 (en) | 1984-03-29 | 1984-03-29 | GALVANIZATION PROCESS FOR PRODUCING TWO DIFFERENT COATINGS ON A METAL STRIP |
| FR8404902 | 1984-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0157057A1 true EP0157057A1 (en) | 1985-10-09 |
| EP0157057B1 EP0157057B1 (en) | 1988-01-07 |
Family
ID=9302587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84401547A Expired EP0157057B1 (en) | 1984-03-29 | 1984-07-23 | Method of consecutively galvanizing a metallic wire with two different coatings |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4645694A (en) |
| EP (1) | EP0157057B1 (en) |
| JP (1) | JPS61500670A (en) |
| KR (1) | KR910006641B1 (en) |
| AT (1) | ATE31742T1 (en) |
| AU (1) | AU565765B2 (en) |
| BR (1) | BR8407306A (en) |
| CA (1) | CA1220679A (en) |
| DE (1) | DE3468439D1 (en) |
| FI (1) | FI78323C (en) |
| FR (1) | FR2562093B1 (en) |
| IN (1) | IN160743B (en) |
| WO (1) | WO1985004427A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPP107997A0 (en) * | 1997-12-22 | 1998-01-22 | Bhp Steel (Jla) Pty Limited | Coating metal strip |
| US20040121083A1 (en) * | 2002-11-07 | 2004-06-24 | Galvak, S.A. De C.V. | Method and apparatus for change-over of the molten metal coating composition in a steel strip coating line |
| DE102013101131A1 (en) * | 2013-02-05 | 2014-08-07 | Thyssenkrupp Steel Europe Ag | Apparatus for hot dip coating of metal strip |
| US11384419B2 (en) * | 2019-08-30 | 2022-07-12 | Micromaierials Llc | Apparatus and methods for depositing molten metal onto a foil substrate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2135388A (en) * | 1932-10-01 | 1938-11-01 | Crown Cork & Seal Co | Method of coating iron or steel articles with aluminum |
| US2751311A (en) * | 1954-09-28 | 1956-06-19 | Ajax Electric Company | Aluminizing |
| FR1538560A (en) * | 1967-07-26 | 1968-09-06 | Tech A Gordet Et Cie Off | Method and device for coating ferrous metals |
| US3758333A (en) * | 1969-07-07 | 1973-09-11 | Thompson E | Method for galvanizing |
| FR2378102A1 (en) * | 1977-01-21 | 1978-08-18 | Inst Elektroswarki Patona | BATH OVEN FOR HOT METALLIZATION |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53141127A (en) * | 1977-05-16 | 1978-12-08 | Nippon Steel Corp | Molten zinc plating device |
-
1984
- 1984-03-29 FR FR8404902A patent/FR2562093B1/en not_active Expired
- 1984-07-23 JP JP59502831A patent/JPS61500670A/en active Granted
- 1984-07-23 WO PCT/FR1984/000176 patent/WO1985004427A1/en active IP Right Grant
- 1984-07-23 BR BR8407306A patent/BR8407306A/en unknown
- 1984-07-23 US US06/804,657 patent/US4645694A/en not_active Expired - Fee Related
- 1984-07-23 AT AT84401547T patent/ATE31742T1/en not_active IP Right Cessation
- 1984-07-23 DE DE8484401547T patent/DE3468439D1/en not_active Expired
- 1984-07-23 EP EP84401547A patent/EP0157057B1/en not_active Expired
- 1984-07-23 AU AU31590/84A patent/AU565765B2/en not_active Ceased
- 1984-08-13 CA CA000460890A patent/CA1220679A/en not_active Expired
- 1984-08-13 IN IN645/DEL/84A patent/IN160743B/en unknown
- 1984-10-17 KR KR1019840006424A patent/KR910006641B1/en not_active IP Right Cessation
-
1985
- 1985-11-27 FI FI854696A patent/FI78323C/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2135388A (en) * | 1932-10-01 | 1938-11-01 | Crown Cork & Seal Co | Method of coating iron or steel articles with aluminum |
| US2751311A (en) * | 1954-09-28 | 1956-06-19 | Ajax Electric Company | Aluminizing |
| FR1538560A (en) * | 1967-07-26 | 1968-09-06 | Tech A Gordet Et Cie Off | Method and device for coating ferrous metals |
| US3758333A (en) * | 1969-07-07 | 1973-09-11 | Thompson E | Method for galvanizing |
| FR2378102A1 (en) * | 1977-01-21 | 1978-08-18 | Inst Elektroswarki Patona | BATH OVEN FOR HOT METALLIZATION |
Non-Patent Citations (2)
| Title |
|---|
| IBM TECHNICAL DISCLOSURE BULLETIN, vol. 8, no. 11, Avril 1966, page 1639, IBM Corp., New York, USA; C.H. SMITH Jr.: "Metal coating device with dross removal" * |
| PATENTS ABSTRACTS OF JAPAN, vol. 3, no. 14(C-36), 8 février 1979, page 141C36; & JP - A - 53 141 127 (SHIN NIPPON SEITETSU K.K.) 08-12-1978 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1985004427A1 (en) | 1985-10-10 |
| FI78323B (en) | 1989-03-31 |
| FI854696A0 (en) | 1985-11-27 |
| JPS61500670A (en) | 1986-04-10 |
| EP0157057B1 (en) | 1988-01-07 |
| FI854696A (en) | 1985-11-27 |
| US4645694A (en) | 1987-02-24 |
| AU3159084A (en) | 1985-11-01 |
| FR2562093A1 (en) | 1985-10-04 |
| DE3468439D1 (en) | 1988-02-11 |
| JPS6411110B2 (en) | 1989-02-23 |
| IN160743B (en) | 1987-08-01 |
| CA1220679A (en) | 1987-04-21 |
| BR8407306A (en) | 1986-04-15 |
| KR850007099A (en) | 1985-10-30 |
| FI78323C (en) | 1989-07-10 |
| AU565765B2 (en) | 1987-09-24 |
| KR910006641B1 (en) | 1991-08-29 |
| ATE31742T1 (en) | 1988-01-15 |
| FR2562093B1 (en) | 1988-07-22 |
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