EP2592171B1 - Procédé et dispositif de revêtement par galvanisation à chaud d'une bande métallique avec un revêtement métallique - Google Patents

Procédé et dispositif de revêtement par galvanisation à chaud d'une bande métallique avec un revêtement métallique Download PDF

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Publication number
EP2592171B1
EP2592171B1 EP12187954.8A EP12187954A EP2592171B1 EP 2592171 B1 EP2592171 B1 EP 2592171B1 EP 12187954 A EP12187954 A EP 12187954A EP 2592171 B1 EP2592171 B1 EP 2592171B1
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EP
European Patent Office
Prior art keywords
metal strip
molten bath
gas flow
nozzle
gas
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.)
Not-in-force
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EP12187954.8A
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German (de)
English (en)
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EP2592171A1 (fr
Inventor
Christopher Dr.-Ing. Gusek
Jörg SCHULTE
Marc Dr.-Ing. Blumenau
Fred Dipl.-Ing. Jindra
Dirk Dipl.-Ing. Czupryna
Rudolf Dipl.-Ing. Schönenberg
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ThyssenKrupp Steel Europe AG
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ThyssenKrupp Steel Europe AG
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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
    • C23C2/34—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
    • 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
    • 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

Definitions

  • the invention relates to a process for hot dip coating a metal strip with a metallic coating, in which the metal strip is passed in a continuous pass through a melt bath in which the thickness of the metallic coating present on its exit from the melt bath is adjusted by means of a scraping device, and wherein the slag present on the melt bath is expelled by means of a gas flow from the metal strip emerging from the melt bath.
  • the metal strips coated in this manner are hot or cold rolled steel strips.
  • the invention also relates to a device for hot dip coating a metal strip with a metallic coating, said device comprising a melt bath, a conveyor for continuously passing the metal strip through the melt bath, a stripping device for adjusting the thickness of the metal present on its exit from the molten bath on the metal strip Coating and at least one nozzle for discharging a gas stream, which expels existing slag on the melt bath of the emerging from the melt bath metal strip.
  • the continuous hot dipping refinement of the type specified initially represents an industrially established, economically and ecologically sensible process principle with which metallic flat products can be coated with a metallic coating, for example for the purpose of corrosion protection.
  • the hot dip finishing of a previously in-line recrystallization annealed metal strip with a Zn (hot dip galvanizing) or Al alloy coating (fire aluminizing) has a high importance for the production of starting material for sheet metal applications in the automotive, household appliance and mechanical engineering.
  • the annealed metal strip is passed through a melt bath consisting of a melt of the metal forming the respective coating or metal alloy forming the respective coating, and then deflected at least once within the melt bath via a roller system while being stabilized in its barrel until it comes out of the melt bath.
  • a melt bath consisting of a melt of the metal forming the respective coating or metal alloy forming the respective coating
  • deflected at least once within the melt bath via a roller system while being stabilized in its barrel until it comes out of the melt bath.
  • still molten coating material is stripped off after leaving the coating of wiping nozzles.
  • the stripping is usually done by blowing off by means of a gas stream.
  • purely mechanical stripping systems are also in use.
  • top slag is entrained by the metal strip emerging from the coating bath, the coating quality can be permanently impaired by the resulting imperfections. For example, so-called “smear” or the tape is damaged by indentations when the entrained slag adheres to subsequent roles and cakes. This sometimes creates significant costs due to rework and devaluation of the coated metal strip.
  • the discharge of larger lumps of top slag, so-called “bats”, can even lead to cost-intensive roller damage to the usually in-line downstream skin pass mill.
  • the plant operator is thus faced with the constant challenge of avoiding the entrainment of upper slag by the coated metal strip as far as possible.
  • mirror rollers are used in practice, which are positioned parallel to the width axis of the exiting metal strip and remove the slag coming into contact with them, which adheres to its surface, from the melt bath.
  • a motor-driven working material strips the top slag at a uniform speed of the coating surface.
  • motorized mirror rollers or motorized scrapers allows a continuous operation.
  • moving parts are in permanent contact with the coating bath. The industrial everyday life shows here that the aggressiveness of the molten coating bath a considerable Wear generated on such moving components. This applies to the coating of a steel strip with an Albaswholesome coating ("Feueralum ist").
  • a third way of preventing the slag from the metal strip emerging from the melt bath is by continuously circulating the coating bath and by establishing cooling zones, by means of which slag formation can be deliberately laid in surface areas of the melt bath which are remote from the strip run. The effectiveness of these measures can thereby be increased by directing the flows within the coating bath so that they act counter to the strip run. As a result, dissolved metal strip components are transported away from the metal strip. Procedures of this kind are in each case in the WO 2009/098362 A1 , of the WO 2009/098363 A1 , of the US 5,084,094 A1 , of the US Pat. No. 6,426,122 B1 and the US 6,177,140 B1 described.
  • the object of the invention was to provide a method and an apparatus for hot dip coating of metal strips, which allow with simple and inexpensive means to avoid the contact of slag with the emerging from the melt bath metal strip and to ensure an optimal surface quality.
  • the metal strip is passed continuously through a melt bath, then the thickness of the metallic coating present on the metal strip as it emerges from the melt bath set a scraper and thereby driven away on the melt bath slag by means of a gas stream of the emerging from the melt bath metal strip.
  • a gas stream flowing along the metal strip is directed along the surface of the melt bath and transversely to the conveying direction of the metal strip by means of at least one nozzle arranged laterally on one of the longitudinal edges of the metal strip emerging from the melt bath.
  • the nozzle for discharging the gas stream is now arranged laterally of the conveying path of the metal strip emerging from the melt bath and oriented such that the gas stream discharged by it flows along the surface of the melt bath and aligned transversely to the conveying direction of the metal strip, along the metal strip.
  • a particularly effective shielding of the emerging from the molten metal strip occurs when each side of each of the longitudinal edges of the emerging from the molten metal strip by means of at least one nozzle along the surface of the melt bath and transversely to the conveying direction of the metal strip aligned, flowing along the metal strip gas flow to Expelled driving the slag is discharged from the metal strip.
  • at least one nozzle is accordingly arranged on each of the longitudinal sides of the conveying path, wherein the gas flows emerging from opposite nozzles are directed against one another.
  • Another advantage of the invention is that existing hot dip coating systems can be retrofitted with a device according to the invention with little effort and can be operated in accordance with the invention.
  • the invention can be used independently of the composition of the respective processed melt bath.
  • the position and blowing direction of the respective nozzles used should be selected such that the gas flow applied in each case flows between wiping nozzles and coating bath surface along the metal strip and displaces the slag on the melt bath surface over the entire width of the metal strip emerging from the melt bath.
  • the gas flow should be directed directly to the coating surface to a to ensure the most effective expelling of the slag reaching there.
  • the horizontal angle of injection at which the central axis of the gas flow impinges on the surface of the melt bath, should be in the range of 10 ° - 30 °.
  • the horizontal angle of injection at which the central axis of the gas flow impinges on the surface of the melt bath, should be in the range of 10 ° - 30 °.
  • the portion of the gas flow passing over the coating bath surface without inducing a driving action on the top slag becomes too large and the remaining gas flow carries too little a pulse to safely drive the top slag over the entire metal strip width .
  • blowing angles in excess of 30 ° it can happen that the gas flow only exerts its effect on an area which is too narrow in area.
  • the gas flow then acts only selectively, which can cause not only insufficient gas flows at portions of the metal strip surface more distant from the nozzle, but also troublesome bath surfaces or turbulences on the melt bath surface, which degrade the coating result.
  • the gas flows are aligned so that a direct flow of the respective surface of the metal strip is avoided.
  • the band position of the metal strip could be destabilized in the Abstreifdüse. Therefore, the gas flow is optimally aligned in each case in such a way that it flows as far as possible parallel to the belt surface and, as far as possible, does not face the surfaces of the metal belt aligned transversely to the conveying direction of the metal belt directed impulse causes.
  • the central axis of the gas flow emerging from the nozzle associated with the one longitudinal edge may lie in a common plane with the central axis of the gas flow emerging from the other longitudinal edge, the nozzles being optimally oriented in this case so that the central axes of the gas flows lie in the same plane, in which the middle layer of the metal strip as it exits the melt bath.
  • the gas stream discharged from the respective nozzles is aligned so that the central axis of the respective gas stream lies in the plane in which the middle layer of the metal strip lies on its exit from the melt bath.
  • the gas flow strikes the edge of the metal strip emerging from the melt bath and is split into two sub-streams, one of which flows along one surface and the other along the other surface of the metal strip.
  • This proves to be particularly advantageous when the metal strip is at each of its two longitudinal edges flowing against a gas stream and the gas streams are aligned with each other so that their central axes lie in a common plane in which the center layer of the metal strip is located.
  • center layer of the metal strip is meant the layer which is arranged centrally between the two outer surfaces of the metal strip.
  • the nozzles may be expedient to arrange the nozzles in such a way that the nozzle is oriented in the manner explained above on the edges of the metal strip emerging from the melt bath from the one longitudinal edge associated nozzle discharged gas flow along one surface and the emerging from the other longitudinal edge associated nozzle gas stream flows along the other surface of the metal strip. In this way, large volume flows can be blown along the respective surface, without causing a mutual obstruction.
  • the respective gas stream may be air, a gas inert with respect to the melt bath, or a gas mixture formed from air and a gas inert to the melt bath. It has been found that pressurization of the gas flow supplied to the nozzles in the range of 1 to 15 bar leads to good results under the conditions prevailing in practice. A gas supply with pressures of less than 1 bar results in a poor coating result because the momentum of the gas flow is too low to effectively drive the top slag off the surface of the metal strip exiting the melt bath. A gas supply with pressures greater than 15 bar leads to a poor coating result, because the strong momentum of the gas stream in the coating bath surface in unwanted vibrations added or even stirred up.
  • the regulation and control of the gas flow can be done by the operator via adjustment of the horizontal, vertical and possibly axial alignment of the device according to the invention and the gas pressure take place.
  • the "blown" upper slag can be skimmed off in a conventional manner at a sufficient distance from the exiting metal strip mechanically from the coating.
  • the metal strips processed in accordance with the invention are typically cold-rolled or hot-rolled steel strips.
  • melt baths all of the metallic melts that can be applied by hot dip coating can be used. These include, for example, zinc or zinc alloy melts as well as aluminum or aluminum alloy melts.
  • a device 1 for the hot dip coating of a metal strip M which is, for example, cold-rolled steel strip made of a corrosion-sensitive steel, comprises a melt bath 3 filled in a vessel 2 into which the coating to be coated, previously in a known manner, has a sufficient immersion temperature brought metal strip M is passed over a trunk 4.
  • the metal strip M is deflected at a deflection roller 5 in such a way that it leaves the melt bath 3 in a vertically oriented conveying direction F. exit.
  • the metal strip M emerging from the melt bath 3 passes through a stripping device 7 arranged at a specific distance above the surface 6 of the melt bath 3.
  • This comprises two stripping nozzles 8,9 formed as slit nozzles, one of which comprises a stripping gas stream AG1 on the one surface O1 of the metal strip M extending on one side between the longitudinal edges L1 and L2 of the metal strip M, and the other of which directs a Abstreifgasstrom AG2 on the present on the opposite side of the metal strip M surface 02.
  • the metal strip M emerging from the melt bath 3 is aligned such that its center layer ML aligned centrally between the surfaces 01, 02 lies in a vertically oriented plane H.
  • two lance-like nozzles 10, 11 are arranged between the wiping nozzles 8, 9 of the wiping device 7 and the surface 6 of the melt bath 3, of which one is arranged laterally of one longitudinal edge L1 and the other laterally of the other longitudinal edge L2 of the metal strip M.
  • the lance-like nozzles 10,11 for example, consist of tubes with a tube diameter of 20 mm, which are connected via hand-operated cone valves to a gas supply, not shown here for clarity.
  • the gas supply may be, for example, a nitrogen house line, the is provided as standard in the building in which the device 1 is located.
  • the gas supply and pressure control takes place separately for each of the lance nozzles 10,11.
  • the pressure of the gas was varied within a pressure range of 1 - 15 bar, and also for each of the nozzles 10,11 individually.
  • the nozzles 10,11 each bring a gas flow G1, G2, which is formed for example by nitrogen gas.
  • the nozzle openings of the nozzles 10, 11 are aligned such that the central axes Ga1, Ga2 of the gas streams G1, G2 flowing towards each other lie in the plane H of the center layer ML of the metal strip M and, accordingly, the respective edges associated therewith at the respective longitudinal edge L1 , L2 meet.
  • the gas streams G1, G2 are divided at the longitudinal edges L1, L2 into two partial streams G11, G12 and G21, G22.
  • the partial flows G11, G21 flow toward each other along the one surface O1, while the other partial flows G12, G22 flow along the opposite surface 02 of the metal strip M.
  • the partial flows G11, G21 or G12, G22 assigned to the respective surfaces 01, 02 each meet in the area of the strip center MB, so that there arises a gas flow G ', G "directed away from the respective surface 01, 02 of the metal strip M. forces possibly acting on the metal strip M cancel each other out as they occur in the same way on both sides of the metal strip M.
  • the gas streams G1, G2, the partial gas streams G11-G22 formed therefrom, and the gas streams G ', G "flowing from the metal strip M and formed from the partial gas streams G11-G22 produce or form new slag on the surface 6 of the melt bath 3 S driven away from the metal strip M, so that the surface 6 of the melt bath 3 in the region A of the exit of the metal strip M from the melt bath 3 is kept largely free of slag and prevents contamination of existing on the surfaces 01,02 of the metal strip M metallic coating with slag becomes.
  • the embodiment shown are the nozzles 10,11, as well as in Fig. 1 indicated, offset in the horizontal direction H offset from one another so that only the effluent from the one nozzle 10 gas flow G1 flows along one surface 01 of the metal strip M, while emerging from the other nozzle 11 gas flow G2 along the other surface 02 of the metal strip M flows.
  • the gas streams G1, G2 drive away the slag S passing into the region A of the outlet of the metal strip M in the lateral direction, so that they move laterally in the region A to the opposite side Ranges of the melt bath 3 adjacent areas B1, B2 collects and there mechanically, that can be removed manually or by means of a suitable, motor-driven device from the surface 6 of the melt bath 3.
  • a single nozzle 10 laterally of the conveying path or the one longitudinal edge L1 of the metal strip M is aligned so that the central axis Ga1 of the gas stream G1 discharged by it as in the Fig. 1 and 2 illustrated embodiment in the plane H of the center layer ML of the metal strip M is located.
  • the horizontal orientation of the nozzles 10,11 is selected so that the gas flows G1, G2 meet with their respective central axis Ga1, Ga2 each at an injection angle ß on the surface 6 of the melt bath 3, which is in the range of 10 ° - 30 ° ,
  • the injection angle ⁇ is related to a parallel to the mirror of the surface 6 of the melt bath 3 oriented horizontal ( Fig. 5 ).
  • a N 2 gas flow was blown by means of nozzle nozzles 10,11 trained nozzle lances between the melt bath and stripping nozzles on a large industrial hot dip coating plant during the fire aluminizing.
  • the coating bath contained 9.5 wt .-% Si, 2.5 wt .-% Fe and the remainder A1 and traces of other elements and unavoidable impurities.
  • the speed of the metal strip emerging from the melt bath was 38 m / min with a coating layer to be applied of min. 75 g / m 2 per side of the metal strip M.
  • Table 1 shows in accordance with the invention below the stripping nozzles each side of the longitudinal edges of the metal strip arranged nozzle lances that this G recognizegebnis was not given if no gas flow was applied or the present invention given boundary conditions were left.

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  • 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)

Claims (16)

  1. Procédé de revêtement par galvanisation à chaud d'une bande métallique (M) avec un revêtement métallique, procédé
    - dans lequel la bande métallique (M) est conduite en continu à travers un bain de fusion (3),
    - dans lequel l'épaisseur du revêtement métallique, présent sur la bande métallique (M) lors de sa sortie du bain de fusion (3), est réglée au moyen d'un dispositif racleur (7),
    et
    - dans lequel les scories (S), présentes dans le bain de fusion (3), sont chassées au moyen d'un flux de gaz (G1, G2) de la bande métallique (M) sortant du bain de fusion (3),
    caractérisé en ce que, pour chasser de la bande métallique (M) les scories (S) présentes dans le bain de fusion (3), un flux de gaz (G1, G2), orienté le long de la surface (6) du bain de fusion (3), perpendiculairement à la direction de transport (F) de la bande métallique (M) et s'écoulant le long de la bande métallique (M), est épandu au moyen d'au moins une buse (10, 11) disposée à côté de l'un des bords longitudinaux (L1, L2) de la bande métallique (M) sortant du bain de fusion (3).
  2. Procédé selon la revendication 1,
    caractérisé en ce que, sur le côté de chacun des bords longitudinaux (L1, L2) de la bande métallique (M) sortant du bain de fusion (3), un flux de gaz (G1, G2), orienté le long de la surface (6) du bain de fusion (3) et perpendiculairement à la direction de déplacement (F) de la bande métallique (M), est épandu le long de la bande métallique (M) au moyen d'au moins une buse (10, 11) respective, pour chasser les scories (S) de la bande métallique (M).
  3. Procédé selon la revendication 2,
    caractérisé en ce que l'axe central (Ga1, Ga2) du flux de gaz (G1, G2) sortant de la buse (10, 11) associée à l'un des bords longitudinaux (L1, L2) et l'axe central (Ga2, Ga1) du flux de gaz (G2, G1) sortant de la buse (11, 10) associée à l'autre bord longitudinal (L2, L1), sont situés sur un plan commun (H).
  4. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'axe central (Ga2, Ga1) du flux de gaz respectif (G1, G2) est situé sur le plan H) sur lequel s'étend la position moyenne (ML) de la bande métallique (M) lors de sa sortie du bain de fusion (3).
  5. Procédé selon la revendication 2,
    caractérisé en ce que les buses (10, 11), respectivement installées à côté des bords longitudinaux (L1, L2) de la bande métallique (M) sortant du bain de fusion (3), sont disposées de telle manière que le flux de gaz (G1), qui sort de la buse (10) associée à l'un (L1) des bords longitudinaux, s'écoule le long de l'une (O1) des surfaces et l'autre flux de gaz (G2), qui sort de la buse (11) associée à l'autre bord longitudinal (L2), s'écoule le long de l'autre surface (02) de la bande métallique (M).
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que chaque flux de gaz (G1, G2) est composé d'air et d'un gaz inerte par rapport au bain de fusion (3) ou consiste en un mélange gazeux composé d'air et d'un gaz inerte par rapport au bain de fusion (3).
  7. Procédé selon la revendication 6,
    caractérisé en ce que le gaz inerte est de l'azote.
  8. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'angle d'insufflation (ß), se rapportant à une horizontale, sous lequel l'axe central (Ga1, Ga2) du flux de gaz (G1, G2) est dirigé sur la surface (6) du bain de fusion (3), est situé dans une gamme de 10° à 30°.
  9. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que chaque flux de gaz (G1, G2) souffle tangentiellement sur la surface du bain de fusion (3).
  10. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que les scories (S), chassées au moyen du flux de gaz (G1, G2) respectif, sont enlevées du bain de fusion (3) au moyen d'une installation mécanique.
  11. Dispositif de revêtement par galvanisation à chaud d'une bande métallique (M) avec un revêtement métallique,
    - avec un bain de fusion (3),
    - avec un dispositif de transport pour conduire en continu la bande métallique (M) à travers le bain de fusion (3),
    - avec un dispositif racleur (7) pour régler l'épaisseur du revêtement métallique présent sur la bande métallique (M) lors de sa sortie du bain de fusion (3),
    et
    - avec au moins une buse (10, 11) pour l'épandage d'un flux de gaz (G1, G2) destiné à chasser de la bande métallique (M) sortant du bain de fusion (3) les scories (S) présentes dans le bain de fusion (3),
    caractérisé en ce que la buse (10, 11) destinée à épandre le flux de gaz (G1, G2) est disposée latéralement à côté de la voie de transport de la bande métallique (M) sortant du bain de fusion (3) et est orientée de telle manière que le flux de gaz (G1, G2) qu'elle épand s'écoule le long de la surface (6) du bain de fusion (3) et perpendiculairement à la direction de transport (F) de la bande métallique (M).
  12. Dispositif selon la revendication 11,
    caractérisé en ce que la buse (10, 11), vue dans la direction de transport de la bande métallique (M) sortant du bain de fusion (3), est disposée entre le dispositif racleur (7) et la surface (6) du bain de fusion (3).
  13. Dispositif selon l'une des revendications 11 ou 12,
    caractérisé en ce que, sur chacun des côtés opposés l'un à l'autre de la voie de transport de la bande métallique (M) sortant du bain de fusion (3), est installée, latéralement, au moins une buse (10, 11) qui épand un flux de gaz (G1, G2) orienté le long de la surface (6) du bain de fusion (3) et perpendiculairement à la direction de transport (F) de la bande métallique (M), pour chasser les scories (S).
  14. Dispositif selon la revendication 13,
    caractérisé en ce que les axes centraux (Ga1, Ga2) des flux de gaz (G1, G2) s'échappant des buses (10, 11) disposées en face l'une de l'autre, sont situés sur un plan commun (H).
  15. Dispositif selon la revendication 14,
    caractérisé en ce que les axes centraux des flux de gaz sont situés sur le plan sur lequel s'étant la position moyenne de la bande métallique (M) lors de sa sortie du bain de fusion (3).
  16. Dispositif selon la revendication 15,
    caractérisé en ce que les buses, installées latéralement, de chaque côté de la voie de transport de la bande métallique (M) sortant du bain de fusion (3), sont disposées de telle manière que le flux de gaz sortant de l'une des buses s'écoule le long de la surface de la bande métallique (M) et que le flux de gaz sortant de l'autre buse s'écoule le long de l'autre surface de ladite bande métallique.
EP12187954.8A 2011-11-11 2012-10-10 Procédé et dispositif de revêtement par galvanisation à chaud d'une bande métallique avec un revêtement métallique Not-in-force EP2592171B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011118199A DE102011118199B3 (de) 2011-11-11 2011-11-11 Verfahren und Vorrichtung zum Schmelztauchbeschichten eines Metallbands mit einem metallischen Überzug

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EP2592171A1 EP2592171A1 (fr) 2013-05-15
EP2592171B1 true EP2592171B1 (fr) 2014-12-17

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EP12187954.8A Not-in-force EP2592171B1 (fr) 2011-11-11 2012-10-10 Procédé et dispositif de revêtement par galvanisation à chaud d'une bande métallique avec un revêtement métallique

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JPH02156054A (ja) * 1988-12-08 1990-06-15 Sumitomo Metal Ind Ltd 溶融メッキ鋼板へのドロス押込み防止方法
JPH02305948A (ja) * 1989-05-19 1990-12-19 Kawasaki Steel Corp 連続溶融金属めっき用スナウト内部のドロス除去装置
FR2654749B1 (fr) 1989-11-21 1994-03-25 Sollac Procede et dispositif d'epuration d'un bain de metal liquide au temps chaud d'une bande d'acier.
DE4300868C1 (de) 1993-01-15 1994-03-17 Duma Masch Anlagenbau Beschichtungsvorrichtung
DE4223343C1 (de) 1992-07-16 1994-03-17 Duma Masch Anlagenbau Abblasvorrichtung
JP2895725B2 (ja) 1993-11-25 1999-05-24 川崎製鉄株式会社 溶融めっきドロス除去方法
US6177140B1 (en) 1998-01-29 2001-01-23 Ispat Inland, Inc. Method for galvanizing and galvannealing employing a bath of zinc and aluminum
EP1070765A4 (fr) 1998-04-01 2008-10-08 Jfe Steel Corp Procede de zingage par immersion a chaud et dispositif afferent
JP3718489B2 (ja) * 2002-07-25 2005-11-24 新日本製鐵株式会社 溶融金属めっきにおけるスナウト内ドロスの除去装置および除去方法
DE102006030914A1 (de) 2006-06-29 2008-01-03 Salzgitter Flachstahl Gmbh Verfahren und Vorrichtung zum kontinuierlichen Feuerverzinken von Stahlband
AU2008350133B2 (en) 2008-02-08 2012-11-22 Clecim SAS Method for the hardened galvanisation of a steel strip
KR101520136B1 (ko) 2008-02-08 2015-05-13 지멘스 바이 메탈스 테크놀로지 에스에이에스 강철 스트립의 경화식 갈바나이징용 장치

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ES2531383T3 (es) 2015-03-13
DE102011118199B3 (de) 2013-05-08

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