EP1386016B1 - Verfahren und vorrichtung zum schmelztauchbeschichten eines metallischen bandes - Google Patents

Verfahren und vorrichtung zum schmelztauchbeschichten eines metallischen bandes Download PDF

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Publication number
EP1386016B1
EP1386016B1 EP02719575A EP02719575A EP1386016B1 EP 1386016 B1 EP1386016 B1 EP 1386016B1 EP 02719575 A EP02719575 A EP 02719575A EP 02719575 A EP02719575 A EP 02719575A EP 1386016 B1 EP1386016 B1 EP 1386016B1
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EP
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Prior art keywords
liquid metal
strip
narrow duct
duct
narrow
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EP02719575A
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English (en)
French (fr)
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EP1386016A1 (de
Inventor
Yves Hardy
Jean Crahay
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Centre de Recherches Metallurgiques CRM ASBL
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Centre de Recherches Metallurgiques CRM ASBL
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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
    • C23C2/0035—Means for continuously moving substrate through, into or out of the 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
    • C23C2/50—Controlling or regulating the coating processes
    • C23C2/52—Controlling or regulating the coating processes with means for measuring or sensing

Definitions

  • the present invention relates to a method for coating a metal strip by dipping, that is to say by continuous scrolling through a liquid metal.
  • the invention also relates to a device for implementing this method.
  • JP-A-2-8356 discloses a method and apparatus for coating a web of tempered steel by means of a liquid metal. We pass the band in a narrow channel traversed by the liquid metal on both sides of the band. The channel is fed by a separate reservoir comprising the liquid metal, coupled to a pump that creates a circulation movement in a closed circuit. The tank has a larger capacity than said channel. The liquid metal is filtered by a purification device before introducing it into said channel.
  • Galvanizing by dipping a steel strip generally comprises two main operations, namely annealing the strip and depositing the coating.
  • the corresponding installation therefore comprises two large parts, namely an oven annealing and a galvanizing tank.
  • annealing is to prepare the strip, in particular its surface, with a view to the following coating operation.
  • it ensures the recrystallization of hardened structure in the case of a cold rolled strip; it also operates, in all cases, cleaning and brightening the surface with an atmosphere suitable, generally reducing, comprising hydrogen and nitrogen.
  • conventional galvanizing involves passing a band of steel through a bath of molten zinc then, at the exit of this bath, to adjust the thickness the zinc layer by spinning with compressed air or nitrogen slats.
  • the strip is guided by several rollers, in particular a first roller, said bottom roller, entirely immersed in zinc, under which it passes before rising vertically towards the surface of the bath, and other rollers, called stabilizing, deflecting or guiding rollers, often partially or even totally immersed near the upper surface of the bath of liquid metal, intended to ensure the stabilization, possibly the flatness of the coated strip, before spinning.
  • rollers in particular a first roller, said bottom roller, entirely immersed in zinc, under which it passes before rising vertically towards the surface of the bath, and other rollers, called stabilizing, deflecting or guiding rollers, often partially or even totally immersed near the upper surface of the bath of liquid metal, intended to ensure the stabilization, possibly the flatness of the coated strip, before spinning.
  • rollers motorized or free, come into contact with the surface of the belt in movement and can thus cause surface defects. They must be frequently dismantled for inspection, repair or replacement as their condition significantly influences the quality of the zinc coating. As a result, frequent shutdown of the production line and significant loss of productivity.
  • the person skilled in the art is well aware of the difficulty of regulating and maintaining the composition of the coating metal. This is hardly ever a pure metal, but rather an alloy containing different elements in specific quantities but variables from one type to another, intended to improve the performance of coatings, as for example the additions of aluminum in galvanizing baths.
  • mattes that is to say aggregates of particles of compounds intermetallic compounds, formed inter alia by the dissolution of the extreme surface of steel strips by the liquid metal bath, also cause appearance defects well known, and should therefore be regularly eliminated. This results in losses of time and metal, which adversely affect the productivity and profitability of the processes conventional.
  • the object of the invention is to propose a method for coating a web tempered metal, which makes it possible to remedy the aforementioned drawbacks, in particular by removing all submerged rolls and ensuring a constant composition liquid metal in the coating zone.
  • it proposes a device for carrying out this method.
  • a method for coating a metal strip at quenched by means of a liquid metal in which said strip is passed through a volume of said liquid metal, is characterized in that said band is circulated in a thin channel, in that the liquid metal is introduced into said thin channel at less on both sides of the band, and in that a movement of circulating said liquid metal with respect to said band, inside said thin channel. It is found then that the coating is made by contact with the surface of the metal strip with a flow of liquid metal rather than a coating of said surface by immersion in a bath of liquid metal.
  • said thin liquid metal channel is fed from a source separate, constituted for example by a separate tank; such a separate tank is advantageously arranged higher than said thin channel, so as to ensure feeding at least partially by a gravimetric effect.
  • a source separate constituted for example by a separate tank; such a separate tank is advantageously arranged higher than said thin channel, so as to ensure feeding at least partially by a gravimetric effect.
  • the entire diet can also be provided by one or more pumps.
  • the liquid metal is subjected to at least one treatment before introducing it into said thin channel.
  • said treatment may include filtering the liquid metal before introducing it into the thin channel.
  • the chemical composition and / or the temperature of the liquid metal is measured at determined intervals, preferably continuously, the chemical composition and / or the temperature of the liquid metal and, if necessary, this chemical composition and / or this temperature is adjusted before introducing the liquid metal into said thin channel. It is thus possible to maintain less substantially constant these conditions governing the coating operation at dipped from the metal band.
  • the supply of said thin closed circuit channel avoids any contact of the liquid metal with the ambient air, and as a result any risk of alteration of the liquid metal, in particular by oxidation.
  • said thin channel is powered liquid metal under a pressure independently adjustable on each side of the band.
  • the feed pressure is regulated liquid metal, as the case may be, by varying the difference in level between the thin channel and the separate tank, or by changing the pressure provided by the pumps Power.
  • the speed of circulation of the liquid metal stream with respect to the band, inside said channel thin is between 0.1 m / s and 5 m / s.
  • a device for carrying out this method essentially comprises a thin channel, means for circulating the tape to be coated through said thin channel, as well as means for supplying said thin liquid metal channel and for create a circulation movement of the liquid metal with respect to the band, inside of the thin channel.
  • the section of the thin channel according to the invention is determined so as to allow the passage of the widest band to be covered, without the need for excessive liquid metal.
  • the width of the next thin channel the invention is generally between 1 m and 2 m. It goes without saying that this width could be increased or decreased depending on specific circumstances.
  • the height of the thin channel defines the thickness of the liquid metal layer in circulation, and therefore also influences the flow of liquid metal in the thin channel. This height is preferably less than 6 cm, and more preferably less than 3 cm, so as to be able to limit the flow of liquid metal in the thin channel.
  • the thin channel according to the invention may have a shape that is either flat or curved in particularly partially cylindrical. In the latter case, the curvature must be limited so as not to unnecessarily complicate the trajectory and guidance of the tape.
  • the tape to be coated flows through said channel under the action of the traction exerted by the drive systems of the coating line. Its trajectory is determined by guiding means, generally rollers, arranged outside the channel, upstream and downstream of it, so as not to damage the surface of the tape during the coating operation.
  • this distance is between 1 mm and 15 mm, depending on various parameters such as the speed and width of the band, the nature of the liquid metal, the length and / or shape of the path of the thin channel.
  • the thin channel according to the invention comprises, on the one hand, feed means liquid metal, and secondly means to create a circulation movement of the liquid metal with respect to the band, inside the thin channel.
  • Said supply means comprise at least one separate reservoir, a much larger capacity than the thin channel; this tank is connected to the thin channel by a supply circuit leading to means for introducing the metal liquid in the thin channel, on both sides of the band that circulates there.
  • These means of introduction can be constituted either by injectors arranged in at least one ends of the channel, or by injectors in the walls of the canal parallel to the plane of the band, either by a combination of these two types injectors.
  • the reservoir separated can be raised compared to the thin channel, or the supply circuit can have at least one pump.
  • the device also comprises means for control and adjustment of the temperature and / or composition of the liquid metal, means for adding fresh liquid metal as well as means for filtering the metal liquid before its introduction into the thin canal.
  • the channel is provided with sealing means, such as airlock at its ends, allowing passage of the band but preventing metal leakage liquid.
  • the channel can advantageously be integrated in a closed circuit, comprising also at least one feed tank, possibly raised, a circuit supply of the thin channel, an excess liquid metal recovery circuit, means for treating the liquid metal, and possibly at least one pump of circulation of the liquid metal.
  • the method and the device of the invention make it possible to coat a strip by immersion in a moving liquid metal stream of high velocities relative to the web. These speeds are higher than those resulting from the scrolling of the band in a bath of liquid metal at rest.
  • FIG. 1 represents a conventional device for galvanizing dipping a steel strip, integrated into a processing line.
  • a band coat 1 is treated in a continuous annealing furnace 2, from which it leaves by a trunk 3 to dive into a bath of molten zinc 4.
  • the strip 1 passes under a roll of bottom 5, completely immersed in the liquid zinc 4, then it is guided by 6 immersed stabilizing rollers near the upper surface of the bath of zinc 4, before leaving the zinc bath in a vertical path.
  • Excess zinc is dewatered by means of gas strips, generally air or nitrogen, under pressure 7.
  • the strip 1 then rises vertically up to an upper deflection roll 8, which is high enough for the zinc coating to solidify before reach it. Tape 1 then continues its way into the treatment line.
  • the strip to be coated 1 circulates through a zinc bath liquid at rest 4, and it is in direct contact with several submerged rollers 5, 6.
  • the strip to be coated 1 from a continuous annealing furnace (not shown), circulates through a thin channel 10 in which a stream of liquid metal 9 has been created.
  • the channel 10 is straight and slightly inclined upward, and the circulation of the metal liquid is provided by a pump 11.
  • the band 1 and the current of liquid metal 9 circulate in the ascending direction, indicated by arrows. of the sealing systems, not shown, are provided at the inlet and output of the band 1 in the channel 10.
  • FIG. 3 shows how it is possible to control, at least in part, the position of the band in a thin channel, according to the method of the invention.
  • a circulation movement of the liquid metal is created, for example molten zinc, in the channel 10, on either side of the strip 1.
  • This current flows preferably at high speed, and is inevitably accompanied by pressure gradients between the band 1 and the walls of the channel 10.
  • the paths hydraulic fluid that the liquid metal follows in channel 10 can be designed to create pressure differences between the faces of the band and thereby influence the position of the band in the channel. Indeed, even if they are of low amplitude, these pressure differences act on important surfaces, namely the surface both sides of the strip in the channel, and they can thus generate forces considerable.
  • FIG. 3a illustrates the simple case of a thin rectilinear channel 12, practically horizontal, in which the band 1 circulates equidistant from the two walls.
  • the 13 pressures on the underside of the strip are higher than those 14 on the upper side, to support the weight of tape 1 while now it in a centered position in the channel 12.
  • the channel 15 is in the form of a parabola, corresponding to the form called "chain” that takes naturally band 1 hanging freely between two upper rollers not shown.
  • Such a parabolic trajectory of the band 1 can be maintained by a control permanent speed of the band upstream and downstream of channel 15. It is also maintained by the pressures that the liquid metal exerts on the band; if the pressures 16 on the inner face are higher than those 17 on the face external, they are even able to compensate for traction in the band. In such a configuration of the channel, it is particularly easy to ensure the tightness of the channel, collecting the liquid metal overflowing at both ends of the channel for the reintroduce in the lower part, for example using pumps 18.
  • FIG. 3c shows a channel 15 of a shape close to that of the usual path of a strip 1 in a dip coating installation of the type illustrated in the In this configuration, the band 1, which undergoes the pull exerted by the line of treatment, is supported by the application of higher pressures 19 on the face internal than those exerted on the outer face.
  • band 1 can be guided in a controlled manner both at the inlet and the outlet of the canal, by means of pressure differentials 21, which advantageously replace, that is to say without contact, the guide rollers 6 of FIG.
  • the watertightness of the channel is assured with ease by collecting the metal excess liquid at both ends of the canal to reintroduce it into the lower, for example using a common pump 22.
  • the supply of the thin liquid metal channel is preferably provided by openings in the walls of the canal so as to distribute in a similar way as uniform as possible the pressures acting on the faces of the band.
  • Figure 4 shows various possible arrangements of these feed orifices in a portion of a channel wall 23.
  • the orifices can be either slits 24 parallel and / or perpendicular to the direction 25 of displacement of the strip (FIG 4a), or orifices, for example circular 26, arranged in lines parallel to the direction of movement of the the band (Fig. 4b), again orifices, for example circular holes 27, distributed regularly, for example in staggered rows, in the canal wall (Fig. 4c).
  • FIG. 5 illustrates various possible configurations of the liquid metal circuit, with a treatment unit, possibly combined with a raised outer tank.
  • a horizontal rectilinear channel 12 traversed by a band 1, is fed directly by means of a pump 28.
  • the liquid metal is recovered at the ends of the channel 12 and returned by the pump 28, first to a unit treatment 29 and then directly into the channel 12.
  • FIG. 5b also shows a horizontal rectilinear channel 12 traversed by a tape to be coated 1.
  • This channel 12 is fed by gravity from a raised tank 30 large capacity, while the excess liquid metal is recovered at ends of the channel 12 and returned, still by gravity, into a collection tank 32. From there, the liquid metal is then returned to the elevated tank 30 at by means of a pump 31.
  • a treatment unit 29 is placed between the reservoir 30 and the channel 12 and / or between the pump 31 and the reservoir 30.
  • Figure 5c The configuration of Figure 5c is similar to that of Figure 5a, with the difference that the channel 33 here marries the path of the band 1 in a coating line to conventional tempering.
  • the excess liquid metal is recovered at the ends elevated channel 33 and returned to the low point of this channel, through a pump 28 and a processing unit 29.
  • Figure 5d illustrates a layout, similar to that of Figure 5b, but where the channel 33 marries the path of the band 1 in a line of dipping coating conventional.
  • Channel 33 is fed directly at its low point by gravity, at from a raised tank 30 of large capacity; the excess liquid metal is recovered at the raised ends of the channel 33 and returned, also by gravity, in a collection tank 32. From this, the molten metal is returned to the raised tank 30 by means of a pump 31.
  • a treatment unit 29 is provided between the reservoir 30 and the channel 33, and / or between the pump 31 and the reservoir 30.
  • the present invention offers numerous advantages, both as regards the process itself and the quality of coated products.
  • the continuous circulation of the liquid metal between the coating channel and a Separate tank allows to process the liquid metal continuously.
  • mattes that is to say the particles of compounds intermetallic compounds that float in the liquid metal and may deposit on the bandaged. This elimination can be done by any appropriate method, such as filtering, decantation, centrifugation, etc., especially in the mentioned treatment unit upper.
  • the quality of the coating depends in particular on the reactivity between the metal of coating and the surface of the tape to be coated.
  • high-grade steels resistance to be galvanized for the automotive industry have a surface low reactivity to zinc; this results in a lack of wettability that can lead to serious coating defects.
  • the introduction of a significant relative speed, for example from 0.5 m / s to 1 m / s, between the strip and the liquid metal in the channel contributes to reducing the risk of sticking on the strip, particles suspended in the liquid metal. This effect is in addition to that of the matting removal operation mentioned above.
  • the method of the invention restores the symmetry between the two faces of the strip, because none of the two faces of the strip is now no longer in contact with rollers. The actual duration and the conditions of exposure of the two sides of the strip to the liquid metal are identical.
  • the device of the invention is much simpler than conventional devices dip galvanizing. It requires a smaller amount of liquid metal, it offers greater operational flexibility and allows you to obtain products coated with better quality. Finally, it can integrate, without significant difficulty, in an existing treatment line, as shown in Figure 3c.

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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)
  • Chemically Coating (AREA)
  • Continuous Casting (AREA)

Claims (22)

  1. Verfahren zur Schmelztauchveredelung eines Metallbands (1) mit einem flüssigen Metall (4), bei dem:
    das besagte Band durch einen schmalen Kanal (10, 12, 15, 33) geführt wird, in den das flüssige Metall auf beiden Seiten des Bands eingespritzt wird;
    das besagte flüssige Metall durch den schmalen Kanal fließt;
    dadurch gekennzeichnet, dass außerdem auf beide Seiten des Bands unterschiedlicher Druck (13, 14; 16, 17; 19, 20) ausgeübt wird, um die Position des Bands in dem schmalen Kanal zu kontrollieren.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der besagte Unterschied des Drucks, der auf beide Seiten des Bands ausgeübt wird, dadurch entsteht, dass das Metall auf beiden Seiten des Bands unterschiedlich schnell läuft.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der besagte Unterschied des Drucks, der auf beide Seiten des Bands ausgeübt wird, dadurch entsteht, dass der Abstand zwischen den Wänden des schmalen Kanals und dem Metallband verändert wird, so dass bei gleichem Durchlauf eine Verringerung dieser Distanz eine Erhöhung des Drucks zur Folge hat.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der besagte Unterschied des Drucks, der auf beide Seiten des Bands ausgeübt wird, dadurch entsteht, dass das Einspritzen des Metalls auf beiden Seiten des Metallbands verändert wird.
  5. Verfahren nach einem der obenstehenden Ansprüche, dadurch gekennzeichnet, das der schmale Kanal (10, 12, 15, 33) und deshalb auch der Verlauf des Bands kurvenförmig, vorzugsweise parabel-, "Kettchen"- oder teilweise zylinderförmig ist.
  6. Verfahren nach einem der obenstehenden Ansprüche, dadurch gekennzeichnet, dass die Speisung des schmalen Kanals durch Schwerkraft aus einem getrennten Flüssigmetallbehälter (30) erfolgt.
  7. Verfahren nach einem der obenstehenden Ansprüche, dadurch gekennzeichnet, dass das Metall gefiltert wird, bevor es in den schmalen Kanal fließt.
  8. Verfahren nach einem der obenstehenden Ansprüche, dadurch gekennzeichnet, dass die Temperatur des flüssigen Metalls soweit möglich ständig kontrolliert und wenn nötig reguliert wird, bevor das Metall in den schmalen Kanal einfließt.
  9. Verfahren nach einem der obenstehenden Ansprüche, dadurch gekennzeichnet, dass die chemische Zusammensetzung des flüssigen Metalls soweit möglich ständig kontrolliert und wenn nötig angepasst wird, bevor das Metall in den schmalen Kanal einfließt.
  10. Verfahren nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Speisung des schmalen Kanals in einem geschlossenen Kreislauf erfolgt.
  11. Verfahren nach einem der obenstehenden Ansprüche, dadurch gekennzeichnet, dass die Stärke des Drucks, der auf die eine und auf die andere Seite des Bands im schmalen Kanal ausgeübt wird, einzeln geregelt werden kann.
  12. Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Strömungsgeschwindigkeit des flüssigen Metalls im Vergleich zu dem Band im schmalen Kanal zwischen 0,5 und 1m/s beträgt.
  13. Verfahren nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das zu beschichtende Band im schmalen Kanal durch die Zugkraft fortbewegt wird, die das Antriebssystem der Beschichtungsstraße ausübt, und dass die Bahn des Bands durch Steuerungsmittel, vorzugsweise Rollen, bestimmt wird, die sich außerhalb vor und nach dem schmalen Kanal befinden.
  14. Verfahren nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass das Band im schmalen Kanal eine Mindestdistanz von 1 bis 15 mm zu den Wänden des Kanals einhält, abhängig von Parametern wie der Geschwindigkeit und der Breite des Bands, der Art des flüssigen Metalls, der Länge und/oder der Form des schmalen Kanals.
  15. Vorrichtung zur Schmelztauchveredelung eines Metallbands nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass sie über einen schmalen Kanal (10, 12, 15, 33) verfügt sowie über Mittel, um das zu beschichtende Band durch den schmalen Kanal zu führen und Mittel, vorzugsweise mindestens eine Pumpe (11, 18, 22, 28, 31), um flüssiges Metall in den schmalen Kanal einfließen zu lassen und um eine Kreisbewegung des flüssigen Metalls im Inneren des schmalen Kanals zu verursachen.
  16. Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, dass sich unter den besagten Mitteln zur Speisung mindestens ein getrennter Behälter (30) befindet, der ein größeres Fassungsvermögen als der schmale Kanal hat, und dass dieser Behälter mit dem schmalen Kanal durch eine Speisungsleitung verbunden ist, die zu Möglichkeiten führt (24, 26, 27), das flüssige Metall in den schmalen Kanal fließen zu lassen, auf beiden Seiten des Bands (1), das sich im Kanal fortbewegt.
  17. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass der besagte getrennte Behälter (30) höher liegt, als der schmale Kanal, um eine Bewegung des flüssigen Metalls durch Schwerkraft zu erzeugen, einerseits von dem getrennten Behälter zum schmalen Kanal, und andererseits innerhalb des schmalen Kanals.
  18. Vorrichtung nach einem der Ansprüche 15 bis 17, dadurch gekennzeichnet, dass er über einen Filter (29) verfügt, um das flüssige Metall zu filtern, bevor es in den schmalen Kanal einfließt.
  19. Vorrichtung nach einem der Ansprüche 15 bis 19, dadurch gekennzeichnet, dass sie über Möglichkeiten (29) verfügt, die Temperatur des flüssigen Metalls zu messen und wenn nötig anzupassen, bevor das Metall in den schmalen Kanal einfließt.
  20. Vorrichtung nach einem der Ansprüche 15 bis 19, dadurch gekennzeichnet, dass sie über Möglichkeiten (29) verfügt, die chemische Zusammensetzung des flüssigen Metalls zu messen und wenn nötig anzupassen, bevor das Metall in den schmalen Kanal einfließt.
  21. Vorrichtung nach einem der Ansprüche 15 bis 20, dadurch gekennzeichnet, dass der schmale Kanal in einen geschlossenen Kreislauf eingefügt ist, zu dem ebenfalls mindestens ein Behälter, eventuell erhöht, ein Speisungskreis für den schmalen Kanal, ein Auffangkreis für das flüssige Metall und eventuell mindestens eine Pumpe für das flüssige Metall gehören.
  22. Vorrichtung nach einem der Ansprüche 15 bis 21, dadurch gekennzeichnet, dass die Höhe des schmalen Kanals, durch die die Dicke der zirkulierenden Schicht aus flüssigem Metall bestimmt wird, kleiner als 6 cm ist, und vorzugsweise sogar kleiner als 3 cm, so dass der Strom des flüssigen Metalls im schmalen Kanal begrenzt ist.
EP02719575A 2001-04-03 2002-03-28 Verfahren und vorrichtung zum schmelztauchbeschichten eines metallischen bandes Expired - Lifetime EP1386016B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE2001/0216A BE1014093A3 (fr) 2001-04-03 2001-04-03 Procede et dispsotif pour le revetement d'une bande metallique au trempe.
BE200100216 2001-04-03
PCT/BE2002/000047 WO2002083969A1 (fr) 2001-04-03 2002-03-28 Procede et dispositif pour le revetement d'une bande metallique au trempe

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EP1386016A1 EP1386016A1 (de) 2004-02-04
EP1386016B1 true EP1386016B1 (de) 2005-06-01

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EP (1) EP1386016B1 (de)
AT (1) ATE296905T1 (de)
BE (1) BE1014093A3 (de)
DE (1) DE60204453T2 (de)
ES (1) ES2242008T3 (de)
WO (1) WO2002083969A1 (de)

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JPS61199064A (ja) * 1985-02-27 1986-09-03 Hitachi Cable Ltd 溶融めつき装置
JPH028356A (ja) * 1988-06-25 1990-01-11 Kawasaki Steel Corp 溶融金属めっき法およびその装置
JPH02141564A (ja) * 1988-11-21 1990-05-30 Furukawa Electric Co Ltd:The 溶融Ｓｎメッキ線の製造方法
JPH08337858A (ja) * 1995-06-09 1996-12-24 Kawasaki Steel Corp 溶融金属めっき方法及び装置

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EP1386016A1 (de) 2004-02-04
BE1014093A3 (fr) 2003-04-01
WO2002083969A1 (fr) 2002-10-24
DE60204453D1 (de) 2005-07-07
ES2242008T3 (es) 2005-11-01
DE60204453T2 (de) 2006-05-18
ATE296905T1 (de) 2005-06-15

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