EP1611263A1 - Method and device for coating a metal bar by hot dipping - Google Patents

Method and device for coating a metal bar by hot dipping

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Publication number
EP1611263A1
EP1611263A1 EP04721491A EP04721491A EP1611263A1 EP 1611263 A1 EP1611263 A1 EP 1611263A1 EP 04721491 A EP04721491 A EP 04721491A EP 04721491 A EP04721491 A EP 04721491A EP 1611263 A1 EP1611263 A1 EP 1611263A1
Authority
EP
European Patent Office
Prior art keywords
coating
metal
guide channel
coating metal
container
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
Application number
EP04721491A
Other languages
German (de)
French (fr)
Other versions
EP1611263B1 (en
Inventor
Rolf Brisberger
Bernhard Tenckhoff
Holger Behrens
Hans-Georg Hartung
Walter Trakowski
Michael Zielenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1611263A1 publication Critical patent/EP1611263A1/en
Application granted granted Critical
Publication of EP1611263B1 publication Critical patent/EP1611263B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
    • 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
    • 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
    • C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
    • C23C2/00362—Details related to seals, e.g. magnetic means
    • 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
    • C23C2/006—Pattern or selective deposits
    • 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

Definitions

  • the invention relates to a method for hot-dip coating a metal strand, in particular a steel strip, in which the metal strand is passed vertically through a container holding the molten coating metal and through an upstream guide channel of a defined height, an electromagnetic field being used to retain the coating metal in the container in the region of the guide channel is generated by means of at least two inductors arranged on both sides of the metal strand. Furthermore, the invention relates to a device for hot-dip coating a metal strand.
  • the strips are introduced into the dip coating bath from above in an immersion nozzle. Since the coating metal is in liquid form and the gravitation is used together with blow-off devices If you want to use the coating thickness setting, but the subsequent processes prohibit contact with the strip until the coating metal has completely solidified, the strip must be deflected in the vertical direction in the coating vessel. This happens with a roller that runs in the liquid metal. Due to the liquid coating metal, this role is subject to heavy wear and is the cause of downtimes and thus failures in production.
  • solutions which use a coating vessel which is open at the bottom and has a guide channel of a defined height in its lower region for vertical tape passage upwards and an electromagnetic one for sealing Insert closure.
  • electromagnetic inductors that work with pushing back, pumping or constricting electromagnetic alternating or traveling fields that seal the coating vessel downwards.
  • DE 195 35 854 A1 and DE 100 14 867 A1 provide special solutions for precise regulation of the position of the metal strand in the guide channel. According to the concepts disclosed there, it is provided that, in addition to the coils for generating the electromagnetic traveling field, additional correction coils are provided which are connected to a control system and ensure that the metal strip is brought back into the central position when it deviates.
  • a generic method is also described in EP 0 630 421 B1, in which it is further provided that a pre-melting container is assigned to the coating container holding the coating metal, which is several times larger in volume than the coating container.
  • the coating container is supplied with coating metal from the premelting container when it is conveyed out of the coating container through the coated metal strand.
  • the electromagnetic closure used to seal the guide channel in the solutions discussed above represents a magnetic pump that retains the coating metal in the coating container.
  • the invention is therefore based on the object of providing a method and an associated apparatus for hot-dip coating a metal strand, with which or with which it is possible to overcome the disadvantage mentioned. It should therefore be ensured that the immersion bath remains calm when an electromagnetic lock is used, which is intended to increase the quality of the coating. According to the method, this object is achieved in that a predetermined volume flow of coating metal is fed to the guide channel in the region of its vertical extent.
  • the closure which represents an electromagnetic pump, for sealing the guide channel no longer works virtually in an idle state, but instead is supplied with a volume flow of coating metal and promotes it.
  • the surprising result is that the surface of the metal bath is calmed down, which has a very positive influence on the quality of the hot-dip coating.
  • the container in which the coating metal is located is connected to a supply system (supply tank) for coating metal.
  • supply tank supply tank
  • the mass discharge that is required to maintain a constant level in the container is conveyed into the container from the supply tank, since the metal strand, when conveyed by the coating system, conveys coating metal out of the container.
  • the predetermined volume flow corresponds to the total metal tracking volume per time required to maintain the level.
  • the coating metal volume flow is advantageously fed to the guide channel in a controlled or regulated manner.
  • the device for hot-dip coating a metal strand in which the metal strand passes vertically through which the molten coating metal receiving container and is guided through the upstream guide channel, has at least two inductors arranged on both sides of the metal strand in the region of the guide channel for generating an electromagnetic field for retaining the coating metal in the container.
  • the device is characterized by at least one supply line for supplying a predetermined volume flow of coating metal, which opens into the guide channel in the region of the vertical extent thereof.
  • the feed line can open into the area of the long side of the guide channel. It can also open into the area of the end face of the guide channel.
  • the width or the diameter of the feed line is preferably small in relation to the dimension of the long side of the guide channel; this means in particular that the width or the diameter of the feed line is at most 10% of the width of the long side of the guide channel.
  • the coating container is connected to a supply system for coating metal, from which coating metal is fed into the feed line or into the feed lines.
  • Fig. 1 shows schematically a hot-dip coating device with a metal strand passed through it and
  • the device shown in the figures has a container 3 which is filled with molten coating metal 2.
  • molten coating metal 2 can be zinc or aluminum, for example.
  • the metal strand 1 to be coated in the form of a steel strip passes the container 3 vertically upwards in the conveying direction R. It should be noted at this point that it is fundamentally also possible for the metal strand 1 to pass the container 3 from top to bottom.
  • the inductors 5 are two alternating field or traveling field inductors arranged opposite one another, which are operated in the frequency range from 2 Hz to 10 kHz and build up an electromagnetic transverse field perpendicular to the conveying direction R.
  • the preferred frequency range for single-phase systems (AC field inductors) is between 2 kHz and 10 kHz, that for multi-phase systems (e.g. traveling field inductors) between 2 Hz and 2 kHz.
  • correction coils 13 are also arranged on both sides of the guide channel 4 or the metal strand 1. These are controlled by control means (not shown) such that the superimposition of the magnetic fields of the inductors 5 and the correction coils 13 always holds the metal strand 1 in the center of the guide channel 4.
  • the magnetic field of the inductors 5 can be strengthened or weakened depending on the control (superposition principle of the magnetic fields). In this way, the position of the metal strand 1 in the guide channel 4 can be influenced.
  • supply system 12 supply tank
  • inlet 16 is supplied via a pump 15.
  • a predetermined volume flow Q of coating metal 2 is fed to the guide channel 4 in the region of its vertical extent H.
  • two feed lines 6 and 7 lead into the area of the passage gap in the guide channel 4 which is necessary for the passage of the metal strand 1, specifically in the area of its vertical extension H.
  • the feed lines 6, 7, 8 and 9 are supplied with coating metal 2 by a pump 14 schematically outlined in FIG. 1.
  • the volume flow Q supplied by the pump 14 can form part of the volume flow coating metal which must be supplied to the bath in order to maintain the level h.
  • the entire amount of coating metal 2 required for this is supplied via the pump 14 per time, so that in this case no further delivery takes place via the pump 15.
  • coating metal 2 is first filled into the container 3 and, after the inductors 5 have been activated, the belt run is started. In stationary operation of the system, a volume flow Q of coating metal is then fed to the guide channel 4 via the feed lines 6, 7, 8 and 9, as explained.
  • the proposed solution offers the following possibility:
  • the inductors 5 are selectively driven to their full sealing capacity and no further coating metal is fed in via the feed lines 6, 7, 8, 9 (the pump 14 is switched off).
  • the feed lines 6, 7, 8, 9 then run empty and are thus available for removing the rest of the coating metal in the guide channel 4.
  • correction coils 13 in the guide channel 4 at the level of the feed lines 6, 7, 8, 9 (as explained above), these will also be ramped up to full power for moving off.
  • the additional correction coils 13 then form an additional field reinforcement in the middle of the guide channel 4, by means of whose “potential mountain” the rest of the coating metal 2 is caused to move laterally into the feed lines 6, 7, 8, 9. This supports the removal of the remaining amount of coating metal 2 in the guide channel 4.

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)

Abstract

The invention relates to a method for coating a metal bar (1), in particular a steel strap by hot dipping consisting in vertically passing the metal bar (1) through a container (2) containing a molten coating metal (3) and through a guiding channel (4) which is connected in series and has a predefined height (H). In order to retain the coating metal (2) in the container (3), an electromagnetic field is produced at the level of said guiding channel (4) by means of at least two inductors (5) which are arranged on two sides of the metal bar (1). In order to calm the coating bath, a predefined volume flow (Q) of the coating metal (2) is directed towards the guiding channel (4) at the level of the vertical extension (H) thereof. The inventive device for coating a metal bar by hot dipping is also disclosed.

Description

Verfahren und Vorrichtung zur Schmelztauchbeschichtung eines iVietallstrangesMethod and device for hot dip coating an iVietallstrang
Die Erfindung betrifft ein Verfahren zur Schmelztauchbeschichtung eines Metallstranges, insbesondere eines Stahlbandes, bei dem der Metallstrang vertikal durch einen das geschmolzene Beschichtungsmetall aufnehmenden Behälter und durch einen vorgeschalteten Führungskanal definierter Höhe hindurchgeführt wird, wobei zum Zurückhalten des Beschichtungsmetalls im Behälter im Bereich des Führungskanals ein elektromagnetisches Feld mittels mindestens zwei beiderseits des Metallstranges angeordneter Induktoren erzeugt wird. Des weiteren betrifft die Erfindung eine Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges.The invention relates to a method for hot-dip coating a metal strand, in particular a steel strip, in which the metal strand is passed vertically through a container holding the molten coating metal and through an upstream guide channel of a defined height, an electromagnetic field being used to retain the coating metal in the container in the region of the guide channel is generated by means of at least two inductors arranged on both sides of the metal strand. Furthermore, the invention relates to a device for hot-dip coating a metal strand.
Klassische Metall-Tauchbeschichtungsanlagen für Metallbänder weisen einen wartungsintensiven Teil auf, nämlich das Beschichtungsgefäß mit der darin befindlichen Ausrüstung. Die Oberflächen der zu beschichtenden Metallbänder müssen vor der Beschichtung von Oxidresten gereinigt und für die Verbindung mit dem Beschichtungsmetall aktiviert werden. Aus diesem Grunde werden die Bandoberflächen vor der Beschichtung in Wärmeprozessen in einer reduzierenden Atmosphäre behandelt. Da die Oxidschichten zuvor chemisch oder ab- rasiv entfernt werden, werden mit dem reduzierenden Wärmeprozess die Oberflächen so aktiviert, dass sie nach dem Wärmeprozess metallisch rein vorliegen.Classic metal dip coating systems for metal strips have a maintenance-intensive part, namely the coating vessel with the equipment contained therein. The surfaces of the metal strips to be coated must be cleaned of oxide residues before coating and activated for connection to the coating metal. For this reason, the strip surfaces are treated in a reducing atmosphere in heat processes before coating. Since the oxide layers are removed chemically or abrasively beforehand, the reducing heat process activates the surfaces so that they are metallically pure after the heat process.
Mit der Aktivierung der Bandoberfläche steigt aber die Affinität dieser Bandoberflächen für den umgebenden Luftsauerstoff. Um zu verhindern, dass Luftsauerstoff vor dem Beschichtungsprozess wieder an die Bandoberflächen gelangen kann, werden die Bänder in einem Tauchrüssel von oben in das Tauchbeschichtungsbad eingeführt. Da das Beschichtungsmetall in flüssiger Form vorliegt und man die Gravitation zusammen mit Abblasvorrichtungen zur Einstellung der Beschichtungsdicke nutzen möchte, die nachfolgenden Prozesse jedoch eine Bandberührung bis zur vollständigen Erstarrung des Beschich- tungsmetalls verbieten, muss das Band im Beschichtungsgefäß in senkrechte Richtung umgelenkt werden. Das geschieht mit einer Rolle, die im flüssigen Metall läuft. Durch das flüssige Beschichtungsmetall unterliegt diese Rolle ei- nem starken Verschleiß und ist Ursache von Stillständen und damit Ausfällen im Produktionsbetrieb.With the activation of the band surface, however, the affinity of these band surfaces for the surrounding atmospheric oxygen increases. In order to prevent atmospheric oxygen from reaching the strip surfaces again before the coating process, the strips are introduced into the dip coating bath from above in an immersion nozzle. Since the coating metal is in liquid form and the gravitation is used together with blow-off devices If you want to use the coating thickness setting, but the subsequent processes prohibit contact with the strip until the coating metal has completely solidified, the strip must be deflected in the vertical direction in the coating vessel. This happens with a roller that runs in the liquid metal. Due to the liquid coating metal, this role is subject to heavy wear and is the cause of downtimes and thus failures in production.
Durch die gewünschten geringen Auflagedicken des Beschichtungsmetalls, die sich im Mikrometerbereich bewegen können, werden hohe Anforderungen an die Qualität der Bandoberfläche gestellt. Das bedeutet, dass auch die Oberflächen der bandführenden Rollen von hoher Qualität sein müssen. Störungen an diesen Oberflächen führen im allgemeinen zu Schäden an der Bandoberfläche. Dies ist ein weiterer Grund für häufige Stillstände der Anlage.Due to the desired low contact thickness of the coating metal, which can be in the micrometer range, high demands are placed on the quality of the strip surface. This means that the surfaces of the tape-guiding rolls must also be of high quality. Faults on these surfaces generally lead to damage to the belt surface. This is another reason for frequent plant downtimes.
Um die Probleme zu vermeiden, die im Zusammenhang mit den im flüssigen Beschichtungsmetall laufenden Rollen stehen, sind Lösungen bekannt, die ein nach unten offenes Beschichtungsgefäß einsetzen, das in seinem unteren Bereich einen Führungskanal definierter Höhe zur vertikalen Banddurchführung nach oben aufweist und zur Abdichtung einen elektromagnetischen Verschluss einzusetzen. Es handelt sich hierbei um elektromagnetische Induktoren, die mit zurückdrängenden, pumpenden bzw. einschnürenden elektromagnetischen Wechsel- bzw. Wanderfeldern arbeiten, die das Beschichtungsgefäß nach unten abdichten.In order to avoid the problems associated with the rollers running in the liquid coating metal, solutions are known which use a coating vessel which is open at the bottom and has a guide channel of a defined height in its lower region for vertical tape passage upwards and an electromagnetic one for sealing Insert closure. These are electromagnetic inductors that work with pushing back, pumping or constricting electromagnetic alternating or traveling fields that seal the coating vessel downwards.
Eine solche Lösung ist beispielsweise aus der EP 0 673 444 B1 bekannt. Einen elektromagnetischen Verschluss zur Abdichtung des Beschichtungsgefäßes nach unten setzt auch die Lösung gemäß der WO 96/03533 bzw. diejenige gemäß der JP 5086446 ein.Such a solution is known for example from EP 0 673 444 B1. The solution according to WO 96/03533 or that according to JP 5086446 also uses an electromagnetic closure to seal the coating vessel downward.
Für eine genaue Regelung der Lage des Metallstranges im Führungskanal sehen die DE 195 35 854 A1 und die DE 100 14 867 A1 spezielle Lösungen vor. Gemäß den dort offenbarten Konzepten ist vorgesehen, dass neben den Spulen zur Erzeugung des elektromagnetischen Wanderfeldes zusätzliche Korrekturspulen vorgesehen sind, die mit einem Regelungssystem in Verbindung stehen und dafür Sorge tragen, dass das Metallband beim Abweichen von der Mittellage in diese wieder zurückgeholt wird.DE 195 35 854 A1 and DE 100 14 867 A1 provide special solutions for precise regulation of the position of the metal strand in the guide channel. According to the concepts disclosed there, it is provided that, in addition to the coils for generating the electromagnetic traveling field, additional correction coils are provided which are connected to a control system and ensure that the metal strip is brought back into the central position when it deviates.
Ein gattungsgemäßes Verfahren wird auch in der EP 0 630 421 B1 beschrieben, in der weiterhin vorgesehen ist, dass dem das Beschichtungsmetall aufnehmenden Beschichtungsbehälter ein Vorschmelzbehälter zugeordnet ist, der volumenmäßig um ein Vielfaches größer als der Beschichtungsbehälter ist. Der Beschichtungsbehälter wird aus dem Vorschmelzbehälter mit Beschichtungsmetall versorgt, wenn dieses durch den beschichteten Metallstrang aus dem Beschichtungsbehälter ausgefördert wird.A generic method is also described in EP 0 630 421 B1, in which it is further provided that a pre-melting container is assigned to the coating container holding the coating metal, which is several times larger in volume than the coating container. The coating container is supplied with coating metal from the premelting container when it is conveyed out of the coating container through the coated metal strand.
Der bei den vorstehend diskutierten Lösungen zum Einsatz kommende elek- tromagnetische Verschluss zur Abdichtung des Führungskanals stellt insoweit eine magnetische Pumpe dar, die das Beschichtungsmetall im Beschichtungsbehälter zurückhält.To this extent, the electromagnetic closure used to seal the guide channel in the solutions discussed above represents a magnetic pump that retains the coating metal in the coating container.
Die industrielle Erprobung derartiger Anlagen hat ergeben, dass das Strö- mungsbild auf der Oberfläche des Metallbades, d. h. die Badoberfläche, relativ unruhig ist, was auf die elektromagnetischen Kräfte durch den Magnetver- schluss zurückgeführt werden kann. Die Unruhe im Bad hat zur Folge, dass die Qualität der Schmelztauchbeschichtung negativ beeinflusst wird.The industrial testing of such systems has shown that the flow pattern on the surface of the metal bath, ie. H. the bath surface, is relatively restless, which can be attributed to the electromagnetic forces caused by the magnetic lock. The restlessness in the bathroom means that the quality of the hot-dip coating is negatively affected.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine zugehörige Vorrichtung zum Schmelztauchbeschichten eines Metallstranges zu schaffen, mit dem bzw. mit der es möglich ist, den genannten Nachteil zu überwinden. Es soll also sichergestellt werden, dass das Tauchbad beim Einsatz eines elektromagnetischen Verschlusses ruhig bleibt, wodurch die Qualität der Beschichtung erhöht werden soll. Die Lösung dieser Aufgabe durch die Erfindung ist verfahrensgemäß dadurch gekennzeichnet, dass ein vorgegebener Volumenstrom Beschichtungsmetall dem Führungskanal im Bereich seiner Höhenerstreckung zugeführt wird.The invention is therefore based on the object of providing a method and an associated apparatus for hot-dip coating a metal strand, with which or with which it is possible to overcome the disadvantage mentioned. It should therefore be ensured that the immersion bath remains calm when an electromagnetic lock is used, which is intended to increase the quality of the coating. According to the method, this object is achieved in that a predetermined volume flow of coating metal is fed to the guide channel in the region of its vertical extent.
Mit dieser Maßnahme wird erreicht, dass der eine elektromagnetische Pumpe darstellende Verschluss zur Abdichtung des Führungskanals nicht mehr quasi im Leerlauf arbeitet, sondern einen Volumenstrom Beschichtungsmetall zugeführt bekommt und fördert. Das überraschende Resultat ist, dass es auf der Oberfläche des Metallbades zu einer Beruhigung des Bades kommt, was die Qualität der Schmelztauchbeschichtung sehr positiv beeinflusst.With this measure it is achieved that the closure, which represents an electromagnetic pump, for sealing the guide channel no longer works virtually in an idle state, but instead is supplied with a volume flow of coating metal and promotes it. The surprising result is that the surface of the metal bath is calmed down, which has a very positive influence on the quality of the hot-dip coating.
Zumeist ist vorgesehen, dass der Behälter, in dem sich das Beschichtungsmetall befindet, mit einem Versorgungssystem (Versorgungstank) für Beschichtungsmetall in Verbindung steht. Aus dem Versorgungstank wird derjenige Massenaustrag in den Behälter nachgefördert, der zur Aufrechterhaltung einer konstanten Pegelhöhe im Behälter erforderlich ist, da der Metallstrang bei seiner Förderung durch die Beschichtungsanlage Beschichtungsmetall aus dem Behälter herausfördert.It is usually provided that the container in which the coating metal is located is connected to a supply system (supply tank) for coating metal. The mass discharge that is required to maintain a constant level in the container is conveyed into the container from the supply tank, since the metal strand, when conveyed by the coating system, conveys coating metal out of the container.
Gemäß einer ersten weiterbildenden Ausgestaltung ist daher vorgesehen, dass der vorgegebene Volumenstrom Beschichtungsmetall, der dem Führungskanal zugeführt wird, einem Teil des zur Aufrechterhaltung einer gewünschten Pegelhöhe des Beschichtungsmetalls im Behälter erforderlich Nachführvolumens Beschichtungsmetall pro Zeit entspricht. Alternativ dazu kann auch vorgesehen werden, dass der vorgegebene Volumenstrom dem gesamten zur Aufrechter- haltung des Pegels erforderlichen Metall-Nachführvolumens pro Zeit entspricht.According to a first further development, provision is therefore made for the predetermined volume flow of coating metal which is fed to the guide channel to correspond to a portion of the coating volume of coating metal required in order to maintain a desired level of the coating metal in the container per time. Alternatively, it can also be provided that the predetermined volume flow corresponds to the total metal tracking volume per time required to maintain the level.
Mit Vorteil wird der Volumenstrom Beschichtungsmetall dem Führungskanal in gesteuerter oder geregelter Weise zugeführt.The coating metal volume flow is advantageously fed to the guide channel in a controlled or regulated manner.
Die Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges, in der der Metallstrang vertikal durch den das geschmolzene Beschichtungsmetall auf- nehmenden Behälter und durch den vorgeschalteten Führungskanal hindurchgeführt wird, weist mindestens zwei beiderseits des Metallstranges im Bereich des Führungskanals angeordneten Induktoren zur Erzeugung eines elektromagnetischen Feldes zum Zurückhalten des Beschichtungsmetalls im Behälter auf.The device for hot-dip coating a metal strand, in which the metal strand passes vertically through which the molten coating metal receiving container and is guided through the upstream guide channel, has at least two inductors arranged on both sides of the metal strand in the region of the guide channel for generating an electromagnetic field for retaining the coating metal in the container.
Erfindungsgemäß ist die Vorrichtung gekennzeichnet durch mindestens eine Zuführleitung zum Zuführen eines vorgegebener Volumenstroms Beschichtungsmetall, die im Bereich der Höhenerstreckung des Führungskanals in diesen einmündet.According to the invention, the device is characterized by at least one supply line for supplying a predetermined volume flow of coating metal, which opens into the guide channel in the region of the vertical extent thereof.
Die Zuführleitung kann dabei in den Bereich der Längsseite des Führungskanals münden. Sie kann auch in den Bereich der Stirnseite des Führungskanals münden.The feed line can open into the area of the long side of the guide channel. It can also open into the area of the end face of the guide channel.
Bevorzugt ist die Breite bzw. der Durchmesser der Zuführleitung im Verhältnis zu der Abmessung der Längsseite des Führungskanals klein; darunter ist insbesondere zu verstehen, dass die Breite bzw. der Durchmesser der Zuführleitung höchstens 10 % der Breite der Längsseite des Führungskanals beträgt.The width or the diameter of the feed line is preferably small in relation to the dimension of the long side of the guide channel; this means in particular that the width or the diameter of the feed line is at most 10% of the width of the long side of the guide channel.
Eine bevorzugte Weiterbildung sieht schließlich vor, dass der Beschichtungsbehälter mit einem Versorgungssystem für Beschichtungsmetall in Verbindung steht, von dem aus Beschichtungsmetall in die Zuführleitung bzw. in die Zuführleitungen geleitet wird.Finally, a preferred further development provides that the coating container is connected to a supply system for coating metal, from which coating metal is fed into the feed line or into the feed lines.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:In the drawing, an embodiment of the invention is shown. Show it:
Fig. 1 schematisch eine Schmelztauch-Beschichtungsvorrichtung mit einem durch diese hindurch geführten Metallstrang undFig. 1 shows schematically a hot-dip coating device with a metal strand passed through it and
Fig. 2 den Schnitt A-A gemäß Fig. 1. Die in den Figuren dargestellte Vorrichtung weist einen Behälter 3 auf, der mit schmelzflüssigem Beschichtungsmetall 2 gefüllt ist. Bei diesem kann es sich beispielsweise um Zink oder Aluminium handeln. Der zu beschichtende Metallstrang 1 in Form eines Stahlbandes passiert den Behälter 3 in Förderrichtung R vertikal nach oben. Es sei an dieser Stelle angemerkt, dass es grundsätzlich auch möglich ist, dass der Metallstrang 1 den Behälter 3 von oben nach unten passiert.2 shows section AA according to FIG. 1. The device shown in the figures has a container 3 which is filled with molten coating metal 2. This can be zinc or aluminum, for example. The metal strand 1 to be coated in the form of a steel strip passes the container 3 vertically upwards in the conveying direction R. It should be noted at this point that it is fundamentally also possible for the metal strand 1 to pass the container 3 from top to bottom.
Zum Durchtritt des Metallstranges 1 durch den Behälter 3 ist dieser im Boden- bereich geöffnet; hier befindet sich ein übertrieben groß bzw. breit dargestellter Führungskanal 4. Dieser weist dabei eine vorgegebene Höhe H auf.To allow the metal strand 1 to pass through the container 3, it is open in the bottom area; here is an exaggeratedly large or wide guide channel 4. This has a predetermined height H.
Damit das schmelzflüssige Beschichtungsmetall 2 nicht durch den Führungskanal 4 nach unten abfließen kann, befinden sich beiderseits des Metallstranges 1 zwei elektromagnetische Induktoren 5, die ein magnetisches Feld erzeugen, das der Schwerkraft des Beschichtungsmetalls 2 entgegenwirkt und damit den Führungskanal 4 nach unten hin abdichtet.So that the molten coating metal 2 cannot flow down through the guide channel 4, there are two electromagnetic inductors 5 on both sides of the metal strand 1, which generate a magnetic field which counteracts the gravity of the coating metal 2 and thus seals the guide channel 4 downward.
Bei den Induktoren 5 handelt es sich um zwei gegenüber angeordnete Wech- selfeld- oder Wanderfeldinduktoren, die im Frequenzbereich von 2 Hz bis 10 kHz betrieben werden und ein elektromagnetisches Querfeld senkrecht zur Förderrichtung R aufbauen. Der bevorzugte Frequenzbereich für einphasige Systeme (Wechselfeldinduktoren) liegt zwischen 2 kHz und 10 kHz, der für mehrphasige Systeme (z. B. Wanderfeldinduktoren) zwischen 2 Hz und 2 kHz.The inductors 5 are two alternating field or traveling field inductors arranged opposite one another, which are operated in the frequency range from 2 Hz to 10 kHz and build up an electromagnetic transverse field perpendicular to the conveying direction R. The preferred frequency range for single-phase systems (AC field inductors) is between 2 kHz and 10 kHz, that for multi-phase systems (e.g. traveling field inductors) between 2 Hz and 2 kHz.
Zur Stabilisierung des Metallstranges 1 in der Mittenebene des Führungskanals 4 sind ferner Korrekturspulen 13 beiderseits des Führungskanals 4 bzw. des Metallstranges 1 angeordnet. Diese werden von - nicht dargestellten - Regelungsmitteln so angesteuert, dass die Überlagerung der magnetischen Felder der Induktoren 5 und der Korrekturspulen 13 den Metallstrang 1 stets mittig im Führungskanal 4 hält. Mittels der Korrekturspulen 13 kann das magnetische Feld der Induktoren 5 je nach Ansteuerung verstärkt oder abgeschwächt werden (Superpositionsprinzip der Magnetfelder). Auf diese Weise kann auf die Lage des Metallstranges 1 im Führungskanal 4 Einfluss genommen werden.To stabilize the metal strand 1 in the center plane of the guide channel 4, correction coils 13 are also arranged on both sides of the guide channel 4 or the metal strand 1. These are controlled by control means (not shown) such that the superimposition of the magnetic fields of the inductors 5 and the correction coils 13 always holds the metal strand 1 in the center of the guide channel 4. By means of the correction coils 13, the magnetic field of the inductors 5 can be strengthened or weakened depending on the control (superposition principle of the magnetic fields). In this way, the position of the metal strand 1 in the guide channel 4 can be influenced.
Beim Hindurchbewegen des Metallstranges 1 durch die Beschichtungs- vorrichtung erfolgt aufgrund des am Metallstrang 1 anhaftenden Beschich- tungsmetalls 2 ein Austrag Beschichtungsmetall aus dem Behälter 3. Um eine gewünschte Pegelhöhe h für das Beschichtungsmetall 2 im Behälter 3 aufrecht- zuerhalten, ist es daher erforderlich, Beschichtungsmetall 2 in den Behälter 3 nachzufordern.When moving the metal strand 1 through the coating device, coating metal is discharged from the container 3 due to the coating metal 2 adhering to the metal strand 1. In order to maintain a desired level h for the coating metal 2 in the container 3, it is therefore necessary to To request coating metal 2 in the container 3.
Dies erfolgt im Ausführungsbeispiel durch ein Versorgungssystem 12 (Versorgungstank), von dem über eine Pumpe 15 ein Zulauf 16 versorgt wird.In the exemplary embodiment, this is done by a supply system 12 (supply tank), from which an inlet 16 is supplied via a pump 15.
Um eine Beruhigung der Badoberfläche im Behälter 3 zu erreichen, ist vorgesehen, dass ein vorgegebener Volumenstrom Q Beschichtungsmetall 2 dem Führungskanal 4 im Bereich seiner Höhenerstreckung H zugeführt wird. Wie Fig. 1 entnommen werden kann, führen zu diesem Zwecke zwei Zuführleitun- gen 6 und 7 in den Bereich des für den Durchtritt des Metallstranges 1 notwendigen Durchtrittsspalt im Führungskanal 4, und zwar in Bereich dessen Höhenerstreckung H.In order to calm the bath surface in the container 3, it is provided that a predetermined volume flow Q of coating metal 2 is fed to the guide channel 4 in the region of its vertical extent H. For this purpose, as can be seen in FIG. 1, two feed lines 6 and 7 lead into the area of the passage gap in the guide channel 4 which is necessary for the passage of the metal strand 1, specifically in the area of its vertical extension H.
Wie es Fig. 2 entnommen werden kann, ist dabei vorgesehen, dass insgesamt vier Zuführleitungen 6, 7, 8 und 9 zum Durchtrittsspalt im Führungskanal 4 führen. Zwei davon - nämlich die Zuführleitungen 6 und 7 - münden dabei in die Längsseite 11 des Führungskanals 4; zwei weitere - nämlich die Zuführleitungen 8 und 9 - münden in die Stirnseite 10 des Führungskanals 4. Wie ferner gesehen werden kann, ist die Breite B der Zuführleitungen, namentlich im Bereich ihres Austritts in den Führungskanal 4, klein im Verhältnis zur Breite der Längsseite 11 des Führungskanals 4.As can be seen in FIG. 2, it is provided that a total of four feed lines 6, 7, 8 and 9 lead to the passage gap in the guide channel 4. Two of these - namely the feed lines 6 and 7 - open into the long side 11 of the guide channel 4; two more - namely the feed lines 8 and 9 - open into the end face 10 of the guide channel 4. As can also be seen, the width B of the feed lines, in particular in the region of their exit into the guide channel 4, is small in relation to the width of the long side 11 of the guide channel 4.
Die Zuführleitungen 6, 7, 8 und 9 werden dabei von einer in Fig. 1 schematisch skizzierten Pumpe 14 mit Beschichtungsmetall 2 versorgt. Wie bereits erwähnt, kann der durch die Pumpe 14 zugeführte Volumenstrom Q einen Teil des Volumenstroms Beschichtungsmetall ausmachen, das dem Bad zur Aufrechterhaltung der Pegelhöhe h zugeführt werden muss. Es kann aber auch vorgesehen werden, dass über die Pumpe 14 die gesamte hierfür nötige Menge Be- schichtungsmetall 2 pro Zeit zugeleitet wird, so dass in diesem Falle über die Pumpe 15 keine Förderung mehr erfolgt.The feed lines 6, 7, 8 and 9 are supplied with coating metal 2 by a pump 14 schematically outlined in FIG. 1. As already mentioned, the volume flow Q supplied by the pump 14 can form part of the volume flow coating metal which must be supplied to the bath in order to maintain the level h. However, it can also be provided that the entire amount of coating metal 2 required for this is supplied via the pump 14 per time, so that in this case no further delivery takes place via the pump 15.
Beim Anfahren der Beschichtungsanlage wird zunächst Beschichtungsmetall 2 in den Behälter 3 gefüllt und nach Aktivieren der Induktoren 5 der Bandlauf ge- startet. Im stationären Betrieb der Anlage wird dann wie erläutert ein Volumenstrom Q Beschichtungsmetall über die Zuführleitungen 6, 7, 8 bzw. 9 dem Führungskanal 4 zugeführt.When the coating system is started up, coating metal 2 is first filled into the container 3 and, after the inductors 5 have been activated, the belt run is started. In stationary operation of the system, a volume flow Q of coating metal is then fed to the guide channel 4 via the feed lines 6, 7, 8 and 9, as explained.
Eine weitere sehr vorteilhafte Wirkungsweise der erläuterten Vorrichtung und des Verfahrens zum Betreiben der Anlage betrifft die Arbeitsweise beim Abschalten bzw. Herunterfahren der Anlage:Another very advantageous mode of operation of the device explained and of the method for operating the system relates to the mode of operation when the system is switched off or shutdown:
Im bisher üblichen Betrieb bleibt immer ein Rest an Beschichtungsmetall 2 im Führungskanal 4, was auch durch den Metallstrang 1 nicht mehr aus dem Füh- rungskanal 4 herausgefördert werden kann. Der Rest des flüssigen Metalls muss mit hohem Aufwand nach dem Abstellen der Induktoren 5 mit einem Auffangsystem unten aufgefangen werden.In the operation customary hitherto, a remainder of coating metal 2 always remains in the guide channel 4, which can also no longer be conveyed out of the guide channel 4 by the metal strand 1. The rest of the liquid metal must be collected with great effort after the inductors 5 have been switched off using a collecting system at the bottom.
Mit der vorgeschlagenen Lösung eröffnet sich folgende Möglichkeit: Man fährt gezielt die Induktoren 5 auf volle Abdichtleistung und führt über die Zuführleitungen 6, 7, 8, 9 kein weiteres Beschichtungsmetall mehr nach (Abschalten der Pumpe 14). Die Zuführleitungen 6, 7, 8, 9 laufen daraufhin leer und stehen damit dem Abführen des Restes Beschichtungsmetall im Führungskanal 4 zur Verfügung.The proposed solution offers the following possibility: The inductors 5 are selectively driven to their full sealing capacity and no further coating metal is fed in via the feed lines 6, 7, 8, 9 (the pump 14 is switched off). The feed lines 6, 7, 8, 9 then run empty and are thus available for removing the rest of the coating metal in the guide channel 4.
Befinden sich zusätzlich noch in Höhe der Zuführleitungen 6, 7, 8, 9 Korrekturspulen 13 im Führungskanal 4 (wie oben erläutert), so werden auch diese auf volle Leistung zum Abfahren hochgefahren. Die zusätzlichen Korrekturspulen 13 bilden dann in der Mitte des Führungskanals 4 eine zusätzliche Feldverstär- kung, durch deren "Potentialberg" der Rest des Beschichtungsmetalls 2 veran- lasst wird, seitlich in die Zuführleitungen 6, 7, 8, 9 auszuweichen. Hierdurch wird das Ausfördern der Restmenge Beschichtungsmetall 2 im Führungskanal 4 unterstützt. If, in addition, there are correction coils 13 in the guide channel 4 at the level of the feed lines 6, 7, 8, 9 (as explained above), these will also be ramped up to full power for moving off. The additional correction coils 13 then form an additional field reinforcement in the middle of the guide channel 4, by means of whose “potential mountain” the rest of the coating metal 2 is caused to move laterally into the feed lines 6, 7, 8, 9. This supports the removal of the remaining amount of coating metal 2 in the guide channel 4.
Bezu szeichenlisteFor the list of characters
1 Metallstrang (Stahlband)1 metal strand (steel band)
2 Beschichtungsmetall2 coating metal
3 Behälter3 containers
4 Führungskanal4 guide channel
5 Induktor5 inductor
6 Zuführleitung6 supply line
7 Zuführleitung7 supply line
8 Zuführleitung8 feed line
9 Zuführleitung9 supply line
10 Stirnseite des Führungskanals10 face of the guide channel
11 Längsseite des Führungskanals11 Long side of the guide channel
12 Versorgungssystem12 supply system
13 Korrekturspule13 correction coil
14 Pumpe14 pump
15 Pumpe15 pump
16 Zulauf16 inflow
H Höhe des FührungskanalsH height of the guide channel
Q Volumenstrom h PegelhöheQ volume flow h level
B Breite der ZuführleitungB Width of the feed line
R Förderrichtung R direction of conveyance

Claims

Patentansprüche: claims:
1. Verfahren zur Schmelztauchbeschichtung eines Metallstranges (1), insbesondere eines Stahlbandes, bei dem der Metallstrang (1) vertikal durch einen das geschmolzene Beschichtungsmetall (2) aufnehmenden Behälter (3) und durch einen vorgeschalteten Führungskanal (4) definierter Höhe (H) hindurchgeführt wird, wobei zum Zurückhalten des Beschichtungs- metalls (2) im Behälter (3) im Bereich des Führungskanals (4) ein elektromagnetisches Feld mittels mindestens zwei beiderseits des Metallstranges (1) angeordneter Induktoren (5) erzeugt wird, dadurch gekennzeichnet, daß ein vorgegebener Volumenstrom (Q) Beschichtungsmetall (2) dem Führungskanal (4) im Bereich seiner Höhenerstreckung (H) zugeführt wird.1. Method for hot-dip coating a metal strand (1), in particular a steel strip, in which the metal strand (1) is passed vertically through a container (3) holding the molten coating metal (2) and through an upstream guide channel (4) of a defined height (H) In order to retain the coating metal (2) in the container (3) in the region of the guide channel (4), an electromagnetic field is generated by means of at least two inductors (5) arranged on both sides of the metal strand (1), characterized in that a predetermined one Volume flow (Q) coating metal (2) is fed to the guide channel (4) in the region of its vertical extent (H).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der vorgegebene Volumenstrom (Q) Beschichtungsmetall (2), der dem Führungskanal (4) zugeführt wird, einem Teil des zur Aufrechterhaltung einer gewünschten Pegelhöhe (h) des Beschichtungsmetalls (2) im Behälter (3) erforderlichen Nachführvolumens Beschichtungsmetall (2) pro Zeit entspricht.2. The method according to claim 1, characterized in that the predetermined volume flow (Q) coating metal (2), which is fed to the guide channel (4), a part of the maintenance of a desired level (h) of the coating metal (2) in the container ( 3) corresponds to the required tracking volume of coating metal (2) per time.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der vorgegebene Volumenstrom (Q) Beschichtungsmetall (2), der dem Führungskanal (4) zugeführt wird, dem gesamten zur Aufrechterhaltung einer gewünschten Pegelhöhe (h) des Beschichtungsmetalls (2) im Behälter (3) erforderlichen Nachführvolumens Beschichtungsmetall (2) pro3. The method according to claim 1, characterized in that the predetermined volume flow (Q) coating metal (2), which is fed to the guide channel (4), the whole for maintaining a desired level (h) of the coating metal (2) in the container (3 ) required tracking volume of coating metal (2) per
Zeit entspricht. Time corresponds.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Volumenstrom (Q) Beschichtungsmetall (2), der dem Führungskanal (4) zugeführt wird, gesteuert oder geregelt zugeführt wird.4. The method according to any one of claims 1 to 3, characterized in that the volume flow (Q) coating metal (2) which is fed to the guide channel (4) is supplied in a controlled or regulated manner.
5. Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges (1), insbesondere eines Stahlbandes, in der der Metallstrang (1) vertikal durch einen das geschmolzene Beschichtungsmetall (2) aufnehmenden Behälter (3) und durch einen vorgeschalteten Führungskanal (4) hindurchgeführt wird, mit mindestens zwei beiderseits des Metallstranges (1) im Bereich des Führungskanals (4) angeordneten Induktoren (5) zur Erzeugung eines elektromagnetischen Feldes zum Zurückhalten des Beschichtungsmetalls (2) im Behälter (3), insbesondere zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4, gekennzeichnet durch mindestens eine Zuführleitung (6, 7, 8, 9) zum Zuführen eines vorgegebenen Volumenstroms (Q) Beschichtungsmetall (2), die im Bereich der Höhenerstreckung (H) des Führungskanals (4) in diesen mündet.5. Device for hot-dip coating a metal strand (1), in particular a steel strip, in which the metal strand (1) is passed vertically through a container (3) that holds the molten coating metal (2) and through an upstream guide channel (4), with at least two Inductors (5) arranged on both sides of the metal strand (1) in the region of the guide channel (4) for generating an electromagnetic field for retaining the coating metal (2) in the container (3), in particular for carrying out the method according to one of claims 1 to 4 by at least one supply line (6, 7, 8, 9) for supplying a predetermined volume flow (Q) of coating metal (2) which opens into the guide channel (4) in the region of the vertical extent (H) thereof.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Zuführleitung (6, 7) in den Bereich der Längsseite (11) des Führungskanals (4) mündet.6. The device according to claim 5, characterized in that the feed line (6, 7) opens into the region of the longitudinal side (11) of the guide channel (4).
7. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Zuführleitung (8, 9) in den Bereich der Stirnseite (10) des Führungskanals (4) mündet.7. The device according to claim 5, characterized in that the feed line (8, 9) opens into the region of the end face (10) of the guide channel (4).
8. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die Breite (B) bzw. der Durchmesser der Zuführleitung (6, 7, 8, 9) im8. Device according to one of claims 5 to 7, characterized in that the width (B) or the diameter of the feed line (6, 7, 8, 9) in
Verhältnis zu der Abmessung der Längsseite (11) des Führungskanals (4) klein ist.Ratio to the dimension of the long side (11) of the guide channel (4) is small.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Breite (B) bzw. der Durchmesser der Zuführleitung (6, 7, 8, 9) höchstens 10 % der Breite der Längsseite (11) des Führungskanals (4) beträgt.9. The device according to claim 8, characterized in that the width (B) or the diameter of the feed line (6, 7, 8, 9) is at most 10% of the width of the long side (11) of the guide channel (4).
10. Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass der Beschichtungsbehälter (3) mit einem Versorgungssystem (12) für Beschichtungsmetall (2) in Verbindung steht, von dem aus Beschichtungsmetall (2) in die Zuführleitung bzw. in die Zuführleitungen (6, 7, 8, 9) geleitet wird. 10. Device according to one of claims 5 to 9, characterized in that the coating container (3) with a supply system (12) for coating metal (2) is connected, from which coating metal (2) in the feed line or in the feed lines (6, 7, 8, 9).
EP04721491A 2003-04-09 2004-03-18 Method and device for coating a metal bar by hot dipping Expired - Lifetime EP1611263B1 (en)

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WO2004090189A1 (en) 2004-10-21
AR043843A1 (en) 2005-08-17
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DE502004001733D1 (en) 2006-11-23
CN1771347A (en) 2006-05-10
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DE10316137A1 (en) 2004-10-28
EP1611263B1 (en) 2006-10-11

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