EP1563114A2 - Dispositif d'enduction par immersion a chaud d'une barre metallique - Google Patents

Dispositif d'enduction par immersion a chaud d'une barre metallique

Info

Publication number
EP1563114A2
EP1563114A2 EP03815270A EP03815270A EP1563114A2 EP 1563114 A2 EP1563114 A2 EP 1563114A2 EP 03815270 A EP03815270 A EP 03815270A EP 03815270 A EP03815270 A EP 03815270A EP 1563114 A2 EP1563114 A2 EP 1563114A2
Authority
EP
European Patent Office
Prior art keywords
metal
coating
guide channel
metal strand
flaps
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
EP03815270A
Other languages
German (de)
English (en)
Other versions
EP1563114B1 (fr
Inventor
Rolf Brisberger
Bodo Falkenhahn
Holger Behrens
Michael Zielenbach
Bernhard Tenckhoff
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 EP1563114A2 publication Critical patent/EP1563114A2/fr
Application granted granted Critical
Publication of EP1563114B1 publication Critical patent/EP1563114B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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

Definitions

  • the invention relates to a device 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, with at least two inductors arranged on both sides of the metal strand in the region of the guide channel for generating an electromagnetic Field to retain the coating metal in the container.
  • the strips are introduced into the dip coating bath from above in an immersion nozzle. Since the coating metal is in liquid form and you want to use gravitation together with blow-off devices to adjust the coating thickness, but the subsequent processes prohibit contact with the strip until the coating metal has completely solidified, the strip in the coating vessel must be vertical Direction to be redirected. 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.
  • EP 0 630 421 B1 provides a constriction for this below the guide channel, from which a pipeline leads to a reservoir for molten coating metal. This document does not provide any further details on the design of this device, which is referred to as a backstop.
  • JP 2000273602 A discloses a collecting trough below the guide channel, which is intended to hold coating metal that runs down through the guide channel. This is led to a container, from where it is returned to the coating bath via a pump. Here, too, no concrete and specific information is given on how to collect leaking coating metal.
  • EP 0 855 450 B1 deals more closely with the question of how the tightness of the lower region of the guide channel can be ensured.
  • various alternative solutions are disclosed here.
  • two slides which are arranged on both sides of the metal strand, can be moved perpendicular to the surface of the metal strand.
  • the slides act as sealing plugs and are kept in contact with the metal strand if necessary to prevent liquid from escaping down through the guide channel.
  • a relatively complex control of the slide is required to ensure their function.
  • Another embodiment provides that a conveyor belt is used which conveys emerging coating metal from the area below the guide channel into a collecting container.
  • this solution is very complex and involves the risk that the strip will become clogged with coating metal over time and thus can no longer perform its function.
  • a third alternative solution for preventing the escape of molten coating metal is provided by a gas nozzle system.
  • a gas flow is directed from below onto the guide channel, which exits the coating Tear the metal upwards and thus seal its opening downwards.
  • This solution is also very complex and only of limited practical use.
  • the invention has for its object to provide a device for hot-dip coating a metal strand, with which it is possible to easily ensure reliable operation of the system even in critical operating conditions, for example when the power supply to the inductors is interrupted.
  • the solution to this problem by the invention is characterized by at least two flaps arranged on both sides of the metal strand and below the guide channel and designed as liquid baffles, optionally in an open position in which they have no contact with the metal strand or in a closed position which they are attached to the metal strand, can be positioned.
  • the concept of the invention is based on the fact that by means of two flaps which can be placed on the metal strand and are arranged below the guide channel, if necessary, for example in the event of a power failure in which the inductors no longer work, the melted melt flowing out of the guide channel Coating metal can be collected so that no damage to the coating device or economic loss occurs.
  • a first development is based on the fact that the flaps are arranged to be pivotable about an axis of rotation; the axis of rotation is preferably arranged parallel to the plane of the metal strand and perpendicular to the conveying direction of the metal strand.
  • the flaps can be equipped with manual actuation means, in particular for pivoting about the axis of rotation; alternatively, the flaps are connected to pneumatic actuators or hydraulic actuators.
  • Each flap advantageously has a collecting area for molten coating metal. It has proven to be particularly advantageous if the collecting area is fluidly connected to a storage container for molten coating metal.
  • the storage container is preferably arranged below the flaps.
  • the fluidic connection between the collecting area and the reservoir can be formed by a pipe section.
  • FIG. 1 An embodiment of the invention is shown.
  • the single figure shows schematically a hot-dip coating device with a metal strand passed through it.
  • the device has a container 3 which is filled with molten coating metal 2.
  • 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. For the passage of the metal strand 1 through the container 3, it is open in the bottom area; here is an exaggerated guide channel 4.
  • the inductors 5 are two alternating field or traveling field inductors arranged opposite one another, which operate in the frequency range from 2 Hz to 10 kHz are operated and build up a transverse electromagnetic field perpendicular to the conveying direction R.
  • the preferred frequency range for single-phase systems (alternating 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.
  • two flaps 6 are arranged below the guide channel 4 on both sides of the metal strand 1.
  • the flaps 6 can assume an open position A in which they have no contact with the metal strand 1. This is shown in the right half of the figure. You can also assume a closed position B, in which they are applied to the metal strand 1; this position is illustrated in the left half of the figure.
  • the open position A corresponds to the normal operation of the coating system.
  • the inductors 5 retain the closed coating metal 2 in the guide channel 4, so that the flaps 6 do not have to perform any function.
  • the flaps 6 are brought into their closed position B.
  • the flaps 6 act as liquid baffles and, after they have been applied to the metal strand 1, guide the molten coating metal 2 into a collecting area 8, where it can be collected.
  • the collecting area 8 is in fluid communication with a pipe section 10. About this collected coating metal is passed down into a storage container 9, where it can be safely received.
  • the flaps 6 are pivotable about an axis of rotation 7 which is perpendicular to the plane of the drawing.
  • Manual, hydraulic or pneumatic actuation means (not shown) are provided for pivoting, which, if necessary, in particular in the event of a power failure, bring about the flaps 6 being flipped from the open position A to the closed position B.
  • the proposed design provides a particularly simple and therefore inexpensive, but nevertheless a very efficient possibility of collecting coating metal 2 emerging through the guide channel 4 in the event of a malfunction and thus preventing damage to the coating device and economic disadvantages due to loss of coating metal.

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

L'invention concerne un dispositif d'enduction par immersion à chaud d'une barre métallique (1), notamment d'une bande d'acier. Dans ce dispositif, la barre métallique (1) traverse à la verticale un réservoir (3) contenant le métal d'enduction fondu (2) et un canal de guidage (4) en amont, au moins deux inducteurs (5) étant disposés de chaque côté de la barre métallique (1) dans la zone du canal de guidage (4) pour générer un champ électromagnétique qui retient le métal d'enduction (2) dans le réservoir (3). L'invention vise à collecter le métal d'enduction fondu de manière simple, notamment en cas d'urgence. A cet effet, le dispositif de l'invention est équipé d'au moins deux volets (6) montés de chaque côté de la barre métallique (1) sous le canal de guidage (4) et formant des déflecteurs pour le liquide. Lorsqu'ils sont en position ouverte (A), ces volets ne se trouvent pas en contact avec la barre métallique (1) et lorsqu'ils sont en position fermée (B), ils appuient contre la barre métallique (1).
EP03815270A 2002-11-15 2003-10-18 Dispositif d'enduction par immersion a chaud d'une barre metallique Expired - Lifetime EP1563114B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10253234A DE10253234A1 (de) 2002-11-15 2002-11-15 Vorrichtung zur Schmelztauchbeschichtung eines Metallstranges
DE10253234 2002-11-15
PCT/EP2003/011577 WO2004067795A2 (fr) 2002-11-15 2003-10-18 Dispositif d'enduction par immersion à chaud d'une barre métallique

Publications (2)

Publication Number Publication Date
EP1563114A2 true EP1563114A2 (fr) 2005-08-17
EP1563114B1 EP1563114B1 (fr) 2008-07-30

Family

ID=32185696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03815270A Expired - Lifetime EP1563114B1 (fr) 2002-11-15 2003-10-18 Dispositif d'enduction par immersion a chaud d'une barre metallique

Country Status (8)

Country Link
EP (1) EP1563114B1 (fr)
AT (1) ATE403017T1 (fr)
AU (1) AU2003303292A1 (fr)
DE (2) DE10253234A1 (fr)
ES (1) ES2309401T3 (fr)
MY (1) MY131243A (fr)
TW (1) TWI290590B (fr)
WO (1) WO2004067795A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208578A1 (de) * 1992-03-13 1993-09-16 Mannesmann Ag Verfahren zum beschichten der oberflaeche von strangfoermigem gut
CA2225537C (fr) * 1996-12-27 2001-05-15 Mitsubishi Heavy Industries, Ltd. Dispositif et methode de revetement metallique a chaud
JPH1143754A (ja) * 1997-07-23 1999-02-16 Nisshin Steel Co Ltd 溶融めっき金属の流下防止機構を備えた空中ポット
DE10212436B4 (de) * 2002-03-21 2005-03-03 Sms Demag Ag Vorrichtung zur Behandlung von strangförmigem metallischen Gut und ihre Verwendung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004067795A3 *

Also Published As

Publication number Publication date
ATE403017T1 (de) 2008-08-15
MY131243A (en) 2007-07-31
TW200412377A (en) 2004-07-16
WO2004067795A3 (fr) 2004-12-29
ES2309401T3 (es) 2008-12-16
DE10253234A1 (de) 2004-05-27
DE50310259D1 (de) 2008-09-11
AU2003303292A8 (en) 2004-08-23
EP1563114B1 (fr) 2008-07-30
WO2004067795A2 (fr) 2004-08-12
AU2003303292A1 (en) 2004-08-23
TWI290590B (en) 2007-12-01

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