EP2766511A1 - Device and method for post-treating a metal strip - Google Patents

Device and method for post-treating a metal strip

Info

Publication number
EP2766511A1
EP2766511A1 EP12772925.9A EP12772925A EP2766511A1 EP 2766511 A1 EP2766511 A1 EP 2766511A1 EP 12772925 A EP12772925 A EP 12772925A EP 2766511 A1 EP2766511 A1 EP 2766511A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
rinsing
zone
spray
mist
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
EP12772925.9A
Other languages
German (de)
French (fr)
Other versions
EP2766511B1 (en
Inventor
Stefan Hoedl
Josef Speidl
Klaus Kofler
Alois Stadlbauer
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.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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 Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Priority to EP12772925.9A priority Critical patent/EP2766511B1/en
Publication of EP2766511A1 publication Critical patent/EP2766511A1/en
Application granted granted Critical
Publication of EP2766511B1 publication Critical patent/EP2766511B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
    • C23G3/029—Associated apparatus, e.g. for pretreating or after-treating for removing the pickling fluid from the objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/041—Cleaning travelling work

Definitions

  • the invention relates to an apparatus and a method for the post-treatment of a metal strip, which from a
  • Beizzone coming stained metal strip is moved in a continuous operation through a rinsing zone, in which adhering to the surface of the metal strip residues of a
  • Beizstoffs be removed by spraying a rinsing liquid.
  • Pickling process is followed by a zone of after-treatment, in which the metal strip is cleaned of residues of the pickling agent. Typically, this takes place in a rinsing zone, which usually consists of several rinsing stages. Above and below the metal strip, flushing nozzles are provided in the flushing stages, which spray a flushing liquid onto the surfaces of the metal strip. The detergent is usually recycled.
  • water is used as a rinse, which may also include chemical additives.
  • Ribbon surface come.
  • "Spray pictures” are irregularities on the surface of the metal strip, which affect the quality of the pickled metal strip and are undesirable. These “spray patterns” are caused, for example, by the fact that the spray jet hits only a limited area of the surface during the belt stoppage.
  • Irregularities e.g. brown spots. These brown ones
  • Atmosphere kept. This is done by a
  • Liquid mist is generated, whereby the surface of the metal strip is moistened and the atmospheric oxygen does not reach the metal surface.
  • the liquid mist is removed by suitable means, e.g. produced by atomizing nozzles. This process is also referred to below as standstill spraying.
  • a device for generating a liquid mist in the rinsing zone, a device for generating a liquid mist is provided, by means of which, in the event of an interruption of the continuous operation or greatly reduced belt speed, the surface of the metal strip is moistened.
  • the device for generating the liquid mist is separated from the rinsing nozzles and consists essentially of separate nozzles, hereinafter also referred to as spray nozzles.
  • the invention has the advantage that with
  • a rinsing zone usually consists of several rinsing stages, the misting of the band takes place in the individual rinsing stages. As a result, the problem of the standstill-induced (or greatly reduced belt speed) surface impairment can be solved with comparatively little effort. It is envisaged to provide in at least one or each of the rinsing stages the moistening of the respective band section according to the invention. In a preferred embodiment it is provided that the
  • Means for generating the liquid mist is arranged in each case on the side walls of a rinsing stage. As a result, the liquid mist each side of the
  • the spray nozzles either in a through the pass line of the
  • Metal band predetermined plane, or in levels above and below the front side of the band (pass line) are arranged and their spray is directed transversely to the direction of tape travel. As a result, the distribution of the mist in the interior of the rinsing stages can be carried out uniformly.
  • the present object is also achieved by a process for the aftertreatment of a metal strip, wherein the pickled from a pickling zone pickled metal strip is moved in a continuous operation through a rinsing zone, in which adhering to the surface of the metal strip remains a
  • the method according to the invention is characterized in that, in the event of an interruption of the continuous operation or in the case of greatly reduced belt movement, the spraying of the rinsing liquid is stopped zone-wise or completely and provided by means provided in the rinsing zone Setup a liquid mist is generated, and thus the surface of the metal strip is kept moist.
  • Standstill spraying is performed. During the
  • Standstill spraying can be the application of the
  • Rinsing liquid are switched off while running tape.
  • this special nozzles are used, which are arranged laterally in the rinsing stage.
  • a uniform moistening of the strip surface can be achieved if the (mist) spray nozzles either in a predetermined by the passline of the metal strip level or in levels above and below the passline
  • the spray direction is given transversely to the direction of tape travel of the metal strip.
  • Figure 1 is a schematic representation of a
  • Treatment plant for metal strips consisting of a pickling zone and a subsequent rinsing zone consisting of several rinsing stages;
  • Figure 2a and 2b is a cross-sectional view of a
  • FIG. 1 shows a schematic representation of a
  • the treatment plant 1 for metal strips.
  • the treatment plant 1 consists essentially of a pickling zone 3 and a subsequent rinsing zone 4, in which the pickled metal strip 2 is aftertreated.
  • the metal strip 2 is guided in Figure 1 according to the arrow 5 from left to right along the pass line 6 through the treatment plant 1.
  • Rinsing zone 4 consists in the example shown of three
  • At least in one of the rinsing stages 7 is located
  • a liquid for example, deionized water is used.
  • Rinse stage 7 are squeezing rollers 10, which the squeezing the respective treatment liquid from the strip surface 14 and thus retaining it in the respective strip treatment zone.
  • FIGS. 2 a and 2 b show a cross section through a rinsing stage 7.
  • the rinsing nozzles 11 serve to spray the surface of the metal strip 14 with a rinsing agent, so that residues of the dressing agent are removed from the strip surface 14.
  • the flushing nozzles 11 are connected via supply lines to a supply device, not shown.
  • the detergent is collected in a tub as a template and recycled.
  • a spray nozzle row 13 is shown in each case at the height of the pass line on the side walls.
  • FIG. 2b two spray nozzle rows 13 per side are shown above and below the pass line. They represent a nebulizer, by means of which a liquid (usually pure water) is atomized into mist.
  • This liquid mist 9 is introduced into the interior of the rinsing stage 7 from the side.
  • the supply of the rinsing liquid to the rinsing nozzles 11 is zone-wise or completely stopped.
  • the spray nozzles 13 are lined up in the direction of tape 5 seen on a line that is either approximately equal to the pass line 6 of the rinse zone 7 (Figure 2a) or above and below the pass line ( Figure 2b) are arranged.
  • Spray jet 15 shows transversely to the strip running direction 5.
  • a preferred embodiment of the spray nozzles 13 may be either a single-fluid nozzle (e.g., Vollkep sodase) or a
  • a rinsing zone 4 also consist of more than three rinsing stages 7 connected in series.
  • the problem of "spray patterns" occurs with belt stoppage or the problem of undesired discoloration in the case of belt stoppage or, greatly reduced

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A device and method for post-treating a metal strip, wherein the pickled metal strip (2) coming from a pickling zone is moved in continuous operation through a rinsing zone (4) in which residues of a pickling agent adhering to the surface (11) of the metal strip (2) are removed by spraying the metal strip with rinsing fluid, wherein at least one device (8) for generating a liquid mist (9) is provided in the rinsing zone (4), by means of which device (8) the surface (14) of the metal strip (2) can be moistened in the event of an interruption of the continuous operation or of a sharply reduced speed of the strip.

Description

Vorrichtung und Verfahren zur Nachbehandlung eines Metallbandes Apparatus and method for the aftertreatment of a metal strip
Technisches Gebiet Technical area
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Nachbehandlung eines Metallbandes, wobei das aus einer The invention relates to an apparatus and a method for the post-treatment of a metal strip, which from a
Beizzone kommende gebeizte Metallband im Durchlaufbetrieb durch eine Spülzone hindurch bewegt wird, in welcher an der Oberfläche des Metallbandes anhaftende Reste eines Beizzone coming stained metal strip is moved in a continuous operation through a rinsing zone, in which adhering to the surface of the metal strip residues of a
Beizmittels durch Aufsprühen einer Spülflüssigkeit entfernt werden . Beizmittels be removed by spraying a rinsing liquid.
Stand der Technik State of the art
Es ist bekannt, zum Entfernen von Zunder von einem Metallband die Oberfläche mit einem Beizmittel zu behandeln, z.B. mit einer Säure. Dabei wird das Metallband im Durchlaufbetrieb kontinuierlich durch eine Beizzone hindurch bewegt. Dem It is known to treat the surface with a mordant to remove scale from a metal strip, e.g. with an acid. The metal strip is continuously moved in continuous operation through a pickling zone. the
Beizvorgang schließt sich eine Zone der Nachbehandlung an, in welcher das Metallband von Resten des Beizmittels gereinigt wird. Typischerweise erfolgt dies in einer Spülzone, die meist aus mehreren Spülstufen besteht. Oberhalb und unterhalb des Metallbandes sind in den Spülstufen Spüldüsen vorgesehen, die eine Spülflüssigkeit auf die Oberflächen des Metallbandes sprühen. Das Spülmittel wird meist im Kreislauf geführt. Pickling process is followed by a zone of after-treatment, in which the metal strip is cleaned of residues of the pickling agent. Typically, this takes place in a rinsing zone, which usually consists of several rinsing stages. Above and below the metal strip, flushing nozzles are provided in the flushing stages, which spray a flushing liquid onto the surfaces of the metal strip. The detergent is usually recycled.
Üblicherweise wird Wasser als Spülmittel verwendet, das auch chemische Zusätze beinhalten kann. Usually, water is used as a rinse, which may also include chemical additives.
Betriebsbedingt kann es zu Unterbrechungen des durchlaufenden Betriebs kommen. Wird die Bewegung des Metallbandes in einer Spülzone gestoppt oder stark reduziert (stark reduzierteDue to operational reasons, interruptions of continuous operation may occur. If the movement of the metal strip in a rinsing zone is stopped or greatly reduced (greatly reduced
Bandgeschwindigkeit) , so kann es zur Ausbildung so genannter "Sprühbilder" und zu unerwünschten Verfärbungen an der Belt speed), so it can be used to form so-called "spray patterns" and undesired discoloration on the
Bandoberfläche kommen . "Sprühbilder" sind Unregelmäßigkeiten an der Oberfläche des Metallbandes, welche die Qualität des gebeizten Metallbandes beeinträchtigen und unerwünscht sind. Verursacht werden diese "Sprühbilder" beispielsweise dadurch, dass der Sprühstrahl während des Bandstillstands nur auf einen begrenzten Bereich der Oberfläche auftrifft. Ribbon surface come. "Spray pictures" are irregularities on the surface of the metal strip, which affect the quality of the pickled metal strip and are undesirable. These "spray patterns" are caused, for example, by the fact that the spray jet hits only a limited area of the surface during the belt stoppage.
Aber auch dann, wenn der Spülvorgang während des Stillstandes abgeschaltet wird, trocknet die auf dem Band befindliche Restmenge der Spülflüssigkeit aufgrund der Bandtemperatur von bis zu 80°C auf. Es entstehen auf der Oberfläche But even if the rinsing process is switched off during standstill, the residual amount of the rinsing liquid located on the belt dries due to the belt temperature of up to 80 ° C. It arises on the surface
Unregelmäßigkeiten, z.B. braune Flecken. Diese braunen  Irregularities, e.g. brown spots. These brown ones
Flecken werden durch eine an der Oberfläche stattfindende Eisen-III-Hydroxid-Bildung hervorgerufen. Eisen-III-Hydroxid ist im Wasser nicht löslich. Spots are caused by superficial iron (III) hydroxide formation. Ferric hydroxide is insoluble in water.
Aus AT 404 472 B ist ein Verfahren zur Nachbehandlung von gebeiztem Stahlband bekannt, bei dem im Falle eines Anlagen- Stillstandes das Metallband in der Spülzone geflutet wird. Eine solche Flutung, die bis zur vollen Bandüberdeckung erfolgen muss, ist aufwändig. From AT 404 472 B a process for the aftertreatment of pickled steel strip is known in which, in the event of a plant downtime, the metal strip is flooded in the rinsing zone. Such flooding, which must take place up to the full band coverage, is complicated.
Man kann obigem Problem auch dadurch begegnen, indem man nach einem Bandstillstand das betroffene Bandstück wieder zurück in die Beizzone fährt. Dadurch wird die Braunfärbung One can also counteract the above problem by driving the affected piece of tape back into the pickling zone after a tape stop. This turns the brown coloration
abgebeizt und so entfernt. Ein solcher Vorgang erfordert die Umkehr der Bewegungsrichtung des Bandes, was die Ausbringung verringert pickled and so removed. Such a process requires the reversal of the direction of movement of the belt, which reduces the output
Insgesamt ist das Problem der stillstandsbedingten Overall, the problem is the standstill
Beeinträchtigung der Oberflächenqualität eines gebeizten Metallbandes bislang nicht zufriedenstellend gelöst. Impairment of the surface quality of a pickled metal strip so far not satisfactorily solved.
Darstellung der Erfindung Presentation of the invention
Es ist Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren zur Nachbehandlung eines gebeizten It is an object of the present invention, an apparatus and a method for the aftertreatment of a pickled
Metallbandes anzugeben, so dass im Falle einer Unterbrechung des Durchlaufbetriebs oder stark reduzierter Specify metal strip so that in case of interruption of continuous operation or greatly reduced
Bandgeschwindigkeit eine hohe Oberflächenqualität des Belt speed a high surface quality of
Metallbandes beibehalten wird, ohne das das Band Metal strip is retained without the tape
zurückgezogen werden muss. must be withdrawn.
Gelöst wird diese Aufgabe bezüglich einer Vorrichtung mit den Merkmalen des Anspruchs 1 und bezüglich eines Verfahrens mit den Merkmalen des Anspruchs 9. Gemäß dem Grundgedanken der Erfindung wird das Metallband im Falle eines Bandstillstands oder bei stark reduzierter This object is achieved with respect to a device having the features of claim 1 and with respect to a method having the features of claim 9. According to the basic idea of the invention, the metal strip in the case of a belt stoppage or at greatly reduced
Bandgeschwindigkeit in der Spülzone in einer feuchten Belt speed in the rinsing zone in a moist
Atmosphäre gehalten. Dies erfolgt dadurch, indem ein Atmosphere kept. This is done by a
Flüssigkeitsnebel erzeugt wird, womit die Oberfläche des Metallbandes befeuchtet wird und der Luftsauerstoff nicht an die Metalloberfläche gelangt. Der Flüssigkeitsnebel wird mittels geeigneter Einrichtungen, z.B. durch Zerstäubungs- Düsen erzeugt. Dieser Vorgang wird im Folgenden auch als Stillstandsbedüsung bezeichnet. Die erfindungsgemäße Liquid mist is generated, whereby the surface of the metal strip is moistened and the atmospheric oxygen does not reach the metal surface. The liquid mist is removed by suitable means, e.g. produced by atomizing nozzles. This process is also referred to below as standstill spraying. The inventive
Vorrichtung zur Nachbehandlung ist also dadurch Device for post-treatment is thus characterized
gekennzeichnet, dass in der Spülzone eine Einrichtung zum Erzeugen eines Flüssigkeitsnebels vorgesehen ist, mittels dessen im Falle einer Unterbrechung des Durchlaufbetriebs oder stark reduzierter Bandgeschwindigkeit die Oberfläche des Metallbandes befeuchtbar ist. Die Einrichtung zum Erzeugen des Flüssigkeitsnebels ist von den Spüldüsen getrennt und besteht im Wesentlichen aus separaten Düsen, im Folgenden auch als Sprühdüsen bezeichnet. Durch das Einnebeln mit einer Flüssigkeit (z.B.: VE-Wasser) bleibt die Oberfläche des characterized in that in the rinsing zone, a device for generating a liquid mist is provided, by means of which, in the event of an interruption of the continuous operation or greatly reduced belt speed, the surface of the metal strip is moistened. The device for generating the liquid mist is separated from the rinsing nozzles and consists essentially of separate nozzles, hereinafter also referred to as spray nozzles. By misting with a liquid (e.g., deionized water) remains the surface of the
Metallbandes während eines Stillstandes oder stark Metal band during a standstill or hard
reduzierter Bandgeschwindigkeit feucht. Im Falle des reduced belt speed damp. In the case of
Stillstandes hat die Erfindung den Vorteil, dass mit Standstill, the invention has the advantage that with
vergleichsweise geringem Aufwand begrenzte Stillstandszeiten der Anlage ohne Bandrückzug und ohne Qualitätseinbußen überbrückt werden können. Durch den Wegfall des Zurückziehens des Bandes kann diese Zeit für die Produktion genutzt werden. Dies erhöht die Effizienz der Anlage. Da eine Spülzone üblicherweise aus mehreren Spülstufen besteht, erfolgt das Einnebeln des Bandes in den einzelnen Spülstufen. Dadurch kann mit vergleichsweise geringem Aufwand das Problem der stillstandsbedingten (oder stark reduzierter Bandgeschwindigkeit) Oberflächenbeeinträchtigung gelöst werden. Es ist vorgesehen, in zumindest einer oder jeder der Spülstufen die erfindungsgemäße Befeuchtung des jeweiligen Bandabschnittes vorzusehen. In einer bevorzugten Ausführung ist vorgesehen, dass diecomparatively little effort limited downtime of the system without belt retraction and can be bridged without loss of quality. By eliminating the withdrawal of the tape, this time can be used for production. This increases the efficiency of the system. Since a rinsing zone usually consists of several rinsing stages, the misting of the band takes place in the individual rinsing stages. As a result, the problem of the standstill-induced (or greatly reduced belt speed) surface impairment can be solved with comparatively little effort. It is envisaged to provide in at least one or each of the rinsing stages the moistening of the respective band section according to the invention. In a preferred embodiment it is provided that the
Einrichtung zum Erzeugen des Flüssigkeitsnebels jeweils an den Seitenwänden einer Spülstufe angeordnet ist. Dadurch tritt der Flüssigkeitsnebel jeweils seitlich aus den Means for generating the liquid mist is arranged in each case on the side walls of a rinsing stage. As a result, the liquid mist each side of the
Seitenwänden in den Innenraum der jeweiligen Spülstufe ein. Dies führt zu einer gleichmäßigen Verteilung des Nebels im Innenraum. Side walls in the interior of the respective rinsing a. This leads to a uniform distribution of the fog in the interior.
Um eine möglichst gleichmäßige Befeuchtung der Oberfläche des Metallbandes zu erreichen, kann es ferner günstig sein, wenn die Sprühdüsen entweder in einer durch die Passlinie desIn order to achieve a uniform possible moistening of the surface of the metal strip, it may also be advantageous if the spray nozzles either in a through the pass line of the
Metallbandes vorgegebenen Ebene, oder in Ebenen oberhalb und unterhalb der Stirnseite des Bandes (Passline) angeordnet sind und ihr Sprühstrahl quer zur Bandlaufrichtung gerichtet ist. Dadurch kann die Verteilung des Nebels im Innenraum der Spülstufen gleichmäßig durchgeführt werden. Metal band predetermined plane, or in levels above and below the front side of the band (pass line) are arranged and their spray is directed transversely to the direction of tape travel. As a result, the distribution of the mist in the interior of the rinsing stages can be carried out uniformly.
Die vorliegende Aufgabe wird auch durch ein Verfahren zur Nachbehandlung eines Metallbandes gelöst, wobei das aus einer Beizzone kommende gebeizte Metallband im Durchlaufbetrieb durch eine Spülzone hindurch bewegt wird, in welcher an der Oberfläche des Metallbandes anhaftende Reste eines The present object is also achieved by a process for the aftertreatment of a metal strip, wherein the pickled from a pickling zone pickled metal strip is moved in a continuous operation through a rinsing zone, in which adhering to the surface of the metal strip remains a
Beizmittels entfernt werden. Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, dass im Falle einer Unterbrechung des Durchlaufbetriebs oder bei stark reduzierter Bandbewegung das Aufsprühen der Spülflüssigkeit zonenweise oder ganz gestoppt wird und mittels einer in der Spülzone vorgesehenen Einrichtung ein Flüssigkeitsnebel erzeugt wird, und damit die Oberfläche des Metallbandes feucht gehalten wird. Beizmittels be removed. The method according to the invention is characterized in that, in the event of an interruption of the continuous operation or in the case of greatly reduced belt movement, the spraying of the rinsing liquid is stopped zone-wise or completely and provided by means provided in the rinsing zone Setup a liquid mist is generated, and thus the surface of the metal strip is kept moist.
Erfahrungsgemäß können bei Bandstillstand oder stark Experience has shown that band stops or strong
reduzierter Bandgeschwindigkeit die unerwünschten Sprühbilder und Verfärbungen in jeder Spülstufe auftreten. Bei der Reduced belt speed the unwanted spray patterns and discoloration occur in each rinse stage. In the
Vermeidung dieser Beeinträchtigungen ist es daher besonders effizient, wenn zumindest in einer Spülstufe eine Avoiding these impairments, it is therefore particularly efficient if at least one rinsing step
Stillstandbedüsung durchgeführt wird. Während des Standstill spraying is performed. During the
Stillstandbedüsungsbestriebes kann das Aufbringen der Standstill spraying can be the application of the
Spülflüssigkeit unter Bandlauf abgeschaltet werden. Rinsing liquid are switched off while running tape.
Für die Einbringung des Flüssigkeitsnebels kann es günstig sein, wenn hierfür spezielle Düsen verwendet werden, die seitlich in der Spülstufe angeordnet sind. For the introduction of the liquid mist, it may be advantageous if this special nozzles are used, which are arranged laterally in the rinsing stage.
Hierbei ist es günstig, wenn die Sprühdüsen in den It is advantageous if the spray nozzles in the
Seitenwänden der Spülstufe integriert sind. Die Befeuchtung kann dadurch homogen über die Bandoberfläche erfolgen.  Side walls of the rinse stage are integrated. The moistening can thus be carried out homogeneously over the strip surface.
Eine gleichmäßige Befeuchtung der Bandoberfläche kann dadurch erzielt werden, wenn die (Nebel-) Sprühdüsen entweder in einer durch die Passline des Metallbandes vorgegebenen Ebene oder in Ebenen oberhalb und unterhalb der Passline A uniform moistening of the strip surface can be achieved if the (mist) spray nozzles either in a predetermined by the passline of the metal strip level or in levels above and below the passline
nebeneinander angeordnet werden und die Sprührichtung quer zur Bandlaufrichtung des Metallbandes gegeben ist. are arranged side by side and the spray direction is given transversely to the direction of tape travel of the metal strip.
Kurzbeschreibung der Zeichnung Brief description of the drawing
Zur weiteren Erläuterung der Erfindung werden im For further explanation of the invention are in
nachfolgenden Teil der Beschreibung auf die Zeichnungen Bezug genommen, aus denen weitere vorteilhafte Ausgestaltungen, Einzelheiten und Weiterbildungen der Erfindung, anhand nicht einschränkender Ausführungsbeispiele zu entnehmen sind. Es zeigen: the following part of the description with reference to the drawings, from which further advantageous embodiments, details and developments of the invention, based on non-limiting embodiments can be found. Show it:
Figur 1 eine schematische Darstellung einer Figure 1 is a schematic representation of a
Behandlungsanlage für Metallbänder, bestehend aus einer Beizzone und einer sich daran anschließenden Spülzone, die aus mehreren Spülstufen besteht;  Treatment plant for metal strips, consisting of a pickling zone and a subsequent rinsing zone consisting of several rinsing stages;
Figur 2a und 2b eine Querschnittsdarstellung einer Figure 2a and 2b is a cross-sectional view of a
Spülstufe .  Rinse stage.
Ausführung der Erfindung Embodiment of the invention
Die Figur 1 zeigt eine schematische Darstellung einer FIG. 1 shows a schematic representation of a
Behandlungsanlage 1 für Metallbänder. Die Behandlungsanlage 1 besteht im Wesentlichen aus einer Beizzone 3 und einer sich daran anschließenden Spülzone 4, in welcher das gebeizte Metallband 2 nachbehandelt wird. Das Metallband 2 wird in Figur 1 gemäß dem Pfeil 5 von links nach rechts längs der Passlinie 6 durch die Behandlungsanlage 1 geführt. Die Treatment plant 1 for metal strips. The treatment plant 1 consists essentially of a pickling zone 3 and a subsequent rinsing zone 4, in which the pickled metal strip 2 is aftertreated. The metal strip 2 is guided in Figure 1 according to the arrow 5 from left to right along the pass line 6 through the treatment plant 1. The
Spülzone 4 besteht im dargestellten Beispiel aus drei Rinsing zone 4 consists in the example shown of three
hintereinander geschalteten Spülstufen 7 in denen jeweils nicht näher dargestellte Spüldüsen 11 eine Spülflüssigkeit auf die Oberseite und auf die Unterseite des Metallbandes 2 aufsprühen und dadurch die aus der Beizzone 3 mitgeschleppten Reste des Beizmittels von der Bandoberfläche 14 entfernen. one after the other rinse steps 7 in each of which rinsing liquid 11 not shown spray a rinsing liquid on the top and on the underside of the metal strip 2 and thereby remove the entrained from the pickling zone 3 remnants of the pickling agent from the strip surface 14.
Zumindest in einer der Spülstufen 7 befindet sich At least in one of the rinsing stages 7 is located
erfindungsgemäß eine Einrichtung 8 zum Erzeugen eines According to the invention, a device 8 for generating a
Flüssigkeitsnebels 9 mit dem bei Bandstillstand oder Liquid mist 9 with the band stop or
reduzierter Bandgeschwindigkeit der in dieser Spülstufe 7 befindlicher Abschnitt des Metallbandes 2 befeuchtet wird. Zum Erzeugen des Nebels 9 wird eine Flüssigkeit z.B.: VE- Wasser verwendet. reduced belt speed of befindlicher in this rinse stage 7 portion of the metal strip 2 is moistened. For generating the mist 9, a liquid, for example, deionized water is used.
Jeweils am Eingang und am Ausgang der Beizzone 3 In each case at the entrance and at the exit of the pickling zone 3
beziehungsweise am Eingang und am Ausgang einer jeden or at the entrance and the exit of each
Spülstufe 7 befinden sich Abquetschrollen 10, welche die jeweilige Behandlungsflüssigkeit von der Bandoberfläche 14 abquetschen und so in der jeweiligen Bandbehandlungszone zurückhalten . Rinse stage 7 are squeezing rollers 10, which the squeezing the respective treatment liquid from the strip surface 14 and thus retaining it in the respective strip treatment zone.
Die Figuren 2a und 2b zeigen einen Querschnitt durch eine Spülstufe 7. Die Spüldüsen 11 dienen dazu, die Oberfläche des Metallbandes 14 mit einem Spülmittel zu besprühen, so dass Reste des Beizmittels von der Bandoberfläche 14 entfernt werden. Die Spüldüsen 11 sind über Versorgungsleitungen mit einer nicht näher dargestellten Versorgungseinrichtung verbunden. Das Spülmittel wird in einer Wanne als Vorlage aufgefangen und im Kreislauf geführt. In Figur 2a ist jeweils eine Sprühdüsenreihe 13 in der Höhe der Passlinie an den Seitenwänden dargestellt. In Figur 2b werden jeweils zwei Sprühdüsenreihen 13 pro Seite oberhalb und unterhalb der Passlinie dargestellt. Sie stellen eine Zerstäubungseinrichtung dar, mittels derer eine Flüssigkeit (in der Regel reines Wasser) zu Nebel zerstäubt wird. Dieser Flüssigkeitsnebel 9 wird in den Innenraum der Spülstufe 7 von der Seite her eingebracht. Im Falle eines Bandstillstandes oder stark reduzierter Bandgeschwindigkeit (die Zufuhr der Spülflüssigkeit zu den Spüldüsen 11 ist zonenweise oder ganz gestoppt) wird mittels dieses Flüssigkeitsnebels 9 die FIGS. 2 a and 2 b show a cross section through a rinsing stage 7. The rinsing nozzles 11 serve to spray the surface of the metal strip 14 with a rinsing agent, so that residues of the dressing agent are removed from the strip surface 14. The flushing nozzles 11 are connected via supply lines to a supply device, not shown. The detergent is collected in a tub as a template and recycled. In FIG. 2a, a spray nozzle row 13 is shown in each case at the height of the pass line on the side walls. In FIG. 2b, two spray nozzle rows 13 per side are shown above and below the pass line. They represent a nebulizer, by means of which a liquid (usually pure water) is atomized into mist. This liquid mist 9 is introduced into the interior of the rinsing stage 7 from the side. In the case of a belt standstill or greatly reduced belt speed (the supply of the rinsing liquid to the rinsing nozzles 11 is zone-wise or completely stopped) is by means of this liquid mist 9 the
Oberfläche des Metallbandes 14 feucht gehalten, so dass die Ausbildung von "Sprühbildern" und unerwünschten Verfärbungen auf der Oberfläche verhindert wird. Durch diese Atmosphäre im Innenraum der Spülstufe 7 können die „Sprühbilder" und unerwünschten Verfärbungen für eine begrenzte Zeit verhindert werden. Bei einem Bandstillstand ist es daher erfindungsgemäß innerhalb einer begrenzten Zeit nicht mehr erforderlich, den Bandabschnitt in der Spülzone 4 in die Beizzone 3 zurück zu fahren .  Surface of the metal strip 14 kept moist, so that the formation of "spray patterns" and unwanted discoloration on the surface is prevented. Due to this atmosphere in the interior of the rinsing stage 7, the "spray patterns" and undesired discolorations can be prevented for a limited period of time.Therefore, according to the invention, it is no longer necessary within a limited time to return the band section in the rinsing zone 4 to the pickling zone 3 within a limited time drive .
Die Sprühdüsen 13 sind in Bandlaufrichtung 5 gesehen auf einer Linie gereiht, die entweder etwa in Höhe der Passlinie 6 der Spülzone 7 liegt (Figur 2a) oder oberhalb und unterhalb der Passlinie (Figur 2b) angeordnet sind. Der The spray nozzles 13 are lined up in the direction of tape 5 seen on a line that is either approximately equal to the pass line 6 of the rinse zone 7 (Figure 2a) or above and below the pass line (Figure 2b) are arranged. Of the
Sprühnebelstrahl 15 zeigt quer zur Bandlaufrichtung 5. Spray jet 15 shows transversely to the strip running direction 5.
Eine bevorzugte Ausbildung der Sprühdüsen 13 kann entweder eine Einstoffdüse (z.B.: Vollkegeldüse) oder eine A preferred embodiment of the spray nozzles 13 may be either a single-fluid nozzle (e.g., Vollkepfüse) or a
Zweistoffdüse sein. Be two-fluid nozzle.
Obwohl die Erfindung in Detail durch das bevorzugte  Although the invention in detail by the preferred
Ausführungsbeispiel näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der The invention has not been limited by the disclosed examples and other variations can be deduced therefrom by the person skilled in the art without departing from the scope of the present invention
Erfindung zu verlassen. To leave invention.
Selbstverständlich kann eine solche Spülzone 4 auch aus mehr als drei hintereinander geschalteten Spülstufen 7 bestehen. Wie oben ausgeführt, tritt das Problem der "Sprühbilder" bei Bandstillstand bzw. das Problem unerwünschter Verfärbungen bei Bandstillstand oder, stark reduzierter Of course, such a rinsing zone 4 also consist of more than three rinsing stages 7 connected in series. As stated above, the problem of "spray patterns" occurs with belt stoppage or the problem of undesired discoloration in the case of belt stoppage or, greatly reduced
Bandgeschwindigkeit auf. Tape speed up.
Zusammenstellung der verwendeten Bezugszeichen Compilation of the reference numbers used
1 Behandlungsanlage 1 treatment plant
2 Metallband  2 metal band
3 Bei z zone  3 At z zone
4 Spülzone  4 rinsing zone
5 Bewegungsrichtung des Metallbandes  5 direction of movement of the metal strip
6 Passlinie  6 pass line
7 Spülstufe  7 rinsing stage
8 Einrichtung zum Erzeugen des Flüssigkeitsnebels8 means for generating the liquid mist
9 Flüssigkeitsnebel 9 liquid mist
10 Abquetschrollen  10 squeeze rolls
11 Spüldüse  11 rinse nozzle
12 Seitenwand  12 side wall
13 Sprühdüse  13 spray nozzle
14 Bandoberfläche  14 strip surface
15 Sprühnebelstrahl  15 spray jet

Claims

Patentansprüche Patent claims
Vorrichtung zur Nachbehandlung eines Metallbandes Device for post-treatment of a metal strip
(2), wobei das aus einer Beizzone (2), which consists of a pickling zone
(3) kommende gebeizte (3) coming stained
Metallband (2) im Durchlaufbetrieb durch eine Spülzone (4) hindurch bewegt wird, in welcher an der Metal strip (2) is moved in continuous operation through a rinsing zone (4), in which
Bandoberfläche (14) des Metallbandes (2) anhaftende Reste eines Beizmittels durch Aufsprühen eines Residues of a pickling agent adhering to the strip surface (14) of the metal strip (2) can be sprayed on
Spülmittels entfernt werden, dadurch gekennzeichnet, dass in der Spülzone (4) eine Einrichtung (8) zum Detergent can be removed, characterized in that in the rinsing zone (4) there is a device (8) for
Erzeugen eines Flüssigkeitsnebels (9) vorgesehen ist, mittels dessen im Falle einer Unterbrechung des Generation of a liquid mist (9) is provided, by means of which in the event of an interruption of the
Durchlaufbetriebs (Bandstillstand) oder stark Continuous operation (conveyor standstill) or strong
reduzierter Bandgeschwindigkeit die Oberfläche (14) des Metallbandes (2) befeuchtbar ist. reduced belt speed, the surface (14) of the metal strip (2) can be moistened.
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Spülzone Device according to claim 1, characterized in that the rinsing zone
(4) aus mehreren hintereinander geschalteten Spülstufen (7) zusammengesetzt ist, wobei die Einrichtung (8) zumindest in einer der Spülstufen (7) vorgesehen ist. (4) is composed of several flushing stages (7) connected in series, the device (8) being provided in at least one of the flushing stages (7).
Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Einrichtung (8) an den Seitenwänden (12) dieser zumindest einer Spülstufe (7) angeordnet ist. Device according to claim 2, characterized in that the device (8) is arranged on the side walls (12) of this at least one rinsing stage (7).
Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Einrichtung (8) durch ein oder mehrere jeweils in den Seitenwänden (12) angeordnete Sprühdüsen (13), gebildet ist. Device according to claim 3, characterized in that the device (8) is formed by one or more spray nozzles (13) arranged in the side walls (12).
Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Sprühdüsen (13) in einer durch die Passlinie (6) des Metallbandes (2) vorgegebenen Ebene angeordnet sind und der jeweils erzeugte Sprühnebelstrahl (15) quer zur Bandlaufrichtung Device according to claim 4, characterized in that the spray nozzles (13) are arranged in a plane predetermined by the fitting line (6) of the metal strip (2) and the spray mist jet (15) generated in each case is transverse to the direction of travel of the strip
(5) gerichtet ist. (5) is directed.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Sprühdüsen (13) jeweils oberhalb und unterhalb der Passlinie (6) des Metallbandes (2) vorgegebnen 6. Device according to claim 4, characterized in that the spray nozzles (13) are each predetermined above and below the fitting line (6) of the metal strip (2).
Ebenen angeordnet sind und der jeweils erzeugte Levels are arranged and the one created in each case
Sprühnebelstrahl (15) quer zur Bandlaufrichtung (5) gerichtet ist. Spray mist jet (15) is directed transversely to the belt running direction (5).
7. Vorrichtung nach Anspruch 6 dadurch gekennzeichnet, dass in der Einrichtung (8) angeordnete Sprühdüsen (13) als Einstoffdüsen ausgeführt sind. 7. Device according to claim 6, characterized in that spray nozzles (13) arranged in the device (8) are designed as single-substance nozzles.
8. Vorrichtung nach Anspruch 6 dadurch gekennzeichnet, dass in der Einrichtung (8) angeordnete Sprühdüsen (13) als Zweistoffdüsen ausgeführt sind. 8. Device according to claim 6, characterized in that spray nozzles (13) arranged in the device (8) are designed as two-substance nozzles.
9. Verfahren zur Nachbehandlung eines Metallbandes (2), wobei das aus einer Beizzone (3) kommende gebeizte 9. Process for the aftertreatment of a metal strip (2), the pickled coming from a pickling zone (3).
Metallband (2) im Durchlaufbetrieb durch eine Spülzone (4) hindurch bewegt wird, in welcher an der Oberfläche (14) des Metallbandes (2) anhaftende Reste eines Metal strip (2) is moved in continuous operation through a rinsing zone (4), in which residues of a metal strip adhering to the surface (14) of the metal strip (2).
Beizmittels entfernt werden, dadurch gekennzeichnet, dass im Falle einer Unterbrechung des Durchlaufbetriebs (Bandstillstand) oder stark reduzierter Pickling agent are removed, characterized in that in the event of an interruption of the continuous operation (line stop) or greatly reduced
Bandgeschwindigkeit das Aufsprühen der Spülflüssigkeit zonenweise oder ganz unterbrochen wird und mittels einer in der Spülzone (4) vorgesehenen Einrichtung (8) ein Flüssigkeitsnebel (9) erzeugt wird, mittels dessen die Oberfläche (14) des Metallbandes (2) feucht gehalten wird . Belt speed, the spraying of the rinsing liquid is interrupted zone by zone or completely and a liquid mist (9) is generated by means of a device (8) provided in the rinsing zone (4), by means of which the surface (14) of the metal strip (2) is kept moist.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Spülzone (4) aus mehreren Spülstufen (7) zusammengesetzt ist, wobei zumindest in einer der 10. The method according to claim 9, characterized in that the rinsing zone (4) is composed of several rinsing stages (7), at least in one of the
Spülstufen (7) der dort befindliche Abschnitt des Rinsing stages (7) the section of the located there
Metallbandes mittels Flüssigkeitsnebel (9) zusätzlich oder alternativ feucht gehalten wird. Metal strip is additionally or alternatively kept moist by means of liquid mist (9).
11. Verfahren nach Anspruch 9 oder 10, dadurch 11. The method according to claim 9 or 10, thereby
gekennzeichnet, dass der mittels der Einrichtung (8) eingebrachte Flüssigkeitsnebel (9) jeweils von den Seitenwänden (12) zumindest einer Spülstufe (7) characterized in that the liquid mist (9) introduced by means of the device (8) is removed from the side walls (12) of at least one rinsing stage (7)
eingebracht wird. is introduced.
12. Verfahren nach Anspruch 9, 10 oder 11, dadurch 12. The method according to claim 9, 10 or 11, thereby
gekennzeichnet, dass mittels der Einrichtung (8) ein Sprühnebelstrahl (15) quer zur Bandlaufrichtung (5) ausgerichtet erzeugt wird. characterized in that a spray mist jet (15) is generated by means of the device (8) aligned transversely to the belt running direction (5).
13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Sprühnebelstrahl (15) mittels Sprühdüsen (13) erzeugt wird, die in einer durch die Passlinie (6) des Metallbandes (2) vorgegebenen Ebene angeordnet werden. 13. The method according to claim 12, characterized in that the spray mist jet (15) is generated by means of spray nozzles (13) which are arranged in a plane predetermined by the fitting line (6) of the metal strip (2).
14. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Sprühnebelstrahl (15) mittels Sprühdüsen (13) erzeugt wird, die in Ebenen oberhalb und unterhalb der Passlinie (6) des Metallbandes (2) angeordnet werden. 14. The method according to claim 12, characterized in that the spray mist jet (15) is generated by means of spray nozzles (13) which are arranged in levels above and below the fitting line (6) of the metal strip (2).
15. Verfahren nach Anspruch 9 bis 14, dadurch 15. The method according to claims 9 to 14, thereby
gekennzeichnet, dass der Flüssigkeitsnebel (9) mittels Einstoffdüse eingebracht wird. characterized in that the liquid mist (9) is introduced using a single-substance nozzle.
16. Verfahren nach Anspruch 9 bis 14, dadurch 16. The method according to claims 9 to 14, thereby
gekennzeichnet, dass der Flüssigkeitsnebel (9) mittels Zweistoffdüse eingebracht wird. characterized in that the liquid mist (9) is introduced using a two-fluid nozzle.
EP12772925.9A 2011-10-14 2012-10-11 Method and device for treating a metal strip Active EP2766511B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11185215.8A EP2581474A1 (en) 2011-10-14 2011-10-14 Method and device for treating a metal strip
EP12772925.9A EP2766511B1 (en) 2011-10-14 2012-10-11 Method and device for treating a metal strip
PCT/EP2012/070132 WO2013053804A1 (en) 2011-10-14 2012-10-11 Device and method for post-treating a metal strip

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EP2766511B1 EP2766511B1 (en) 2018-03-21

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EP (2) EP2581474A1 (en)
KR (1) KR101941546B1 (en)
CN (1) CN103874785A (en)
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CN103643248B (en) * 2013-11-22 2016-03-02 武汉钢铁(集团)公司 Eliminate method and the device of strip pickling parking spot
CN104862727A (en) * 2015-05-08 2015-08-26 无锡华工薄板有限公司 Steel strip purging and pickling device
CN106733854B (en) * 2017-01-17 2020-01-10 武汉市新裕科技有限公司 Galvanized sheet belt cleaning device
KR101958935B1 (en) * 2017-07-20 2019-07-02 주식회사 포스코 Cooling apparatus
FR3141188A1 (en) * 2022-10-24 2024-04-26 Bourdin Sarl INSTALLATION FOR RINSING PARTS AND ASSOCIATED METHOD
CN117286506B (en) * 2023-11-24 2024-03-22 泰州威绿环保科技有限公司 Be used for stainless steel goods pickling equipment

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JPS61195984A (en) * 1985-02-26 1986-08-30 Sumitomo Metal Ind Ltd Method and apparatus for suppressing discoloration in pickling
JPH02270977A (en) * 1989-04-13 1990-11-06 Kobe Steel Ltd Continuous pickling treatment of steel sheet
JPH03188289A (en) * 1989-12-18 1991-08-16 Nkk Corp Method for preventing discoloration of strip in pickling equipment
AT404472B (en) 1997-04-23 1998-11-25 Voest Alpine Ind Anlagen Method of after-treating pickled steel strip
JP3349117B2 (en) * 1999-07-06 2002-11-20 住友金属工業株式会社 Horizontal pickling equipment
AT408453B (en) * 1999-09-03 2001-12-27 Andritz Ag Maschf METHOD FOR TREATMENT, IN PARTICULAR RINSING, OF A METAL STRIP
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CN103874785A (en) 2014-06-18
WO2013053804A1 (en) 2013-04-18
ES2674331T3 (en) 2018-06-28
KR101941546B1 (en) 2019-01-24
US20140230853A1 (en) 2014-08-21
US9534302B2 (en) 2017-01-03
EP2766511B1 (en) 2018-03-21
KR20140080536A (en) 2014-06-30

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