EP3591088B1 - Dispositif de revêtement par immersion à chaud d'une bande métallique - Google Patents

Dispositif de revêtement par immersion à chaud d'une bande métallique Download PDF

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Publication number
EP3591088B1
EP3591088B1 EP19184059.4A EP19184059A EP3591088B1 EP 3591088 B1 EP3591088 B1 EP 3591088B1 EP 19184059 A EP19184059 A EP 19184059A EP 3591088 B1 EP3591088 B1 EP 3591088B1
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EP
European Patent Office
Prior art keywords
unit
slot
metal strip
slot opening
suctioning
Prior art date
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Active
Application number
EP19184059.4A
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German (de)
English (en)
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EP3591088A1 (fr
Inventor
Sridhar Palepu
Michael Peters
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.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
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Publication of EP3591088A1 publication Critical patent/EP3591088A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
    • 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
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • C23C2/004—Snouts
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • 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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • 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
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/12—Aluminium or alloys based thereon

Definitions

  • the invention relates to a device for hot-dip coating a metal strip.
  • Conventional coil coating systems such as systems for continuous hot-dip galvanizing of steel strip, have a continuous furnace, a molten bath (zinc bath), a device for adjusting the (zinc) coating thickness and a subsequent cooling device in the direction of travel of the strip.
  • the steel strip is heat-treated in a continuous process, wherein the continuous furnace can be divided into several chambers in which different treatments, in particular in connection with different temperatures, can be carried out. These treatments can preferably include setting the desired mechanical properties in the steel strip base material by, for example, recrystallization of the steel structure.
  • An area (chamber) in the continuous furnace can define a zone for reducing the iron oxides formed on the surface of the steel strip.
  • Another area (chamber) can define a cooling zone in the continuous furnace, in which the steel strip is cooled, preferably under protective gas (HNX), to a temperature close to the temperature of the molten bath.
  • the protective gas is intended to prevent the annealed strip from oxidizing before coating (galvanizing), which means that wetting and thus adhesion of the coating or coating (zinc layer) to the surface of the steel strip would not be possible or only poorly and thus the required quality standards cannot be met.
  • different gas atmospheres are sometimes required in the areas (chambers) in the continuous furnace.
  • the steel strip is passed through a sluice flooded with protective gas, with the exclusion of the ambient atmosphere, which is also known as a trunk among experts.
  • devices are used within the trunk which cause the atmosphere to circulate within the trunk by targeted blowing in at one or more points, combined with suction at one or more points to discharge or remove the dusty atmosphere.
  • the blow-suction unit -Unit has a plurality of injection openings for applying protective gas to the steel strip, wherein a plurality of injection openings are arranged or can be arranged on a first side of the steel strip and a plurality of injection openings on a second side of the steel strip, the blow-suction unit being a plurality of suction openings for suctioning off protective gas laden with zinc vapor and / or zinc dust, wherein a plurality of suction openings are arranged or can be arranged on the first side of the steel strip and a plurality of suction openings on the second side of the steel strip, wherein the blower -Suction unit has a
  • blow-and-suction unit within the trunk, however, leads to a reduction in the cross-section of the steel belt, so that if vibrations and / or fluctuating operating conditions occur in the galvanizing line during operation, the belt does not swing out of the plane of the direction of belt travel, and thus does not prevent it Contact with the blow-suction unit cannot be ruled out, which can damage the belt and the system. There is a need for further optimization in relation to the state of the art.
  • the invention is based on the object of providing a device for hot-dip coating a metal strip, with which an operationally reliable coating process can be ensured under fluctuating operating conditions.
  • a device for hot-dip coating a metal strip with a continuous furnace for guiding and heating the metal strip, with a vessel arranged in the running direction of the metal strip behind the continuous furnace and filled with melt, with a trunk arranged between the continuous furnace and the vessel for passing through and Introducing the metal strip into the melt in the vessel, the trunk comprising a blow-suction unit with at least one injection unit and at least one suction unit, which are arranged on at least one wall, in particular on two opposing walls of the trunk, the at least one suction unit is arranged in the running direction of the metal strip behind the at least one injection unit, wherein the at least one injection unit has at least one slot opening for blowing gas into the trunk and the at least one suction unit has at least one slot opening for sucking off Ga s from the trunk, wherein the at least one slot opening extends transversely to the direction of travel of the metal strip.
  • the inventors have found that, due to the arrangement of the at least one slot opening of the injection unit and / or suction unit, the at least one slot opening essentially flush with the wall of the trunk and / or being arranged in line with the wall, compared to the one in State of the art shown complete arrangement of the blow-suction unit within the trunk, the flow cross-section is not disadvantageously reduced, so that a contact between the metal band and trunk or (further) parts / components of the trunk can be excluded and thereby prevents damage and an operationally reliable coating process can be ensured.
  • the blow-suction unit with the at least one blow-in unit and the at least one suction unit are or are mounted on the outside of the wall of the trunk, so that the blow-in and / or suction unit with its or theirs via suitable openings in the wall of the trunk. their slot opening (s) flush with the Complete the wall of the trunk.
  • the blow-suction unit arranged or mounted on the wall of the trunk from the outside also has the advantage of easy accessibility, especially during operation, and thus the possibility of quick and uncomplicated maintenance and / or cleaning.
  • An injection unit with a suction unit adjacent in the running direction of the metal strip are preferably located opposite one another on two opposite walls of the trunk. The two opposing walls run essentially parallel to the surface of the metal strip.
  • Two further (opposite) walls complete or define the trunk, which essentially runs with a longitudinally rectangular cross section, and are oriented essentially perpendicular to the edge of the metal strip.
  • the melt in the vessel is a metallic melt, which preferably consists of zinc or a zinc alloy or alternatively can consist of aluminum or an aluminum alloy.
  • the metal band is preferably a steel band.
  • a slot opening is defined by a slot-shaped cross section with a width b and a length I, where I is a multiple of b, in particular I> 10 ⁇ b, preferably I> 20 ⁇ b.
  • the injection unit has a plurality of slot openings with interruptions in between. If several slot openings are provided in the transverse direction or transversely to the running direction of the metal strip with interruptions, a tight gas curtain can be created, for example, so that the metal vapor rising from the melt is specifically prevented from rising further inside the trunk or into the continuous furnace.
  • the injection unit preferably has at least two rows, with exactly two rows or more than two rows being provided, of a plurality of slot openings with interruptions in between, the slot openings of the rows being offset from one another and, in particular, overlapping at least in sections adjacent to one another.
  • the slot openings can be used optimally, since in particular the jet expansion that occurs from adjacent slot openings escaping gas flows do not influence each other (negatively) and thus a closed gas curtain can form. Due to the staggered arrangement of the slot openings in an injection unit in relation to the slot openings or interruptions in the injection unit provided on the opposite wall, a tight gas curtain is also formed in the outer areas of the trunk that are not traversed by the metal strip and in which the blown gas streams meet .
  • the slot openings of the injection unit have a width b1 with a distance a1 between the rows in the range of 2 ⁇ b1 ⁇ a1 4 ⁇ b1, with a sectional overlap ü1 in the range of a1 ü1 ü 2 ⁇ a1 , with a length l1, which corresponds to 35 ⁇ b1 ⁇ l1 ⁇ 70 ⁇ b1.
  • the slot openings should not be too far apart from one another.
  • the suction unit has a plurality of slot openings with interruptions in between. If several slot openings arranged with interruptions in the transverse direction or transversely to the running direction of the metal strip are provided, effective suction can be promoted so that the metal vapor rising from the melt can be suctioned off in a targeted manner.
  • the suction unit preferably has at least two rows, with exactly two rows or more than two rows being provided, consisting of a plurality of slot openings with interruptions in between, the slot openings of the rows being offset from one another and, in particular, overlapping at least in sections adjacent to one another. Due to the arrangement in rows and the interruptions in the rows, the slot openings can be used optimally for suction and thus for the targeted removal of the rising metal vapor and / or dust.
  • the slot openings of the suction unit have a width b2 with a distance a2 between the rows in the range of 3 ⁇ b2 ⁇ a2 8 ⁇ b2, with a sectional overlap ü2 in the range of a2 ü2 2 ⁇ a2 , with a length l2, which corresponds to 20 ⁇ b1 ⁇ l1 ⁇ 60 ⁇ b1.
  • the slot opening is preferably the suction unit larger than the slot opening of the injection unit, whereby the widths and the lengths are in the following relationship to one another, with 3 ⁇ b1 ⁇ b2 ⁇ 10 ⁇ b1 and 2 ⁇ l1 ⁇ l2 ⁇ 6 ⁇ l1.
  • the smaller dimension of the slot opening of the injection unit is intended to cause a certain impulse in connection with a circulation of the atmosphere within the trunk, whereby the larger dimension of the slot opening of the suction unit is intended to ensure that the metal vapor and / or metal dust can be discharged without clogging or clogging the slot opening (s) avoided and thereby the maintenance intervals can be extended, especially for cleaning purposes.
  • the at least one injection unit and the at least one suction unit each comprise at least one central opening arranged opposite the slot opening for supplying or removing gas. In this way, the flow conditions can be kept largely the same over the width of the injection and extraction unit.
  • the at least one blow-in unit and / or the at least one suction unit are divided into several sections, in particular in their longitudinal extension or transversely to the running direction of the metal strip, the sections being separated from one another in a gastight manner and each section being provided with its own central opening is, in particular, is or can be connected to a line for supplying or removing gas.
  • this division into sections that are preferably of equal width / length, the flow conditions can be further improved over the width of the trunk and, in particular, the required power per line can be reduced.
  • the injection unit has an essentially nozzle-shaped cross section, the slot opening being provided in the narrowest area of the nozzle-shaped cross section, the slot opening or the slot openings being / are provided in the end area of the nozzle-shaped cross section.
  • the nozzle-shaped cross section has a geometry that is advantageous in terms of flow technology.
  • the suction unit has an essentially combined uv-shaped cross section, the slot opening in the narrowest area and the slot openings in the end areas of the legs of the uv-shaped Cross-section is / are provided.
  • Such a design has a positive influence on the flow conditions and can improve the suction effect.
  • Devices according to the invention are preferably operated for hot-dip coating a metal strip, in that a larger volume flow of gas is sucked off through the at least one suction unit than the volume flow of gas blown in through the at least one adjacent blow-in unit.
  • the extracted volume flow is at least 1.5 times greater than the volume flow blown in through the adjacent injection unit.
  • the blown gas consists of nitrogen or alternatively of a mixed gas.
  • the mixed gas can contain nitrogen and hydrogen in a proportion of up to 10% by volume.
  • FIG 1 a sketched device (10) is shown as it is known from the prior art.
  • the device (10) is suitable for hot-dip coating a metal strip (1), preferably a steel strip (1), with a symbolically illustrated continuous furnace (12) for passing through and heating the metal strip (1), with one in the running direction (L) of the metal strip (1) behind the continuous furnace (12) with a melt (11.1) filled vessel (11), with a trunk (13) arranged between the continuous furnace and the first vessel (11) for guiding and introducing the metal strip (1) into the Melt (11.1) in the vessel (11), with a deflection roller (15) arranged in the vessel (11) for deflecting and guiding the metal strip (1) out of the vessel (11).
  • Additional stabilizing rollers (18) can be arranged in the vessel (11), which in particular stabilize the metal strip (1) when it emerges from the melt (11.1) and cause the strip to run smoothly, in particular in connection with above the vessel (11) on both sides wiping nozzles (19) arranged on the exiting metal strip (1) for adjusting the layer thickness on the metal strip (1), preferably for adjusting a constant layer thickness.
  • the trunk (13) comprises a blow-suction unit (14) with at least one blowing unit (14.1) and at least one suction unit (14.2), which are arranged in particular on two opposing walls (13.1) of the trunk (13).
  • the at least one suction unit (14.2) is arranged in the running direction (L) of the metal strip (1) behind the at least one injection unit (14.1), the at least one injection unit (14.1) having at least one slot opening (14.11) for injecting gas into the trunk ( 13) and the at least one suction unit (14.2) have at least one slot opening (14.21) for sucking gas from the trunk (13).
  • the slot opening (14.11, 14.21) extends essentially transversely to the running direction (L) of the metal strip (1).
  • blow-and-suction unit (14) inside the trunk (13) leads to a reduction in the flow cross-section of the metal strip (1), so that in the event of vibrations and / or fluctuating operating conditions in the device (10) for coating during operation swinging of the belt out of the plane of the running direction (L) of the metal belt (1) is not prevented and contact with the blow-suction unit (14) cannot be ruled out, so that damage to the metal belt (1) and also in the system (10, 13) can arise.
  • Figure 2 shows a schematic representation of an embodiment of the device (10) according to the invention in the cross section of a trunk (13).
  • the flow cross-section of the trunk (13) is no longer disadvantageously reduced, so that contact between metal strip (13) and trunk (13) or parts thereof can be excluded and damage can be prevented and an operationally reliable coating process can be ensured.
  • the blow-suction unit (14) is arranged outside the trunk (13), preferably arranged or mounted from the outside on the wall (13.1) of the trunk (13), the at least one The slot opening (14.11, 14.21) of the at least one injection unit (14.1) and / or the at least one suction unit (14.2) is arranged such that it is essentially flush with the wall (13.1) of the trunk (13).
  • FIG. 3 is a partial perspective view of the embodiment in FIG Figure 2 shown, which quasi shows the area of the blow-suction unit (14) below the transport plane of the metal belt (1).
  • the slot openings (14.11) of the injection unit (14.1) are arranged offset from one another, cf. Figure 4 .
  • the illustration shows the outermost slot opening (14.11) in the upper one, seen in the width direction of the trunk (13), cf. Figure 4 , or opposite to the running direction (L), row arranged and the bottom row begins with an interruption, viewed from left to right, cf. also Figure 4 .
  • the injection unit (14.1, 14'.1) has an essentially nozzle-shaped cross-section, with the slot opening (s) (14.11) in the narrowest area of the nozzle-shaped cross section and the slot opening (s) (14.11) in the end area of the nozzle-shaped cross section, in particular opposite one another from the central opening (14.12) is / are provided.
  • the suction unit (14.2, 14'.2) has an essentially combined uv-shaped cross section, the slot opening (14.21) being provided in the narrowest area and the slot openings (14.21) being provided in the end areas of the legs of the uv-shaped cross section / are.
  • Figure 4 shows a schematic section (AA) in the plane of the wall (13.1) of the trunk (13) in a plan view on the side assigned to the surface of the metal strip (1), quasi the wall (13.1) of the trunk (13.1) running below the metal strip (1). 13), having an arrangement of a blow-suction unit according to the invention (14, 14.1, 14.2).
  • the injection unit (14.1) comprises two sections (14'.1), which are indicated by dashed lines in the drawing, with two rows of slot openings (14.11), each of which has interruptions or spaces between the slot openings (14.11).
  • lines (not shown) which can be connected to the central openings (14.12, 14.22) or are connected, cf. Figure 3 .
  • the slot openings (14.11) each have a width b1 and a length l1.
  • the two rows of slot openings (14.11) are spaced a1 apart in the running direction (L).
  • the slot openings (14.11) of adjacent rows are offset from one another so that a slot opening (14.11) of the adjacent row is assigned to an interruption in one row.
  • the slot openings (14.11) are made longer than the intervening interruptions so that, viewed in the running direction (L), an overlap (ü1) of the ends of the slot openings (14.11) is created.
  • the overlap (ü1) is designed uniformly along the injection unit (14.1, 14'.1).
  • a suction unit (14.2) Seen in the running direction (L), a suction unit (14.2) is arranged, which also comprises two sections (14'.2) and are indicated by dashed lines in the drawing, with two rows of slot openings (14.21), each of which has interruptions or spaces between the Have slot openings (14.21).
  • the slot openings (14.21) each have a width b2 and a length l2.
  • the two rows of slot openings (14.21) are spaced apart from one another at a distance a2 in the running direction (L).
  • the slot openings (14.21) of adjacent rows are offset from one another, so that an interruption in one row is assigned a slot opening (14.21) of the adjacent row.
  • the slot openings (14.21) are made longer than the intervening interruptions so that, viewed in the running direction (L), an overlap (ü2) of the ends of the slot openings (14.21) is created.
  • the overlap (ü2) is formed uniformly along the injection unit (14.2, 14'.2).
  • the slot openings (14.21) of the suction unit (14.2) are larger, with four slot openings (14.21) being provided in the top row as shown and in the row below two.
  • the slot openings (14.11, 14.21) close flush with the wall (13.1) of the trunk or are arranged in alignment with the wall (13.1).
  • Zinc or different zinc alloys can particularly preferably be used as melts, in particular zinc alloys with different contents of magnesium and / or aluminum and / or nickel. Alternatively, aluminum or aluminum alloys can also be used.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Claims (13)

  1. Dispositif (10) de revêtement par immersion à chaud d'un feuillard métallique (1), comprenant un four continu pour faire passer et réchauffer le feuillard métallique (1), comprenant un récipient (11) rempli de masse fondue (11.1) et disposé après le four continu dans le sens de défilement (L) du feuillard métallique (1), comprenant une trompe (13) disposée entre le four continu et le récipient (11) pour faire passer et introduire le feuillard métallique (1) dans la masse fondue (11.1) dans le récipient (11), la trompe (13) comprenant une unité de soufflage/aspiration (14) munie d'au moins une unité d'insufflation (14.1) et d'au moins une unité d'aspiration (14.2) qui sont disposées au moins sur une paroi (13.1) de la trompe (13), ladite au moins une unité d'aspiration (14.2) étant disposée dans le sens de défilement (L) du feuillard métallique (1) après ladite au moins une unité d'insufflation (14.1), dans lequel ladite au moins une unité d'insufflation (14.1) présente au moins une ouverture en fente (14.11) pour insuffler un gaz dans la trompe (13), et ladite au moins une unité d'aspiration (14.2) présente au moins une ouverture en fente (14.21) pour aspirer le gaz de la trompe (13), ladite au moins une ouverture en fente (14.11, 14.21) s'étendant transversalement au sens de défilement (L) du feuillard métallique (1),
    caractérisé en ce que ladite au moins une ouverture en fente (14.11, 14.21) de l'unité d'insufflation (14.1) et/ou de l'unité d'aspiration (14.2) est disposée de telle sorte qu'elle est alignée sur la paroi (13.1) de la trompe (13) et/ou est disposée en alignement de la paroi (13.1).
  2. Dispositif selon la revendication 1, dans lequel ladite au moins une unité d'insufflation (14.1) présente une pluralité d'ouvertures en fente (14.11) munies de ruptures interposées.
  3. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une unité d'insufflation (14.1) présente au moins deux rangées composées d'une pluralité d'ouvertures en fente (14.11) munies de ruptures interposées, les ouvertures en fente (14.11) des rangées étant disposées de manière décalée les unes par rapport aux autres et se chevauchant au moins par endroits les unes à côté des autres.
  4. Dispositif selon la revendication 3, dans lequel les ouvertures en fente (14.11) présentent une largeur b1 à une distance a1 entre les rangées dans la plage 2∗b1 ≤ a1 ≤ 4∗b1, un chevauchement par endroits ü1 étant compris dans la plage a1 ≤ ü1 ≤ 2∗a1, d'une longueur l1 correspondant à 35∗b1 ≤ Il ≤ 70∗b1.
  5. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une unité d'aspiration (14.2) présente une pluralité d'ouvertures en fente (14.21) munies de ruptures interposées.
  6. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une unité d'aspiration (14.2) présente des ouvertures en fente (14.21) munies de ruptures interposées sur au moins deux rangées, les ouvertures en fente (14.21) des rangées étant disposées en étant décalées les unes par rapport aux autres et se chevauchant au moins par endroits les unes à côté des autres.
  7. Dispositif selon la revendication 6, dans lequel les ouvertures en fente (14.21) présentent une largeur b2 à une distance a2 entre les rangées dans la plage 3∗b2 ≤ a2 ≤ 8∗b2, un chevauchement par endroits ü1 étant compris dans la plage a2 ≤ ü2 ≤ 2∗a2, d'une longueur l2 correspondant à 20∗b2 ≤ l2 ≤ 60∗b2.
  8. Dispositif selon l'une quelconque des revendications 5 et 7, dans lequel l'ouverture en fente (14.21) de l'unité d'aspiration (14.2) est plus grande que l'ouverture en fente (14.11) de l'unité d'insufflation (14.1), les largeurs et les longueurs se trouvant dans la relation suivante, où 3∗b1 ≤ b2 ≤ 10∗b1 et 2∗l1 ≤ l2 ≤ 6∗l1.
  9. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une unité d'insufflation (14.1) et ladite au moins une unité d'aspiration (14.2) comprennent respectivement au moins une ouverture centrale (14.12, 14.22) pour l'alimentation ou l'évacuation de gaz, disposée en face de l'ouverture en fente (14.11, 14.21).
  10. Dispositif selon la revendication 9, dans lequel ladite au moins une unité d'insufflation (14.1) et/ou ladite au moins une unité d'aspiration (14.2) sont subdivisées en plusieurs parties (14'.1, 14'.2), les parties (14'.1, 14'.2) étant séparées les unes des autres de manière étanche au gaz, et chaque partie (14'.1, 14'.2) étant munie de sa propre ouverture centrale (14.12, 14.22).
  11. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une unité d'insufflation (14.1) présente une section transversale substantiellement en forme de buse, l'ouverture en fente (14.11) étant prévue dans la zone la plus étroite de la section transversale en forme de buse.
  12. Dispositif selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une unité d'aspiration (14.1) présente une section transversale substantiellement en forme de U et de V combinés, l'ouverture en fente (14.21) étant prévue dans la zone la plus étroite de la section transversale en forme de U et de V.
  13. Dispositif selon l'une quelconque des revendications précédentes, dans lequel une unité d'insufflation (14.1) et une unité d'aspiration (14.2) voisine dans le sens de défilement (L) du feuillard métallique (1) sont respectivement situées de manière à être mutuellement opposés sur deux parois (13.1) de la trompe (13).
EP19184059.4A 2018-07-06 2019-07-03 Dispositif de revêtement par immersion à chaud d'une bande métallique Active EP3591088B1 (fr)

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DE102018211182.0A DE102018211182A1 (de) 2018-07-06 2018-07-06 Vorrichtung und Verfahren zum Schmelztauchbeschichten eines Metallbandes

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Publication number Priority date Publication date Assignee Title
DE102012106106A1 (de) * 2012-07-06 2014-09-18 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zur Vermeidung von durch Zinkstaub verursachten Oberflächenfehlern in einer kontinuierlichen Bandverzinkung
DE102015108334B3 (de) 2015-05-27 2016-11-24 Thyssenkrupp Ag Vorrichtung und Verfahren zur verbesserten Metalldampfabsaugung bei einem kontinuierlichen Schmelztauchverfahren
WO2018228663A1 (fr) * 2017-06-12 2018-12-20 Thyssenkrupp Steel Europe Ag Dispositif et procédé de séparation d'atmosphères de gaz
WO2018228661A1 (fr) * 2017-06-12 2018-12-20 Thyssenkrupp Steel Europe Ag Trompe pour une installation de revêtement par immersion à chaud ainsi que son procédé de fonctionnement
CN110730828B (zh) * 2017-06-12 2021-05-25 蒂森克虏伯钢铁欧洲股份公司 用于热浸镀层设备的风口支管

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