EP4623122A1 - Dispositif de revêtement par trempage à chaud et procédé de fonctionnement de celui-ci - Google Patents

Dispositif de revêtement par trempage à chaud et procédé de fonctionnement de celui-ci

Info

Publication number
EP4623122A1
EP4623122A1 EP23810372.5A EP23810372A EP4623122A1 EP 4623122 A1 EP4623122 A1 EP 4623122A1 EP 23810372 A EP23810372 A EP 23810372A EP 4623122 A1 EP4623122 A1 EP 4623122A1
Authority
EP
European Patent Office
Prior art keywords
gutter
snout
hot dip
rim
liquid metal
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.)
Pending
Application number
EP23810372.5A
Other languages
German (de)
English (en)
Inventor
Roel Marinus Maria MALLENS
Ernesto Montagna
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.)
Tata Steel Ijmuiden BV
Original Assignee
Tata Steel Ijmuiden BV
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 Tata Steel Ijmuiden BV filed Critical Tata Steel Ijmuiden BV
Publication of EP4623122A1 publication Critical patent/EP4623122A1/fr
Pending 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
    • C23C2/003—Apparatus
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0035—Means for continuously moving substrate through, into or out of the bath
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—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
    • C23C2/04—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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • 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
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • 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
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates
    • 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
    • C23C2/325—Processes or devices for cleaning the bath
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/50—Controlling or regulating the coating processes

Definitions

  • the present invention relates to a method for operating a hot dip coating device.
  • the present invention relates to a hot dip coating device comprising a snout, air knives and a container comprising a liquid metal bath.
  • the present invention also relates to a method of coating a steel strip using a hot dip coating device.
  • Hot dip coating is a well-known process for protecting a steel product against corrosion.
  • a hot dip coating device is used to provide a metal coating such as zinc or aluminum on a moving metal sheet.
  • the metal sheet is also called a metal strip.
  • the hot dip coating device typically comprises a container for a liquid metal bath having the coating material in use. An ingot is placed as partially immersed within the liquid metal bath of the container. At the operating temperature of the liquid metal bath, dissolution of iron from the steel strip into the metal bath can occur that forms intermetallic particles. Apart from the intermetallic particles, liquid metal oxidised by the oxygen in the surrounding air are formed as oxide particles. These oxide particles stay in the top layer of the liquid metal. These intermetallic particles as well as the oxide particles are known as dross.
  • the method comprising positioning a first gutter comprising a first rim inside the snout; wherein the method further comprises positioning a second gutter comprising a second rim facing the air knives, outside the snout; wherein the second gutter is positioned between the snout and the air knives to remove surface dross between the snout and the air knives using the second gutter such that the second rim of the second gutter and the first rim of the first gutter are arranged in the same horizontal plane.
  • a hot dip coating device provides a metal coating on a moving metal sheet, comprising a liquid bath of metal coating material in use, wherein the metal coating material is to be provided on the moving metal sheet in use.
  • surface dross accumulates on the surface of the liquid metal bath of the hot dip coating device.
  • the metal strip leaves the liquid metal bath in a near-vertical direction after which the excess of the applied metallic coating is blown off with a high pressure air/gas wiping device which is known as air knives or gas knives.
  • the air knives or gas knives use air or gas such as nitrogen for blowing the excess of the metallic coating.
  • the air knives and gas knives can be used interchangeably.
  • One of the critical areas where surface dross accumulates in the liquid metal bath is the area between the air knives and the snout or the area between where the strip exits the bath and the snout outer wall. Dross formed in the back flow from the air knives accumulates against the snout wall as the surface flow is typically in that direction. At some point, the surface dross will be pushed into the bulk of the metal bath leading to dross contamination. Also, this place is difficult to reach and to clean as the room between the snout and air knives is relatively small. So it is a critical area to be cleaned so that surface dross does not accumulate in large quantities over there. The present invention provides a solution to this problem.
  • the second gutter is placed between the snout and the air knives in the hot dip coating device so that the second gutter can collect the surface dross from that area.
  • the bottom part of the second gutter is placed connecting to the outside wall of the snout such that the second rim faces the air knives.
  • the area between the front part and the bottom portion of the second gutter is a collector area that is used for collecting the surface dross from where it can be removed.
  • the second rim of the second gutter and the first rim of the first gutter are arranged in the same horizontal plane. This horizontal plane is the same plane where the surface bath level of the liquid metal bath also lies. Thus, the second rim, the first rim and the surface bath level of the liquid metal bath are in the same horizontal plane.
  • the dross removal device described by the Korean patent application KR20140081453A requires to bend the end of the snout in an outer horizontal direction and is again bent in the upper direction to form a ' I— I ' shape, in which the upper part is opened to form a space inside.
  • the dross removal device of KR20140081453A can only be attached to the end of the snout. According to this prior art document, the end of the snout can only be bent either to the inside or to outside but it cannot be bent to both inside and outside. This prior art is silent on removing the dross from inside the snout when the snout has a bent formed to its outside.
  • the collector area of the second gutter of the present invention collects the surface dross from where it can be removed by a removal device such as a pump that is connected to the second gutter.
  • a removal device such as a pump that is connected to the second gutter.
  • an amount of liquid metal also flows into the second gutter.
  • the second gutter is placed just below the surface bath level of the hot dip coating device.
  • the second rim of the second gutter is positioned just below the surface bath level of the hot dip coating device. If the second rim of the second gutter is placed above the surface bath level, no surface dross and/or liquid metal will flow into the second gutter.
  • the method comprises placing the second rim of the second gutter below the surface bath level of the liquid metal bath. This allows a natural free flow of the surface dross from the liquid metal bath to the second gutter due to gravity.
  • the method comprises continuously removing surface dross from the surface bath level of the hot dip coating device.
  • the second gutter can be connected to a pump that can continuously remove surface dross from the second gutter.
  • a continuous operation also prohibits any requirement for shutting down of the system for specific periods.
  • the pumping system can remove the surface dross into a separate dross collector container through transfer tubes.
  • the second rim 63 of the second gutter 60 and the first rim 163 of the first gutter 160 are arranged in the same horizontal plane.
  • the first rim 163 of the first gutter is aligned to be placed just below the surface bath level 20 of the liquid metal bath so that the surface dross 80 from inside the snout can easily flow into the first gutter 160.
  • the surface dross 80 can freely flow into the first gutter 160.

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

La présente invention concerne un procédé de fonctionnement d'un dispositif de revêtement par trempage à chaud. Le dispositif de revêtement par trempage à chaud comprend une busette de coulée, des lames d'air, une cuve comprenant un bain de métal liquide. Le procédé consiste à positionner une première gouttière comprenant un premier rebord à l'intérieur de la busette de coulée. Le procédé consiste en outre à positionner une seconde gouttière comprenant un second rebord faisant face aux lames d'air, à l'extérieur de la busette de coulée ; la seconde gouttière étant positionnée entre la busette de coulée et les lames d'air pour éliminer des scories de surface entre la busette de coulée et les lames d'air à l'aide de la seconde gouttière de telle sorte que le second rebord de la seconde gouttière et le premier rebord de la première gouttière sont agencés dans le même plan horizontal.
EP23810372.5A 2022-11-24 2023-11-23 Dispositif de revêtement par trempage à chaud et procédé de fonctionnement de celui-ci Pending EP4623122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22209478 2022-11-24
PCT/EP2023/082895 WO2024110603A1 (fr) 2022-11-24 2023-11-23 Dispositif de revêtement par trempage à chaud et procédé de fonctionnement de celui-ci

Publications (1)

Publication Number Publication Date
EP4623122A1 true EP4623122A1 (fr) 2025-10-01

Family

ID=84361414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23810372.5A Pending EP4623122A1 (fr) 2022-11-24 2023-11-23 Dispositif de revêtement par trempage à chaud et procédé de fonctionnement de celui-ci

Country Status (4)

Country Link
EP (1) EP4623122A1 (fr)
JP (1) JP2025538625A (fr)
KR (1) KR20250113393A (fr)
WO (1) WO2024110603A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02305948A (ja) * 1989-05-19 1990-12-19 Kawasaki Steel Corp 連続溶融金属めっき用スナウト内部のドロス除去装置
FR2816640B1 (fr) * 2000-11-10 2003-10-31 Lorraine Laminage Installation de revetement au trempe a chaud et en continu d'une bande metallique
KR101427345B1 (ko) * 2012-11-06 2014-08-07 주식회사 포스코 드로스 제거 장치
KR20140081453A (ko) 2012-12-21 2014-07-01 주식회사 포스코 드로스 제거장치

Also Published As

Publication number Publication date
KR20250113393A (ko) 2025-07-25
WO2024110603A1 (fr) 2024-05-30
JP2025538625A (ja) 2025-11-28

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