EP0767253A1 - Appareil de revêtement en continu par immersion d'une bande d'acier - Google Patents

Appareil de revêtement en continu par immersion d'une bande d'acier Download PDF

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Publication number
EP0767253A1
EP0767253A1 EP95115689A EP95115689A EP0767253A1 EP 0767253 A1 EP0767253 A1 EP 0767253A1 EP 95115689 A EP95115689 A EP 95115689A EP 95115689 A EP95115689 A EP 95115689A EP 0767253 A1 EP0767253 A1 EP 0767253A1
Authority
EP
European Patent Office
Prior art keywords
steel strip
rollers
deflection
deflecting
roller
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.)
Withdrawn
Application number
EP95115689A
Other languages
German (de)
English (en)
Inventor
Horacio Carlos Falia
Federico Arturo Turtl
Carlos Ignacio Rojas
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.)
Comesi SAIC
Original Assignee
Comesi SAIC
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 Comesi SAIC filed Critical Comesi SAIC
Priority to EP95115689A priority Critical patent/EP0767253A1/fr
Publication of EP0767253A1 publication Critical patent/EP0767253A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips

Definitions

  • the invention relates to a device for the continuous hot dip metallization of a steel strip.
  • the known deflection rollers have a wrap angle for the steel belt of at least 120 °, which results in a very large contact area between the roller and the belt.
  • this large contact area is very unfavorable, since it traps liquid parts of the alloy bath between the belt and the roller. This in turn leads to strip deformations which reduce quality, since the liquid, trapped metal cannot escape and the sheet steel strip is guided with great tension over the deflection rollers.
  • a large wrap angle on the deflecting roller also has the result that, due to the large roller surface, a large amount of deposits can build up, which arise as a result of reactions of aggressive constituents of the alloy bath with the roller surface, which in turn leave marks and grooves in the surface of the surface to be coated Cause steel strip, which lowers its quality.
  • the invention has for its object to develop a device of the type described above so that the product quality of the coated steel strip is improved.
  • the device has at least two deflecting rollers for deflecting the steel strip, each deflecting roller having a mechanical scraper provided with an inert gas supply for removing deposits.
  • each individual deflecting roller can be made smaller than when using only a single deflecting roller. If the belt speed remains unchanged, this increases the angular speed of the individual deflecting rollers, so that the scraping result improves due to the greater frequency of passage of each individual surface element of the roller. Due to the distribution of the total wrap angle of at least 120 ° over several individual deflecting rollers, there are smaller individual wrap angles, which reduces the risk of deformation and markings on the belt due to the inclusion of liquid metal between the roll surface and the steel belt.
  • the coating quality of steel strips can be increased considerably if a mechanical scraper is attached to each individual deflecting roller and is connected to an inert gas supply. Compared to a single large deflection roller, the scraper effectiveness is significantly increased, which results in a significant increase in material quality and an increase in the service life of both the deflection rollers and the scraper.
  • This configuration is distinguished by very particularly favorable results with regard to the product quality and the service life of the deflecting rollers and the scrapers, with a particularly favorable ratio between the investment costs of the device and the achievable product quality.
  • At least two tensioning rollers are provided in addition to the deflection rollers.
  • a steel strip B which moves in the direction of arrow A through a molten coating bath, is deflected by three deflecting rollers 1, 2 and 3 with respect to its original direction of movement by approximately 180 °, all three deflecting rollers having the same diameter.
  • Scraper holder boxes 4, 5 and 6 are arranged on the sides of the deflecting rollers 1, 2 and 3 facing away from the steel strip B, which are each provided with articulated scrapers 7, 8 and 9.
  • the steel strip B is guided over two tensioning rollers 10 and 11, which are mounted on parallel axes.
  • the tensioning rollers 10 and 11 are also provided with scraper holder boxes 12 and 13 in which articulated scraper 14 and 15 are arranged.
  • the scrapers 7, 8, 9, 14 and 15 are provided with cutting edges 16, 17, 18, 19 and 20 which sweep over the surface of the respective roller and thus prevent deposits from sticking to the rollers or remove deposits which have already formed .
  • each of the scraper holder boxes 4, 5, 6, 12 and 13 ends an inert gas supply 21 to 25, through which in the scraper holder boxes 4, 5, 6, 12 and 13 e.g. Nitrogen is supplied as an inert gas, whereby the cleaning effect of the cutting edges 16 to 20 is significantly improved.

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)
  • Coating Apparatus (AREA)
EP95115689A 1995-10-05 1995-10-05 Appareil de revêtement en continu par immersion d'une bande d'acier Withdrawn EP0767253A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95115689A EP0767253A1 (fr) 1995-10-05 1995-10-05 Appareil de revêtement en continu par immersion d'une bande d'acier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95115689A EP0767253A1 (fr) 1995-10-05 1995-10-05 Appareil de revêtement en continu par immersion d'une bande d'acier

Publications (1)

Publication Number Publication Date
EP0767253A1 true EP0767253A1 (fr) 1997-04-09

Family

ID=8219684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115689A Withdrawn EP0767253A1 (fr) 1995-10-05 1995-10-05 Appareil de revêtement en continu par immersion d'une bande d'acier

Country Status (1)

Country Link
EP (1) EP0767253A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134301A1 (fr) * 2000-03-16 2001-09-19 Kawasaki Steel Corporation Lame de rouleau immergé pour bain de galvanisation et procédé pour empêcher la formation de défauts
CN109023194A (zh) * 2018-08-24 2018-12-18 合肥集知网信息技术有限公司 一种单面镀锌钢板表面处理工艺
WO2021161923A1 (fr) * 2020-02-12 2021-08-19 日本製鉄株式会社 Dispositif d'aide à la détermination de l'état de surface d'un rouleau, dispositif d'élimination de substances étrangères sur la surface d'un rouleau et procédé d'élimination de substances étrangères sur la surface d'un rouleau

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293840A (en) * 1939-07-13 1942-08-25 Gen Motors Corp Impregnating apparatus
FR1316835A (fr) * 1961-03-03 1963-02-01 Vitkovice Zelezarny Dispositif pour l'essuyage du métal liquide en excès de la surface des cylindres de travail pour le reve6tement métallique de tôles et bandes d'acier
FR1424879A (fr) * 1965-02-17 1966-01-14 British Insulated Callenders Procédés et appareils perfectionnés destinés à enduire des fils, metalliques avec du métal
DE2610632B1 (de) * 1976-03-13 1977-09-01 Wilhelm Mueschen Verwendung eines keil- oder kurvenfoermig gestalteten abstreifers in zink-, blei-, zinn- oder aluminium-schmelzbaedern
JPS61133369A (ja) * 1984-11-30 1986-06-20 Kawatetsu Kohan Kk 溶融金属メツキ浴中ロ−ルの表面付着物の除去方法
JPH1142068A (ja) * 1997-07-29 1999-02-16 Nisshin Flour Milling Co Ltd 中華饅頭の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293840A (en) * 1939-07-13 1942-08-25 Gen Motors Corp Impregnating apparatus
FR1316835A (fr) * 1961-03-03 1963-02-01 Vitkovice Zelezarny Dispositif pour l'essuyage du métal liquide en excès de la surface des cylindres de travail pour le reve6tement métallique de tôles et bandes d'acier
FR1424879A (fr) * 1965-02-17 1966-01-14 British Insulated Callenders Procédés et appareils perfectionnés destinés à enduire des fils, metalliques avec du métal
DE2610632B1 (de) * 1976-03-13 1977-09-01 Wilhelm Mueschen Verwendung eines keil- oder kurvenfoermig gestalteten abstreifers in zink-, blei-, zinn- oder aluminium-schmelzbaedern
JPS61133369A (ja) * 1984-11-30 1986-06-20 Kawatetsu Kohan Kk 溶融金属メツキ浴中ロ−ルの表面付着物の除去方法
JPH1142068A (ja) * 1997-07-29 1999-02-16 Nisshin Flour Milling Co Ltd 中華饅頭の製造方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 328 (C - 383) 7 November 1986 (1986-11-07) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 399 (C - 632) 5 September 1989 (1989-09-05) *
PATENT ABSTRACTS OF JAPAN vol. 16, no. 144 (C - 0927) 10 April 1992 (1992-04-10) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1134301A1 (fr) * 2000-03-16 2001-09-19 Kawasaki Steel Corporation Lame de rouleau immergé pour bain de galvanisation et procédé pour empêcher la formation de défauts
US6485570B2 (en) 2000-03-16 2002-11-26 Kawasaki Steel Corporation Sink roll blade apparatus used in continuous molten metal plating apparatus and method for preventing occurrence of dents
CN109023194A (zh) * 2018-08-24 2018-12-18 合肥集知网信息技术有限公司 一种单面镀锌钢板表面处理工艺
WO2021161923A1 (fr) * 2020-02-12 2021-08-19 日本製鉄株式会社 Dispositif d'aide à la détermination de l'état de surface d'un rouleau, dispositif d'élimination de substances étrangères sur la surface d'un rouleau et procédé d'élimination de substances étrangères sur la surface d'un rouleau
JPWO2021161923A1 (fr) * 2020-02-12 2021-08-19

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