WO2003018859A3 - Apparatus for controlling coating weight on strip in continuous galvanizing process - Google Patents

Apparatus for controlling coating weight on strip in continuous galvanizing process Download PDF

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Publication number
WO2003018859A3
WO2003018859A3 PCT/KR2002/001591 KR0201591W WO03018859A3 WO 2003018859 A3 WO2003018859 A3 WO 2003018859A3 KR 0201591 W KR0201591 W KR 0201591W WO 03018859 A3 WO03018859 A3 WO 03018859A3
Authority
WO
WIPO (PCT)
Prior art keywords
steel strip
coating
coating weight
present
air
Prior art date
Application number
PCT/KR2002/001591
Other languages
French (fr)
Other versions
WO2003018859A2 (en
Inventor
Hong-Kook Chae
Original Assignee
Posco
Res Inst Ind Science & Tech
Hong-Kook Chae
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
Priority claimed from KR10-2001-0051242A external-priority patent/KR100530054B1/en
Priority claimed from KR10-2001-0082223A external-priority patent/KR100530074B1/en
Priority claimed from KR1020010082222A external-priority patent/KR100815684B1/en
Application filed by Posco, Res Inst Ind Science & Tech, Hong-Kook Chae filed Critical Posco
Priority to US10/433,251 priority Critical patent/US20040050323A1/en
Priority to JP2003523702A priority patent/JP2004522002A/en
Publication of WO2003018859A2 publication Critical patent/WO2003018859A2/en
Publication of WO2003018859A3 publication Critical patent/WO2003018859A3/en

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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
    • 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

Abstract

The present invention relates to an apparatus for controlling coating weight on a steel strip in a continuous hot dip galvanizing process, in which the coating weight is controlled through air wiping after the steel strip passes through a molten zinc coating bath. More particularly, the apparatus according to the present invention keeps the steel strip equidistant from each air knife, uniformly distributes a spray pressure of the air knives in a widthwise direction of the steel strip, and minimizes variation in coating weights on both surfaces of the steel strip. Furthermore, when two steel strips that are different in thickness are continuously hot dip galvanized, the apparatus according to the present invention predicts the movement of the passing line of the steel strips and accurately controls the positions of the air knives. As a result, product deficiencies such as insufficient coating can be reduced and zinc loss due to excess coating can be minimized.
PCT/KR2002/001591 2001-08-24 2002-08-23 Apparatus for controlling coating weight on strip in continuous galvanizing process WO2003018859A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/433,251 US20040050323A1 (en) 2001-08-24 2002-08-23 Apparatus for controlling coating weight on strip in continuous galvanizing process
JP2003523702A JP2004522002A (en) 2001-08-24 2002-08-23 Apparatus for controlling strip weight in continuous galvanizing process

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR2001/51242 2001-08-24
KR10-2001-0051242A KR100530054B1 (en) 2001-08-24 2001-08-24 Apparatus for controlling distance of an air knife in continuous galvanizing line
KR10-2001-0082223A KR100530074B1 (en) 2001-12-21 2001-12-21 Air knife distance control apparatus and method for compensating the movement of strip passing line in continuous galvanizing line
KR1020010082222A KR100815684B1 (en) 2001-12-21 2001-12-21 Adaptive coating weight controller in continuous steel strip galvanizing process
KR2001/82222 2001-12-21
KR2001/82223 2001-12-21

Publications (2)

Publication Number Publication Date
WO2003018859A2 WO2003018859A2 (en) 2003-03-06
WO2003018859A3 true WO2003018859A3 (en) 2003-11-13

Family

ID=27350508

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2002/001591 WO2003018859A2 (en) 2001-08-24 2002-08-23 Apparatus for controlling coating weight on strip in continuous galvanizing process

Country Status (3)

Country Link
JP (1) JP2004522002A (en)
CN (1) CN1610763A (en)
WO (1) WO2003018859A2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1015581A3 (en) * 2003-06-25 2005-06-07 Ct Rech Metallurgiques Asbl Steel strips ripples type thickness variation measuring and correcting method, involves modifying whirling parameters of strip when preset tolerance limit is attained to reduce thickness variation and maintain constant thickness of strip
EP2279278B1 (en) 2008-05-15 2019-12-25 Primetals Technologies France SAS System and method for guiding a galvanising product wiping device
EP2140944A1 (en) * 2008-07-03 2010-01-06 Linde AG Adjustable baffles for gas wiping
US8931431B2 (en) * 2009-03-25 2015-01-13 The Regents Of The University Of Michigan Nozzle geometry for organic vapor jet printing
CN101660111B (en) * 2009-10-14 2012-02-01 中冶连铸技术工程股份有限公司 Level control device used for knife-type nozzle
CN101967617B (en) * 2010-10-15 2012-04-25 宝钢股份黄石涂镀板有限公司 Automatic air knife tracking and adjusting device
CN104109829B (en) * 2013-04-19 2016-08-03 宝山钢铁股份有限公司 Continuous galvanizing line air knife working width control method
CN106555144B (en) * 2015-09-30 2018-08-31 宝山钢铁股份有限公司 The hot galvanized layer thickness control system and method for continuous variable thickness band
CN106167887B (en) * 2016-07-04 2018-07-06 浙江中控研究院有限公司 Hot dip galvanizing coating thickness fast switch over method and system away from dynamic compensation based on knife
CN108160408B (en) * 2016-12-05 2022-04-29 塔工程有限公司 Control device for coating head unit
CN107447176A (en) * 2017-09-22 2017-12-08 江苏大力神科技股份有限公司 A kind of double air knife zinc flower control devices
JP7145754B2 (en) * 2018-12-28 2022-10-03 株式会社日立製作所 Plating deposition control device and control method
JP7145755B2 (en) * 2018-12-28 2022-10-03 株式会社日立製作所 Plating deposition control device and control method
KR20220038451A (en) * 2019-08-29 2022-03-28 아르셀러미탈 Edge build-up measurement
CN110793333B (en) * 2019-10-09 2021-07-13 河钢股份有限公司 Annealing furnace inclined slideway liquid level control device for improving coating quality

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346129A (en) * 1981-03-02 1982-08-24 Republic Steel Corporation Method and apparatus for thickness control of a coating
US5332437A (en) * 1992-04-17 1994-07-26 Clecim Air knife device for regulating a metal deposit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346129A (en) * 1981-03-02 1982-08-24 Republic Steel Corporation Method and apparatus for thickness control of a coating
US5332437A (en) * 1992-04-17 1994-07-26 Clecim Air knife device for regulating a metal deposit

Also Published As

Publication number Publication date
WO2003018859A2 (en) 2003-03-06
JP2004522002A (en) 2004-07-22
CN1610763A (en) 2005-04-27

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