PICKLING DEVICE AND PAUSED PICKLING OPERATION METHOD

To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank (10) for storing acid solution and for pickling a steel strip (S) by allowing the steel strip to travel...

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Bibliographische Detailangaben
Hauptverfasser:	NAKATSUKA, Ryusuke, NAKAMURA, Koichi, TSUJI, Kosei, SUEMORI, Hideaki
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY
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Beschreibung
Zusammenfassung:	To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank (10) for storing acid solution and for pickling a steel strip (S) by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank (43) for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation unit (40) configured to circulate the acid solution between the pickling tank and the acid-solution storage tank; and a control device (50) configured to control the acid-solution circulation device (40) to maintain a liquid level of the acid solution in the pickling tank at a level below a traveling height (h) of the steel strip.