METHOD FOR WASHING COLD-ROLLED STEEL STRIP

PROBLEM TO BE SOLVED: To obtain a washing degree equal to or higher than the conventional technique and to prevent the breakage of a steel strip by passing through the steel sheet in a washing tank in advance to the annealing of the cold-rolled steel strip and jetting high pressure liquid onto the s...

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Bibliographische Detailangaben
Hauptverfasser:	IRI MASATO, SEKINE TATSUO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING CLEANING IN GENERAL 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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PREVENTION OF FOULING IN GENERAL PUNCHING METAL ROLLING OF METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a washing degree equal to or higher than the conventional technique and to prevent the breakage of a steel strip by passing through the steel sheet in a washing tank in advance to the annealing of the cold-rolled steel strip and jetting high pressure liquid onto the steel strip on the washing liquid. SOLUTION: The cold-rolled steel strip 7 is passed through in the high pressure water washing tank 1. The high pressure water washing tank 1 is full of water and plural pair of high pressure water getting nozzle 5 are arranged in the water. To the steel strip 7 stuck with rolling oil after cold-rolling during carrying the high pressure water having desirably 6-500k/cm .G pressure is jetted on the water of the high pressure water watching tank 1, and the oil and iron powder in the steel strip surface removed by the watching effect caused by canvitation to complete the watching. Water etc., having 6.0-8.0pH is used for the high pressure liquid. The steel strip 7 after washing is squeezed out of the water stuck on the steel strip surface with wringer rolls 2 and dried with a drier 3 and fed to a following continuous annealing equipment 12.