Steel pickling apparatus

Details Steel pickling apparatus Steel pickling apparatus

1987-10-14

1989-07-25

Sneed, H. M. S.

Cleaning and liquid contact with solids

Processes

Longitudinally traveling work of bar, strip, strand, sheet...

134 251, 134 254, 134 28, 134 26, 134114, 134 64R, B08B 102

Patent

active

048503789

ABSTRACT:
An improved bath for use in pickling of steel strip manufactured in a hot strip mill. Pickling fluid, usually acid, is supplied to the bath through apertures in the sidewalls of the bath. A plurality of apertures are provided spaced at differing heights from the bottom of the bath so that acid may be supplied to the bath at various fluid depths. Advantageously, the bath comprises downwardly and inwardly sloping surfaces and the outlets of the apertures are elliptical in shape. In this manner the bath accommodates steel strip of varying widths while ensuring addition of acid to the bath adjacent the edges of the steel strip. Improved agitation of the fluid in the bath enhances the throughput speed of steel strip. To further enhance agitation the inlet apertures are arranged to introduce pickling fluid in a direction which so countercurrent to the direction of movement of steel through the bath.

REFERENCES:
patent: 4592784 (1986-06-01), Ghizzi
patent: 4707191 (1987-11-01), Martinai et al.

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