B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
149/4
B21C 43/04 (2006.01) B08B 1/02 (2006.01) C23G 3/02 (2006.01)
Patent
CA 1302850
Title: IMPROVED STEEL PICKLING APPARATUS ABSTRACT OF THE DISCLOSURE 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 varying 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 accommo- dates 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 is countercurrent to the direction of movement of steel through the bath.
586988
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Nelson Steel
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