Weirton Steel Corporation

Danieli Wean, Division of Danieli Corporation

Timothy L Cox

John Lodewyk Loth

Walter A Wilson

Howard Snyder

Anthony J Santilli

Stephen L Feldbauer

Richard K Lordo

A recirculating fume scrubber system in which fume is evolved from an aqueous bath in a process vessel, such as an HCl pickling tank, and the evolved fume is scrubbed with water and then the scrubbed gas is divided into two portions, one of which is released to a stack vented to atmosphere and the other portion is recirculated to the scrubber.

Recirculating fume scrubber system

A coating control system is provided enabling continuous operations, free of interruption for coating control purposes, while achieving desired coating weight and thickness profile for the various gages, widths and coating specifications encountered on a given continuous strip production line. In each of a pair of elongated pneumatic dies, a pressurized gas jet is controllably shaped and directed by flow-control means internally-mounted of each pneumatic die to impinge against its respective substrate coated surface with its major directional component of force being controlled to be perpendicularly transverse to the travel path of the coated strip across its full width. Adjustment of such internally-mounted means is coordinated with control of gas pressure supply and/or adjustment of die positioning means to maintain desired coating weight and coating profile across the width of the strip. Pneumatic and other crown-control measures of the invention are exercised along the centerline of the strip enabling production of continuous-strip galvanized steel product having improved tracking and handling properties.

Coating control apparatus

A coating control system is provided enabling continuous operations, free of interruption for coating control purposes, while achieving desired coating weight and thickness profile for the various gages, widths and coating specifications encountered on a given continuous strip production line. In each of a pair of elongated pneumatic dies, a pressurized gas jet is controllably shaped and directed by flow-control means internally-mounted of each pneumatic die to impinge against its respective substrate coated surface with its major directional component of force being controlled to be perpendicularly transverse to the travel path of the coated strip across its full width. Adjustment of such internally-mounted means is coordinated with control of gas pressure supply and/or adjustment of die positioning means to maintain desired coating weight and coating profile across the width of the strip. Pneumatic and other crown-control measures of the invention are exercised along the centerline of the of the strip enabling production of continuous-strip galvanized steel product having improved tracking and handling properties.

Continuous strip coating control methods

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Weirton, WV, United States of America

Timothy L Cox