STEEL-STRIP PRODUCTION METHOD, AND STEEL STRIP

WIPO Patent Application WO/2016/024536

A1

The present invention provides a steel-strip production method with which a hot-dip-plated steel strip and a cold-rolled steel strip can be produced in the same facility, while inhibiting discharge of the atmospheric gas in a continuous annealing furnace to the furnace exterior, and infiltration of atmospheric air into the furnace. A steel-strip production method according to the present invention is characterized in that switching between a hot-dip-plated steel strip production means and a cold-rolled steel strip production means is performed. The hot-dip-plated steel strip production means is provided with: a continuous annealing furnace (2); a snout (6) connected to the continuous annealing furnace (2); a contact-type seal plate device (10) and non-contact-type seal roll devices (20) which are installed at the entrance side of the snout (6) in sequence along the conveyance direction of a steel strip (S); a movable hot-dip-plating tank (5); and a sink roll (31) which changes the passing direction of the steel strip (S) passed through the snout (6). The hot-dip-plated steel strip production means produces a hot-dip-plated steel strip by introducing, into the hot-dip-plating tank (5), the steel strip (S) continuously annealed in the continuous annealing furnace (2). In the cold-rolled steel strip production means, a deflector roll is installed in the position of the sink roll (31), and a cold-rolled steel strip is produced by being conveyed so as to not pass through the hot-dip-plating tank (5).

IIDA SACHIHIRO (JP)

PCT/JP2015/072473

February 18, 2016

August 07, 2015

Click for automatic bibliography generation  

JFE STEEL CORP (JP)

C21D9/56; C21D1/74; C23C2/00

JP2590152B2	1997-03-12
JPS6393829A	1988-04-25

See also references of EP 3181708A4

SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)

View/Download PDF      PDF Help

Previous Patent: EXHAUST PURIFICATION DEVICE

Next Patent: STEEL-STRIP PRODUCTION APPARATUS