| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact manufacturing apparatus of a hot-rolled steel strip for performing quick cooling from the tip of the steel strip and coiling it in a very short period of time while stably passing the tip part of a very thin hot-rolled steel strip. SOLUTION: A passed strip cooling device 6 is positioned at a place where a run out table 4 is 5 to 13 m away from the final finishing mill 3x. For a 1st coiler 5a, the inlet-side pinch roll of the coiler is arranged at the position of 22 m from the final finishing mill 3x and, for the 2nd coiler 5b, the inlet-side pinch roll of the coiler is arranged at the position of 28 m from the final finishing mill 3x. The cooling device 6 is composed of round tube laminar nozzles 11 arranged at the pitch of 50 mm and installed so as to enclose the steel strip from the upper part and the lower part of the pass line of the steel strip. The cooling water is respectively jetted at the flow rate of water per unit area of 3000L/(min.m<SP>2</SP>) from these upper and lower round tube laminar nozzles 11 on the upper and back surfaces. COPYRIGHT: (C)2003,JPO
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