| 摘要 |
PROBLEM TO BE SOLVED: To provide a plate temperature cooling control method in a cooling zone capable of suppressing insufficient cooling or supercooling of a steel plate traveling through the cooling zone of a continuous heat treatment equipment. SOLUTION: In the plate temperature cooling control method to perform feed-forward control of the number of rotations of a cooling blower 4 by interlocking the plate passing schedule with information on the target plate temperature on the cooling zone inlet side, the target plate temperature on the cooling zone outlet side, the plate thickness, the plate width and the plate passing speed during the actual operation, and information on the welding point tracking, the plate thickness measured by a plate thickness meter 10 is taken in before the steel plate 1 is introduced in the cooling zone 2, the mean actual plate thickness is calculated for each divided section of the coil, and the mean actual plate thickness is used for the operation of the number of rotation of the blower for the plate temperature control during the feed-forward operation when the steel plate 1 is cooled by the cooling blower 4 in the cooling zone 2 of the continuous heat treatment equipment of the steel plate. The heat balance of the cooling zone 2 such as the cooling heat-removal amount of the steel plate 1, the furnace body heat radiation amount, and the heat exchange in a heat exchanger 6 is calculated, and the constant resolution of the number of rotations of the blower which must be stabilized when the temperature is converged to the plate temperature on the target output side is operated in advance to form the command value of the number of rotations of the blower. COPYRIGHT: (C)2005,JPO&NCIPI
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