| 摘要 |
PROBLEM TO BE SOLVED: To reliably set the temperature of a succeeding plate at the furnace outlet to be within the tolerance of the target plate temperature even when the temperature of a floater type continuous annealing furnace does not reach the set value. SOLUTION: When a connection part of a preceding plate to a succeeding plate passes through a furnace inlet, a furnace temperature, a nozzle pressure and the line speed of the succeeding plate obtained from a plate temperature control model formula with the plate temperature, the furnace temperature inlet as parameters are reset. Until the furnace temperature reaches the furnace inlet as parameters are reset. Until the furnace temperature reaches the set value of the furnace temperature, the first furnace outlet plate temperature of the succeeding plate is obtained by substituting the measured furnace temperature, the measured nozzle pressure and the set line speed in the model formula, the second furnace outlet plate temperature is obtained by substituting the measured furnace temperature, the measured nozzle pressure, and the temporarily determined temporary line speed in the model formula, the line speed of the succeeding plate for achieving the target plate temperature of the succeeding plate is obtained from the first furnace outlet plate temperature and the second furnace outlet plate temperature, the line speed and the temporary line speed, and the temperature is controlled so as to achieve the obtained line speed.
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