| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for improving a furnace atmosphere in a continuous heat treatment furnace for advantageously producing a steel sheet excellent in plating adhesion by lowering a dew point of a furnace atmosphere gas in a continuous annealing furnace.SOLUTION: A method for improving a furnace atmosphere in a continuous annealing furnace includes: taking a gas being a part of the furnace atmosphere into a refiner 7 provided outside of the furnace for lowering a dew point of the furnace atmosphere of the continuous annealing furnace 3 for a steel sheet 1; and blowing the gas into the furnace again after dehumidification and deoxidation, wherein a plurality of furnace gas intakes to the refiner are arranged in the continuous annealing furnace, and selectively used. |
