Abstract: A steel strip continuous annealing device has a vertical annealing furnace 10 in which a heating zone 14, a soaking zone 16, and a cooling zone 18 are arranged in this order, and anneals a steel strip P passing through the zones 14, 16, and 18 in the order while being conveyed in the vertical direction in the vertical annealing furnace 10. The heating zone 14, the soaking zone 16, and the cooling zone 18 communicate through an atmosphere separation portion 36. One of a gas delivery port 38 and a gas discharge port 40 is positioned in an upper part and the other one of the gas delivery port 38 and the gas discharge port 40 is positioned in a lower part in each of the heating zone 14, the soaking zone 16, and the cooling zone 18.

Abstract: A steel strip continuous annealing device has a vertical annealing furnace 10 in which a heating zone 14, a soaking zone 16, and a cooling zone 18 are arranged in this order, and anneals a steel strip P passing through the zones 14, 16, and 18 in the order while being conveyed in the vertical direction in the vertical annealing furnace 10. The heating zone 14, the soaking zone 16, and the cooling zone 18 communicate through an atmosphere separation portion 36. One of a gas delivery port 38 and a gas discharge port 40 is positioned in an upper part and the other one of the gas delivery port 38 and the gas discharge port 40 is positioned in a lower part in each of the heating zone 14, the soaking zone 16, and the cooling zone 18.

Abstract: An apparatus for manufacturing a molten metal coated steel strip configured to control the amount of a metal coated on surfaces of a steel strip by blowing a gas from gas wiping nozzles to the surfaces of the steel strip continuously drawn from a molten metal, includes molten-metal-reducing members arranged on both sides of the steel strip below the surface of the molten metal in the coating bath to face the steel strip, each of the molten-metal-reducing members having a length equal to or longer than the steel-strip width, and shields arranged between the molten-metal-reducing members each extending along an extension of a corresponding one of the surfaces of the steel strip.

Abstract: An apparatus for producing a hot-dip metal coated steel strip configured to control the thickness of a coating metal by blowing a gas from wiping nozzles to a steel strip continuously drawn from a coating bath, the wiping nozzles being arranged above the coating bath and facing the respective surfaces of the steel strip, and including rectifying plates arranged on the respective sides of the steel strip located above submersed support rolls and below the surface of a molten metal while not being in contact with the steel strip and the submersed support rolls, each of the rectifying plates having a roll-covering portion and a steel-strip-facing portion, each of the roll-covering portions being arranged to cover ¼ or more of the periphery of a corresponding one of the submersed support rolls near to the molten metal surface, each of the steel-strip-facing portions arranged above a corresponding one of the submersed support rolls and facing the steel strip, and the steel-strip-facing portions of the rectifying p