| 摘要 |
Provided is a large-scale continuous annealing device that is capable of replacing the atmosphere in a furnace in a short time, and anneals a steel strip by multiple passes in a vertical annealing furnace. This continuous annealing device for a steel strip has a vertical annealing furnace (10) in which a heating zone (14), a soaking zone (16), and a cooling zone (18) are arranged parallel to one other in the stated order, and anneals a steel strip (P) that passes through the zones (14, 16, 18) in the stated order while being conveyed vertically inside the vertical annealing furnace (10). The continuous annealing device is characterised in that: the heating zone (14), the soaking zone (16), and the cooling zone (18) are in communication via atmosphere separation sections (36); and in each of the heating zone (14), the soaking zone (16), and the cooling zone (18), one of a gas discharge port (38) and a gas exhaust port (40) is positioned at the upper section, and the other is positioned at the lower section. |
