Patent ID: 9499875
Filing Date: 2016-11-22
CPC Classification: B05C,C21D,C22C,C23C,F27B,F27D

Claim Text:
1. A steel strip continuous annealing device that has a vertical annealing furnace in which a heating zone, a soaking zone, and a cooling zone are arranged in the stated order, and anneals a steel strip passing through the zones in the order while being conveyed in a vertical direction in the vertical annealing furnace, wherein adjacent zones communicate with each other through a communicating portion that connects upper parts or lower parts of the respective zones, a communicating portion between the heating zone and the soaking zone connects lower parts of the respective zones, and a communicating portion between the soaking zone and the cooling zone connects upper parts of the respective zones, a gas delivery port is provided in each of the heating zone, the soaking zone, and the cooling zone, and the gas delivery port in the heating zone is provided only in an upper part of the heating zone, and the gas delivery port in each of the soaking zone and the cooling zone is provided only in a position opposite in the vertical direction to a position of a communicating portion with an immediately preceding zone in the order in which the steel strip passes through.