Patent ID: 8714104
Filing Date: 2014-05-06
Classification: B05C,C21D,C23C,F27B

Abstract:
1. A dual-purpose facility of continuous hot-dip coating and continuous annealing which is configured so as to be switched between a continuous hot-dip coated material production line in which a steel strip annealed in an annealing furnace is immersed into a hot-dip coating bath and a continuous annealed material production line in which the steel strip bypasses the hot-dip coating bath and is guided out of the annealing furnace into an air outside the furnace, the dual-purpose facility comprising: a gas discharge path that discharges atmosphere gas in the annealing furnace from a gas discharge port provided in an outlet side of the annealing furnace out of the annealing furnace; a path opening and closing unit for opening and closing the gas discharge path; and a cyclone that is disposed in the gas discharge path and removes metal fumes contained in the atmosphere gas by making the atmosphere gas have a rotational flow, wherein the path opening and closing unit opens the gas discharge path when the dual-purpose facility is used as the continuous hot-dip coated material production line and closes the gas discharge path when the dual-purpose facility is used as the continuous annealed material production line.