Patent ID: 6315829
Filing Date: 2001-11-13
Classification: B05C,C23C

Abstract:
An apparatus for hot-dip coating a steel strip comprising:(a) an annealing furnace for continuously annealing the steel strip to provide an annealed steel strip, the annealing furnace having an entrance side and an exit side;(b) a coating pot having a molten metal coating bath for coating the annealed steel strip;(c) a snout through which the annealed steel strip is introduced into the molten metal coating bath, the snout having an end which is connected to the annealing furnace and the snout having another end which is immersed into the molten metal coating bath;(d) a seal device for sealing between the annealing furnace and the snout, the seal device being arranged at the exit side of the annealing furnace;(e) a discharge means for discharging a gas containing a metal vapor from the snout to outside of the snout, the metal vapor being evaporated from the molten metal coating bath in the snout;(f) a means for removing the metal vapor from the gas discharged from the snout to clean the discharged gas to provide a cleaned gas; and(g) a means for returning the cleaned gas into the annealing furnace.