METHOD OF SUPPLYING Zn-Al ALLOY TO MOLTEN ZINC POT, METHOD OF ADJUSTING CONCENTRATION OF Al IN MOLTEN ZINC BATH, AND APPARATUS FOR SUPPLYING Zn-Al ALLOY TO MOLTEN ZINC POT

An apparatus for supplying a Zn—Al alloy to a molten zinc pot which accommodates a molten zinc bath in which a front support roll is immersed in a hot dip galvanizing line, the apparatus comprising:

• an insertion guide having a pipe shape, which has a supply portion at a lower portion and is installed between an inner wall of the molten zinc pot on a downstream side in a travelling direction of a steel sheet and the front support roll installed in the molten zinc bath;
• and
• a gas supply device which supplies inert gas into the insertion guide,
• wherein
• an installation position of the supply portion is in the molten zinc bath and at a depth within +400 mm from a lower end of the front support roll, and
• the Zn—Al alloy is supplied to the molten zinc bath from the supply portion of the insertion guide.