METHOD FOR FEEDING ZN-AL ALLOY INTO MOLTEN ZINC POT, METHOD FOR ADJUSTING AL CONCENTRATION IN MOLTEN ZINC BATH, AND DEVICE FOR FEEDING ZN-AL ALLOY INTO MOLTEN ZINC POT

摘要

Provided is a method for feeding a Zn-Al alloy into a molten zinc pot that holds a molten zinc bath in a hot dip galvanization line. The method of feeding the Zn-Al alloy into the molten zinc pot comprises a feeding step for feeding the Zn-Al alloy from a feeding unit disposed on the lower part of pipe-shaped insertion guide. The feeding unit is immersed between an inner wall on the downstream side of the molten zinc pot relative to the direction of advancement of a steel plate, and a front support roll disposed in the molten zinc bath, to a depth within ±400 mm from the lower edge of the front support roll. The interior of the insertion guide is pressurized by an inert gas, preventing intrusion of the molten zinc bath into the interior of the insertion guide.