DEVICE FOR HEATING MOLTEN ZINC AND REMOVING DROSS IN PLATING TUB BY USING ALTERNATING CURRENT ELECTROMAGNETIC FIELD

摘要

PURPOSE: A device for heating molten zinc and removing a dross in a coating tub is provided to heat molten zinc and to efficiently divide and separate a dross by feeding an alternating magnetic field and an alternating current and using an electromagnetic field. CONSTITUTION: Molten zinc contaminated with dross is taken out from the bottom of a coating tub(10) by using an electromagnetic pump(15). A current is led to in a flow direction of the molten zinc with an alternating current feeding device(3) while sending the molten zinc to an upper part through a passage(16). The magnetic field is electrically fed in a vertical direction of the current by using an alternating electromagnet(16). When the molten zinc is passed through an electromagnetic volume part by the reaction of the current and magnetic field, the dross is moved and separated in the opposite direction of the electromagnetic force. Then, the dross passes through the electromagnetic part is separated by a dross avoiding tube(17) and is collected in a dross collection tub(18). Thus, the cleaned molten zinc returns to the coating tub through a cleaned molten zinc passage(19).