METHOD FOR SUPPLYING ZINC TO VACUUM DEPOSITION DEVICE FOR ZINC

摘要

PURPOSE:To prevent a suction pipe for molten Zn and an evaporating pan from being eroded by Zn in the stage of supplying molten Zn to a vacuum deposition chamber for Zn by filling preliminarily the molten Pb into said suction pipe and the Zn evaporating pan above said pipe and supplying the molten Zn through the inside thereof to the evaporation chamber. CONSTITUTION:Molten Zn 4 is sucked up and supplied through a suction pipe 7 from a Zn melting furnace 5 into an evaporating pan 8 in the stage of depositing by evaporation the molten Zn in the pan 8 onto the surface of a steel strip 1 which is continuously supported by the revolution of the support roll 3 in a vacuum evaporation chamber 2. The molten Pb 11 in the melting furnace 5 is preliminarily filled into the pan 8 and pipe 7 in this stage. A partition wall 5-1 to separate the molten Pb 11 and the molten Zn 4 is provided to enclose the pipe 7 and an inflow port 7-1 is provided on the Zn side (a) thereof. The molten Zn 4 is supplied to (a) from which the molten Zn is admitted through the port 7-1 into the molten Pb 11, is passed therethrough and is supplied to the pan 8 from the pipe 7 by the difference of specific gravities. Since the molten Zn does not contact with the pipe 7 and the pan 8, the pipe and pan are prevented from being eroded by the molten Zn.