Device for removing foreign material from molten metal surface in steel sheet hot-dip galvanizing process

Abstract

A device for removing foreign material from a molten metal surface in a steel sheet hot-dip galvanizing process, of the present invention, comprises: a snorkel part of which the end portion is submerged under the molten metal surface of a hot-dip galvanizing bath so as to encompass a steel sheet inserted into the hot-dip galvanizing bath, in order to prevent the oxidization thereof; a snout including a dam unit having a dam forming part which encompasses the steel sheet from the end portion of the snorkel part so as to be spaced a predetermined gap from same, and which allows a molten galvanizing solution inside the hot-dip galvanizing bath to flow over toward the inner peripheral surface of the snorkel part so as to prevent the foreign material that falls onto the molten metal surface inside the snorkel part from attaching to the steel sheet; and a molten zinc discharge unit which is provided inside the snorkel part so as to pump, toward the molten metal surface inside the hot-dip galvanizing bath, the molten galvanizing solution having flowed over the dam forming part of the damp unit, thereby preventing the foreign material included in the molten galvanizing solution, having flowed over the dam forming part, from mixing into the molten galvanizing solution inside the hot-dip galvanizing bath and re-polluting the molten galvanizing solution or flowing into the snorkel part again.

Description

technical field [0001] The present invention relates to an apparatus for removing impurities from the surface of molten metal, and more particularly, to an apparatus for removing impurities from the surface of molten metal in a hot-dip galvanizing process for steel sheets, capable of preventing adhesion of impurities in vent pipe parts To the surface of the galvanized steel sheet, thereby improving the galvanized quality of the steel sheet. Background technique [0002] Hot-dip galvanized steel sheets have been widely used for general construction materials and outer panels for vehicles requiring strict quality control due to their excellent corrosion resistance. In particular, the outer panels for vehicles, which have been increasingly used in recent years, require strict surface quality control since corrosion resistance is regarded as an important surface property. [0003] Meanwhile, while continuously passing through a pay-off reel (not shown) and a welding machine (no...

AI Technical Summary

Problems solved by technology

Therefore, there is a problem in that the galvanized quality of the steel sheet is lowered

[0010] As described above, the apparatus for removing impurities from the surface of molten metal according to the prior art has a structure that prevents impurities such as ash from adhering to the surface of a galvanized steel The surface of the molten metal in the nozzle part discharges impurities

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