Nippon Steel Sumitomo Metal Corporation

Mikio Kawamura

Yu Yamauchi

Masaaki Omodaka

Hideki Nishimura

Koichi Nishizawa

Noboru Furuta

Tsukasa Oyama

Makoto Kusama

Kuniaki Yamamoto

Tokuhiro Mizuno

A method of supplying a Zn&#x2014;Al alloy to a molten zinc pot which accommodates a molten zinc bath in a hot dip galvanizing line, includes: supplying the Zn&#x2014;Al alloy from a supply portion provided at a lower portion of an insertion guide having a pipe shape, in which the supply portion is immersed between an inner wall of the molten zinc pot on a downstream side in a travelling direction of a steel sheet and a front support roll installed in the molten zinc bath at a depth within &#xb1;400 mm from a lower end of the front support roll, and an inside of the insertion guide is pressurized by inert gas to prevent the molten zinc bath from advancing to the inside of the insertion guide.

Apparatus for supplying Zn&#x2014;Al alloy to molten zinc pot

Method of supplying Zn&#x2014;Al alloy to molten zinc pot, method of adjusting concentration of Al in molten zinc bath, and apparatus for supplying Zn&#x2014;Al alloy to molten zinc pot

A method and device for removing metal fumes inside a snout in a continuous hot-dip plating plant are provided, which are capable of reliably removing metal fumes causing unplating from the snout without heating an outer wall of the snout. Heated inert gas is supplied to an inside of a snout which is formed between a continuous annealing furnace outlet and a hot-dip metal plating bath. Atmospheric temperature of the inside of the snout and temperature of an inner wall of the snout are maintained, gas having a flow rate greater than a gas supply flow rate is exhausted. A gas stream is formed which flows from the continuous annealing furnace to a surface of the hot-dip metal plating bath, which prevents quality defect from occurring caused by metal fumes generated from molten metal surface.

Method and device for removing metal fumes inside snout in continuous hot-dip plating plant

A flow regulating member of a hot dip coating tank which is able to suppress stir-up of bottom dross, characterized by being provided with flow regulating member horizontal plates which are respectively arranged horizontally from below two side end parts of a sink roll, which is arranged inside of a coating tank in a rotatable manner, toward outside directions of the sink roll and side members which are arranged at positions separated from the two ends of the sink roll, which extend upward from the end parts of the respective horizontal plates, and in which large numbers of dispersion holes are formed, the side members having an aperture ratio of 20 to 80%, and the dispersion holes having a hole diameter of 5 to 50 mm.

Flow regulating member of hot dip coating tank and continuous hot dip coating system

A flow regulating member of a hot dip coating tank which can suppress stir-up of bottom dross, characterized by being provided with horizontal plates which are respectively arranged horizontally from below two side end parts of a sink roll, which is arranged inside of a coating tank in a rotatable manner, toward outside directions of the sink roll and louvers which are arranged above from the end parts of the respective horizontal plates at positions separated from the two ends of the sink roll and which have flow direction changing members which are slanted so that their heights become gradually higher toward the wall surface sides of the coating tank.

Growing community of inventors

Tokyo, Japan

Mikio Kawamura