Toshiba Ceramics Co., Ltd.

Nippon Steel Corporation

Yoshiro Aiba

Takashi Watanabe

Kazuhide Kawai

Kazumi Arakawa

Masuo Sugie

Nobiru Komatsu

Haruo Ootuka

Koji Kurihara

Kaoru Nishikido

A method for making a casting nozzle, includes mixing a main casting nozzle material 70-95% by weight and electrofused aggregates 5-30% by weight, the electrofused aggregates consisting essentially of ZrO.sub.2 30-60% by weight, Al.sub.2 O.sub.3 20-50% by weight, SiO.sub.2 10-20% by weight and SiC 5-40% by weight together with a binder, thereby to make a mixture, forming the mixture in the shape of a casting nozzle thereby to make a formed body, and sintering the formed body.

Casting nozzle

A porous ceramic structure adapted in a molten metal container in a way such that the structure pierces the wall of the container for introducing a gas thereinto. The structure comprises a main body made of a porous ceramic material and having a recession on the side adjacent to the outer surface of the container and a sub-body made of a porous ceramic material fitted in the recession of the main body. This ceramic structure enables the operator to make timely judgment for its replacement with new one before it breaks down to cause leakage of molten metal from its container.

Porous ceramic structure

Growing community of inventors

Anjo, Japan

Yoshiro Aiba