Mitsubishi Electric Corporation

Nkk Corporation

Ryuichi Maeda

Hisashi Yokoyama

Tatsuya Matsumoto

Yasutsugu Ogura

Keiichi Sakoda

Yoshinori Sunagawa

An air bypass valve device includes a caseand a valve assembly, a tenonis provided to one of the caseand the valve assembly, and a tenon grooveis provided to the other, such that the caseand the valve assemblyare united by a tenon insertion structure.

Air bypass valve device

An apparatus for pouring molten steel into a mold in continuous casting of steel according to the present invention comprises a tundish holding molten steel; a nozzle which is set at the bottom of said tundish, the nozzle having a spherical shape and through which molten steel flows out of said tundish; a sliding plate which is set at the lower portion of said nozzle and which opens and closes said nozzle; an immersion nozzle which is set under said sliding plate and through which molten steel is poured into the mold; and a block body which has a core body therein, whose outer layer is made from refractory material and has a spherical surface large enough to cover the opening of said nozzle and whose bulk specific gravity ranges between the bulk specific gravity of slag and that of molten steel. A disc-shaped flange is coupled to the spherical surface portion.

Apparatus for pouring molten steel into a mold in continuous casting of

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Tokyo, Japan

Ryuichi Maeda