Nippon Crucible Co., Ltd.

Hideaki Ohashi

Tadao Sasaki

Nobuyuki Oka

Norio Honda

Hirokazu Asada

Hiroyuki Suzuki

Akio Ueda

The invention provides a vessel for molten metal comprising a vessel body formed of an alumina-silica-based material, and a protective layer formed of a silicon nitride- alumina-based material provided on the inner surface of the vessel body, wherein the material for the vessel body is adjusted to have an alumina content x of 72 to 95 parts by weight per 100 total parts by weight of alumina and silica, and the material for the protective layer is adjusted to have a silicon nitride content y per 100 total parts by weight of silicon nitride and alumina in such a manner that y applies to the following formulae: (1) y&#x3c;&#x2212;1.1x+128 and (2) y&#x3e;&#x2212;0.5x+62.5. The present invention provides a vessel for molten metal having excellent durability and corrosion resistance against hot molten metal.

Vessel for molten metal

A colored refractory material for lining an instrument/apparatus used at a high temperature is formed by mixing a powder of a raw material containing ceramics with a coloring agent and kneading with a liquid using a binder. The refractory material is put in lining for a portion being in contact with a high temperature molten substance or being exposed to a high temperature atmosphere, and is dried by heating while adjusting a temperature and a heating time on the basis of color change on the surface of the refractory material.

Method of drying lining refractory material for instrument/apparatus

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Higashiosaka, Japan

Hideaki Ohashi