Carbon-containing refractory and process for producing the same

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 35/532 (2006.01) C04B 35/01 (2006.01) C04B 35/636 (2006.01) C04B 35/66 (2006.01)

Patent

CA 2212726

The object of the invention is to provide carbon-containing refractories which give off little decomposition gas having an offensive odor, exhibit excellent spalling resistance, and are equal or superior in kneading properties and molding properties to the refractories containing a phenolic resin as a binder; and a process for producing the same. To accomplished the object, the invention is characterized by replacing a conventionally employed phenolic resin binder with saccharified starch and/or reduced saccharified starch, a binder comprising 40% to 80% by weight of saccharified starch and/or reduced saccharified starch and 20% to 60% by weight of water, or a binder comprising 40% to 80% by weight of saccharified starch and/or reduced saccharified starch, 1% to 25% by weight of water, and 5% to 50% by weight of an alcohol having a boiling point of not lower than 80%C.

La présente invention concerne un produit réfractaire carboné ne dégageant que peu de gaz de décomposition d'odeur étrange, et doté d'une excellente résistance à l'effritement ainsi que d'aptitudes au malaxage et au moulage équivalentes ou supérieures à celle d'une résine phénolique. L'invention concerne également un procédé de production de ce produit réfractaire. Ce produit réfractaire est caractérisé en ce que du sucre d'amidon et/ou du sucre d'amidon réducteur est/sont utilisés comme liant en lieu et place de la résine phénolique employée dans les techniques antérieures. En l'occurrence, pour la production du produit réfractaire de l'invention on utilise: - un liant comprenant 40 à 80 % en poids de sucre d'amidon et/ou de sucre d'amidon réducteur et de 20 % à 60 % d'eau, ou - un liant comprenant 40 à 80 % en poids de sucre d'ami don et/ou du sucre d'amidon réducteur, et 1 à 25 % d'eau, et 5 à 50 % en poids d'un alcool ayant un point d'ébullition de 80 DEG C ou plus.

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