Inorganic fibrous molded refractory article, method for producing inorganic fibrous molded refractory article, and inorganic fibrous unshaped refractory composition

摘要

To provide a highly bio-soluble fibrous shaped refractory article which can develop desired heat resistance without containing ceramic fibers such as aluminum silicate fibers, alumina powder and silica powder and can be provided at a low production cost and a low product cost. An inorganic fibrous shaped refractory article comprising 2 to 95 mass % of bio-soluble inorganic fibers having a dissolution ratio in a physiological saline at 40° C. of 1 mass % or more, 2 to 95 mass % of inorganic powder having a needle-like crystal structure and 3 to 32 mass % of a binder, and in particular, it is an inorganic fibrous refractory article wherein the inorganic powder having the needle-like crystal structure has an average length of 1 to 3000 μm and an aspect ratio of 1 to 1000.

主权项

1. An inorganic fibrous shaped refractory article comprising
27 to 63 mass % of bio-soluble inorganic fibers having a dissolution ratio in a physiological saline at 40° C. of 1 mass % or more, the bio-soluble inorganic fibers being alkaline-earth metal silicate fibers comprising:
20 to 40 wt % of total of CaO and MgO, and60 to 80 wt % of SiO2; 27 to 63 mass % of at least one inorganic powder having a needle-like crystal structure and selected from wollastonite powder, sepiolite powder, and attapulgite powder, and 3 to 18 mass % of a binder, wherein the article comprises the bio-soluble inorganic fibers, the inorganic powder having a needle-like crystal structure and the binder in a total amount of at least 90 mass %.