Alkali-resistant non-crystalline inorganic composition and fiber thereof

Abstract

[Object] A high value-added material having excellent alkali resistance is developed by effectively utilizing waste material discharged from coal-fired power plants and copper slag discharged from copper smelters. [Solution] With regard to a non-crystalline inorganic composition containing silica (SiO2), iron oxide (Fe2O3), alumina (Al2O3), and calcium oxide (CaO) as main components, when i) a total content of silica, alumina, and calcium oxide is set to be 50% by mass or more and 75% by mass or less; ii) a content of iron oxide is set to be 26% by mass or more and less than 40% by mass; and iii) iron oxide is derived from a non-crystalline raw material, an inorganic composition that can be melt-spun and has excellent alkali resistance is obtained. In this inorganic composition, most of the raw materials can be derived from coal ash and copper slag.

Dependencies are inferred from the claim text.