| abstract |
An alumina cement composition that has both fluidity retention during high-temperature construction and good strength development, and excellent storage stability, and an amorphous refractory using the same. The mineral composition is CaO · Al 2 O 3 , CaO · 2Al 2 O 3 and 12CaO · 7Al 2 O 3 , and the chemical components are CaO 25 to 45 mass% and Al 2 O 3 75 to 55 mass%. Alumina cement, carboxylic acid, alkali metal carbonate, boric acid, polyacrylic acid and / or polymethacrylic acid, phosphate and stearin comprising 20 to 95 parts by weight of clinker and 80 to 5 parts by weight of α-Al 2 O 3 The object of the present invention is achieved by an alumina cement composition containing acids. [Selection figure] None |