| 摘要 |
PROBLEM TO BE SOLVED: To provide an alumina-chromia-magnesia refractory brick excellent in corrosion resistance, spalling resistance and slag infiltration resistance.SOLUTION: The alumina-chromia-magnesia refractory brick of the present invention is an alumina-chromia-magnesia refractory brick obtained by using an alumina raw material, a chromia raw material and a magnesia raw material as main raw materials, and contains AlO, CrOand MgO of 85 mass% or more in a total amount, CrOof 5 to 40 mass%, MgO of 4 to 20 mass%, SiOof 0.5 to 5 mass%, NaO and KO of 0.3 to 2 mass% in a total amount and inevitable impurities of 8 mass% or less, and the balance comprising AlO, the percentage of AlOin a superfine powder area of 10 μm or less being less than 20 mass%. |
