| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing lightweight alumina insulating firebrick in which the alumina content is 98 mass% or more, and the bulk specific gravity is 1.0 or less and which has both high corrosion resistance and low thermal conductivity, using slip casting or extrusion.SOLUTION: The method includes adding a pore-application material such as polystyrene beads and water to alumina powder, adding 1 to 80 mass% of an aluminum-containing inorganic compound such as hydraulic alumina which is changed to alumina on firing as molding plasticizer to the amount of all the materials, and subjecting the slurry obtained by kneading to slip casting or extrusion, and then firing the resulting material at 1,100 to 1,700°C to obtain the lightweight alumina insulating firebrick. |
