| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a porous fire resistant heat insulating board having fire resistance (heat resistance) not to be burnt or softened and melted at 1,200°C at least for 3 hrs and simultaneously having excellent heat insulating property and suitable as a building materials or the like. <P>SOLUTION: A raw material containing 45-75% coal ash, 5-20% waste glass and 15-40% magnesia and/or alumina by weight is pulverized granular and mixed to be homogeneous, and the mixed raw material is heated and melted at 1,100-1,300°C for 30-240 min and is quenched or naturally cooled. <P>COPYRIGHT: (C)2008,JPO&INPIT |
