| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-insulating refractory composition in which a porous heat-insulating aggregate consisting of a hexagonal crystal of a composition SCA6 (CaO.6Al2O3) [SLA-92 aggregate from Alcoa] is used as a component and which is capable of exhibiting stable strength irrespective of the ambient temperature of construction work. SOLUTION: In this composition, the SLA-92 aggregate is used as an heat- insulating aggregate and hydraulic alumina is used as a binder. The content of SiO2 as a chemical component expressed in terms of oxide is <0.5 wt.% on the basis of the weight of the whole composition. |
