| 摘要 |
PURPOSE:To obtain a refractory having extremely excellent spalling resistance and thermal shock resistance by blending a mixture having a specific composition with a sintering agent, an antioxidant and a binder, then molding and burning. CONSTITUTION:100 pts.wt. mixture comprising 10-80wt.% beta alumina, 15-85wt.% silicon carbide and 5-25wt.% carbon containing 2-10wt.% pitch heat-treated at >=400 deg.C is mixed with 2-10wt.% sintering agent and 1-5wt.% antioxidant in outer percentage. The mixture is further kneaded with a binder, molded and burnt to give the objective refractory. The refractory has low thermal conductivity, small heat loss, both alkali resistance and spalling resistance and is applicable to many uses. The refractory shows excellent protection of furnace wall and has economic efficiency of heat as refractory for furnace wall of blast furnace and embedding for stave cooler. |
