| 摘要 |
PURPOSE:To obtain the alumina sticking preventing material used for substitute for CaO and CaZrO3 which are used hitherto. CONSTITUTION:The subject refractory is consists of the compound composition of zirconium base fire proofing material contg. by weight 1-20% fluoride, and, 5-40% graphite, has excellent alumina sticking preventing effect so that it can be stably used over the long period of time even if used for the kind of steel with which the nozzle blocking is easily generated by sticking of the alumina. As the zirconium based fire proofing material, the zirconia single, the zirconia partially substituted with the zircon, and the zirconia contg. one kind or more among <=10wt.% zircon, silicon carbide, and silicon nitride may be applied. |
