| 摘要 |
PROBLEM TO BE SOLVED: To provide a monolithic refractory for spraying having properties such as fire resisting characteristic sufficiently durable against repeating use, heat insulating property, extremely low reactivity with materials in a furnace, proper strength, volume stability and spalling resistance due to the heat history and provided with excellent working environmental property and high sticking property. SOLUTION: One or more kinds of refractory raw materials selected from the refractories such as alumina, mullite, chamotte, silica stone, silicon carbide, microsilica, clay are used and these raw materials are composed of 50-70wt.% coarse particle raw material having 0.5-3.5mm particle diameter, 1-7wt.% fine particle raw material having 0.125-0.5mm particle diameter and a fine powder raw material, 95% of which passes through the mesh of 0.125mm, and one or more kinds of additives such as a water holding material, a sizing agent, a water reducing agent or the like and a hardening agent such as alumina cement are blended by 25-45% in total quantity with the fine powder raw material per the refractory raw material having the above particle size constitution. |
