| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject refractory material improved in adherability, adhesivity and corrosion resistance by incorporating a refractory aggregate comprising alumina having a specific particle size or lower and magnesia with sepiolite, a binder and hardening promoter. SOLUTION: This refractory material for wet gunning application is obtained by incorporating 100 pts.wt. of a refractory aggregate comprising 5-30 wt.% of alumina <=1 mm in particle size, <=8 wt.% of calcined magnesia and the rest of magnesia mainly other than the calcined magnesia with 0.1-2 pts.wt. of sepiolite as a kind of mineral fiber, a binder (0.1-4 pts.wt. of a hydrous silicate and/or 0.1-4 wt.% of a condensed phosphate) and 0.5-7 pts.wt. of a hardening promoter. For wet-type gunning application using this refractory material, this material as a compounded composition is incorporated with 10-25 wt.% of water followed by kneading and then gunning the kneaded product on an object. Because the gunning material thus prepared has a combination of high adherability, bond strength and corrosion resistance to applied sites, improvement in the durability of such applied sites is highly remarkable, therefore significantly contributing to reducing the amount of such a gunning material to be used, improving the operation rate of the equipment as an object applied, etc. |
