| 摘要 |
Improved refractory compsn. comprises (1) 100 pts. by wt. of hydraulic cement, (2) 3-50 pts. by wt. of re-emulsification type powder resin, (3) 50-600 pts. by wt. of a mixt. comprising 15-85 pref. 20-80 wt.%of aluminium hydroxide powder and 85-15 wt.% (pref. 80-20 wt.%) of a carbonate decomposable at a temp. of 300-1000 deg.C, (4) 20-300 pts. by wt. of light weight aggregate wherein open cells comprise 50% or more of the whole cells. The resin is e.g. vinyl resin-, or ethylene-vinylacetate copolymer-powder and/or vinylacetate-vinylbarcetate copolymer. The aggregate is specified to be expanding-parlite and/or vermicultie. The refractory coating is carried out in the following processes, (1) mixing the above four components while adding water (2) coating onto the surface of the iron refractory material. The process for adhering the sheet-like material to the coated surface before the coating dries is carried out following process (2). In the above method iron refractory- and sheet-like-materials can be interchanged. An evaporating antirusting agent can be added to the refractory compsn. |
