| 摘要 |
A thermally activated, dry refractory composition and method for the high temperature, dry application of a new refractory lining or the repair of an existing refractory lining on an interior surface of a furnace and the like is disclosed. The composition includes a refractory aggregate and a hydrated material containing chemically bound water of hydration, such as a metasilicate hydrate, which give the composition a self-flowable property, and may include other binders, homogenizers and flowability enhancing agents, such as calcium carbonate and phosphate glass. The refractory composition is placed in a dry state into a hot furnace at a temperature of at least about 500 DEG C, in communication with the surface to be coated. The water of hydration is released at the high temperature causing the composition to become a self-flowable aqueous slurry which coats-out on the surface. Continued exposure to the high temperature causes vaporization of the water with consequent drying and setting of the composition leaving a refractory lining in place on the surface. |
