| 摘要 |
PURPOSE:To obtain a protective wall and a water tube protective material with each of casting work, which stably transfer heat from the gas in a furnace to boiler water at a high heat transfer coefficient, by a method wherein the protective wall and material contain a particular amount of phosphate solution and silicon carbides, and liquid component and powder component and kneaded together when they are applied. CONSTITUTION:A water tube protective material contains about 5-20wt.% of phosphate solution and about 10-80wt.% of silicon carbides, and the remains are composed of materials such as chamotte, electro-molten or sintered mullite, electro-molten or sintered alumina, kyanite, selven, spinel, zircon, etc., to form a minute structure. The powder component consists of heat resistance aggregates and fine powder composed of adequate materials having a less reactivity against phosphate solution, and the liquid component and powder component are kneaded together when they are applied. By containing 10wt.% or more of silicon carbides, the protection materials is excellent in heat transfer, and highly efficient heat recovery can be achieved. Moreover, it effectively works against corrosive gases in addition to its alkali- proof property due to silicon carbides, and has a good durability as well. As the powder component and the liquid component are separated from each other, they are fairly preservable and the workability is improved as they are kneaded together when they are applied. |
