| 摘要 |
PURPOSE: To improve the applicability, corrosion resistance, etc., at the time of lining a furnace with a monolithic refractory using the crushed and even- grained spent refractory as a coarse aggregate by previously coating the surface of the coarse aggregate with a high molecular compd., pitch, etc. CONSTITUTION: The coarse aggregate having 10-30mm size and selected from among alumina-silica, alumina-silicon carbide-carbon and alumina-magnesia materials is prepared. The surface of the aggregate is previously coated with PE resin, one kind among high molecular compds. such as silicone rubber and titanium alkoxide and pitch. The surface-coated coarse aggregate, thin aggregate (e.g. alumina) having <=5mm size and binder (e.g. portland cement) are mixed. The obtained monolithic refractory is kneaded with water and used to line a furnace. Consequently, even if the crushed and even-grained material of the spent refractory which has been used once, fined, solidified and made porous is uses as the raw material for a coarse aggregate, the durability is not lowered. |
