| 摘要 |
PURPOSE:To obtain a tridymite-based silica brick contg. a small amt. of residual quartz and having improved creep resistance due to a small amt. of glass by adding specified amts. of a soda lime-silica melt and iron oxide to silica stock. CONSTITUTION:When silica stock based on silica is burnt produce a silica brick, the silica stock as principal stock is blended with 0.05-0.25wt.% powdery soda lime-silica melt having <=0.3mm particle size and a chemical compsn. consisting of, by weight, 70-75% SiO2, 5-13% CaO, 10-40% Na2O, 0.5-2% Al2O3 and 0.5-4% MgO and 0.1-1.0wt.% (expressed in terms of Fe2O3) iron oxide made of FeO.Fe2O3, Fe2O, Fe2O3 or Fe2O-Fe2O3 and having <=0.3mm particle size. |
