| 摘要 |
PURPOSE:To obtain refractory bricks for heat storage by using a material of SiO2-Al2O3 of a prescribed Al2O3 content or of SiO2-Al2O3-SiC of a prescribed SiC content and setting specific surface area, specific surface area ratio and apparent porosity to a specific value, respectively. CONSTITUTION:An SiO2-Al2O3 material of 35 to 75wt.% Al2O3 content or an SiO2-Al2O3-SiC material of 15 to 75wt.% SiC content is subjected to compression molding at about 250 to 550kgf/cm<2> to give a refractory brick of less than 21% apparent porosity, 80 to 95m<2> specific surface area represented by the area of heat-transfer surface/m<3> brick bulk volume and 0.050 to 0.075m<2> specific surface area ratio represented by the area of heat-transfer area/kg brick weight. In the rectangular brick 10, a plurality of slit parts C of 9 to 11mm width and the lamella parts of 8 to 11mm thickness 6 are respectively arranged on both sides of columnar parts (a) intersecting with the lamella parts 6 at the right angle and 3 or more legs (a') are set on the projections at the bottoms of the columnar parts (a). |
