Light fused corundum brick

The invention relates to a light fused corundum brick, and belongs to the technical field of flame retardant materials. The chemical composition of the light fused corundum brick comprises the following components in percentage by weight: 93-97 percent of Al2O3, 2.0-5.0 percent of Na2O and/or K2O, 0.15-1.5 percent of SiO2, 0.15-1.0 percent of SrO and 0.05-0.20 percent of BeO, wherein the fused corundum brick comprises alpha-Al2O3, beta-Al2O3 and a matrix glass phase, and is dispersed with a porous structure with a porosity of 25-40 percent; the porous structure is formed by introducing oxygen-containing gas during high temperature melting, the oxygen-containing gas is mixed gas of O2 and CO2, and the O2 content in the mixed gas is 20-80 percent by volume. The light fused corundum brick hasa proper compression strength, light weight, good insulating performance and excellent thermal shock resistance. 本发明涉及种轻质电熔刚玉砖，属于耐火材料的技术领域。本发明的轻质电熔刚玉砖，化学组成含有93～97wt％的AlO，2.0～5.0wt％的NaO和/或KO，0.15～1.5wt％的SiO，0.15～1.0wt％的SrO、0.