高铝砖
High alumina bricks                                                                  【GB2988-87】

性能 properties 牌号 Brands 一级高铝 二级高铝 三级高铝 LZ-75 LZ-65 LZ-55 LZ-48 Al2O3,≥ % 75 65 55 48 耐火度 Refractoriness,≥,℃ 1790 1770 1750 0.2Mpa 荷重软化开始温度 RUL, T0.6,℃≥,℃ 1520 1500 1470 1420 重烧线变化 Linear change on reheating,% 1500℃×2h +0.1 -0.4 -0.4 1450℃×2h — — +0.1 -0.4 显气孔率 Apparent porosity,≤ % 23 22 常温耐压强度 CCS,≥Mpa ≥53.9 ≥49.0 ≥44 ≥40

冶金行业电炉、各种高炉用炉顶砖（拱脚砖）
Roof&skew bricks used in metallurgical industry, electric furnace and blast furnace  【YB/T5107-93】

高铝不烧电炉顶砖
Pressurwe at normal temperature

理化性能 Physical & chemical properties 高铝不烧电炉顶砖 Pressure at normal temperature 化学成份 % Chemiacl composition Al2O3 ≥80 Fe2O3 ≤1.7 显气孔率 % Apparent porsity,% ≤15 体积密度 BD,g/cm3 ≥3.0 常温耐压强度, CCS Mpa 一般电炉顶砖 For general electric furnace ≥80 超高功率电炉顶砖 For super power electric furnace ≥100 耐火度 Fire-resistance, ℃ ≥1790 0.2Mpa 荷重软化开始温度RUL,℃ ≥1600 重烧线变化 % Linear change on reheating（1550 ℃×3h） -0.4 热震稳定性次数（1100℃水冷），次 Thermal shock resistance (1100℃ water quench),cycles ≥15

钢包工作层用浇注料
The castables of the ladle working lining
　　刚玉尖晶石整体浇注料是以刚玉为主要原料，添加部份尖晶石或镁砂原料，以水泥或微粉为结合剂的不定型产品，使用中具有良好的整体性、抗侵蚀性及热震稳定性优的特点。
　　The corundum-spinel based castables is one integral casting refractory material of the ladle, using corundum as main material and incorporating certain spinel or magnesia materials, bound by the cement or micro-powder. This unshaped refractory has good integrity,excellent corrosion resistance and thermal shock stability.