Corundum products are made from hight purityfused white corundum, mullite, chromium oxide, and other raw materials, throughhigh-pressure dynamic forming and ultra-high temperature sintering. Thisproduct has high temperature resistance, high strength, acid and alkalicorrosion resistance, is not affected by reducing gases such as H2 and CO, andhas excellent characteristics such as good insulation at high temperatures andlow dielectric constant.
Used for ironmaking blastfurnaces, steel refining furnaces, and glass melting furnaces; And gasifiers,ethylene gasifiers, and ammonia decomposition furnaces in industries such aspetrochemicals; Carbon black furnaces in the chemical industry and crackingfurnaces in the fertilizer industry; High temperature kilns for refractorymaterials and ceramic industries.
index name | DL-98 | DL-95 | DL-90 |
Al2O3%≥ | 98.5 | 95 | 90 |
Cr2O3%≥ | —— | —— | —— |
SiO2%≤ | 0.3 | 3.0 | 9.0 |
Fe2O3%≤ | 0.2 | 0.3 | 0.5 |
R2O%≤ | 0.3 | 0.6 | 0.6 |
体积密度 Bulk Density g/cm3≥ | 3.0-3.2 | 2.9 | 2.9 |
常温耐压强度 Clod crushing strength MPa≥ | 75 | 100 | 100 |
耐火度 Refractoriness℃≥ | 1790 | 1790 | 1790 |
荷重软化点 Refractoriness under load ℃0.2MPa≥ | 1700 | 1700 | 1700 |
重烧线变化 Permanent linear change %1600×3h≤ | 0.2 | 0.2 | 0.2 |
热稳定性 Thermal stability 次1100℃水冷≥ | 6 | 10 | 10 |