该砖采用烧结特种高铝矾土，合理配比添加氧化锆、硅锰矿和安达卢西亚石，经高压压制和高温烧结而成，具有优良的抗剥落性，碱、钠、硫、氯和碱盐腐蚀性。 导热系数低,是水泥窑过渡和煅烧区较好的理想选择.
| Item | KYHA-70 | KYHA-75 |
| Al2O3 % ≥ | 70 | 75 |
| ZrO2 % | 6-8 | — |
| Refractoriness ℃ ≥ | 1790 | 1790 |
| Bulk density g/cm3 ≥ | 2.5 | 2.60 |
| Apparent porosity % ≤ | 24 | 23 |
| Cold crushing strength Mpa ≥ | 60 | 70 |
| 0.2Mpa R.U.L ℃T0.6 ≥ | 1470 | 1520 |
| Thermal shock resistance 1100℃ water cycle ≥ | 30 | 25 |
High alumina refractory brick is formed and calcined from bauxite or other raw materials with high alumina content. High thermal stability, refractoriness above 1770℃. It has good slag resistance and is used for the lining of steel-making electric furnaces, glass melting furnaces, cement rotary furnaces, etc.
Features:
High alumina brick has the advantages of small high temperature creep, strong corrosion resistance, good thermal shock stability, etc. It is suitable for large and medium-sized hot blast stoves.
Application:
High alumina bricks are mainly used for masonry blast furnace, hot blast stove, electric furnace roof, blast furnace, rotary kiln lining. In addition, high alumina bricks are also widely used as open hearth regenerative checker bricks, plugs for pouring systems, nozzle bricks, etc.