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Product description of high alumina checker bricks
High alumina checker brick for hot blast furnace is a heat accumulator with strong heat exchange capacity, large heat storage area, smooth ventilation and low strength, widely recognized and accepted in the world of iron production. High alumina checker brick is a heat transfer medium, mainly used in the upper part of the heat storage chamber of the hot blast furnace, which plays a heat storage role. It plays an extremely important role in the process of heating cold air in hot air.
Advantages of high alumina checker bricks
Good volumetric stability
High density and low porosity
Excellent sliding properties at high temperature
Application of high alumina checker bricks
High alumina checker bricks are mainly used in the heat storage chamber of the hot blast furnace and are arranged neatly by high alumina checker bricks with lattice holes of a certain structure; The upper and lower holes of the checker bricks can be allowed to pass through the gas. According to the technical requirements of different temperature areas, the general choice is that of silica lattice bricks, clay bricks, etc.
Parameters of high alumina checker bricks
| Item | RL-65 | RL-55 | RL-48 |
| Al2O3, %, ≥ | 65 | 55 | 48 |
| Refractoriness, ℃ , ≥ | 1780 | 1760 | 1740 |
| Refractoriness Under Load of 0.2MPa, ℃ , ≥ | 1500 | 1470 | 1420 |
| Linear Change after Reheating, %, 1500℃x2h | 0.1~-0.4 | 0.1~-0.4 | 0.1~-0.4 |
| Apparent Porosity, %, ≤ | 23 | 22 | 22 |
| Cold Crushing Strength, MPa, ≥ | 50 | 45 | 40 |