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Product description of high alumina checker bricks
High alumina checker brick is a kind of heat regenerator widely recognized and accepted by the world iron making industry in recent years. It has excellent thermal performance such as strong heat exchange capacity, large heat storage area, smooth ventilation, small resistance, etc. It is also a heat transfer medium, mainly used for heat storage in the upper and middle parts of the hot blast furnace regenerator. It plays an important role in heating cold air into hot air.
Advantages of high alumina checker bricks
Good volume stability.
Good load creep performance at high temperature.
High volume and density.
Low porosity.
Application of high alumina checker bricks
High alumina checker bricks is mainly used for hot blast stove. When the temperature is below 900 ℃, fire clay bricks shall be used; When the temperature is higher than 900 ℃, the materials of checker bricks should be high aluminum, mullite, Ceylonite, silica, 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 |