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Product introduction of high alumina checker bricks
High alumina checker brick for hot furnace has been widely recognized and accepted by the world iron making industry due to its superior thermal hydraulic characteristics such as strong heat exchange capacity, large heat storage area, smooth ventilation, low strength, etc.
Features of high alumina checker bricks
High alumina checker brick is a kind of heat transfer medium, which is mainly used in the upper part of the regenerative chamber of the hot blast furnace as a heat accumulator. It plays an extremely important role in the process of heating cold air to hot air.
Applications of high alumina checker bricks
The high alumina checker bricks are mainly used in the regenerator of the hot blast furnace. Due to a certain checker brick structure, the grid holes are arranged in order, and the upper and lower checker bricks can let the gas pass through.
Parameters of high alumina checker bricks
| Refractory checker brick | 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 |