Checker brick is a kind of refractory brick that can withstand 1740-1780℃. It can be used in hot blast stoves, glass kilns, and regenerators of coke ovens. Compared with other refractory bricks, it has a strong heat exchange capacity, large heat storage area, reduced energy consumption, volume stability, and other features.
| Item/Grade | RL-65 | RL-55 | RL-48 |
|---|---|---|---|
| ω (Al2O3)/% | 65 | 55 | 48 |
| Refractoriness/ ≥ ℃ | 1780 | 1760 | 1740 |
| Apparent Porosity/% | 23 | 22 | 22 |
| Cold Crushing Strength/MPa | 50 | 45 | 40 |
| 0.2MPa Refractoriness Under Load/℃ | 1500 | 1470 | 1420 |
| Permanent Linear Change/% | 1500℃*2h | 1500℃*2h | 1500℃*2h |
| 0.1~-0.4 | 0.1~-0.4 | 0.1~-0.4 |
1.Strong Heat Exchange Capacity 2.Large Heat Storage Area 3.Good Creep Resistance
Chequer bricks are usually used in hot blast stoves, glass kilns, regenerators of coke ovens, electric arc furnaces, induction furnaces, AOD furnaces, VOD furnaces, thermal technology equipment, etc.
It is worth to noting that it usually uses clay checker brisks in hot blast stoves, when the hot air is less than 900℃. When the hot air is more than 900℃, it usually uses high-alumina checker brick, mullite checker brick, silica checker brick, and sillimanite refractory bricks.