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Product introduction of high alumina checker bricks
High alumina seven-hole checker brick for hot blast furnace is a kind of heat-carrying accumulator with many superior thermal characteristics such as strong heat exchange capacity, large heat storage area, smooth ventilation and low resistance, which is widely recognized and accepted by the world iron-making industry. According to your needs, Kerui can customize the production of lattice bricks with different material ratios and brick types.
Features of high alumina checker bricks
Good volumetric stability
Excellent high temperature load creep performance
High density and low porosity
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 |
Refractory bricks of air heater
When the design temperature of the hot blast furnace roof is not less than 1400°C, under the premise of good combustion of blast furnace fuel and high operation level, the preferred refractory material for the high temperature area of the hot blast furnace should be silica bricks, while the residual quartz of the silica bricks must be controlled at no more than 2%. The hot blast furnace using silicon bricks need to pay attention to must carefully determine the lower limit of its silicon brick use, and set up a reliable temperature detection device here to ensure that the minimum use of silicon bricks in the process of production operation (including rest wind stop furnace) is not less than 800 ° C.