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High alumina bricks: among the refractory materials produced with aluminum-silicon raw materials,Al203The main components of the bricks are high alumina bricks, mullite bricks and corundum bricks.
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Product Description
High alumina refractory bricks are formed and calcined from bauxite or other raw materials with high alumina content.Generally, high-alumina bricks are made of high-quality bauxite clinker, combined with clay and additives.The refractoriness is above 1650℃.There are also technological processes such as crushing → mixing → forming → drying → firing → inspection → packaging.
characteristic:
The product has high refractoriness, good acid and alkali corrosion resistance, high high temperature strength, good thermal shock stability, excellent high temperature mechanical properties and chemical corrosion resistance, good creep performance, and excellent thermal shock resistance.
High alumina bricks are mainly used for the lining of blast furnaces, hot blast stoves, electric furnace roofs, blast furnaces, reverberatory furnaces, and rotary kilns.In addition, high alumina bricks are also widely used as open hearth regenerative checker bricks, plugs for pouring systems, nozzle bricks, etc.
project | LZ-80 | LZ-75 | LZ-65 | LZ-55 |
Al2O3% ≥ | 80 | 75 | 65 | 55 |
Refractoriness ℃ ≥ | 1790 | 1790 | 1790 | 1770 |
0.2MPa re-softening start temperature ℃ ≥ | 1530 | 1520 | 1500 | 1470 |
Apparent porosity% ≤ | 22 | 23 | 23 | 22 |
Compressive strength at room temperature MPa ≥ | 70 | 60 | 49 | 44 |
Reheating line change% 1500℃x2h | 0.1 ~ -0.4 | |||
0.1 ~ -0.3 | ||||
