Features:
1. Refractoriness
The refractoriness of it higher than that of clay bricks and semi-silica bricks, reaching 1750~1790 ℃, which belongs to refractory materials.
2. Load softening temperature
Because of the high Al2O3 in high alumina products, less impurities and less fusible glass body, the softening temperature under load is higher than that of clay bricks, but because mullite crystals do not form a network structure, the softening temperature under load is still lower than that of silica bricks.
3. Slag resistance
There are more Al2O3 in high alumina brick, which are close to neutral refractory materials, and can resist the erosion of acidic slag and alkaline slag. ,
Applications:
High alumina brick 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 brick are also widely used as open hearth regenerative checker bricks, plugs for pouring systems, nozzle bricks, etc. However, the price of high-alumina bricks is higher than that of clay bricks, so it is not necessary to use high-alumina bricks where clay bricks can meet the requirements.
