- 17
- Sep
High aluminum hook brick
High aluminum hook brick
Product advantages: low temperature creep, strong corrosion resistance, good thermal shock stability
product description
High-aluminum hook bricks with alumina content above 48% are neutral refractory materials. It is formed and calcined from bauxite or other raw materials with high alumina content. High-aluminum hook bricks have high thermal stability, and their refractoriness is above 1770℃. The slag resistance is better.
The production process of high alumina bricks and multi-clinker clay bricks are similar. The difference is that the proportion of clinker in the ingredients is higher, which can be as high as 90-95%. The clinker needs to be sorted and sieved to remove iron before crushing, and the firing temperature Higher, such as Ⅰ, Ⅱ high alumina bricks are generally 1500~1600℃ when they are fired in a tunnel kiln.
Physical and chemical indicators
Rank/Index | High alumina brick | Secondary high alumina brick | Three-level high alumina brick | Super high alumina brick |
LZ-75 | LZ-65 | LZ-55 | LZ-80 | |
AL203 ≧ | 75 | 65 | 55 | 80 |
Fe203% < | 2.5 | 2.5 | 2.6 | 2.0 |
Bulk density g/cm2 | 2.5 | 2.4 | 2.2 | 2.7 |
Compressive strength at room temperature MPa> | 70 | 60 | 50 | 80 |
Load softening temperature °C | 1520 | 1480 | 1420 | 1530 |
Refractoriness °C> | 1790 | 1770 | 1770 | 1790 |
Apparent porosity% < | 24 | 24 | 26 | 22 |
Heating permanent line change rate% | -0.3 | -0.4 | -0.4 | -0.2 |