What should notice when choosing high alumina firebrick? What is the ability about the high alumina refractory brick, if can reach the target of long term using for lining masonry and what’s the features of high alumina brick? What is necessary for us to know well before purchasing high alumina brick?
High Alumina Bricks Physical and Chemical Index
| Item | First-grade high alumina brick | Second-Grade High Alumina Brick | Third-Grade High Alumina Bricks | Special-Grade High Alumina Brick |
| LZ-75 | LZ-65 | LZ-55 | LZ-80 | |
| Al2O3，% ≥ | 75 | 65 | 55 | 80 |
| Fe2O3，% ＜ | 2.5 | 2.3 | 2.6 | 2 |
| Volume Density，g/cm3 ≥ | 2.6 | 2.5 | 2.35 | 2.7 |
| Apparent Porosity，% ≤ | 22 | 23 | 24 | 21 |
| Cold Crushing Strength，Mpa ≥ | 70 | 60 | 50 | 80 |
| 0.2MpaRefractoriness under load，℃ | 1510 | 1460 | 1420 | 1550 |
| reheating linear change rate ，% | -0.3 | -0.4 | -0.4 | -0.2 |
Properties of High Alumina Bricks
- High refractory under load
- Good thermal shock stability
- Strong acid-resistance, alkali-resistance, slag-resistance
Use of High alumina Bricks
High alumina refractory bricks are used for hot blast masonry, hot blast furnace, steel ladles, rotary kilns linings and metallurgical furnace, high alumina fire brick also can be used as checker brick in hot blast furnace to construct regenerative chamber.
Matters needing attention when purchasing high alumina refractory brick
- choose regular high alumina refractory manufacturer
- the refractory brick you choose need achieve the desired using effect.
- Know the using environment of high alumina refractory brick
- According to the using situation of your kiln.
Where to buy Good High Alumina bricks?
Want to buy high quality high alumina brick with cheap price, suitable manufacturer is the key factor, I recommend that Zhengzhou RS refractory company, which has many years experience in refractory materials and get good feedback from our customers.
