Low Porosity Fireclay Brick:
Low-porosity clay bricks are typical clay refractory products. Low-porosity clay bricks have better high-temperature volume stability, lower creep rate and better wear resistance. The raw materials of low-porosity clay bricks include sapphire aggregate, light and soft clay binder, and auxiliary materials (kyanite , Sillimanite, andalusite) and additives, etc., after reasonable classification, the raw materials are fully mixed, then formed under high pressure, and sintered at 1400 ℃ high temperature conditions. The raw materials for the production of low-porosity clay bricks should require a compact structure, high purity, and few impurities.
Scope of application:
l Low-porosity clay bricks are widely used in large-scale blast furnace supporting hot blast stoves
l Mainly used in the middle and lower lattices and support arches of the regenerators of hot blast stoves.
l In addition, various high-temperature industrial kilns such as lime kiln high-temperature zone firing zone
l Glass kiln regenerator, etc.
Advantage:
l High load softening temperature
l Excellent thermal shock resistance
l Good volume stability
l Low porosity
l Good mechanical strength
l Good wear resistance
l Resistance to penetration
l Acid resistance and slag corrosion resistance.
Technical Data:
|
Item |
Three low clay brick |
Lower porosity brick |
Common clay brick |
|||
|
|
|
DDD |
DN-12 |
DN-15 |
N-1 |
N-2a |
|
Al2O3°≥ |
% |
46 |
45 |
42 |
- |
- |
|
Fe2O3≤ |
% |
1.1 |
1.2 |
1.5 |
- |
- |
|
Apparent porosity≤ |
% |
10 |
12 |
15 |
22 |
24 |
|
Bulk density≥ |
g/cm3 |
2.40 |
2.37 |
2.30 |
2.15 |
2.10 |
|
Cold crushing strength |
Mpa |
70 |
68 |
60 |
30 |
30 |
|
Reheating linear change |
% |
- |
+0.05 -0.1 |
+0 -0.2 |
+0.1 -0.5 |
+0.1 -0.5 |
|
Refractoriness under load(0.2Mpa) |
°C |
1520 |
1500 |
1470 |
1400 |
1370 |
|
Creep rate(0.2Mpa 1200°C x50hs) ≤ |
% |
0.1 |
- |
- |
- |
- |
