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
lLow-porosity clay bricks are widely used in large-scale blast furnace supporting hot blast stoves
lMainly used in the middle and lower lattices and support arches of the regenerators of hot blast stoves.
lIn addition, various high-temperature industrial kilns such as lime kiln high-temperature zone firing zone
lGlass kiln regenerator, etc.
Advantage
lHigh load softening temperature
lExcellent thermal shock resistance
lGood volume stability
lLow porosity
lGood mechanical strength
lGood wear resistance
lResistance to penetration
lAcid 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 |
- |
- |
- |
- |
