Raw materials and processes: blast furnace with mullite brick artificial melting or sintered mullite raw materials as the main raw material, the high-pressure molding, high temperature sintering, the main mineral composition is mullite.
Features: The product has a low porosity, load softening point, high creep resistance and good resistance to chemical erosion and other characteristics.
Applications:It is a large blast furnace with high-level “ceramic cup” one of the materials, but also hot stoves and other industrial furnace with high-grade refractory materials.
Item
Mullite brick
Sillimanite brick
Composite brown corundum brick
Al2O3% ≥
70
55
75
Fe203% ≤
0.8
1.5
SiC, 10
Degree of fire resistance℃ ≥
1800
1800
1800
Refractoriness under 0.2MPa load℃≥
1650
1550
1700
Linear change on reheating %1500 ℃x2h
0~0.4
0~0.4
±0.2
Apparent porosity % ≤
18
17
18
Cold compressive strength MPa ≥
100
80
80
Stability of thermal shock resistance 1100 ℃water cooling