Mainly used in hot blast furnace tops, blast furnace shafts and bottoms, glass melting furnace regenerators, ceramic sintering kilns, dead-end furnace linings in petroleum cracking systems, etc.
The main component of mullite brick is mullite, which is formed by the reaction of aluminum (Al2O3) and silicon dioxide (SiO2) at high temperatures. Mullite is a high-quality refractory material, which is very rare. Mullite is a mineral formed by the crystallization of aluminosilicate at high temperatures. It has high crystallinity, excellent heat insulation effect, low heat conduction activity, and remarkable energy-saving effect. Mullite bricks are divided into sintered mullite bricks and cast mullite bricks.
| Item/Grau | JM-70 | JM-62 | |
|---|---|---|---|
| ω (Al2O3)/% | μ0 ≥ | 70.0 | 62.0 |
| ở | 3.0 | ||
| ω (Fe2O3)/% | μ0 ≤ | 1.8 | 1.5 |
| ở | 0.2 | ||
| Refractoriness/℃ | μ0 ≥ | 1780 | 1760 |
| ở | 10 | ||
| Porosidade aparente/% | μ0 ≤ | 28 | 26 |
| ở | 2 | ||
| Resistência ao esmagamento a frio/MPa | μ0 ≥ | 25 | |
| ở | 7 | ||
| Permanent Linear Change (1500℃*2h)/% | Xmin~Xmáximo | -0.1~+0.4 | |
High Refractoriness High Thermal Conductivity Good Creep Resistance Strong Ability to Resist Acid and Alkali Slag