Mullite refractory bricks, also known as light mullite bricks, mainly select refractory materials with aluminosilicate as the main mineral phase, which have excellent properties (especially high temperature creep properties) in the production of natural raw materials. The high aluminum products are supreme.
There are two production methods of mullite bricks, sintering method and electrofusion method. Synthetic mullite is made of industrial alumina, aluminum hydroxide and pure clay and pyrophyllite, and also high alumina bauxite and clay, or high alumina bauxite directly synthesized mullite bricks.
The light mullite brick produced by our company has fine material selection and unique production process, which avoids the influence of impurities and structural defects on the performance of the product to the utmost extent. It has excellent high temperature volume stability and thermal shock resistance, special things. The phase combination and pore structure make it have as low a thermal conductivity as possible and as high a strength as possible. At the same time, it is also possible to design and select suitable production methods for kiln furnaces of different working conditions or according to customer requirements.
Mullite bricks are mainly used in top area of hot air furnace, blast furnace body and furnace bottom, glass melting furnace regenerator, ceramic sintering kiln, petroleum cracking system and so on.
Technical Parameter of Millite Bricks:
| Item | Mullite Refractory Bricks for Sale | ||||
| Chemical composition | Al2O3 | ≥60 | ≥65 | ≥70 | ≥75 |
| SiO2 | ≤35 | ≤33 | ≤26 | ≤24 | |
| Fe2O3 | ≤1.0 | ≤1.0 | ≤0.6 | ≤0.4 | |
| Apparent Porosity％ | ≤17 | ≤17 | ≤17 | ≤18 | |
| Bulk Density g/cm3 | ≥2.55 | ≥2.55 | ≥2.55 | ≥2.55 | |
| Cold Crushing Strength Mpa | ≥60 | ≥60 | ≥80 | ≥80 | |
| 0.2Mpa Refractoriness Under Load T0.6 ℃ | ≥1580 | ≥1600 | ≥1600 | ≥1650 | |
| Permanent Linear Change On Reheating （%）1500℃X2h | 0～+0.4 | 0～+0.4 | 0～+0.4 | 0～+0.4 | |
| Thermal Shock Resistances 100℃ water cycles | ≥18 | ≥18 | ≥18 | ≥18 | |
| 20－1000℃ Thermal Expansich10-6/℃ | 0.6 | 0.6 | 0.6 | 0.55 | |
| Thermal Conductivity (W/MK) 1000℃ | 1.74 | 1.84 | 1.95 | 1.95 | |
