Description For Mullite Bricks
Mullite Bricks are an excellent quality high alumina refractory product contains 65~75% alumina content. Mullite brick is made of mullite as the main raw material which is a very rare kind of quality refractory raw materials, and molded through high temperature firing and pressure. Mullite bricks have advantage performance on furnace and kiln application such as high temperature resistance, chemical and mechanical corrosion, good thermal shock resistance and so on. Some Mullite Bricks with lower alumina content also contain a small amount of glass phase and cristobalite, and some that with higher alumina content also contain a small amount of corundum.
Sintered mullite brick is manufactured by adopting high alumina bauxite as the main raw material and adding a small amount of clay or raw bauxite as the binding agent through molding and firing.
Fused mullite bricks are made of high bauxite, industrial alumina and fireclay as the raw materials and adding charcoal or coke fine stuff as the reducing agent through carbothermic electric melting method after molding.
Light weight mullite insulation brick is made of tiny air space similar to honeycomb that the bricks have an excellent insulating property. Mullite insulation brick as a refractory material can resist high temperature and save heat energy efficiently.
Mullite Bricks Properties
1.Excellent chemical erosion resistance 2.Low thermal conductivity and heat capacity 3.High purity and low impurity content 4.Accurate size and can be cut arbitrarily 5.High strength with good thermal shock resistance 6.Low reheating linear change 7.High temperature resistance and can directly contact with fire 8.High dense structure
Advantage of Rongsheng Refractory Manufacturer
- Provide Customized Refractory Products.
- Best After-Sale-Service.
- Qualified with ISO Certificate, LIRR Test, BV and TUV Certificate.
- Professional Engineers and Advanced Production Technology.
- Sale to Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and etc.
| Mullite Bricks | |||||
| Item | MU 60 | MU 65 | MU 70 | MU 75 | |
| Chemical Composition | Al2O3 | ≥60 | ≥65 | ≥70 | ≥75 |
| SiO2 | ≤35 | ≤33 | ≤26 | ≤24 | |
| Fe2O3 | ≤1.0 | ≤1.0 | ≤0.6 | ≤0.4 | |
| Bulk Density g/cm3 | ≥2.55 | ≥2.55 | ≥2.55 | ≥2.55 | |
| Permanent Linear Change On Reheating (%) 1500℃X2h | 0~+0.4 | 0~+0.4 | 0~+0.4 | 0~+0.4 | |
| Apparent Porosity % | ≤17 | ≤17 | ≤17 | ≤18 | |
| Thermal Conductivity (W/MK) 1000℃ | 1.74 | 1.84 | 1.95 | 1.95 | |
| Cold Crushing Strength Mpa | ≥60 | ≥60 | ≥80 | ≥80 | |
| 20－1000℃ Thermal Expansich10-6/℃ | 0.6 | 0.6 | 0.6 | 0.55 | |
| 0.2Mpa Refractoriness Under Load T0.6 ℃ | ≥1580 | ≥1600 | ≥1600 | ≥1650 | |
| Thermal Shock Resistances 100℃ water cycles | ≥18 | ≥18 | ≥18 | ≥18 | |
