Jun 30, 2021
Mullite Insulation Bricks
The Classification of Mullite Insulation Bricks:
Mullite insulating brick can be divided into the heavy insulating bricks and light mullite bricks on the basis of different density, according to the different temperature, it can be divided into: 1350 mullite bricks, 1450 mullite bricks, 1550 mullite brick etc.
Performance and application of mullite insulation brick:
The refractoriness is high, can reach to more than 1790 degrees centigrade. The RUL is 1600~1700 degrees C. The compressive strength at normal temperature is 70 ~ 260MPa. The thermal shock resistance is good. There are two kinds of mullite bricks: sinterted mullite and fused mullite brick.
The Characteristics of Mullite Insulation Brick:
The main material of sintered mullite brick is high alumina bauxite as the main raw material, adding a small amount of clay or raw bauxite as binder, it is made by molding and sintering. Fused mullite brick with high bauxite, commercial alumina and refractory clay as raw material, adding charcoal or coke fines as a reducing agent, after molding, can adopt the reduction electrofusion method to manufacture. The crystallization of the electric cast mullite is larger than that of the sintered mullite, and the thermal shock resistance is better than that of the sintered product. Their high temperature performance mainly depends on the content of alumina oxide and the uniformity of the distribution of mullite and glass.
Application of Mullite Insualtion Bricks:
Mainly used for hot blast stove of blast furnace and furnace bottom and furnace, glass furnace regenerator, sintering kiln, petroleum cracking dead lining system.
The Manufacture of Mullite Insulation Bricks:
Zhengzhou Rongsheng Kiln Refractory Material Co., Ltd is specialized in producing and selling refractory material for many years, we have technical team with colorful experience and excellent production team, we provide technical supporting and kiln construction service, if you have demand for mullite insulation bricks, welcome to contact with we RS company.
Mullite Insulation Brick Specification:
| Mullite Insulation Brick | ||||||
| Item/Index | JM23 | JM26 | JM28 | JM30 | RS32 | |
| Al2O3 % | 37 | 54 | 64 | 72 | 77 | |
| Fe2O3 % | 1.0 | 0.9 | 0.8 | 0.7 | 0.5 | |
|
Thermal Conductivity (w/m*k) |
400℃ | 0.14 | 0.27 | 0.32 | 0.41 | 0.49 |
| 600℃ | 0.16 | 0.29 | 0.34 | 0.43 | 0.5 | |
| 800℃ | 0.18 | 0.31 | 0.36 | 0.44 | 0.51 | |
| 1000℃ | 0.20 | 0.33 | 0.38 | 0.45 | 0.53 | |
| Classification Temperature (℃) | 1260 | 1430 | 1540 | 1650 | 1760 | |
| Thermal Expansion 1000℃ (%) | 0.5 | 0.7 | 0.8 | 0.9 | 1.1 | |
| Bulk Density (g/cm3) | 0.55-0.62 | 0.78-0.8 | 0.88 | 1.03 | 1.25 | |
| Cold Crushing Strength (Mpa) | 1.2 | 1.6 | 2.1 | 2.5 | 3.5 | |
| Modulus of Rupture (Mpa) | 0.9 | 1.4 | 1.6 | 2.1 | 2.1 | |
| Reheating Linear Change (%)
CT-30℃*8H |
1230℃
-0.5 |
1400℃
-0.5 |
1510℃
-0.5 |
1620℃
-0.9 |
1730℃
-0.9 |
|