| Item | JM20 | JM23 | JM26 | JM28 | JM30 | JM32 |
| USA Brand | IFB2000 | IFB2300 | IFB2600 | IFB2800 | IFB3000 | IFB3200 |
| Classification Temperature (ºC) | 1000 | 1260 | 1430 | 1540 | 1650 | 1760 |
| Bulk Density (g/cm3) | 0.52 | 0.55-0.60 | 0.78 | 0.88 | 1.03 | 1.25 |
| Cold Crushing Strength (Mpa) | 0.8 | 1.2 | 1.6 | 2.1 | 2.5 | 3.5 |
| Modulus of Rupture (Mpa) | 0.6 | 0.9 | 1.4 | 1.6 | 2.1 | 2.1 |
| Reheating Linear Change (%) CT-30 ºCX 8H | 1065 ºC
0 | 1230ºC
0 | 1400ºC -0.5 | 1510ºC -0.8 | 1620ºC -0.9 | 1730ºC
-0.9 |
| Thermal conductivity(W/m.k) | 400ºC | 0.17 | 0.17 | 0.24 | 0.30 | 0.40 | 0.49 |
| 600ºC | 0.19 | 0.19 | 0.27 | 0.32 | 0.42 | 0.50 |
| 800ºC | 0.22 | 0.22 | 0.30 | 0.35 | 0.44 | 0.51 |
| 1000ºC | 0.24 | 0.25 | 0.32 | 0.38 | 0.45 | 0.53 |
| Al2O3 (%) | 45 | 37 | 54 | 64 | 72 | 77 |
| Fe2O3 (%) | 0.9 | 1.0 | 0.9 | 0.8 | 0.7 | 0.5 |
| SiO2 (%) | 50 | 50 | 42 | 32 | 26 | 22 |
JM 28 Mullite Insulation Standard Brick refers to a heat-insulating refractory product made of bauxite with an Al2O3 content of not less than 48%.
JM 28 Mullite Insulation Standard Brick are mainly made of bauxite clinker, combined with clay as raw materials, mixed with binders and sawdust.
In order to improve product performance, industrial alumina, corundum, sillimanite, kyanite, and silica are added The powder can be produced with bulk density above 0.4g/cm3. Al2O3 content and bulk density are different, the highest operating temperature is also different, usually 1250-1350 ℃, some up to 1550 ℃
Features:
1 .High degree of fire resistance, high purity products can reach 1650-1800℃.
2. Good thermal shock resistance.
3. Chemical stability.
4. Low density, good thermal insulation effect.
5 .Low thermal conductivity, stable quality.
Compared with dense refractory bricks, JM 28 Mullite Insulation Standard Brick have the following advantages:
(1) With low heat storage and high thermal efficiency, it can speed up the turnover of intermittent operation kilns, improve production efficiency, reduce fuel consumption and save energy.
(2) Low thermal conductivity, which can reduce the thickness of the furnace wall and roof, reduce the quality of the furnace body, and simplify the structure of the furnace.
(3) The furnace temperature can become uniform. Conducive to improving product quality.
(4) The temperature outside the furnace is low, which is convenient for operation, improves labor efficiency, and improves labor conditions for kiln installation and discharge.
Application:
JM 28 Mullite Insulation Standard Brick mainly used for the insulating lining of hot surfaces or backing heat-insulating layers of other
refractory materials. The refractory linings or heat-insulating materials of the industries, such as, ethylene pyrolysis furnaces, ubular furnaces, reforming furnaces of synthetic ammonia, gas generators and high-temperature shullte kilns, etc.
