Mullite insulation brick is made of high-alumina bauxite clinker as the main material, plus a small amount of clay or raw bauxite as a binder, and then shaped and sintered at high temperatures.
![mullite insulation brick](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/mullite-insulation-brick-1.jpg)
Mullite refractory bricks are also called lightweight mullite brick and mullite thermal insulation brick, Mullite insulation brick is a high-alumina refractory material with mullite (3Al2O3·2SiO2) as the main crystal phase. Generally, the alumina content is between 40% și 75%. Those with lower aluminum content also contain a small amount of glass phase and cristobalite, and those with higher alumina content also contain a small amount of corundum.
Mullite insulation brick parameters
![JM23 JM26 JM28 JM30 bricks](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/JM23-JM26-JM28-JM30-bricks.jpg)
Physical and chemical indicators:
Articol | Index | ||||
JM23 | JM25 | JM26 | JM27 | ||
Al2O3 % | ≥40 | ≥50 | ≥55 | ≥60 | |
Fe2O3 % | ≤1,0 | ≤1,0 | ≤0.9 | ≤0,8 | |
Porozitate aparentă % | ≤0,55 | ≤0.80 | ≤0.85 | ≤0.9 | |
Cold Crush Strength MPa | ≥1,0 | ≥1.5 | ≥2.0 | ≥2,5 | |
Rata de schimbare liniară permanentă % | 1230℃×12 ore | 1350℃×12 ore | 1400℃×12 ore | 1450℃×12 ore | |
-1.5~0.5 | |||||
Thermal Conductivity W/(m·K) | 200±25℃ | ≤0.18 | ≤0.26 | ≤0.28 | ≤0.32 |
350±25℃ | ≤0.20 | ≤0.28 | ≤0.30 | ≤0.32 | |
600±25℃ | ≤0.22 | ≤0.30 | ≤0.33 | ≤0.36 | |
0.05MPa Refractoriness Under LoadT0.5 ℃ | ≥1080 | ≥1200 | ≥1250 | ≥1300 |
Articol | Index | |||
JM28 | JM30 | JM32 | ||
Al2O3 % | ≥65 | ≥70 | ≥77 | |
Fe2O3 % | ≤0,7 | ≤0,6 | ≤0,5 | |
Porozitate aparentă % | ≤0.95 | ≤1.05 | ≤1.35 | |
Cold Crush Strength MPa | ≥2,5 | ≥3.0 | ≥3,5 | |
Rata de schimbare liniară permanentă % | 1510℃×12 ore | 1620℃×12 ore | 1730℃×12 ore | |
-1.5~0.5 | ||||
Conductivitate termică cu(m·K) | 200±25℃ | ≤0,35 | ≤0.42 | ≤0.56 |
350±25℃ | ≤0.37 | ≤0.44 | ≤0.60 | |
600±25℃ | ≤0.39 | ≤0.46 | ≤0.64 | |
0.05MPa Refractoriness Under Load T0.5 ℃ | ≥1360 | ≥1470 | ≥1570 |
Mullite insulation brick advantages
![jm brick](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/jm26-brick.jpg)
- Low heat fusion
- Conductivitate termică scăzută
- High refractoriness
- Good chemical stability
- High compressive and flexural strength
- Accurate appearance and size
Mullite insulating brick application
![mullite insulation brick](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/mullite-insulation-brick.webp)
Mullite insulating bricks are suitable for lining cracking furnaces, furnalele calde, ceramic roller kilns, electric porcelain drawer kilns, glass crucibles, and various electric furnaces. It is used for the roof of the hot blast stove, furnace body and bottom of blast furnaces, regenerator of glass melting furnaces, ceramic sintering kiln, furnace lining of petroleum cracking system, etc. Mullite insulation bricks also have the characteristics of high load softening temperature, compact structure, porozitate scăzută, and good erosion resistance.
Mullite insulation brick refractories company
![refractories company](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/refractories-company.webp)
Insulating fire bricks success case
The refractory bricks of Rongsheng Refractories Co., Ltd. have been sold to more than 80 ţări, including Russia, Uzbekistan, Ecuador, Chile, Africa de Sud, Portugal, and other places. Customers are very satisfied with this mullite JM brick.
![Insulating fire bricks](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/Insulating-fire-bricks.jpg)
FAQ of mullite refractory bricks
![mullite bricks manufacturers](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/mullite-bricks-manufacturers.jpg)
The operating temperature range of mullite insulation bricks is generally 1000°C-1650°C, and can be customized according to specific use requirements.
da, Support customization.
Store in a dry and ventilated warehouse to avoid moisture. During transportation, care should be taken to avoid severe vibration and collision to avoid damage.
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