Description
Mullite Brick is a kind of High-aluminum refractories that regard the mullite (Al2O3•SiO2) as the main crystal phase. The average alumina content is between 65% and 75%. In addition to mullite mineral composition, which contains lower alumina also contains a small amount of glass and cristobalite; higher alumina containing a small amount of corundum. High refractoriness up to 1790°C. Load softening starting temperature 1600 ~ 1700 °C. Room temperature compressive strength 70 ~ 260MPa. Good thermal shock resistance. The mullite brick adopts the imported plate corundum and high-purity fused corundum as the main raw materials, and adopts advanced ultrafine powder addition technology. After mixing, drying and forming, it is fired in a high-temperature shuttle kiln.
Characters:
►High refractoriness under load
►Good thermal shock resistance
►Good wear resistance
►Good erosion resistance
Specification
Item |
MK60 |
MK65 |
MK70 |
MK75 |
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 |
Application
Mullite bricks are widely used in slag gasification furnaces, synthetic ammonia conversion furnaces, carbon black reactors, and refractory kiln furnaces, Furnace roof of hot blast stove, Furnace stack and bottom of blast furnace,Regenerative chamber of glass melting furnace and Ceramic high temperature furnace.
FAQ
Q: Are you a manufacturer?
A: Yes,we are factory in China. Our factory covering an area of 30,000 square meters, it has a complete set of modern production equipment, two large production bases including hydro-metallurgy, two key laboratories and a metallurgical materials testing center with dozens of senior researchers.
Q: Which kind of payment terms do you accept?
A: For small order,you can pay by T/T, Western Union or Paypal,nomal order by T/T or LC to our company account.
Q: Can you give me a discount price?
A:Surely,It depends on your quantity.
Q: How can i get a sample?
A: Free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.