Silica mullite brick is a kind of refractory brick mainly composed of mullite, andalusite, silicon carbide and special grade homogenization alumina by high pressure shaping and high temperature firing.

 

Features:

Silica mullite brick is of good high temperature resistance, wear resistance, corrosion resistance, low thermal conductivity, low energy consumption, etc. Currently, it covers the cooling zone and transitional zone of most cement kilns. Silicon mullite brick is of not only good thermal vibration performance, but also suitable thermal conductivity for cement kiln operation.

 

According to client's feedback, the temperature requirement outside cement kiln isn’t more than 320℃, but the tested temperature of silica mullite brick is only 250~280℃ after using, which reduces the surface temperature of kiln shell significantly and energy consumption. Silica mullite brick is also of very good thermal resistance, its refractoriness under load can reach 1600℃, but for carrier in cement kiln is normally about 1400℃, there won’t be any problem after reusing for one year. It's also of good wear resistance which fully meets the international standard of refractory material.

 

Application:

Silica mullite brick is widely used in decomposition zone and preheating zone of dry cement kiln, high wear parts of grate cooler and other parts scoured by rapid wind. It's of strong allocation adaptation. For traditional refractory allocation, spinel brick, magnesia-chromite brick, anti-stripping brick and other refractories of different performances are normally allocated in kilneye, former transitional zone, latter transitional zone and decomposition zone separately while silicon-mullite brick can cover all the craft zones except firing zone.

 

Physical & Chemical Index:

Item

AZM-1680

AZM-1650

AZM-1550

AZM-1450

Al2O3%

65

65

63

58

Refractoriness  ≥℃

1790

1790

1790

1790

0.2MPa Refractoriness

under load ≥℃

1650

1600

1550

1450

Cold compressive strength ≥ MPa

110

100

80

70

Bulk & Density ≥g/cm3

2.7

2.65

2.55

2.5

Thermal vibration stability (1100℃-cold water)≥

20

12

12

10

Apparent porosity %

0.2

0.2

0.22

0.25

Notes

For >2000t/d former transitional section

For 2000t/d outlet cooling section

For >2000t/d latter transitional section

 

Notes: Silica mullite brick can be used at the bend and other special parts of tertiary air duct according to your requirement to efficiently resist the intense scouring of large amount of dust in tertiary air duct and erosion of chlor-alkali smoke-gas with the life span of more than three years.