How much can mullite lightweight insulation bricks withstand?

Mullite insulation brick is a new type of refractory material, which can directly contact the flame. It has the characteristics of high temperature resistance, high lightness, low thermal conductivity, and significant energy saving effect. Mullite lightweight insulation bricks have the characteristics of good high-temperature performance and low cost. They can be used for kiln linings, which can not only effectively reduce the quality of the furnace body, save ignition, but also extend the service life of the furnace lining and reduce maintenance costs.

Mullite lightweight insulation bricks are mainly made of bauxite, clay, “three stones”, etc., through the formation of a large number of interconnected or closed pores in the material molding or high-temperature sintering process.

Features of mullite lightweight insulation bricks:

How much can mullite lightweight insulation bricks withstand? The high temperature resistance of mullite light insulation brick can reach above 1790℃. The load softening start temperature is 1600-1700℃, the normal temperature compressive strength is 70-260MPa, the thermal shock resistance is good, the strength is high, the high temperature creep rate is low, the expansion coefficient is low, the thermal coefficient is small, and the acid slag is resistant. And it can greatly reduce the weight of the high-temperature furnace body, transform the structure, save materials, save energy, and improve production efficiency.

Application range of mullite lightweight insulation bricks:

Mullite lightweight insulation bricks are mainly used for high-temperature furnaces above 1400℃, high-temperature furnace roofs, forehearths, regenerator arches, superstructures of glass melting furnaces, ceramic sintering kilns, ceramic roller kilns, tunnel kilns, The inner lining of electric porcelain drawer kiln, dead corner furnace lining of petroleum cracking system, glass crucible kiln and various electric furnaces can directly contact the flame.

The physical and chemical indexes of mullite light insulation brick:

Index/Product Specification	ρ=0.8	ρ=1.0	ρ=1.2
Classification temperature（℃）	1400	1550	1600
Al2O3（%）≥	50 ~ 70	65 ~ 70	79
Fe2O3（%）≤	0.5	0.5	0.5
Обемна плътност (g / cm3)	0.8	1.0	1.2
Compressive strength at room temperature (Mp)	3	5	7
Thermal conductivity (350℃) W/(mk)	0.25	0.33	0.42
Load softening temperature (℃) (0.2 Mp, 0.6%)	1400	1500	1600
Reheating linear change rate% (1400℃×3h)	≤ 0.9	≤ 0.7	≤ 0.5
Long-term use temperature (℃)	1200 ~ 1500	1200 ~ 1550	1500-1700