Clay Insulation Bricks

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Clay insulating brick is a lightweight, shaped refractory material primarily manufactured from high-quality clay raw materials through high-temperature sintering, utilizing either the combustible-additive method or the foaming process. Characterized by low bulk density, low thermal conductivity, excellent thermal shock resistance, and ease of cutting and processing, it effectively blocks heat transfer and significantly reduces the structural load on furnace steelwork. Consequently, it serves as a highly cost-effective and energy-efficient thermal insulation material for medium-to-low temperature zones within glass melting furnaces—specifically in areas that do not come into direct contact with molten glass—such as furnace wall backings, hearth insulation, regenerator outer walls, and flue systems.
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Clay insulation bricks are made primarily from high-quality clay, mixed with combustible additives or produced using a foaming process, and then sintered at high temperatures. These products feature low bulk density, low thermal conductivity, and significant thermal insulation and energy-saving benefits, making them an ideal energy-saving material for furnace insulation, back-lining, and flue systems in glass melting furnaces.


Key Features:


Outstanding Thermal Insulation: The low bulk density and uniformly distributed pore structure give the product an extremely low thermal conductivity, effectively blocking heat transfer and significantly reducing heat loss from the furnace surface.


Excellent Thermal Shock Resistance: The porous structure provides the bricks with outstanding resistance to thermal shock. They do not crack or spall under frequent temperature fluctuations, making them suitable for areas prone to temperature variations, such as regenerators and flue systems.


Lightweight and Weight-Reducing: With a density of only 1/3 to 1/2 that of ordinary clay bricks, they can significantly reduce the load on the furnace’s steel structure, thereby lowering construction and maintenance costs.


Easy to Install: Standard, custom-shaped, and curved bricks are available to meet specific needs. They are easy to cut, allowing for high-efficiency masonry work and rapid adaptation to the kiln’s contours.


Cost-Effective and Energy-Efficient: Achieves significant energy savings with a low initial investment. The cost of the insulation layer is recouped in the short term, making it an effective thermal management solution for glass melting furnaces.


Applications:

Insulation for low-to-medium temperature areas not in direct contact with molten glass, including furnace wall backing, furnace bottom insulation, heat storage chamber exterior walls, flue lining insulation, chimney insulation, inspection hatches, and furnace door covers. Suitable for energy-saving masonry in all types of glass melting furnaces.

Indicators
ProjectsPhysical and chemical indicators

NG140-

1.5

NG135-

1.3

NG135-

1.2

NG130-

1.0

NG125-

0.8

NG120-

0.6

NG115-

0.5

Bulk density/(g/cm3)≤1.51.31.21.00.80.60.5
Compressive strength at room temperature/Mpa≥6.05.04.53.52.51.31.0
Heating Permanent Line Change/%Test conditions

1400℃×

12h

1350℃×12h

1300℃×

12h

1250℃×

12h

1200℃×

12h

1150℃×

12h

Xmin~Xmax-2~1

Thermal conductivity/[W/m.K]

Average temperature (350±25) °C

Xmax≤0.650.550.500.400.350.250.23


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Phone:+8615517585977
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Email:info@azs-brick.com