Lightweight fireclay brick


Al2O3 content is 30%-48%, SiO2 content is 50%-65%, and a small number of alkali metals, alkaline earth metal oxides, etc.
Mineral composition is usually mullite, quartz and glass phase. Its refractoriness is 1580-1750°C, refractoriness under load is 1250-1450 °C, line expansion coefficients is low, with good thermal shock resistance and strong ability to resist erosion acid slag.
  • Lightweight fireclay brick
  • Lightweight fireclay brick
  • Lightweight fireclay brick
  • Lightweight fireclay brick
  • Lightweight fireclay brick
  • Lightweight fireclay brick
  • Lightweight fireclay brick
  • Lightweight fireclay brick
Lightweight fireclay brick
Lightweight fireclay brick
Lightweight fireclay brick
Lightweight fireclay brick

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Description

Al2O3 content is 30%-48%, SiO2 content is 50%-65%, and a small number of alkali metals, alkaline earth metal oxides, etc.
Mineral composition is usually mullite, quartz and glass phase. Its refractoriness is 1580-1750°C, refractoriness under load is 1250-1450 °C, line expansion coefficients is low, with good thermal shock resistance and strong ability to resist erosion acid slag.
This brick with high strenght and thermal conductivity, which can be widely applied for different kiln as insulating layer.
Size can be made according to requirements

 

Advantage: 

  • High strength at high temperature
  • Corrosion and spalling resistance
  • can be used both as building brick and insulating brick
  • According to smelting condition and the kind of smelting steel, different brands and shapes refractory bricks  are available
Application

Widely used for the lining of the acid kiln, also used for the blast furnace, hot blast furnace, glass kiln and high-temperature kiln such as carbon baking kiln.

Specification:

Brand

Clay insulating bricks 

NG-0.5

NG-0.6

NG-0.8

NG-1.0

Bulk density g/cm3≤   

0.5

0.6

0.8

1

Crushing strength Mpa≥

1.5

2

2.5

3.4

The experimental temperature of linear change ≤2%

1250

1300

1350

1350

Thermal conductivity 350±25(W/m.k) ≤

0.18

0.25

0.35

0.5

Refractoriness under load 

1160

1250

1280

1300

Al2O3 % ≥

35

40

42

42

Fe2O3 % ≥           

2.5

2.5

2

2

 

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