Fire Clay Brick,Clay Insulating Refractory Brick:
Feature:
Al2O3 content is 30%-48%, SiO2 content is 50%-65%, and a small number of alkali metals, alkaline earth metal oxides, etc.
Application:
Clay insulating refractory Brick is used in high temperature insulation layer of furnace that has high refractoriness and good thermal shock resistance. It can reduce the radiation loss of the kiln, save energy and reduce the weight of the hot working equipment. The insulation brick is not suitable for using in the bearing structure of the kiln and also it is not suitable to contact slag, furnace charge, molten metal and other parts.
Secification:
Item |
NG-1.5 |
NG-1.3a |
NG-1.3b |
NG-1 |
NG-0.9 |
NG-0.8 |
Bulk density g/cm3,≤ |
1.5 |
1.3 |
1.3 |
1 |
0.9 |
0.8 |
Compress strength MPa |
≥5.9 |
≥4.4 |
≥3.9 |
≥2.9 |
≥2.5 |
≥2. 5 |
Testing temperature
when reheated with 2% contracting rate ºC |
1400 |
1400 |
1350 |
1350 |
1300 |
1250 |
Thermal conductivity ,W/m·K(350ºC±25ºC) |
≤0.7 |
≤0.6 |
≤0.6 |
≤0.5 |
≤0.4 |
≤0.35 |
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