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Clay insulation bricks, also known as clay insulation bricks, are insulation refractory products made from refractory clay as the main raw material with an Al ₂ O Å content of 30%~48%. Its production process adopts burn out addition method and foam method. Using fire-resistant clay, floating beads, and fire-resistant clay clinker as raw materials, adding binders and sawdust, after batching, mixing, forming, drying, and firing, a volume density of 0.3~1.3g/cm is obtained ³ Product. The production of clay based insulation bricks accounts for more than half of the total production of insulation refractory bricks.
Physical and chemical indicators>>
PNG-1.3
PNG-1.0
PNG0.8
PNG-0.5
PNG-0.3
Al2O3%≥
42
40
bulk density
g/cm3≤
1.3
1
0.8
0.5
0.3
cold crushing strength
Mpa≥
8
6
4
2
Test temperature ℃ with a change of no more than 2% in the reheating line
1400
1350
1250
1150
1100
thermal conductivity
W/m.k
0.55
0.4
0.35
0.25
0.18
Average temperature (350 ℃± 25 ℃)≤
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