Light Corundum Mullite Bricks |
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Light corundum mullite bricks are prepared by sintering of high temperature after molding taking white corundum，fused mullite and abletive agent mixedin definite proportion as raw material. The products have the advantages of high temperature resistance，low thermal conductivity（good insulating efficiency，thin kiln wall and low cost），high strength，and high thermal shock stability. They are widely usedin various inner linings and heat insulation layers of high temperature kilns. |
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Physical and Chemical Indexes of Light Corundum Mullite Bricks
Indexes /
Brand
|
GMQ1600 |
GMQ1750 |
AL2O3 % ≥ |
66 |
85 |
Bulk density g/cm3 |
1.3 |
1.5－1.7 |
Compressive strength at normal temperature MPa ≥ |
15 |
20 |
Reheating linear shrinkages 1600℃×3h % ≤ |
0.2 |
0.2 |
Thermal conductivity(
hot side
1000℃)W/m.k ≤ |
0.6 |
1.0 |
Thermal shock stability
(1000℃
cooled in atmosphere
)
per time
≥ |
50 |
50 |
Max. usage temperature(
1000
℃) |
1600 |
1700－1750 |
Applications |
Used for inner linings of high temperature kiln |
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Physical and Chemical Indexes of Light Mullite Bricks
Brand |
MQ-1350 |
MQ-1450 |
MQ-1500 |
JM-26 |
JM-28 |
JM-30 |
JM-32 |
Chemical composition |
Al2O3 % ≥ |
55 |
60 |
65 |
58 |
67 |
73 |
77 |
SiO2 % ≤ |
43 |
38 |
33 |
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Fe2O3 % ≤ |
1 |
0.7 |
0.7 |
0.7 |
0.6 |
0.5 |
0.4 |
Temperature for long-time service
（
Classified temperature
）℃ |
1350 |
1400 |
1500 |
1430 |
1540 |
1650 |
1760 |
Bulk density g/cm3 |
0.8-1.0 |
0.8-1.0 |
0.8-1.0 |
0.8 |
0.9 |
1.0 |
1.25 |
Compressive strength at normal temperature
MPa ≥
|
3 |
4 |
5 |
1.6 |
2.1 |
2.5 |
3.5 |
Reheating Linear shinkage
% ≤
|
1350℃×4h
0.5 |
1400℃×4h
0.5 |
1500℃×4h
0.5 |
1400℃×24h
0.4 |
1510℃×24h
0.5 |
1620℃×24h
0.9 |
1730℃×24h
0.9 |
Thermal conductivity W/m.k ≤ |
350℃
0.4 |
350℃
0.4 |
350℃
0.4 |
1200℃
0.35 |
1200℃
0.41 |
1200℃
0.47 |
1200℃
0.56 |
Soften point at
0.1MPa ℃ ≥ |
1300 |
1350 |
1450 |
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