Corundum - mullite brick refers to high purity or pure raw materials made of refractory products. Using industrial alumina powder and pure clay, bauxite or silica as raw materials to synthesize pure mullite raw materials, low content of alkali metal oxides.
The products made with mullite grain as aggregate have good thermal shock resistance, and the products made with corundum sand as aggregate have good corrosion resistance.
(1) Good high temperature strength
(2) Good thermal shock resistance
(3) Long service life
(4) Strong thermal conductivity
(5) Low creep rate
Petrochemical industry, metallurgy industry, glass industry, Chemical industry, energy industry.
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Item |
Index |
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|
GMZ-88 |
GMZ-85 |
GMZ-80 |
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|
Standards |
Measured Values |
Standards |
Measured Values |
Standards |
Measured Values |
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|
化学成分 |
Al2O3（%≥） |
80 |
85.17 |
85 |
83.29 |
80 |
80.5 |
|
Fe2O3（%≤） |
0.8 |
0.48 |
1 |
0.7 |
1 |
0.73 |
|
|
Body density（g/cm3） |
≥3.0 |
3 |
≥2.85 |
2.92 |
≥2.75 |
2.8 |
|
|
porosity（%≤） |
15 |
13.75 |
16 |
14.88 |
18 |
16.23 |
|
|
Cold pressing strength（Mpa） |
≥120 |
132 |
≥100 |
112 |
≥100 |
103 |
|
|
Refractoriness under load/℃(0.2Mpa,0.6%) |
≥1700 |
＞1700 |
≥1682 |
＞1700 |
≥1650 |
1675 |
|
|
Heating line changes /℃（1400℃×2h） |
-0.1~0.1 |
0.1 |
-0.1~0.1 |
0.1 |
-0.1~0.1 |
0.14 |
|
|
Thermal shock stability（1100℃） |
≥10 |
＞15 |
≥10 |
＞12 |
＞10 |
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