Mullite Brick
Product Description:
Mullite ore is a rare silicate mineral of post-clay genesis. It can form two stoichiometric forms 3Al2O32SiO2 or 2Al2O3 SiO2. Unusually, mullite has no charge balancing cations present. As a result, there are three different Al sites: two distorted tetrahedral Al sites and one Al other site which adopts a higher co-ordinate octahedral state.
Mullite bricks, based on synthetic fused mullite and sintered mullite, are manufactured by selected shaping processes and fired in high temperature furnaces. Mullite bricks are preferred for high thermal stress applications, such as at the hot end of regenerative chambers of glass melters, in the superstructure of the furnace, and in particular in the arch of glass fiber melters, due to their excellent thermal properties and adequate corrosion resistance.
Technical Parameters:
Mullite ore is a rare silicate mineral of post-clay genesis. It can form two stoichiometric forms 3Al2O32SiO2 or 2Al2O3 SiO2. Unusually, mullite has no charge balancing cations present. As a result, there are three different Al sites: two distorted tetrahedral Al sites and one Al other site which adopts a higher co-ordinate octahedral state.
Mullite bricks, based on synthetic fused mullite and sintered mullite, are manufactured by selected shaping processes and fired in high temperature furnaces. Mullite bricks are preferred for high thermal stress applications, such as at the hot end of regenerative chambers of glass melters, in the superstructure of the furnace, and in particular in the arch of glass fiber melters, due to their excellent thermal properties and adequate corrosion resistance.
Technical Parameters:
|
Index
|
Sintered Zircon Mullite Brick
|
Sintered AZS Brick
|
|
AL2O3%
|
46-70
|
48-70
|
|
ZrO2%
|
8-20
|
18-30
|
|
Refractoriness ℃
|
1750-1790
|
1770-1790
|
|
Bulk Density g/cm3
|
2.5-3.3
|
2.8-3.4
|
|
Apparentporosity %
|
11-20
|
11-20
|
|
Cold Crushing Strength Mpa
|
80-180
|
80-180
|
|
Refractoriness under Load ℃
|
1580-1650
|
1600-1680
|
|
Index
|
Compound Sillimanite Brick
|
Corundum-Mullite Brick
|
|
AL2O3 %
|
52-75
|
76-95
|
|
AL2O3+SiO2 %
|
>97
|
>97
|
|
Fe2O3 %
|
<0.8
|
<0.5
|
|
R2O %
|
<0.6
|
<0.5
|
|
Refractoriness ℃
|
>1790
|
>1810
|
|
Bulk Density g/cm3
|
2.4-2.6
|
2.6-3.15
|
|
Apparentporosity %
|
13-22
|
13-22
|
|
C.C. Strength Mpa
|
60-160
|
60-160
|
|
T.S.R(1,000℃-Water)
|
>20 times
|
>20 times
|
|
P.L.C(1,400℃*2h)
|
±0.1
|
±0.1
|
|
Usage: The products can be widely used in burner block electrical-heating cover plate forehearth, material-feeder machine drag-tube machine blow-bubble machine, corundum-mullite crown brick etc. of galss industry.
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