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Refactory Material
Abrasives
Steel Additive
Alloy
Fused Mullite
1st Grade
2st Grade
Al
2
O
3
70-77%
60-70%
SiO
2
22-29%
25-35%
Fe
2
O
3
0.1% max
1.0% max
Refractoriness
1850℃
1800℃
Mullite phase
95% min
90% min
Physical Properties
Chemical Properties
Physical Porperty
Apparent Porosity% ≤
5
Bulk Density% g/cm
3
≥
3.00
Refractoriness℃
≥1850
Brand
Property
GRIT(>0.1mm)
FINE(≤0.1mm)
Chemical Composition
Al
2
O
3
%
70-77
70-77
SiO
2
%
22-29
22-29
Fe
2
O
3
%
≤0.20
≤0.30
TiO
2
%
≤0.10
≤0.10
CaO%
≤0.30
≤0.30
Na
2
O%
≤0.30
≤0.50
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