Sillimanite Flour

Typical Mineralogy

Mineral Typical
Sillimanite 93-94%
Rutile/Ilmenite 1-2%
Zircon 1-1.5%
Quartz 1-3%
Typical Sieve Analysis
Mesh (Tyler screen) Cumulative wt. % retained
40 0.5
20 15
5 75
 
Sillimanite Granular – Chemical Analysis
AI2 O3 59.00% (min)
SiO2 32.80% (max)
Ti O2 00.50% (max)
Fe2 O3 00.40% (max)
P2 O5 00.03% (max)
Physical Properties
Specific Gravity 3.2
Bulk Density 1950-2050 Kg/Ml3
Hardness (MOHS) 7
Refractoriness 1800-1900 C
Expansion At 1550 C 7.00%
Sieve Analysis (Typical)
Mesh (Tyler screen) Sieve opening in microns Cumulative wt. % retained
35 425 0.0-0.1
48 300 0.5-2.5
65 212 3.0-10.0
100 150 30.0-50.0
150 106 85.0-95.0
200 75 99.0-100.0

Typical Chemical Analysis

Content % Standard Typical
Al2O3 min 57 58
TiO2 max 2.0 1.2
Fe2O3 max 0.8 0.7
CaO max 0.2 0.1
MgO max 0.4 0.2
Na2O + K2O max 01 0.1
Th + U max 25 ppm 25 ppm
Moisture max 0.5 0.1
Typical Physical Properties
Appearance Dry Powder of Light Grey Color
Melting Point 1850oC
Mullate Transformation 1350-1540oC
Specific Gravity 3200-3500 Kg/m3
Bulk Density 960 Kg/ m3
Grain Size 63-200 mkm
Solubility in Water Insoluble
Angle of Friction 32oC
Hardness 6
pH 6.5-7.0

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