Grey Densified and undensified Micro Silica
Product
Densified Microsilica (scientific name "silica fume," Micro-silica or Silica Fume), in the smelting of ferrosilicon and industrial silicon, silicon through the flue gas emitted by steam oxidation, the specially designed filter collected the amorphous powder like silica (SiO 2).Microsilica fume average 0.1-0.15 μ m in diameter, the size of several cement average 1.0%. Surface area for the 15-27 m 2 / g, with strong surface activity.
Specification:
Analysis Result
| Analysis |
Result |
| SF85 |
SF88 |
SF90 |
SF92 |
SF94 |
SF96 |
SF97 |
SF98 |
| SiO2(%)(min.) |
85.05 |
88.05 |
99.05 |
92.05 |
94.05 |
96.05 |
97.5 |
98.5 |
| Fe2O3 (%) |
0.78 |
0.44 |
0.21 |
0.25 |
0.20 |
0.20 |
0.10 |
0.20 |
| Al2O3 (%) |
0.29 |
0.20 |
0.21 |
0.25 |
0.20 |
0.20 |
0.20 |
0.20 |
| CaO (%) |
0.39 |
0.30 |
0.36 |
0.30 |
0.30 |
0.30 |
0.30 |
0.30 |
| K2O+ Na2O (%) |
0.29 |
0.24 |
0.22 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
| Moisture (%) |
3.05 |
2.55 |
2.05 |
2.05 |
1.85 |
1.25 |
1.00 |
1.00 |
| Loss on Ignition (L.O.I) @975OC (%) |
4.38 |
3.38 |
2.38 |
2.38 |
2.28 |
1.88 |
1.55 |
1.50 |
Function
Dense castables
Improved flow
Hot strength
Strength during heat-up
Audited Supplier 
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