Fume, dust and sewage treatment
International Standard
DUSTTM Silica Fume(Microsilica) contains 85% to 96% silicon dioxide
Items | Data | ||||||
SF96 | SF94 | SF92 | SF90 | SF85 | |||
SiO2 | % | ≥ | 96.0 | 94.0 | 92.0 | 90.0 | 85.0 |
Al2O3 | % | ≤ | 1.0 | 1.0 | 1.5 | - | - |
Fe2O3 | % | ≤ | 1.0 | 1.0 | 2.0 | - | - |
CaO+MgO | % | ≤ | 1.0 | 1.5 | 2.0 | - | - |
K2O+Na2O | % | ≤ | 1.0 | 1.5 | 2.0 | - | - |
C | % | ≤ | 1.0 | 2.0 | 2.0 | 2.5 | 2.5 |
Clˉ | % | ≤ | 0.1 | 0.1 | 0.1 | 0.2 | 0.3 |
pH | 4.5-7. | 4.0-8.5 | 4.0-8.5 | 4.0-8.5 | - | ||
Loss on ignition | % | ≤ | 1.0 | 3.0 | 3.0 | 4.0 | 6.0 |
H2O | % | ≤ | 1.0 | 2.0 | 2.5 | 3.0 | 3.0 |
Specific surface area | ㎡/g | ≥ | 15 | 15 | 15 | 15 | 15 |
Retention on 45 microns | % | ≤ | 2.0 | 3.0 | 3.0 | 5.0 | 10.0 |
Volcanic Ash Activity Index（28d) | % | ≥ | 85 | 85 | 85 | 85 | 85 |
Water content ratio | % | ≤ | 125 | 125 | 125 | 125 | |
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