Specifications
MicrosilicaSiO2: 85%-98%
LOI: 2%MAX
PAI: 110%Min
Micro silica is widely used
Microsilica is a very fine pozzolanic material, composed of amorphous silica produced by electric arc furnaces as a byproduct of the production of elemental silicon or ferro silicon alloys. Microsilica is also called as silica fume, fumed silica, silica dust, which is widely used in concretes field and refractorys field. The microsilica used in refractory has a minimum of 92% content of silica, the average content of SiO2 is around 93%.And this densified microsilica reaches national first grade standard,80% of granularity is less than 0.1 um with a maximum of 0.3 um.
Application in refractory
Microsilica in refractory is a highly effective pozzolanic material, the functions of adding microsilica are as follow:
1) enhancing the fluid of pouring refractory
2) reducing the volume of used water
3) be easy to shape
4) raising the production efficiency
5) microstructure for gap filling
6) rising the compact and intensity of refractory
7) enhance elevated temperature strength and thermal shock of refractory.
8) minimizes rebound loss
3.Spec.
1)Specification-Building Grade
Analysis | Result | Result | Result | Result | Result |
SF85 | SF88 | SF90 | SF92 | SF94 | |
SiO2(%)(min.) | 85.05 | 88.05 | 90.05 | 92.05 | 94.05 |
Fe2O3(%) | 0.78 | 0.44 | 0.21 | 0.25 | 0.20 |
Al2O3(%) | 0.29 | 0.20 | 0.21 | 0.25 | 0.20 |
CaO(%) | 0.39 | 0.31 | 0.31 | 0.36 | 0.21 |
K2O+ Na2O (%) | 0.29 | 0.24 | 0.22 | 0.20 | 0.20 |
Moisture(%) | 3.05 | 2.55 | 2.05 | 2.05 | 1.03 |
Loss on Ignition (L.O.I) @975OC(%) | 3.38 | 3.10 | 2.38 | 1.75 | 1.50 |
Bulk Density (kg/m³) | 500-700 | 500-700 | 500-700 | 500-700 | 500-700 |
2)Specification-Refractory Grade
Analysis | Result | Result | Result | Result | Result |
SF94 | SF95 | SF96 | SF97 | SF98 | |
SiO2(%)Min | 94.50 | 95.50 | 96.50 | 97.10 | 98.1 |
Fe2O3(%)Max | 0.25 | 0.23 | 0.2 | 0.1 | 0.7 |
Al2O3(%)Max | 0.25 | 0.22 | 0.2 | 0.1 | 0.7 |
CaO(%)Max | 0.35 | 0.30 | 0.25 | 0.15 | 0.11 |
Na2O + K2O(%)Max | 0.3 | 0.28 | 0.25 | 0.15 | 0.09 |
Moisture(%)Max | 1.75 | 1.45 | 1.1 | 0.8 | 0.65 |
Loss on Ignition | 1.65 | 1.55 | 1.45 | 1.30 | 1.02 |
Bulk Density (kg/m3) | 200-350 | 200-350 | 200-350 | 200-350 | 200-350 |
4. Packing: Building Grade: 900kg/bag or as per customer’s request
Refractory Grade: 500kg/bag, 2 bags with one pallet.
5. Capacity: Building Grade: 18-20 MT into one 20 FCL.
Refractory Grade: 20MT into one 40HQ.
6. Delivery Time: 3 weeks after payment.