Micro silica 85%-98%

1.Description: 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. 2.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 AnalysisResultResultResultResultResultSF85SF88SF90SF92SF94SiO2(%)(min.)85.0588.0590.0592.0594.05Fe2O3(%)0.780.440.210.250.20Al2O3(%)0.290.200.210.250.20CaO(%)0.390.310.310.360.21K2O+ Na2O (%)0.290.240.220.200.20Moisture(%)3.052.552.052.051.03Loss on Ignition (L.O.I) @975OC(%)3.383.102.381.751.50Bulk Density (kg/m³)500-700500-700500-700500-700500-700 2)Specification-Refractory Grade AnalysisResultResultResultResultResultSF94SF95SF96SF97SF98SiO2(%)Min94.5095.5096.5097.1098.1Fe2O3(%)Max0.250.230.20.10.7Al2O3(%)Max0.250.220.20.10.7CaO(%)Max0.350.300.250.150.11Na2O + K2O(%)Max0.30.280.250.150.09Moisture(%)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)200-350200-350200-350200-350200-350 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. 7. Contact information: Fiona Fan Tel:86-592-5027786 Fax:86-592-5027285