Xiamen Yulin

Silica fume, also called as micro silica, silica dust, which is a by-product of producing silicon metal or ferrosilicon alloys. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2). The individual particles are extremely small, approximately 1/100th the size of an average cement particle. Because of its fine particles, large surface area, and the high SiO2 content, silica fume is a very reactive pozzolan when used in concrete. The quality of silica fume is specified by ASTM C 1240 and AASHTO M 307. Specification : Analysis ResultSF85 SF88 SF90 SF92 SF94 SF96SiO2(%)(min.) 85.05 88.05 90.05 92.05 94.05 96.05Fe2O3(%) 0.78 0.44 0.21 0.25 0.20 0.17Al2O3(%) 0.29 0.20 0.21 0.25 0.20 0.15CaO(%) 0.39 0.31 0.31 0.36 0.21 0.18K2O+ Na2O (%) 0.29 0.24 0.22 0.20 0.20 0.20Moisture(%) 3.05 2.55 2.05 2.05 1.03 0.85Loss on Ignition (L.O.I) @975OC(%) 3.38 3.10 2.38 1.75 1.50 1.25Bulk Density (kg/m) 250-750 250-750 250-750 250-750 250-750 250-750

Silicon Rubber: Improves silicon rubbers durability, rebound rate, and anti-distortion performance.Plastics Industry: Improves plastic s tenacity, strength and prevents water absorption.Coating Industry: Prevents agglomeration and drip. Thixotropic additives. Increase denseness and smoothness of paint. Medicine Industry: Increase denseness , floating , carrying function in medicine. It also can be used as the pesticide powder and anti-agglomeration. SpecificationType 813 815 900ASiO2 90 91 94Residue on sieve(45um) 0.5 0.5 0.5Heating Loss % 7.0 7.0 7.0Ignition Loss % 7.0 7.0 7.0PH 6.0-7.0 6.0-7.0 6.0-7.0Fe mg/kg 300 260 200DBP cm/g 2.8 2.8 3.0Specific Surface m/g 180-220 200-230 220-260conductivity s/cm 300 150 110Sulfate % 0.3 0.15 0.1Bulk Density g/ml 0.16 0.16 0.16packing 15kg 15kg 15kgAppearance White Powder White Powder White Powder