Microsilica (Silica Fume)is a by product of producing silicon metal or ferrosilicon .. The smoke that results from furnace operation is collected and sold as silica fume, rather than being landfilled. Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO₂)
SiO₂ ≥85%

CI ≤0.02

Surface area: 15-27m²/g

Bulk density: 600-700kg/m³

Moisture ＜3

Loss on Ignition ≤6.0