Sell silica fume (microsilica)

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Silica fume (also named silicon ash or Microsilica) , a co-product of the silicon and ferrosilicon
metal industry, is an amorphous silicon dioxide (SiO2) which is generated as a gas in submerged electrical arc furnaces during the reduction of very pure quartz. This gas vapor is condensed in bag house collectors as very fine gray to off-white powder of spherical particles that average 0.1 to 0.3 microns in diameter with a surface area of 20 to 30 m2/g.

Type SiO2 Al2O3 Fe2O3 C K2O+Na2O CaO+MgO PH
SF-94 >=94% <=1.0% <=1.0% <=1.0% <=1.0% <=1.0% <=6.5
SF-90 >=90% <=1.5% <=2.0% <=2.0% <=1.5% <=1.5%
SF-85 >=85% <=2.5% <=8.5

Physical Properties:

Whiteness Degree 40---50
Moisture <=3%
Ignition Loss <=5%
Specific Surface Area 2030 m2/g
Bulk Density (unidentified, when packed) 100-170kg/m3
Bulk Density (light-densified, when packed) 200-350kg/m3
Bulk Density (middle-densified, when packed) 350-500kg/m3
Bulk Density (high-densified, when packed) 500-700kg/m3