Densified Microsilica 85%- 96% Min Grade

We are offering densified microsilica 85%- 96% min grade.
Sio2 :85%- 96% min
loi :4% max
h2o :2% max
specific surface area:15000g-20000sqmkg
pozz. Activity :110% min
bulk density :550-700kgsm3 300kgm3-380kgm3
material form :powder grain
color :grey dark greywhite
standard :sgs certificate with astm-c1240 standard
introduction
micro silica ,also called silica fume or micro silica, is a byproduct of production silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces.the raw materials are quartz,coal and woodchips.the smoke that results from furnace operation is collected and sold as silica fume, silica fume consists primarily of amorphous(non-crystalline) silicon dioxide(sio2),its average granule diameter is 0.15~0.20um,specific surface area is 15000~20000m2kg,and it has extremely strong surface active.