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 15000~20000m2/kg,and it has extremely strong surface active.
We can produce&supply follow grade:
80D (SiO2 80%min)
85D (SiO2 85%min)
90D (SiO2 90%min)
92D (SiO2 92%min)
AND 85U,90U,92U
Other spec as referrance:
LOI: 6% Max ,Cl : 0.3% Max F-CaO:1% max SO3: 2% max, PH: 8% max Moisture: 1.5% max
Active Index(7 days):100min
Densified type DP : 600-700
Packing term: 1000kgs /jumbo bag
Application 1) Cementitous Repair Products (Mortars & Grouts) • Low permeability, increase resistance from chlorides, acids, nitrates and sulfate etc 2) Oil Well Grouting • Increase durability and compressive strength, decrease permeability, better control of gas leakage 3) Concrete Tile, roofing & wallboard,panels • Lightweight and improve the strength 4) other application, such as waterglass industry, thermal insulation material etc.
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