Micro-silica powder is also called silica fume or condensed silica fume. It is produced by a large number of highly volatile SiO2 and Si gases in the ore thermal furnace. After gas emission, it is rapidly oxidized and condensed into the air. It is a by-product of large industrial smelting, the whole process needs to be recycled with dust removal environmental protection equipment, because of the low density, but also need to use encryption equipment for encryption.
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The average particle size of microsilica powder is 0.2um, and the specific surface area is 15,000 to 25,000 m2/kg. Its main component is silicon dioxide, the content of 85% to 95%, impurities for sodium oxide, calcium oxide, iron oxide, alumina and other metal oxides and a small amount of elemental carbon, silicon, etc. Because silicon dioxide in micro-silicon powder is an amorphous substance with high activity, fine particles, large specific surface area and excellent physical and chemical properties, it is widely used in concrete, refractory materials, wall materials, cement products, mortar, floor, chemical industry and other important fields used in special engineering.
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