The silica fume is also called microsilica or microsilica fume. When ferroalloy is smelting ferrosilicon and industrial silicon (metal silicon). A lot of volatile SiO2 and Si gases are produced in the submerged arc furnace. After the gas is discharged, it is rapidly oxidized, condensed and precipitated with air. It is a byproduct of large industrial smelting. The whole process needs to be recycled by using dust removal and environmental protection equipment, because the quality is relatively light, and densified equipment is also needed for encryption.
Physical and chemical properties of Silica fume:
Name: Microsilica or Silica fume
Silica fume: the appearance is grey or gray – white powder, and the refractoriness is >1600℃.Bulk density: 200-250kg/m3.
The fineness of silica fume: the fineness of the silica fume less than 1um is over 80%, the average particle size is from 0.1 to 0.3um, and the specific surface area is 20 – 28 m2/g. The fineness and specific surface area are about 80-100 times of the cement and 50-70 times of the fly ash.
Particle morphology and mineral structure: during the formation process of silica fume, the amorphous phase is formed by the action of surface tension due to the effect of surface tension during the formation of phase change, and the surface is smooth. Some are aggregates with multiple spherical particles adhered together. It is a very high surface area and highly active volcanic ash. With silica fume, tiny spheroids can be lubricated.
The appearance is grey powder, SiO2 content is 92%, and has high densified and semi densified microsilica products. It can be applied to high-grade refractories, baffle, silicon carbide cover and so on. It is used as a necessary admixture.
Silica Fume meets the requirements of ASTM C-1240 and contains a minimum of 85% silicon dioxide (SiO2)
Packaging & Delivery:
10kg soluble paper bags x 84 on the pallets.
20kg soluble paper bags x 42 on the pallets.
950kg plastic woven bags x 2 on the pallets(with or without bottom output )
1000kg plastic woven bags x 2 on the pallets(with or without bottom output )
500kg plastic woven bags x 2 on the pallets (with or without bottom output )
We can also produce according to your requirement.
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