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Ferro fume .Color:gray or White gray

Ferro fume .Color:gray or White gray

Place of Origin : China
Brand Name : AG
Model Number : Ferro fume
Packaging Details : as your mind
Delivery Time : 15-20days
Payment Terms : 30%T/T, the remaing againest the copy of B/L
Supply Ability : 10000Ton/month
MOQ : 20
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Silica Fume
1.Color:gray or White gray
2.Packing:1mt/big bag , 25kg/bag
4.It is widely applied in refractory industry.

Silica Fume

Silica fume (also called silicon ash or condensed silica fume) is formed by condensation and sediment of strongly-volatile SiO2 and Si from ore-smelting electric furnaces which are exhausted and oxidized with air during smelting of ferrosilicon and industrial silicon (metallic silicon) with ferroalloy. It is one byproduct of large-scale industrial smelting, and the whole process requires dedusting device to recycle it. As its mass is low, sometimes it needs an encryption device due to different purposes.


Index of Silica Fume (Take SiO2 92% for example)
ItemIndex(%)Typical Value
Loss on ignition≤61-2
Water demand ratio≤125120
Specific surface area≥1500018000-20000


It is widely applied in refractory industry, and plays an important role in improvement of amorphous refractory.

(1) There are many pores in conventional refractory, and to fill silica fume in the pores is good for improvement of volume density, reduction of porosity and sharp enhancement of strength.

(2) Silica fume has stronger activity, can form colloid particles in water. After adding some dispersing agent, it can enhance flowability and improve casting property.

(3) Silica fume is easy to form Si-OH base in water, and has stronger hydrophilicity and activity, so it is able to enhance refractory condensation, improve high-temperature property and prolong service life of refractory products.

Silica fume is extensively used in the refractory industry, specifically showing as following in practice.

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Ferro fume

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