Ferro-silicon (Fe-Si) is a ferro-alloy having iron (Fe) and silicon (Si) as its main elements. The ferro-alloy normally contains Si in the range of 15 % to 90 %. The usual Si contents in the Fe-Si available in the market are 15 %, 45 %, 65 %, 75 %, and 90 %. The remainder is Fe, with around 2 % of other elements like aluminum (Al) and calcium (Ca).
Fe-Si is produced industrially by carbo-thermic reduction of silicon dioxide (SiO2) with carbon (C) in the presence of iron ore, scrap iron, mill scale, or other source of iron. The smelting of Fe-Si is a continuous process carried out in the electric submerged arc furnace (SAF) with the self-baking electrodes.
Boiling point of Si is 2355 deg C.Fe-Si is known to possess good resistance to abrasion and good resistance to corrosion.Fe-Si is usually available in lump or granular form. Coarser lumps are used for better slag penetration during deoxidation while finer sizes ensure rapid dissolution when used as an alloying addition.
In addition, ferrosilicon production also requires electricity costs, and electricity costs account for the largest proportion of the cost. The production of ferrosilicon affects the supply of ferrosilicon in the market. This will have an impact on the market price of ferrosilicon.
Ferrosilicon is an iron alloy that composed of iron and silicon. FeSi 15 lump 10mm-100mm is used in the manufacture of cast iron. Fe-Si with 15 % Si is not used for metallurgical purposes in the production of steel or cast iron.
Ferrosilicon is an iron alloy that composed of iron and silicon. FeSi 45 lump 10mm-100mm is a source of Si to reduce metals from their oxides and to deoxidize steel and other ferrous alloys. Promoting the precipitation graphite is one functions of the ferrosilicon 45.
Ferrosilicon is an iron alloy that composed of iron and silicon. FeSi 65 lump 10mm-100mm is used in the Pidgeon process to make magnesium from dolomite. Low consumption and cost for ferrosilicon 65 is used in casting, melting and related metallurgy industry.
Ferrosilicon is an iron alloy that composed of iron and silicon. FeSi 75 lump 10mm-100mm is used as an additive to cast irons for controlling the initial content of Si. Low electrical conductivity, poor thermal conductivity and strong magnetic permeability.
Ferrosilicon is an iron alloy that composed of iron and silicon. FeSi 90 lump 10mm-100mm is a FeSi alloy with 90% silicon content in lump from raging from 10mm-10mm. It is used for the production of semiconductor pure Si in electric industry and Si copper in chemical industry.
Grade |
Ferro Silicon (Normal AI.) |
Ferro Silicon (low AI.) |
Ferro Silicon (extra low AI.) |
|---|---|---|---|
| -- | Fe Si 70 | Fe Si 70 (Low AI) | Fe Si 70 (Extra AI) |
| Si(%) | 70 Min | 70 Min | 70 Min |
| C(%) | 0.15 Max | 0.15 Max | 0.15 Max |
| S(%) | 0.05 Max | 0.05 Max | 0.05 Max |
| P(%) | 0.05 Max | 0.05 Max | 0.05 Max |
| AI(%) | 2.0 Max | 1.0 Max | 0.5 Max |
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