Ferro Silicon (FeSi)


Product Description:

Ferrosilicon is a ferroalloy of silicon and iron. The ratio in which the two chemical substances are combined varies, with the proportion of silicon ranging anywhere between 15% and 90%. This alloy is also known by the name ferrosilicium.

PreRish Tri is producing a high-quality Ferrosilicon by reducing sand or silica with coke and reacting it with iron derived from scraps or mill scale. Ferrosilicon having 15% silicon content can be derived from blast furnaces using acid firebricks.

PreRish Tri is also obtaining this alloy by using a submerged electric arc furnace for melting quartz, steel scrap together with a reluctant. The hot liquid alloy is then collected in a sandbed, cooled and broken into small pieces. These small pieces are crushed further to obtain the required size. Large quantities of silica are required for preventing silicon carbide formation. Microsilica is an important by-product we obtaining from this reaction.

Ferrosilicon Chemical and Physical Properties:

The physical and chemical properties of Ferrosilicon are listed below:

Molecular Weight: The molecular weight of this alloy is 28.0855 g/mol.

Melting Point: The melting point of this substance varies with the content of silicon. FeSi 45 contains 45% silicon and its melting point ranges between 1215°C and 1300°C. FeSi 75 contains 75% silicon and its melting point ranges between 1210°C and 1315°C. FeSi 90 contains 90% silicon and its melting point ranges between 1210°C and 1380°C.

Boiling Point: The boiling point for this substance is 2355°C.

Appearance: The shape of ferrosilicon powder particles can be spherical or irregular, like lumps, crushed or milled.

Specific Gravity: Specific Gravity of ferrosilicon varies with the proportions in which the two chemical substances are mixed. For FeSi 75, the specific gravity is 3.01.

Ferrosilicon Uses

  • Ferrosilicon is used in deoxidizing steel as well as other ferrous alloys. This helps to prevent loss of carbon from molten steel.
  • This alloy is also used in the manufacturing of other ferroalloys.
  • Ferrosilicon is extensively used in the metallurgical industry for the processes of atomization, casting, melting and heavy media separation reactions.
  • The alloy is used as a basic raw material for inoculation, adjusting, suspending, mineral processing and in the melting rod industry. It is also used for deoxidization and coating in steel melting.
  • Ferrosilicon is used as a source of pure silicon in the electric industry.
  • It is used to manufacture silicon copper in the chemical industry.
  • Ferrosilicon is used in the manufacturing of semiconductors.
  • It is used for making silicon steel that are used in transformer cores and electromotors.
  • Ferrosilicon is also sometimes used as a component in electrode coatings for arc welding.
  • It is used as a source of silicon as well as to produce high-temperature resistant and corrosion-resistant ferrous silicon alloys.
  • Ferrosilicon is an important component in Pidgeon process. In this process, magnesium can be derived from dolomite.
  • Chemical Composition
Element Content (%)
Silicon, Si 74 – 78
Iron, Fe ≥ 21.32
Aluminum, Al ≤ 0.50
Carbon, C ≤ 0.050
Sulfur, S ≤ 0.0030
Phosphorous, P ≤ 0.020