Description
1. Introduction:
Ferro silicon is a ferroalloy, an alloy of iron and silicon with an
average silicon content between *5 and *0 weight percent.It
contains a high proportion of iron silicides.
2. Made up process:
Ferro silicon is produced by reduction of silica or sand with coke
in presence of scrap iron, millscale, or other source of iron.
Ferro silicons with silicon content up to about *5% are made in
blast furnaces lined with acid fire bricks. Ferro silicons with
higher silicon content are made in electric arc furnaces. The usual
formulations on the market are ferro silicons with *5%, *5%, *5%,
and *0% silicon. The remainder is iron, with about 2% consisting of
other elements like aluminium and calcium. An overabundance of
silica is used to prevent formation of silicon carbide. Microsilica
is a useful byproduct.
3. Application:
A. Ferro silicon is used as a source of silicon to
reduce metals from their oxides and to deoxidize steel and other
ferrous alloys.This prevents the loss of carbon from the molten
steel (so called blocking the heat)
B. It can be used to make other ferroalloys. Ferro
silicon is also used for manufacture of silicon,
corrosion-resistant and high-temperature resistant ferrous silicon
alloys, and silicon steel for electromotors and transformer cores.
In the manufacture of cast iron, ferro silicon is used for
inoculation of the iron to accelerate graphitization. In arc
welding, ferrosilicon can be found in some electrode coatings.
C. Ferro silicon is a basis for manufacture of
prealloys like magnesium ferro silicon (MgFeSi), used for
modification of melted malleable iron. Ferro silicon is also
important as an additive to cast irons for controlling the initial
content of silicon.
D. Ferro silicon is also used in the Pidgeon process to make
magnesium from dolomite.
4. Chemical composition:
Type Chemical Composition (%)
Si Mn Cr C P S
≤
Fesi*5A *4.***0.0 0.4 0.3 0.1 0.**5 0.*2
Fesi*5B *4.***0.0 0.4 0.3 0.1 0.*4 0.*2
Fesi*5C *2.***0.0 0.5 0.5 0.2 0.*4 0.*2
Fesi*5 *5.***2.0 0.6 0.5 *- 0.*4 0.*2
Contact Person: David Wong
**************0
xzljmetal(at)gmail doc com
