Si: 75% min Al:1.5-2% max C: 0.15-0.2% max S: 0.02% max P: 0.04% max Size: 10-50mm/50-100mm 90% min Packing: 1MT big bag PRICE: USD1210/MT FOB XINGANG
We have available a number of different specifications of Ferrosilicon.
Below is a typical specification for FeSi75, i.e with a Silicon content
of 75%.
Please click on the links for other specifications with silicon
contents of 65%,
70%
and 72%
For availability of this and other specifications, please
contact
us at sales@minerals-and-metals.com
About Ferrosilicon
Ferrosilicon is a ferroalloy, an alloy
of iron and silicon with between 15% and 90% silicon. It contains a
high proportion of iron silicides. Its melting point is about 1200 °C
to 1250 °C with a boiling point of 2355 °C. It also contains about 1 to
2% of calcium and aluminium.
Like most ferroalloys, ferrosilicon
is used in steelmaking and foundries as a source of silicon in the
production of carbon steels, stainless steels, and other ferrous alloys
for its deoxidizing properties, to prevent loss of carbon from the
molten steel. It can be used to make other ferroalloys and is also
used in the manufacture of silicon, corrosion-resistant and
high-temperature resistant ferrous silicon alloys, and silicon steel
for electro-motors and transformer cores.
Ferrosilicon is a
basis for the manufacture of pre-alloys such as magnesium ferrosilicon
(FeSiMg), used for modification of melted malleable iron. FeSiMg
contains between 3-42% of magnesium and small amounts of rare earth
metals. Ferrosilicon is also important as an additive to cast irons for
controlling the initial content of silicon. . Ferrosilicon is
produced by the reduction of silica or sand with coke in the presence
of scrap iron, millscale, or some other source of iron. Ferrosilicons
with a silicon content up to about 15% are made in blast furnaces lined
with acid fire bricks. Those with a higher silicon content are made in
electric arc furnaces. An overabundance of silica is used to prevent
the formation of silicon carbide.
The usual formulations on
the market are ferrosilicons with 15, 45, 75, and 90% of silicon. The
remainder is iron, with about 2% of other elements like aluminium and
calcium.
The melting point and density of ferrosilicon is dependent on its silicon content.
