Ferrosilicon, or ferrosilicium, is a
ferroalloyan alloy of ironand siliconwith 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 calciumand aluminium.
Ferrosilicon is used in
steelmakingand foundriesas a source of silicon in production of carbon steels, stainless steels, and other ferrous alloysfor its deoxidizingproperties, to prevent loss of carbonfrom the molten steel (so called "blocking the heat"); ferromanganese, spiegeleisen, silicides of calcium, and many other materials are used for the same purpose. It can be used to make other ferroalloys. Ferrosilicon is also used for manufacture of silicon, corrosion-resistant and high-temperature resistant ferrous silicon alloys, and silicon steelfor electromotors and transformercores. In manufacture of cast iron, ferrosilicon is used for inoculation of the iron to accelerate graphitization. In arc welding, ferrosilicon can be found in some electrode coatings.
Ferrosilicon is a basis for manufacture of
prealloys like magnesium ferrosilicon(FeSiMg), used for modification of melted malleable iron; FeSiMg contains between 3-42% of magnesiumand 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 also used in the
Pidgeon processto make magnesium from dolomite.
In contact with water, ferrosilicon may slowly produce
Ferrosilicon is produced by reduction of
silicaor sandwith coke in presence of scrap iron, millscale, or other source of iron. Ferrosilicons with silicon content up to about 15% are made in blast furnaces lined with acid fire bricks. Ferrosilicons with higher silicon content are made in electric arc furnaces. An overabundance of silica is used to prevent formation of silicon carbide. Microsilicais a useful byproduct.
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.
CAS numberis CASREF|CAS=8049-17-0.
perryiteis similar to ferrosilicon, with its composition Fe5Si2.
Ferrosilicon is used by the military to quickly produce
hydrogenfor balloons by the ferrosilicon method. The chemical reaction uses sodium hydroxide, ferrosilicon, and water. The generator is small enough to fit a truck and requires only a small amount of electric power, the materials are stable and not combustible, and they do not generate hydrogen until mixed. [ [http://naca.larc.nasa.gov/reports/1920/naca-report-40/] Dead link|date=March 2008]
The melting point and
densityof ferrosilicon is dependent on its silicon content.
* [http://www.turnstone.ca/silicide.htm Silicides in fulgurites and ferrosilicon]
Wikimedia Foundation. 2010.
Look at other dictionaries:
ferrosilicon — [fer΄ōsil′i kän΄] n. a compound of iron and silicon, used in making steel, as a deoxidizing agent, etc … English World dictionary
ferrosilicon — ferosilicis statusas T sritis chemija apibrėžtis Fe ir 9–95% Si lydinys. atitikmenys: angl. ferrosilicon rus. ферросилиций … Chemijos terminų aiškinamasis žodynas
ferrosilicon — noun Date: 1882 an alloy of iron and silicon containing 15 to 95 percent silicon and used for deoxidizing molten steel and making silicon steel and high silicon cast iron … New Collegiate Dictionary
ferrosilicon — /fer oh sil i keuhn, kon /, n. a ferroalloy containing up to 95 percent silicon. [1880 85; FERRO + SILICON] * * * … Universalium
ferrosilicon — noun An alloy of iron and silicon used in steelmaking … Wiktionary
ferrosilicon — Смотри Ферросилиций … Энциклопедический словарь по металлургии
ferrosilicon — fer·ro·silicon … English syllables
ferrosilicon — /fɛroʊˈsɪləkən/ (say feroh siluhkuhn) noun an alloy of iron containing up to 90 per cent silicon … Australian English dictionary
ferrosilicon — “+ noun Etymology: ferro + silicon : a crude alloy of iron and silicon containing 15 to 95 percent silicon and used for deoxidizing molten steel and making silicon steel and high silicon cast iron … Useful english dictionary
aluminum ferrosilicon — Смотри Ферросиликоалюминий … Энциклопедический словарь по металлургии