what is its uses?
To reduce metals from their oxides and to deoxidize steel and other ferrous alloys.
Ferrosilicon
Ferrosilicon is used as a source of silicon to reduce metals from their oxides and to deoxidize steel and other ferrous alloys. 
what is earth? Third planet from the Sun what is its shape? Nearly spherical when did its formation start? Ga ago what is its chemical composition? Iron, oxygen, silicon, magnesium, sulphur, nickel, calcium, and aluminum, and trace amounts of other elements. when was the third mentioned composition discovered? 1787 what is its crystal structure? Crystallises in a giant covalent structure at standard conditions, specifically in a diamond cubic lattice. what are its alloys? Ferrosilicon or silicocalcium and aluminium-silicon (silumin) what is the production like of the former mentioned alloy? Reduction of silica or sand with coke in the presence of iron.
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Ferrosilicon [SEP] Uses
Ferrosilicon 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"); ferromanganese, spiegeleisen, calcium silicides, 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 steel for electromotors and transformer cores. In the 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.