Pig iron is the product of smelting iron ore (also ilmenite) with a high-carbon fuel and reductant such as coke, usually with limestone as a flux. Charcoal and anthracite are also used as fuel and reductant. Pig iron has a very high carbon content, typically 3.8–4.7% along with silica and other constituents of dross, which makes it very brittle and not useful directly as a material except for limited applications.
Basic Pig Iron:
Used mainly in electric arc steelmaking
Foundry Pig Iron: [also known as haematite pig iron]:
Used in mainly in the manufacture of grey iron castings in cupola furnaces.
Nodular Pig Iron: [also known as nodular or spheroidal graphite – SG]:
Used in the manufacture of ductile iron castings.