Magnetite (Fe3O4, 72.4% Fe)
Hematite (Fe2O3, 69.9% Fe)
Fed directly into iron-making blast furnaces.
Iron ore is the raw material used to make pig iron,
An intermediate product obtained by smelting iron ore in a blast furnace with a high-carbon fuel and reductant such as coke, usually with limestone as a flux.
Pig iron contains at least 92% Fe and has a very high carbon content, typically 3.5 – 4.5%
Pig iron is supplied in a variety of ingot sizes and weights, ranging from 3 kg up to more than 50 kg.
Merchant pig iron is produced by dedicated merchant plants & integrated steel mills
Types of merchant pig iron
1. Basic pig iron: used mainly in electric arc steelmaking
2. Foundry pig iron (also known as haematite pig iron): used mainly in the manufacture of grey iron castings in cupola furnaces
3. High purity pig iron (also known as nodular pig iron): used in the manufacture of ductile [also known as nodular or spheroidal graphite – SG] iron castings.
There are also various sub-types, for example low manganese basic pig iron, semi-nodular pig iron