The metallic stage of iron in a furnace consisting of more than 80% iron is called Pig Iron. The term ‘Pig Iron’ is coined from the traditional way of casting iron into moulds in a blast furnace. In sand bed, these moulds are arranged so that a single runner can feed them all. As the moulds group looks like suckling pigs, each iron piece was start to known as pigs. Today, pig casting machine is used to produce this iron.
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