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Question

What is the iron obtained from the blast furnace called?


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Solution

Blast furnace:

  • In the blast furnace, the reduction of iron oxides takes place at different temperature ranges.
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Iron obtained from blast furnace:

  • “The ironFe obtained from blast furnace contains about 4% carbon and many impurities in smaller amounts (e.g., SulfurS, PhosphorusP, SiliconSi , and ManganeseMn). This is known as pig iron and cast into a variety of shapes.”
  • Pig iron is different from cast iron in many ways that are discussed below:
  • Cast iron is made by melting pig iron in presence of scrap iron and coke in the hot air blast.
  • Cast iron has a lower carbon content than pig iron and it is extremely brittle as well as hard in nature.

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