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  1. how does the blast furnace maintain the heat ?
  2. what is the function of CaCO3 ?
  3. how the slag protect the molten iron ?
  4. why does iron flow down to the bottom /
  5. how does the slag and molten iron get seperated ?
  6. what is use of waste gas /
  7. what is main impurity of iron in blast furnace ?
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9y ago

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