Describe the extraction of iron from one its ore

Extraction of iron from hematite,Fe₂O₃

Main Impurities

Silica, SiO₂

Alumina, Al₂O₃

 Procedure

Iron ore, lime stone and coke in the correct proportions are reacted with

Preheated air in a blast  furnace.

Reactions leading to reduction of iron oxide are

C (s) + O₂ (g)  →CO₂ (g)

CO₂ (s) + C (s)  →2CO (g)

Fe₂O₃ (s) + 3CO (g) → 2Fe (s) + 3CO₂ (g)

Reactions leading to removal of impurities

CaCO₃ (s) → CaO (s) + CO₂ (g)

CaO (s) + SiO₂ (s)  → CaSiO₃ (l) slag

CaO (s) + Al₂O₃ (s)  → CaSiO₃ (l)  slag

Molten iron and slag percolate to the bottom of the furnace and taped of through different taps.

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