In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:

gangue

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metallic calcium

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calcium carbonate

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slag

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Solution

The correct option is D
slag

$C a C O_{3} Δ - \to C a O + C O_{2}$

The coke further reacts with this carbon dioxide to form carbon monoxide:
$C O_{2} + C ⟶ 2 C O$

Reduction:
$F e_{2} O_{3} + 3 C ⟶ 2 F e + 2 C O$

The $C a O$ from the added limestome (calcium carbonate) reacts with silica forming slag:
$C a O + S i O_{2} ⟶ C a S i O_{3}$

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Similar questions

In the manufacture of iron, limestone is added in the blast furnace to form
A,,gangue
B,,slag
C,,calcium metal
D,,calcium carbonate

C a C O_{3}

_{3}

_{3}

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