What is the slag formed during the extraction | vedclass

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(C) Iron is extracted from its ore,haematite $(Fe_2O_3)$,in a blast furnace. The ore is fed into the top of the furnace along with coke and limestone.

Vedclass · Accepted Answer

$CaSiO_3$

Vedclass · Answer

(C) Iron is extracted from its ore,haematite $(Fe_2O_3)$,in a blast furnace. The ore is fed into the top of the furnace along with coke and limestone.Carbon monoxide acts as a reducing agent during the reaction in the blast furnace,and limestone $(CaCO_3)$ decomposes in the hot furnace to form calcium oxide $(CaO)$.Calcium oxide reacts with the silica $(SiO_2)$ impurity present in the ore to form a molten slag.The chemical reaction is:$CaO + SiO_2 \longrightarrow CaSiO_3$Thus,the slag formed is calcium silicate $(CaSiO_3)$.

What is the slag formed during the extraction of iron?

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