Which flux is used in the extraction of iron | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In the blast furnace,hematite $(Fe_2O_3)$ is reduced to iron. The ore often contains silica $(SiO_2)$ as an impurity (gangue). To remove this acid

Vedclass · Accepted Answer

Limestone

Vedclass · Answer

(B) In the blast furnace,hematite $(Fe_2O_3)$ is reduced to iron. The ore often contains silica $(SiO_2)$ as an impurity (gangue). To remove this acidic impurity,limestone $(CaCO_3)$ is added as a flux. At high temperatures,limestone decomposes to form calcium oxide $(CaO)$,which acts as a basic flux: $CaCO_3 \rightarrow CaO + CO_2$ Then,$CaO$ reacts with the silica impurity to form calcium silicate slag $(CaSiO_3)$: $CaO + SiO_2 \rightarrow CaSiO_3$ Thus,the correct flux used is limestone.

Which flux is used in the extraction of iron from hematite in a blast furnace?

Similar Questions

Why is sulphide ore of copper heated in a furnace after mixing with silica?

The temperature at which carbon reduces $FeO$ into iron and produces $CO$ is:

In the aluminothermite process,aluminium acts as:

Which metal is added to recover $Au$ from $[Au(CN)_2]^-$?

Which methods are used for the extraction of $Pb$ and $Sn$ from their respective ores?

Vedclass Test Series

Exam Paper Generator

Online Exam Module