Question

During the extraction of haematite limestone is added which acts as

• A. Flux
• B. Slag
• C. Reducing agent
• D. Gangue

Answer 1

Answer: (A)

Flux

Answer 2

$\mathrm { CaCO } _ { 3 }$ is added as flux. It decomposes to give CaO which reacts with $\mathrm { SiO } _ { 2 }$ to form slag.

$\mathrm { CaCO } _ { 3 } \rightarrow \mathrm { CaO } + \mathrm { CO } _ { 2 }$

$\underset { \text { flux } } { \mathrm { CaO } } + \underset { \text { Gangue } } { \mathrm { SiO } _ { 2 } } \rightarrow \underset { \text { Slag } } { \mathrm { CaSiO } _ { 3 } }$