Question

Match the zones of blast furnace used in refining of iron with the respective reaction happening in them.

• A. $F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$
• B. $CaO+Si{O}_2\to CaSi{O}_3$
• C. $C+O_2\to C{O}_2$

Answer 1

A blast furnace is a gigantic, steel stack lined with refractory brick where the concentrated iron ore, coke, and limestone are dumped from the top, and a blast of hot air is blown from the bottom. This process is widely used in the manufacturing of iron.

Zone of reduction $(300°C)$:

$F{e}_2{O}_3+3CO\to 2Fe+3C{O}_2$

Zone of slag formation $(1900°C)$:

$C{O}_2+C\to 2\mathrm{CO}CaC{O}_3\to \mathrm{CaO}+{\mathrm{CO}}_{2}CaO+Si{O}_2\to CaSi{O}_3\left(slag\right)$

Zone of combustion $(1200°-1400°C)$:

$C+O_2\to C{O}_2$