Question

In blast furnace, the highest temperature is in

• A. reduction zone
• B. slag zone
• C. fusion zone
• D. combustion zone

Answer 1

Answer: (D)

In blast furnace the highest temperature is in combustion zone. In the first stage, coke burns to produce $C{O}_2$ which rises temperature.
$C+O_2\to C{O}_2+$ Heat
This reaction is exothermic and hence temperature is $2170K$. It is known as combustion zone.