Question

Which of the following reactions occurs in the zone of heat absorption of the blast furnace in the metallurgy of iron?
A.\[{\text{C}}{{\text{O}}_2} + {\text{C}} \to 2{\text{CO }}\]
B.${\text{F}}{{\text{e}}_2}{{\text{O}}_3} + 3{\text{CO}} \to 2{\text{Fe}} + 3{\text{C}}{{\text{O}}_2}$
C.${\text{C}} + {{\text{O}}_2} \to {\text{C}}{{\text{O}}_2}$
D.${\text{FeO}} + {\text{Si}}{{\text{O}}_2} \to {\text{FeSi}}{{\text{O}}_3}$

Answer 1

Hint: The third and last phase in metallurgy is the extraction of iron from its ore. Metal extraction and isolation are accomplished in a few key phases.
-Ore concentration.
-Metal extraction from concentrated ore.
-The metal must be purified.

Complete answer: The goal of a Blast Furnace is to chemically convert the concentrated ore to a liquid metal state. A blast furnace is a massive, refractory-brick-lined steel stack where concentrated iron ore, coke, and limestone are dropped from the top and a blast of hot air is forced into the bottom. All three materials are crushed into little round bits, combined, and placed in a hopper that regulates the amount of input.
Coke is burnt in hot air pumped from the bottom, resulting in temperatures of around 2200K. The majority of the heat required for this process comes from burning coke. Coke combines with the oxygen in the heated air to generate carbon monoxide at such high temperatures (CO). The CO and heat are now moving upwards and colliding with the raw material falling from the top. The temperature in the top regions of the Blast Furnace is much lower than the 2200K temperature in the lower portions. Haematite (\[F{e_2}{O_3}\]) and Magnetite (\[F{e_3}{O_4}\]) are converted to Ferrous Oxide in this section (FeO).
The $C{O_2}$ ascending up is converted to CO with the absorption of heat in the heat absorption zone, at the middle section (temperature 1075K-1275).
${\text{C}}{{\text{O}}_2} + {\text{C}} \to 2{\text{CO}};\Delta {\text{H}} = 163kJ/mol$
Hence option A is correct.

Note:
${\text{C}} + {{\text{O}}_2} \to {\text{C}}{{\text{O}}_2}$ This reaction takes place in the zone of fusion.
 ${\text{F}}{{\text{e}}_2}{{\text{O}}_3} + {\text{CO}} \to 2{\text{Fe}} + 3{\text{C}}{{\text{O}}_2}$This takes place in zone of reduction.
Carbon appears to have a considerable impact on iron's brittleness and hardness balance. Pig iron is melted again using scraps of iron and coke and exposed to a blast of hot air to further decrease the carbon content. This type of iron is known as Cast Iron, and it has a somewhat lower carbon percentage of $2–3\%$. This is more difficult than pig iron.