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GATE 2022 MT – Question 25

Mineral Processing and Extractive Metallurgy · Ironmaking · 1 mark · Multiple choice

Which one of the following modern practices is used for retarding the solution loss reaction in blast furnace ironmaking?

  1. High top pressure
  2. Bell-less top
  3. Pulverized coal injection
  4. Rotating chute for burden distribution

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Show answer and explanation

Correct answer: (A) High top pressure

Explanation

The solution-loss reaction is $C+CO_2\rightleftharpoons2CO$. Higher pressure favours the side with fewer gas molecules, shifting it toward carbon and carbon dioxide. This retards coke consumption. Answer: **high top pressure, A**.