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GATE 2019 MT – Question 36

Mineral Processing and Extractive Metallurgy · Primary and secondary steelmaking · 2 marks · Multiple choice

Match sites P blast-furnace runner, Q AOD, R torpedo car, S BOF with processes 1 decarburization, 2 external desulfurization, 3 dephosphorization, 4 external desiliconization.

  1. P–4, Q–1, R–2, S–3
  2. P–4, Q–2, R–3, S–1
  3. P–2, Q–1, R–4, S–3
  4. P–1, Q–3, R–2, S–4

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Show answer and explanation

Correct answer: (A) P–4, Q–1, R–2, S–3

Explanation

The runner can serve for external desiliconization, P–4. Argon–oxygen decarburization removes carbon while limiting chromium oxidation, Q–1. Torpedo-car hot-metal treatment includes external desulfurization, R–2. Basic oxygen refining can remove phosphorus into slag, S–3. The complete set is A.

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