The GATE Grind

GATE 2019 MT – Question 37

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

Match techniques P aluminium wire feeding, Q calcium treatment, R argon rinsing, S lime-powder injection with objectives 1 inclusion modification, 2 liquid-steel mixing, 3 desulfurization, 4 deoxidation.

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

Practise this question in The GATE Grind →

Show answer and explanation

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

Explanation

Aluminium binds dissolved oxygen, P–4. Calcium modifies oxide/sulfide inclusions, Q–1. Argon bubbles stir the melt, R–2. Lime provides a basic reagent for sulfur removal, S–3. Hence D. Each pairing specifies the principal intended purpose of that treatment.

More Primary and secondary steelmaking questions

All Primary and secondary steelmaking questions →