The GATE Grind

GATE 2023 MT – Question 16

Mineral Processing and Extractive Metallurgy · Non-ferrous extraction · 1 mark · Multiple choice

Among the following options, a process for liquid-liquid separation is

  1. Smelting
  2. Roasting
  3. Sintering
  4. Calcination

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Show answer and explanation

Correct answer: (A) Smelting

Explanation

Smelting creates immiscible molten phases, commonly metal/matte and slag, which separate by density. Roasting and calcination are mainly solid–gas thermal treatments, and sintering agglomerates solids.

Therefore **smelting, A** fits liquid–liquid separation.