Evaluate the following statements regarding Calcination and Roasting. Which one accurately different — Metallurgy and Isolation of Elements Chemistry Question
Question
Evaluate the following statements regarding Calcination and Roasting. Which one accurately differentiates the two pyrometallurgical pre-treatments?
Answer: C
💡 Solution & Explanation
Calcination involves heating the ore below its melting point in the absence of air to remove moisture and $CO_2$ (endothermic). Roasting involves heating the ore in excess air to convert sulphides to oxides and remove volatile impurities like $SO_2$ (exothermic). Neither process melts the ore.
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