In metallurgy, what is the process of heating a sulfide ore strongly in the presence of excess air below its melting point called?

💡 Solution & Explanation

Roasting is the process of heating sulfide ores strongly in excess air to convert them into metal oxides and remove volatile impurities like sulfur dioxide. Calcination, unlike roasting, involves heating carbonate or hydrated ores in the absence or limited supply of air. Metallurgy extraction processes are standard topics in general science and chemistry modules.