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Question
What type of ores are usually calcined?
Short Answer
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Solution
Ores that are usually calcined are carbonate ores. During calcination, these ores are heated in limited air below their melting points, causing carbonates to decompose into oxides, releasing carbon dioxide, and removing moisture and volatile impurities. For example, limestone (CaCO3) is calcined to lime (CaO) and CO2.
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