differentiate between roasting and calcination process in Metallurgy long answer
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Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc.
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Answer:
Roasting
Heating strongly sulphide ores in the presence of excess to convert into oxides.
Calcination
heating strongly carbonate strongly in the presence of limited air
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