Distinguish between Toasting and Calcination
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Difference between Roasting and Calcination. 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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● ROASTING - The sulphide ores are converted into oxides by heating strongly in the presence of excess air .
● CALCINATION - The carbonate ores are changed into oxides by heating strongly in limited air .
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