Question

distinguished Between roasting and calcinations which of these two ia used for sulphide ores and why

Answer 1

Calcination is a process in which the ores are heated below its melting point in the absence of air. Volatile impurities like arsenic are removed by this process. Roasting is the method used for sulphide ores. Roasting is used because it is easier to purify the oxides of a substance than the other ores. Roasting is done in the presence of air.

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