Question

what is calcination and roasting

Answer 1

Calcination is the process of conversion of metals into their oxides at high temperature in the absence of air.This is used for carbonate ores.
Roasting is the process of conversion of metals into their oxides in presence of air.This is used for sulphide ores.
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Answer 2

Roasting is a pyrochemical process in which the ore is heated with the presence of oxygen or air is below its melting point.It is used in metal oxide and sulphide ore.



Calcination is used to mean a thermal treatment process in the absence or limited supply of air or oxygen applied to ores and other solid materials to bring about a thermal decomposition.It is used in gypsum.


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