Question

Define roasting and calcination??

Answer 1

Authorities differ on the meaning of calcination (also referred to as calcining). ... However, calcination is also used to meana 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.


Roasting is a pyrochemical process in which the ore is heated in the presence of oxygen or air is below its melting point. ... roasting is done in reverberatory furnace.

Answer 2

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 .