Question

Difference between calcination and roasting.

Answer 1

Calcination is the process when a substance is heated without the presence of oxygen. This is used in the extraction carbonate ores of middle reactive metals.
Roasting is when a substance is heated in the presence of oxygen.T his is used in the extraction of sulphate ores of middle reactive metal

Hope this helps you.........

Answer 2

roasting is a pyrochemical process in which the ore is heated in the presence of oxygen air is blow is melting point

calcination is also a pyrochemical process in which the ore is heated in the absence of air.