Question

What is meant by Roasting and Calcination...??​

Answer 1

Answer:

1. Roasting : It is the process of converting an ores to oxide by strongly heating it in the presence of excess of air . ...
2. Calcination : It is the process of converting an ores to oxide by strongly heating it in limited air . For example carbonate ores are converted into the oxide by heating in the absence of air.

Answer 2

The sulphide ores are converted into oxides by heating strongly in the presence of excess air.This process is called calcination.

The carbonate ores are changed into oxides by heating strongly in limited air.This process is called roasting.

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