Question

wht is difference between roasting and calcination

Answer 1

roasting is for sulphide ores in presence of abandon supply of air and calcination is heating of carbonate ores in limited supply of air

Answer 2

Explanation:

Roasting is the process in which used at the time of extraction of a metal from its sulfide ore. In this process, adequate amount of oxygen is supplied. This results in the formation of metal oxide with release of sulfur dioxide gas.

$2MS+3O_2\rightarrow 2MO+2SO_2$

Calcination is the process which is used at the time of extraction of a metal from its carbonate ore. In this process, limited amount of oxygen is supplied. This results in the formation of metal oxide with the release of carbon dioxide gas.

$MCO_3\rightarrow MO+CO_2$