Question

what is calcination and roasting.​

Answer 1

Calcination

is the reduction of carbonate ores into its oxides in presence of limited supply of O2

Roasting

Is the reduction of Sulphide ore into oxide in presence of abundant O2

Answer 2

Calcination:- In this process carbonates ores are heated alone in absence of air to obtain its oxide.

Roasting:- In this process sulphide ores are heated in excess of air to obtain its oxide.

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