In several other metallurgical processes like roasting (conversion of metal sulphide to oxide, reduction of oxides, oxidation of impurities etc,) air or pure oxygen is used. In all these cases it is often required to calculate stoichiometric amount of air. For example consider roasting of sulphide;
M stands for metal. In all the above equations the amount of air can be easily calculated following the stoichiometry of the reactions.
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