The roasting of pyrites analyzing 85% FeS2 and 15% gangue utilizes 40% excess air (FeS2 to SO2) supplied at the rate of 358 m3 /hr at 23°C, 743 mm Hg and 88% RH. A partial analysis of the cinder...

The roasting of pyrites analyzing 85% FeS2 and 15% gangue utilizes 40% excess air (FeS2 to SO2) supplied at the rate of 358 m3 /hr at 23°C, 743 mm Hg and 88% RH. A partial analysis of the cinder showed 25.92% FeS2 and17.83% gangue. Only 65% of the FeS2 gasified is converted to SO2 and the rest to SO3 . Calculate the following per kg pyrite used:

Weight of 15% Oleum formed from 85% H2SO4, If all the SO2 reacts in the converter