In the burning of pyrite containing 92% FeS2 and 8% gangue, 13% of the FeS2 charged is lost in the cinder. A partial analysis of the cinder also shows 5.31% SO3. The Orsat analysis of the burner gas shows 6.75% SO2, 6.88% O2 and 86.38% N2. Air supplied is at 230C, 743 mmHg and 88% RH. Calculate: a. % excess air (FeS2 to SO2) b. % excess air ( FeS2 to SO3) c. m3 air/ kg pyrite d. m3 burner gas (2500C, 750 mmHg) / kg pyrite

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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In the burning of pyrite containing 92% FeS2 and 8% gangue, 13% of the FeS2 charged
is lost in the cinder. A partial analysis of the cinder also shows 5.31% SO3. The Orsat
analysis of the burner gas shows 6.75% SO2, 6.88% O2 and 86.38% N2. Air supplied is at
230C, 743 mmHg and 88% RH. Calculate:
a. % excess air (FeS2 to SO2)
b. % excess air ( FeS2 to SO3)
c. m3 air/ kg pyrite
d. m3 burner gas (2500C, 750 mmHg) / kg pyrite

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