Pyrite Fines containing 85% FeS2, and 15% gangue are charged to a burner. An analysis of the cinder shows 11.11% FeS2, 66.63 % Fe203, 2.67 % SO3 and 19.6% gangue. Air is supplied 17.33% in excess (FeS2 to SO3) at 250C, 740 mm Hg and 80% RH. If 8% of the SO3 formed is absorbed in the cinder, Answer the following questions: 1. How many moles of nitrogen is supplied? a.1.948 b. 2.656 c. 11.723 d. 3.1163 2. How many % excess oxygen (FeS2 to SO3) is supplied? a. 46.78% b. 59.97% c. 62.46% d. 56.38% 3. What % FeS2 from the Feed is lost in the cinder? a.10.00% b. 8.00% c. 12.00% d. none of the three

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