2022-2023 Spring MEM2962 Principles of Extractive Metallurgy Assignment 1. Pig iron is obtained by charging ore, flax and coke into a blast furnace with the following compositions. The flux is in the ratio of 1/4 of the ore and assuming that 800kg of coke is used for the production of 1000kg of pig iron, and there is a Pco/PcO2=2 ratio in the flue gas. For the production of 1000kg. pig iron, calculate; a) Amount of ore used, b) Quantity and composition of the slag obtained; c) Required theoretical volume of air; d) Volume of flue gas obtained, e) Resulting flue gas composition. Fe:56, O:16, Si:28, Ca:40, C: 12,Al:27g/mol 2. A pig iron containing 0.1%S,0.3%Si,3.4%C,0.8%Mn, and 1.8%P is desulfurized at 1300C according to the following two reactions: 1. [S]lms+(CaO)(s)+[C]=(CaS)(s)+CO(g),G1=23,09025.14Tcal 2. [S]1w%+2(CaO)(s)+1/2[Si]=(CaS)(s)+1/2(2CaOSiO2)(s), G2=53.945+17.85Tcal Assuming that iron is saturated with carbon and all solid compounds are pure and pco=1atm, show that desulfurization is favored in the presence of silicon, given that, fS=3.6 and fsi=4.5. 3. When air blow is stopped in the Pierce-Smith converter at 1200C blister copper contains 1 wt\% oxygen. What is the residual sulfur in the blister if the partial pressure of SO2 in the melt is one atmosphere? The free energy changes for relevant reactions are given below: 21S2(g)+O2(g)=SO2(g),G1=60,870cal.O2(g)=2[%]Cu,G2=27,730cal.21S2(g)=[%SCu,G3=19,720cal