reduction smelting
Post on 21-Jun-2015
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Reduction Smelting
•∆H (y-int), ∆S (slope)•Oxide formers (Cu, Al) ∆Go , PO2 • Thermal decomposition Noble metals•CO2 vs CO•Reduction with C ∆Go , PCO /PCO2 •Minimum reduction temperature Point of intersection CO/CO2 line below Pb→PbO•Metallothermic reduction Si + 2FeO = 2Fe + SiO2•Volatile metal Zn (Pzn = 1 atm) Effect of Pzn on reaction temp•H2 vs CO•Second reaction Boudard reaction (CO2 + C = 2CO)
•Plot for MeO + CO = MeO + CO •Two simultaneous reactions MeO reduction + Boudard reaction•SnO2 reduction > 600 C Low temp CO2 stable than CO Eqlbm gas comp at intersection Gas comp above 600 dictated by reaction with faster kinetics.
Imperial Smelting Furnace
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