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Chapter 21

Chapter 21. Chemistry of the Metals. Metallurgy. the extraction of metals from ores the preparation of metals for use the study of the relationship between structures and properties of metals. Metallurgy. Pretreatment of Ore Concentration Roasting. Pretreatment of Ore.

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Chapter 21

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  1. Chapter 21 Chemistry of the Metals Dr. S. M. Condren

  2. Dr. S. M. Condren

  3. Metallurgy • the extraction of metals from ores • the preparation of metals for use • the study of the relationship between structures and properties of metals Dr. S. M. Condren

  4. Metallurgy • Pretreatment of Ore • Concentration • Roasting Dr. S. M. Condren

  5. Dr. S. M. Condren

  6. Pretreatment of Ore • crude ore is crushed Dr. S. M. Condren

  7. Concentration • floatation Dr. S. M. Condren

  8. Roasting • converting sulfide ore to oxide 2ZnS(s) + 3O2(g) -----> 2ZnO(s) + 2SO2(g) 2CuS(s) + 3O2(g) -----> 2CuO(s) + 2SO2(g) 3FeS2(s) + 8O2(g) -----> Fe3O4(s) + 6SO2(g) Dr. S. M. Condren

  9. Manufacture of Iron and Steel • Chemistry of blast furnace • Chemistry of basic oxygen furnace Dr. S. M. Condren

  10. Chemistry of blast furnace iron reduction raw materials Dr. S. M. Condren

  11. Several Blast Furnaces Dr. S. M. Condren

  12. Liquid Iron Pour Dr. S. M. Condren

  13. Fe(l) & Slag(l) Pours Dr. S. M. Condren

  14. Dr. S. M. Condren

  15. Chemistry of blast furnace raw materials: iron ore limestone or lime coke Dr. S. M. Condren

  16. Chemistry of blast furnace iron ore => source of iron Fe2O3, Fe3O4, FeO, SiO2 Dr. S. M. Condren

  17. Chemistry of blast furnace limestone or lime => flux to remove impurities CaCO3 or CaO Dr. S. M. Condren

  18. Chemistry of blast furnace coke => reducing agent C Dr. S. M. Condren

  19. Chemistry of blast furnace C(s) + O2(g) -----> CO2(g) coke air Dr. S. M. Condren

  20. Chemistry of blast furnace CO2 + C ---> 2 CO coke Dr. S. M. Condren

  21. Chemistry of blast furnace 3 Fe2O3(s) + CO(g) -----> 2Fe3O4(s) + CO2(g) iron ore Dr. S. M. Condren

  22. Chemistry of blast furnace Fe3O4(s) + CO(g) -----> 3FeO(s) + CO2(g) iron ore Dr. S. M. Condren

  23. Chemistry of blast furnace FeO(s) + CO(g) -----> Fe(l) + CO2(g) iron ore pig iron Dr. S. M. Condren

  24. Chemistry of blast furnace CaCO3(s) + heat -----> CaO(s) + CO2(g) limestone lime Dr. S. M. Condren

  25. Chemistry of blast furnace CaO(s) + SiO2(s) -----> CaSiO3(l) lime sand slag Dr. S. M. Condren

  26. Purification of Metals • Distillation • Electrolysis • Chemical Reactions Dr. S. M. Condren

  27. Distillation • mercury Dr. S. M. Condren

  28. Electrolysis • Copper • Aluminum • Sodium Dr. S. M. Condren

  29. Production of Copper Cu2S(l) + O2(g) -----> 2 Cu(l) + SO2(g) Cu(s) -----> Cu(s) impure electrolysis pure Dr. S. M. Condren

  30. Electrolysis of molten salt 2 NaCl(l) 2 Na(l) + Cl2(g) Dr. S. M. Condren

  31. Chemistry of Basic Oxygen Furnace iron purification steel making raw materials Dr. S. M. Condren

  32. Chemistry of Basic Oxygen Furnace raw materials pig iron from blast furnace fluxing agent to remove impuritites alloying agents Dr. S. M. Condren

  33. Dr. S. M. Condren

  34. Chemistry of Basic Oxygen Furnace Removal of excess of carbon C(s) + O2(g) -----> CO2(g) impurity air in pig iron Dr. S. M. Condren

  35. Dr. S. M. Condren

  36. Chemistry of Electric Furnace raw materials scrap iron fluxing agent to remove impuritites alloying agents Dr. S. M. Condren

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