Chapter 21 Chemistry of the Metals Mr. WatsonHST.

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Presentation transcript:

Chapter 21 Chemistry of the Metals Mr. WatsonHST

Mr. Watson

HST Mr. Watson Metallurgy the extraction of metals from ores the preparation of metals for use the study of the relationship between structures and properties of metals

HST Mr. Watson Metallurgy Pretreatment of Ore Concentration Roasting

HST Mr. Watson

HST Mr. Watson Pretreatment of Ore crude ore is crushed

HST Mr. Watson Concentration floatation

HST Mr. Watson Roasting converting sulfide ore to oxide 2ZnS (s) + 3O 2(g) -----> 2ZnO (s) + 2SO 2(g) 2CuS (s) + 3O 2(g) -----> 2CuO (s) + 2SO 2(g) 3FeS 2(s) + 8O 2(g) -----> Fe 3 O 4(s) + 6SO 2(g)

HST Mr. Watson Manufacture of Iron and Steel Chemistry of blast furnace Chemistry of basic oxygen furnace

HST Mr. Watson Chemistry of blast furnace iron reduction raw materials

HST Mr. Watson Several Blast Furnaces

HST Mr. Watson Liquid Iron Pour

HST Mr. Watson Fe (l) & Slag (l) Pours

HST Mr. Watson

HST Mr. Watson Chemistry of blast furnace raw materials: iron ore limestone or lime coke

HST Mr. Watson Chemistry of blast furnace iron ore => source of iron Fe 2 O 3, Fe 3 O 4, FeO, SiO 2

HST Mr. Watson Chemistry of blast furnace limestone or lime => flux to remove impurities CaCO 3 or CaO

HST Mr. Watson Chemistry of blast furnace coke => reducing agent C

HST Mr. Watson Chemistry of blast furnace C (s) + O 2(g) -----> CO 2(g) coke air

HST Mr. Watson Chemistry of blast furnace CO 2 + C ---> 2 CO coke

HST Mr. Watson Chemistry of blast furnace 3 Fe 2 O 3(s) + CO (g) -----> 2Fe 3 O 4(s) + CO 2(g) iron ore

HST Mr. Watson Chemistry of blast furnace Fe 3 O 4(s) + CO (g) -----> 3FeO (s) + CO 2(g) iron ore

HST Mr. Watson Chemistry of blast furnace FeO (s) + CO (g) -----> Fe (l) + CO 2(g) iron ore pig iron

HST Mr. Watson Chemistry of blast furnace CaCO 3(s) + heat -----> CaO (s) + CO 2(g) limestone lime

HST Mr. Watson Chemistry of blast furnace CaO (s) + SiO 2(s) -----> CaSiO 3(l) limesandslag

HST Mr. Watson Purification of Metals Distillation Electrolysis Chemical Reactions

HST Mr. Watson Distillation mercury

HST Mr. Watson Electrolysis Copper Aluminum Sodium

HST Mr. Watson Production of Copper Cu 2 S (l) + O 2(g) -----> 2 Cu (l) + SO 2(g) Cu (s) ----->Cu (s) impure electrolysispure

HST Mr. Watson Electrolysis of molten salt 2 NaCl (l)  2 Na (l) + Cl 2(g)

HST Mr. Watson Chemistry of Basic Oxygen Furnace iron purification steel making raw materials

HST Mr. Watson Chemistry of Basic Oxygen Furnace raw materials pig iron from blast furnace fluxing agent to remove impuritites alloying agents

HST Mr. Watson

HST Mr. Watson Chemistry of Basic Oxygen Furnace Removal of excess of carbon C (s) + O 2(g) -----> CO 2(g) impurity air in pig iron

HST Mr. Watson

HST Mr. Watson Chemistry of Electric Furnace raw materials scrap iron fluxing agent to remove impuritites alloying agents