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Zn and Pb

Zn and Pb. Zn and Pb. Zn and Pb. Zn and Pb. Al & Mg.

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Zn and Pb

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  1. Zn and Pb

  2. Zn and Pb

  3. Zn and Pb

  4. Zn and Pb

  5. Al & Mg a) Carbon anode; b) Electrolyte; c)Insulation; d) Carbon lining; e) Current collector bar; f) Thermal insulation; g) Steel shell; h) Carbon block; i) Ledge; j) Crust; k) Alumina cover; l) Removable covers; m) Anode rods; n) Fume collection; o) Air cylinder; p) Feeder; q) Current supply; r) Crust breaker

  6. Al …………b.v 1950oC Al2O3………b.t. 2050oC Na3AlF6….. b.t. 1010oC Composition of electrolyte: 5-10% Al2O3 cryolit, AlF3, CaF2,,,LiF – 970 oC 2,1 g/cm3 (Al 2,7 g/cm3 ) Dissociation: Al2O3→ Al 3+ + AlO33- Cathode: Al 3+ + 3 e → Al (l) Anode: 2 AlO33- - 6 e → Al2O3 + 1,5 O2 1,5 O2 + C → 3 CO (CO2) 4F- + C - 4 e → CF4

  7. Al & Mg

  8. Cu

  9. Ni

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