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Recovery of aluminum from industrial and electronic waste via melting with salt flux

ESCUELA POLITÉCNICA NACIONAL Quito - Ecuador. Facultad de Ing . Química y Agroindustria Departamento de Metalurgia Extractiva. Recovery of aluminum from industrial and electronic waste via melting with salt flux. Ernesto de la Torre, Santiago Yépez, Alicia Guevara.

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Recovery of aluminum from industrial and electronic waste via melting with salt flux

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  1. ESCUELA POLITÉCNICA NACIONAL Quito - Ecuador Facultad de Ing. Química y Agroindustria Departamento de MetalurgiaExtractiva Recovery of aluminumfrom industrial and electronicwasteviameltingwithsalt flux Ernesto de la Torre, Santiago Yépez, Alicia Guevara

  2. Aluminumproductionfrombauxite

  3. Aluminumrecycling

  4. Energyconsumption Aluminumrecyclingallowstoobtain a 95 % save of theenergyconsumed in aluminumprimaryproduction

  5. KCl – NaCl SYSTEM Liquid Eutectic Point Temperature [ºC] Concentration [mol %]

  6. KCl – NaCl – NaFSystem

  7. Meltingmechanism

  8. Aluminum industrial and electronicwastes

  9. Experimental procedure

  10. Chemicalcharacterization of aluminumwastes

  11. Aluminumdrosscharacterization Aluminum Oxygen Magnesium

  12. Aluminumdross

  13. Aluminumwastesmeltingwithoutsalt flux

  14. Aluminumwastesmeltingusingsalt flux

  15. Aluminumwastesmeltingusingdifferentchlorides

  16. Aluminumswarfmeltingapplyingagitation Agitationapplyedusing a woodenrod Agitationapplyedusing a stainlesssteelrod

  17. Aluminumswarfmeltingprocess Extrusionswarf Profilecuttingswarf

  18. HeatSinksmeltingprocess

  19. Aluminumdrossmeltingprocess

  20. Influence of fluoridesadditiontothesalt flux

  21. AluminumQualityanalysis

  22. CONCLUSIONS • Aluminumwastes, • (electronic and industrial) • Meltingprocessallowstoobtain a productwith a concentration of Al > 99 %. • Thisproductmeetsmarketrequirements.

  23. CONCLUSIONS • Usingsalt flux thatcontains mixtures of KCl and NaClduringthemeltingprocess, preventstheoxidation of the material and, in the case of thedross, thesalt flux allowstoremovethespinellayer.

  24. CONCLUSIONS • Fluoridesaddition causes thatthealuminumyielddecreases. • Duetoanincrease in themeltingtemperature of thesalt mixture.

  25. ESCUELA POLITÉCNICA NACIONAL Quito - Ecuador Facultad de Ing. Química y Agroindustria Departamento de Metalurgia Extractiva Recovery of aluminumfrom industrial and electronicwasteviameltingwithsalt flux Ernesto de la Torre , Santiago Yépez, Alicia Guevara

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