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Recovery of aluminum from industrial and electronic waste via melting with salt flux - PowerPoint PPT Presentation


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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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slide1

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

slide4

Energyconsumption

Aluminumrecyclingallowstoobtain a 95 % save of theenergyconsumed in aluminumprimaryproduction

slide5

KCl – NaCl SYSTEM

Liquid

Eutectic Point

Temperature [ºC]

Concentration [mol %]

slide11

Aluminumdrosscharacterization

Aluminum

Oxygen

Magnesium

slide16

Aluminumswarfmeltingapplyingagitation

Agitationapplyedusing a woodenrod

Agitationapplyedusing a stainlesssteelrod

slide17

Aluminumswarfmeltingprocess

Extrusionswarf

Profilecuttingswarf

slide22

CONCLUSIONS

  • Aluminumwastes,
  • (electronic and industrial)
  • Meltingprocessallowstoobtain a productwith a concentration of Al > 99 %.
  • Thisproductmeetsmarketrequirements.
slide23

CONCLUSIONS

  • Usingsalt flux thatcontains mixtures of KCl and NaClduringthemeltingprocess, preventstheoxidation of the material and, in the case of thedross, thesalt flux allowstoremovethespinellayer.
slide24

CONCLUSIONS

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