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Related Experiment Videos

Prioritising objectives for waste reprocessing: a case study in secondary lead refining.

A E Lewis1, C Beautement

  • 1Department of Chemical Engineering, University of Cape Town, South Africa. alison@chemeng.uct.ac.za

Waste Management (New York, N.Y.)
|September 7, 2002
PubMed
Summary

This study focused on improving secondary lead refining by characterizing slag, minimizing waste, and identifying treatment methods. Process improvements reduced slag volume and lead loss, leading to environmentally benign waste.

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Area of Science:

  • Metallurgical Engineering
  • Environmental Science
  • Waste Management

Background:

  • Secondary lead refining generates sulphidic slag containing lead.
  • Initial goals were lead recovery and slag detoxification.
  • Project refocused on clean production principles.

Purpose of the Study:

  • Characterize waste slag for process understanding.
  • Minimize slag production and lead loss through process improvement.
  • Modify slag properties to meet environmental regulations and identify treatment methods.

Main Methods:

  • Waste characterization to identify process deficiencies.
  • Process improvements to reduce slag quantity and lead content.
  • Slag modification based on characterization and regulations.

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  • Identification of slag treatment technologies.

    • Main Results:

    • Waste characterization provided insights into process inefficiencies.
    • Process modifications successfully reduced slag volume and lead loss.
    • Slag properties were adapted to comply with environmental standards.
    • Viable treatment methods for the slag were identified.

    Conclusions:

    • A clean production approach is effective for secondary lead refining.
    • Waste characterization and process optimization are key to minimizing environmental impact.
    • The study successfully addressed lead recovery and slag management challenges.