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Energy-saving method for technogenic waste processing.

Bayandy Dikhanbaev1, Chandima Gomes2, Aristan Bayandievich Dikhanbaev1

  • 1Department of Heat and Power Energy, Kazakh AgroTechnical University, Astana, Kazakhstan.

Plos One
|December 28, 2017
PubMed
Summary
This summary is machine-generated.

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A novel smelting method using an inversion phase layer significantly improves zinc recovery from mining waste. This energy-efficient process reduces fuel consumption by up to four times compared to existing technologies.

Area of Science:

  • Metallurgical Engineering
  • Waste Management
  • Chemical Engineering

Background:

  • Vast amounts of technogenic waste from mining-metallurgical complexes pose environmental challenges.
  • Kazakhstan alone holds approximately 20 billion tons of such waste.
  • Current waste treatment methods lack profitability and efficiency.

Purpose of the Study:

  • To develop a new, energy-saving, and highly efficient melting technology for technogenic waste.
  • To introduce a novel smelting method: the smelt layer of inversion phase.
  • To assess the economic and environmental viability of the new method.

Main Methods:

  • Development of the smelt layer of inversion phase technology, combining ideal stirring and displacement regimes.
  • Affine modelling for scaling pilot plant results to industrial applications.

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  • Experimental comparison with bubbling and boiling smelt layers for zinc recovery.

    • Main Results:

    • The inversion phase layer method demonstrates increased zinc recovery compared to bubbling and boiling layers.
    • Reduced formation of zinc silicates and ferrites observed.
    • Natural gas consumption halved in pilot plant industrial samples versus fuming furnaces.
    • Specific fuel consumption reduced approximately fourfold compared to Waelz-kilns.

    Conclusions:

    • The smelt layer of inversion phase is a promising technology for profitable and efficient processing of mining waste.
    • Significant reductions in fuel consumption and improved zinc recovery are achievable.
    • This method offers a sustainable solution for managing large volumes of technogenic waste.