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Thermal Separation and Leaching of Valuable Elements from Waste-Derived Ashes

  • Daniel LindbergEmail author
  • Emil Vainio
  • Patrik Yrjas
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Recovery of trace elements from different industrial waste streams is important in realizing the goals of the circular economy. Ash streams from waste combustion can contain high levels of both toxic and valuable trace elements. These elements can be separated during the combustion process based on volatilization and condensation, as well as being separated in post-combustion processes, through thermal or leaching treatment. In this study, an overview is given of the thermal methods for recovery of valuable elements from ash fractions derived from waste incineration. In addition, a case study is presented of the behaviour of ash-forming elements in combustion of MSW and demolition wood, with special focus on the elements Co, Cu, and Sb. In conclusion, it is shown that thermodynamic modeling of high temperature processes can be a useful tool to predict ash behavior both during combustion and in the post combustion treatment of the ash.

Keywords

Ash treatment Thermodynamic modeling Waste incineration Thermal processing 

Notes

Acknowledgements

The study was performed within the ARVI-Material Value Chains Research Program, coordinated by CLIC Innovation Oy and financed by Tekes – the Finnish Funding Agency for Innovation.

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.Johan Gadolin Process Chemistry Centre, Åbo Akademi UniversityÅbo/TurkuFinland

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