|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deriving Value from Challenging Waste Streams: Recycling and Sustainability Joint Session
||Thermal Separation and Leaching of Valuable Elements from Waste-derived Ashes
||Daniel Lindberg, Emil Vainio, Patrik Yrjas
|On-Site Speaker (Planned)
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 and continuous leaching can be useful tools to predict ash behavior both during combustion and in the post combustion treatment of the ash.