Characterisation of rotary kiln residues from the pyrolysis of shredder wastes. Osric Tening Forton Marie K. Harder Norman R. Moles. Waste & Energy Research Group. Faculty of Science and Engineering. University of Brighton, UK. Presentation Outline.
Osric Tening Forton
Marie K. Harder
Norman R. Moles
Waste & Energy Research Group. Faculty of Science and Engineering. University of Brighton, UK
Presentation Outline of shredder wastes
Waste characteristics & recovery options of shredder wastes
MIDDLES (15 – 130mm)
Presence of residual metals and contaminants -
Cu, Zn and Fe – potential for further recovery from residues?
Pb – major contaminant and limiting factor for reuse options
Evaluate/Use the performance of a mechanical roll crushing process to fractionate metals for recovery and disposal
Limited attentionAims and Objectives
Gas fired furnace
and Bag Filters
Char and metals
Experimental Design & feed characteristics
Kiln type – MRP Rotary Kiln Unit
Screening & sieving
Chemical AnalysesScreening, roll crushing schematic 1
Screening & sieving
Chemical AnalysesScreening, roll crushing schematic 2
-Average Carbon Content (LOI @ 550oC)
- ASR – 17%
- SR – 23%
-largest proportion of residues in
-changes in aspect ratio
Pyrolysis (commercial) is useful for material recovery towards ELV Directive targets
Inerts contain useful metals (Cu, Zn, Fe) and contaminants (Pb)
Lead levels in SR residues are ~double ASR residues
Implications for sustainable waste management?
Implications for automotive industry?
Mechanical roll crushing and separation concentrates metals and contaminants into some fractions.
leaves most of the inerts less contaminated – reusable?
Pb concentration for re use or disposal
Possible Fe, Zn and Cu recovery for secondary markets
Value from shredder wastes pyrolytic solid residues
Suitable markets with product specifications must be identified
Collation of larger datasets for more rigorous statistical analysesConclusions