Shredder Residue Composition and Separation

1
Waste Energy Research Group -
Led by Dr. Mari Harder
WERG
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Funded through the Landfill Tax Credit Scheme
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End-of-Life Vehicles (1.8Mt)
Recycling rates (iron/steel) 68-74 by weight
EU Directive proposals 85 by weight by
2006 95 by weight by 2015
1.8 million each year in the UK
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Typical UK Shredder Feed
Domestic Goods
20
ELVs
40
Light Iron
40
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ELV Shredding Operation
trommel
25 Out Shredder Residue or fluff to landfill
air classifier
shredder
magnetic separator
In feedstock
ferrous product
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SHREDDER FRACTIONS
OVERSIZE (gt130mm) (10)
FINES (lt15mm) (40)
MIDDLE (15130mm) (50)
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Shredder Residue (100)
Fines lt15mm
Fraction 15-130mm
Oversized gt130mm
Middle Fraction (505) (separation)
?
?
?
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OVERSIZE Stream (gt130mm)
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Volume Percentage of OVERSIZE Stream
10
Shredder Residue (100)
Fines (405)
Middle Fraction (505)
Oversized (105)
Oversized (105)
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MIDDLE Stream 15130mm
12
Shredder Residue (100)
Oversized (105)
Fines (405)
Middle Fraction (505)
Polyolefins 1.3
Other Plastic 0.7
Miscellaneous 0.7
Foam 1.0
Metal 2.0
Textiles 0.7
Tyre 3.0
Wire 0.6
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Polymers in Middle Stream
Floats (2.5 of SR)
Sinks (13.5 of SR)
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FINES Stream lt15mm
15
Shredder Residue (100)
Oversized (105)
Fines (405)
Polyolefins 1.3
Other Plastic 0.7
?
Miscellaneous 0.7
Foam 1.0
Metal 2.0
Textiles 0.7
Tyre 3.0
Wire 0.6
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Pyrolysis of ASR
Funded through the Landfill Tax Credit Scheme
WERG
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Pyrolysis Unit (schematic)




Flue Gas Exhaust
Thermocouple


Chain drive
Combustion chamber


Gas fired furnace
Gas fired furnace
and Bag Filters






Feed
S.R. plug





Char and metals


700C

700C

Condenser

BURNER
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Process 1
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Process 2
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Process 2 (cont)
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Shredder Residue (100) (divide by 4 for ELV)
Oversized (105)
Fines (405)
Middle Fraction (505)
Polyolefins 1.3
Other Plastic 0.7
Miscellaneous 0.7
Foam 1.0
Metal 2.0
Textiles 0.7
Tyre 3.0
Wire 0.6
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Recoverable Materials from Pyrolysis of
SR (divide by 8 for ELV )
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Project Findings
Residence time is reasonable for commercial
consideration.
Recovery of significant amounts of metals is
possible.
Metal recovery is very dependent on the
post-pyrolysis process used.
Concentrations of lead are unexpectedly high.
WERG
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Waste Energy Research Group -
Led by Dr. Mari Harder
WERG
25
Material Composition of a Typical Car
ACCORD 2000