
92 Aluminum Recycling
loss. As a result, current decoating strategy relies on prolonged exposure at a lower
temperature (480°C–520°C), which minimizes metal oxidation. However, this can
also result in incomplete decoating, leaving behind unoxidized char (Stevens and
Tremblay, 1997).
For scrap with low organic content, decoating in the preheating cham-
ber of a twin-chamber melting furnace is effective and eliminates the need
for a separate unit (Evans and Guest, 2000). This will be further described
100.00 200.00 300.00 400.00 500.00 600.00
0
99.50
99.00
0
5.00
0.00
–5.00
Start
1 min 2 min
1 min
2 min
3 min
End
FIGUR ...