
72 Aluminum Recycling
All shredders generate dust and ne particles during operation. These would be
an environmental and workplace hygiene hazard if released. Furthermore, shredder
operation generates heat. If the dust contains organic vapors from vaporizing grease
or oil in the scrap, this can result in a signicant explosion hazard. As a result, all
dry shredders have a dust collection system (part 10 in Figure 5.5), operating under
negative pressure to draw the dust off (Gesing, 2006).
One option for eliminating the dust from shredding operations is to spray water into
the shredder (Gesing, 2006; Manouchehri, 2007). Moist shredding adds the ...