10/15/2026
Gold (pure): 19.3 g/cc. Copper: 8.96 g/cc. Most plastics: 0.9 to 1.4 g/cc.
That gap is why gravity separation works on shredded e-waste. Metals report to concentrate, and the plastics, board substrate, glass and ceramic report to tailings.
Read the full article:
https://www.deisterconcentrator.com/resources/deister-news/e-waste-processing