*3.4. Electrostatic Separation*

From Table 4, as expected, it is possible to observe a small amount of conductive product for the finest grain size (<0.3 mm). This low efficiency can be explained due the fact that metals have a high mechanical strength and the fine material resulting from comminution mainly consisted of fiberglass.

**Table 4.** Weight percentage of the products and losses obtained by electrostatic separation and their yield.


For the class size >1.18 mm, the conductive product obtained was copper grains attached to the fiberglass and the epoxy resin. The content of conductive elements (copper) reached more than 64% (in mass). The nonconductive product had an appearance with a predominance of polymer and fiberglass.
