Silvan Thus, Bert-Jan Kuipers
Compared to current mechanical copper recovery techniques the Elemetal solution offers: recovery of high grade pure copper, instead of low grade metal mixes; applicability to all copper grains below 10 mm, which are now lost; and removal of copper salts, which make waste streams toxic. The Elemetal solution is based on a washing process, whereby the copper is dissolved from the ashes. Next, the dissolved copper is recovered electrolytically: sets of two plates with a small voltage in between will produce pure copper deposits on one of the plates. These copper plates are equivalent to the cathodic copper plates produced in copper mining. This results in more value from the waste stream, and less copper that is lost.