When residual waste is incinerated, various non-combustible materials are left behind: ashes, bricks, ceramics – and also metals such as iron, aluminum and copper. With Brantner Slagtory technology, even the smallest metals, the thickness of a human hair, can be removed from the ash. These are crushed, washed, sieved and the metals and salts removed. Approximately 80% of the resulting ashes can be recycled and does not have to be disposed of in landfills. This saves large amounts of CO2.

The metals filtered out of the ash can be fed back into the cycle. This can save up to 95% energy per ton of recycled aluminum compared to primary aluminum, for example. Battery boxes and engine blocks are made from the recycled aluminum. The recycled copper is used to produce motors for e-mobility.