Hydraulic cylinders in the shredder
In the shredder a hydraulically controlled roller draws in the electronic waste. The material is then beaten by steel hammers, reducing it in the first phase to pieces sized between 50 and 100 mm. “Iron and aluminium are released relatively quickly,” comments Henze. The iron is separated from the other materials by magnets, and aluminium by eddy current separation. Because the magnetism of stainless steel components is relatively low, high-intensity magnets are used to separate them out. As they are in constant operation the steel hammers of the shredder are subject to wear and tear and have to be replaced regularly. In order to reach the interior of the installation, the upper section of the drum of the shredder is raised by two powerful hydraulic cylinders. “There’s a lot of power in operation there,” states Henze.