Recycling industry uses a variety of sorting technologies for processing both the heavy fraction (stainless steel, copper, brass, etc.), and light fraction (aluminium, and magnesium alloys) of ELV scrap.
• Heavy fraction: Due to the heterogeneity of the non-ferrous heavy fraction, the accuracy of the available sorting technologies is limited when dealing with materials with similar properties (colour, density, etc). In particular, conventional electromagnetic sensors are unable to accurately identify the composition of the scrap fragments, due to the relatively small differences in the conductivity of the metals commonly found in scrap. To overcome this limitation, SHREDDERSORT aims at developing a new sensing approach to probe the electrical properties of the fragments (Electromagnetic Tensor Spectroscopy), which shall enable sorting metal scrap into different materials.
• Light fraction: In spite of the growing demand for the recovery of high value alloys in the light fraction, particularly aluminium and magnesium, existing separation methods provide limited performance in terms of cost and/or throughput. As an alternative to existing separation methods, SHREDDERSORT proposes a new sorting approach based on Laser Induced Breakdown Spectroscopy (LIBS). The final goal is to establish a high throughput separation process for cast and wrought type alloys, as well as a sorting technology to identify selected individual high value alloys.