Integration of Material Cycles in the Automotive Industry

The BMW Group and a consortium of industrial and academic partners are collaborating to develop and implement infrastructure for the recovery of automotive materials through the Car2Car project. The technical solution aims to establish closed material loops for steel, aluminum, and copper within vehicle manufacturing supply chains.

Operational Challenges and Collaboration
The automotive industry requires recycling infrastructure capable of separating complex materials to meet the stringent quality requirements of manufacturing. To overcome the limitations of standard recycling methods, the BMW Group collaborates with research institutes, such as the Technical University of Munich and the TU Bergakademie Freiberg, and industrial partners, including material producers and waste management specialists. This cooperation integrates metallurgical and engineering expertise to scale processing and prepare material flows for future European directives on end-of-life vehicles.

Technical Solution and Responsibilities
The project's technical architecture focuses on optimizing the physical sorting and mechanical processing phases. Partners in the recycling sector manage the pre-sorting processes, modified shredding, and sensor-based separation of material streams to isolate specific aluminum alloys. The BMW Group and steel producers coordinate an additional processing phase aimed at isolating and reducing copper contamination in scrap. The process infrastructure subsequently handles the melting of the sorted scrap into new flat steel with structural parameters suitable for mechanical applications.

Deployment and Implementation
The implementation of the sorting technologies is validated along a real industrial value chain. Minimum mandatory dismantling and recycling protocols were applied to four hundred and thirty-three vehicles belonging to sixty different models. The recovered materials were integrated into the production infrastructure at the BMW Group plant in Leipzig. During this operational phase, the purified steel was used for the stamping and assembly of over one hundred thousand standard components destined for new vehicles.

Applications and Use Cases
These material processing methods are applied directly to the industrial circular economy and the manufacturing of structural automotive components. Technical use cases include the recovery of copper from electrical wiring and the limitation of metallic impurities during the remelting phases. The application of this logistical architecture stabilizes the material supply for manufacturers and reduces reliance on primary extraction.

Results and Expected Impact
The integration of these sensor-based sorting and classification processes has increased the percentage of materials recovered for new applications from six percent to fifty-one percent. Specifically, recovery efficiency rose to eighty-one percent for steel, fifty-two percent for aluminum, and sixty-eight percent for copper. Regarding the dynamics of the industrial tests, Hilke Schaer, Car2Car project manager at the BMW Group, stated: "The most significant progress was observed in steel: we were able to demonstrate that high-quality flat steel for automotive applications can be produced from end-of-life vehicle scrap."

Edited by Maria Brueva, editor at Induportals – adapted by AI.

www.bmwgroup.com