The process is based on an innovative grinding technology applied for the first time in Europe for recycling. The new plant combines a variable pressure grinding system (Metso HRC8 crusher) with an air flow system (Metso Air Classifier AC30), making it possible to separate and recover the cement paste during the crushing operation without grinding the original aggregate. Isolating very fine materials with a high concentration of cement in demolition concrete provides carbon-free additions to the manufacturing of new cements.
The plant was built in Saint-Laurent-de-Mure in France and taken into operation in September 2023. The plant will serve as a pilot to deploy this equipment in France from 2024.