In detail, the concept involves the use of a so-called carbonator, which is intended to capture CO2 from the kiln exhaust gas through the carbonation of CaO, and an Oxyfuel-driven calciner to generate the purest possible flow of CO2. The CaO/CaCO3 is then exchanged between these units and/or partly circulated. Once it has been cooled for heat recovery, the CO2-enriched exhaust gas flow is transferred to a processing installation. Thus it's possible to capture the CO2 emissions arising from both the fuel and the material.