Polysius activated clay for less CO_2 emissions in the production of cement clinker

摘要

The application of the polysius activated clay technology allows cement producers to further reduce the clinker factor. Substituting clinker with activated clay has a positive impact on the costs and sustainability of cement production. Activated clay as Supplementary Cementitious Material (SCM) makes the cement more carbon neutral. Activated clay causes about 70 % less CO_2 emissions compared to one tonne of cement clinker. Standard cement clinker production emits approx. 790 kg CO_2/t of clinker, mainly coming from the limestone calcination. By production of activated clay only approx. 180 kg CO_2/t (direct emissions) are emitted.