Process for producing calcined mineral binder material with reduced carbon footprint

Abstract

A method to produce a calcined mineral binder material includes the steps of: a) providing a source material including a mineral binder material, carbonating the source material with carbon dioxide such that the mineral binder material is at least partially, in particular essentially completely, carbonated to produce a carbonated product; b) calcining a carbonate-containing material to produce a calcined mineral binder material and carbon dioxide as side product; whereby in step a) the carbon dioxide side product of step b), optionally in combination with further carbon dioxide from a different source, is used as the carbon dioxide for carbonation of the source material; and in step b) the carbonate-containing material includes the carbonated product of step a), and optionally other material.

Dependencies are inferred from the claim text.