Method and system for producing cement clinker from raw cement mixture

A process for producing cement clinker from cement raw meal, comprising:

• a. part of the cement raw meal is preheated in a calciner preheater and the other part of the cement raw meal is preheated in a furnace preheater;
• b. the cement raw meal which has been preheated in the calciner preheater and in the furnace preheater is precalcined in a calciner operated by the oxy-fuel process;
• c. the precalcined cement raw meal is fired in a furnace;
• d. the fired cement raw meal is cooled in a cooler;
• e. the calciner preheater is operated using calciner exhaust gases from the calciner;
• and
• f. the furnace preheater is operated using furnace exhaust gases from the furnace;
• g. an entrained flow reactor is used as calciner, with a part of the calciner exhaust gas being, after having been utilized in the calciner preheater, recirculated to the calciner;
• and
• h. the furnace exhaust gas is subjected to a post-combustion removal of CO2, wherein a heat requirement for the post-combustion removal of CO2 is covered by the waste heat from an unrecirculated part of the calciner exhaust gas, of the furnace exhaust gas and/or of an exhaust gas from the cooler.