Method and device for
producing cement clinker

(22) 23.05.2022

(43) 01.12.2022

(57) The present invention relates to a method for producing cement clinker (50), said method comprising the steps of: preheating raw material (20) in a preheater (12), calcining the preheated raw material (26) in a calciner (14), burning the preheated, precalcined raw meal (32) in a kiln (16) to obtain cement clinker (38), wherein a combustion gas (42) containing an oxygen proportion of more than 20 vol.%, in particular more than 40 vol.%, preferably more than 60 vol.%, is supplied to the kiln (16), and cooling the cement clinker (38) in a cooler (18), the cooler (18) having a first cooling region (18a) and a second cooling region (18b) in the conveying direction of the cement clinker (38), the exhaust air of the first cooling region (18a) forming the combustion gas (42), the exhaust gas (24) of the second cooling region (18b) being fed to the calciner (14) and having an oxygen proportion of a maximum of 15 vol.%, in particular a maximum of 10 vol.%, preferably a maximum of 5 vol.%.

(71) thyssenkrupp Industrial Solutions AG; thyssenkrupp AG (DE)