Patent ID: 6551100
Filing Date: 2003-04-22
Classification: C04B,F27B,Y02P

Abstract:
Apparatus for the heat treatment of meal-form raw material, which is pre-heated in a pre-heating stage, calcined in a calcining stage, undergoes final roasting in a combustion stage and is cooled in a cooling stage, wherein the calcining stage contains a pipeline through which the exhaust gases of the combustion stage flow having an ascending branch, at least one descending branch and a diversion zone arranged therebetween, characterised in that the diversion zone is formed by a diversion chamber (2) that comprises a first section (2b) that is widened compared with the cross-section of the ascending pipeline branch (1) and is bounded upwardly by a deflecting wall (2a) oriented substantially transversely to the direction of flow of the material entering the diversion chamber (2) via the ascending pipeline branch (1), adjoining which first section is at least one second section (2c) that runs obliquely downwards and tapers conically to the cross-section of the descending pipeline branch (3, or 3a, 3b).