An apparatus for the thermical treatment of non-gaseous material, which apparatus comprises a body of revolution, located in a housing having a bottom and comprising a substantially vertically oriented chamber which tapers toward the bottom, whose side is open for the ejection of thermically treated non-gaseous material, the body of revolution being rotatable around the chamber's longitudinal axis and the apparatus is provided with means for the thermical treatment of the non-gaseous material, the chamber having at its tapered end an opening which is located at a distance from the bottom of the housing, the opening of a wide end of the chamber being located within the housing wherein the body of revolution (2) proximate to a lower chamber (4) opening is provided with a protruding blade element (12) for carrying solid material-comprising material from the bottom (11) of the housing (1) into the chamber (4) for thermical treatment, wherein the bottom (11) of the housing (1) is provided with means for the fluidization of material located at the bottom (11) of the housing.