| 摘要 |
A device in kilns comprises a rotatable kiln tube (1), one end (2) of which forms an inlet (2) for material to be heat-treated and the other end (3) of which forms an outlet (3) for the material. Means (8) are provided to obtain heat influence on the material in the kiln tube. At the outlet end thereof a dam (18) is arranged, the material having to pass by said dam to get out of the kiln tube. The dam (18) is stationarily arranged relative to the kiln tube in the sense that the dam cannot rotate in unisson with the kiln tube. |
