Abstract: A drying apparatus comprises a cylindrical rotatable drum (1), the inside of which is provided with a steam pipe system consisting of heat transfer elements (7), to be rotated with the drum. The heat transfer elements (7) are detachable from and mountable on the drum (1). Material to be dried is fed to a first end of the drying apparatus, the material being arranged to be discharged through a second end of the drying apparatus. The heat transfer element (7) is formed as a uniform packet of several longitudinal pipes (8) and connecting pipes (9) between them in such a way that the structure of the heat transfer element is formed self-supporting and that this self-supporting packet is attached to the drum (1) frame with fastening that allows heat expansion.

Abstract: The invention concerns a steam dryer, in particular a steam dryer intended for drying of concentrate materials, which dryer comprises a cylindrical, rotatable drum (11), in whose interior a set of steam pipes (12) consisting of a number of pipes has been fitted to revolve along with the drum. The steam intended for drying of the material has been arranged to be supplied into the set of steam pipes (12) by means of steam supply devices fitted at a first end (10A) of the dryer, and at the opposite end (10B) of the steam dryer (10), conveyor (16) has been installed to supply the material to be dried into the drum (11) interior. The dried material (25) has been arranged to be discharged through the first end (10A) of the dryer.