Abstract: A drier, especially for viscous materials, comprises a double-wall cylindrical vessel which is heated and to which the material to be dried is fed at one end with the dried material being removed at the opposite end. A drying gas inlet is connected to the drying chamber to pass the drying gas in counterflow or uniflow with the material and a shaft is rotatable along the axis of the chamber and carries adjustable disks with alternately inner and outer openings so that the material path through the vessel is deflected toward and away from the axis as the material passes successively through adjustable-length cells between these disks. All of the disks carry blades which scrape the material from the heated wall from the vessel and at least some of the disks carry rollers of predetermined spacing from this wall to adjust the particle size of the dried product.

Abstract: A method and device for filling containers with evaporated radioactive waste concentrates that are mixed with bitumen and from which the water has been expelled by creation of temperatures above the boiling point of water, in which the temperature of the waste mixture is substantially reduced below the water expelling temperature immediately before loading the mixture into the containers.