Abstract: A biaxial vent extruder for processing of slurry-like waste fluids or radioactive waste fluids having a hopper cylinder having a solidifying substance port and a solidified substance port. A plurality of vent cylinders each having a vent port are provided with a plunger type scraper. An extruding cylinder having a single opening for a main screw is connected to the assembled vent cylinders. The main screw extends to the upstream end of the extruding cylinder and a sub-screw extends to the extruding cylinder. The screws each having a full flight engaging the other and a set of rings are mounted on the screws near the respective vent port inlets. The screws are rotated in different directions and inwardly with respect to the vent ports. Rotors may be mounted on the screws to break down solid particles.

Abstract: A die formed of a series of concentric rings is disclosed. An outer body has a series of communication ports for the introduction of a heating medium. An inner body having the same axial thickness as the outer body is placed inside the outer and in the annular space defined between the inner and outer bodies a series of annular rings are placed. The annular rings each have a series of nozzles disposed in a circumferential ring and are formed with grooves on their outer walls to define jackets between the rings. The jackets are in communication with the communication ports to supply a heating medium to the jacket.