| 摘要 |
<p>Hot uniaxial pressing of capsules containing particulate material is effected in a continuous hot pressing apparatus (13) having a rigid densification tube (31) down which the capsules move in series with movement being controlled by and uniaxial pressure being applied by upstream and downstream hydraulic rams (3) and (33). Heating means are provided for the tube and the tube provides in sequence zones which are for preheating, for densification of the capsules and for cooling of the capsules, the intermediate region of the tube having a progressive increase in internal diameter to correspond with substantially the radial expansion of the capsules during the process whereby the capsules can be pressed along the wall while having restraint to any excess radial expansion. Capsule inlet and outlet ports (46) and (47) are provided at the upstream and downstream ends of the densification tube and the apparatus is one adapted for mounting in an active cell whereby the apparatus can be used in the immobilisation of high level radioactive waste in synthetic rock although the apparatus is equally ueful for the manufacture of ceramic blocks formed from particulate precursor material which is placed in a capsule for the process.</p> |
