PROCESS AND INSTALLATION FOR CONTINUOUS REMOVAL OF UNWANTED CONSTITUENTS FROM SOLID PARTICLES AND APPLICATION TO THE MANUFACTURE OF NUCLEAR FUEL

摘要

In this process and this installation, a fluidized bed of solid particles to be purified is maintained in a vertical column 2 ′ by means of an ascending vertical stream of solvent introduced at 8 and exiting at 4 after having passed through a settling zone. The particles are introduced by an upper valve 6 and extracted by a lower valve 7. After sufficient purification of a charge of particles, part of this charge is extracted through the valve by means of a descending stream of solvent introduced at 9.