Apparatus and process for thermal denitration, use of such an apparatus and product obtained by means of such a process

A facility for thermally denitrating a uranyl nitrate hydrate, having the formula UO2(NO3)2,xH2O with 2≤x≤6, into uranium trioxide UO3 including:

• a burner,
• a reaction chamber disposed at the outlet of the burner and including an inlet of uranyl nitrate hydrate, said reaction chamber and the burner being configured to make a thermal denitration of the uranyl nitrate hydrate and to form uranium trioxide UO3 having the form of particles,
• a separation chamber adapted to separate a part of the UO3 particles from gases from the thermal denitration made in the reaction chamber, and
• at least one filter configured to separate another part of the UO3 particles from the gases and thus scrub the gases,
• wherein the separation chamber is a sedimentation chamber into which the reaction chamber directly opens at an opening of the sedimentation chamber, the opening of the sedimentation chamber being above a particle outlet of the sedimentation chamber, the particle outlet being configured to recover the part of the UO3 particle separated from the gases into the separation chamber,
• and wherein the filter is able to make the separation at a temperature higher than or equal to 350° C.