Technological modeling of the process hydrofluorination of uranium oxide

Obtaining UO$_2$ and UF$_4$ are important steps in the production UF$_6$. This paper includes the numerical research of the distribution of material flows of the main reacting substances and heat fluxes by the dimensions of the industrial combined-type apparatus for the hydrofluorination of uranium dioxide (ACT). The main heat losses that affect the temperature fields in the reaction zones of the hydrofluorination reactor occur in the zones of the apparatus that are practically unprotected by thermal insulation. The temperatures of the hydrofluorination process along the axis of the apparatus and near its wall are calculated. It is shown that in the middle and outlet zones the temperature field is not uniform, especially in the final zone IV, which will negatively affect the quality of the product. The difference in temperature values reaches 100–180$^\circ$. ANSYS software is used to perform calculations and visualize the results. Recommendations are given on the modernization of the ACT design in order to reduce heat losses.