Oxalic precipitation is usually applied to process radioactive wastes or to recover actinides from a multicomponent solution. Precipitation reactions being highly sensitive to many operation parameters, the computer simulation appears to be a very effective tool to predict the evolutions of the system subjected to various operating conditions. This study focuses on the description of a modelling development for a precipitation operation. The modelling which combines both kinetic laws and hydrodynamics is applied to simulate the industrial process of the tetravalent uranium oxalate precipitation. The hydrodynamic model is based on the Large Eddy Simulation approach (LES). The objective is to show how the modelling can be supporting the process control.
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