Establishment of mathematic modeling for crystallization of inorganic substances in practical conditions of Vietnam

By the experimental and calculated methods, it was proved that the precipitation of Ammonium Diuranate occurred firstly at the input of material's place in the apparatus before the whole solution reached the over-saturated concentration. The local over-saturation of the system depended on the following parameters: structure of apparatus; rate of material's flow; kinetics of precipitation. With the use of over-saturated character of this system, it is possible to improve the precipitation according to the tendency to increase and decrease in fineness of product. (author)