Modeling of the process of receiving granules by using of specialized industrial technological plant is demonstrated in the article. The plant is equipped with a dispersion camera, an electrode rotation mechanism, a knot of the gas mix supply, a source of plasma heating, a system of water cooling of the camera walls. The method of the rotating electrode with plasma heating (PREP) is used. By this method the rotating electrode moves in the dispersion camera where, as a result of melting by the plasma arch, a liquid film of metal forms at an end face of the electrode. The mathematical model of the process with all the technological operations is developed. It is shown that numerical modeling of the process of cooling of the sprayed metal particles in the gas environment allows to predict the most important parameters of process and to choose the most favorable values of the equipment parameters.