Determination of the Main Characteristics and Modeling of the Classification Matrix of the Concentrator in a Closed Grinding Cycle

The paper shows the complexity of closed systems for grinding fine powders based on grinding-classifying complexes. The problems of modeling the separation process and predicting the granulometric composition of fine powders are presented. It is shown that the main parameter that determines the operation of the separator of any generation is the efficiency of its operation. Analytical expressions of national and foreign researchers are given, which allow determining the efficiency of the separation process in an air separator. It is indicated that these expressions do not take into account the design features of separation devices, their layout schemes, etc. It is shown that a more complete informative characteristic will be a model for determining the fractional efficiency of particle capture of the developed installation. In this paper, probabilistic dependencies are used to predict the fractional efficiency of the device used. For the proposed apparatus, the full deposition coefficients of the corresponding fractions are obtained. Its high efficiency is shown. The main task of modeling the separation process is to predict the granulometric composition of the finished product. This finished product depends on the composition of the starting material, the design and technological parameters of the machines and mechanisms involved in the separation process. However, at the present time, only previously known systems for separating grinding products are used. Therefore, it is necessary to search for technical and technological solutions aimed at increasing the productivity of grinding complexes. It is proposed to introduce an additional concentrator between the separator and the cyclone in the grinding complex, which will increase the productivity of the complex itself.