DETERMINING THE REQUIRED ORE GRINDING SIZE

Abstract

To achieve the desired concentrate quality, it is necessary to ensure sufficient opening of the material, namely, the specified ore grinding size before enrichment. Therefore, this work is devoted to finding a functional relationship between the required final grinding size and the parameters of the ore supplied for enrichment, provided that the content of the valuable mineral in the concentrate is a specified value βКЗ, and its loss in the tailings is limited by νХ < νХДОП. In carrying out the work, the method of generalization of scientific information, analytical, probabilistic-statistical research methods were used. The work proposes an approach to the analytical calculation of ore exposure parameters, namely: the number of exposed ore and rock grains, rich and poor grains, based on given enrichment indicators. These indicators are also calculated based on data on the average size of ore grinding and its technological parameters, the main ones being the content of the valuable component αП and the average size of the valuable mineral inclusion dBK. By comparing the calculated value of the overburden parameters with the required one (obtained at the previous stage), the average size of ore grinding is determined. The practical significance lies in the fact that the proposed method allows accurately calculating the average size to which the ore must be crushed in order to obtain a concentrate with the desired quality characteristics, which will help avoid excessive over-crushing. This approach can be used at the design stage of new enrichment plants, providing a scientific and technical basis for making decisions based on analytical calculations.