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The characteristic of the mineral part of coal ash and slag was given. Briefly considered are the features of metalliferous coal of Siberia, and in more detail of the Kuznetsk basin. The data on the content of iron, nonferrous and rare metals in the coals of the Kuznetsk basin and their ash and slag waste (ASW) are presented. The prospects of using coal and their ash and slag for extraction of scarce and sought-after metals from them are estimated. ASW are identified as the most promising objects for their extraction. To do this, we used hierarchical cluster analysis performed using the IBM SPSS Statistics program, as a result of which dendrograms were built, which made it possible to determine the most promising clusters (metalliferous coal bearing formations). The Ward method was used as the main clustering method. To verify the clustering performed, centroid and median clustering was additionally used. Thus, using the mathematical methods, the Kuzbass coal-bearing formations, coals, and, especially, coal ash-and-ore deposits of which it is economically feasible to develop to produce iron, as well as a number of non-ferrous and rare metals, have been identified. The main provisions of the methodology for geological and economic evaluation of coal seams and ash dumps of energy enterprises, as well as the methodology for assessing the economic feasibility of extracting metals from the most promising object for development – ASW coal.

CLUSTER ANALYSIS OF THE CONTENT OF IMPURITIES IN ASH AND SLAG WASTE OF KUZNETSK COAL