Material composition of coal mining waste from the Prokopyevskugol processing plant and the prospect of using the screw separation method for their enrichment

The article contains information about the material composition of coal sludge of the Prokopievskugol Processing Plant. The material is 75.54 % represented by polyphase aggregates of coal, clay minerals, quartz and carbonates with different quantitative ratios of components. The ash content of the feedstock is 32.5 %. The productive size range for this raw material has been determined - from 0.04 to 1 mm. We found that the raw materials were of practical interest in obtaining coal concentrate by screw separation. Our technological tests resulted in coal concentrate with an ash content of 10.95 % of dry fuel from coal sludge by screw separation.