Home – Home – Jornals – Chemistry for Sustainable Development 2021 number 5

The results of the studies aimed at the improvement of the mode of flotation of flocculated coal due to the application of Sinterol, a new modifying reagent, are reported. Coals from the basins of the Russian Federation with different degrees of organic mass mineralization were used as the initial coal samples. When applying the modifying reagent Sinterol in the amount of (1-3) · 10^-3 kg/t and simultaneously reducing the total consumption of reagents by 13.0 % on average (from 3.000 to 2.613 kg/t), the concentrate yield increased by 2.5-8.5 %, the ash content of the concentrate decreased by 2.7-3.0 % the extraction of combustible mass into the concentrate increased by 2.9-7.1 %. The ash content of the waste increased by 2.9-12.3 % and was in the range of 72.6-82.0 %. A decrease in the ash content of the concentrate and an increase in the ash content of the waste with an increase in the modifying reagent input are explained by the flocculating effect of the reagent on the mineral particles of the pulp, which is important for flotation of hard-to-enrich coal fines containing a large amount of clay substances. The efficiency of the Sinterol flocculant reagent at its low consumption was revealed. The reason is the prevailing enlargement of the particles of mineral impurities and a decrease in their floatability together with the organic mass of coals.