Keyword: «coal»

The article takes into account technical and economic, its combustion efficiency, net profit, net present value, compared with the traditional pleasant result of combustion.

The paper presents methods of evaluating the effectiveness of reactants to reduce the freezing of coal products. When choosing such a reactants, an important indicator is the dynamics of changes in their properties during freezing. It is shown that the reactants property not turning into solid (crystalline) state at temperatures -40 and -60 оС are more efficient in reducing the freezing of coals of different rank. It is noted that treatment of coals with such reactants leads to an increase in their total moisture content after freezing-thawing cycle as compared to the untreated coals.

The use of ordinary coal is the main reason for technological stagnation and low efficiency of municipal boiler houses in the Republic of Sakha (Yakutia). The article reveals the key tasks of providing the region with high-quality coal. A preliminary estimate of the upper marginal price for high-quality coal based on the example of its extraction at a conditional mine in central Yakutia indicates the effectiveness of investments in a closed market and a fair distribution of supplies among the main consumer groups. There is a high sensitivity of the coal enrichment process to the amount of fines coming out, which requires the search for optimal crushing technologies and ways to dispose of it. The competitiveness of local coal in comparison with imported coal is possible only after clarifying the optimal technologies for crushing, processing and disposal of coal fines.