Purpose. To substantiate the ways of the integrated lignite use as well as its derivatives by power, metallurgical, chemical, and construction industries of Ukraine to support the competitiveness of the country market. methodology. The following research techniques were applied to solve the problems: mathematical modeling method was used to determine volumes of lignite extraction and to identify the intensity of inflows to opening mine workings while forming the operating area of an open pit; the method of graphic-analytical and mining and geometrical analysis was used to optimize parameters of open-pit mining operations in the process of their deepening; the method of techno-economic analysis of variants was used to select efficient schemes to extract productive lignite levels under complicated mining and geological conditions; and the method of economic modeling was used to determine investment attractiveness of lignite derivatives. findings. Current state of mining enterprises extracting lignite has been analyzed to determine economically viable techniques for its processing. Investment attractiveness has been evaluated concerning ammonia production with the use of a technique of financial and mathematical expenses. Recommendations have been provided as for the future research on lignite mining and processing for the construction of the integral processing enterprise. Originality. Both attractiveness and profitability of ammonia production on the basis of technique of financial and mathematical expenses have been evaluated since ammonia is the most efficient lignite derivative. The studies have shown that IRR of lignite-based ammonia production is over 10 %. Estimation of technical and economic parameters of ammonia production as the basic product makes it possible to recommend lignite and the associated reserves of coal clay as the raw material to generate synthesis gas instead of natural gas used by chemical industry of Ukraine. Calculations on the adopted scheme of a deposit mining have shown that it is possible to produce the cheapest crude hydrocarbons in terms of equivalent to a ton of equivalent fuel in the Ukrainian energy market. The obtained cost values of the equivalent fuel ton are more than 5 times lower compared with natural gas. Practical value. The research results concerning the substantiation of a rational scheme to open and develop productive levels and economic and mathematical modeling of ammonia production make it possible to recommend lignite as crude hydrocarbons for chemical industry which will favor the revival of lignite industry in Ukraine. Construction of a processing complex for ammonia production on the basis of Novo-Dmytrivka deposit with 2.7 to 3.8 million tons of annual output will help decrease the country's dependence on import natural gas; increase pumping up the budgets and funds of all levels by the projected amount of no less than UAH 5 billion a year; provide the local communities with new jobs; attract almost USD 5-6 billion of investment; and develop marginal product ...

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Technological solutions for brown coal processing, thermal influence on it at temperature change, thermo vacuum drying are analysed and qualitative and quantitative characteristics of semi – coking products are studied. The parameters of crushing and thermo vacuum drying of brown coal, heat treatment and cascade separation (electrostatic and magnetic) are substantiated. Studies on the manufacture of a pilot batch of carbon fuel with high quality characteristics are performed. Cascade treatment of heat-treated brown coal on electric and magnetic separators allowed to obtain a concentrate with ash content from 17.72 to 22.8%, volatile yield ≤ 35%, higher heat of combustion from 7256.1 to 7523.6 kcal/kg. It is determined that favourable modes of preliminary heat treatment of brown coal samples are in the temperature range of 200-400°С. The established characteristics of the obtained solid fuel correspond to the gas group of thermal coal. The obtained technological solutions for the processing of brown coal can be the basis for the manufacture of an industrial line, taking into account the thermo vacuum installation for further implementation in enterprises using carbon fuel.

The object of research is technological processes for the complex development of lignite resources, including extraction, processing and the possibility of further use of derived products in the energy sector. The problem solved in the work is related to the underestimation of the complex use of lignite resources of Ukraine to provide fuel for the energy sector, which is suffering significant damage as a result of military operations. In the course of research, the current state, prospects for the development and use of lignite as an energy resource at thermal power plants (TPP) were analyzed. Using the example of the Myronivka lignite deposit, new technological solutions for its complex development are proposed, which include the following stages: – development of technological schemes for conducting mining operations with the possibility of selective extraction of minerals; – identification of promising areas of lignite processing technologies with the involvement of carbonaceous clays; – calculation of technical and economic indicators, social and economic efficiency of field exploitation. It is proposed to determine the rational parameters of the overburden zones during the extraction of at least two minerals in the deposit with the use of internal dumping of overburden rocks in the produced space. In order to minimize the impact of field waterlogging, various options for draining the quarry field will be considered based on three-dimensional modeling. Based on the methodology of expected operating costs, a preliminary economic assessment of the attractiveness of the proposed technological solutions was calculated for a conventional mining enterprise. Graphs of the dependence of mining costs and cost on the productivity of the cut and the overburden ratio were constructed, which made it possible to assert the feasibility of comprehensive development of lignite deposits of Ukraine. It has been established that the expansion of lignite raw materials due to accompanying minerals (coal clay) will lead to an increase in production by mass from 30 to 100 %, and in some cases even more.