Fateiev A. Energy technological aspects of attracting salt coal of the Northern Donbass to the energy fuel base.

The thesis is devoted to the study of the possibility of attraction the reserves of salted coal from the Northern Donbass to the fuel base of energy of Ukraine. Experimental studies of the process of coal desalination by aqueous extraction were performed. The influence of a number of factors has been determined: the duration of contact of coal with water, water and coal masses ratio, and conditions under which contact of coal with water is carried out (intensity and nature of mixing, temperature, particle size and mineralization). On the basis of the obtained dependencies, a technical solution is proposed for the possibility of desalting salted coal at processing plants, where the necessary equipment is available - grinding, washing, dewatering and drying equipment. Experimental studies the combustion of salty and desalted coals were performed. The influence of the natural catalytic complex (salts of alkali and alkaline earth metals) on the gas release and combustion of coke of salty coal is determined. The influence of desalination on corrosion and slag properties of salty coal is considered. The analysis of the mineral component of the ash mixtures was performed, which showed that as a result of high-temperature ashing there are not only phase transitions of low-melting alkaline salts, but also interaction with other minerals that are part of the mixture, namely the formation of refractory minerals. This solves the problem: the content of sodium oxide and chlorine in the mixture decreases, sodium is converted into refractory compounds, and the overall reactivity of the composite fuel increases.