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The article presents the results of studies of spraying multicomponent coal-water slurries with hot air. Coal, water, ethanol, and pyrogenetic liquid were used as fuel components. It has been established that, in comparison with a two-component coal-water fuel, the jet opening angle increases by 14–25%, which significantly increases the jet volume and the ignition zone. The droplets velocity in the jet increases by 9–13% when the air is heated by 50 K; with further heating, the increase in droplets velocity is insignificant (not more than 4%). It has been proved that spraying the studied coal-water slurries with hot air allows reducing the average droplet size in the jet by 7–12% compared to cold spraying (at 293 K). [ABSTRACT FROM AUTHOR]