the problems of moisture (cooling) in the mass-transfer apparatus at different parameters of fluid spray and varying the magnitude of the influence of the electric field in the zone of the spray.

Keywords: heat and mass transfer, mist dispersion, electroaerosol, electrostatic dissipation.

The article deals with the design of experiments for dispersed particles capturing in elektrocyclone. The autors gives planning matrix calculation, the regression equation based on the aerosol velocity and the initial concentration of the aerosol and plot of function.

Keywords: gas cleaning; cyclone; elektrocyclon; fly ash

High purity ultrafine aluminum nitride is produced by gas-phase approach, however there is an issue to divide AlF3 and AlN at the final step of synthesis. Recently, the problem is solved by sublimation of aluminum trifluoride in vacuum, but due to high temperatures aluminum nitride particles agglomerate into chunks with dimension about 8 μm, hence the new alternate methods of separation is in a great interest. Flotation in organic environment is considered to divide aluminum trifluoride and aluminum nitride. The process of AlN and AlF3 interaction with organic and element-organic matters was investigated and the following conclusions were made: there is agglomeration and sedimentation stability of AlN and AlF3 in organic environments and flotation possibility was experimentally proved, hence, flotation after special treatment is a possible approach to divide powders of aluminum trifluoride and nitride.

Keywords: aluminum trifluoride, aluminum nitride, gas-phase synthesis, aglomeration, sedimentation, sublimation

The article presents the results of experimental research of the fine mist collection in the electrostatic presipitator.The data confirm the high efficiency of electric cleaning in point of oil mist

Keywords: gas dust cleaning, electrostatic precipitator, mist collection, collection efficiency, metal-working

The article presents the results of experimental research of the re-entrainment reduction in the electrocyclone. The authors shows an increase in the collection efficiency of ash up to 99.5% and reduction of entrainment in 4 times when profiled elements was install  on collection electrode surface

Keywords: gas dust cleaning, electrocyclone, re-entrainment, collection efficiency, ash from thermal power plants