Ferrous metallurgy enterprises emit a significant amount of fine dust into the atmosphere every year. The article presents the results of a study performed to determine the dispersed composition of the dust of the ingredients in the emissions of the furnaces of the chipboard steelmaking workshop. The combined use of energy dispersive spectroscopy (EDS) and energy dispersive X-ray spectroscopy of the analysis made it possible to obtain the fractional composition of the ingredients, the values of equivalent dust particle sizes and the integral dependences of the distribution density for equivalent sizes (diameters) were obtained D ingredients containing dust from chipboard furnaces in the samples. Based on the conducted research, it was concluded that it is possible to use certain types of dust collectors in dedusting systems to achieve an acceptable value of their effectiveness to improve the environmental safety of the steelmaking shop.

Keywords: metallurgy, aerosol, dust, ingredient, particle, dust collector, electric steelmaking shop, dispersion analysis, distribution density,average median diameter, dh 50

The article assesses the impact of road transport on air pollution of roadside areas of a major transport highway in Volgograd. The road-car complex makes a significant contribution to air pollution by solid particles, significantly exceeding the background value. One of the criteria for assessing the impact of dust particles on the air environment according to the World Health Organization is the mass content of particles with a diameter of less than 10 microns (PM10) and 2.5 microns (PM2.5) in atmospheric air, which is normalized in the territory of the Russian Federation by hygienic standards. The fractional composition of dust particles entering the atmospheric air was assessed by the Microtrac S3500 laser particle analyzer, the concentration by the Lighthouse 3016-IAQ particle counter. The results of the dispersion analysis are presented in the form of the Rosin–Rammler–Sperling–Bennett function of the volume distribution of particles over diameters.

Keywords: dust, particle, dispersed composition, concentration, road transport, atmospheric air, transport highway

The article considers measures to ensure environmental safety. The analysis of the technological process of cement production was carried out, which revealed the main sources of dust emission. The results of the study of the dispersed composition of cement dust are presented.

Keywords: disperse composition of dust, PM10 and PM2.5, environmental safety, cement dust

The article deals with the issue of the influence of ambient temperature on the initial height of the flare emissions rise. The paper presents full-scale and theoretical studies of flare emissions operating near a temporary residential complex. In the course of the work, a series of images of flare emissions at different ambient temperature conditions was carried out and their subsequent comparison with the theoretical model was carried out. Field studies verify the theoretical model and establish that the initial height of the flare emissions depends on the ambient temperature and has an inverse proportionality.

Keywords: Flare, flare emissions, atmospheric air pollution, PM2.5

The article discusses the impact of emissions into the atmosphere, formed as a result of combustion of associated petroleum gas, on the chemical composition of settled dust near the gas torch. The paper presents full-scale studies of the emissions of a torch operating near a settlement, the chemical composition of particles in the obtained samples of settled dust is studied. In the course of the work, the results obtained were compared with research data obtained for areas where there is no flare combustion. As a result of this comparison, it was concluded that flare emissions have a significant impact on the chemical composition of settled dust in the vicinity of existing flare systems.

Keywords: soot, flare emissions, air pollution, black carbon, settled dust