Increase in Efficiency of Processes of Purification of Gases of Aluminous Production

Pochechun

2023

PMI

The specific hydrogeoecological conditions of aquifers of some technogenic formations, mainly iron ore skarn-magnetite and titanium-magnetite formations, are considered. The resulting wastes, which are stored in waste disposal sites during development of deposits, due to the impact of a number of factors (natural and technogenic) form technogenic waters. Waste disposal facilities are complex engineering structures (dumps and sludge storages), which in turn create their own hydrogeoecological conditions, which must be investigated in order to prevent and minimize environmental and economic damage caused by these objects to the aquatic environment. The paper presents long-term field and laboratory studies of the aquatic environment under the influence of a waste disposal facility in the Middle Urals – one of the largest tailings, representing a potential environmental and frшman-made hazard. This tailing dump contains tens of tons of waste – enrichment tailings and creates specific hydrogeoecological conditions on the territory. Based on many years of monitoring studies, an analysis of these conditions was carried out – the quality of groundwater affected by the tailings was assessed. It is shown that groundwater is of technogenic nature, i.e. are man-made waters that have a significant impact on the surface and underground hydrospheres of the territory.

mentioning

confidence: 99%

Hydrogeoecological conditions of technogenic groundwater in waste disposal sites

Pochechun

2023

PMI

Disposal of Fine Dust During Complex Processing of Nepheline Raw Materials

2023

Methods of utilization of process dust by returning it to the rotary kiln are considered. To reduce the emission of fine dust of electrostatic precipitators into the atmosphere and to increase the efficiency of its utilization it was proposed to remove it from the furnace turnover, not to mix it with the dust of the dust chamber, and then to dispose of it according to a separate scheme. It has been established that the return to the correction pool of the raw materials workshop of JSC RUSAL Achinsk of fine technological dust caught in the 1st, 2nd and 3rd electric field of the sintering furnace electrofilters will reduce the consumption of limestone to 530 thousand tons per year, while improving the overall environmental situation at the industrial enterprise.

Reduction of Fine Dust Emissions During Sintering of Nepheline-Lime-Stone Charge

et al. 2023

It was found that dust of electrostatic precipitators supplied to the sintering furnace from the hot end precipitates little on the sintered material of the raw charge of alumina production of JSC "RUSAL Achinsk", increases the dust turnover and dust release of solid pollutants from the furnace into the atmosphere. In order to increase efficiency of purification of atmospheric air from fine dust of electric precipitators it is proposed to remove it from dust circulation of the sintering furnace and dispose of it separately in technology of road mixture when laying the base of road pavements. The introduction of this technology provides a reduction in atmospheric emissions from 18.965 to 5.859 g/s, a reduction in coal consumption by 1.39 kg of conventional fuel for the production of 1 ton of sinter and savings of coal fuel by 8350 tons per year.