Technical actions for decrease in harmful effects on the surrounding environment from the rotating furnaces of agglomeration of JSC RUSAL Achinskare offered. Additional technical solution on tertiary treatment of flue gases of the furnace of agglomeration in a scrubber electric precipitators and the direction of purified gases on repartition of carbonization of the aluminous shop is developed. the providing decrease in harmful emissions in the atmosphere to the level of maximum-permissible concentration. The carried-out trial tests of the offered technology confirmed that except effective purification of flue gases of furnaces of agglomeration of inorganic dust and carbon dioxide the high extent of decomposition of alyuminatny solution necessary for technology of receiving alumina is provided.
To reduce the impact of alumina sludge storage on the environment, a number of environmental technical solutions have been tested and implemented. Laying a polymeric film on a bed slurry maps and the construction of artificial water level decrease led to the absence of anthropogenic interference, and created favorable conditions for ensuring the stability of the ecological system in the area adjacent to the sludge storage. After the implementation of the environmental events area negative impact of sludge decreased to 150–200 m from the contour of the slurry of the map, outside this zone there are qualitative changes in the chemical composition of groundwater, the alkaline reaction of the environment decreases less than 8.0 units, chemical composition of groundwater is virtually the same background.
Two common fungicides: Vial TrasT (60 g/l tebuconazole and 80 g/l thiabendazole) and Oplot (90 g/l difenoconazole and 45 g/l tebuconazole) were tested for effectiveness against seed-borne toxigenic fungi Fusarium spp. and Alternaria spp. using naturally infected wheat (Triricum aestivum L., cultivar Novosibirskaya-14) seeds collected from the field located near Krasnoyarsk, Russia. Treatment with Oplot statistically significantly reduced Fusarium infection by 10 percentage points (from 31.4% to 21.4%) and statistically significantly reduced Alternaria infection by 25.8 percentage points (from 42.9% to 17.1%). Treatment with Vial TrasT demonstrated no statistically significant effect in reducing infection both for Fusarium and Alternaria. The results demonstrates that populations of Fusarium spp. and Alternaria spp. in Middle Siberia have developed resistance to tebuconazole and thiabendazole, but not to difenoconazole.
In this paper, it is the previous system of gas treatmenton sintering furnaces used at JSC “RUSAL Achinsk”, consisting of a dust chamber and electro filters, did not provide the necessary treatment degree. Old four-field electro filters were not effective and required constant replacement and adjustment of electrode systems and shaking mechanisms. Shown that the modernization of gas treatment equipment in alumina production reduces the emissions of polluted substances into the air. The introduction of technical solutions for modernization of obsolete and worn-out electric filters to more modern and efficient five-layer electro filters increases the degree of gas treatment from sintering furnaces from inorganic dust. The introduction of an additional stage of “wet” gas treatment on sintering furnaces in scrubbers has been confirmed by industrial tests, while ensuring high efficiency of gas treatment from fine-disperse dust. When using sub-sludge water as an irrigation liquid at the stage of “wet” gas treatment, it was not necessary to build additional treatment facilities, since the modernization project provides for its subsequent return to the hydrochemistry shop for technological needs.
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