| Popis: |
Problems in existing suction systems of casting yard, bunker rack, receiving device with transshipment units of blast furnace number 7 «Rossiyanka» of Novolipetsk Iron and Steel Works are considered. It is noted that the design capacity of the blast furnace was 9 450 tons of cast iron per day, and the blast furnace produces about 13 000 tons of cast iron per day now. The aspiration system was not designed for such a load. The increased dustiness and gas content at the workplaces leads to a number of problems: health of the plant's employees, decrease in product quality, product losses, decrease in labor productivity. It is noted that the dustiness of the air in some points of the workplace of the casting yard exceeds the maximum allowable concentration by 1.2...6 times (which is 7.2...36 mg/m3). The issues of reconstruction of existing suction systems, repair or replacement of installed equipment, improvement of local suction systems are considered. The whole range of activities carried out in the foundry yard and other processing facilities will reduce the dust concentration in the working area to the level of maximum allowable concentrations. Ways to reduce the amount of suspended solids emissions into the atmosphere to the level of 5 mg/m3 on the proposed additional gas cleaning systems are proposed. The proposed reconstructive measures will reduce the total quantity of solid emissions to the atmosphere of Lipetsk by an amount of about 1 794 kg/hour or 11 481 600 kg/year. |
