Abstract
Blast furnace useful volume of 1370 cubic meters, Public Joint Stock Company “Magnitogorsk Iron and Steel Works” have explored the parameters of the blast furnace, including indicators drainage capacity of the coke nozzles in the furnace, using the charge composition of the wash material. In the special period of the loaded silica-manganese material containing 15,8 % of manganese, and 45 % silicon dioxide, the local area corresponding to the stations No. 6-7 angular position of the tray bell-less charging Device for flushing horn of the furnace in the appropriate zone of the ore ridge. Use it in an amount of 36 kg per ton of pig iron for a period of 6 days improved drainage capacity of the coke nozzles in the furnace is a furnace for a number of indicators: decrease the amount of slag remaining in it after the release of fusion products by 4,46 %; DMI index by 13,07 %; the temperature difference of the cooling water refrigerators horn by 0,92 %; the standard deviation of the amount of slag tap holes between 0,92 % and increased the solubility of carbon in iron by 1,63 %. Improvement of the drainage ability of the furnace horn increased technical and economic indicators of milting. Reducing the specific coke consumption was 4.4 kg per ton of pig iron, increasing productivity – 10 ton per day.
Keywords
Blast furnace, pig iron, slag, flushing horn, silica-manganese material, coke.