Li Yanjiang, Lü Qing, Lu Jianguang, Liu Xiaojie, Huang Honghu, Wang Yan. Injection of Gravity Precipitator Dust into Blast Furnace[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(6): 57-62. doi: 10.7513/j.issn.1004-7638.2015.06.011
Citation:
Li Yanjiang, Lü Qing, Lu Jianguang, Liu Xiaojie, Huang Honghu, Wang Yan. Injection of Gravity Precipitator Dust into Blast Furnace[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(6): 57-62. doi: 10.7513/j.issn.1004-7638.2015.06.011
Li Yanjiang, Lü Qing, Lu Jianguang, Liu Xiaojie, Huang Honghu, Wang Yan. Injection of Gravity Precipitator Dust into Blast Furnace[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(6): 57-62. doi: 10.7513/j.issn.1004-7638.2015.06.011
Citation:
Li Yanjiang, Lü Qing, Lu Jianguang, Liu Xiaojie, Huang Honghu, Wang Yan. Injection of Gravity Precipitator Dust into Blast Furnace[J]. IRON STEEL VANADIUM TITANIUM, 2015, 36(6): 57-62. doi: 10.7513/j.issn.1004-7638.2015.06.011
1. College of Metallurgy and Energy, North China University of Science and Technology, Hebei Key Laboratory of Advanced Metallurgy Technology, Tangshan 063009, Hebei, China;
2. Hebei Iron and Steel Group Co., Ltd., Handan 056015, Hebei, China;
3. Xinxing Ductile Iron Pipes Co., Ltd., Handan 056300, Hebei, China
The properties of gravity precipitator dust of blast furnace (BF) in Hanbao Iron and Steel Co.,Ltd. (Hanbao),including ignition point,grindability and fluidity were analyzed,and the effect of combustion improver on the burning rate of the dust was studied on pulverized burner. The structural morphology of unburned coal powder and coke in the gravity precipitator dust was tested by lithofacies measurement technology,and the origin of carbon materials in the dust was determined. It is indicated that the carbon content in the gravity precipitator dust of BF in Hanbao is relatively high with a better grindability and fluidity than that of pulverized coal. The microstructure of coke in the gravity precipitator dust can be divided into blocky,flake-like,granular mosaic,flowing and filament-like textures,and the unburned coal powder exists as organic residual carbon,micro-change raw coal,stomata raw coal micro-particles.Considering the economic efficiency for injection of gravity precipitator dust into BF,it is put forward that this technology can be applied to Hanbao.
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