摘要:
分析了邯宝钢铁有限公司高炉重力除尘灰的着火点、可磨性、喷流性等性能,利用煤粉燃烧炉研究助燃剂对除尘灰燃烧率的影响,采用煤岩学岩相测试技术分析除尘灰中未燃煤粉和焦炭存在的不同结构形态,确定了邯宝高炉除尘灰中含碳物质的来源。结果表明,邯宝高炉除尘灰中的碳元素含量比较高,且其可磨性、喷流性能优于喷吹煤粉。高炉重力除尘灰中焦炭的显微组成包括块状结构、片状结构、流动结构、粒状镶嵌结构和类丝碳;未燃煤粉的显微组成包括有机残碳颗粒、微变原煤颗粒、气孔原煤颗粒。结合喷吹高炉重力除尘灰经济效益的分析,得出邯宝高炉可以进行重力除尘灰的喷吹应用。
关键词:
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高炉 /
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重力除尘灰 /
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喷吹 /
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燃烧性能 /
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岩相分析
Abstract:
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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