低质焦炭下高炉炉尘及喷吹煤粉利用率

doi:10.13228/j.boyuan.issn0449-749x.20150041

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Abstract In order to investigate the effects of low-quality coke on utilization rate of pulverized coal into BF of Anyang Steel， two batches of charging coke and BF dust were analyzed. The quality of coke and carbon content of BF dust were measured. Since the petrographical microstructure of unconsumed pulverized coal and coke in dust were different， the amount of coal and coke could be quantitated via lithofacies analysis. Based on the present coal blending situation， the combustion rate of three pulverized coals was examined. Effects of volatile on combustion rate of pulverized coal with different particle size were researched， which could provide an effective guidance to improve the utilization rate of pulverized coal in low-quality coke situation. The results show that the carbon content and UPC (unconsumed pulverized coal) in BF dust are comparatively high. The UPC in the dust is made up of thermally altered coal and residual carbon particles while the unconsumed coke is mainly composed of mosaic structure. Keeping the coke quality steady and low moisture content could contribute to the decrease of carbon content of BF dust. It’s suggested that coal B should be the first selected anthracite and the volatile of pulverized coal should be controlled at around 17%.

Key words： low-quality coke BF dust utilization rate of pulverized coal optimized coal blending

Received: 21 January 2015 Published: 03 December 2015

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	Articles by authors
	YAN An
	WU Keng
	LIU Xiao
	MEN Zheng-Zhao
	SHEN Wei
	YUN Xiao

Cite this article:

YAN An,WU Keng,LIU Xiao等. Dust and utilization rate of pulverized coal injection into BF in low-quality coke situation[J]. Iron and Steel, 2015, 50(12): 85-90.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20150041 OR http://www.chinamet.cn/Jweb_gt/EN/Y2015/V50/I12/85

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