利用高含碳金属化团块实现高炉炼铁的节焦

doi:10.13228/j.boyuan.issn0449-749x.20190343

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Abstract The blast furnace (BF) ironmaking is the dominant process for hot-metal production and the low-coke operation in BF ironmaking has been long focused. Applying high carbon metallic briquette (HCMB) in BF for coke saving has been studied.The HCMB was prepared using ultrafine iron oxide and non-coking coal fines, and the mass percent of the HCMB sample was 15.6%. Under the simulated BF conditions, the behavior of the HCMB, including mass change, crushing strength change, and microstructure evolution was examined. The gasification kinetics of the HCMB carbon was investigated using the custom-built experimental setup. The coke saving effect of applying HCMB in the BF was analyzed by simulations. Experimental results show that an iron crust was formed in the outer periphery of the briquette under the BF simulation conditions and the briquette has a good anti-pulverization capability; the main reaction of the briquette is carbon-solution loss reaction, and the briquette has a high CO₂ reactivity in the BF. Simulation results on a BF of 2 500 m³ indicate that by mixing 5% HCMB in the ore burden, the BF can realize coke reduction of 11.9 kg for producing 1 t hot metal from the ore, and a productivity increase of 419 t/d; moreover, change of the BF operation condition is not required.

Key words： metallic briquette blast furnace crushing strength solution-loss reaction coke saving

Received: 29 July 2019

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	Articles by authors
	RONG Tao
	TANG Hui-qing
	FAN Kai
	SUN Yan-jun

Cite this article:

RONG Tao,TANG Hui-qing,FAN Kai等. Applying high-carbon metallic briquette in blast furnace for coke saving[J]. Iron and Steel, 2020, 55(5): 10-19.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190343 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I5/10

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