铁焦制备与高炉应用的研究进展

doi:10.13228/j.boyuan.issn0449-749x.20200187

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Abstract The iron and steel industry has been facing the current situation of resource shortage and environmental pollution for a long time, and energy saving, emission reduction and green metallurgy are the key points for the sustainable development of iron and steel industry. Blast furnace (BF) ironmaking is the key to energy conservation and emission reduction in iron and steel industry. So it is urgent to develop new low carbon blast furnace ironmaking technologies. Iron coke is a new type of carbon-iron compound burden for low carbon BF ironmaking. The utilization of iron coke in BF can decrease the temperature of heat reserve area, improve smelting efficiency, reduce coke ratio and reduce CO₂ emission. The research progress on the preparation and application of iron coke at home and abroad were reviewed, mainly including the preparation process and BF application. The characteristics of various iron coke preparation processes were summarized. At the same time, the new technology of cold press molding-shaft furnace carbonization-BF application for iron coke preparation and application was proposed and studied. The preparation, metallurgical properties optimization and application in BF of iron coke by cold press molding were studied systematically. The suitable process conditions for the preparation of iron coke by cold press molding are as follows: 30% iron ore powder, 45% bituminous coal 1, 10% bituminous coal 2, 10% bituminous coal 3, 5% anthracite and 5% asphalt binder B are mixed and heated to 60 ℃, and then cold pressed into briquettes. The briquettes are carbonized at 1 000 ℃ for 4 h by shaft furnace. High quality iron cokes with compressive strength of 3 977 N, I type drum strength of 77.7%, reactivity of 69.7%, post-reaction strength (fixed gasification solution loss 20%) of 42% were obtained finally. By adding 20%-30% iron coke into the blast furnace burden, the melting and dropping performance of the burden are improved obviously. The above research results can provide a reference for the industrial production of iron coke and the application of iron coke in low carbon BF ironmaking.

Key words： iron coke carbon-iron compound burden low carbon blast furnace energy saving CO₂ emission reduction

Received: 12 April 2020

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	Articles by authors
	BAO Ji-wei
	CHU Man-sheng
	LIU Zheng-gen
	HAN Dong
	CAO Lai-geng
	GUO Jun

Cite this article:

BAO Ji-wei,CHU Man-sheng,LIU Zheng-gen等. Research progress on preparation and application of iron coke in blast furnace[J]. Iron and Steel, 2020, 55(8): 38-48.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200187 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I8/38

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