高钙烟煤主要特性及高炉喷吹工艺性能综合评价

doi:10.13228/j.boyuan.issn1006-9356.20230395

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Abstract In order to expand coal resources, iron and steel enterprises are exploring the application potential of high calcium bituminous coal in blast furnace injection. Taking the 27 finished coals for sale in Shendong mining area as the main research objects, one kind of bituminous coal and three kinds of anthracite commonly used for blast furnace injection were used as the comparisons, the advantages and disadvantages of Shendong high calcium bituminous coal and bituminous coal and anthracite commonly used in blast furnace injection were comparatively studied using the national detection standard combined with descriptive statistical methods in terms of coal quality characteristics and blast furnace injection process performance indicators. The results show that, compared with 28-Shanxi bituminous coal commonly used in blast furnace injection, Shendong high calcium bituminous coal has the coal quality characteristics of low ash, high carbon, high carbon-to-hydrogen ratio (w(C)/w(H)), low nitrogen, low sulfur, high calorific value, high calcium, as well as high silicon-aluminum ratio, some Shendong high calcium bituminous coals also have the characteristics of super-low sulfur coal and ultra-low sulfur coal. Except for the high ash content of No.1, No.7 and No.22 coals, the other 24 kinds of Shendong high calcium bituminous coal can be used for blast furnace injection. In addition, in terms of blast furnace injection process performance indicators, grindability index, ignition point temperature, explosiveness, fluidity index and jet flow index of Shendong high calcium bituminous coal are better than or close to 28-Shanxi bituminous coal. However, the ash melting point softening temperature of Shendong high calcium bituminous coal is relatively low, which is basically around the average value of 1 147 ℃. By optimizing coal blending, the shortcoming of Shendong high calcium bituminous coal ash melting point can be avoided and provide guarantee for the reasonable and efficient application of Shendong high calcium bituminous coal in blast furnace injection process.

Key words： blast furnace injection high calcium bituminous coal coal quality characteristics process performance ash melting point

Received: 20 June 2023

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	Articles by authors
	GUO Hao
	LI Yanjiang
	HU Qichen
	SUO Yanshuai
	QIAO Junqiang
	ZHANG Jianliang

Cite this article:

GUO Hao,LI Yanjiang,HU Qichen等. Main characteristics of high calcium bituminous coal and comprehensive evaluation of blast furnace injection process performance[J]. China Metallurgy, 2023, 33(10): 24-33.

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http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20230395 OR http://www.zgyj.ac.cn/EN/Y2023/V33/I10/24

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