渣相组分对高炉炉缸死焦堆滞留率的影响

doi:10.13228/j.boyuan.issn0449-749x.20200105

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Abstract In order to investigate the influence of blast furnace slag composition on the static holdup rate of slag in the deadman, a self-designed slag penetration coke experimental device was used to simulate the process of blast furnace slag flowing through the deadman in the hearth. The effect of basicity (w(CaO)/w(SiO₂)) and w(MgO)/w(Al₂O₃) on the static holdup rate of slag were also studied. The results show that as the basicity increasing, the ability of the slag dripping through the packed coke beds increases and the static holdup rate decreases. When the w(MgO)/w(Al₂O₃) is relatively low, the static holdup rate is high. When the w(MgO)/w(Al₂O₃) ranges from 0.5 to 0.55, the static holdup rate reaches its minimum. When the w(MgO)/w(Al₂O₃) is relatively high, the static holdup of "liquid bridges" becomes larger due to the better wettability between slag and coke, and the static holdup rate increases to a certain extent. The process of slag passing through the coke layer is mainly a physical transmission process due to the poor wettability between coke and slag. However, the SiC phase produced on the coke/slag interface as a result of the penetration of slag through the pores of the coke can improve the wettability.

Key words： blast furnace static holdup rate basicity w(MgO)/w(Al₂O₃) blast furnace hearth

Received: 13 March 2020

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	Articles by authors
	HU Xiang-yu
	ZHANG Jian-liang
	LIU Zheng-jian
	JIAO Ke-xin
	FAN Xiao-yue

Cite this article:

HU Xiang-yu,ZHANG Jian-liang,LIU Zheng-jian等. Effect of slag composition on holdup rate of deadman in blast furnace hearth[J]. Iron and Steel, 2020, 55(10): 15-20.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200105 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I10/15

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