B2O3-Na2O系调渣剂对钒钛铁水脱硫渣性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20210078

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Abstract In order to solve the problems of thick of slag, large of iron loss, and much of resulfurization in the slagging-off process after pre-desulfurization of hot metal containing vanadium and titanium, the effect of B₂O₃-Na₂O slag modifier on resulfurization, melting point, and viscosity of the desulfurization slag was investigated by using FactSage thermodynamic software and combing with high-temperature experiments. The results showed that the melting point and viscosity of the desulfurization slag decreased significantly with the addition of B₂O₃ and Na₂O. And the addition of CaO to the slag modifier helped to reduce resulfurization. The formula of slag modifier (45%-55% of CaO, 10%-12% of SiO₂, 5%-8% of Al₂O₃, 15%-20% of B₂O₃, and 5%-10% of Na₂O) to improve the performance of desulfurization slag was presented. It effectively reduced the melting point and viscosity of desulfurization slag and decreased the resulfurization, when the added amount of the slag modifier was 5%-10% of the desulfurization slag.

Key words： hot metal containing vanadium and titanium desulfurization slag resulfurization performance of slag slag modifier

Received: 05 February 2021

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	YANG Bi-wen
	WANG Hai-bei
	ZHENG Chao-zhen
	CHEN Liang
	HU Yi-hang

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YANG Bi-wen,WANG Hai-bei,ZHENG Chao-zhen等. Effect of B₂O₃-Na₂O slag modifier on desulfurization slag performance of hot metal containing vanadium and titanium[J]. Iron and Steel, 2021, 56(10): 91-98.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20210078 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I10/91

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