Influence of Top Slag Containing TiO2 and VOx on Hot Metal Pre-Desulfurization

IF 2.6 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals Pub Date : 2024-08-11 DOI:10.3390/met14080910

Biwen Yang, Bo Song, Liang Chen, Honghong Sun, Derek O. Northwood, Kristian E. Waters, Hao Ma

引用次数: 0

Abstract

The desulfurization capacity of top slag in the process of pre-desulfurization of hot metal containing vanadium and titanium was researched. The top slag system of CaO-SiO2-MgO-Al2O3-TiO2-VOx that was formed by blast furnace slag and a CaO desulfurization agent reduced the sulfur in hot metal from 0.08 wt.% to 0.02 wt.%. It was found that the resulfurization of the slag happened in the later periods of the desulfurization process. The vanadium–titanium oxides were both acidic in the desulfurization slag. TiO2 and VOx reacted with the basic oxides to form CaTiO3 and MgV2O4 at 1623 K, which reduced free CaO and was not conducive to top slag desulfurization. The results of calculation showed that the top slag desulfurization accounted for 15% of the total desulfurization. Using the ionic and molecule coexistence theory of slag structure, it is shown that the desulfurization efficiency could be enhanced by adjusting both the amount of desulfurization agent and the composition of the blast furnace slag before pre-desulfurization.

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含 TiO2 和 VOx 的顶渣对热金属预脱硫的影响

研究了炉顶渣在含钒钛热金属预脱硫过程中的脱硫能力。由高炉炉渣和 CaO 脱硫剂形成的 CaO-SiO2-MgO-Al2O3-TiO2-VOx 炉顶渣系统可将热金属中的硫从 0.08 wt.% 降至 0.02 wt.%。研究发现，炉渣的再硫化发生在脱硫过程的后期。脱硫渣中的钒钛氧化物均呈酸性。TiO2 和 VOx 在 1623 K 时与碱性氧化物反应生成 CaTiO3 和 MgV2O4，使游离 CaO 减少，不利于炉顶渣脱硫。计算结果表明，顶渣脱硫占总脱硫量的 15%。利用炉渣结构的离子和分子共存理论，可以通过调整脱硫剂的用量和预脱硫前高炉炉渣的成分来提高脱硫效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metals MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

4.90

自引率

13.80%

发文量

1832

审稿时长

1.5 months

期刊介绍： Metals (ISSN 2075-4701) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Metals provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of metals.