氧化铁对不锈钢渣中尖晶石结晶行为和空间分布的影响

严梓航; 赵青; 韩承志; 梅孝辉; 刘承军; 姜茂发

doi:10.1007/s12613-023-2713-7

Volume 31 Issue 2

Feb. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(2): 292-300

Zihang Yan, Qing Zhao, Chengzhi Han, Xiaohui Mei, Chengjun Liu, and Maofa Jiang, Effects of iron oxide on crystallization behavior and spatial distribution of spinel in stainless steel slag, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 292-300. https://doi.org/10.1007/s12613-023-2713-7

Cite this article as:

Zihang Yan, Qing Zhao, Chengzhi Han, Xiaohui Mei, Chengjun Liu, and Maofa Jiang, Effects of iron oxide on crystallization behavior and spatial distribution of spinel in stainless steel slag, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 292-300. https://doi.org/10.1007/s12613-023-2713-7

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研究论文

氧化铁对不锈钢渣中尖晶石结晶行为和空间分布的影响

1)
东北大学多金属共生矿生态化冶金教育部重点实验室, 沈阳 110819, 中国
2)
东北大学冶金学院, 沈阳 110819, 中国

通讯作者:
赵青 E-mail: zhaoq@smm.neu.edu.cn

文章亮点

(1) 系统地研究对比分析了FeO、Fe₂O₃和Fe₃O₄对不锈钢渣中尖晶石结晶行为的影响。

(2) 重点研究了FeO含量对不锈钢渣中尖晶石相结晶行为和空间分布的影响。

(3) 揭示了FeO对不锈钢渣的改质作用机理。

中文摘要

不锈钢渣中含有铬组元，对生态环境和人体健康具有极大危害。将铬赋存于尖晶石相，是提升铬稳定性，防止铬氧化和溶出的重要措施。为促进铬在尖晶石相富集，强化尖晶石晶体生长，本文研究了铁氧化物对尖晶石结晶行为和空间分布的影响。研究结果表明，与Fe₂O₃和Fe₃O₄相比，FeO更利于尖晶石的生长。尖晶石主要分布在炉渣的顶部和底部，底部的尖晶石随FeO含量的增加而减少，而顶部的尖晶石则呈相反趋势。在FeO含量为18wt%的炉渣中，尖晶石的平均粒径为12.8 µm。进一步提升FeO含量，尖晶石平均粒径变化不大。当FeO含量在8wt%–18wt%的范围内增加时，尖晶石的空间分布发生变化。在FeO含量为23wt%时，炉渣底部尖晶石明显降低。

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Research Article

Effects of iron oxide on crystallization behavior and spatial distribution of spinel in stainless steel slag

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Abstract

Abstract

Chromium plays a vital role in stainless steel due to its ability to improve the corrosion resistance of the latter. However, the release of chromium from stainless steel slag (SSS) during SSS stockpiling causes detrimental environmental issues. To prevent chromium pollution, the effects of iron oxide on crystallization behavior and spatial distribution of spinel were investigated in this work. The results revealed that FeO was more conducive to the growth of spinels compared with Fe₂O₃ and Fe₃O₄. Spinels were found to be mainly distributed at the top and bottom of slag. The amount of spinel phase at the bottom decreased with the increasing FeO content, while that at the top increased. The average particle size of spinel in the slag with 18wt% FeO content was 12.8 µm. Meanwhile, no notable structural changes were observed with a further increase in FeO content. In other words, the spatial distribution of spinel changed when the content of iron oxide varied in the range of 8wt% to 18wt%. Finally, less spinel was found at the bottom of slag with a FeO content of 23wt%.
- stainless steel slag;
- spinel;
- chromium;
- waste remediation;
- ferrous oxide

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