Steel-refractory reactions in lanthanum-,cerium-,and yttrium-added steels

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外文摘要：A systematic experimental study was conducted on the similarities and differences in the reactions between commonly used rare earth elements(REEs)and frequently used refractories in the steelmaking industry.The results indicate that the reaction behaviors of La,Ce,and Y with MgO,Al2O3,and MgO·Al2O3 crucibles differed significantly.The consumption rates of La,Ce,and Y in the molten steel were in descending order of La＞Ce＞Y for smelting with all three kinds of crucibles.As the REEs reacted with the crucible,the contents of Mg and Al showed a trend of first increasing and then decreasing.Under laboratory-scale smelting conditions,the reactions related to REEs were dominated by steel-crucible reactions,and the contact area between the unit mass of molten steel and refractory materials mainly determined the consumption rates of REEs.La-and Ce-crucible reactions generated loose and porous reaction interfaces;however,Y-crucible reactions generated a dense Y2O3 layer,dramatically suppressing the consumption rate of Y.Dynamic cal-culation indicated that the reactions between rare earth and different refractory materials were first-order reactions.The crucible materials significantly affected the product type and morphology of the steel-crucible reaction interfaces,thereby influencing the consumption rate of REEs.The reactions between REEs and refractories must be seriously considered,especially for small-scale smelting.

外文关键词：

Rare earthInclusionRefractoryThermodynamicsDynamics

作者：

Jian Kang、Hong-po Wang、Yu Wang

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作者单位：

College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China

The State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China

基金：

Self-Topic Fund of the State Key Laboratory of Mechanical Transmissions,ChinaNatural Science Foundation of Chongqing,ChinaNational Natural Science Foundation of China

项目编号：

SKLMT-ZZKT-2022M10cstc2021jcyjmsxmX098852374326

出版年：

2024

DOI：

10.1007/s42243-023-01163-5

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(6)