Effect of CaO/Al2O3 Ratio in Fluorine‐Free Refining Slag with Low Basicity on the Cleanliness of SWRS82B Steel

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-28 DOI:10.1002/srin.202400314

Ruiqi Luo, Yudong Zhao, Linzhu Wang, Chaoyi Chen, Junqi Li

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引用次数: 0

Abstract

A fluorine‐free quaternary CaO–Al2O3–SiO2–MgO refining slag for SWRS82B coil steel is studied by considering the requirements of the steel wire. Laboratory experiments are conducted to study the equilibrium and kinetics of steel–slag reactions. The physical and chemical properties of refining slags, including the melting temperature, viscosity, and MgO solubility, are estimated by FactSage7.2 calculation. The cleanliness of SWRS82B steel refined by slags with a basicity of 1 and C/A ratio in the range of 1.36–7.13 is studied systematically. The plasticity of inclusions is studied by phase diagram and Young modulus calculation. Deoxidizing capacity and desulfurization capacity of refining slags are discussed by kinetic calculation of steel–slag reactions based on FactSage7.2 macro‐editing and the kungliga tekniska högskolan model. Slag with a composition of 42%CaO–47%SiO2–4%Al2O3–7%MgO has the best refining effect, in which impurity elements are lowest and plastic inclusions with the smallest size and least quantity are obtained. The impurity elements oxygen and sulfur in steel can be controlled for 29 and 75 ppm, respectively. The average size of inclusions is 1.54 μm. The majority of inclusions are in a liquid state at 1600 °C and Young modulus of the inclusions ranges from 99.78 to 152.87 GPa.

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低碱性无氟精炼渣中的 CaO/Al2O3 比对 SWRS82B 钢洁净度的影响

考虑到钢丝的要求，研究了用于 SWRS82B 卷钢的无氟四元 CaO-Al2O3-SiO2-MgO 精炼渣。通过实验室实验研究了钢渣反应的平衡和动力学。通过 FactSage7.2 计算估算了精炼渣的物理和化学特性，包括熔化温度、粘度和氧化镁溶解度。系统研究了碱性为 1、C/A 比在 1.36-7.13 范围内的炉渣精炼 SWRS82B 钢的清洁度。通过相图和杨氏模量计算研究了夹杂物的塑性。通过基于 FactSage7.2 宏编辑和 kungliga tekniska högskolan 模型的钢渣反应动力学计算，讨论了精炼炉渣的脱氧能力和脱硫能力。成分为 42%CaO-47%SiO2-4%Al2O3-7%MgO 的炉渣具有最佳的精炼效果，其中杂质元素最少，获得的塑性夹杂物尺寸最小、数量最少。钢中的杂质元素氧和硫可分别控制在 29 ppm 和 75 ppm。夹杂物的平均尺寸为 1.54 μm。大多数夹杂物在 1600 °C 时处于液态，夹杂物的杨氏模量范围为 99.78 至 152.87 GPa。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.