不同碳含量的MgO-C耐火材料与超低碳钢液的相互作用

发布时间：2018-10-17 15:17

【摘要】：研究了3种C含量的(3%、5%、10%,质量分数)MgO-C耐火材料与超低碳钢的相互作用。利用ICPAES、氧氮分析仪、碳硫分析仪检测了与实验MgO-C耐火材料接触的钢液的成分,用XRD分析了耐火材料反应前后的物相变化,并利用SEM观察了耐火材料/钢界面。结果表明,随着镁碳耐火材料中C含量的增加,耐火材料/钢界面附近的渗透层厚度增加;反应后钢液中的C、N、Al含量以及Mg含量随着耐火材料中C含量的增加而增加,钢中O含量随之降低;反应前后的镁碳耐火材料都有镁铝尖晶石的存在,高C含量的耐火材料反应后镁铝尖晶石含量增加,因此低碳镁碳耐火材料更有利于超低碳钢的生产。
[Abstract]:The interaction of three kinds of C (C) MgO-C refractories with ultra-low carbon steel was studied. The composition of molten steel in contact with experimental MgO-C refractories was detected by ICPAES, oxygen nitrogen analyzer and carbon sulfur analyzer. The phase changes of refractories before and after reaction were analyzed by XRD, and the interface between refractories and steel was observed by SEM. The results show that with the increase of C content in magnesia-carbon refractories, the thickness of permeable layer near the interface of refractories / steel increases, and the content of CnnnAl and Mg in molten steel after reaction increases with the increase of C content in refractories. The content of O in the steel decreased and the magnesia-aluminum spinel existed in the magnesia-carbon refractories before and after the reaction, and the content of magnesia-aluminum-spinel increased after the reaction of the high-C refractories, so the low-carbon magnesia-carbon refractories were more favorable to the production of ultra-low carbon steel.
【作者单位】：武汉科技大学省部共建耐火材料与冶金国家重点实验室;武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室;北京科技大学钢铁共性技术协同创新中心;
【基金】：国家重点基础研究发展计划(973)基金资助项目(2014CB660802)
【分类号】：TF703;TQ175.1

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