摘要
用试样旋转法在１６００℃下实验研究了ＣａＯＳｉＯ２Ａｌ２Ｏ３ＭｇＯＣａＦ２（３％）型精炼渣组成对电熔再结合镁铬砖的侵蚀影响．渣浸试样电镜分析的结果表明，随渣碱度（ＣａＯ／ＳｉＯ２）的增大，试样的侵蚀增加；碱度大于１８时，试样在冷却过程中粉化．由于尖晶石保护层的生成，渣中Ａｌ２Ｏ３含量的增加能减少侵蚀．随渣中ＭｇＯ含量的增加，试样的侵蚀减少．在此基础上，讨论了对提高镁铬砖炉衬有利的炉外精炼造渣制度．
Applying a specimenrotation method and with the aid of electronic microscope analyses,the influence of the composition of typical secondaryrefining slags of the CaOSiO2Al2O3MgOCaF2(3%) system on the corrosion of fusedrebounded magnesite chrome (MgOCr2O3) refractory has been experimentally studied. The corrosion increases with increase in slag basicity (CaO/SiO2) from 06 to 15,and specimen spalling in cooling occurs at higher basicity of 18～25 due to the phase transition of the newlyformed 2CaO·SiO2. Increase of Al2O3 content from 10% to 35% in slag can greatly suppress the corrosion by forming a spinel protective layer on the surface of the specimen. The presence of more MgO in slag can also slow down the corrosion merely by lowering the driving force for the dissolution of MgO form refractory into slag. Based on experimental results,the favorite slagmaking system for furnace lining life is also discussed in this paper.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第6期597-601,共5页
Journal of Northeastern University(Natural Science)
基金
辽宁省博士启动基金
关键词
耐火材料
侵蚀
精炼渣
镁铬砖
高炉
炉衬
refractory corrosion,secondaryrefining slag,MgOCr2O3 refractory.
