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用试样旋转法在1600℃下实验研究了CaO－SiO2－Al2O3－MgO－CaF2（3％）型精炼渣组成对电熔再结合镁铬砖的侵蚀影响．结合渣浸试样的电镜分析，结果表明，随渣碱度（CaO／SiO2）的增大，试样的侵蚀增加；碱度大于1．8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含量的增加能沽少侵蚀．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．
The influence of the composition of CaO-SiO2-Al2O3-MgO-CaF2 (3%) type refining slag on the electrofusion combined with magnesia-chrome brick was experimentally investigated by the sample rotation method at 1600 ℃. Combined with the analysis of slag immersion samples, the results show that with the increase of slag basicity (CaO / SiO2), the erosion of the samples increases; when the basicity is greater than 1.8, the samples are powdered during the cooling process. Due to the formation of the spinel protective layer, the increase of Al2O3 content in the slag can sell less erosion. With the increase of MgO content in the slag, the erosion of the sample is reduced. On the basis of this, the favorable refining and slagging system outside the furnace for improving the lining of magnesia-chrome brick are discussed.