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介绍了铸钢在平炉冶炼及钢包中加稀土硅铁合金进行脱硫的试验研究。大量生产数据统计分析表明，钢中硫含量对铸钢件的验收条件之一──断口拉边尺寸有直接影响。当铸钢中其它元素不变时，每降低０．００１％硫，增大断口拉边尺寸０．３１８ｍｍ，脱硫率与炉料熔化时间及造渣时间呈负相关，与纯沸期脱碳速度及出钢温度呈正相关。在钢包中加入稀土硅铁合金可对铸钢进一步脱硫并控制硫化物的形态。工业规模试验结果表明，应控制ＲＥ／Ｓ的比值，以确保铸钢件的质量，使其获得较高的综合力学性能。
The experimental research on the desulphurization of cast steel in open hearth smelting and ladle with rare earth ferrosilicon alloy was introduced. The statistical analysis of mass production data shows that the sulfur content of steel has a direct impact on the size of the flanges of the steel for the acceptance of the steel castings. When the other elements in the cast steel remain unchanged, for every 0.001% reduction of sulfur, increasing the size of the fracture edge 0.318mm, the desulfurization rate is negatively correlated with the melting time of the charge and the slagging time, Tapping temperature was positively correlated. Rare earth ferrosilicon alloy added to the ladle can be further desulfurization and control of sulfide shape. Industrial scale test results show that the ratio of RE / S should be controlled so as to ensure the quality of steel castings and to obtain higher comprehensive mechanical properties.