文献〔1〕指出:用铝脱氧,残铝量0.03—0.06%的钢再加0.15—0.20%铈铁、混合金属或φ—5合金,其性能最好,此时残存的稀土金属为0.02—0.04%,因此其回收率仅只15—20%。这就限制了铈铁,混合金属和φ—5合金在工业上的应用。在国外,炼钢有用纯稀土氧化物的,也有用含30%以下稀土的中间合金的。苏联已发展用资源丰富的廉价原料生产硅基、铝基和硅铝基稀土中间合金的工艺。因此,研究它们对 Literature [1] pointed out: with aluminum deoxidation, 0.03-0.06% of the residual aluminum content of steel plus 0.15-0.20% of cerium iron, mixed metal or φ-5 alloy, the best performance, the residual rare earth metal 0.02- 0.04%, so the recovery rate is only 15-20%. This limits the industrial applications of cerium iron, mixed metals and φ-5 alloys. In foreign countries, steel useful for pure rare earth oxides, but also useful with less than 30% of the rare earth alloy. The Soviet Union has developed a process for the production of silicon-based, aluminum-based, and silicon-aluminum-based rare earth master alloys from resource-rich and cheap raw materials. So, study them right