目前,稀土金层的生产及其在冶金和铸造行业中的应用正从传统的昂贵的电解稀土合金(混合稀土金属和铈铁)转向稀土中间合金和稀土铁合金。其制取方法是用铝、硅铁、硅钙和碳还原稀土氧化物和氟化物。还原法生产出的稀土金属的成本明显降低,并且在处理液体金属时,其损失也大为减少。稀土铁合金和稀土中间合金通常是在电弧炉中以硅、铝和碳还原稀土氧化物来制取的。按此工艺流程制取的稀土中间合金的特点是硅含量高(～50％),REM:Si=1:2。 Currently, the production of rare earth gold layers and their applications in the metallurgical and foundry industries are shifting from the traditional expensive electrolytic rare earth alloys (mixed rare earth metals and cerium) to rare earth master alloys and rare earth ferroalloys. Its preparation method is to use aluminum, ferrosilicon, calcium and carbon rare earth oxides and fluoride reduction. The cost of the rare earth metals produced by the reduction method is significantly reduced, and the losses in handling the liquid metals are greatly reduced. Rare earth ferroalloy and rare earth master alloys are usually prepared by reducing rare earth oxides with silicon, aluminum and carbon in an electric arc furnace. The rare earth master alloy prepared by this process is characterized by high silicon content (~ 50%), REM: Si = 1: 2.