钢中稀土加入方法对钢中稀土的存存状态、残留数量和分布状况有直接影响。以前,鞍钢多年沿用包内投入法。这种方法的缺点是稀土的有效利用率很低、稀土作用效果不稳定、稀土合金消耗大,易引起浇注水口结瘤堵塞。1980年,由鞍山钢铁公司、中国科学院金属研究所、冶金部 The method of rare earth addition in steel has a direct impact on the storage status, residual quantity and distribution of rare earth in steel. Previously, Anshan Iron and Steel package used for many years into law. The disadvantage of this method is that the effective utilization of rare earth is very low, the effect of rare earth instability, expensive consumption of rare earth alloys, easy to cause clogging of the nozzle pouring. 1980, Anshan Iron and Steel Company, Institute of Metal Research, Chinese Academy of Sciences, Ministry of Metallurgy