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在20吨和200吨普通钢包中,用压入法加入稀土,分别处理平炉和转炉冶炼的16Mn 钢,脱硫率平均达51％,稀土回收串约为22.1％,钢中长条状 MnS 夹杂消失,夹杂物形态控制效果良好,稀土和硫在钢锭中的分布较均匀,连轧带钢的塑性、韧性、冷弯、冷冲压性能得到显著改善,尤其各部位冲击值的模向/纵向比值成倍提高。从各方面显示出比多年沿用的包内投入法有显著的技术经济效益。目前,这个稀土加入方法已在鞍钢150吨氧气顶吹转炉冶炼含稀土钢时正式使用。
In 20 tons and 200 tons of ordinary ladle, adding rare earth by press-in method, separately processing 16Mn steel melted by open hearth furnace and converter, desulfurization rate averaged 51%, rare earth recovery string was about 22.1%, long strip MnS inclusions disappeared in steel , Inclusions morphology control effect is good, the distribution of rare earth and sulfur in the ingot more evenly, even the strip of steel plasticity, toughness, cold bending, cold stamping properties have been significantly improved, in particular, the various parts of the impact modulus value / longitudinal ratio into Times higher. From all aspects of the package used in many years than the input method has significant technical and economic benefits. At present, the method of adding rare earth has been officially used in Angang Steel 150 tons oxygen top converter smelting rare earth-containing steel.