氮气污染钢液。钢中含氮量高,钢的塑性、焊接性能及时效性能下降。因此,随着转炉复合吹炼工艺的开展,低部使用氮气搅拌的复合吹炼,钢中含氮量的变化受到普遍重视。然而,在目前缺少不污染钢液的惰性气源条件下,如何使用易得、 Nitrogen pollution of molten steel. Nitrogen in steel is high, steel plasticity, welding performance and aging performance decline. Therefore, with the development of the converter compound blowing process, the nitrogen blowing mixing in the lower part is used, and the change of the nitrogen content in the steel is generally valued. However, under the current lack of inert gas source that does not pollute molten steel, how to use readily available,